29,6 → 29,7 |
#include <arch/mm/tlb.h> |
#include <arch/types.h> |
#include <mm/tlb.h> |
#include <mm/frame.h> |
#include <mm/page.h> |
#include <mm/as.h> |
#include <arch.h> |
36,6 → 37,9 |
#include <symtab.h> |
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static phte_t *phte; |
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/** Initialize Page Hash Table. |
* |
* Setup the Page Hash Table with no entries. |
43,6 → 47,18 |
*/ |
void tlb_arch_init(void) |
{ |
phte_t *physical_phte = (phte_t *) PFN2ADDR(frame_alloc(PHT_ORDER, FRAME_KA | FRAME_PANIC)); |
phte =(phte_t *) PA2KA((__address) physical_phte); |
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ASSERT((__address) physical_phte % (1 << PHT_BITS) == 0); |
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memsetb((__address) phte, 1 << PHT_BITS, 0); |
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asm volatile ( |
"mtsdr1 %0\n" |
: |
: "r" ((__address) physical_phte) |
); |
} |
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103,25 → 119,34 |
s = get_symtab_entry(istate->lr); |
if (s) |
sym2 = s; |
panic("%X: PHT Refill Exception at %X(%s<-%s)\n", badvaddr, istate->pc, symbol, sym2); |
panic("%p: PHT Refill Exception at %p (%s<-%s)\n", badvaddr, istate->pc, symbol, sym2); |
} |
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/** Process Data Storage Interrupt |
/** Process Instruction/Data Storage Interrupt |
* |
* @param data True if Data Storage Interrupt. |
* @param istate Interrupted register context. |
* |
*/ |
void pht_refill(istate_t *istate) |
void pht_refill(bool data, istate_t *istate) |
{ |
asid_t asid; |
__address badvaddr; |
pte_t *pte; |
__u32 page; |
__u32 api; |
__u32 vsid; |
__u32 hash; |
__u32 i; |
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__asm__ volatile ( |
if (data) { |
asm volatile ( |
"mfdar %0\n" |
: "=r" (badvaddr) |
); |
} else |
badvaddr = istate->pc; |
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spinlock_lock(&AS->lock); |
asid = AS->asid; |
133,13 → 158,40 |
if (!pte) |
goto fail; |
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/* |
* Record access to PTE. |
*/ |
/* Record access to PTE */ |
pte->a = 1; |
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// FIXME: Insert entry into PHT |
page = ADDR2PFN(badvaddr); |
api = (badvaddr >> 22) & 0x3f; |
asm volatile ( |
"mfsrin %0, %1\n" |
: "=r" (vsid) |
: "r" (badvaddr >> 28) |
); |
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/* Primary hash (xor) */ |
hash = ((vsid ^ page) & 0x3ff) << 3; |
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/* Find invalid PTE in PTEG */ |
for (i = 0; i < 8; i++) { |
if (!phte[hash + i].v) |
break; |
} |
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// TODO: Check access/change bits, secondary hash |
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if (i == 8) |
i = page % 8; |
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phte[hash + i].v = 1; |
phte[hash + i].vsid = vsid; |
phte[hash + i].h = 0; |
phte[hash + i].api = api; |
phte[hash + i].rpn = pte->pfn; |
phte[hash + i].r = 0; |
phte[hash + i].c = 0; |
phte[hash + i].pp = 2; // FIXME |
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page_table_unlock(AS, true); |
return; |
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