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Add mmu translate and unmap methods (Igor Kovalenko)

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git-svn-id: svn://coreboot.org/openbios/openbios-devel@238 f158a5a8-5612-0410-a976-696ce0be7e32
This commit is contained in:
Blue Swirl
2008-09-27 19:45:19 +00:00
parent aee05c163e
commit 94f0e664a8
1 changed files with 69 additions and 15 deletions
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84
arch/sparc64/openbios.c
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@@ -85,18 +85,13 @@ mmu_close(void)
{
}
/*
3.6.5 translate
( virt -- false | phys.lo ... phys.hi mode true )
*/
static void
mmu_translate(void)
static int
spitfire_translate(unsigned long virt, unsigned long *p_phys,
unsigned long *p_data, unsigned long *p_size)
{
unsigned long virt, phys, tag, data, mask;
unsigned long phys, tag, data, mask, size;
unsigned int i;
virt = POP();
for (i = 0; i < 64; i++) {
data = spitfire_get_dtlb_data(i);
if (data & 0x8000000000000000) { // Valid entry?
@@ -104,29 +99,54 @@ mmu_translate(void)
default:
case 0x0: // 8k
mask = 0xffffffffffffe000ULL;
size = PAGE_SIZE_8K;
break;
case 0x1: // 64k
mask = 0xffffffffffff0000ULL;
size = PAGE_SIZE_64K;
break;
case 0x2: // 512k
mask = 0xfffffffffff80000ULL;
size = PAGE_SIZE_512K;
break;
case 0x3: // 4M
mask = 0xffffffffffc00000ULL;
size = PAGE_SIZE_4M;
break;
}
tag = spitfire_get_dtlb_tag(i);
if ((virt & mask) == (tag & mask)) {
phys = data & mask & 0x000001fffffff000;
phys |= virt & ~mask;
PUSH(phys & 0xffffffff);
PUSH(phys >> 32);
PUSH(data & 0xfff);
PUSH(-1);
return;
*p_phys = phys;
*p_data = data & 0xfff;
*p_size = size;
return -1;
}
}
}
return 0;
}
/*
3.6.5 translate
( virt -- false | phys.lo ... phys.hi mode true )
*/
static void
mmu_translate(void)
{
unsigned long virt, phys, data, size;
virt = POP();
if (spitfire_translate(virt, &phys, &data, &size)) {
PUSH(phys & 0xffffffff);
PUSH(phys >> 32);
PUSH(data);
PUSH(-1);
return;
}
PUSH(0);
}
@@ -250,6 +270,40 @@ mmu_map(void)
map_pages(virt, size, phys);
}
static void
itlb_demap(unsigned long vaddr)
{
asm("stxa %0, [%0] %1\n"
: : "r" (vaddr), "i" (ASI_IMMU_DEMAP));
}
static void
dtlb_demap(unsigned long vaddr)
{
asm("stxa %0, [%0] %1\n"
: : "r" (vaddr), "i" (ASI_DMMU_DEMAP));
}
static void
unmap_pages(unsigned long virt, unsigned long size)
{
unsigned long phys, data;
unsigned long tte_data, currsize;
// align size
size = (size + PAGE_MASK_8K) & ~PAGE_MASK_8K;
while (spitfire_translate(virt, &phys, &data, &currsize)) {
itlb_demap(virt & ~0x1fffULL);
dtlb_demap(virt & ~0x1fffULL);
size -= currsize;
virt += currsize;
}
}
/*
3.6.5 unmap
( virt size -- )
@@ -261,7 +315,7 @@ mmu_unmap(void)
size = POP();
virt = POP();
//unmap_pages(virt, size);
unmap_pages(virt, size);
}
/*