-/*
+/*
* Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
#include "asm/tlbflush.h"
#include "choose-mode.h"
#include "mode_kern.h"
+#include "user_util.h"
+#include "tlb.h"
+#include "mem.h"
+#include "mem_user.h"
+#include "os.h"
-void flush_tlb_page(struct vm_area_struct *vma, unsigned long address)
+static int add_mmap(unsigned long virt, unsigned long phys, unsigned long len,
+ int r, int w, int x, struct host_vm_op *ops, int *index,
+ int last_filled, union mm_context *mmu, void **flush,
+ int (*do_ops)(union mm_context *, struct host_vm_op *,
+ int, int, void **))
{
- address &= PAGE_MASK;
- flush_tlb_range(vma, address, address + PAGE_SIZE);
-}
+ __u64 offset;
+ struct host_vm_op *last;
+ int fd, ret = 0;
-void flush_tlb_all(void)
-{
- flush_tlb_mm(current->mm);
-}
-
-void flush_tlb_kernel_range(unsigned long start, unsigned long end)
-{
- CHOOSE_MODE_PROC(flush_tlb_kernel_range_tt,
- flush_tlb_kernel_range_skas, start, end);
-}
+ fd = phys_mapping(phys, &offset);
+ if(*index != -1){
+ last = &ops[*index];
+ if((last->type == MMAP) &&
+ (last->u.mmap.addr + last->u.mmap.len == virt) &&
+ (last->u.mmap.r == r) && (last->u.mmap.w == w) &&
+ (last->u.mmap.x == x) && (last->u.mmap.fd == fd) &&
+ (last->u.mmap.offset + last->u.mmap.len == offset)){
+ last->u.mmap.len += len;
+ return 0;
+ }
+ }
-void flush_tlb_kernel_vm(void)
-{
- CHOOSE_MODE(flush_tlb_kernel_vm_tt(), flush_tlb_kernel_vm_skas());
+ if(*index == last_filled){
+ ret = (*do_ops)(mmu, ops, last_filled, 0, flush);
+ *index = -1;
+ }
+
+ ops[++*index] = ((struct host_vm_op) { .type = MMAP,
+ .u = { .mmap = {
+ .addr = virt,
+ .len = len,
+ .r = r,
+ .w = w,
+ .x = x,
+ .fd = fd,
+ .offset = offset }
+ } });
+ return ret;
}
-void __flush_tlb_one(unsigned long addr)
+static int add_munmap(unsigned long addr, unsigned long len,
+ struct host_vm_op *ops, int *index, int last_filled,
+ union mm_context *mmu, void **flush,
+ int (*do_ops)(union mm_context *, struct host_vm_op *,
+ int, int, void **))
{
- CHOOSE_MODE_PROC(__flush_tlb_one_tt, __flush_tlb_one_skas, addr);
+ struct host_vm_op *last;
+ int ret = 0;
+
+ if(*index != -1){
+ last = &ops[*index];
+ if((last->type == MUNMAP) &&
+ (last->u.munmap.addr + last->u.mmap.len == addr)){
+ last->u.munmap.len += len;
+ return 0;
+ }
+ }
+
+ if(*index == last_filled){
+ ret = (*do_ops)(mmu, ops, last_filled, 0, flush);
+ *index = -1;
+ }
+
+ ops[++*index] = ((struct host_vm_op) { .type = MUNMAP,
+ .u = { .munmap = {
+ .addr = addr,
+ .len = len } } });
+ return ret;
}
-void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
- unsigned long end)
+static int add_mprotect(unsigned long addr, unsigned long len, int r, int w,
+ int x, struct host_vm_op *ops, int *index,
+ int last_filled, union mm_context *mmu, void **flush,
+ int (*do_ops)(union mm_context *, struct host_vm_op *,
+ int, int, void **))
{
- CHOOSE_MODE_PROC(flush_tlb_range_tt, flush_tlb_range_skas, vma, start,
- end);
+ struct host_vm_op *last;
+ int ret = 0;
+
+ if(*index != -1){
+ last = &ops[*index];
