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authorSam Ravnborg <sam@ravnborg.org>2008-11-16 23:08:45 -0500
committerDavid S. Miller <davem@davemloft.net>2008-12-04 12:16:59 -0500
commit27137e5285a3388e8f86d7bc5fe0ed8b92bd4624 (patch)
tree70cd698fb5561743913b5f7615f61df6e8883537 /arch/sparc
parentc37ddd936d96b46cf2bb17e7b1a18b2bd24ec1fb (diff)
sparc,sparc64: unify mm/
- move all sparc64/mm/ files to arch/sparc/mm/ - commonly named files are named _64.c - add files to sparc/mm/Makefile preserving link order - delete now unused sparc64/mm/Makefile - sparc64 now finds mm/ in sparc Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc')
-rw-r--r--arch/sparc/mm/Makefile6
-rw-r--r--arch/sparc/mm/fault_64.c440
-rw-r--r--arch/sparc/mm/generic_64.c163
-rw-r--r--arch/sparc/mm/hugetlbpage.c357
-rw-r--r--arch/sparc/mm/init_64.c2360
-rw-r--r--arch/sparc/mm/init_64.h49
-rw-r--r--arch/sparc/mm/tlb.c97
-rw-r--r--arch/sparc/mm/tsb.c496
-rw-r--r--arch/sparc/mm/ultra.S767
9 files changed, 4734 insertions, 1 deletions
diff --git a/arch/sparc/mm/Makefile b/arch/sparc/mm/Makefile
index 3ad1b1f9953e..681abe0a4594 100644
--- a/arch/sparc/mm/Makefile
+++ b/arch/sparc/mm/Makefile
@@ -4,13 +4,17 @@
4asflags-y := -ansi 4asflags-y := -ansi
5ccflags-y := -Werror 5ccflags-y := -Werror
6 6
7obj-y := fault_$(BITS).o 7obj-$(CONFIG_SPARC64) += ultra.o tlb.o tsb.o
8obj-y += fault_$(BITS).o
8obj-y += init_$(BITS).o 9obj-y += init_$(BITS).o
9obj-$(CONFIG_SPARC32) += loadmmu.o 10obj-$(CONFIG_SPARC32) += loadmmu.o
10obj-y += generic_$(BITS).o 11obj-y += generic_$(BITS).o
11obj-$(CONFIG_SPARC32) += extable.o btfixup.o srmmu.o iommu.o io-unit.o 12obj-$(CONFIG_SPARC32) += extable.o btfixup.o srmmu.o iommu.o io-unit.o
12obj-$(CONFIG_SPARC32) += hypersparc.o viking.o tsunami.o swift.o 13obj-$(CONFIG_SPARC32) += hypersparc.o viking.o tsunami.o swift.o
13 14
15# Only used by sparc64
16obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
17
14# Only used by sparc32 18# Only used by sparc32
15obj-$(CONFIG_HIGHMEM) += highmem.o 19obj-$(CONFIG_HIGHMEM) += highmem.o
16 20
diff --git a/arch/sparc/mm/fault_64.c b/arch/sparc/mm/fault_64.c
new file mode 100644
index 000000000000..a9e474bf6385
--- /dev/null
+++ b/arch/sparc/mm/fault_64.c
@@ -0,0 +1,440 @@
1/*
2 * arch/sparc64/mm/fault.c: Page fault handlers for the 64-bit Sparc.
3 *
4 * Copyright (C) 1996, 2008 David S. Miller (davem@davemloft.net)
5 * Copyright (C) 1997, 1999 Jakub Jelinek (jj@ultra.linux.cz)
6 */
7
8#include <asm/head.h>
9
10#include <linux/string.h>
11#include <linux/types.h>
12#include <linux/sched.h>
13#include <linux/ptrace.h>
14#include <linux/mman.h>
15#include <linux/signal.h>
16#include <linux/mm.h>
17#include <linux/module.h>
18#include <linux/init.h>
19#include <linux/interrupt.h>
20#include <linux/kprobes.h>
21#include <linux/kdebug.h>
22
23#include <asm/page.h>
24#include <asm/pgtable.h>
25#include <asm/openprom.h>
26#include <asm/oplib.h>
27#include <asm/uaccess.h>
28#include <asm/asi.h>
29#include <asm/lsu.h>
30#include <asm/sections.h>
31#include <asm/mmu_context.h>
32
33#ifdef CONFIG_KPROBES
34static inline int notify_page_fault(struct pt_regs *regs)
35{
36 int ret = 0;
37
38 /* kprobe_running() needs smp_processor_id() */
39 if (!user_mode(regs)) {
40 preempt_disable();
41 if (kprobe_running() && kprobe_fault_handler(regs, 0))
42 ret = 1;
43 preempt_enable();
44 }
45 return ret;
46}
47#else
48static inline int notify_page_fault(struct pt_regs *regs)
49{
50 return 0;
51}
52#endif
53
54static void __kprobes unhandled_fault(unsigned long address,
55 struct task_struct *tsk,
56 struct pt_regs *regs)
57{
58 if ((unsigned long) address < PAGE_SIZE) {
59 printk(KERN_ALERT "Unable to handle kernel NULL "
60 "pointer dereference\n");
61 } else {
62 printk(KERN_ALERT "Unable to handle kernel paging request "
63 "at virtual address %016lx\n", (unsigned long)address);
64 }
65 printk(KERN_ALERT "tsk->{mm,active_mm}->context = %016lx\n",
66 (tsk->mm ?
67 CTX_HWBITS(tsk->mm->context) :
68 CTX_HWBITS(tsk->active_mm->context)));
69 printk(KERN_ALERT "tsk->{mm,active_mm}->pgd = %016lx\n",
70 (tsk->mm ? (unsigned long) tsk->mm->pgd :
71 (unsigned long) tsk->active_mm->pgd));
72 die_if_kernel("Oops", regs);
73}
74
75static void bad_kernel_pc(struct pt_regs *regs, unsigned long vaddr)
76{
77 printk(KERN_CRIT "OOPS: Bogus kernel PC [%016lx] in fault handler\n",
78 regs->tpc);
79 printk(KERN_CRIT "OOPS: RPC [%016lx]\n", regs->u_regs[15]);
80 printk("OOPS: RPC <%pS>\n", (void *) regs->u_regs[15]);
81 printk(KERN_CRIT "OOPS: Fault was to vaddr[%lx]\n", vaddr);
82 dump_stack();
83 unhandled_fault(regs->tpc, current, regs);
84}
85
86/*
87 * We now make sure that mmap_sem is held in all paths that call
88 * this. Additionally, to prevent kswapd from ripping ptes from
89 * under us, raise interrupts around the time that we look at the
90 * pte, kswapd will have to wait to get his smp ipi response from
91 * us. vmtruncate likewise. This saves us having to get pte lock.
92 */
93static unsigned int get_user_insn(unsigned long tpc)
94{
95 pgd_t *pgdp = pgd_offset(current->mm, tpc);
96 pud_t *pudp;
97 pmd_t *pmdp;
98 pte_t *ptep, pte;
99 unsigned long pa;
100 u32 insn = 0;
101 unsigned long pstate;
102
103 if (pgd_none(*pgdp))
104 goto outret;
105 pudp = pud_offset(pgdp, tpc);
106 if (pud_none(*pudp))
107 goto outret;
108 pmdp = pmd_offset(pudp, tpc);
109 if (pmd_none(*pmdp))
110 goto outret;
111
112 /* This disables preemption for us as well. */
113 __asm__ __volatile__("rdpr %%pstate, %0" : "=r" (pstate));
114 __asm__ __volatile__("wrpr %0, %1, %%pstate"
115 : : "r" (pstate), "i" (PSTATE_IE));
116 ptep = pte_offset_map(pmdp, tpc);
117 pte = *ptep;
118 if (!pte_present(pte))
119 goto out;
120
121 pa = (pte_pfn(pte) << PAGE_SHIFT);
122 pa += (tpc & ~PAGE_MASK);
123
124 /* Use phys bypass so we don't pollute dtlb/dcache. */
125 __asm__ __volatile__("lduwa [%1] %2, %0"
126 : "=r" (insn)
127 : "r" (pa), "i" (ASI_PHYS_USE_EC));
128
129out:
130 pte_unmap(ptep);
131 __asm__ __volatile__("wrpr %0, 0x0, %%pstate" : : "r" (pstate));
132outret:
133 return insn;
134}
135
136extern unsigned long compute_effective_address(struct pt_regs *, unsigned int, unsigned int);
137
138static void do_fault_siginfo(int code, int sig, struct pt_regs *regs,
139 unsigned int insn, int fault_code)
140{
141 siginfo_t info;
142
143 info.si_code = code;
144 info.si_signo = sig;
145 info.si_errno = 0;
146 if (fault_code & FAULT_CODE_ITLB)
147 info.si_addr = (void __user *) regs->tpc;
148 else
149 info.si_addr = (void __user *)
150 compute_effective_address(regs, insn, 0);
151 info.si_trapno = 0;
152 force_sig_info(sig, &info, current);
153}
154
155extern int handle_ldf_stq(u32, struct pt_regs *);
156extern int handle_ld_nf(u32, struct pt_regs *);
157
158static unsigned int get_fault_insn(struct pt_regs *regs, unsigned int insn)
159{
160 if (!insn) {
161 if (!regs->tpc || (regs->tpc & 0x3))
162 return 0;
163 if (regs->tstate & TSTATE_PRIV) {
164 insn = *(unsigned int *) regs->tpc;
165 } else {
166 insn = get_user_insn(regs->tpc);
167 }
168 }
169 return insn;
170}
171
172static void do_kernel_fault(struct pt_regs *regs, int si_code, int fault_code,
173 unsigned int insn, unsigned long address)
174{
175 unsigned char asi = ASI_P;
176
177 if ((!insn) && (regs->tstate & TSTATE_PRIV))
178 goto cannot_handle;
179
180 /* If user insn could be read (thus insn is zero), that
181 * is fine. We will just gun down the process with a signal
182 * in that case.
183 */
184
185 if (!(fault_code & (FAULT_CODE_WRITE|FAULT_CODE_ITLB)) &&
186 (insn & 0xc0800000) == 0xc0800000) {
187 if (insn & 0x2000)
188 asi = (regs->tstate >> 24);
189 else
190 asi = (insn >> 5);
191 if ((asi & 0xf2) == 0x82) {
192 if (insn & 0x1000000) {
193 handle_ldf_stq(insn, regs);
194 } else {
195 /* This was a non-faulting load. Just clear the
196 * destination register(s) and continue with the next
197 * instruction. -jj
198 */
199 handle_ld_nf(insn, regs);
200 }
201 return;
202 }
203 }
204
205 /* Is this in ex_table? */
206 if (regs->tstate & TSTATE_PRIV) {
207 const struct exception_table_entry *entry;
208
209 entry = search_exception_tables(regs->tpc);
210 if (entry) {
211 regs->tpc = entry->fixup;
212 regs->tnpc = regs->tpc + 4;
213 return;
214 }
215 } else {
216 /* The si_code was set to make clear whether
217 * this was a SEGV_MAPERR or SEGV_ACCERR fault.
218 */
219 do_fault_siginfo(si_code, SIGSEGV, regs, insn, fault_code);
220 return;
221 }
222
223cannot_handle:
224 unhandled_fault (address, current, regs);
225}
226
227asmlinkage void __kprobes do_sparc64_fault(struct pt_regs *regs)
228{
229 struct mm_struct *mm = current->mm;
230 struct vm_area_struct *vma;
231 unsigned int insn = 0;
232 int si_code, fault_code, fault;
233 unsigned long address, mm_rss;
234
235 fault_code = get_thread_fault_code();
236
237 if (notify_page_fault(regs))
238 return;
239
240 si_code = SEGV_MAPERR;
241 address = current_thread_info()->fault_address;
242
243 if ((fault_code & FAULT_CODE_ITLB) &&
244 (fault_code & FAULT_CODE_DTLB))
245 BUG();
246
247 if (regs->tstate & TSTATE_PRIV) {
248 unsigned long tpc = regs->tpc;
249
250 /* Sanity check the PC. */
251 if ((tpc >= KERNBASE && tpc < (unsigned long) __init_end) ||
252 (tpc >= MODULES_VADDR && tpc < MODULES_END)) {
253 /* Valid, no problems... */
254 } else {
255 bad_kernel_pc(regs, address);
256 return;
257 }
258 }
259
260 /*
261 * If we're in an interrupt or have no user
262 * context, we must not take the fault..
263 */
264 if (in_atomic() || !mm)
265 goto intr_or_no_mm;
266
267 if (test_thread_flag(TIF_32BIT)) {
268 if (!(regs->tstate & TSTATE_PRIV))
269 regs->tpc &= 0xffffffff;
270 address &= 0xffffffff;
271 }
272
273 if (!down_read_trylock(&mm->mmap_sem)) {
274 if ((regs->tstate & TSTATE_PRIV) &&
275 !search_exception_tables(regs->tpc)) {
276 insn = get_fault_insn(regs, insn);
277 goto handle_kernel_fault;
278 }
279 down_read(&mm->mmap_sem);
280 }
281
282 vma = find_vma(mm, address);
283 if (!vma)
284 goto bad_area;
285
286 /* Pure DTLB misses do not tell us whether the fault causing
287 * load/store/atomic was a write or not, it only says that there
288 * was no match. So in such a case we (carefully) read the
289 * instruction to try and figure this out. It's an optimization
290 * so it's ok if we can't do this.
291 *
292 * Special hack, window spill/fill knows the exact fault type.
293 */
294 if (((fault_code &
295 (FAULT_CODE_DTLB | FAULT_CODE_WRITE | FAULT_CODE_WINFIXUP)) == FAULT_CODE_DTLB) &&
296 (vma->vm_flags & VM_WRITE) != 0) {
297 insn = get_fault_insn(regs, 0);
298 if (!insn)
299 goto continue_fault;
300 /* All loads, stores and atomics have bits 30 and 31 both set
301 * in the instruction. Bit 21 is set in all stores, but we
302 * have to avoid prefetches which also have bit 21 set.
303 */
304 if ((insn & 0xc0200000) == 0xc0200000 &&
305 (insn & 0x01780000) != 0x01680000) {
306 /* Don't bother updating thread struct value,
307 * because update_mmu_cache only cares which tlb
308 * the access came from.
309 */
310 fault_code |= FAULT_CODE_WRITE;
311 }
312 }
313continue_fault:
314
315 if (vma->vm_start <= address)
316 goto good_area;
317 if (!(vma->vm_flags & VM_GROWSDOWN))
318 goto bad_area;
319 if (!(fault_code & FAULT_CODE_WRITE)) {
320 /* Non-faulting loads shouldn't expand stack. */
321 insn = get_fault_insn(regs, insn);
322 if ((insn & 0xc0800000) == 0xc0800000) {
323 unsigned char asi;
324
325 if (insn & 0x2000)
326 asi = (regs->tstate >> 24);
327 else
328 asi = (insn >> 5);
329 if ((asi & 0xf2) == 0x82)
330 goto bad_area;
331 }
332 }
333 if (expand_stack(vma, address))
334 goto bad_area;
335 /*
336 * Ok, we have a good vm_area for this memory access, so
337 * we can handle it..
338 */
339good_area:
340 si_code = SEGV_ACCERR;
341
342 /* If we took a ITLB miss on a non-executable page, catch
343 * that here.
344 */
345 if ((fault_code & FAULT_CODE_ITLB) && !(vma->vm_flags & VM_EXEC)) {
346 BUG_ON(address != regs->tpc);
347 BUG_ON(regs->tstate & TSTATE_PRIV);
348 goto bad_area;
349 }
350
351 if (fault_code & FAULT_CODE_WRITE) {
352 if (!(vma->vm_flags & VM_WRITE))
353 goto bad_area;
354
355 /* Spitfire has an icache which does not snoop
356 * processor stores. Later processors do...
357 */
358 if (tlb_type == spitfire &&
359 (vma->vm_flags & VM_EXEC) != 0 &&
360 vma->vm_file != NULL)
361 set_thread_fault_code(fault_code |
362 FAULT_CODE_BLKCOMMIT);
363 } else {
364 /* Allow reads even for write-only mappings */
365 if (!(vma->vm_flags & (VM_READ | VM_EXEC)))
366 goto bad_area;
367 }
368
369 fault = handle_mm_fault(mm, vma, address, (fault_code & FAULT_CODE_WRITE));
370 if (unlikely(fault & VM_FAULT_ERROR)) {
371 if (fault & VM_FAULT_OOM)
372 goto out_of_memory;
373 else if (fault & VM_FAULT_SIGBUS)
374 goto do_sigbus;
375 BUG();
376 }
377 if (fault & VM_FAULT_MAJOR)
378 current->maj_flt++;
379 else
380 current->min_flt++;
381
382 up_read(&mm->mmap_sem);
383
384 mm_rss = get_mm_rss(mm);
385#ifdef CONFIG_HUGETLB_PAGE
386 mm_rss -= (mm->context.huge_pte_count * (HPAGE_SIZE / PAGE_SIZE));
387#endif
388 if (unlikely(mm_rss >
389 mm->context.tsb_block[MM_TSB_BASE].tsb_rss_limit))
390 tsb_grow(mm, MM_TSB_BASE, mm_rss);
391#ifdef CONFIG_HUGETLB_PAGE
392 mm_rss = mm->context.huge_pte_count;
393 if (unlikely(mm_rss >
394 mm->context.tsb_block[MM_TSB_HUGE].tsb_rss_limit))
395 tsb_grow(mm, MM_TSB_HUGE, mm_rss);
396#endif
397 return;
398
399 /*
400 * Something tried to access memory that isn't in our memory map..
401 * Fix it, but check if it's kernel or user first..
402 */
403bad_area:
404 insn = get_fault_insn(regs, insn);
405 up_read(&mm->mmap_sem);
406
407handle_kernel_fault:
408 do_kernel_fault(regs, si_code, fault_code, insn, address);
409 return;
410
411/*
412 * We ran out of memory, or some other thing happened to us that made
413 * us unable to handle the page fault gracefully.
414 */
415out_of_memory:
416 insn = get_fault_insn(regs, insn);
417 up_read(&mm->mmap_sem);
418 printk("VM: killing process %s\n", current->comm);
419 if (!(regs->tstate & TSTATE_PRIV))
420 do_group_exit(SIGKILL);
421 goto handle_kernel_fault;
422
423intr_or_no_mm:
424 insn = get_fault_insn(regs, 0);
425 goto handle_kernel_fault;
426
427do_sigbus:
428 insn = get_fault_insn(regs, insn);
429 up_read(&mm->mmap_sem);
430
431 /*
432 * Send a sigbus, regardless of whether we were in kernel
433 * or user mode.
434 */
435 do_fault_siginfo(BUS_ADRERR, SIGBUS, regs, insn, fault_code);
436
437 /* Kernel mode? Handle exceptions or die */
438 if (regs->tstate & TSTATE_PRIV)
439 goto handle_kernel_fault;
440}
diff --git a/arch/sparc/mm/generic_64.c b/arch/sparc/mm/generic_64.c
new file mode 100644
index 000000000000..f362c2037013
--- /dev/null
+++ b/arch/sparc/mm/generic_64.c
@@ -0,0 +1,163 @@
1/*
2 * generic.c: Generic Sparc mm routines that are not dependent upon
3 * MMU type but are Sparc specific.
4 *
5 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
6 */
7
8#include <linux/kernel.h>
9#include <linux/mm.h>
10#include <linux/swap.h>
11#include <linux/pagemap.h>
12
13#include <asm/pgalloc.h>
14#include <asm/pgtable.h>
15#include <asm/page.h>
16#include <asm/tlbflush.h>
17
18/* Remap IO memory, the same way as remap_pfn_range(), but use
19 * the obio memory space.
20 *
21 * They use a pgprot that sets PAGE_IO and does not check the
22 * mem_map table as this is independent of normal memory.
