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提交 547c28fc 创建 作者: Frans Kaashoek's avatar Frans Kaashoek
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Don't map IO space in the user part of the address space

Passes all tests now (but need to update usertests to allow for more than 640k)
上级 9aa0337d
隐藏空白字符变更
内嵌 并排
正在显示 包含 11 行增加 和 10 行删除
kalloc.c
浏览文件 @ 547c28fc
...@@ -56,7 +56,7 @@ kfree(char *v) ...@@ -56,7 +56,7 @@ kfree(char *v)
{ {
struct run *r; struct run *r;
if((uint)v % PGSIZE || v < end || v2p(v) >= PHYSTOP) if((uint)v % PGSIZE || v < end || v2p(v) >= PHYSTOP)
panic("kfree"); panic("kfree");
// Fill with junk to catch dangling refs. // Fill with junk to catch dangling refs.
...@@ -82,7 +82,6 @@ kalloc(void) ...@@ -82,7 +82,6 @@ kalloc(void)
if(r) if(r)
kmem.freelist = r->next; kmem.freelist = r->next;
release(&kmem.lock); release(&kmem.lock);
cprintf("kalloc: 0x%x\n", r);
return (char*)r; return (char*)r;
} }
vm.c
浏览文件 @ 547c28fc
...@@ -175,7 +175,6 @@ static struct kmap { ...@@ -175,7 +175,6 @@ static struct kmap {
uint e; uint e;
int perm; int perm;
} kmap[] = { } kmap[] = {
{ (void *)IOSPACEB, IOSPACEB, IOSPACEE, PTE_W}, // I/O space
{ P2V(IOSPACEB), IOSPACEB, IOSPACEE, PTE_W}, // I/O space { P2V(IOSPACEB), IOSPACEB, IOSPACEE, 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
...@@ -288,7 +287,7 @@ loaduvm(pde_t *pgdir, char *addr, struct inode *ip, uint offset, uint sz) ...@@ -288,7 +287,7 @@ loaduvm(pde_t *pgdir, char *addr, struct inode *ip, uint offset, uint sz)
n = sz - i; n = sz - i;
else else
n = PGSIZE; n = PGSIZE;
if(readi(ip, (char*)pa, offset+i, n) != n) if(readi(ip, p2v(pa), offset+i, n) != n)
return -1; return -1;
} }
return 0; return 0;
...@@ -341,7 +340,8 @@ deallocuvm(pde_t *pgdir, uint oldsz, uint newsz) ...@@ -341,7 +340,8 @@ deallocuvm(pde_t *pgdir, uint oldsz, uint newsz)
pa = PTE_ADDR(*pte); pa = PTE_ADDR(*pte);
if(pa == 0) if(pa == 0)
panic("kfree"); panic("kfree");
kfree((char*)pa); char *v = p2v(pa);
kfree(v);
*pte = 0; *pte = 0;
} }
} }
...@@ -359,8 +359,10 @@ freevm(pde_t *pgdir) ...@@ -359,8 +359,10 @@ freevm(pde_t *pgdir)
panic("freevm: no pgdir"); panic("freevm: no pgdir");
deallocuvm(pgdir, USERTOP, 0); deallocuvm(pgdir, USERTOP, 0);
for(i = 0; i < NPDENTRIES; i++){ for(i = 0; i < NPDENTRIES; i++){
if(pgdir[i] & PTE_P) if(pgdir[i] & PTE_P) {
kfree(p2v(PTE_ADDR(pgdir[i]))); char * v = p2v(PTE_ADDR(pgdir[i]));
kfree(v);
}
} }
kfree((char*)pgdir); kfree((char*)pgdir);
} }
...@@ -385,7 +387,7 @@ copyuvm(pde_t *pgdir, uint sz) ...@@ -385,7 +387,7 @@ copyuvm(pde_t *pgdir, uint sz)
pa = PTE_ADDR(*pte); pa = PTE_ADDR(*pte);
if((mem = kalloc()) == 0) if((mem = kalloc()) == 0)
goto bad; goto bad;
memmove(mem, (char*)pa, PGSIZE); memmove(mem, (char*)p2v(pa), PGSIZE);
if(mappages(d, (void*)i, PGSIZE, v2p(mem), PTE_W|PTE_U) < 0) if(mappages(d, (void*)i, PGSIZE, v2p(mem), PTE_W|PTE_U) < 0)
goto bad; goto bad;
} }
...@@ -397,7 +399,7 @@ bad: ...@@ -397,7 +399,7 @@ bad:
} }
//PAGEBREAK! //PAGEBREAK!
// Map user virtual address to kernel physical address. // Map user virtual address to kernel address.
char* char*
uva2ka(pde_t *pgdir, char *uva) uva2ka(pde_t *pgdir, char *uva)
{ {
...@@ -408,7 +410,7 @@ uva2ka(pde_t *pgdir, char *uva) ...@@ -408,7 +410,7 @@ uva2ka(pde_t *pgdir, char *uva)
return 0; return 0;
if((*pte & PTE_U) == 0) if((*pte & PTE_U) == 0)
return 0; return 0;
return (char*)PTE_ADDR(*pte); return (char*)p2v(PTE_ADDR(*pte));
} }
// Copy len bytes from p to user address va in page table pgdir. // Copy len bytes from p to user address va in page table pgdir.
......
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