2 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
8 #include "asm/pgalloc.h"
9 #include "asm/pgtable.h"
10 #include "asm/tlbflush.h"
11 #include "choose-mode.h"
12 #include "mode_kern.h"
13 #include "as-layout.h"
19 static int add_mmap(unsigned long virt, unsigned long phys, unsigned long len,
20 int r, int w, int x, struct host_vm_op *ops, int *index,
21 int last_filled, union mm_context *mmu, void **flush,
22 int (*do_ops)(union mm_context *, struct host_vm_op *,
26 struct host_vm_op *last;
29 fd = phys_mapping(phys, &offset);
32 if((last->type == MMAP) &&
33 (last->u.mmap.addr + last->u.mmap.len == virt) &&
34 (last->u.mmap.r == r) && (last->u.mmap.w == w) &&
35 (last->u.mmap.x == x) && (last->u.mmap.fd == fd) &&
36 (last->u.mmap.offset + last->u.mmap.len == offset)){
37 last->u.mmap.len += len;
42 if(*index == last_filled){
43 ret = (*do_ops)(mmu, ops, last_filled, 0, flush);
47 ops[++*index] = ((struct host_vm_op) { .type = MMAP,
60 static int add_munmap(unsigned long addr, unsigned long len,
61 struct host_vm_op *ops, int *index, int last_filled,
62 union mm_context *mmu, void **flush,
63 int (*do_ops)(union mm_context *, struct host_vm_op *,
66 struct host_vm_op *last;
71 if((last->type == MUNMAP) &&
72 (last->u.munmap.addr + last->u.mmap.len == addr)){
73 last->u.munmap.len += len;
78 if(*index == last_filled){
79 ret = (*do_ops)(mmu, ops, last_filled, 0, flush);
83 ops[++*index] = ((struct host_vm_op) { .type = MUNMAP,
90 static int add_mprotect(unsigned long addr, unsigned long len, int r, int w,
91 int x, struct host_vm_op *ops, int *index,
92 int last_filled, union mm_context *mmu, void **flush,
93 int (*do_ops)(union mm_context *, struct host_vm_op *,
96 struct host_vm_op *last;
101 if((last->type == MPROTECT) &&
102 (last->u.mprotect.addr + last->u.mprotect.len == addr) &&
103 (last->u.mprotect.r == r) && (last->u.mprotect.w == w) &&
104 (last->u.mprotect.x == x)){
105 last->u.mprotect.len += len;
110 if(*index == last_filled){
111 ret = (*do_ops)(mmu, ops, last_filled, 0, flush);
115 ops[++*index] = ((struct host_vm_op) { .type = MPROTECT,
125 #define ADD_ROUND(n, inc) (((n) + (inc)) & ~((inc) - 1))
127 static inline int update_pte_range(pmd_t *pmd, unsigned long addr,
128 unsigned long end, struct host_vm_op *ops,
129 int last_op, int *op_index, int force,
130 union mm_context *mmu, void **flush,
131 int (*do_ops)(union mm_context *,
132 struct host_vm_op *, int, int,
136 int r, w, x, ret = 0;
138 pte = pte_offset_kernel(pmd, addr);
143 if (!pte_young(*pte)) {
146 } else if (!pte_dirty(*pte)) {
149 if(force || pte_newpage(*pte)){
150 if(pte_present(*pte))
151 ret = add_mmap(addr, pte_val(*pte) & PAGE_MASK,
152 PAGE_SIZE, r, w, x, ops,
153 op_index, last_op, mmu, flush,
155 else ret = add_munmap(addr, PAGE_SIZE, ops, op_index,
156 last_op, mmu, flush, do_ops);
158 else if(pte_newprot(*pte))
159 ret = add_mprotect(addr, PAGE_SIZE, r, w, x, ops,
160 op_index, last_op, mmu, flush,
162 *pte = pte_mkuptodate(*pte);
163 } while (pte++, addr += PAGE_SIZE, ((addr != end) && !ret));
167 static inline int update_pmd_range(pud_t *pud, unsigned long addr,
168 unsigned long end, struct host_vm_op *ops,
169 int last_op, int *op_index, int force,
170 union mm_context *mmu, void **flush,
171 int (*do_ops)(union mm_context *,
172 struct host_vm_op *, int, int,
179 pmd = pmd_offset(pud, addr);
181 next = pmd_addr_end(addr, end);
182 if(!pmd_present(*pmd)){
183 if(force || pmd_newpage(*pmd)){
184 ret = add_munmap(addr, next - addr, ops,
185 op_index, last_op, mmu,
187 pmd_mkuptodate(*pmd);
190 else ret = update_pte_range(pmd, addr, next, ops, last_op,
191 op_index, force, mmu, flush,
193 } while (pmd++, addr = next, ((addr != end) && !ret));
197 static inline int update_pud_range(pgd_t *pgd, unsigned long addr,
198 unsigned long end, struct host_vm_op *ops,
199 int last_op, int *op_index, int force,
200 union mm_context *mmu, void **flush,
201 int (*do_ops)(union mm_context *,
202 struct host_vm_op *, int, int,
209 pud = pud_offset(pgd, addr);
211 next = pud_addr_end(addr, end);
212 if(!pud_present(*pud)){