23 */
24static inline void io_remap_pte_range(struct mm_struct *mm, pte_t * pte,
25 unsigned long address,
26 unsigned long size,
27 unsigned long offset, pgprot_t prot,
28 int space)
29{
30 unsigned long end;
31
32 /* clear hack bit that was used as a write_combine side-effect flag */
33 offset &= ~0x1UL;
34 address &= ~PMD_MASK;
35 end = address + size;
36 if (end > PMD_SIZE)
37 end = PMD_SIZE;
38 do {
39 pte_t entry;
40 unsigned long curend = address + PAGE_SIZE;
41
42 entry = mk_pte_io(offset, prot, space, PAGE_SIZE);
43 if (!(address & 0xffff)) {
44 if (PAGE_SIZE < (4 * 1024 * 1024) &&
45 !(address & 0x3fffff) &&
46 !(offset & 0x3ffffe) &&
47 end >= address + 0x400000) {
48 entry = mk_pte_io(offset, prot, space,
49 4 * 1024 * 1024);
50 curend = address + 0x400000;
51 offset += 0x400000;
52 } else if (PAGE_SIZE < (512 * 1024) &&
53 !(address & 0x7ffff) &&
54 !(offset & 0x7fffe) &&
55 end >= address + 0x80000) {
56 entry = mk_pte_io(offset, prot, space,
57 512 * 1024 * 1024);
58 curend = address + 0x80000;
59 offset += 0x80000;
60 } else if (PAGE_SIZE < (64 * 1024) &&
61 !(offset & 0xfffe) &&
62 end >= address + 0x10000) {
63 entry = mk_pte_io(offset, prot, space,
64 64 * 1024);
65 curend = address + 0x10000;
66 offset += 0x10000;
67 } else
68 offset += PAGE_SIZE;
69 } else
70 offset += PAGE_SIZE;
71
72 if (pte_write(entry))
73 entry = pte_mkdirty(entry);
74 do {
75 BUG_ON(!pte_none(*pte));
76 set_pte_at(mm, address, pte, entry);
77 address += PAGE_SIZE;
78 pte_val(entry) += PAGE_SIZE;
79 pte++;
80 } while (address < curend);
81 } while (address < end);
82}
83
84static inline int io_remap_pmd_range(struct mm_struct *mm, pmd_t * pmd, unsigned long address, unsigned long size,
85 unsigned long offset, pgprot_t prot, int space)
86{
87 unsigned long end;
88
89 address &= ~PGDIR_MASK;
90 end = address + size;
91 if (end > PGDIR_SIZE)
92 end = PGDIR_SIZE;
93 offset -= address;
94 do {
95 pte_t * pte = pte_alloc_map(mm, pmd, address);
96 if (!pte)
97 return -ENOMEM;
98 io_remap_pte_range(mm, pte, address, end - address, address + offset, prot, space);
99 pte_unmap(pte);
100 address = (address + PMD_SIZE) & PMD_MASK;
101 pmd++;
102 } while (address < end);
103 return 0;
104}
105
106static inline int io_remap_pud_range(struct mm_struct *mm, pud_t * pud, unsigned long address, unsigned long size,
107 unsigned long offset, pgprot_t prot, int space)
108{
109 unsigned long end;
110
111 address &= ~PUD_MASK;
112 end = address + size;
113 if (end > PUD_SIZE)
114 end = PUD_SIZE;
115 offset -= address;
116 do {
117 pmd_t *pmd = pmd_alloc(mm, pud, address);
118 if (!pud)
119 return -ENOMEM;
120 io_remap_pmd_range(mm, pmd, address, end - address, address + offset, prot, space);
121 address = (address + PUD_SIZE) & PUD_MASK;
122 pud++;
123 } while (address < end);
124 return 0;
125}
126
127int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
128 unsigned long pfn, unsigned long size, pgprot_t prot)
129{
130 int error = 0;
131 pgd_t * dir;
132 unsigned long beg = from;
133 unsigned long end = from + size;
134 struct mm_struct *mm = vma->vm_mm;
135 int space = GET_IOSPACE(pfn);
136 unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT;
137 unsigned long phys_base;
138
139 phys_base = offset | (((unsigned long) space) << 32UL);
140
141 /* See comment in mm/memory.c remap_pfn_range */
142 vma->vm_flags |= VM_IO | VM_RESERVED | VM_PFNMAP;
143 vma->vm_pgoff = phys_base >> PAGE_SHIFT;
144
145 offset -= from;
146 dir = pgd_offset(mm, from);
147 flush_cache_range(vma, beg, end);
148
149 while (from < end) {
150 pud_t *pud = pud_alloc(mm, dir, from);
151 error = -ENOMEM;
152 if (!pud)
153 break;
154 error = io_remap_pud_range(mm, pud, from, end - from, offset + from, prot, space);
155 if (error)
156 break;
157 from = (from + PGDIR_SIZE) & PGDIR_MASK;
158 dir++;
159 }
160
161 flush_tlb_range(vma, beg, end);
162 return error;
163}
diff --git a/arch/sparc/mm/hugetlbpage.c b/arch/sparc/mm/hugetlbpage.c
new file mode 100644
index 000000000000..f27d10369e0c
--- /dev/null
+++ b/arch/sparc/mm/hugetlbpage.c
@@ -0,0 +1,357 @@
1/*
2 * SPARC64 Huge TLB page support.
3 *
4 * Copyright (C) 2002, 2003, 2006 David S. Miller (davem@davemloft.net)
5 */
6
7#include <linux/init.h>
8#include <linux/module.h>
9#include <linux/fs.h>
10#include <linux/mm.h>
11#include <linux/hugetlb.h>
12#include <linux/pagemap.h>
13#include <linux/slab.h>
14#include <linux/sysctl.h>
15
16#include <asm/mman.h>
17#include <asm/pgalloc.h>
18#include <asm/tlb.h>
19#include <asm/tlbflush.h>
20#include <asm/cacheflush.h>
21#include <asm/mmu_context.h>
22
23/* Slightly simplified from the non-hugepage variant because by
24 * definition we don't have to worry about any page coloring stuff
25 */
26#define VA_EXCLUDE_START (0x0000080000000000UL - (1UL << 32UL))
27#define VA_EXCLUDE_END (0xfffff80000000000UL + (1UL << 32UL))
28
29static unsigned long hugetlb_get_unmapped_area_bottomup(struct file *filp,
30 unsigned long addr,
31 unsigned long len,
32 unsigned long pgoff,
33 unsigned long flags)
34{
35 struct mm_struct *mm = current->mm;
36 struct vm_area_struct * vma;
37 unsigned long task_size = TASK_SIZE;
38 unsigned long start_addr;
39
40 if (test_thread_flag(TIF_32BIT))
41 task_size = STACK_TOP32;
42 if (unlikely(len >= VA_EXCLUDE_START))
43 return -ENOMEM;
44
45 if (len > mm->cached_hole_size) {
46 start_addr = addr = mm->free_area_cache;
47 } else {
48 start_addr = addr = TASK_UNMAPPED_BASE;
49 mm->cached_hole_size = 0;
50 }
51
52 task_size -= len;
53
54full_search:
55 addr = ALIGN(addr, HPAGE_SIZE);
56
57 for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
58 /* At this point: (!vma || addr < vma->vm_end). */
59 if (addr < VA_EXCLUDE_START &&
60 (addr + len) >= VA_EXCLUDE_START) {
61 addr = VA_EXCLUDE_END;
62 vma = find_vma(mm, VA_EXCLUDE_END);
63 }
64 if (unlikely(task_size < addr)) {
65 if (start_addr != TASK_UNMAPPED_BASE) {
66 start_addr = addr = TASK_UNMAPPED_BASE;
67 mm->cached_hole_size = 0;
68 goto full_search;
69 }
70 return -ENOMEM;
71 }
72 if (likely(!vma || addr + len <= vma->vm_start)) {
73 /*
74 * Remember the place where we stopped the search:
75 */
76 mm->free_area_cache = addr + len;
77 return addr;
78 }
79 if (addr + mm->cached_hole_size < vma->vm_start)
80 mm->cached_hole_size = vma->vm_start - addr;
81
82 addr = ALIGN(vma->vm_end, HPAGE_SIZE);
83 }
84}
85
86static unsigned long
87hugetlb_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
88 const unsigned long len,
89 const unsigned long pgoff,
90 const unsigned long flags)
91{
92 struct vm_area_struct *vma;
93 struct mm_struct *mm = current->mm;
94 unsigned long addr = addr0;
95
96 /* This should only ever run for 32-bit processes. */
97 BUG_ON(!test_thread_flag(TIF_32BIT));
98
99 /* check if free_area_cache is useful for us */
100 if (len <= mm->cached_hole_size) {
101 mm->cached_hole_size = 0;
102 mm->free_area_cache = mm->mmap_base;
103 }
104
105 /* either no address requested or can't fit in requested address hole */
106 addr = mm->free_area_cache & HPAGE_MASK;
107
108 /* make sure it can fit in the remaining address space */
109 if (likely(addr > len)) {
110 vma = find_vma(mm, addr-len);
111 if (!vma || addr <= vma->vm_start) {
112 /* remember the address as a hint for next time */
113 return (mm->free_area_cache = addr-len);
114 }
115 }
116
117 if (unlikely(mm->mmap_base < len))
118 goto bottomup;
119
120 addr = (mm->mmap_base-len) & HPAGE_MASK;
121
122 do {
123 /*
124 * Lookup failure means no vma is above this address,
125 * else if new region fits below vma->vm_start,
126 * return with success:
127 */
128 vma = find_vma(mm, addr);
129 if (likely(!vma || addr+len <= vma->vm_start)) {
130 /* remember the address as a hint for next time */
131 return (mm->free_area_cache = addr);
132 }
133
134 /* remember the largest hole we saw so far */
135 if (addr + mm->cached_hole_size < vma->vm_start)
136 mm->cached_hole_size = vma->vm_start - addr;
137
138 /* try just below the current vma->vm_start */
139 addr = (vma->vm_start-len) & HPAGE_MASK;
140 } while (likely(len < vma->vm_start));
141
142bottomup:
143 /*
144 * A failed mmap() very likely causes application failure,
145 * so fall back to the bottom-up function here. This scenario
146 * can happen with large stack limits and large mmap()
147 * allocations.
148 */
149 mm->cached_hole_size = ~0UL;
150 mm->free_area_cache = TASK_UNMAPPED_BASE;
151 addr = arch_get_unmapped_area(filp, addr0, len, pgoff, flags);
152 /*
153 * Restore the topdown base:
154 */
155 mm->free_area_cache = mm->mmap_base;
156 mm->cached_hole_size = ~0UL;
157
158 return addr;
159}
160
161unsigned long
162hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
163 unsigned long len, unsigned long pgoff, unsigned long flags)
164{
165 struct mm_struct *mm = current->mm;
166 struct vm_area_struct *vma;
167 unsigned long task_size = TASK_SIZE;
168
169 if (test_thread_flag(TIF_32BIT))
170 task_size = STACK_TOP32;
171
172 if (len & ~HPAGE_MASK)
173 return -EINVAL;
174 if (len > task_size)
175 return -ENOMEM;
176
177 if (flags & MAP_FIXED) {
178 if (prepare_hugepage_range(file, addr, len))
179 return -EINVAL;
180 return addr;
181 }
182
183 if (addr) {
184 addr = ALIGN(addr, HPAGE_SIZE);
185 vma = find_vma(mm, addr);
186 if (task_size - len >= addr &&
187 (!vma || addr + len <= vma->vm_start))
188 return addr;
189 }
190 if (mm->get_unmapped_area == arch_get_unmapped_area)
191 return hugetlb_get_unmapped_area_bottomup(file, addr, len,
192 pgoff, flags);
193 else
194 return hugetlb_get_unmapped_area_topdown(file, addr, len,
195 pgoff, flags);
196}
197
198pte_t *huge_pte_alloc(struct mm_struct *mm,
199 unsigned long addr, unsigned long sz)
200{
201 pgd_t *pgd;
202 pud_t *pud;
203 pmd_t *pmd;
204 pte_t *pte = NULL;
205
206 /* We must align the address, because our caller will run
207 * set_huge_pte_at() on whatever we return, which writes out
208 * all of the sub-ptes for the hugepage range. So we have
209 * to give it the first such sub-pte.
210 */
211 addr &= HPAGE_MASK;
212
213 pgd = pgd_offset(mm, addr);
214 pud = pud_alloc(mm, pgd, addr);
215 if (pud) {
216 pmd = pmd_alloc(mm, pud, addr);
217 if (pmd)
218 pte = pte_alloc_map(mm, pmd, addr);
219 }
220 return pte;
221}
222
223pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
224{
225 pgd_t *pgd;
226 pud_t *pud;
227 pmd_t *pmd;
228 pte_t *pte = NULL;
229
230 addr &= HPAGE_MASK;
231
232 pgd = pgd_offset(mm, addr);
233 if (!pgd_none(*pgd)) {
234 pud = pud_offset(pgd, addr);
235 if (!pud_none(*pud)) {
236 pmd = pmd_offset(pud, addr);
237 if (!pmd_none(*pmd))
238 pte = pte_offset_map(pmd, addr);
239 }
240 }
241 return pte;
242}
243
244int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
245{
246 return 0;
247}
248
249void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
250 pte_t *ptep, pte_t entry)
251{
252 int i;
253
254 if (!pte_present(*ptep) && pte_present(entry))
255 mm->context.huge_pte_count++;
256
257 addr &= HPAGE_MASK;
258 for (i = 0; i < (1 << HUGETLB_PAGE_ORDER); i++) {
259 set_pte_at(mm, addr, ptep, entry);
260 ptep++;
261 addr += PAGE_SIZE;
262 pte_val(entry) += PAGE_SIZE;
263 }
264}
265
266pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
267 pte_t *ptep)
268{
269 pte_t entry;
270 int i;
271
272 entry = *ptep;
273 if (pte_present(entry))
274 mm->context.huge_pte_count--;
275
276 addr &= HPAGE_MASK;
277
278 for (i = 0; i < (1 << HUGETLB_PAGE_ORDER); i++) {
279 pte_clear(mm, addr, ptep);
280 addr += PAGE_SIZE;
281 ptep++;
282 }
283
284 return entry;
285}
286
287struct page *follow_huge_addr(struct mm_struct *mm,
288 unsigned long address, int write)
289{
290 return ERR_PTR(-EINVAL);
291}
292
293int pmd_huge(pmd_t pmd)
294{
295 return 0;
296}
297
298int pud_huge(pud_t pud)
299{
300 return 0;
301}
302
303struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
304 pmd_t *pmd, int write)
305{
306 return NULL;
307}
308
309static void context_reload(void *__data)
310{
311 struct mm_struct *mm = __data;
312
313 if (mm == current->mm)
314 load_secondary_context(mm);
315}
316
317void hugetlb_prefault_arch_hook(struct mm_struct *mm)
318{
319 struct tsb_config *tp = &mm->context.tsb_block[MM_TSB_HUGE];
320
321 if (likely(tp->tsb != NULL))
322 return;
323
324 tsb_grow(mm, MM_TSB_HUGE, 0);
325 tsb_context_switch(mm);
326 smp_tsb_sync(mm);
327
328 /* On UltraSPARC-III+ and later, configure the second half of
329 * the Data-TLB for huge pages.
330 */
331 if (tlb_type == cheetah_plus) {
332 unsigned long ctx;
333
334 spin_lock(&ctx_alloc_lock);
335 ctx = mm->context.sparc64_ctx_val;
336 ctx &= ~CTX_PGSZ_MASK;
337 ctx |= CTX_PGSZ_BASE << CTX_PGSZ0_SHIFT;
338 ctx |= CTX_PGSZ_HUGE << CTX_PGSZ1_SHIFT;
339
340 if (ctx != mm->context.sparc64_ctx_val) {
341 /* When changing the page size fields, we
342 * must perform a context flush so that no
343 * stale entries match. This flush must
344 * occur with the original context register
345 * settings.
346 */
347 do_flush_tlb_mm(mm);
348
349 /* Reload the context register of all processors
350 * also executing in this address space.
351 */
352 mm->context.sparc64_ctx_val = ctx;
353 on_each_cpu(context_reload, mm, 0);
354 }
355 spin_unlock(&ctx_alloc_lock);
356 }
357}
diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
new file mode 100644
index 000000000000..6ea73da29312
--- /dev/null
+++ b/arch/sparc/mm/init_64.c
@@ -0,0 +1,2360 @@
1/*
2 * arch/sparc64/mm/init.c
3 *
4 * Copyright (C) 1996-1999 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 1997-1999 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
6 */
7
8#include <linux/module.h>
9#include <linux/kernel.h>
10#include <linux/sched.h>
11#include <linux/string.h>
12#include <linux/init.h>
13#include <linux/bootmem.h>
14#include <linux/mm.h>
15#include <linux/hugetlb.h>
16#include <linux/slab.h>
17#include <linux/initrd.h>
18#include <linux/swap.h>
19#include <linux/pagemap.h>
20#include <linux/poison.h>
21#include <linux/fs.h>
22#include <linux/seq_file.h>
23#include <linux/kprobes.h>
24#include <linux/cache.h>
25#include <linux/sort.h>
26#include <linux/percpu.h>
27#include <linux/lmb.h>
28#include <linux/mmzone.h>
29
30#include <asm/head.h>
31#include <asm/system.h>
32#include <asm/page.h>
33#include <asm/pgalloc.h>
34#include <asm/pgtable.h>
35#include <asm/oplib.h>
36#include <asm/iommu.h>
37#include <asm/io.h>
38#include <asm/uaccess.h>
39#include <asm/mmu_context.h>
40#include <asm/tlbflush.h>
41#include <asm/dma.h>
42#include <asm/starfire.h>
43#include <asm/tlb.h>
44#include <asm/spitfire.h>
45#include <asm/sections.h>
46#include <asm/tsb.h>
47#include <asm/hypervisor.h>
48#include <asm/prom.h>
49#include <asm/mdesc.h>
50#include <asm/cpudata.h>
51#include <asm/irq.h>
52
53#include "init_64.h"
54
55unsigned long kern_linear_pte_xor[2] __read_mostly;
56
57/* A bitmap, one bit for every 256MB of physical memory. If the bit
58 * is clear, we should use a 4MB page (via kern_linear_pte_xor[0]) else
59 * if set we should use a 256MB page (via kern_linear_pte_xor[1]).
60 */
61unsigned long kpte_linear_bitmap[KPTE_BITMAP_BYTES / sizeof(unsigned long)];
62
63#ifndef CONFIG_DEBUG_PAGEALLOC
64/* A special kernel TSB for 4MB and 256MB linear mappings.
65 * Space is allocated for this right after the trap table
66 * in arch/sparc64/kernel/head.S
67 */
68extern struct tsb swapper_4m_tsb[KERNEL_TSB4M_NENTRIES];
69#endif
70
71#define MAX_BANKS 32
72
73static struct linux_prom64_registers pavail[MAX_BANKS] __initdata;
74static int pavail_ents __initdata;
75
76static int cmp_p64(const void *a, const void *b)
77{
78 const struct linux_prom64_registers *x = a, *y = b;
79
80 if (x->phys_addr > y->phys_addr)
81 return 1;
82 if (x->phys_addr < y->phys_addr)
83 return -1;
84 return 0;
85}
86
87static void __init read_obp_memory(const char *property,
88 struct linux_prom64_registers *regs,
89 int *num_ents)
90{
91 int node = prom_finddevice("/memory");
92 int prop_size = prom_getproplen(node, property);
93 int ents, ret, i;
94
95 ents = prop_size / sizeof(struct linux_prom64_registers);
96 if (ents > MAX_BANKS) {
97 prom_printf("The machine has more %s property entries than "
98 "this kernel can support (%d).\n",
99 property, MAX_BANKS);
100 prom_halt();
101 }
102
103 ret = prom_getproperty(node, property, (char *) regs, prop_size);
104 if (ret == -1) {
105 prom_printf("Couldn't get %s property from /memory.\n");
106 prom_halt();
107 }
108
109 /* Sanitize what we got from the firmware, by page aligning
110 * everything.
111 */
112 for (i = 0; i < ents; i++) {
113 unsigned long base, size;
114
115 base = regs[i].phys_addr;
116 size = regs[i].reg_size;
117
118 size &= PAGE_MASK;
119 if (base & ~PAGE_MASK) {
120 unsigned long new_base = PAGE_ALIGN(base);
121
122 size -= new_base - base;
123 if ((long) size < 0L)
124 size = 0UL;
125 base = new_base;
126 }
127 if (size == 0UL) {
128 /* If it is empty, simply get rid of it.
129 * This simplifies the logic of the other
130 * functions that process these arrays.
131 */
132 memmove(&regs[i], &regs[i + 1],
133 (ents - i - 1) * sizeof(regs[0]));
134 i--;
135 ents--;
136 continue;
137 }
138 regs[i].phys_addr = base;
139 regs[i].reg_size = size;
140 }
141
142 *num_ents = ents;
143
144 sort(regs, ents, sizeof(struct linux_prom64_registers),
145 cmp_p64, NULL);
146}
147
148unsigned long *sparc64_valid_addr_bitmap __read_mostly;
149
150/* Kernel physical address base and size in bytes. */
151unsigned long kern_base __read_mostly;
152unsigned long kern_size __read_mostly;
153
154/* Initial ramdisk setup */
155extern unsigned long sparc_ramdisk_image64;
156extern unsigned int sparc_ramdisk_image;
157extern unsigned int sparc_ramdisk_size;
158
159struct page *mem_map_zero __read_mostly;
160EXPORT_SYMBOL(mem_map_zero);
161
162unsigned int sparc64_highest_unlocked_tlb_ent __read_mostly;
163
164unsigned long sparc64_kern_pri_context __read_mostly;
165unsigned long sparc64_kern_pri_nuc_bits __read_mostly;
166unsigned long sparc64_kern_sec_context __read_mostly;
167
168int num_kernel_image_mappings;
169
170#ifdef CONFIG_DEBUG_DCFLUSH
171atomic_t dcpage_flushes = ATOMIC_INIT(0);
172#ifdef CONFIG_SMP
173atomic_t dcpage_flushes_xcall = ATOMIC_INIT(0);
174#endif
175#endif
176
177inline void flush_dcache_page_impl(struct page *page)
178{
179 BUG_ON(tlb_type == hypervisor);
180#ifdef CONFIG_DEBUG_DCFLUSH
181 atomic_inc(&dcpage_flushes);
182#endif
183
184#ifdef DCACHE_ALIASING_POSSIBLE
185 __flush_dcache_page(page_address(page),
186 ((tlb_type == spitfire) &&
187 page_mapping(page) != NULL));
188#else
189 if (page_mapping(page) != NULL &&
190 tlb_type == spitfire)
191 __flush_icache_page(__pa(page_address(page)));
192#endif
193}
194
195#define PG_dcache_dirty PG_arch_1
196#define PG_dcache_cpu_shift 32UL
197#define PG_dcache_cpu_mask \
198 ((1UL<<ilog2(roundup_pow_of_two(NR_CPUS)))-1UL)
199
200#define dcache_dirty_cpu(page) \
201 (((page)->flags >> PG_dcache_cpu_shift) & PG_dcache_cpu_mask)
202
203static inline void set_dcache_dirty(struct page *page, int this_cpu)
204{
205 unsigned long mask = this_cpu;
206 unsigned long non_cpu_bits;
207
208 non_cpu_bits = ~(PG_dcache_cpu_mask << PG_dcache_cpu_shift);
209 mask = (mask << PG_dcache_cpu_shift) | (1UL << PG_dcache_dirty);
210
211 __asm__ __volatile__("1:\n\t"
212 "ldx [%2], %%g7\n\t"
213 "and %%g7, %1, %%g1\n\t"
214 "or %%g1, %0, %%g1\n\t"
215 "casx [%2], %%g7, %%g1\n\t"
216 "cmp %%g7, %%g1\n\t"
217 "bne,pn %%xcc, 1b\n\t"
218 " nop"
219 : /* no outputs */
220 : "r" (mask), "r" (non_cpu_bits), "r" (&page->flags)
221 : "g1", "g7");
222}
223
224static inline void clear_dcache_dirty_cpu(struct page *page, unsigned long cpu)
225{
226 unsigned long mask = (1UL << PG_dcache_dirty);
227
228 __asm__ __volatile__("! test_and_clear_dcache_dirty\n"
229 "1:\n\t"
230 "ldx [%2], %%g7\n\t"
231 "srlx %%g7, %4, %%g1\n\t"
232 "and %%g1, %3, %%g1\n\t"
233 "cmp %%g1, %0\n\t"
234 "bne,pn %%icc, 2f\n\t"
235 " andn %%g7, %1, %%g1\n\t"
236 "casx [%2], %%g7, %%g1\n\t"
237 "cmp %%g7, %%g1\n\t"
238 "bne,pn %%xcc, 1b\n\t"
239 " nop\n"
240 "2:"
241 : /* no outputs */
242 : "r" (cpu), "r" (mask), "r" (&page->flags),
243 "i" (PG_dcache_cpu_mask),
244 "i" (PG_dcache_cpu_shift)
245 : "g1", "g7");
246}
247
248static inline void tsb_insert(struct tsb *ent, unsigned long tag, unsigned long pte)
249{
250 unsigned long tsb_addr = (unsigned long) ent;
251
252 if (tlb_type == cheetah_plus || tlb_type == hypervisor)
253 tsb_addr = __pa(tsb_addr);
254
255 __tsb_insert(tsb_addr, tag, pte);
256}
257
258unsigned long _PAGE_ALL_SZ_BITS __read_mostly;
259unsigned long _PAGE_SZBITS __read_mostly;
260
261void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t pte)
262{
263 struct mm_struct *mm;
264 struct tsb *tsb;
265 unsigned long tag, flags;
266 unsigned long tsb_index, tsb_hash_shift;
267
268 if (tlb_type != hypervisor) {
269 unsigned long pfn = pte_pfn(pte);
270 unsigned long pg_flags;
271 struct page *page;
272
273 if (pfn_valid(pfn) &&
274 (page = pfn_to_page(pfn), page_mapping(page)) &&
275 ((pg_flags = page->flags) & (1UL << PG_dcache_dirty))) {
276 int cpu = ((pg_flags >> PG_dcache_cpu_shift) &
277 PG_dcache_cpu_mask);
278 int this_cpu = get_cpu();
279
280 /* This is just to optimize away some function calls
281 * in the SMP case.
