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Ignore whitespace Rev 390 → Rev 391

/SPARTAN/trunk/arch/mips32/src/mm/tlb.c
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);