213 if(force || pud_newpage(*pud)){
214 ret = add_munmap(addr, next - addr, ops,
215 op_index, last_op, mmu,
217 pud_mkuptodate(*pud);
220 else ret = update_pmd_range(pud, addr, next, ops, last_op,
221 op_index, force, mmu, flush,
223 } while (pud++, addr = next, ((addr != end) && !ret));
227 void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
228 unsigned long end_addr, int force,
229 int (*do_ops)(union mm_context *, struct host_vm_op *,
233 union mm_context *mmu = &mm->context;
234 struct host_vm_op ops[1];
235 unsigned long addr = start_addr, next;
236 int ret = 0, last_op = ARRAY_SIZE(ops) - 1, op_index = -1;
240 pgd = pgd_offset(mm, addr);
242 next = pgd_addr_end(addr, end_addr);
243 if(!pgd_present(*pgd)){
244 if (force || pgd_newpage(*pgd)){
245 ret = add_munmap(addr, next - addr, ops,
246 &op_index, last_op, mmu,
248 pgd_mkuptodate(*pgd);
251 else ret = update_pud_range(pgd, addr, next, ops, last_op,
252 &op_index, force, mmu, &flush,
254 } while (pgd++, addr = next, ((addr != end_addr) && !ret));
255 log_info("total flush time - %Ld nsecs\n", end_time - start_time);
258 ret = (*do_ops)(mmu, ops, op_index, 1, &flush);
260 /* This is not an else because ret is modified above */
262 printk("fix_range_common: failed, killing current process\n");
263 force_sig(SIGKILL, current);
267 int flush_tlb_kernel_range_common(unsigned long start, unsigned long end)
269 struct mm_struct *mm;
274 unsigned long addr, last;
275 int updated = 0, err;
278 for(addr = start; addr < end;){
279 pgd = pgd_offset(mm, addr);
280 if(!pgd_present(*pgd)){
281 last = ADD_ROUND(addr, PGDIR_SIZE);
284 if(pgd_newpage(*pgd)){
286 err = os_unmap_memory((void *) addr,
289 panic("munmap failed, errno = %d\n",
296 pud = pud_offset(pgd, addr);
297 if(!pud_present(*pud)){
298 last = ADD_ROUND(addr, PUD_SIZE);
301 if(pud_newpage(*pud)){
303 err = os_unmap_memory((void *) addr,
306 panic("munmap failed, errno = %d\n",
313 pmd = pmd_offset(pud, addr);
314 if(!pmd_present(*pmd)){
315 last = ADD_ROUND(addr, PMD_SIZE);
318 if(pmd_newpage(*pmd)){
320 err = os_unmap_memory((void *) addr,
323 panic("munmap failed, errno = %d\n",
330 pte = pte_offset_kernel(pmd, addr);
331 if(!pte_present(*pte) || pte_newpage(*pte)){
333 err = os_unmap_memory((void *) addr,
336 panic("munmap failed, errno = %d\n",
338 if(pte_present(*pte))
340 pte_val(*pte) & PAGE_MASK,
343 else if(pte_newprot(*pte)){
345 os_protect_memory((void *) addr, PAGE_SIZE, 1, 1, 1);
352 pgd_t *pgd_offset_proc(struct mm_struct *mm, unsigned long address)
354 return(pgd_offset(mm, address));
357 pud_t *pud_offset_proc(pgd_t *pgd, unsigned long address)
359 return(pud_offset(pgd, address));
362 pmd_t *pmd_offset_proc(pud_t *pud, unsigned long address)
364 return(pmd_offset(pud, address));
367 pte_t *pte_offset_proc(pmd_t *pmd, unsigned long address)
369 return(pte_offset_kernel(pmd, address));
372 pte_t *addr_pte(struct task_struct *task, unsigned long addr)
374 pgd_t *pgd = pgd_offset(task->mm, addr);
375 pud_t *pud = pud_offset(pgd, addr);
376 pmd_t *pmd = pmd_offset(pud, addr);
378 return(pte_offset_map(pmd, addr));
381 void flush_tlb_page(struct vm_area_struct *vma, unsigned long address)
383 address &= PAGE_MASK;
384 flush_tlb_range(vma, address, address + PAGE_SIZE);
387 void flush_tlb_all(void)
389 flush_tlb_mm(current->mm);
392 void flush_tlb_kernel_range(unsigned long start, unsigned long end)
394 CHOOSE_MODE_PROC(flush_tlb_kernel_range_tt,
395 flush_tlb_kernel_range_common, start, end);
398 void flush_tlb_kernel_vm(void)
400 CHOOSE_MODE(flush_tlb_kernel_vm_tt(),
401 flush_tlb_kernel_range_common(start_vm, end_vm));
404 void __flush_tlb_one(unsigned long addr)
406 CHOOSE_MODE_PROC(__flush_tlb_one_tt, __flush_tlb_one_skas, addr);
409 void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
412 CHOOSE_MODE_PROC(flush_tlb_range_tt, flush_tlb_range_skas, vma, start,
416 void flush_tlb_mm(struct mm_struct *mm)
418 CHOOSE_MODE_PROC(flush_tlb_mm_tt, flush_tlb_mm_skas, mm);
421 void force_flush_all(void)
423 CHOOSE_MODE(force_flush_all_tt(), force_flush_all_skas());