282 */
283 if (cpu == this_cpu)
284 flush_dcache_page_impl(page);
285 else
286 smp_flush_dcache_page_impl(page, cpu);
287
288 clear_dcache_dirty_cpu(page, cpu);
289
290 put_cpu();
291 }
292 }
293
294 mm = vma->vm_mm;
295
296 tsb_index = MM_TSB_BASE;
297 tsb_hash_shift = PAGE_SHIFT;
298
299 spin_lock_irqsave(&mm->context.lock, flags);
300
301#ifdef CONFIG_HUGETLB_PAGE
302 if (mm->context.tsb_block[MM_TSB_HUGE].tsb != NULL) {
303 if ((tlb_type == hypervisor &&
304 (pte_val(pte) & _PAGE_SZALL_4V) == _PAGE_SZHUGE_4V) ||
305 (tlb_type != hypervisor &&
306 (pte_val(pte) & _PAGE_SZALL_4U) == _PAGE_SZHUGE_4U)) {
307 tsb_index = MM_TSB_HUGE;
308 tsb_hash_shift = HPAGE_SHIFT;
309 }
310 }
311#endif
312
313 tsb = mm->context.tsb_block[tsb_index].tsb;
314 tsb += ((address >> tsb_hash_shift) &
315 (mm->context.tsb_block[tsb_index].tsb_nentries - 1UL));
316 tag = (address >> 22UL);
317 tsb_insert(tsb, tag, pte_val(pte));
318
319 spin_unlock_irqrestore(&mm->context.lock, flags);
320}
321
322void flush_dcache_page(struct page *page)
323{
324 struct address_space *mapping;
325 int this_cpu;
326
327 if (tlb_type == hypervisor)
328 return;
329
330 /* Do not bother with the expensive D-cache flush if it
331 * is merely the zero page. The 'bigcore' testcase in GDB
332 * causes this case to run millions of times.
333 */
334 if (page == ZERO_PAGE(0))
335 return;
336
337 this_cpu = get_cpu();
338
339 mapping = page_mapping(page);
340 if (mapping && !mapping_mapped(mapping)) {
341 int dirty = test_bit(PG_dcache_dirty, &page->flags);
342 if (dirty) {
343 int dirty_cpu = dcache_dirty_cpu(page);
344
345 if (dirty_cpu == this_cpu)
346 goto out;
347 smp_flush_dcache_page_impl(page, dirty_cpu);
348 }
349 set_dcache_dirty(page, this_cpu);
350 } else {
351 /* We could delay the flush for the !page_mapping
352 * case too. But that case is for exec env/arg
353 * pages and those are %99 certainly going to get
354 * faulted into the tlb (and thus flushed) anyways.
355 */
356 flush_dcache_page_impl(page);
357 }
358
359out:
360 put_cpu();
361}
362
363void __kprobes flush_icache_range(unsigned long start, unsigned long end)
364{
365 /* Cheetah and Hypervisor platform cpus have coherent I-cache. */
366 if (tlb_type == spitfire) {
367 unsigned long kaddr;
368
369 /* This code only runs on Spitfire cpus so this is
370 * why we can assume _PAGE_PADDR_4U.
371 */
372 for (kaddr = start; kaddr < end; kaddr += PAGE_SIZE) {
373 unsigned long paddr, mask = _PAGE_PADDR_4U;
374
375 if (kaddr >= PAGE_OFFSET)
376 paddr = kaddr & mask;
377 else {
378 pgd_t *pgdp = pgd_offset_k(kaddr);
379 pud_t *pudp = pud_offset(pgdp, kaddr);
380 pmd_t *pmdp = pmd_offset(pudp, kaddr);
381 pte_t *ptep = pte_offset_kernel(pmdp, kaddr);
382
383 paddr = pte_val(*ptep) & mask;
384 }
385 __flush_icache_page(paddr);
386 }
387 }
388}
389
390void mmu_info(struct seq_file *m)
391{
392 if (tlb_type == cheetah)
393 seq_printf(m, "MMU Type\t: Cheetah\n");
394 else if (tlb_type == cheetah_plus)
395 seq_printf(m, "MMU Type\t: Cheetah+\n");
396 else if (tlb_type == spitfire)
397 seq_printf(m, "MMU Type\t: Spitfire\n");
398 else if (tlb_type == hypervisor)
399 seq_printf(m, "MMU Type\t: Hypervisor (sun4v)\n");
400 else
401 seq_printf(m, "MMU Type\t: ???\n");
402
403#ifdef CONFIG_DEBUG_DCFLUSH
404 seq_printf(m, "DCPageFlushes\t: %d\n",
405 atomic_read(&dcpage_flushes));
406#ifdef CONFIG_SMP
407 seq_printf(m, "DCPageFlushesXC\t: %d\n",
408 atomic_read(&dcpage_flushes_xcall));
409#endif /* CONFIG_SMP */
410#endif /* CONFIG_DEBUG_DCFLUSH */
411}
412
413struct linux_prom_translation prom_trans[512] __read_mostly;
414unsigned int prom_trans_ents __read_mostly;
415
416unsigned long kern_locked_tte_data;
417
418/* The obp translations are saved based on 8k pagesize, since obp can
419 * use a mixture of pagesizes. Misses to the LOW_OBP_ADDRESS ->
420 * HI_OBP_ADDRESS range are handled in ktlb.S.
421 */
422static inline int in_obp_range(unsigned long vaddr)
423{
424 return (vaddr >= LOW_OBP_ADDRESS &&
425 vaddr < HI_OBP_ADDRESS);
426}
427
428static int cmp_ptrans(const void *a, const void *b)
429{
430 const struct linux_prom_translation *x = a, *y = b;
431
432 if (x->virt > y->virt)
433 return 1;
434 if (x->virt < y->virt)
435 return -1;
436 return 0;
437}
438
439/* Read OBP translations property into 'prom_trans[]'. */
440static void __init read_obp_translations(void)
441{
442 int n, node, ents, first, last, i;
443
444 node = prom_finddevice("/virtual-memory");
445 n = prom_getproplen(node, "translations");
446 if (unlikely(n == 0 || n == -1)) {
447 prom_printf("prom_mappings: Couldn't get size.\n");
448 prom_halt();
449 }
450 if (unlikely(n > sizeof(prom_trans))) {
451 prom_printf("prom_mappings: Size %Zd is too big.\n", n);
452 prom_halt();
453 }
454
455 if ((n = prom_getproperty(node, "translations",
456 (char *)&prom_trans[0],
457 sizeof(prom_trans))) == -1) {
458 prom_printf("prom_mappings: Couldn't get property.\n");
459 prom_halt();
460 }
461
462 n = n / sizeof(struct linux_prom_translation);
463
464 ents = n;
465
466 sort(prom_trans, ents, sizeof(struct linux_prom_translation),
467 cmp_ptrans, NULL);
468
469 /* Now kick out all the non-OBP entries. */
470 for (i = 0; i < ents; i++) {
471 if (in_obp_range(prom_trans[i].virt))
472 break;
473 }
474 first = i;
475 for (; i < ents; i++) {
476 if (!in_obp_range(prom_trans[i].virt))
477 break;
478 }
479 last = i;
480
481 for (i = 0; i < (last - first); i++) {
482 struct linux_prom_translation *src = &prom_trans[i + first];
483 struct linux_prom_translation *dest = &prom_trans[i];
484
485 *dest = *src;
486 }
487 for (; i < ents; i++) {
488 struct linux_prom_translation *dest = &prom_trans[i];
489 dest->virt = dest->size = dest->data = 0x0UL;
490 }
491
492 prom_trans_ents = last - first;
493
494 if (tlb_type == spitfire) {
495 /* Clear diag TTE bits. */
496 for (i = 0; i < prom_trans_ents; i++)
497 prom_trans[i].data &= ~0x0003fe0000000000UL;
498 }
499}
500
501static void __init hypervisor_tlb_lock(unsigned long vaddr,
502 unsigned long pte,
503 unsigned long mmu)
504{
505 unsigned long ret = sun4v_mmu_map_perm_addr(vaddr, 0, pte, mmu);
506
507 if (ret != 0) {
508 prom_printf("hypervisor_tlb_lock[%lx:%lx:%lx:%lx]: "
509 "errors with %lx\n", vaddr, 0, pte, mmu, ret);
510 prom_halt();
511 }
512}
513
514static unsigned long kern_large_tte(unsigned long paddr);
515
516static void __init remap_kernel(void)
517{
518 unsigned long phys_page, tte_vaddr, tte_data;
519 int i, tlb_ent = sparc64_highest_locked_tlbent();
520
521 tte_vaddr = (unsigned long) KERNBASE;
522 phys_page = (prom_boot_mapping_phys_low >> 22UL) << 22UL;
523 tte_data = kern_large_tte(phys_page);
524
525 kern_locked_tte_data = tte_data;
526
527 /* Now lock us into the TLBs via Hypervisor or OBP. */
528 if (tlb_type == hypervisor) {
529 for (i = 0; i < num_kernel_image_mappings; i++) {
530 hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_DMMU);
531 hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_IMMU);
532 tte_vaddr += 0x400000;
533 tte_data += 0x400000;
534 }
535 } else {
536 for (i = 0; i < num_kernel_image_mappings; i++) {
537 prom_dtlb_load(tlb_ent - i, tte_data, tte_vaddr);
538 prom_itlb_load(tlb_ent - i, tte_data, tte_vaddr);
539 tte_vaddr += 0x400000;
540 tte_data += 0x400000;
541 }
542 sparc64_highest_unlocked_tlb_ent = tlb_ent - i;
543 }
544 if (tlb_type == cheetah_plus) {
545 sparc64_kern_pri_context = (CTX_CHEETAH_PLUS_CTX0 |
546 CTX_CHEETAH_PLUS_NUC);
547 sparc64_kern_pri_nuc_bits = CTX_CHEETAH_PLUS_NUC;
548 sparc64_kern_sec_context = CTX_CHEETAH_PLUS_CTX0;
549 }
550}
551
552
553static void __init inherit_prom_mappings(void)
554{
555 /* Now fixup OBP's idea about where we really are mapped. */
556 printk("Remapping the kernel... ");
557 remap_kernel();
558 printk("done.\n");
559}
560
561void prom_world(int enter)
562{
563 if (!enter)
564 set_fs((mm_segment_t) { get_thread_current_ds() });
565
566 __asm__ __volatile__("flushw");
567}
568
569void __flush_dcache_range(unsigned long start, unsigned long end)
570{
571 unsigned long va;
572
573 if (tlb_type == spitfire) {
574 int n = 0;
575
576 for (va = start; va < end; va += 32) {
577 spitfire_put_dcache_tag(va & 0x3fe0, 0x0);
578 if (++n >= 512)
579 break;
580 }
581 } else if (tlb_type == cheetah || tlb_type == cheetah_plus) {
582 start = __pa(start);
583 end = __pa(end);
584 for (va = start; va < end; va += 32)
585 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
586 "membar #Sync"
587 : /* no outputs */
588 : "r" (va),
589 "i" (ASI_DCACHE_INVALIDATE));
590 }
591}
592
593/* get_new_mmu_context() uses "cache + 1". */
594DEFINE_SPINLOCK(ctx_alloc_lock);
595unsigned long tlb_context_cache = CTX_FIRST_VERSION - 1;
596#define MAX_CTX_NR (1UL << CTX_NR_BITS)
597#define CTX_BMAP_SLOTS BITS_TO_LONGS(MAX_CTX_NR)
598DECLARE_BITMAP(mmu_context_bmap, MAX_CTX_NR);
599
600/* Caller does TLB context flushing on local CPU if necessary.
601 * The caller also ensures that CTX_VALID(mm->context) is false.
602 *
603 * We must be careful about boundary cases so that we never
604 * let the user have CTX 0 (nucleus) or we ever use a CTX
605 * version of zero (and thus NO_CONTEXT would not be caught
606 * by version mis-match tests in mmu_context.h).
607 *
608 * Always invoked with interrupts disabled.
609 */
610void get_new_mmu_context(struct mm_struct *mm)
611{
612 unsigned long ctx, new_ctx;
613 unsigned long orig_pgsz_bits;
614 unsigned long flags;
615 int new_version;
616
617 spin_lock_irqsave(&ctx_alloc_lock, flags);
618 orig_pgsz_bits = (mm->context.sparc64_ctx_val & CTX_PGSZ_MASK);
619 ctx = (tlb_context_cache + 1) & CTX_NR_MASK;
620 new_ctx = find_next_zero_bit(mmu_context_bmap, 1 << CTX_NR_BITS, ctx);
621 new_version = 0;
622 if (new_ctx >= (1 << CTX_NR_BITS)) {
623 new_ctx = find_next_zero_bit(mmu_context_bmap, ctx, 1);
624 if (new_ctx >= ctx) {
625 int i;
626 new_ctx = (tlb_context_cache & CTX_VERSION_MASK) +
627 CTX_FIRST_VERSION;
628 if (new_ctx == 1)
629 new_ctx = CTX_FIRST_VERSION;
630
631 /* Don't call memset, for 16 entries that's just
632 * plain silly...
633 */
634 mmu_context_bmap[0] = 3;
635 mmu_context_bmap[1] = 0;
636 mmu_context_bmap[2] = 0;
637 mmu_context_bmap[3] = 0;
638 for (i = 4; i < CTX_BMAP_SLOTS; i += 4) {
639 mmu_context_bmap[i + 0] = 0;
640 mmu_context_bmap[i + 1] = 0;
641 mmu_context_bmap[i + 2] = 0;
642 mmu_context_bmap[i + 3] = 0;
643 }
644 new_version = 1;
645 goto out;
646 }
647 }
648 mmu_context_bmap[new_ctx>>6] |= (1UL << (new_ctx & 63));
649 new_ctx |= (tlb_context_cache & CTX_VERSION_MASK);
650out:
651 tlb_context_cache = new_ctx;
652 mm->context.sparc64_ctx_val = new_ctx | orig_pgsz_bits;
653 spin_unlock_irqrestore(&ctx_alloc_lock, flags);
654
655 if (unlikely(new_version))
656 smp_new_mmu_context_version();
657}
658
659static int numa_enabled = 1;
660static int numa_debug;
661
662static int __init early_numa(char *p)
663{
664 if (!p)
665 return 0;
666
667 if (strstr(p, "off"))
668 numa_enabled = 0;
669
670 if (strstr(p, "debug"))
671 numa_debug = 1;
672
673 return 0;
674}
675early_param("numa", early_numa);
676
677#define numadbg(f, a...) \
678do { if (numa_debug) \
679 printk(KERN_INFO f, ## a); \
680} while (0)
681
682static void __init find_ramdisk(unsigned long phys_base)
683{
684#ifdef CONFIG_BLK_DEV_INITRD
685 if (sparc_ramdisk_image || sparc_ramdisk_image64) {
686 unsigned long ramdisk_image;
687
688 /* Older versions of the bootloader only supported a
689 * 32-bit physical address for the ramdisk image
690 * location, stored at sparc_ramdisk_image. Newer
691 * SILO versions set sparc_ramdisk_image to zero and
692 * provide a full 64-bit physical address at
693 * sparc_ramdisk_image64.
694 */
695 ramdisk_image = sparc_ramdisk_image;
696 if (!ramdisk_image)
697 ramdisk_image = sparc_ramdisk_image64;
698
699 /* Another bootloader quirk. The bootloader normalizes
700 * the physical address to KERNBASE, so we have to
701 * factor that back out and add in the lowest valid
702 * physical page address to get the true physical address.
703 */
704 ramdisk_image -= KERNBASE;
705 ramdisk_image += phys_base;
706
707 numadbg("Found ramdisk at physical address 0x%lx, size %u\n",
708 ramdisk_image, sparc_ramdisk_size);
709
710 initrd_start = ramdisk_image;
711 initrd_end = ramdisk_image + sparc_ramdisk_size;
712
713 lmb_reserve(initrd_start, sparc_ramdisk_size);
714
715 initrd_start += PAGE_OFFSET;
716 initrd_end += PAGE_OFFSET;
717 }
718#endif
719}
720
721struct node_mem_mask {
722 unsigned long mask;
723 unsigned long val;
724 unsigned long bootmem_paddr;
725};
726static struct node_mem_mask node_masks[MAX_NUMNODES];
727static int num_node_masks;
728
729int numa_cpu_lookup_table[NR_CPUS];
730cpumask_t numa_cpumask_lookup_table[MAX_NUMNODES];
731
732#ifdef CONFIG_NEED_MULTIPLE_NODES
733
734struct mdesc_mblock {
735 u64 base;
736 u64 size;
737 u64 offset; /* RA-to-PA */
738};
739static struct mdesc_mblock *mblocks;
740static int num_mblocks;
741
742static unsigned long ra_to_pa(unsigned long addr)
743{
744 int i;
745
746 for (i = 0; i < num_mblocks; i++) {
747 struct mdesc_mblock *m = &mblocks[i];
748
749 if (addr >= m->base &&
750 addr < (m->base + m->size)) {
751 addr += m->offset;
752 break;
753 }
754 }
755 return addr;
756}
757
758static int find_node(unsigned long addr)
759{
760 int i;
761
762 addr = ra_to_pa(addr);
763 for (i = 0; i < num_node_masks; i++) {
764 struct node_mem_mask *p = &node_masks[i];
765
766 if ((addr & p->mask) == p->val)
767 return i;
768 }
769 return -1;
770}
771
772static unsigned long nid_range(unsigned long start, unsigned long end,
773 int *nid)
774{
775 *nid = find_node(start);
776 start += PAGE_SIZE;
777 while (start < end) {
778 int n = find_node(start);
779
780 if (n != *nid)
781 break;
782 start += PAGE_SIZE;
783 }
784
785 if (start > end)
786 start = end;
787
788 return start;
789}
790#else
791static unsigned long nid_range(unsigned long start, unsigned long end,
792 int *nid)
793{
794 *nid = 0;
795 return end;
796}
797#endif
798
799/* This must be invoked after performing all of the necessary
800 * add_active_range() calls for 'nid'. We need to be able to get
801 * correct data from get_pfn_range_for_nid().
802 */
803static void __init allocate_node_data(int nid)
804{
805 unsigned long paddr, num_pages, start_pfn, end_pfn;
806 struct pglist_data *p;
807
808#ifdef CONFIG_NEED_MULTIPLE_NODES
809 paddr = lmb_alloc_nid(sizeof(struct pglist_data),
810 SMP_CACHE_BYTES, nid, nid_range);
811 if (!paddr) {
812 prom_printf("Cannot allocate pglist_data for nid[%d]\n", nid);
813 prom_halt();
814 }
815 NODE_DATA(nid) = __va(paddr);
816 memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
817
818 NODE_DATA(nid)->bdata = &bootmem_node_data[nid];
819#endif
820
821 p = NODE_DATA(nid);
822
823 get_pfn_range_for_nid(nid, &start_pfn, &end_pfn);
824 p->node_start_pfn = start_pfn;
825 p->node_spanned_pages = end_pfn - start_pfn;
826
827 if (p->node_spanned_pages) {
828 num_pages = bootmem_bootmap_pages(p->node_spanned_pages);
829
830 paddr = lmb_alloc_nid(num_pages << PAGE_SHIFT, PAGE_SIZE, nid,
831 nid_range);
832 if (!paddr) {
833 prom_printf("Cannot allocate bootmap for nid[%d]\n",
834 nid);
835 prom_halt();
836 }
837 node_masks[nid].bootmem_paddr = paddr;
838 }
839}
840
841static void init_node_masks_nonnuma(void)
842{
843 int i;
844
845 numadbg("Initializing tables for non-numa.\n");
846
847 node_masks[0].mask = node_masks[0].val = 0;
848 num_node_masks = 1;
849
850 for (i = 0; i < NR_CPUS; i++)
851 numa_cpu_lookup_table[i] = 0;
852
853 numa_cpumask_lookup_table[0] = CPU_MASK_ALL;
854}
855
856#ifdef CONFIG_NEED_MULTIPLE_NODES
857struct pglist_data *node_data[MAX_NUMNODES];
858
859EXPORT_SYMBOL(numa_cpu_lookup_table);
860EXPORT_SYMBOL(numa_cpumask_lookup_table);
861EXPORT_SYMBOL(node_data);
862
863struct mdesc_mlgroup {
864 u64 node;
865 u64 latency;
866 u64 match;
867 u64 mask;
868};
869static struct mdesc_mlgroup *mlgroups;
870static int num_mlgroups;
871
872static int scan_pio_for_cfg_handle(struct mdesc_handle *md, u64 pio,
873 u32 cfg_handle)
874{
875 u64 arc;
876
877 mdesc_for_each_arc(arc, md, pio, MDESC_ARC_TYPE_FWD) {
878 u64 target = mdesc_arc_target(md, arc);
879 const u64 *val;
880
881 val = mdesc_get_property(md, target,
882 "cfg-handle", NULL);
883 if (val && *val == cfg_handle)
884 return 0;
885 }
886 return -ENODEV;
887}
888
889static int scan_arcs_for_cfg_handle(struct mdesc_handle *md, u64 grp,
890 u32 cfg_handle)
891{
892 u64 arc, candidate, best_latency = ~(u64)0;
893
894 candidate = MDESC_NODE_NULL;
895 mdesc_for_each_arc(arc, md, grp, MDESC_ARC_TYPE_FWD) {
896 u64 target = mdesc_arc_target(md, arc);
897 const char *name = mdesc_node_name(md, target);
898 const u64 *val;
899
900 if (strcmp(name, "pio-latency-group"))
901 continue;
902
903 val = mdesc_get_property(md, target, "latency", NULL);
904 if (!val)
905 continue;
906
907 if (*val < best_latency) {
908 candidate = target;
909 best_latency = *val;
910 }
911 }
912
913 if (candidate == MDESC_NODE_NULL)
914 return -ENODEV;
915
916 return scan_pio_for_cfg_handle(md, candidate, cfg_handle);
917}
918
919int of_node_to_nid(struct device_node *dp)
920{
921 const struct linux_prom64_registers *regs;
922 struct mdesc_handle *md;
923 u32 cfg_handle;
924 int count, nid;
925 u64 grp;
926
927 /* This is the right thing to do on currently supported
928 * SUN4U NUMA platforms as well, as the PCI controller does
929 * not sit behind any particular memory controller.
