29,11 → 29,24 |
#include <arch/mm/tlb.h> |
#include <arch/mm/asid.h> |
#include <mm/tlb.h> |
#include <mm/page.h> |
#include <mm/vm.h> |
#include <arch/cp0.h> |
#include <panic.h> |
#include <arch.h> |
#include <symtab.h> |
#include <synch/spinlock.h> |
#include <print.h> |
|
static void tlb_refill_fail(struct exception_regdump *pstate); |
static void tlb_invalid_fail(struct exception_regdump *pstate); |
static void tlb_modified_fail(struct exception_regdump *pstate); |
|
/** Initialize TLB |
* |
* Initialize TLB. |
* Invalidate all entries and mark wired entries. |
*/ |
void tlb_init_arch(void) |
{ |
int i; |
47,19 → 60,88 |
* Invalidate all entries. |
*/ |
for (i = 0; i < TLB_SIZE; i++) { |
cp0_index_write(0); |
cp0_index_write(i); |
tlbwi(); |
} |
|
/* |
* The kernel is going to make use of some wired |
* entries (e.g. mapping kernel stacks). |
* entries (e.g. mapping kernel stacks in kseg3). |
*/ |
cp0_wired_write(TLB_WIRED); |
} |
|
/** Process TLB Refill Exception |
* |
* Process TLB Refill Exception. |
* |
* @param pstate Interrupted register context. |
*/ |
void tlb_refill(struct exception_regdump *pstate) |
{ |
struct entry_hi hi; |
__address badvaddr; |
pte_t *pte; |
|
*((__u32 *) &hi) = cp0_entry_hi_read(); |
badvaddr = cp0_badvaddr_read(); |
|
spinlock_lock(&VM->lock); |
|
/* |
* Refill cannot succeed if the ASIDs don't match. |
*/ |
if (hi.asid != VM->asid) |
goto fail; |
|
/* |
* Refill cannot succeed if badvaddr is not |
* associated with any mapping. |
*/ |
pte = find_mapping(badvaddr, 0); |
if (!pte) |
goto fail; |
|
/* |
* Refill cannot succeed if the mapping is marked as invalid. |
*/ |
if (!pte->v) |
goto fail; |
|
/* |
* New entry is to be inserted into TLB |
*/ |
cp0_pagemask_write(TLB_PAGE_MASK_16K); |
if ((badvaddr/PAGE_SIZE) % 2 == 0) { |
cp0_entry_lo0_write(*((__u32 *) pte)); |
cp0_entry_lo1_write(0); |
} |
else { |
cp0_entry_lo0_write(0); |
cp0_entry_lo1_write(*((__u32 *) pte)); |
} |
tlbwr(); |
|
spinlock_unlock(&VM->lock); |
return; |
|
fail: |
spinlock_unlock(&VM->lock); |
tlb_refill_fail(pstate); |
} |
|
void tlb_invalid(struct exception_regdump *pstate) |
{ |
tlb_invalid_fail(pstate); |
} |
|
void tlb_modified(struct exception_regdump *pstate) |
{ |
tlb_modified_fail(pstate); |
} |
|
void tlb_refill_fail(struct exception_regdump *pstate) |
{ |
char *symbol = ""; |
char *sym2 = ""; |
|
69,11 → 151,11 |
s = get_symtab_entry(pstate->ra); |
if (s) |
sym2 = s; |
panic("%X: TLB Refill Exception at %X(%s<-%s)\n", cp0_badvaddr_read(), |
pstate->epc, symbol, sym2); |
panic("%X: TLB Refill Exception at %X(%s<-%s)\n", cp0_badvaddr_read(), pstate->epc, symbol, sym2); |
} |
|
void tlb_invalid(struct exception_regdump *pstate) |
|
void tlb_invalid_fail(struct exception_regdump *pstate) |
{ |
char *symbol = ""; |
|
84,7 → 166,7 |
pstate->epc, symbol); |
} |
|
void tlb_modified(struct exception_regdump *pstate) |
void tlb_modified_fail(struct exception_regdump *pstate) |
{ |
char *symbol = ""; |
|
102,8 → 184,6 |
|
pri = cpu_priority_high(); |
|
// asid_bitmap_reset(); |
|
// TODO |
|
cpu_priority_restore(pri); |