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Austin Clements 2011-09-02 14:28:44 -04:00
parent cf7b670293
commit 14835ec987
1 changed files with 7 additions and 7 deletions
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14
vm.c
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@ -74,8 +74,8 @@ mappages(pde_t *pgdir, void *va, uint size, uint pa,
char *a, *last; char *a, *last;
pte_t *pte; pte_t *pte;
a = (char *) PGROUNDDOWN((uint) va); a = (char*)PGROUNDDOWN((uint)va);
last = (char *) PGROUNDDOWN(((uint) va) + size - 1); last = (char*)PGROUNDDOWN(((uint)va) + size - 1);
for(;;){ for(;;){
if((pte = walkpgdir(pgdir, a, alloc) == 0) if((pte = walkpgdir(pgdir, a, alloc) == 0)
return -1; return -1;
@ -119,7 +119,7 @@ static struct kmap {
int perm; int perm;
} kmap[] = { } kmap[] = {
{ P2V(0), 0, 1024*1024, PTE_W}, // I/O space { P2V(0), 0, 1024*1024, PTE_W}, // I/O space
{ (void *)KERNLINK, V2P(KERNLINK), V2P(data), 0}, // kernel text+rodata { (void*)KERNLINK, V2P(KERNLINK), V2P(data), 0}, // kernel text+rodata
{ data, V2P(data), PHYSTOP, PTE_W}, // kernel data, memory { data, V2P(data), PHYSTOP, PTE_W}, // kernel data, memory
{ (void*)DEVSPACE, DEVSPACE, 0, PTE_W}, // more devices { (void*)DEVSPACE, DEVSPACE, 0, PTE_W}, // more devices
}; };
@ -135,7 +135,7 @@ setupkvm(char* (*alloc)(void))
return 0; return 0;
memset(pgdir, 0, PGSIZE); memset(pgdir, 0, PGSIZE);
k = kmap; k = kmap;
if (p2v(PHYSTOP) > (void *) DEVSPACE) if (p2v(PHYSTOP) > (void*)DEVSPACE)
panic("PHYSTOP too high"); panic("PHYSTOP too high");
for(k = kmap; k < &kmap[NELEM(kmap)]; k++) for(k = kmap; k < &kmap[NELEM(kmap)]; k++)
if(mappages(pgdir, k->virt, k->phys_end - k->phys_start, if(mappages(pgdir, k->virt, k->phys_end - k->phys_start,
@ -201,7 +201,7 @@ loaduvm(pde_t *pgdir, char *addr, struct inode *ip, uint offset, uint sz)
uint i, pa, n; uint i, pa, n;
pte_t *pte; pte_t *pte;
if((uint)addr % PGSIZE != 0) if((uint) addr % PGSIZE != 0)
panic("loaduvm: addr must be page aligned"); panic("loaduvm: addr must be page aligned");
for(i = 0; i < sz; i += PGSIZE){ for(i = 0; i < sz; i += PGSIZE){
if((pte = walkpgdir(pgdir, addr+i, 0)) == 0) if((pte = walkpgdir(pgdir, addr+i, 0)) == 0)
@ -285,7 +285,7 @@ freevm(pde_t *pgdir)
panic("freevm: no pgdir"); panic("freevm: no pgdir");
deallocuvm(pgdir, KERNBASE, 0); deallocuvm(pgdir, KERNBASE, 0);
for(i = 0; i < NPDENTRIES; i++){ for(i = 0; i < NPDENTRIES; i++){
if(pgdir[i] & PTE_P) { if(pgdir[i] & PTE_P){
char * v = p2v(PTE_ADDR(pgdir[i])); char * v = p2v(PTE_ADDR(pgdir[i]));
kfree(v); kfree(v);
} }
@ -306,7 +306,7 @@ copyuvm(pde_t *pgdir, uint sz)
if((d = setupkvm(kalloc)) == 0) if((d = setupkvm(kalloc)) == 0)
return 0; return 0;
for(i = 0; i < sz; i += PGSIZE){ for(i = 0; i < sz; i += PGSIZE){
if((pte = walkpgdir(pgdir, (void*)i, 0)) == 0) if((pte = walkpgdir(pgdir, (void *) i, 0)) == 0)
panic("copyuvm: pte should exist"); panic("copyuvm: pte should exist");
if(!(*pte & PTE_P)) if(!(*pte & PTE_P))
panic("copyuvm: page not present"); panic("copyuvm: page not present");