930 */
931 if (!mlgroups)
932 return -1;
933
934 regs = of_get_property(dp, "reg", NULL);
935 if (!regs)
936 return -1;
937
938 cfg_handle = (regs->phys_addr >> 32UL) & 0x0fffffff;
939
940 md = mdesc_grab();
941
942 count = 0;
943 nid = -1;
944 mdesc_for_each_node_by_name(md, grp, "group") {
945 if (!scan_arcs_for_cfg_handle(md, grp, cfg_handle)) {
946 nid = count;
947 break;
948 }
949 count++;
950 }
951
952 mdesc_release(md);
953
954 return nid;
955}
956
957static void add_node_ranges(void)
958{
959 int i;
960
961 for (i = 0; i < lmb.memory.cnt; i++) {
962 unsigned long size = lmb_size_bytes(&lmb.memory, i);
963 unsigned long start, end;
964
965 start = lmb.memory.region[i].base;
966 end = start + size;
967 while (start < end) {
968 unsigned long this_end;
969 int nid;
970
971 this_end = nid_range(start, end, &nid);
972
973 numadbg("Adding active range nid[%d] "
974 "start[%lx] end[%lx]\n",
975 nid, start, this_end);
976
977 add_active_range(nid,
978 start >> PAGE_SHIFT,
979 this_end >> PAGE_SHIFT);
980
981 start = this_end;
982 }
983 }
984}
985
986static int __init grab_mlgroups(struct mdesc_handle *md)
987{
988 unsigned long paddr;
989 int count = 0;
990 u64 node;
991
992 mdesc_for_each_node_by_name(md, node, "memory-latency-group")
993 count++;
994 if (!count)
995 return -ENOENT;
996
997 paddr = lmb_alloc(count * sizeof(struct mdesc_mlgroup),
998 SMP_CACHE_BYTES);
999 if (!paddr)
1000 return -ENOMEM;
1001
1002 mlgroups = __va(paddr);
1003 num_mlgroups = count;
1004
1005 count = 0;
1006 mdesc_for_each_node_by_name(md, node, "memory-latency-group") {
1007 struct mdesc_mlgroup *m = &mlgroups[count++];
1008 const u64 *val;
1009
1010 m->node = node;
1011
1012 val = mdesc_get_property(md, node, "latency", NULL);
1013 m->latency = *val;
1014 val = mdesc_get_property(md, node, "address-match", NULL);
1015 m->match = *val;
1016 val = mdesc_get_property(md, node, "address-mask", NULL);
1017 m->mask = *val;
1018
1019 numadbg("MLGROUP[%d]: node[%lx] latency[%lx] "
1020 "match[%lx] mask[%lx]\n",
1021 count - 1, m->node, m->latency, m->match, m->mask);
1022 }
1023
1024 return 0;
1025}
1026
1027static int __init grab_mblocks(struct mdesc_handle *md)
1028{
1029 unsigned long paddr;
1030 int count = 0;
1031 u64 node;
1032
1033 mdesc_for_each_node_by_name(md, node, "mblock")
1034 count++;
1035 if (!count)
1036 return -ENOENT;
1037
1038 paddr = lmb_alloc(count * sizeof(struct mdesc_mblock),
1039 SMP_CACHE_BYTES);
1040 if (!paddr)
1041 return -ENOMEM;
1042
1043 mblocks = __va(paddr);
1044 num_mblocks = count;
1045
1046 count = 0;
1047 mdesc_for_each_node_by_name(md, node, "mblock") {
1048 struct mdesc_mblock *m = &mblocks[count++];
1049 const u64 *val;
1050
1051 val = mdesc_get_property(md, node, "base", NULL);
1052 m->base = *val;
1053 val = mdesc_get_property(md, node, "size", NULL);
1054 m->size = *val;
1055 val = mdesc_get_property(md, node,
1056 "address-congruence-offset", NULL);
1057 m->offset = *val;
1058
1059 numadbg("MBLOCK[%d]: base[%lx] size[%lx] offset[%lx]\n",
1060 count - 1, m->base, m->size, m->offset);
1061 }
1062
1063 return 0;
1064}
1065
1066static void __init numa_parse_mdesc_group_cpus(struct mdesc_handle *md,
1067 u64 grp, cpumask_t *mask)
1068{
1069 u64 arc;
1070
1071 cpus_clear(*mask);
1072
1073 mdesc_for_each_arc(arc, md, grp, MDESC_ARC_TYPE_BACK) {
1074 u64 target = mdesc_arc_target(md, arc);
1075 const char *name = mdesc_node_name(md, target);
1076 const u64 *id;
1077
1078 if (strcmp(name, "cpu"))
1079 continue;
1080 id = mdesc_get_property(md, target, "id", NULL);
1081 if (*id < NR_CPUS)
1082 cpu_set(*id, *mask);
1083 }
1084}
1085
1086static struct mdesc_mlgroup * __init find_mlgroup(u64 node)
1087{
1088 int i;
1089
1090 for (i = 0; i < num_mlgroups; i++) {
1091 struct mdesc_mlgroup *m = &mlgroups[i];
1092 if (m->node == node)
1093 return m;
1094 }
1095 return NULL;
1096}
1097
1098static int __init numa_attach_mlgroup(struct mdesc_handle *md, u64 grp,
1099 int index)
1100{
1101 struct mdesc_mlgroup *candidate = NULL;
1102 u64 arc, best_latency = ~(u64)0;
1103 struct node_mem_mask *n;
1104
1105 mdesc_for_each_arc(arc, md, grp, MDESC_ARC_TYPE_FWD) {
1106 u64 target = mdesc_arc_target(md, arc);
1107 struct mdesc_mlgroup *m = find_mlgroup(target);
1108 if (!m)
1109 continue;
1110 if (m->latency < best_latency) {
1111 candidate = m;
1112 best_latency = m->latency;
1113 }
1114 }
1115 if (!candidate)
1116 return -ENOENT;
1117
1118 if (num_node_masks != index) {
1119 printk(KERN_ERR "Inconsistent NUMA state, "
1120 "index[%d] != num_node_masks[%d]\n",
1121 index, num_node_masks);
1122 return -EINVAL;
1123 }
1124
1125 n = &node_masks[num_node_masks++];
1126
1127 n->mask = candidate->mask;
1128 n->val = candidate->match;
1129
1130 numadbg("NUMA NODE[%d]: mask[%lx] val[%lx] (latency[%lx])\n",
1131 index, n->mask, n->val, candidate->latency);
1132
1133 return 0;
1134}
1135
1136static int __init numa_parse_mdesc_group(struct mdesc_handle *md, u64 grp,
1137 int index)
1138{
1139 cpumask_t mask;
1140 int cpu;
1141
1142 numa_parse_mdesc_group_cpus(md, grp, &mask);
1143
1144 for_each_cpu_mask(cpu, mask)
1145 numa_cpu_lookup_table[cpu] = index;
1146 numa_cpumask_lookup_table[index] = mask;
1147
1148 if (numa_debug) {
1149 printk(KERN_INFO "NUMA GROUP[%d]: cpus [ ", index);
1150 for_each_cpu_mask(cpu, mask)
1151 printk("%d ", cpu);
1152 printk("]\n");
1153 }
1154
1155 return numa_attach_mlgroup(md, grp, index);
1156}
1157
1158static int __init numa_parse_mdesc(void)
1159{
1160 struct mdesc_handle *md = mdesc_grab();
1161 int i, err, count;
1162 u64 node;
1163
1164 node = mdesc_node_by_name(md, MDESC_NODE_NULL, "latency-groups");
1165 if (node == MDESC_NODE_NULL) {
1166 mdesc_release(md);
1167 return -ENOENT;
1168 }
1169
1170 err = grab_mblocks(md);
1171 if (err < 0)
1172 goto out;
1173
1174 err = grab_mlgroups(md);
1175 if (err < 0)
1176 goto out;
1177
1178 count = 0;
1179 mdesc_for_each_node_by_name(md, node, "group") {
1180 err = numa_parse_mdesc_group(md, node, count);
1181 if (err < 0)
1182 break;
1183 count++;
1184 }
1185
1186 add_node_ranges();
1187
1188 for (i = 0; i < num_node_masks; i++) {
1189 allocate_node_data(i);
1190 node_set_online(i);
1191 }
1192
1193 err = 0;
1194out:
1195 mdesc_release(md);
1196 return err;
1197}
1198
1199static int __init numa_parse_jbus(void)
1200{
1201 unsigned long cpu, index;
1202
1203 /* NUMA node id is encoded in bits 36 and higher, and there is
1204 * a 1-to-1 mapping from CPU ID to NUMA node ID.
1205 */
1206 index = 0;
1207 for_each_present_cpu(cpu) {
1208 numa_cpu_lookup_table[cpu] = index;
1209 numa_cpumask_lookup_table[index] = cpumask_of_cpu(cpu);
1210 node_masks[index].mask = ~((1UL << 36UL) - 1UL);
1211 node_masks[index].val = cpu << 36UL;
1212
1213 index++;
1214 }
1215 num_node_masks = index;
1216
1217 add_node_ranges();
1218
1219 for (index = 0; index < num_node_masks; index++) {
1220 allocate_node_data(index);
1221 node_set_online(index);
1222 }
1223
1224 return 0;
1225}
1226
1227static int __init numa_parse_sun4u(void)
1228{
1229 if (tlb_type == cheetah || tlb_type == cheetah_plus) {
1230 unsigned long ver;
1231
1232 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
1233 if ((ver >> 32UL) == __JALAPENO_ID ||
1234 (ver >> 32UL) == __SERRANO_ID)
1235 return numa_parse_jbus();
1236 }
1237 return -1;
1238}
1239
1240static int __init bootmem_init_numa(void)
1241{
1242 int err = -1;
1243
1244 numadbg("bootmem_init_numa()\n");
1245
1246 if (numa_enabled) {
1247 if (tlb_type == hypervisor)
1248 err = numa_parse_mdesc();
1249 else
1250 err = numa_parse_sun4u();
1251 }
1252 return err;
1253}
1254
1255#else
1256
1257static int bootmem_init_numa(void)
1258{
1259 return -1;
1260}
1261
1262#endif
1263
1264static void __init bootmem_init_nonnuma(void)
1265{
1266 unsigned long top_of_ram = lmb_end_of_DRAM();
1267 unsigned long total_ram = lmb_phys_mem_size();
1268 unsigned int i;
1269
1270 numadbg("bootmem_init_nonnuma()\n");
1271
1272 printk(KERN_INFO "Top of RAM: 0x%lx, Total RAM: 0x%lx\n",
1273 top_of_ram, total_ram);
1274 printk(KERN_INFO "Memory hole size: %ldMB\n",
1275 (top_of_ram - total_ram) >> 20);
1276
1277 init_node_masks_nonnuma();
1278
1279 for (i = 0; i < lmb.memory.cnt; i++) {
1280 unsigned long size = lmb_size_bytes(&lmb.memory, i);
1281 unsigned long start_pfn, end_pfn;
1282
1283 if (!size)
1284 continue;
1285
1286 start_pfn = lmb.memory.region[i].base >> PAGE_SHIFT;
1287 end_pfn = start_pfn + lmb_size_pages(&lmb.memory, i);
1288 add_active_range(0, start_pfn, end_pfn);
1289 }
1290
1291 allocate_node_data(0);
1292
1293 node_set_online(0);
1294}
1295
1296static void __init reserve_range_in_node(int nid, unsigned long start,
1297 unsigned long end)
1298{
1299 numadbg(" reserve_range_in_node(nid[%d],start[%lx],end[%lx]\n",
1300 nid, start, end);
1301 while (start < end) {
1302 unsigned long this_end;
1303 int n;
1304
1305 this_end = nid_range(start, end, &n);
1306 if (n == nid) {
1307 numadbg(" MATCH reserving range [%lx:%lx]\n",
1308 start, this_end);
1309 reserve_bootmem_node(NODE_DATA(nid), start,
1310 (this_end - start), BOOTMEM_DEFAULT);
1311 } else
1312 numadbg(" NO MATCH, advancing start to %lx\n",
1313 this_end);
1314
1315 start = this_end;
1316 }
1317}
1318
1319static void __init trim_reserved_in_node(int nid)
1320{
1321 int i;
1322
1323 numadbg(" trim_reserved_in_node(%d)\n", nid);
1324
1325 for (i = 0; i < lmb.reserved.cnt; i++) {
1326 unsigned long start = lmb.reserved.region[i].base;
1327 unsigned long size = lmb_size_bytes(&lmb.reserved, i);
1328 unsigned long end = start + size;
1329
1330 reserve_range_in_node(nid, start, end);
1331 }
1332}
1333
1334static void __init bootmem_init_one_node(int nid)
1335{
1336 struct pglist_data *p;
1337
1338 numadbg("bootmem_init_one_node(%d)\n", nid);
1339
1340 p = NODE_DATA(nid);
1341
1342 if (p->node_spanned_pages) {
1343 unsigned long paddr = node_masks[nid].bootmem_paddr;
1344 unsigned long end_pfn;
1345
1346 end_pfn = p->node_start_pfn + p->node_spanned_pages;
1347
1348 numadbg(" init_bootmem_node(%d, %lx, %lx, %lx)\n",
1349 nid, paddr >> PAGE_SHIFT, p->node_start_pfn, end_pfn);
1350
1351 init_bootmem_node(p, paddr >> PAGE_SHIFT,
1352 p->node_start_pfn, end_pfn);
1353
1354 numadbg(" free_bootmem_with_active_regions(%d, %lx)\n",
1355 nid, end_pfn);
1356 free_bootmem_with_active_regions(nid, end_pfn);
1357
1358 trim_reserved_in_node(nid);
1359
1360 numadbg(" sparse_memory_present_with_active_regions(%d)\n",
1361 nid);
1362 sparse_memory_present_with_active_regions(nid);
1363 }
1364}
1365
1366static unsigned long __init bootmem_init(unsigned long phys_base)
1367{
1368 unsigned long end_pfn;
1369 int nid;
1370
1371 end_pfn = lmb_end_of_DRAM() >> PAGE_SHIFT;
1372 max_pfn = max_low_pfn = end_pfn;
1373 min_low_pfn = (phys_base >> PAGE_SHIFT);
1374
1375 if (bootmem_init_numa() < 0)
1376 bootmem_init_nonnuma();
1377
1378 /* XXX cpu notifier XXX */
1379
1380 for_each_online_node(nid)
1381 bootmem_init_one_node(nid);
1382
1383 sparse_init();
1384
1385 return end_pfn;
1386}
1387
1388static struct linux_prom64_registers pall[MAX_BANKS] __initdata;
1389static int pall_ents __initdata;
1390
1391#ifdef CONFIG_DEBUG_PAGEALLOC
1392static unsigned long __ref kernel_map_range(unsigned long pstart,
1393 unsigned long pend, pgprot_t prot)
1394{
1395 unsigned long vstart = PAGE_OFFSET + pstart;
1396 unsigned long vend = PAGE_OFFSET + pend;
1397 unsigned long alloc_bytes = 0UL;
1398
1399 if ((vstart & ~PAGE_MASK) || (vend & ~PAGE_MASK)) {
1400 prom_printf("kernel_map: Unaligned physmem[%lx:%lx]\n",
1401 vstart, vend);
1402 prom_halt();
1403 }
1404
1405 while (vstart < vend) {
1406 unsigned long this_end, paddr = __pa(vstart);
1407 pgd_t *pgd = pgd_offset_k(vstart);
1408 pud_t *pud;
1409 pmd_t *pmd;
1410 pte_t *pte;
1411
1412 pud = pud_offset(pgd, vstart);
1413 if (pud_none(*pud)) {
1414 pmd_t *new;
1415
1416 new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE);
1417 alloc_bytes += PAGE_SIZE;
1418 pud_populate(&init_mm, pud, new);
1419 }
1420
1421 pmd = pmd_offset(pud, vstart);
1422 if (!pmd_present(*pmd)) {
1423 pte_t *new;
1424
1425 new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE);
1426 alloc_bytes += PAGE_SIZE;
1427 pmd_populate_kernel(&init_mm, pmd, new);
1428 }
1429
1430 pte = pte_offset_kernel(pmd, vstart);
1431 this_end = (vstart + PMD_SIZE) & PMD_MASK;
1432 if (this_end > vend)
1433 this_end = vend;
1434
1435 while (vstart < this_end) {
1436 pte_val(*pte) = (paddr | pgprot_val(prot));
1437
1438 vstart += PAGE_SIZE;
1439 paddr += PAGE_SIZE;
1440 pte++;
1441 }
1442 }
1443
1444 return alloc_bytes;
1445}
1446
1447extern unsigned int kvmap_linear_patch[1];
1448#endif /* CONFIG_DEBUG_PAGEALLOC */
1449
1450static void __init mark_kpte_bitmap(unsigned long start, unsigned long end)
1451{
1452 const unsigned long shift_256MB = 28;
1453 const unsigned long mask_256MB = ((1UL << shift_256MB) - 1UL);
1454 const unsigned long size_256MB = (1UL << shift_256MB);
1455
1456 while (start < end) {
1457 long remains;
1458
1459 remains = end - start;
1460 if (remains < size_256MB)
1461 break;
1462
1463 if (start & mask_256MB) {
1464 start = (start + size_256MB) & ~mask_256MB;
1465 continue;
1466 }
1467
1468 while (remains >= size_256MB) {
1469 unsigned long index = start >> shift_256MB;
1470
1471 __set_bit(index, kpte_linear_bitmap);
1472
1473 start += size_256MB;
1474 remains -= size_256MB;
1475 }
1476 }
1477}
1478
1479static void __init init_kpte_bitmap(void)
1480{
1481 unsigned long i;
1482
1483 for (i = 0; i < pall_ents; i++) {
1484 unsigned long phys_start, phys_end;
1485
1486 phys_start = pall[i].phys_addr;
1487 phys_end = phys_start + pall[i].reg_size;
1488
1489 mark_kpte_bitmap(phys_start, phys_end);
1490 }
1491}
1492
1493static void __init kernel_physical_mapping_init(void)
1494{
1495#ifdef CONFIG_DEBUG_PAGEALLOC
1496 unsigned long i, mem_alloced = 0UL;
1497
1498 for (i = 0; i < pall_ents; i++) {
1499 unsigned long phys_start, phys_end;
1500
1501 phys_start = pall[i].phys_addr;
1502 phys_end = phys_start + pall[i].reg_size;
1503
1504 mem_alloced += kernel_map_range(phys_start, phys_end,
1505 PAGE_KERNEL);
1506 }
1507
1508 printk("Allocated %ld bytes for kernel page tables.\n",
1509 mem_alloced);
1510
1511 kvmap_linear_patch[0] = 0x01000000; /* nop */
1512 flushi(&kvmap_linear_patch[0]);
1513
1514 __flush_tlb_all();
1515#endif
1516}
1517
1518#ifdef CONFIG_DEBUG_PAGEALLOC
1519void kernel_map_pages(struct page *page, int numpages, int enable)
1520{
1521 unsigned long phys_start = page_to_pfn(page) << PAGE_SHIFT;
1522 unsigned long phys_end = phys_start + (numpages * PAGE_SIZE);
1523
1524 kernel_map_range(phys_start, phys_end,
1525 (enable ? PAGE_KERNEL : __pgprot(0)));
1526
1527 flush_tsb_kernel_range(PAGE_OFFSET + phys_start,
1528 PAGE_OFFSET + phys_end);
1529
1530 /* we should perform an IPI and flush all tlbs,
1531 * but that can deadlock->flush only current cpu.
