Linux-2.6.12-rc2
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!
diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c
new file mode 100644
index 0000000..eda477e
--- /dev/null
+++ b/arch/um/kernel/tlb.c
@@ -0,0 +1,369 @@
+/*
+ * 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);
+}