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authorTrond Myklebust <Trond.Myklebust@netapp.com>2006-03-23 23:44:19 -0500
committerTrond Myklebust <Trond.Myklebust@netapp.com>2006-03-23 23:44:19 -0500
commit1ebbe2b20091d306453a5cf480a87e6cd28ae76f (patch)
treef5cd7a0fa69b8b1938cb5a0faed2e7b0628072a5 /arch/mips/mm/tlb-andes.c
parentac58c9059da8886b5e8cde012a80266b18ca146e (diff)
parent674a396c6d2ba0341ebdd7c1c9950f32f018e2dd (diff)
Merge branch 'linus'
Diffstat (limited to 'arch/mips/mm/tlb-andes.c')
-rw-r--r--arch/mips/mm/tlb-andes.c259
1 files changed, 0 insertions, 259 deletions
diff --git a/arch/mips/mm/tlb-andes.c b/arch/mips/mm/tlb-andes.c
deleted file mode 100644
index 3f422a849c41..000000000000
--- a/arch/mips/mm/tlb-andes.c
+++ /dev/null
@@ -1,259 +0,0 @@
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1997, 1998, 1999 Ralf Baechle (ralf@gnu.org)
7 * Copyright (C) 1999 Silicon Graphics, Inc.
8 * Copyright (C) 2000 Kanoj Sarcar (kanoj@sgi.com)
9 */
10#include <linux/init.h>
11#include <linux/kernel.h>
12#include <linux/sched.h>
13#include <linux/mm.h>
14#include <asm/page.h>
15#include <asm/pgtable.h>
16#include <asm/system.h>
17#include <asm/mmu_context.h>
18
19extern void build_tlb_refill_handler(void);
20
21#define NTLB_ENTRIES 64
22#define NTLB_ENTRIES_HALF 32
23
24void local_flush_tlb_all(void)
25{
26 unsigned long flags;
27 unsigned long old_ctx;
28 unsigned long entry;
29
30 local_irq_save(flags);
31 /* Save old context and create impossible VPN2 value */
32 old_ctx = read_c0_entryhi() & ASID_MASK;
33 write_c0_entryhi(CKSEG0);
34 write_c0_entrylo0(0);
35 write_c0_entrylo1(0);
36
37 entry = read_c0_wired();
38
39 /* Blast 'em all away. */
40 while (entry < NTLB_ENTRIES) {
41 write_c0_index(entry);
42 tlb_write_indexed();
43 entry++;
44 }
45 write_c0_entryhi(old_ctx);
46 local_irq_restore(flags);
47}
48
49void local_flush_tlb_mm(struct mm_struct *mm)
50{
51 int cpu = smp_processor_id();
52 if (cpu_context(cpu, mm) != 0) {
53 drop_mmu_context(mm,cpu);
54 }
55}
56
57void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
58 unsigned long end)
59{
60 struct mm_struct *mm = vma->vm_mm;
61 int cpu = smp_processor_id();
62
63 if (cpu_context(cpu, mm) != 0) {
64 unsigned long flags;
65 int size;
66
67 local_irq_save(flags);
68 size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
69 size = (size + 1) >> 1;
70 if (size <= NTLB_ENTRIES_HALF) {
71 int oldpid = (read_c0_entryhi() & ASID_MASK);
72 int newpid = (cpu_context(smp_processor_id(), mm)
73 & ASID_MASK);
74
75 start &= (PAGE_MASK << 1);
76 end += ((PAGE_SIZE << 1) - 1);
77 end &= (PAGE_MASK << 1);
78 while(start < end) {
79 int idx;
80
81 write_c0_entryhi(start | newpid);
82 start += (PAGE_SIZE << 1);
83 tlb_probe();
84 idx = read_c0_index();
85 write_c0_entrylo0(0);
86 write_c0_entrylo1(0);
87 write_c0_entryhi(CKSEG0);
88 if(idx < 0)
89 continue;
90 tlb_write_indexed();
91 }
92 write_c0_entryhi(oldpid);
93 } else {
94 drop_mmu_context(mm, cpu);
95 }
96 local_irq_restore(flags);
97 }
98}
99
100void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
101{
102 unsigned long flags;
103 int size;
104
105 size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
106 size = (size + 1) >> 1;
107
108 local_irq_save(flags);
109 if (size <= NTLB_ENTRIES_HALF) {
110 int pid = read_c0_entryhi();
111
112 start &= (PAGE_MASK << 1);
113 end += ((PAGE_SIZE << 1) - 1);
114 end &= (PAGE_MASK << 1);
115
116 while (start < end) {
117 int idx;
118
119 write_c0_entryhi(start);
120 start += (PAGE_SIZE << 1);
121 tlb_probe();
122 idx = read_c0_index();
123 write_c0_entrylo0(0);
124 write_c0_entrylo1(0);
125 write_c0_entryhi(CKSEG0 + (idx << (PAGE_SHIFT+1)));
126 if (idx < 0)
127 continue;
128 tlb_write_indexed();
129 }
130 write_c0_entryhi(pid);
131 } else {
132 local_flush_tlb_all();
133 }
134 local_irq_restore(flags);
135}
136
137void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
138{
139 if (cpu_context(smp_processor_id(), vma->vm_mm) != 0) {
140 unsigned long flags;
141 int oldpid, newpid, idx;
142
143 newpid = (cpu_context(smp_processor_id(), vma->vm_mm) &
144 ASID_MASK);
145 page &= (PAGE_MASK << 1);
146 local_irq_save(flags);
147 oldpid = (read_c0_entryhi() & ASID_MASK);
148 write_c0_entryhi(page | newpid);
149 tlb_probe();
150 idx = read_c0_index();
151 write_c0_entrylo0(0);
152 write_c0_entrylo1(0);
153 write_c0_entryhi(CKSEG0);
154 if (idx < 0)
155 goto finish;
156 tlb_write_indexed();
157
158 finish:
159 write_c0_entryhi(oldpid);
160 local_irq_restore(flags);
161 }
162}
163
164/*
165 * This one is only used for pages with the global bit set so we don't care
166 * much about the ASID.