1532 */
1533 __flush_tlb_kernel_range(PAGE_OFFSET + phys_start,
1534 PAGE_OFFSET + phys_end);
1535}
1536#endif
1537
1538unsigned long __init find_ecache_flush_span(unsigned long size)
1539{
1540 int i;
1541
1542 for (i = 0; i < pavail_ents; i++) {
1543 if (pavail[i].reg_size >= size)
1544 return pavail[i].phys_addr;
1545 }
1546
1547 return ~0UL;
1548}
1549
1550static void __init tsb_phys_patch(void)
1551{
1552 struct tsb_ldquad_phys_patch_entry *pquad;
1553 struct tsb_phys_patch_entry *p;
1554
1555 pquad = &__tsb_ldquad_phys_patch;
1556 while (pquad < &__tsb_ldquad_phys_patch_end) {
1557 unsigned long addr = pquad->addr;
1558
1559 if (tlb_type == hypervisor)
1560 *(unsigned int *) addr = pquad->sun4v_insn;
1561 else
1562 *(unsigned int *) addr = pquad->sun4u_insn;
1563 wmb();
1564 __asm__ __volatile__("flush %0"
1565 : /* no outputs */
1566 : "r" (addr));
1567
1568 pquad++;
1569 }
1570
1571 p = &__tsb_phys_patch;
1572 while (p < &__tsb_phys_patch_end) {
1573 unsigned long addr = p->addr;
1574
1575 *(unsigned int *) addr = p->insn;
1576 wmb();
1577 __asm__ __volatile__("flush %0"
1578 : /* no outputs */
1579 : "r" (addr));
1580
1581 p++;
1582 }
1583}
1584
1585/* Don't mark as init, we give this to the Hypervisor. */
1586#ifndef CONFIG_DEBUG_PAGEALLOC
1587#define NUM_KTSB_DESCR 2
1588#else
1589#define NUM_KTSB_DESCR 1
1590#endif
1591static struct hv_tsb_descr ktsb_descr[NUM_KTSB_DESCR];
1592extern struct tsb swapper_tsb[KERNEL_TSB_NENTRIES];
1593
1594static void __init sun4v_ktsb_init(void)
1595{
1596 unsigned long ktsb_pa;
1597
1598 /* First KTSB for PAGE_SIZE mappings. */
1599 ktsb_pa = kern_base + ((unsigned long)&swapper_tsb[0] - KERNBASE);
1600
1601 switch (PAGE_SIZE) {
1602 case 8 * 1024:
1603 default:
1604 ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_8K;
1605 ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_8K;
1606 break;
1607
1608 case 64 * 1024:
1609 ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_64K;
1610 ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_64K;
1611 break;
1612
1613 case 512 * 1024:
1614 ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_512K;
1615 ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_512K;
1616 break;
1617
1618 case 4 * 1024 * 1024:
1619 ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_4MB;
1620 ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_4MB;
1621 break;
1622 };
1623
1624 ktsb_descr[0].assoc = 1;
1625 ktsb_descr[0].num_ttes = KERNEL_TSB_NENTRIES;
1626 ktsb_descr[0].ctx_idx = 0;
1627 ktsb_descr[0].tsb_base = ktsb_pa;
1628 ktsb_descr[0].resv = 0;
1629
1630#ifndef CONFIG_DEBUG_PAGEALLOC
1631 /* Second KTSB for 4MB/256MB mappings. */
1632 ktsb_pa = (kern_base +
1633 ((unsigned long)&swapper_4m_tsb[0] - KERNBASE));
1634
1635 ktsb_descr[1].pgsz_idx = HV_PGSZ_IDX_4MB;
1636 ktsb_descr[1].pgsz_mask = (HV_PGSZ_MASK_4MB |
1637 HV_PGSZ_MASK_256MB);
1638 ktsb_descr[1].assoc = 1;
1639 ktsb_descr[1].num_ttes = KERNEL_TSB4M_NENTRIES;
1640 ktsb_descr[1].ctx_idx = 0;
1641 ktsb_descr[1].tsb_base = ktsb_pa;
1642 ktsb_descr[1].resv = 0;
1643#endif
1644}
1645
1646void __cpuinit sun4v_ktsb_register(void)
1647{
1648 unsigned long pa, ret;
1649
1650 pa = kern_base + ((unsigned long)&ktsb_descr[0] - KERNBASE);
1651
1652 ret = sun4v_mmu_tsb_ctx0(NUM_KTSB_DESCR, pa);
1653 if (ret != 0) {
1654 prom_printf("hypervisor_mmu_tsb_ctx0[%lx]: "
1655 "errors with %lx\n", pa, ret);
1656 prom_halt();
1657 }
1658}
1659
1660/* paging_init() sets up the page tables */
1661
1662static unsigned long last_valid_pfn;
1663pgd_t swapper_pg_dir[2048];
1664
1665static void sun4u_pgprot_init(void);
1666static void sun4v_pgprot_init(void);
1667
1668/* Dummy function */
1669void __init setup_per_cpu_areas(void)
1670{
1671}
1672
1673void __init paging_init(void)
1674{
1675 unsigned long end_pfn, shift, phys_base;
1676 unsigned long real_end, i;
1677
1678 /* These build time checkes make sure that the dcache_dirty_cpu()
1679 * page->flags usage will work.
1680 *
1681 * When a page gets marked as dcache-dirty, we store the
1682 * cpu number starting at bit 32 in the page->flags. Also,
1683 * functions like clear_dcache_dirty_cpu use the cpu mask
1684 * in 13-bit signed-immediate instruction fields.
1685 */
1686
1687 /*
1688 * Page flags must not reach into upper 32 bits that are used
1689 * for the cpu number
1690 */
1691 BUILD_BUG_ON(NR_PAGEFLAGS > 32);
1692
1693 /*
1694 * The bit fields placed in the high range must not reach below
1695 * the 32 bit boundary. Otherwise we cannot place the cpu field
1696 * at the 32 bit boundary.
1697 */
1698 BUILD_BUG_ON(SECTIONS_WIDTH + NODES_WIDTH + ZONES_WIDTH +
1699 ilog2(roundup_pow_of_two(NR_CPUS)) > 32);
1700
1701 BUILD_BUG_ON(NR_CPUS > 4096);
1702
1703 kern_base = (prom_boot_mapping_phys_low >> 22UL) << 22UL;
1704 kern_size = (unsigned long)&_end - (unsigned long)KERNBASE;
1705
1706 /* Invalidate both kernel TSBs. */
1707 memset(swapper_tsb, 0x40, sizeof(swapper_tsb));
1708#ifndef CONFIG_DEBUG_PAGEALLOC
1709 memset(swapper_4m_tsb, 0x40, sizeof(swapper_4m_tsb));
1710#endif
1711
1712 if (tlb_type == hypervisor)
1713 sun4v_pgprot_init();
1714 else
1715 sun4u_pgprot_init();
1716
1717 if (tlb_type == cheetah_plus ||
1718 tlb_type == hypervisor)
1719 tsb_phys_patch();
1720
1721 if (tlb_type == hypervisor) {
1722 sun4v_patch_tlb_handlers();
1723 sun4v_ktsb_init();
1724 }
1725
1726 lmb_init();
1727
1728 /* Find available physical memory...
1729 *
1730 * Read it twice in order to work around a bug in openfirmware.
1731 * The call to grab this table itself can cause openfirmware to
1732 * allocate memory, which in turn can take away some space from
1733 * the list of available memory. Reading it twice makes sure
1734 * we really do get the final value.
1735 */
1736 read_obp_translations();
1737 read_obp_memory("reg", &pall[0], &pall_ents);
1738 read_obp_memory("available", &pavail[0], &pavail_ents);
1739 read_obp_memory("available", &pavail[0], &pavail_ents);
1740
1741 phys_base = 0xffffffffffffffffUL;
1742 for (i = 0; i < pavail_ents; i++) {
1743 phys_base = min(phys_base, pavail[i].phys_addr);
1744 lmb_add(pavail[i].phys_addr, pavail[i].reg_size);
1745 }
1746
1747 lmb_reserve(kern_base, kern_size);
1748
1749 find_ramdisk(phys_base);
1750
1751 lmb_enforce_memory_limit(cmdline_memory_size);
1752
1753 lmb_analyze();
1754 lmb_dump_all();
1755
1756 set_bit(0, mmu_context_bmap);
1757
1758 shift = kern_base + PAGE_OFFSET - ((unsigned long)KERNBASE);
1759
1760 real_end = (unsigned long)_end;
1761 num_kernel_image_mappings = DIV_ROUND_UP(real_end - KERNBASE, 1 << 22);
1762 printk("Kernel: Using %d locked TLB entries for main kernel image.\n",
1763 num_kernel_image_mappings);
1764
1765 /* Set kernel pgd to upper alias so physical page computations
1766 * work.
1767 */
1768 init_mm.pgd += ((shift) / (sizeof(pgd_t)));
1769
1770 memset(swapper_low_pmd_dir, 0, sizeof(swapper_low_pmd_dir));
1771
1772 /* Now can init the kernel/bad page tables. */
1773 pud_set(pud_offset(&swapper_pg_dir[0], 0),
1774 swapper_low_pmd_dir + (shift / sizeof(pgd_t)));
1775
1776 inherit_prom_mappings();
1777
1778 init_kpte_bitmap();
1779
1780 /* Ok, we can use our TLB miss and window trap handlers safely. */
1781 setup_tba();
1782
1783 __flush_tlb_all();
1784
1785 if (tlb_type == hypervisor)
1786 sun4v_ktsb_register();
1787
1788 /* We must setup the per-cpu areas before we pull in the
1789 * PROM and the MDESC. The code there fills in cpu and
1790 * other information into per-cpu data structures.
1791 */
1792 real_setup_per_cpu_areas();
1793
1794 prom_build_devicetree();
1795
1796 if (tlb_type == hypervisor)
1797 sun4v_mdesc_init();
1798
1799 /* Once the OF device tree and MDESC have been setup, we know
1800 * the list of possible cpus. Therefore we can allocate the
1801 * IRQ stacks.
1802 */
1803 for_each_possible_cpu(i) {
1804 /* XXX Use node local allocations... XXX */
1805 softirq_stack[i] = __va(lmb_alloc(THREAD_SIZE, THREAD_SIZE));
1806 hardirq_stack[i] = __va(lmb_alloc(THREAD_SIZE, THREAD_SIZE));
1807 }
1808
1809 /* Setup bootmem... */
1810 last_valid_pfn = end_pfn = bootmem_init(phys_base);
1811
1812#ifndef CONFIG_NEED_MULTIPLE_NODES
1813 max_mapnr = last_valid_pfn;
1814#endif
1815 kernel_physical_mapping_init();
1816
1817 {
1818 unsigned long max_zone_pfns[MAX_NR_ZONES];
1819
1820 memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
1821
1822 max_zone_pfns[ZONE_NORMAL] = end_pfn;
1823
1824 free_area_init_nodes(max_zone_pfns);
1825 }
1826
1827 printk("Booting Linux...\n");
1828}
1829
1830int __init page_in_phys_avail(unsigned long paddr)
1831{
1832 int i;
1833
1834 paddr &= PAGE_MASK;
1835
1836 for (i = 0; i < pavail_ents; i++) {
1837 unsigned long start, end;
1838
1839 start = pavail[i].phys_addr;
1840 end = start + pavail[i].reg_size;
1841
1842 if (paddr >= start && paddr < end)
1843 return 1;
1844 }
1845 if (paddr >= kern_base && paddr < (kern_base + kern_size))
1846 return 1;
1847#ifdef CONFIG_BLK_DEV_INITRD
1848 if (paddr >= __pa(initrd_start) &&
1849 paddr < __pa(PAGE_ALIGN(initrd_end)))
1850 return 1;
1851#endif
1852
1853 return 0;
1854}
1855
1856static struct linux_prom64_registers pavail_rescan[MAX_BANKS] __initdata;
1857static int pavail_rescan_ents __initdata;
1858
1859/* Certain OBP calls, such as fetching "available" properties, can
1860 * claim physical memory. So, along with initializing the valid
1861 * address bitmap, what we do here is refetch the physical available
1862 * memory list again, and make sure it provides at least as much
1863 * memory as 'pavail' does.
1864 */
1865static void __init setup_valid_addr_bitmap_from_pavail(void)
1866{
1867 int i;
1868
1869 read_obp_memory("available", &pavail_rescan[0], &pavail_rescan_ents);
1870
1871 for (i = 0; i < pavail_ents; i++) {
1872 unsigned long old_start, old_end;
1873
1874 old_start = pavail[i].phys_addr;
1875 old_end = old_start + pavail[i].reg_size;
1876 while (old_start < old_end) {
1877 int n;
1878
1879 for (n = 0; n < pavail_rescan_ents; n++) {
1880 unsigned long new_start, new_end;
1881
1882 new_start = pavail_rescan[n].phys_addr;
1883 new_end = new_start +
1884 pavail_rescan[n].reg_size;
1885
1886 if (new_start <= old_start &&
1887 new_end >= (old_start + PAGE_SIZE)) {
1888 set_bit(old_start >> 22,
1889 sparc64_valid_addr_bitmap);
1890 goto do_next_page;
1891 }
1892 }
1893
1894 prom_printf("mem_init: Lost memory in pavail\n");
1895 prom_printf("mem_init: OLD start[%lx] size[%lx]\n",
1896 pavail[i].phys_addr,
1897 pavail[i].reg_size);
1898 prom_printf("mem_init: NEW start[%lx] size[%lx]\n",
1899 pavail_rescan[i].phys_addr,
1900 pavail_rescan[i].reg_size);
1901 prom_printf("mem_init: Cannot continue, aborting.\n");
1902 prom_halt();
1903
1904 do_next_page:
1905 old_start += PAGE_SIZE;
1906 }
1907 }
1908}
1909
1910void __init mem_init(void)
1911{
1912 unsigned long codepages, datapages, initpages;
1913 unsigned long addr, last;
1914 int i;
1915
1916 i = last_valid_pfn >> ((22 - PAGE_SHIFT) + 6);
1917 i += 1;
1918 sparc64_valid_addr_bitmap = (unsigned long *) alloc_bootmem(i << 3);
1919 if (sparc64_valid_addr_bitmap == NULL) {
1920 prom_printf("mem_init: Cannot alloc valid_addr_bitmap.\n");
1921 prom_halt();
1922 }
1923 memset(sparc64_valid_addr_bitmap, 0, i << 3);
1924
1925 addr = PAGE_OFFSET + kern_base;
1926 last = PAGE_ALIGN(kern_size) + addr;
1927 while (addr < last) {
1928 set_bit(__pa(addr) >> 22, sparc64_valid_addr_bitmap);
1929 addr += PAGE_SIZE;
1930 }
1931
1932 setup_valid_addr_bitmap_from_pavail();
1933
1934 high_memory = __va(last_valid_pfn << PAGE_SHIFT);
1935
1936#ifdef CONFIG_NEED_MULTIPLE_NODES
1937 for_each_online_node(i) {
1938 if (NODE_DATA(i)->node_spanned_pages != 0) {
1939 totalram_pages +=
1940 free_all_bootmem_node(NODE_DATA(i));
1941 }
1942 }
1943#else
1944 totalram_pages = free_all_bootmem();
1945#endif
1946
1947 /* We subtract one to account for the mem_map_zero page
1948 * allocated below.
1949 */
1950 totalram_pages -= 1;
1951 num_physpages = totalram_pages;
1952
1953 /*
1954 * Set up the zero page, mark it reserved, so that page count
1955 * is not manipulated when freeing the page from user ptes.
1956 */
1957 mem_map_zero = alloc_pages(GFP_KERNEL|__GFP_ZERO, 0);
1958 if (mem_map_zero == NULL) {
1959 prom_printf("paging_init: Cannot alloc zero page.\n");
1960 prom_halt();
1961 }
1962 SetPageReserved(mem_map_zero);
1963
1964 codepages = (((unsigned long) _etext) - ((unsigned long) _start));
1965 codepages = PAGE_ALIGN(codepages) >> PAGE_SHIFT;
1966 datapages = (((unsigned long) _edata) - ((unsigned long) _etext));
1967 datapages = PAGE_ALIGN(datapages) >> PAGE_SHIFT;
1968 initpages = (((unsigned long) __init_end) - ((unsigned long) __init_begin));
1969 initpages = PAGE_ALIGN(initpages) >> PAGE_SHIFT;
1970
1971 printk("Memory: %luk available (%ldk kernel code, %ldk data, %ldk init) [%016lx,%016lx]\n",
1972 nr_free_pages() << (PAGE_SHIFT-10),
1973 codepages << (PAGE_SHIFT-10),
1974 datapages << (PAGE_SHIFT-10),
1975 initpages << (PAGE_SHIFT-10),
1976 PAGE_OFFSET, (last_valid_pfn << PAGE_SHIFT));
1977
1978 if (tlb_type == cheetah || tlb_type == cheetah_plus)
1979 cheetah_ecache_flush_init();
1980}
1981
1982void free_initmem(void)
1983{
1984 unsigned long addr, initend;
1985 int do_free = 1;
1986
1987 /* If the physical memory maps were trimmed by kernel command
1988 * line options, don't even try freeing this initmem stuff up.
1989 * The kernel image could have been in the trimmed out region
1990 * and if so the freeing below will free invalid page structs.
1991 */
1992 if (cmdline_memory_size)
1993 do_free = 0;
1994
1995 /*
1996 * The init section is aligned to 8k in vmlinux.lds. Page align for >8k pagesizes.
