aboutsummaryrefslogtreecommitdiffstats
path: root/arch/ppc64/kernel/pSeries_lpar.c
diff options
context:
space:
mode:
authorPaul Mackerras <paulus@samba.org>2005-10-10 08:03:41 -0400
committerPaul Mackerras <paulus@samba.org>2005-10-10 08:03:41 -0400
commit69a80d3f69d0b2d7fae5a73c6e034d402d434d8a (patch)
treedd66f34510eae791a04c8dd77ce77a223b2f46d6 /arch/ppc64/kernel/pSeries_lpar.c
parentab1f9dac6eea25ee59e4c8e1cf0b7476afbbfe07 (diff)
powerpc: move pSeries files to arch/powerpc/platforms/pseries
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/ppc64/kernel/pSeries_lpar.c')
-rw-r--r--arch/ppc64/kernel/pSeries_lpar.c517
1 files changed, 0 insertions, 517 deletions
diff --git a/arch/ppc64/kernel/pSeries_lpar.c b/arch/ppc64/kernel/pSeries_lpar.c
deleted file mode 100644
index 268d8362dde7..000000000000
--- a/arch/ppc64/kernel/pSeries_lpar.c
+++ /dev/null
@@ -1,517 +0,0 @@
1/*
2 * pSeries_lpar.c
3 * Copyright (C) 2001 Todd Inglett, IBM Corporation
4 *
5 * pSeries LPAR support.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22#define DEBUG
23
24#include <linux/config.h>
25#include <linux/kernel.h>
26#include <linux/dma-mapping.h>
27#include <asm/processor.h>
28#include <asm/mmu.h>
29#include <asm/page.h>
30#include <asm/pgtable.h>
31#include <asm/machdep.h>
32#include <asm/abs_addr.h>
33#include <asm/mmu_context.h>
34#include <asm/ppcdebug.h>
35#include <asm/iommu.h>
36#include <asm/tlbflush.h>
37#include <asm/tlb.h>
38#include <asm/prom.h>
39#include <asm/abs_addr.h>
40#include <asm/cputable.h>
41#include <asm/plpar_wrappers.h>
42
43#ifdef DEBUG
44#define DBG(fmt...) udbg_printf(fmt)
45#else
46#define DBG(fmt...)
47#endif
48
49/* in pSeries_hvCall.S */
50EXPORT_SYMBOL(plpar_hcall);
51EXPORT_SYMBOL(plpar_hcall_4out);
52EXPORT_SYMBOL(plpar_hcall_norets);
53EXPORT_SYMBOL(plpar_hcall_8arg_2ret);
54
55extern void pSeries_find_serial_port(void);
56
57
58int vtermno; /* virtual terminal# for udbg */
59
60#define __ALIGNED__ __attribute__((__aligned__(sizeof(long))))
61static void udbg_hvsi_putc(unsigned char c)
62{
63 /* packet's seqno isn't used anyways */
64 uint8_t packet[] __ALIGNED__ = { 0xff, 5, 0, 0, c };
65 int rc;
66
67 if (c == '\n')
68 udbg_hvsi_putc('\r');
69
70 do {
71 rc = plpar_put_term_char(vtermno, sizeof(packet), packet);
72 } while (rc == H_Busy);
73}
74
75static long hvsi_udbg_buf_len;
76static uint8_t hvsi_udbg_buf[256];
77
78static int udbg_hvsi_getc_poll(void)
79{
80 unsigned char ch;
81 int rc, i;
82
83 if (hvsi_udbg_buf_len == 0) {
84 rc = plpar_get_term_char(vtermno, &hvsi_udbg_buf_len, hvsi_udbg_buf);
85 if (rc != H_Success || hvsi_udbg_buf[0] != 0xff) {
86 /* bad read or non-data packet */
87 hvsi_udbg_buf_len = 0;
88 } else {
89 /* remove the packet header */
90 for (i = 4; i < hvsi_udbg_buf_len; i++)
91 hvsi_udbg_buf[i-4] = hvsi_udbg_buf[i];
92 hvsi_udbg_buf_len -= 4;
93 }
94 }
95
96 if (hvsi_udbg_buf_len <= 0 || hvsi_udbg_buf_len > 256) {
97 /* no data ready */
98 hvsi_udbg_buf_len = 0;
99 return -1;
100 }
101
102 ch = hvsi_udbg_buf[0];
103 /* shift remaining data down */
104 for (i = 1; i < hvsi_udbg_buf_len; i++) {
105 hvsi_udbg_buf[i-1] = hvsi_udbg_buf[i];
106 }
107 hvsi_udbg_buf_len--;
108
109 return ch;
110}
111
112static unsigned char udbg_hvsi_getc(void)
113{
114 int ch;
115 for (;;) {
116 ch = udbg_hvsi_getc_poll();
117 if (ch == -1) {
118 /* This shouldn't be needed...but... */
119 volatile unsigned long delay;
120 for (delay=0; delay < 2000000; delay++)
121 ;
122 } else {
123 return ch;
124 }
125 }
126}
127
128static void udbg_putcLP(unsigned char c)
129{
130 char buf[16];
131 unsigned long rc;
132
133 if (c == '\n')
134 udbg_putcLP('\r');
135
136 buf[0] = c;
137 do {
138 rc = plpar_put_term_char(vtermno, 1, buf);
139 } while(rc == H_Busy);
140}
141
142/* Buffered chars getc */
143static long inbuflen;
144static long inbuf[2]; /* must be 2 longs */
145
146static int udbg_getc_pollLP(void)
147{
148 /* The interface is tricky because it may return up to 16 chars.