167 */
168void local_flush_tlb_one(unsigned long page)
169{
170 unsigned long flags;
171 int oldpid, idx;
172
173 local_irq_save(flags);
174 page &= (PAGE_MASK << 1);
175 oldpid = read_c0_entryhi() & 0xff;
176 write_c0_entryhi(page);
177 tlb_probe();
178 idx = read_c0_index();
179 write_c0_entrylo0(0);
180 write_c0_entrylo1(0);
181 if (idx >= 0) {
182 /* Make sure all entries differ. */
183 write_c0_entryhi(CKSEG0+(idx<<(PAGE_SHIFT+1)));
184 tlb_write_indexed();
185 }
186 write_c0_entryhi(oldpid);
187
188 local_irq_restore(flags);
189}
190
191/* XXX Simplify this. On the R10000 writing a TLB entry for an virtual
192 address that already exists will overwrite the old entry and not result
193 in TLB malfunction or TLB shutdown. */
194void __update_tlb(struct vm_area_struct * vma, unsigned long address, pte_t pte)
195{
196 unsigned long flags;
197 pgd_t *pgdp;
198 pud_t *pudp;
199 pmd_t *pmdp;
200 pte_t *ptep;
201 int idx, pid;
202
203 /*
204 * Handle debugger faulting in for debugee.
205 */
206 if (current->active_mm != vma->vm_mm)
207 return;
208
209 pid = read_c0_entryhi() & ASID_MASK;
210
211 if ((pid != (cpu_context(smp_processor_id(), vma->vm_mm) & ASID_MASK))
212 || (cpu_context(smp_processor_id(), vma->vm_mm) == 0)) {
213 printk(KERN_WARNING
214 "%s: Wheee, bogus tlbpid mmpid=%d tlbpid=%d\n",
215 __FUNCTION__, (int) (cpu_context(smp_processor_id(),
216 vma->vm_mm) & ASID_MASK), pid);
217 }
218
219 local_irq_save(flags);
220 address &= (PAGE_MASK << 1);
221 write_c0_entryhi(address | (pid));
222 pgdp = pgd_offset(vma->vm_mm, address);
223 tlb_probe();
224 pudp = pud_offset(pgdp, address);
225 pmdp = pmd_offset(pudp, address);
226 idx = read_c0_index();
227 ptep = pte_offset_map(pmdp, address);
228 write_c0_entrylo0(pte_val(*ptep++) >> 6);
229 write_c0_entrylo1(pte_val(*ptep) >> 6);
230 write_c0_entryhi(address | pid);
231 if (idx < 0) {
232 tlb_write_random();
233 } else {
234 tlb_write_indexed();
235 }
236 write_c0_entryhi(pid);
237 local_irq_restore(flags);
238}
239
240void __init tlb_init(void)
241{
242 /*
243 * You should never change this register:
244 * - On R4600 1.7 the tlbp never hits for pages smaller than
245 * the value in the c0_pagemask register.
246 * - The entire mm handling assumes the c0_pagemask register to
247 * be set for 4kb pages.
248 */
249 write_c0_pagemask(PM_4K);
250 write_c0_wired(0);
251 write_c0_framemask(0);
252
253 /* From this point on the ARC firmware is dead. */
254 local_flush_tlb_all();
255
256 /* Did I tell you that ARC SUCKS? */
257
258 build_tlb_refill_handler();
259}
generated by cgit v1.2.2 (git 2.25.0) at 2025-10-24 20:48:16 -0400