1997 */
1998 addr = PAGE_ALIGN((unsigned long)(__init_begin));
1999 initend = (unsigned long)(__init_end) & PAGE_MASK;
2000 for (; addr < initend; addr += PAGE_SIZE) {
2001 unsigned long page;
2002 struct page *p;
2003
2004 page = (addr +
2005 ((unsigned long) __va(kern_base)) -
2006 ((unsigned long) KERNBASE));
2007 memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE);
2008
2009 if (do_free) {
2010 p = virt_to_page(page);
2011
2012 ClearPageReserved(p);
2013 init_page_count(p);
2014 __free_page(p);
2015 num_physpages++;
2016 totalram_pages++;
2017 }
2018 }
2019}
2020
2021#ifdef CONFIG_BLK_DEV_INITRD
2022void free_initrd_mem(unsigned long start, unsigned long end)
2023{
2024 if (start < end)
2025 printk ("Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
2026 for (; start < end; start += PAGE_SIZE) {
2027 struct page *p = virt_to_page(start);
2028
2029 ClearPageReserved(p);
2030 init_page_count(p);
2031 __free_page(p);
2032 num_physpages++;
2033 totalram_pages++;
2034 }
2035}
2036#endif
2037
2038#define _PAGE_CACHE_4U (_PAGE_CP_4U | _PAGE_CV_4U)
2039#define _PAGE_CACHE_4V (_PAGE_CP_4V | _PAGE_CV_4V)
2040#define __DIRTY_BITS_4U (_PAGE_MODIFIED_4U | _PAGE_WRITE_4U | _PAGE_W_4U)
2041#define __DIRTY_BITS_4V (_PAGE_MODIFIED_4V | _PAGE_WRITE_4V | _PAGE_W_4V)
2042#define __ACCESS_BITS_4U (_PAGE_ACCESSED_4U | _PAGE_READ_4U | _PAGE_R)
2043#define __ACCESS_BITS_4V (_PAGE_ACCESSED_4V | _PAGE_READ_4V | _PAGE_R)
2044
2045pgprot_t PAGE_KERNEL __read_mostly;
2046EXPORT_SYMBOL(PAGE_KERNEL);
2047
2048pgprot_t PAGE_KERNEL_LOCKED __read_mostly;
2049pgprot_t PAGE_COPY __read_mostly;
2050
2051pgprot_t PAGE_SHARED __read_mostly;
2052EXPORT_SYMBOL(PAGE_SHARED);
2053
2054unsigned long pg_iobits __read_mostly;
2055
2056unsigned long _PAGE_IE __read_mostly;
2057EXPORT_SYMBOL(_PAGE_IE);
2058
2059unsigned long _PAGE_E __read_mostly;
2060EXPORT_SYMBOL(_PAGE_E);
2061
2062unsigned long _PAGE_CACHE __read_mostly;
2063EXPORT_SYMBOL(_PAGE_CACHE);
2064
2065#ifdef CONFIG_SPARSEMEM_VMEMMAP
2066unsigned long vmemmap_table[VMEMMAP_SIZE];
2067
2068int __meminit vmemmap_populate(struct page *start, unsigned long nr, int node)
2069{
2070 unsigned long vstart = (unsigned long) start;
2071 unsigned long vend = (unsigned long) (start + nr);
2072 unsigned long phys_start = (vstart - VMEMMAP_BASE);
2073 unsigned long phys_end = (vend - VMEMMAP_BASE);
2074 unsigned long addr = phys_start & VMEMMAP_CHUNK_MASK;
2075 unsigned long end = VMEMMAP_ALIGN(phys_end);
2076 unsigned long pte_base;
2077
2078 pte_base = (_PAGE_VALID | _PAGE_SZ4MB_4U |
2079 _PAGE_CP_4U | _PAGE_CV_4U |
2080 _PAGE_P_4U | _PAGE_W_4U);
2081 if (tlb_type == hypervisor)
2082 pte_base = (_PAGE_VALID | _PAGE_SZ4MB_4V |
2083 _PAGE_CP_4V | _PAGE_CV_4V |
2084 _PAGE_P_4V | _PAGE_W_4V);
2085
2086 for (; addr < end; addr += VMEMMAP_CHUNK) {
2087 unsigned long *vmem_pp =
2088 vmemmap_table + (addr >> VMEMMAP_CHUNK_SHIFT);
2089 void *block;
2090
2091 if (!(*vmem_pp & _PAGE_VALID)) {
2092 block = vmemmap_alloc_block(1UL << 22, node);
2093 if (!block)
2094 return -ENOMEM;
2095
2096 *vmem_pp = pte_base | __pa(block);
2097
2098 printk(KERN_INFO "[%p-%p] page_structs=%lu "
2099 "node=%d entry=%lu/%lu\n", start, block, nr,
2100 node,
2101 addr >> VMEMMAP_CHUNK_SHIFT,
2102 VMEMMAP_SIZE >> VMEMMAP_CHUNK_SHIFT);
2103 }
2104 }
2105 return 0;
2106}
2107#endif /* CONFIG_SPARSEMEM_VMEMMAP */
2108
2109static void prot_init_common(unsigned long page_none,
2110 unsigned long page_shared,
2111 unsigned long page_copy,
2112 unsigned long page_readonly,
2113 unsigned long page_exec_bit)
2114{
2115 PAGE_COPY = __pgprot(page_copy);
2116 PAGE_SHARED = __pgprot(page_shared);
2117
2118 protection_map[0x0] = __pgprot(page_none);
2119 protection_map[0x1] = __pgprot(page_readonly & ~page_exec_bit);
2120 protection_map[0x2] = __pgprot(page_copy & ~page_exec_bit);
2121 protection_map[0x3] = __pgprot(page_copy & ~page_exec_bit);
2122 protection_map[0x4] = __pgprot(page_readonly);
2123 protection_map[0x5] = __pgprot(page_readonly);
2124 protection_map[0x6] = __pgprot(page_copy);
2125 protection_map[0x7] = __pgprot(page_copy);
2126 protection_map[0x8] = __pgprot(page_none);
2127 protection_map[0x9] = __pgprot(page_readonly & ~page_exec_bit);
2128 protection_map[0xa] = __pgprot(page_shared & ~page_exec_bit);
2129 protection_map[0xb] = __pgprot(page_shared & ~page_exec_bit);
2130 protection_map[0xc] = __pgprot(page_readonly);
2131 protection_map[0xd] = __pgprot(page_readonly);
2132 protection_map[0xe] = __pgprot(page_shared);
2133 protection_map[0xf] = __pgprot(page_shared);
2134}
2135
2136static void __init sun4u_pgprot_init(void)
2137{
2138 unsigned long page_none, page_shared, page_copy, page_readonly;
2139 unsigned long page_exec_bit;
2140
2141 PAGE_KERNEL = __pgprot (_PAGE_PRESENT_4U | _PAGE_VALID |
2142 _PAGE_CACHE_4U | _PAGE_P_4U |
2143 __ACCESS_BITS_4U | __DIRTY_BITS_4U |
2144 _PAGE_EXEC_4U);
2145 PAGE_KERNEL_LOCKED = __pgprot (_PAGE_PRESENT_4U | _PAGE_VALID |
2146 _PAGE_CACHE_4U | _PAGE_P_4U |
2147 __ACCESS_BITS_4U | __DIRTY_BITS_4U |
2148 _PAGE_EXEC_4U | _PAGE_L_4U);
2149
2150 _PAGE_IE = _PAGE_IE_4U;
2151 _PAGE_E = _PAGE_E_4U;
2152 _PAGE_CACHE = _PAGE_CACHE_4U;
2153
2154 pg_iobits = (_PAGE_VALID | _PAGE_PRESENT_4U | __DIRTY_BITS_4U |
2155 __ACCESS_BITS_4U | _PAGE_E_4U);
2156
2157#ifdef CONFIG_DEBUG_PAGEALLOC
2158 kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZBITS_4U) ^
2159 0xfffff80000000000UL;
2160#else
2161 kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZ4MB_4U) ^
2162 0xfffff80000000000UL;
2163#endif
2164 kern_linear_pte_xor[0] |= (_PAGE_CP_4U | _PAGE_CV_4U |
2165 _PAGE_P_4U | _PAGE_W_4U);
2166
2167 /* XXX Should use 256MB on Panther. XXX */
2168 kern_linear_pte_xor[1] = kern_linear_pte_xor[0];
2169
2170 _PAGE_SZBITS = _PAGE_SZBITS_4U;
2171 _PAGE_ALL_SZ_BITS = (_PAGE_SZ4MB_4U | _PAGE_SZ512K_4U |
2172 _PAGE_SZ64K_4U | _PAGE_SZ8K_4U |
2173 _PAGE_SZ32MB_4U | _PAGE_SZ256MB_4U);
2174
2175
2176 page_none = _PAGE_PRESENT_4U | _PAGE_ACCESSED_4U | _PAGE_CACHE_4U;
2177 page_shared = (_PAGE_VALID | _PAGE_PRESENT_4U | _PAGE_CACHE_4U |
2178 __ACCESS_BITS_4U | _PAGE_WRITE_4U | _PAGE_EXEC_4U);
2179 page_copy = (_PAGE_VALID | _PAGE_PRESENT_4U | _PAGE_CACHE_4U |
2180 __ACCESS_BITS_4U | _PAGE_EXEC_4U);
2181 page_readonly = (_PAGE_VALID | _PAGE_PRESENT_4U | _PAGE_CACHE_4U |
2182 __ACCESS_BITS_4U | _PAGE_EXEC_4U);
2183
2184 page_exec_bit = _PAGE_EXEC_4U;
2185
2186 prot_init_common(page_none, page_shared, page_copy, page_readonly,
2187 page_exec_bit);
2188}
2189
2190static void __init sun4v_pgprot_init(void)
2191{
2192 unsigned long page_none, page_shared, page_copy, page_readonly;
2193 unsigned long page_exec_bit;
2194
2195 PAGE_KERNEL = __pgprot (_PAGE_PRESENT_4V | _PAGE_VALID |
2196 _PAGE_CACHE_4V | _PAGE_P_4V |
2197 __ACCESS_BITS_4V | __DIRTY_BITS_4V |
2198 _PAGE_EXEC_4V);
2199 PAGE_KERNEL_LOCKED = PAGE_KERNEL;
2200
2201 _PAGE_IE = _PAGE_IE_4V;
2202 _PAGE_E = _PAGE_E_4V;
2203 _PAGE_CACHE = _PAGE_CACHE_4V;
2204
2205#ifdef CONFIG_DEBUG_PAGEALLOC
2206 kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZBITS_4V) ^
2207 0xfffff80000000000UL;
2208#else
2209 kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZ4MB_4V) ^
2210 0xfffff80000000000UL;
2211#endif
2212 kern_linear_pte_xor[0] |= (_PAGE_CP_4V | _PAGE_CV_4V |
2213 _PAGE_P_4V | _PAGE_W_4V);
2214
2215#ifdef CONFIG_DEBUG_PAGEALLOC
2216 kern_linear_pte_xor[1] = (_PAGE_VALID | _PAGE_SZBITS_4V) ^
2217 0xfffff80000000000UL;
2218#else
2219 kern_linear_pte_xor[1] = (_PAGE_VALID | _PAGE_SZ256MB_4V) ^
2220 0xfffff80000000000UL;
2221#endif
2222 kern_linear_pte_xor[1] |= (_PAGE_CP_4V | _PAGE_CV_4V |
2223 _PAGE_P_4V | _PAGE_W_4V);
2224
2225 pg_iobits = (_PAGE_VALID | _PAGE_PRESENT_4V | __DIRTY_BITS_4V |
2226 __ACCESS_BITS_4V | _PAGE_E_4V);
2227
2228 _PAGE_SZBITS = _PAGE_SZBITS_4V;
2229 _PAGE_ALL_SZ_BITS = (_PAGE_SZ16GB_4V | _PAGE_SZ2GB_4V |
2230 _PAGE_SZ256MB_4V | _PAGE_SZ32MB_4V |
2231 _PAGE_SZ4MB_4V | _PAGE_SZ512K_4V |
2232 _PAGE_SZ64K_4V | _PAGE_SZ8K_4V);
2233
2234 page_none = _PAGE_PRESENT_4V | _PAGE_ACCESSED_4V | _PAGE_CACHE_4V;
2235 page_shared = (_PAGE_VALID | _PAGE_PRESENT_4V | _PAGE_CACHE_4V |
2236 __ACCESS_BITS_4V | _PAGE_WRITE_4V | _PAGE_EXEC_4V);
2237 page_copy = (_PAGE_VALID | _PAGE_PRESENT_4V | _PAGE_CACHE_4V |
2238 __ACCESS_BITS_4V | _PAGE_EXEC_4V);
2239 page_readonly = (_PAGE_VALID | _PAGE_PRESENT_4V | _PAGE_CACHE_4V |
2240 __ACCESS_BITS_4V | _PAGE_EXEC_4V);
2241
2242 page_exec_bit = _PAGE_EXEC_4V;
2243
2244 prot_init_common(page_none, page_shared, page_copy, page_readonly,
2245 page_exec_bit);
2246}
2247
2248unsigned long pte_sz_bits(unsigned long sz)
2249{
2250 if (tlb_type == hypervisor) {
2251 switch (sz) {
2252 case 8 * 1024:
2253 default:
2254 return _PAGE_SZ8K_4V;
2255 case 64 * 1024:
2256 return _PAGE_SZ64K_4V;
2257 case 512 * 1024:
2258 return _PAGE_SZ512K_4V;
2259 case 4 * 1024 * 1024:
2260 return _PAGE_SZ4MB_4V;
2261 };
2262 } else {
2263 switch (sz) {
2264 case 8 * 1024:
2265 default:
2266 return _PAGE_SZ8K_4U;
2267 case 64 * 1024:
2268 return _PAGE_SZ64K_4U;
2269 case 512 * 1024:
2270 return _PAGE_SZ512K_4U;
2271 case 4 * 1024 * 1024:
2272 return _PAGE_SZ4MB_4U;
2273 };
2274 }
2275}
2276
2277pte_t mk_pte_io(unsigned long page, pgprot_t prot, int space, unsigned long page_size)
2278{
2279 pte_t pte;
2280
2281 pte_val(pte) = page | pgprot_val(pgprot_noncached(prot));
2282 pte_val(pte) |= (((unsigned long)space) << 32);
2283 pte_val(pte) |= pte_sz_bits(page_size);
2284
2285 return pte;
2286}
2287
2288static unsigned long kern_large_tte(unsigned long paddr)
2289{
2290 unsigned long val;
2291
2292 val = (_PAGE_VALID | _PAGE_SZ4MB_4U |
2293 _PAGE_CP_4U | _PAGE_CV_4U | _PAGE_P_4U |
2294 _PAGE_EXEC_4U | _PAGE_L_4U | _PAGE_W_4U);
2295 if (tlb_type == hypervisor)
2296 val = (_PAGE_VALID | _PAGE_SZ4MB_4V |
2297 _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_P_4V |
2298 _PAGE_EXEC_4V | _PAGE_W_4V);
2299
2300 return val | paddr;
2301}
2302
2303/* If not locked, zap it. */
2304void __flush_tlb_all(void)
2305{
2306 unsigned long pstate;
2307 int i;
2308
2309 __asm__ __volatile__("flushw\n\t"
2310 "rdpr %%pstate, %0\n\t"
2311 "wrpr %0, %1, %%pstate"
2312 : "=r" (pstate)
2313 : "i" (PSTATE_IE));
2314 if (tlb_type == hypervisor) {
2315 sun4v_mmu_demap_all();
2316 } else if (tlb_type == spitfire) {
2317 for (i = 0; i < 64; i++) {
2318 /* Spitfire Errata #32 workaround */
2319 /* NOTE: Always runs on spitfire, so no
2320 * cheetah+ page size encodings.
2321 */
2322 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
2323 "flush %%g6"
2324 : /* No outputs */
2325 : "r" (0),
2326 "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
2327
2328 if (!(spitfire_get_dtlb_data(i) & _PAGE_L_4U)) {
2329 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
2330 "membar #Sync"
2331 : /* no outputs */
2332 : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU));
2333 spitfire_put_dtlb_data(i, 0x0UL);
2334 }
2335
2336 /* Spitfire Errata #32 workaround */
2337 /* NOTE: Always runs on spitfire, so no
2338 * cheetah+ page size encodings.
2339 */
2340 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
2341 "flush %%g6"
2342 : /* No outputs */
2343 : "r" (0),
2344 "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
2345
2346 if (!(spitfire_get_itlb_data(i) & _PAGE_L_4U)) {
2347 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
2348 "membar #Sync"
2349 : /* no outputs */
2350 : "r" (TLB_TAG_ACCESS), "i" (ASI_IMMU));
2351 spitfire_put_itlb_data(i, 0x0UL);
2352 }
2353 }
2354 } else if (tlb_type == cheetah || tlb_type == cheetah_plus) {
2355 cheetah_flush_dtlb_all();
2356 cheetah_flush_itlb_all();
2357 }
2358 __asm__ __volatile__("wrpr %0, 0, %%pstate"
2359 : : "r" (pstate));
2360}
diff --git a/arch/sparc/mm/init_64.h b/arch/sparc/mm/init_64.h
new file mode 100644
index 000000000000..16063870a489
--- /dev/null
+++ b/arch/sparc/mm/init_64.h
@@ -0,0 +1,49 @@
1#ifndef _SPARC64_MM_INIT_H
2#define _SPARC64_MM_INIT_H
3
4/* Most of the symbols in this file are defined in init.c and
5 * marked non-static so that assembler code can get at them.
6 */
7
8#define MAX_PHYS_ADDRESS (1UL << 42UL)
9#define KPTE_BITMAP_CHUNK_SZ (256UL * 1024UL * 1024UL)
10#define KPTE_BITMAP_BYTES \
11 ((MAX_PHYS_ADDRESS / KPTE_BITMAP_CHUNK_SZ) / 8)
12
13extern unsigned long kern_linear_pte_xor[2];
14extern unsigned long kpte_linear_bitmap[KPTE_BITMAP_BYTES / sizeof(unsigned long)];
15extern unsigned int sparc64_highest_unlocked_tlb_ent;
16extern unsigned long sparc64_kern_pri_context;
17extern unsigned long sparc64_kern_pri_nuc_bits;
18extern unsigned long sparc64_kern_sec_context;
19extern void mmu_info(struct seq_file *m);
20
21struct linux_prom_translation {
22 unsigned long virt;
23 unsigned long size;
24 unsigned long data;
25};
26
27/* Exported for kernel TLB miss handling in ktlb.S */
28extern struct linux_prom_translation prom_trans[512];
29extern unsigned int prom_trans_ents;
30
31/* Exported for SMP bootup purposes. */
32extern unsigned long kern_locked_tte_data;
33
34extern void prom_world(int enter);
35
36extern void free_initmem(void);
37
38#ifdef CONFIG_SPARSEMEM_VMEMMAP
39#define VMEMMAP_CHUNK_SHIFT 22
40#define VMEMMAP_CHUNK (1UL << VMEMMAP_CHUNK_SHIFT)
41#define VMEMMAP_CHUNK_MASK ~(VMEMMAP_CHUNK - 1UL)
42#define VMEMMAP_ALIGN(x) (((x)+VMEMMAP_CHUNK-1UL)&VMEMMAP_CHUNK_MASK)
43
44#define VMEMMAP_SIZE ((((1UL << MAX_PHYSADDR_BITS) >> PAGE_SHIFT) * \
45 sizeof(struct page *)) >> VMEMMAP_CHUNK_SHIFT)
46extern unsigned long vmemmap_table[VMEMMAP_SIZE];
47#endif
48
49#endif /* _SPARC64_MM_INIT_H */
diff --git a/arch/sparc/mm/tlb.c b/arch/sparc/mm/tlb.c
new file mode 100644
index 000000000000..d8f21e24a82f
--- /dev/null
+++ b/arch/sparc/mm/tlb.c
@@ -0,0 +1,97 @@
1/* arch/sparc64/mm/tlb.c
2 *
3 * Copyright (C) 2004 David S. Miller <davem@redhat.com>
4 */
5
6#include <linux/kernel.h>
7#include <linux/init.h>
8#include <linux/percpu.h>
9#include <linux/mm.h>
10#include <linux/swap.h>
11#include <linux/preempt.h>
12
13#include <asm/pgtable.h>
14#include <asm/pgalloc.h>
15#include <asm/tlbflush.h>
16#include <asm/cacheflush.h>
17#include <asm/mmu_context.h>
18#include <asm/tlb.h>
19
20/* Heavily inspired by the ppc64 code. */
21
22DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
23
24void flush_tlb_pending(void)
25{
26 struct mmu_gather *mp = &get_cpu_var(mmu_gathers);
27
28 if (mp->tlb_nr) {
29 flush_tsb_user(mp);
30
31 if (CTX_VALID(mp->mm->context)) {
32#ifdef CONFIG_SMP
33 smp_flush_tlb_pending(mp->mm, mp->tlb_nr,
34 &mp->vaddrs[0]);
35#else
36 __flush_tlb_pending(CTX_HWBITS(mp->mm->context),
37 mp->tlb_nr, &mp->vaddrs[0]);
38#endif
39 }
40 mp->tlb_nr = 0;
41 }
42
43 put_cpu_var(mmu_gathers);
44}
45
46void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr, pte_t *ptep, pte_t orig)
47{
48 struct mmu_gather *mp = &__get_cpu_var(mmu_gathers);
49 unsigned long nr;
50
51 vaddr &= PAGE_MASK;
52 if (pte_exec(orig))
53 vaddr |= 0x1UL;
54
55 if (tlb_type != hypervisor &&
56 pte_dirty(orig)) {
57 unsigned long paddr, pfn = pte_pfn(orig);
58 struct address_space *mapping;
59 struct page *page;
60
61 if (!pfn_valid(pfn))
62 goto no_cache_flush;
63
64 page = pfn_to_page(pfn);
65 if (PageReserved(page))
66 goto no_cache_flush;
67
68 /* A real file page? */
69 mapping = page_mapping(page);
70 if (!mapping)
71 goto no_cache_flush;
72
73 paddr = (unsigned long) page_address(page);
74 if ((paddr ^ vaddr) & (1 << 13))
75 flush_dcache_page_all(mm, page);
76 }
77
78no_cache_flush:
79
80 if (mp->fullmm)
81 return;
82
83 nr = mp->tlb_nr;
84
85 if (unlikely(nr != 0 && mm != mp->mm)) {
86 flush_tlb_pending();
87 nr = 0;
88 }
89
90 if (nr == 0)
91 mp->mm = mm;
92
93 mp->vaddrs[nr] = vaddr;
94 mp->tlb_nr = ++nr;
95 if (nr >= TLB_BATCH_NR)
96 flush_tlb_pending();
97}
diff --git a/arch/sparc/mm/tsb.c b/arch/sparc/mm/tsb.c
new file mode 100644
index 000000000000..f0282fad632a
--- /dev/null
+++ b/arch/sparc/mm/tsb.c
@@ -0,0 +1,496 @@
1/* arch/sparc64/mm/tsb.c
2 *
3 * Copyright (C) 2006, 2008 David S. Miller <davem@davemloft.net>
4 */
5
6#include <linux/kernel.h>
7#include <linux/preempt.h>
8#include <asm/system.h>
9#include <asm/page.h>
10#include <asm/tlbflush.h>
11#include <asm/tlb.h>
12#include <asm/mmu_context.h>
13#include <asm/pgtable.h>
14#include <asm/tsb.h>
15#include <asm/oplib.h>
16
17extern struct tsb swapper_tsb[KERNEL_TSB_NENTRIES];
18
19static inline unsigned long tsb_hash(unsigned long vaddr, unsigned long hash_shift, unsigned long nentries)
20{
21 vaddr >>= hash_shift;
22 return vaddr & (nentries - 1);
23}
24
25static inline int tag_compare(unsigned long tag, unsigned long vaddr)
26{
27 return (tag == (vaddr >> 22));
28}
29
30/* TSB flushes need only occur on the processor initiating the address
31 * space modification, not on each cpu the address space has run on.
32 * Only the TLB flush needs that treatment.
33 */
34
35void flush_tsb_kernel_range(unsigned long start, unsigned long end)
36{
37 unsigned long v;
38
39 for (v = start; v < end; v += PAGE_SIZE) {
40 unsigned long hash = tsb_hash(v, PAGE_SHIFT,
41 KERNEL_TSB_NENTRIES);
42 struct tsb *ent = &swapper_tsb[hash];
43
44 if (tag_compare(ent->tag, v))
45 ent->tag = (1UL << TSB_TAG_INVALID_BIT);
46 }
47}
48
49static void __flush_tsb_one(struct mmu_gather *mp, unsigned long hash_shift, unsigned long tsb, unsigned long nentries)
50{
51 unsigned long i;
52
53 for (i = 0; i < mp->tlb_nr; i++) {
54 unsigned long v = mp->vaddrs[i];
55 unsigned long tag, ent, hash;
56
57 v &= ~0x1UL;
58
59 hash = tsb_hash(v, hash_shift, nentries);
60 ent = tsb + (hash * sizeof(struct tsb));
61 tag = (v >> 22UL);
62
63 tsb_flush(ent, tag);
64 }
65}
66
67void flush_tsb_user(struct mmu_gather *mp)
68{
69 struct mm_struct *mm = mp->mm;
70 unsigned long nentries, base, flags;
71
72 spin_lock_irqsave(&mm->context.lock, flags);
73
74 base = (unsigned long) mm->context.tsb_block[MM_TSB_BASE].tsb;
75 nentries = mm->context.tsb_block[MM_TSB_BASE].tsb_nentries;
76 if (tlb_type == cheetah_plus || tlb_type == hypervisor)
77 base = __pa(base);
78 __flush_tsb_one(mp, PAGE_SHIFT, base, nentries);
79
80#ifdef CONFIG_HUGETLB_PAGE
81 if (mm->context.tsb_block[MM_TSB_HUGE].tsb) {
82 base = (unsigned long) mm->context.tsb_block[MM_TSB_HUGE].tsb;
83 nentries = mm->context.tsb_block[MM_TSB_HUGE].tsb_nentries;
84 if (tlb_type == cheetah_plus || tlb_type == hypervisor)
85 base = __pa(base);
86 __flush_tsb_one(mp, HPAGE_SHIFT, base, nentries);
87 }
88#endif
89 spin_unlock_irqrestore(&mm->context.lock, flags);
90}
91
92#if defined(CONFIG_SPARC64_PAGE_SIZE_8KB)
93#define HV_PGSZ_IDX_BASE HV_PGSZ_IDX_8K
94#define HV_PGSZ_MASK_BASE HV_PGSZ_MASK_8K
95#elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB)
96#define HV_PGSZ_IDX_BASE HV_PGSZ_IDX_64K
97#define HV_PGSZ_MASK_BASE HV_PGSZ_MASK_64K
98#else
99#error Broken base page size setting...
100#endif
101
102#ifdef CONFIG_HUGETLB_PAGE
103#if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
104#define HV_PGSZ_IDX_HUGE HV_PGSZ_IDX_64K
105#define HV_PGSZ_MASK_HUGE HV_PGSZ_MASK_64K
106#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
107#define HV_PGSZ_IDX_HUGE HV_PGSZ_IDX_512K
108#define HV_PGSZ_MASK_HUGE HV_PGSZ_MASK_512K
109#elif defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
110#define HV_PGSZ_IDX_HUGE HV_PGSZ_IDX_4MB
111#define HV_PGSZ_MASK_HUGE HV_PGSZ_MASK_4MB
112#else
113#error Broken huge page size setting...
114#endif
115#endif
116
117static void setup_tsb_params(struct mm_struct *mm, unsigned long tsb_idx, unsigned long tsb_bytes)
118{
119 unsigned long tsb_reg, base, tsb_paddr;
120 unsigned long page_sz, tte;
121
122 mm->context.tsb_block[tsb_idx].tsb_nentries =
123 tsb_bytes / sizeof(struct tsb);
124
125 base = TSBMAP_BASE;
126 tte = pgprot_val(PAGE_KERNEL_LOCKED);
127 tsb_paddr = __pa(mm->context.tsb_block[tsb_idx].tsb);
128 BUG_ON(tsb_paddr & (tsb_bytes - 1UL));
129
130 /* Use the smallest page size that can map the whole TSB
131 * in one TLB entry.