149 * We save them statically for future calls to udbg_getc().
150 */
151 char ch, *buf = (char *)inbuf;
152 int i;
153 long rc;
154 if (inbuflen == 0) {
155 /* get some more chars. */
156 inbuflen = 0;
157 rc = plpar_get_term_char(vtermno, &inbuflen, buf);
158 if (rc != H_Success)
159 inbuflen = 0; /* otherwise inbuflen is garbage */
160 }
161 if (inbuflen <= 0 || inbuflen > 16) {
162 /* Catch error case as well as other oddities (corruption) */
163 inbuflen = 0;
164 return -1;
165 }
166 ch = buf[0];
167 for (i = 1; i < inbuflen; i++) /* shuffle them down. */
168 buf[i-1] = buf[i];
169 inbuflen--;
170 return ch;
171}
172
173static unsigned char udbg_getcLP(void)
174{
175 int ch;
176 for (;;) {
177 ch = udbg_getc_pollLP();
178 if (ch == -1) {
179 /* This shouldn't be needed...but... */
180 volatile unsigned long delay;
181 for (delay=0; delay < 2000000; delay++)
182 ;
183 } else {
184 return ch;
185 }
186 }
187}
188
189/* call this from early_init() for a working debug console on
190 * vterm capable LPAR machines
191 */
192void udbg_init_debug_lpar(void)
193{
194 vtermno = 0;
195 udbg_putc = udbg_putcLP;
196 udbg_getc = udbg_getcLP;
197 udbg_getc_poll = udbg_getc_pollLP;
198}
199
200/* returns 0 if couldn't find or use /chosen/stdout as console */
201int find_udbg_vterm(void)
202{
203 struct device_node *stdout_node;
204 u32 *termno;
205 char *name;
206 int found = 0;
207
208 /* find the boot console from /chosen/stdout */
209 if (!of_chosen)
210 return 0;
211 name = (char *)get_property(of_chosen, "linux,stdout-path", NULL);
212 if (name == NULL)
213 return 0;
214 stdout_node = of_find_node_by_path(name);
215 if (!stdout_node)
216 return 0;
217
218 /* now we have the stdout node; figure out what type of device it is. */
219 name = (char *)get_property(stdout_node, "name", NULL);
220 if (!name) {
221 printk(KERN_WARNING "stdout node missing 'name' property!\n");
222 goto out;
223 }
224
225 if (strncmp(name, "vty", 3) == 0) {
226 if (device_is_compatible(stdout_node, "hvterm1")) {
227 termno = (u32 *)get_property(stdout_node, "reg", NULL);
228 if (termno) {
229 vtermno = termno[0];
230 udbg_putc = udbg_putcLP;
231 udbg_getc = udbg_getcLP;
232 udbg_getc_poll = udbg_getc_pollLP;
233 found = 1;
234 }
235 } else if (device_is_compatible(stdout_node, "hvterm-protocol")) {
236 termno = (u32 *)get_property(stdout_node, "reg", NULL);
237 if (termno) {
238 vtermno = termno[0];
239 udbg_putc = udbg_hvsi_putc;
240 udbg_getc = udbg_hvsi_getc;
241 udbg_getc_poll = udbg_hvsi_getc_poll;
242 found = 1;
243 }
244 }
245 } else if (strncmp(name, "serial", 6)) {
246 /* XXX fix ISA serial console */
247 printk(KERN_WARNING "serial stdout on LPAR ('%s')! "
248 "can't print udbg messages\n",
249 stdout_node->full_name);
250 } else {
251 printk(KERN_WARNING "don't know how to print to stdout '%s'\n",
252 stdout_node->full_name);
253 }
254
255out:
256 of_node_put(stdout_node);
257 return found;
258}
259
260void vpa_init(int cpu)
261{
262 int hwcpu = get_hard_smp_processor_id(cpu);
263 unsigned long vpa = (unsigned long)&(paca[cpu].lppaca);
264 long ret;