+ if((last->type == MPROTECT) &&
+ (last->u.mprotect.addr + last->u.mprotect.len == addr) &&
+ (last->u.mprotect.r == r) && (last->u.mprotect.w == w) &&
+ (last->u.mprotect.x == x)){
+ last->u.mprotect.len += len;
+ return 0;
+ }
+ }
+
+ if(*index == last_filled){
+ ret = (*do_ops)(mmu, ops, last_filled, 0, flush);
+ *index = -1;
+ }
+
+ ops[++*index] = ((struct host_vm_op) { .type = MPROTECT,
+ .u = { .mprotect = {
+ .addr = addr,
+ .len = len,
+ .r = r,
+ .w = w,
+ .x = x } } });
+ return ret;
}
-void flush_tlb_mm(struct mm_struct *mm)
+#define ADD_ROUND(n, inc) (((n) + (inc)) & ~((inc) - 1))
+
+void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
+ unsigned long end_addr, int force,
+ int (*do_ops)(union mm_context *, struct host_vm_op *,
+ int, int, void **))
{
- CHOOSE_MODE_PROC(flush_tlb_mm_tt, flush_tlb_mm_skas, mm);
+ pgd_t *npgd;
+ pud_t *npud;
+ pmd_t *npmd;
+ pte_t *npte;
+ union mm_context *mmu = &mm->context;
+ unsigned long addr, end;
+ int r, w, x;
+ struct host_vm_op ops[1];
+ void *flush = NULL;
+ int op_index = -1, last_op = ARRAY_SIZE(ops) - 1;
+ int ret = 0;
+
+ if(mm == NULL)
+ return;
+
+ ops[0].type = NONE;
+ for(addr = start_addr; addr < end_addr && !ret;){
+ npgd = pgd_offset(mm, addr);
+ if(!pgd_present(*npgd)){
+ end = ADD_ROUND(addr, PGDIR_SIZE);
+ if(end > end_addr)
+ end = end_addr;
+ if(force || pgd_newpage(*npgd)){
+ ret = add_munmap(addr, end - addr, ops,
+ &op_index, last_op, mmu,
+ &flush, do_ops);
+ pgd_mkuptodate(*npgd);
+ }
+ addr = end;
+ continue;
+ }
+
+ npud = pud_offset(npgd, addr);
+ if(!pud_present(*npud)){
+ end = ADD_ROUND(addr, PUD_SIZE);
+ if(end > end_addr)
+ end = end_addr;
+ if(force || pud_newpage(*npud)){
+ ret = add_munmap(addr, end - addr, ops,
+ &op_index, last_op, mmu,
+ &flush, do_ops);
+ pud_mkuptodate(*npud);
+ }
+ addr = end;
+ continue;
+ }
+
+ npmd = pmd_offset(npud, addr);
+ if(!pmd_present(*npmd)){
+ end = ADD_ROUND(addr, PMD_SIZE);
+ if(end > end_addr)
+ end = end_addr;
+ if(force || pmd_newpage(*npmd)){
+ ret = add_munmap(addr, end - addr, ops,
+ &op_index, last_op, mmu,
+ &flush, do_ops);
+ pmd_mkuptodate(*npmd);
+ }
+ addr = end;
+ continue;
+ }
+
+ npte = pte_offset_kernel(npmd, addr);
+ r = pte_read(*npte);
+ w = pte_write(*npte);
+ x = pte_exec(*npte);
+ if (!pte_young(*npte)) {
+ r = 0;
+ w = 0;
+ } else if (!pte_dirty(*npte)) {
+ w = 0;
+ }
+ if(force || pte_newpage(*npte)){
+ if(pte_present(*npte))
+ ret = add_mmap(addr,
+ pte_val(*npte) & PAGE_MASK,
+ PAGE_SIZE, r, w, x, ops,
+ &op_index, last_op, mmu,
+ &flush, do_ops);
+ else ret = add_munmap(addr, PAGE_SIZE, ops,
+ &op_index, last_op, mmu,
+ &flush, do_ops);
+ }
+ else if(pte_newprot(*npte))
+ ret = add_mprotect(addr, PAGE_SIZE, r, w, x, ops,
+ &op_index, last_op, mmu,
+ &flush, do_ops);
+
+ *npte = pte_mkuptodate(*npte);
+ addr += PAGE_SIZE;
+ }
+ if(!ret)
+ ret = (*do_ops)(mmu, ops, op_index, 1, &flush);
+
+/* This is not an else because ret is modified above */
+ if(ret) {
+ printk("fix_range_common: failed, killing current process\n");