132 */
133 switch (tsb_bytes) {
134 case 8192 << 0:
135 tsb_reg = 0x0UL;
136#ifdef DCACHE_ALIASING_POSSIBLE
137 base += (tsb_paddr & 8192);
138#endif
139 page_sz = 8192;
140 break;
141
142 case 8192 << 1:
143 tsb_reg = 0x1UL;
144 page_sz = 64 * 1024;
145 break;
146
147 case 8192 << 2:
148 tsb_reg = 0x2UL;
149 page_sz = 64 * 1024;
150 break;
151
152 case 8192 << 3:
153 tsb_reg = 0x3UL;
154 page_sz = 64 * 1024;
155 break;
156
157 case 8192 << 4:
158 tsb_reg = 0x4UL;
159 page_sz = 512 * 1024;
160 break;
161
162 case 8192 << 5:
163 tsb_reg = 0x5UL;
164 page_sz = 512 * 1024;
165 break;
166
167 case 8192 << 6:
168 tsb_reg = 0x6UL;
169 page_sz = 512 * 1024;
170 break;
171
172 case 8192 << 7:
173 tsb_reg = 0x7UL;
174 page_sz = 4 * 1024 * 1024;
175 break;
176
177 default:
178 printk(KERN_ERR "TSB[%s:%d]: Impossible TSB size %lu, killing process.\n",
179 current->comm, current->pid, tsb_bytes);
180 do_exit(SIGSEGV);
181 };
182 tte |= pte_sz_bits(page_sz);
183
184 if (tlb_type == cheetah_plus || tlb_type == hypervisor) {
185 /* Physical mapping, no locked TLB entry for TSB. */
186 tsb_reg |= tsb_paddr;
187
188 mm->context.tsb_block[tsb_idx].tsb_reg_val = tsb_reg;
189 mm->context.tsb_block[tsb_idx].tsb_map_vaddr = 0;
190 mm->context.tsb_block[tsb_idx].tsb_map_pte = 0;
191 } else {
192 tsb_reg |= base;
193 tsb_reg |= (tsb_paddr & (page_sz - 1UL));
194 tte |= (tsb_paddr & ~(page_sz - 1UL));
195
196 mm->context.tsb_block[tsb_idx].tsb_reg_val = tsb_reg;
197 mm->context.tsb_block[tsb_idx].tsb_map_vaddr = base;
198 mm->context.tsb_block[tsb_idx].tsb_map_pte = tte;
199 }
200
201 /* Setup the Hypervisor TSB descriptor. */
202 if (tlb_type == hypervisor) {
203 struct hv_tsb_descr *hp = &mm->context.tsb_descr[tsb_idx];
204
205 switch (tsb_idx) {
206 case MM_TSB_BASE:
207 hp->pgsz_idx = HV_PGSZ_IDX_BASE;
208 break;
209#ifdef CONFIG_HUGETLB_PAGE
210 case MM_TSB_HUGE:
211 hp->pgsz_idx = HV_PGSZ_IDX_HUGE;
212 break;
213#endif
214 default:
215 BUG();
216 };
217 hp->assoc = 1;
218 hp->num_ttes = tsb_bytes / 16;
219 hp->ctx_idx = 0;
220 switch (tsb_idx) {
221 case MM_TSB_BASE:
222 hp->pgsz_mask = HV_PGSZ_MASK_BASE;
223 break;
224#ifdef CONFIG_HUGETLB_PAGE
225 case MM_TSB_HUGE:
226 hp->pgsz_mask = HV_PGSZ_MASK_HUGE;
227 break;
228#endif
229 default:
230 BUG();
231 };
232 hp->tsb_base = tsb_paddr;
233 hp->resv = 0;
234 }
235}
236
237static struct kmem_cache *tsb_caches[8] __read_mostly;
238
239static const char *tsb_cache_names[8] = {
240 "tsb_8KB",
241 "tsb_16KB",
242 "tsb_32KB",
243 "tsb_64KB",
244 "tsb_128KB",
245 "tsb_256KB",
246 "tsb_512KB",
247 "tsb_1MB",
248};
249
250void __init pgtable_cache_init(void)
251{
252 unsigned long i;
253
254 for (i = 0; i < 8; i++) {
255 unsigned long size = 8192 << i;
256 const char *name = tsb_cache_names[i];
257
258 tsb_caches[i] = kmem_cache_create(name,
259 size, size,
260 0, NULL);
261 if (!tsb_caches[i]) {
262 prom_printf("Could not create %s cache\n", name);
263 prom_halt();
264 }
265 }
266}
267
268/* When the RSS of an address space exceeds tsb_rss_limit for a TSB,
269 * do_sparc64_fault() invokes this routine to try and grow it.
270 *
271 * When we reach the maximum TSB size supported, we stick ~0UL into
272 * tsb_rss_limit for that TSB so the grow checks in do_sparc64_fault()
273 * will not trigger any longer.
274 *
275 * The TSB can be anywhere from 8K to 1MB in size, in increasing powers
276 * of two. The TSB must be aligned to it's size, so f.e. a 512K TSB
277 * must be 512K aligned. It also must be physically contiguous, so we
278 * cannot use vmalloc().
279 *
280 * The idea here is to grow the TSB when the RSS of the process approaches
281 * the number of entries that the current TSB can hold at once. Currently,
282 * we trigger when the RSS hits 3/4 of the TSB capacity.
283 */
284void tsb_grow(struct mm_struct *mm, unsigned long tsb_index, unsigned long rss)
285{
286 unsigned long max_tsb_size = 1 * 1024 * 1024;
287 unsigned long new_size, old_size, flags;
288 struct tsb *old_tsb, *new_tsb;
289 unsigned long new_cache_index, old_cache_index;
290 unsigned long new_rss_limit;
291 gfp_t gfp_flags;
292
293 if (max_tsb_size > (PAGE_SIZE << MAX_ORDER))
294 max_tsb_size = (PAGE_SIZE << MAX_ORDER);
295
296 new_cache_index = 0;
297 for (new_size = 8192; new_size < max_tsb_size; new_size <<= 1UL) {
298 unsigned long n_entries = new_size / sizeof(struct tsb);
299
300 n_entries = (n_entries * 3) / 4;
301 if (n_entries > rss)
302 break;
303
304 new_cache_index++;
305 }
306
307 if (new_size == max_tsb_size)
308 new_rss_limit = ~0UL;
309 else
310 new_rss_limit = ((new_size / sizeof(struct tsb)) * 3) / 4;
311
312retry_tsb_alloc:
313 gfp_flags = GFP_KERNEL;
314 if (new_size > (PAGE_SIZE * 2))
315 gfp_flags = __GFP_NOWARN | __GFP_NORETRY;
316
317 new_tsb = kmem_cache_alloc_node(tsb_caches[new_cache_index],
318 gfp_flags, numa_node_id());
319 if (unlikely(!new_tsb)) {
320 /* Not being able to fork due to a high-order TSB
321 * allocation failure is very bad behavior. Just back
322 * down to a 0-order allocation and force no TSB
323 * growing for this address space.
324 */
325 if (mm->context.tsb_block[tsb_index].tsb == NULL &&
326 new_cache_index > 0) {
327 new_cache_index = 0;
328 new_size = 8192;
329 new_rss_limit = ~0UL;
330 goto retry_tsb_alloc;
331 }
332
333 /* If we failed on a TSB grow, we are under serious
334 * memory pressure so don't try to grow any more.
335 */
336 if (mm->context.tsb_block[tsb_index].tsb != NULL)
337 mm->context.tsb_block[tsb_index].tsb_rss_limit = ~0UL;
338 return;
339 }
340
341 /* Mark all tags as invalid. */
342 tsb_init(new_tsb, new_size);
343
344 /* Ok, we are about to commit the changes. If we are
345 * growing an existing TSB the locking is very tricky,
346 * so WATCH OUT!
347 *
348 * We have to hold mm->context.lock while committing to the
349 * new TSB, this synchronizes us with processors in
350 * flush_tsb_user() and switch_mm() for this address space.
351 *
352 * But even with that lock held, processors run asynchronously
353 * accessing the old TSB via TLB miss handling. This is OK
354 * because those actions are just propagating state from the
355 * Linux page tables into the TSB, page table mappings are not
356 * being changed. If a real fault occurs, the processor will
357 * synchronize with us when it hits flush_tsb_user(), this is
358 * also true for the case where vmscan is modifying the page
359 * tables. The only thing we need to be careful with is to
360 * skip any locked TSB entries during copy_tsb().
361 *
362 * When we finish committing to the new TSB, we have to drop
363 * the lock and ask all other cpus running this address space
364 * to run tsb_context_switch() to see the new TSB table.
365 */
366 spin_lock_irqsave(&mm->context.lock, flags);
367
368 old_tsb = mm->context.tsb_block[tsb_index].tsb;
369 old_cache_index =
370 (mm->context.tsb_block[tsb_index].tsb_reg_val & 0x7UL);
371 old_size = (mm->context.tsb_block[tsb_index].tsb_nentries *
372 sizeof(struct tsb));
373
374
375 /* Handle multiple threads trying to grow the TSB at the same time.
376 * One will get in here first, and bump the size and the RSS limit.
377 * The others will get in here next and hit this check.
378 */
379 if (unlikely(old_tsb &&
380 (rss < mm->context.tsb_block[tsb_index].tsb_rss_limit))) {
381 spin_unlock_irqrestore(&mm->context.lock, flags);
382
383 kmem_cache_free(tsb_caches[new_cache_index], new_tsb);
384 return;
385 }
386
387 mm->context.tsb_block[tsb_index].tsb_rss_limit = new_rss_limit;
388
389 if (old_tsb) {
390 extern void copy_tsb(unsigned long old_tsb_base,
391 unsigned long old_tsb_size,
392 unsigned long new_tsb_base,
393 unsigned long new_tsb_size);
394 unsigned long old_tsb_base = (unsigned long) old_tsb;
395 unsigned long new_tsb_base = (unsigned long) new_tsb;
396
397 if (tlb_type == cheetah_plus || tlb_type == hypervisor) {
398 old_tsb_base = __pa(old_tsb_base);
399 new_tsb_base = __pa(new_tsb_base);
400 }
401 copy_tsb(old_tsb_base, old_size, new_tsb_base, new_size);
402 }
403
404 mm->context.tsb_block[tsb_index].tsb = new_tsb;
405 setup_tsb_params(mm, tsb_index, new_size);
406
407 spin_unlock_irqrestore(&mm->context.lock, flags);
408
409 /* If old_tsb is NULL, we're being invoked for the first time
410 * from init_new_context().
411 */
412 if (old_tsb) {
413 /* Reload it on the local cpu. */
414 tsb_context_switch(mm);
415
416 /* Now force other processors to do the same. */
417 preempt_disable();
418 smp_tsb_sync(mm);
419 preempt_enable();
420
421 /* Now it is safe to free the old tsb. */
422 kmem_cache_free(tsb_caches[old_cache_index], old_tsb);
423 }
424}
425
426int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
427{
428#ifdef CONFIG_HUGETLB_PAGE
429 unsigned long huge_pte_count;
430#endif
431 unsigned int i;
432
433 spin_lock_init(&mm->context.lock);
434
435 mm->context.sparc64_ctx_val = 0UL;
436
437#ifdef CONFIG_HUGETLB_PAGE
438 /* We reset it to zero because the fork() page copying
439 * will re-increment the counters as the parent PTEs are
440 * copied into the child address space.
441 */
442 huge_pte_count = mm->context.huge_pte_count;
443 mm->context.huge_pte_count = 0;
444#endif
445
446 /* copy_mm() copies over the parent's mm_struct before calling
447 * us, so we need to zero out the TSB pointer or else tsb_grow()
448 * will be confused and think there is an older TSB to free up.
449 */
450 for (i = 0; i < MM_NUM_TSBS; i++)
451 mm->context.tsb_block[i].tsb = NULL;
452
453 /* If this is fork, inherit the parent's TSB size. We would
454 * grow it to that size on the first page fault anyways.
455 */
456 tsb_grow(mm, MM_TSB_BASE, get_mm_rss(mm));
457
458#ifdef CONFIG_HUGETLB_PAGE
459 if (unlikely(huge_pte_count))
460 tsb_grow(mm, MM_TSB_HUGE, huge_pte_count);
461#endif
462
463 if (unlikely(!mm->context.tsb_block[MM_TSB_BASE].tsb))
464 return -ENOMEM;
465
466 return 0;
467}
468
469static void tsb_destroy_one(struct tsb_config *tp)
470{
471 unsigned long cache_index;
472
473 if (!tp->tsb)
474 return;
475 cache_index = tp->tsb_reg_val & 0x7UL;
476 kmem_cache_free(tsb_caches[cache_index], tp->tsb);
477 tp->tsb = NULL;
478 tp->tsb_reg_val = 0UL;
479}
480
481void destroy_context(struct mm_struct *mm)
482{
483 unsigned long flags, i;
484
485 for (i = 0; i < MM_NUM_TSBS; i++)
486 tsb_destroy_one(&mm->context.tsb_block[i]);
487
488 spin_lock_irqsave(&ctx_alloc_lock, flags);
489
490 if (CTX_VALID(mm->context)) {
491 unsigned long nr = CTX_NRBITS(mm->context);
492 mmu_context_bmap[nr>>6] &= ~(1UL << (nr & 63));
493 }
494
495 spin_unlock_irqrestore(&ctx_alloc_lock, flags);
496}
diff --git a/arch/sparc/mm/ultra.S b/arch/sparc/mm/ultra.S
new file mode 100644
index 000000000000..e4c146f7c7e9
--- /dev/null
+++ b/arch/sparc/mm/ultra.S
@@ -0,0 +1,767 @@
1/*
2 * ultra.S: Don't expand these all over the place...
3 *
4 * Copyright (C) 1997, 2000, 2008 David S. Miller (davem@davemloft.net)
5 */
6
7#include <asm/asi.h>
8#include <asm/pgtable.h>
9#include <asm/page.h>
10#include <asm/spitfire.h>
11#include <asm/mmu_context.h>
12#include <asm/mmu.h>
13#include <asm/pil.h>
14#include <asm/head.h>
15#include <asm/thread_info.h>
16#include <asm/cacheflush.h>
17#include <asm/hypervisor.h>
18#include <asm/cpudata.h>
19
20 /* Basically, most of the Spitfire vs. Cheetah madness
21 * has to do with the fact that Cheetah does not support
22 * IMMU flushes out of the secondary context. Someone needs
23 * to throw a south lake birthday party for the folks
24 * in Microelectronics who refused to fix this shit.
25 */
26
27 /* This file is meant to be read efficiently by the CPU, not humans.
28 * Staraj sie tego nikomu nie pierdolnac...
29 */
30 .text
31 .align 32
32 .globl __flush_tlb_mm
33__flush_tlb_mm: /* 18 insns */
34 /* %o0=(ctx & TAG_CONTEXT_BITS), %o1=SECONDARY_CONTEXT */
35 ldxa [%o1] ASI_DMMU, %g2
36 cmp %g2, %o0
37 bne,pn %icc, __spitfire_flush_tlb_mm_slow
38 mov 0x50, %g3
39 stxa %g0, [%g3] ASI_DMMU_DEMAP
40 stxa %g0, [%g3] ASI_IMMU_DEMAP
41 sethi %hi(KERNBASE), %g3
42 flush %g3
43 retl
44 nop
45 nop
46 nop
47 nop
48 nop
49 nop
50 nop
51 nop
52 nop
53 nop
54
55 .align 32
56 .globl __flush_tlb_pending
57__flush_tlb_pending: /* 26 insns */
58 /* %o0 = context, %o1 = nr, %o2 = vaddrs[] */
59 rdpr %pstate, %g7
60 sllx %o1, 3, %o1
61 andn %g7, PSTATE_IE, %g2
62 wrpr %g2, %pstate
63 mov SECONDARY_CONTEXT, %o4
64 ldxa [%o4] ASI_DMMU, %g2
65 stxa %o0, [%o4] ASI_DMMU
661: sub %o1, (1 << 3), %o1
67 ldx [%o2 + %o1], %o3
68 andcc %o3, 1, %g0
69 andn %o3, 1, %o3
70 be,pn %icc, 2f
71 or %o3, 0x10, %o3
72 stxa %g0, [%o3] ASI_IMMU_DEMAP
732: stxa %g0, [%o3] ASI_DMMU_DEMAP
74 membar #Sync
75 brnz,pt %o1, 1b
76 nop
77 stxa %g2, [%o4] ASI_DMMU
78 sethi %hi(KERNBASE), %o4
79 flush %o4
80 retl
81 wrpr %g7, 0x0, %pstate
82 nop
83 nop
84 nop
85 nop
86
87 .align 32
88 .globl __flush_tlb_kernel_range
89__flush_tlb_kernel_range: /* 16 insns */
90 /* %o0=start, %o1=end */
91 cmp %o0, %o1
92 be,pn %xcc, 2f
93 sethi %hi(PAGE_SIZE), %o4
94 sub %o1, %o0, %o3
95 sub %o3, %o4, %o3
96 or %o0, 0x20, %o0 ! Nucleus
971: stxa %g0, [%o0 + %o3] ASI_DMMU_DEMAP
98 stxa %g0, [%o0 + %o3] ASI_IMMU_DEMAP
99 membar #Sync
100 brnz,pt %o3, 1b
101 sub %o3, %o4, %o3
1022: sethi %hi(KERNBASE), %o3
103 flush %o3
104 retl
105 nop
106 nop
107
108__spitfire_flush_tlb_mm_slow:
109 rdpr %pstate, %g1
110 wrpr %g1, PSTATE_IE, %pstate
111 stxa %o0, [%o1] ASI_DMMU
112 stxa %g0, [%g3] ASI_DMMU_DEMAP
113 stxa %g0, [%g3] ASI_IMMU_DEMAP
114 flush %g6
115 stxa %g2, [%o1] ASI_DMMU
116 sethi %hi(KERNBASE), %o1
117 flush %o1
118 retl
119 wrpr %g1, 0, %pstate
120
121/*
122 * The following code flushes one page_size worth.
123 */
124 .section .kprobes.text, "ax"
125 .align 32
126 .globl __flush_icache_page
127__flush_icache_page: /* %o0 = phys_page */
128 srlx %o0, PAGE_SHIFT, %o0
129 sethi %uhi(PAGE_OFFSET), %g1
130 sllx %o0, PAGE_SHIFT, %o0
131 sethi %hi(PAGE_SIZE), %g2
132 sllx %g1, 32, %g1
133 add %o0, %g1, %o0
1341: subcc %g2, 32, %g2
135 bne,pt %icc, 1b
136 flush %o0 + %g2
137 retl
138 nop
139
140#ifdef DCACHE_ALIASING_POSSIBLE
141
142#if (PAGE_SHIFT != 13)
143#error only page shift of 13 is supported by dcache flush
144#endif
145
146#define DTAG_MASK 0x3
147
148 /* This routine is Spitfire specific so the hardcoded
149 * D-cache size and line-size are OK.
150 */
151 .align 64
152 .globl __flush_dcache_page
153__flush_dcache_page: /* %o0=kaddr, %o1=flush_icache */
154 sethi %uhi(PAGE_OFFSET), %g1
155 sllx %g1, 32, %g1
156 sub %o0, %g1, %o0 ! physical address
157 srlx %o0, 11, %o0 ! make D-cache TAG
158 sethi %hi(1 << 14), %o2 ! D-cache size
159 sub %o2, (1 << 5), %o2 ! D-cache line size
1601: ldxa [%o2] ASI_DCACHE_TAG, %o3 ! load D-cache TAG
161 andcc %o3, DTAG_MASK, %g0 ! Valid?
162 be,pn %xcc, 2f ! Nope, branch
163 andn %o3, DTAG_MASK, %o3 ! Clear valid bits
164 cmp %o3, %o0 ! TAG match?
165 bne,pt %xcc, 2f ! Nope, branch
166 nop
167 stxa %g0, [%o2] ASI_DCACHE_TAG ! Invalidate TAG
168 membar #Sync
1692: brnz,pt %o2, 1b
170 sub %o2, (1 << 5), %o2 ! D-cache line size
171
172 /* The I-cache does not snoop local stores so we
173 * better flush that too when necessary.