265 unsigned long flags;
266
267 /* Register the Virtual Processor Area (VPA) */
268 flags = 1UL << (63 - 18);
269
270 if (cpu_has_feature(CPU_FTR_ALTIVEC))
271 paca[cpu].lppaca.vmxregs_in_use = 1;
272
273 ret = register_vpa(flags, hwcpu, __pa(vpa));
274
275 if (ret)
276 printk(KERN_ERR "WARNING: vpa_init: VPA registration for "
277 "cpu %d (hw %d) of area %lx returns %ld\n",
278 cpu, hwcpu, __pa(vpa), ret);
279}
280
281long pSeries_lpar_hpte_insert(unsigned long hpte_group,
282 unsigned long va, unsigned long prpn,
283 unsigned long vflags, unsigned long rflags)
284{
285 unsigned long lpar_rc;
286 unsigned long flags;
287 unsigned long slot;
288 unsigned long hpte_v, hpte_r;
289 unsigned long dummy0, dummy1;
290
291 hpte_v = ((va >> 23) << HPTE_V_AVPN_SHIFT) | vflags | HPTE_V_VALID;
292 if (vflags & HPTE_V_LARGE)
293 hpte_v &= ~(1UL << HPTE_V_AVPN_SHIFT);
294
295 hpte_r = (prpn << HPTE_R_RPN_SHIFT) | rflags;
296
297 /* Now fill in the actual HPTE */
298 /* Set CEC cookie to 0 */
299 /* Zero page = 0 */
300 /* I-cache Invalidate = 0 */
301 /* I-cache synchronize = 0 */
302 /* Exact = 0 */
303 flags = 0;
304
305 /* XXX why is this here? - Anton */
306 if (rflags & (_PAGE_GUARDED|_PAGE_NO_CACHE))
307 hpte_r &= ~_PAGE_COHERENT;
308
309 lpar_rc = plpar_hcall(H_ENTER, flags, hpte_group, hpte_v,
310 hpte_r, &slot, &dummy0, &dummy1);
311
312 if (unlikely(lpar_rc == H_PTEG_Full))
313 return -1;
314
315 /*
316 * Since we try and ioremap PHBs we don't own, the pte insert
317 * will fail. However we must catch the failure in hash_page
318 * or we will loop forever, so return -2 in this case.
319 */
320 if (unlikely(lpar_rc != H_Success))
321 return -2;
322
323 /* Because of iSeries, we have to pass down the secondary
324 * bucket bit here as well
325 */
326 return (slot & 7) | (!!(vflags & HPTE_V_SECONDARY) << 3);
327}
328
329static DEFINE_SPINLOCK(pSeries_lpar_tlbie_lock);
330
331static long pSeries_lpar_hpte_remove(unsigned long hpte_group)
332{
333 unsigned long slot_offset;
334 unsigned long lpar_rc;
335 int i;
336 unsigned long dummy1, dummy2;
337
338 /* pick a random slot to start at */
339 slot_offset = mftb() & 0x7;
340
341 for (i = 0; i < HPTES_PER_GROUP; i++) {
342
343 /* don't remove a bolted entry */
344 lpar_rc = plpar_pte_remove(H_ANDCOND, hpte_group + slot_offset,
345 (0x1UL << 4), &dummy1, &dummy2);
346
347 if (lpar_rc == H_Success)
348 return i;
349
350 BUG_ON(lpar_rc != H_Not_Found);
351
352 slot_offset++;
353 slot_offset &= 0x7;
354 }
355
356 return -1;
357}
358
359static void pSeries_lpar_hptab_clear(void)
360{
361 unsigned long size_bytes = 1UL << ppc64_pft_size;
362 unsigned long hpte_count = size_bytes >> 4;
363 unsigned long dummy1, dummy2;
364 int i;
365
366 /* TODO: Use bulk call */
367 for (i = 0; i < hpte_count; i++)
368 plpar_pte_remove(0, i, 0, &dummy1, &dummy2);
369}
370
371/*
372 * NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and
373 * the low 3 bits of flags happen to line up. So no transform is needed.
374 * We can probably optimize here and assume the high bits of newpp are
375 * already zero. For now I am paranoid.
