forked from luck/tmp_suning_uos_patched
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
370 lines
12 KiB
C
370 lines
12 KiB
C
/*
|
|
* Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#include "linux/mm.h"
|
|
#include "asm/page.h"
|
|
#include "asm/pgalloc.h"
|
|
#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"
|
|
|
|
#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 data,
|
|
void (*do_ops)(int, struct host_vm_op *, int))
|
|
{
|
|
pgd_t *npgd;
|
|
pud_t *npud;
|
|
pmd_t *npmd;
|
|
pte_t *npte;
|
|
unsigned long addr, end;
|
|
int r, w, x;
|
|
struct host_vm_op ops[16];
|
|
int op_index = -1, last_op = sizeof(ops) / sizeof(ops[0]) - 1;
|
|
|
|
if(mm == NULL) return;
|
|
|
|
for(addr = start_addr; addr < end_addr;){
|
|
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)){
|
|
op_index = add_munmap(addr, end - addr, ops,
|
|
op_index, last_op, data,
|
|
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)){
|
|
op_index = add_munmap(addr, end - addr, ops,
|
|
op_index, last_op, data,
|
|
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)){
|
|
op_index = add_munmap(addr, end - addr, ops,
|
|
op_index, last_op, data,
|
|
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_dirty(*npte))
|
|
w = 0;
|
|
if(!pte_young(*npte)){
|
|
r = 0;
|
|
w = 0;
|
|
}
|
|
if(force || pte_newpage(*npte)){
|
|
if(pte_present(*npte))
|
|
op_index = add_mmap(addr,
|
|
pte_val(*npte) & PAGE_MASK,
|
|
PAGE_SIZE, r, w, x, ops,
|
|
op_index, last_op, data,
|
|
do_ops);
|
|
else op_index = add_munmap(addr, PAGE_SIZE, ops,
|
|
op_index, last_op, data,
|
|
do_ops);
|
|
}
|
|
else if(pte_newprot(*npte))
|
|
op_index = add_mprotect(addr, PAGE_SIZE, r, w, x, ops,
|
|
op_index, last_op, data,
|
|
do_ops);
|
|
|
|
*npte = pte_mkuptodate(*npte);
|
|
addr += PAGE_SIZE;
|
|
}
|
|
(*do_ops)(data, ops, op_index);
|
|
}
|
|
|
|
int flush_tlb_kernel_range_common(unsigned long start, unsigned long end)
|
|
{
|
|
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;
|
|
protect_memory(addr, PAGE_SIZE, 1, 1, 1, 1);
|
|
}
|
|
addr += PAGE_SIZE;
|
|
}
|
|
return(updated);
|
|
}
|
|
|
|
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());
|
|
}
|
|
|
|
pgd_t *pgd_offset_proc(struct mm_struct *mm, unsigned long address)
|
|
{
|
|
return(pgd_offset(mm, address));
|
|
}
|
|
|
|
pud_t *pud_offset_proc(pgd_t *pgd, unsigned long address)
|
|
{
|
|
return(pud_offset(pgd, address));
|
|
}
|
|
|
|
pmd_t *pmd_offset_proc(pud_t *pud, unsigned long address)
|
|
{
|
|
return(pmd_offset(pud, address));
|
|
}
|
|
|
|
pte_t *pte_offset_proc(pmd_t *pmd, unsigned long address)
|
|
{
|
|
return(pte_offset_kernel(pmd, address));
|
|
}
|
|
|
|
pte_t *addr_pte(struct task_struct *task, unsigned long addr)
|
|
{
|
|
pgd_t *pgd = pgd_offset(task->mm, addr);
|
|
pud_t *pud = pud_offset(pgd, addr);
|
|
pmd_t *pmd = pmd_offset(pud, addr);
|
|
|
|
return(pte_offset_map(pmd, addr));
|
|
}
|
|
|
|
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, int data,
|
|
void (*do_ops)(int, struct host_vm_op *, int))
|
|
{
|
|
__u64 offset;
|
|
struct host_vm_op *last;
|
|
int fd;
|
|
|
|
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(index);
|
|
}
|
|
}
|
|
|
|
if(index == last_filled){
|
|
(*do_ops)(data, ops, last_filled);
|
|
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(index);
|
|
}
|
|
|
|
int add_munmap(unsigned long addr, unsigned long len, struct host_vm_op *ops,
|
|
int index, int last_filled, int data,
|
|
void (*do_ops)(int, struct host_vm_op *, int))
|
|
{
|
|
struct host_vm_op *last;
|
|
|
|
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(index);
|
|
}
|
|
}
|
|
|
|
if(index == last_filled){
|
|
(*do_ops)(data, ops, last_filled);
|
|
index = -1;
|
|
}
|
|
|
|
ops[++index] = ((struct host_vm_op) { .type = MUNMAP,
|
|
.u = { .munmap = {
|
|
.addr = addr,
|
|
.len = len } } });
|
|
return(index);
|
|
}
|
|
|
|
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, int data,
|
|
void (*do_ops)(int, struct host_vm_op *, int))
|
|
{
|
|
struct host_vm_op *last;
|
|
|
|
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(index);
|
|
}
|
|
}
|
|
|
|
if(index == last_filled){
|
|
(*do_ops)(data, ops, last_filled);
|
|
index = -1;
|
|
}
|
|
|
|
ops[++index] = ((struct host_vm_op) { .type = MPROTECT,
|
|
.u = { .mprotect = {
|
|
.addr = addr,
|
|
.len = len,
|
|
.r = r,
|
|
.w = w,
|
|
.x = x } } });
|
|
return(index);
|
|
}
|