+ force_sig(SIGKILL, current);
+ }
}
-void force_flush_all(void)
+int flush_tlb_kernel_range_common(unsigned long start, unsigned long end)
{
- CHOOSE_MODE(force_flush_all_tt(), force_flush_all_skas());
+ struct mm_struct *mm;
+ pgd_t *pgd;
+ pud_t *pud;
+ pmd_t *pmd;
+ pte_t *pte;
+ unsigned long addr, last;
+ int updated = 0, err;
+
+ mm = &init_mm;
+ for(addr = start; addr < end;){
+ pgd = pgd_offset(mm, addr);
+ if(!pgd_present(*pgd)){
+ last = ADD_ROUND(addr, PGDIR_SIZE);
+ if(last > end)
+ last = end;
+ if(pgd_newpage(*pgd)){
+ updated = 1;
+ err = os_unmap_memory((void *) addr,
+ last - addr);
+ if(err < 0)
+ panic("munmap failed, errno = %d\n",
+ -err);
+ }
+ addr = last;
+ continue;
+ }
+
+ pud = pud_offset(pgd, addr);
+ if(!pud_present(*pud)){
+ last = ADD_ROUND(addr, PUD_SIZE);
+ if(last > end)
+ last = end;
+ if(pud_newpage(*pud)){
+ updated = 1;
+ err = os_unmap_memory((void *) addr,
+ last - addr);
+ if(err < 0)
+ panic("munmap failed, errno = %d\n",
+ -err);
+ }
+ addr = last;
+ continue;
+ }
+
+ pmd = pmd_offset(pud, addr);
+ if(!pmd_present(*pmd)){
+ last = ADD_ROUND(addr, PMD_SIZE);
+ if(last > end)
+ last = end;
+ if(pmd_newpage(*pmd)){
+ updated = 1;
+ err = os_unmap_memory((void *) addr,
+ last - addr);
+ if(err < 0)
+ panic("munmap failed, errno = %d\n",
+ -err);
+ }
+ addr = last;
+ continue;
+ }
+
+ pte = pte_offset_kernel(pmd, addr);
+ if(!pte_present(*pte) || pte_newpage(*pte)){
+ updated = 1;
+ err = os_unmap_memory((void *) addr,
+ PAGE_SIZE);
+ if(err < 0)
+ panic("munmap failed, errno = %d\n",
+ -err);
+ if(pte_present(*pte))
+ map_memory(addr,
+ pte_val(*pte) & PAGE_MASK,
+ PAGE_SIZE, 1, 1, 1);
+ }
+ else if(pte_newprot(*pte)){
+ updated = 1;
+ os_protect_memory((void *) addr, PAGE_SIZE, 1, 1, 1);
+ }
+ addr += PAGE_SIZE;
+ }
+ return(updated);
}
pgd_t *pgd_offset_proc(struct mm_struct *mm, unsigned long address)
return(pte_offset_map(pmd, addr));
}
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
+void flush_tlb_page(struct vm_area_struct *vma, unsigned long address)
+{
+ address &= PAGE_MASK;
+ flush_tlb_range(vma, address, address + PAGE_SIZE);
+}
+
+void flush_tlb_all(void)
+{
+ flush_tlb_mm(current->mm);
+}
+
+void flush_tlb_kernel_range(unsigned long start, unsigned long end)
+{
+ CHOOSE_MODE_PROC(flush_tlb_kernel_range_tt,
+ flush_tlb_kernel_range_common, start, end);
+}
+
+void flush_tlb_kernel_vm(void)
+{
+ CHOOSE_MODE(flush_tlb_kernel_vm_tt(),
+ flush_tlb_kernel_range_common(start_vm, end_vm));
+}
+
+void __flush_tlb_one(unsigned long addr)
+{
+ CHOOSE_MODE_PROC(__flush_tlb_one_tt, __flush_tlb_one_skas, addr);
+}
+
+void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
+ unsigned long end)
+{
+ CHOOSE_MODE_PROC(flush_tlb_range_tt, flush_tlb_range_skas, vma, start,
+ end);
+}
+
+void flush_tlb_mm(struct mm_struct *mm)
+{
+ CHOOSE_MODE_PROC(flush_tlb_mm_tt, flush_tlb_mm_skas, mm);
+}
+
+void force_flush_all(void)
+{
+ CHOOSE_MODE(force_flush_all_tt(), force_flush_all_skas());
+}
+
git://git.onelab.eu / linux-2.6.git / blobdiff