376 */
377static long pSeries_lpar_hpte_updatepp(unsigned long slot, unsigned long newpp,
378 unsigned long va, int large, int local)
379{
380 unsigned long lpar_rc;
381 unsigned long flags = (newpp & 7) | H_AVPN;
382 unsigned long avpn = va >> 23;
383
384 if (large)
385 avpn &= ~0x1UL;
386
387 lpar_rc = plpar_pte_protect(flags, slot, (avpn << 7));
388
389 if (lpar_rc == H_Not_Found)
390 return -1;
391
392 BUG_ON(lpar_rc != H_Success);
393
394 return 0;
395}
396
397static unsigned long pSeries_lpar_hpte_getword0(unsigned long slot)
398{
399 unsigned long dword0;
400 unsigned long lpar_rc;
401 unsigned long dummy_word1;
402 unsigned long flags;
403
404 /* Read 1 pte at a time */
405 /* Do not need RPN to logical page translation */
406 /* No cross CEC PFT access */
407 flags = 0;
408
409 lpar_rc = plpar_pte_read(flags, slot, &dword0, &dummy_word1);
410
411 BUG_ON(lpar_rc != H_Success);
412
413 return dword0;
414}
415
416static long pSeries_lpar_hpte_find(unsigned long vpn)
417{
418 unsigned long hash;
419 unsigned long i, j;
420 long slot;
421 unsigned long hpte_v;
422
423 hash = hpt_hash(vpn, 0);
424
425 for (j = 0; j < 2; j++) {
426 slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
427 for (i = 0; i < HPTES_PER_GROUP; i++) {
428 hpte_v = pSeries_lpar_hpte_getword0(slot);
429
430 if ((HPTE_V_AVPN_VAL(hpte_v) == (vpn >> 11))
431 && (hpte_v & HPTE_V_VALID)
432 && (!!(hpte_v & HPTE_V_SECONDARY) == j)) {
433 /* HPTE matches */
434 if (j)
435 slot = -slot;
436 return slot;
437 }
438 ++slot;
439 }
440 hash = ~hash;
441 }
442
443 return -1;
444}
445
446static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp,
447 unsigned long ea)
448{
449 unsigned long lpar_rc;
450 unsigned long vsid, va, vpn, flags;
451 long slot;
452
453 vsid = get_kernel_vsid(ea);
454 va = (vsid << 28) | (ea & 0x0fffffff);
455 vpn = va >> PAGE_SHIFT;
456
457 slot = pSeries_lpar_hpte_find(vpn);
458 BUG_ON(slot == -1);
459
460 flags = newpp & 7;
461 lpar_rc = plpar_pte_protect(flags, slot, 0);
462
463 BUG_ON(lpar_rc != H_Success);
464}
465
466static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long va,
467 int large, int local)
468{
469 unsigned long avpn = va >> 23;
470 unsigned long lpar_rc;
471 unsigned long dummy1, dummy2;
472
473 if (large)
474 avpn &= ~0x1UL;
475
476 lpar_rc = plpar_pte_remove(H_AVPN, slot, (avpn << 7), &dummy1,
477 &dummy2);
478
479 if (lpar_rc == H_Not_Found)
480 return;
481
482 BUG_ON(lpar_rc != H_Success);
483}
484
485/*
486 * Take a spinlock around flushes to avoid bouncing the hypervisor tlbie
487 * lock.
488 */
489void pSeries_lpar_flush_hash_range(unsigned long number, int local)
490{
491 int i;
492 unsigned long flags = 0;
493 struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch);
494 int lock_tlbie = !cpu_has_feature(CPU_FTR_LOCKLESS_TLBIE);
495
496 if (lock_tlbie)
497 spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags);
498
499 for (i = 0; i < number; i++)
500 flush_hash_page(batch->vaddr[i], batch->pte[i], local);
501
502 if (lock_tlbie)
503 spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags);
504}
505
506void hpte_init_lpar(void)
507{
508 ppc_md.hpte_invalidate = pSeries_lpar_hpte_invalidate;
509 ppc_md.hpte_updatepp = pSeries_lpar_hpte_updatepp;
510 ppc_md.hpte_updateboltedpp = pSeries_lpar_hpte_updateboltedpp;
511 ppc_md.hpte_insert = pSeries_lpar_hpte_insert;
512 ppc_md.hpte_remove = pSeries_lpar_hpte_remove;
513 ppc_md.flush_hash_range = pSeries_lpar_flush_hash_range;
514 ppc_md.hpte_clear_all = pSeries_lpar_hptab_clear;
515
516 htab_finish_init();
517}
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-24 02:37:59 -0500