174 */
175 brnz,pt %o1, __flush_icache_page
176 sllx %o0, 11, %o0
177 retl
178 nop
179
180#endif /* DCACHE_ALIASING_POSSIBLE */
181
182 .previous
183
184 /* Cheetah specific versions, patched at boot time. */
185__cheetah_flush_tlb_mm: /* 19 insns */
186 rdpr %pstate, %g7
187 andn %g7, PSTATE_IE, %g2
188 wrpr %g2, 0x0, %pstate
189 wrpr %g0, 1, %tl
190 mov PRIMARY_CONTEXT, %o2
191 mov 0x40, %g3
192 ldxa [%o2] ASI_DMMU, %g2
193 srlx %g2, CTX_PGSZ1_NUC_SHIFT, %o1
194 sllx %o1, CTX_PGSZ1_NUC_SHIFT, %o1
195 or %o0, %o1, %o0 /* Preserve nucleus page size fields */
196 stxa %o0, [%o2] ASI_DMMU
197 stxa %g0, [%g3] ASI_DMMU_DEMAP
198 stxa %g0, [%g3] ASI_IMMU_DEMAP
199 stxa %g2, [%o2] ASI_DMMU
200 sethi %hi(KERNBASE), %o2
201 flush %o2
202 wrpr %g0, 0, %tl
203 retl
204 wrpr %g7, 0x0, %pstate
205
206__cheetah_flush_tlb_pending: /* 27 insns */
207 /* %o0 = context, %o1 = nr, %o2 = vaddrs[] */
208 rdpr %pstate, %g7
209 sllx %o1, 3, %o1
210 andn %g7, PSTATE_IE, %g2
211 wrpr %g2, 0x0, %pstate
212 wrpr %g0, 1, %tl
213 mov PRIMARY_CONTEXT, %o4
214 ldxa [%o4] ASI_DMMU, %g2
215 srlx %g2, CTX_PGSZ1_NUC_SHIFT, %o3
216 sllx %o3, CTX_PGSZ1_NUC_SHIFT, %o3
217 or %o0, %o3, %o0 /* Preserve nucleus page size fields */
218 stxa %o0, [%o4] ASI_DMMU
2191: sub %o1, (1 << 3), %o1
220 ldx [%o2 + %o1], %o3
221 andcc %o3, 1, %g0
222 be,pn %icc, 2f
223 andn %o3, 1, %o3
224 stxa %g0, [%o3] ASI_IMMU_DEMAP
2252: stxa %g0, [%o3] ASI_DMMU_DEMAP
226 membar #Sync
227 brnz,pt %o1, 1b
228 nop
229 stxa %g2, [%o4] ASI_DMMU
230 sethi %hi(KERNBASE), %o4
231 flush %o4
232 wrpr %g0, 0, %tl
233 retl
234 wrpr %g7, 0x0, %pstate
235
236#ifdef DCACHE_ALIASING_POSSIBLE
237__cheetah_flush_dcache_page: /* 11 insns */
238 sethi %uhi(PAGE_OFFSET), %g1
239 sllx %g1, 32, %g1
240 sub %o0, %g1, %o0
241 sethi %hi(PAGE_SIZE), %o4
2421: subcc %o4, (1 << 5), %o4
243 stxa %g0, [%o0 + %o4] ASI_DCACHE_INVALIDATE
244 membar #Sync
245 bne,pt %icc, 1b
246 nop
247 retl /* I-cache flush never needed on Cheetah, see callers. */
248 nop
249#endif /* DCACHE_ALIASING_POSSIBLE */
250
251 /* Hypervisor specific versions, patched at boot time. */
252__hypervisor_tlb_tl0_error:
253 save %sp, -192, %sp
254 mov %i0, %o0
255 call hypervisor_tlbop_error
256 mov %i1, %o1
257 ret
258 restore
259
260__hypervisor_flush_tlb_mm: /* 10 insns */
261 mov %o0, %o2 /* ARG2: mmu context */
262 mov 0, %o0 /* ARG0: CPU lists unimplemented */
263 mov 0, %o1 /* ARG1: CPU lists unimplemented */
264 mov HV_MMU_ALL, %o3 /* ARG3: flags */
265 mov HV_FAST_MMU_DEMAP_CTX, %o5
266 ta HV_FAST_TRAP
267 brnz,pn %o0, __hypervisor_tlb_tl0_error
268 mov HV_FAST_MMU_DEMAP_CTX, %o1
269 retl
270 nop
271
272__hypervisor_flush_tlb_pending: /* 16 insns */
273 /* %o0 = context, %o1 = nr, %o2 = vaddrs[] */
274 sllx %o1, 3, %g1
275 mov %o2, %g2
276 mov %o0, %g3
2771: sub %g1, (1 << 3), %g1
278 ldx [%g2 + %g1], %o0 /* ARG0: vaddr + IMMU-bit */
279 mov %g3, %o1 /* ARG1: mmu context */
280 mov HV_MMU_ALL, %o2 /* ARG2: flags */
281 srlx %o0, PAGE_SHIFT, %o0
282 sllx %o0, PAGE_SHIFT, %o0
283 ta HV_MMU_UNMAP_ADDR_TRAP
284 brnz,pn %o0, __hypervisor_tlb_tl0_error
285 mov HV_MMU_UNMAP_ADDR_TRAP, %o1
286 brnz,pt %g1, 1b
287 nop
288 retl
289 nop
290
291__hypervisor_flush_tlb_kernel_range: /* 16 insns */
292 /* %o0=start, %o1=end */
293 cmp %o0, %o1
294 be,pn %xcc, 2f
295 sethi %hi(PAGE_SIZE), %g3
296 mov %o0, %g1
297 sub %o1, %g1, %g2
298 sub %g2, %g3, %g2
2991: add %g1, %g2, %o0 /* ARG0: virtual address */
300 mov 0, %o1 /* ARG1: mmu context */
301 mov HV_MMU_ALL, %o2 /* ARG2: flags */
302 ta HV_MMU_UNMAP_ADDR_TRAP
303 brnz,pn %o0, __hypervisor_tlb_tl0_error
304 mov HV_MMU_UNMAP_ADDR_TRAP, %o1
305 brnz,pt %g2, 1b
306 sub %g2, %g3, %g2
3072: retl
308 nop
309
310#ifdef DCACHE_ALIASING_POSSIBLE
311 /* XXX Niagara and friends have an 8K cache, so no aliasing is
312 * XXX possible, but nothing explicit in the Hypervisor API
313 * XXX guarantees this.
314 */
315__hypervisor_flush_dcache_page: /* 2 insns */
316 retl
317 nop
318#endif
319
320tlb_patch_one:
3211: lduw [%o1], %g1
322 stw %g1, [%o0]
323 flush %o0
324 subcc %o2, 1, %o2
325 add %o1, 4, %o1
326 bne,pt %icc, 1b
327 add %o0, 4, %o0
328 retl
329 nop
330
331 .globl cheetah_patch_cachetlbops
332cheetah_patch_cachetlbops:
333 save %sp, -128, %sp
334
335 sethi %hi(__flush_tlb_mm), %o0
336 or %o0, %lo(__flush_tlb_mm), %o0
337 sethi %hi(__cheetah_flush_tlb_mm), %o1
338 or %o1, %lo(__cheetah_flush_tlb_mm), %o1
339 call tlb_patch_one
340 mov 19, %o2
341
342 sethi %hi(__flush_tlb_pending), %o0
343 or %o0, %lo(__flush_tlb_pending), %o0
344 sethi %hi(__cheetah_flush_tlb_pending), %o1
345 or %o1, %lo(__cheetah_flush_tlb_pending), %o1
346 call tlb_patch_one
347 mov 27, %o2
348
349#ifdef DCACHE_ALIASING_POSSIBLE
350 sethi %hi(__flush_dcache_page), %o0
351 or %o0, %lo(__flush_dcache_page), %o0
352 sethi %hi(__cheetah_flush_dcache_page), %o1
353 or %o1, %lo(__cheetah_flush_dcache_page), %o1
354 call tlb_patch_one
355 mov 11, %o2
356#endif /* DCACHE_ALIASING_POSSIBLE */
357
358 ret
359 restore
360
361#ifdef CONFIG_SMP
362 /* These are all called by the slaves of a cross call, at
363 * trap level 1, with interrupts fully disabled.
364 *
365 * Register usage:
366 * %g5 mm->context (all tlb flushes)
367 * %g1 address arg 1 (tlb page and range flushes)
368 * %g7 address arg 2 (tlb range flush only)
369 *
370 * %g6 scratch 1
371 * %g2 scratch 2
372 * %g3 scratch 3
373 * %g4 scratch 4
374 */
375 .align 32
376 .globl xcall_flush_tlb_mm
377xcall_flush_tlb_mm: /* 21 insns */
378 mov PRIMARY_CONTEXT, %g2
379 ldxa [%g2] ASI_DMMU, %g3
380 srlx %g3, CTX_PGSZ1_NUC_SHIFT, %g4
381 sllx %g4, CTX_PGSZ1_NUC_SHIFT, %g4
382 or %g5, %g4, %g5 /* Preserve nucleus page size fields */
383 stxa %g5, [%g2] ASI_DMMU
384 mov 0x40, %g4
385 stxa %g0, [%g4] ASI_DMMU_DEMAP
386 stxa %g0, [%g4] ASI_IMMU_DEMAP
387 stxa %g3, [%g2] ASI_DMMU
388 retry
389 nop
390 nop
391 nop
392 nop
393 nop
394 nop
395 nop
396 nop
397 nop
398 nop
399
400 .globl xcall_flush_tlb_pending
401xcall_flush_tlb_pending: /* 21 insns */
402 /* %g5=context, %g1=nr, %g7=vaddrs[] */
403 sllx %g1, 3, %g1
404 mov PRIMARY_CONTEXT, %g4
405 ldxa [%g4] ASI_DMMU, %g2
406 srlx %g2, CTX_PGSZ1_NUC_SHIFT, %g4
407 sllx %g4, CTX_PGSZ1_NUC_SHIFT, %g4
408 or %g5, %g4, %g5
409 mov PRIMARY_CONTEXT, %g4
410 stxa %g5, [%g4] ASI_DMMU
4111: sub %g1, (1 << 3), %g1
412 ldx [%g7 + %g1], %g5
413 andcc %g5, 0x1, %g0
414 be,pn %icc, 2f
415
416 andn %g5, 0x1, %g5
417 stxa %g0, [%g5] ASI_IMMU_DEMAP
4182: stxa %g0, [%g5] ASI_DMMU_DEMAP
419 membar #Sync
420 brnz,pt %g1, 1b
421 nop
422 stxa %g2, [%g4] ASI_DMMU
423 retry
424 nop
425
426 .globl xcall_flush_tlb_kernel_range
427xcall_flush_tlb_kernel_range: /* 25 insns */
428 sethi %hi(PAGE_SIZE - 1), %g2
429 or %g2, %lo(PAGE_SIZE - 1), %g2
430 andn %g1, %g2, %g1
431 andn %g7, %g2, %g7
432 sub %g7, %g1, %g3
433 add %g2, 1, %g2
434 sub %g3, %g2, %g3
435 or %g1, 0x20, %g1 ! Nucleus
4361: stxa %g0, [%g1 + %g3] ASI_DMMU_DEMAP
437 stxa %g0, [%g1 + %g3] ASI_IMMU_DEMAP
438 membar #Sync
439 brnz,pt %g3, 1b
440 sub %g3, %g2, %g3
441 retry
442 nop
443 nop
444 nop
445 nop
446 nop
447 nop
448 nop
449 nop
450 nop
451 nop
452 nop
453
454 /* This runs in a very controlled environment, so we do
455 * not need to worry about BH races etc.
456 */
457 .globl xcall_sync_tick
458xcall_sync_tick:
459
460661: rdpr %pstate, %g2
461 wrpr %g2, PSTATE_IG | PSTATE_AG, %pstate
462 .section .sun4v_2insn_patch, "ax"
463 .word 661b
464 nop
465 nop
466 .previous
467
468 rdpr %pil, %g2
469 wrpr %g0, 15, %pil
470 sethi %hi(109f), %g7
471 b,pt %xcc, etrap_irq
472109: or %g7, %lo(109b), %g7
473#ifdef CONFIG_TRACE_IRQFLAGS
474 call trace_hardirqs_off
475 nop
476#endif
477 call smp_synchronize_tick_client
478 nop
479 b rtrap_xcall
480 ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %l1
481
482 .globl xcall_fetch_glob_regs
483xcall_fetch_glob_regs:
484 sethi %hi(global_reg_snapshot), %g1
485 or %g1, %lo(global_reg_snapshot), %g1
486 __GET_CPUID(%g2)
487 sllx %g2, 6, %g3
488 add %g1, %g3, %g1
489 rdpr %tstate, %g7
490 stx %g7, [%g1 + GR_SNAP_TSTATE]
491 rdpr %tpc, %g7
492 stx %g7, [%g1 + GR_SNAP_TPC]
493 rdpr %tnpc, %g7
494 stx %g7, [%g1 + GR_SNAP_TNPC]
495 stx %o7, [%g1 + GR_SNAP_O7]
496 stx %i7, [%g1 + GR_SNAP_I7]
497 /* Don't try this at home kids... */
498 rdpr %cwp, %g2
499 sub %g2, 1, %g7
500 wrpr %g7, %cwp
501 mov %i7, %g7
502 wrpr %g2, %cwp
503 stx %g7, [%g1 + GR_SNAP_RPC]
504 sethi %hi(trap_block), %g7
505 or %g7, %lo(trap_block), %g7
506 sllx %g2, TRAP_BLOCK_SZ_SHIFT, %g2
507 add %g7, %g2, %g7
508 ldx [%g7 + TRAP_PER_CPU_THREAD], %g3
509 stx %g3, [%g1 + GR_SNAP_THREAD]
510 retry
511
512#ifdef DCACHE_ALIASING_POSSIBLE
513 .align 32
514 .globl xcall_flush_dcache_page_cheetah
515xcall_flush_dcache_page_cheetah: /* %g1 == physical page address */
516 sethi %hi(PAGE_SIZE), %g3
5171: subcc %g3, (1 << 5), %g3
518 stxa %g0, [%g1 + %g3] ASI_DCACHE_INVALIDATE
519 membar #Sync
520 bne,pt %icc, 1b
521 nop
522 retry
523 nop
524#endif /* DCACHE_ALIASING_POSSIBLE */
525
526 .globl xcall_flush_dcache_page_spitfire
527xcall_flush_dcache_page_spitfire: /* %g1 == physical page address
528 %g7 == kernel page virtual address
529 %g5 == (page->mapping != NULL) */
530#ifdef DCACHE_ALIASING_POSSIBLE
531 srlx %g1, (13 - 2), %g1 ! Form tag comparitor
532 sethi %hi(L1DCACHE_SIZE), %g3 ! D$ size == 16K
533 sub %g3, (1 << 5), %g3 ! D$ linesize == 32
5341: ldxa [%g3] ASI_DCACHE_TAG, %g2
535 andcc %g2, 0x3, %g0
536 be,pn %xcc, 2f
537 andn %g2, 0x3, %g2
538 cmp %g2, %g1
539
540 bne,pt %xcc, 2f
541 nop
542 stxa %g0, [%g3] ASI_DCACHE_TAG
543 membar #Sync
5442: cmp %g3, 0
545 bne,pt %xcc, 1b
546 sub %g3, (1 << 5), %g3
547
548 brz,pn %g5, 2f
549#endif /* DCACHE_ALIASING_POSSIBLE */
550 sethi %hi(PAGE_SIZE), %g3
551
5521: flush %g7
553 subcc %g3, (1 << 5), %g3
554 bne,pt %icc, 1b
555 add %g7, (1 << 5), %g7
556
5572: retry
558 nop
559 nop
560
561 /* %g5: error
562 * %g6: tlb op
563 */
564__hypervisor_tlb_xcall_error:
565 mov %g5, %g4
566 mov %g6, %g5
567 ba,pt %xcc, etrap
568 rd %pc, %g7
569 mov %l4, %o0
570 call hypervisor_tlbop_error_xcall
571 mov %l5, %o1
572 ba,a,pt %xcc, rtrap
573
574 .globl __hypervisor_xcall_flush_tlb_mm
575__hypervisor_xcall_flush_tlb_mm: /* 21 insns */
576 /* %g5=ctx, g1,g2,g3,g4,g7=scratch, %g6=unusable */
577 mov %o0, %g2
578 mov %o1, %g3
579 mov %o2, %g4
580 mov %o3, %g1
581 mov %o5, %g7
582 clr %o0 /* ARG0: CPU lists unimplemented */
583 clr %o1 /* ARG1: CPU lists unimplemented */
584 mov %g5, %o2 /* ARG2: mmu context */
585 mov HV_MMU_ALL, %o3 /* ARG3: flags */
586 mov HV_FAST_MMU_DEMAP_CTX, %o5
587 ta HV_FAST_TRAP
588 mov HV_FAST_MMU_DEMAP_CTX, %g6
589 brnz,pn %o0, __hypervisor_tlb_xcall_error
590 mov %o0, %g5
591 mov %g2, %o0
592 mov %g3, %o1
593 mov %g4, %o2
594 mov %g1, %o3
595 mov %g7, %o5
596 membar #Sync
597 retry
598
599 .globl __hypervisor_xcall_flush_tlb_pending
600__hypervisor_xcall_flush_tlb_pending: /* 21 insns */
601 /* %g5=ctx, %g1=nr, %g7=vaddrs[], %g2,%g3,%g4,g6=scratch */
602 sllx %g1, 3, %g1
603 mov %o0, %g2
604 mov %o1, %g3
605 mov %o2, %g4
6061: sub %g1, (1 << 3), %g1
607 ldx [%g7 + %g1], %o0 /* ARG0: virtual address */
608 mov %g5, %o1 /* ARG1: mmu context */
609 mov HV_MMU_ALL, %o2 /* ARG2: flags */
610 srlx %o0, PAGE_SHIFT, %o0
611 sllx %o0, PAGE_SHIFT, %o0
612 ta HV_MMU_UNMAP_ADDR_TRAP
613 mov HV_MMU_UNMAP_ADDR_TRAP, %g6
614 brnz,a,pn %o0, __hypervisor_tlb_xcall_error
615 mov %o0, %g5
616 brnz,pt %g1, 1b
617 nop
618 mov %g2, %o0
619 mov %g3, %o1
620 mov %g4, %o2
621 membar #Sync
622 retry
623
624 .globl __hypervisor_xcall_flush_tlb_kernel_range
625__hypervisor_xcall_flush_tlb_kernel_range: /* 25 insns */
626 /* %g1=start, %g7=end, g2,g3,g4,g5,g6=scratch */
627 sethi %hi(PAGE_SIZE - 1), %g2
628 or %g2, %lo(PAGE_SIZE - 1), %g2
629 andn %g1, %g2, %g1
630 andn %g7, %g2, %g7
631 sub %g7, %g1, %g3
632 add %g2, 1, %g2
633 sub %g3, %g2, %g3
634 mov %o0, %g2
635 mov %o1, %g4
636 mov %o2, %g7
6371: add %g1, %g3, %o0 /* ARG0: virtual address */
638 mov 0, %o1 /* ARG1: mmu context */
639 mov HV_MMU_ALL, %o2 /* ARG2: flags */
640 ta HV_MMU_UNMAP_ADDR_TRAP
641 mov HV_MMU_UNMAP_ADDR_TRAP, %g6
642 brnz,pn %o0, __hypervisor_tlb_xcall_error
643 mov %o0, %g5
644 sethi %hi(PAGE_SIZE), %o2
645 brnz,pt %g3, 1b
646 sub %g3, %o2, %g3
647 mov %g2, %o0
648 mov %g4, %o1
649 mov %g7, %o2
650 membar #Sync
651 retry
652
653 /* These just get rescheduled to PIL vectors. */
654 .globl xcall_call_function
655xcall_call_function:
656 wr %g0, (1 << PIL_SMP_CALL_FUNC), %set_softint
657 retry
658
659 .globl xcall_call_function_single
660xcall_call_function_single:
661 wr %g0, (1 << PIL_SMP_CALL_FUNC_SNGL), %set_softint
662 retry
663
664 .globl xcall_receive_signal
665xcall_receive_signal:
666 wr %g0, (1 << PIL_SMP_RECEIVE_SIGNAL), %set_softint
667 retry
668
669 .globl xcall_capture
670xcall_capture:
671 wr %g0, (1 << PIL_SMP_CAPTURE), %set_softint
672 retry
673
674 .globl xcall_new_mmu_context_version
675xcall_new_mmu_context_version:
676 wr %g0, (1 << PIL_SMP_CTX_NEW_VERSION), %set_softint
677 retry
678
679#ifdef CONFIG_KGDB
680 .globl xcall_kgdb_capture
681xcall_kgdb_capture:
682661: rdpr %pstate, %g2
683 wrpr %g2, PSTATE_IG | PSTATE_AG, %pstate
684 .section .sun4v_2insn_patch, "ax"
685 .word 661b
686 nop
687 nop
688 .previous
689
690 rdpr %pil, %g2
691 wrpr %g0, 15, %pil
692 sethi %hi(109f), %g7
693 ba,pt %xcc, etrap_irq
694109: or %g7, %lo(109b), %g7
695#ifdef CONFIG_TRACE_IRQFLAGS
696 call trace_hardirqs_off
697 nop
698#endif
699 call smp_kgdb_capture_client
700 add %sp, PTREGS_OFF, %o0
701 /* Has to be a non-v9 branch due to the large distance. */
702 ba rtrap_xcall
703 ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %l1
704#endif
705
706#endif /* CONFIG_SMP */
707
708
709 .globl hypervisor_patch_cachetlbops
710hypervisor_patch_cachetlbops:
711 save %sp, -128, %sp
712
713 sethi %hi(__flush_tlb_mm), %o0
714 or %o0, %lo(__flush_tlb_mm), %o0
715 sethi %hi(__hypervisor_flush_tlb_mm), %o1
716 or %o1, %lo(__hypervisor_flush_tlb_mm), %o1
717 call tlb_patch_one
718 mov 10, %o2
719
720 sethi %hi(__flush_tlb_pending), %o0
721 or %o0, %lo(__flush_tlb_pending), %o0
722 sethi %hi(__hypervisor_flush_tlb_pending), %o1
723 or %o1, %lo(__hypervisor_flush_tlb_pending), %o1
724 call tlb_patch_one
725 mov 16, %o2
726
727 sethi %hi(__flush_tlb_kernel_range), %o0
728 or %o0, %lo(__flush_tlb_kernel_range), %o0
729 sethi %hi(__hypervisor_flush_tlb_kernel_range), %o1
730 or %o1, %lo(__hypervisor_flush_tlb_kernel_range), %o1
731 call tlb_patch_one
732 mov 16, %o2
733
734#ifdef DCACHE_ALIASING_POSSIBLE
735 sethi %hi(__flush_dcache_page), %o0
736 or %o0, %lo(__flush_dcache_page), %o0
737 sethi %hi(__hypervisor_flush_dcache_page), %o1
738 or %o1, %lo(__hypervisor_flush_dcache_page), %o1
739 call tlb_patch_one
740 mov 2, %o2
741#endif /* DCACHE_ALIASING_POSSIBLE */
742
743#ifdef CONFIG_SMP
744 sethi %hi(xcall_flush_tlb_mm), %o0
745 or %o0, %lo(xcall_flush_tlb_mm), %o0
746 sethi %hi(__hypervisor_xcall_flush_tlb_mm), %o1
747 or %o1, %lo(__hypervisor_xcall_flush_tlb_mm), %o1
748 call tlb_patch_one
749 mov 21, %o2
750
751 sethi %hi(xcall_flush_tlb_pending), %o0
752 or %o0, %lo(xcall_flush_tlb_pending), %o0
753 sethi %hi(__hypervisor_xcall_flush_tlb_pending), %o1
754 or %o1, %lo(__hypervisor_xcall_flush_tlb_pending), %o1
755 call tlb_patch_one
756 mov 21, %o2
757
758 sethi %hi(xcall_flush_tlb_kernel_range), %o0
759 or %o0, %lo(xcall_flush_tlb_kernel_range), %o0
760 sethi %hi(__hypervisor_xcall_flush_tlb_kernel_range), %o1
761 or %o1, %lo(__hypervisor_xcall_flush_tlb_kernel_range), %o1
762 call tlb_patch_one
763 mov 25, %o2
764#endif /* CONFIG_SMP */
765
766 ret
767 restore
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-10 11:31:11 -0500