OpenE2K/qemu-e2k
13
4
Fork 0
Code Issues 4 Pull Requests Projects 2 Releases Activity

sparc64: implement global translation table entries v1

Browse Source 
- match global tte against any context
- show global tte in MMU dump

v0->v1: added default case to switch statement in demap_tlb
- should fix gcc warning about uninitialized context variable

Signed-off-by: Igor V. Kovalenko <igor.v.kovalenko@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Igor V. Kovalenko 2010-05-04 23:15:41 +04:00 committed by Blue Swirl
parent 788686ec59
commit 299b520cd4
3 changed files with 77 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
target-sparc/cpu.h
View File

@ -513,6 +513,24 @@ static inline void cpu_set_cwp(CPUSPARCState *env1, int new_cwp)
/* sun4m.c, sun4u.c */
void cpu_check_irqs(CPUSPARCState *env);
#if defined (TARGET_SPARC64)
static inline int compare_masked(uint64_t x, uint64_t y, uint64_t mask)
{
return (x & mask) == (y & mask);
}
#define MMU_CONTEXT_BITS 13
#define MMU_CONTEXT_MASK ((1 << MMU_CONTEXT_BITS) - 1)
static inline int tlb_compare_context(const SparcTLBEntry *tlb,
uint64_t context)
{
return compare_masked(context, tlb->tag, MMU_CONTEXT_MASK);
}
#endif
static inline void PUT_PSR(CPUSPARCState *env1, target_ulong val)
{
env1->psr = val & PSR_ICC;

33
target-sparc/helper.c
View File

@ -381,17 +381,11 @@ static inline target_phys_addr_t ultrasparc_truncate_physical(uint64_t x)
* UltraSparc IIi I/DMMUs
*/
static inline int compare_masked(uint64_t x, uint64_t y, uint64_t mask)
{
return (x & mask) == (y & mask);
}
// Returns true if TTE tag is valid and matches virtual address value in context
// requires virtual address mask value calculated from TTE entry size
static inline int ultrasparc_tag_match(SparcTLBEntry *tlb,
uint64_t address, uint64_t context,
target_phys_addr_t *physical,
int is_nucleus)
target_phys_addr_t *physical)
{
uint64_t mask;
@ -413,8 +407,7 @@ static inline int ultrasparc_tag_match(SparcTLBEntry *tlb,
// valid, context match, virtual address match?
if (TTE_IS_VALID(tlb->tte) &&
((is_nucleus && compare_masked(0, tlb->tag, 0x1fff))
|| TTE_IS_GLOBAL(tlb->tte) || compare_masked(context, tlb->tag, 0x1fff))
(TTE_IS_GLOBAL(tlb->tte) || tlb_compare_context(tlb, context))
&& compare_masked(address, tlb->tag, mask))
{
// decode physical address
@ -431,7 +424,6 @@ static int get_physical_address_data(CPUState *env,
{
unsigned int i;
uint64_t context;
int is_nucleus;
if ((env->lsu & DMMU_E) == 0) { /* DMMU disabled */
*physical = ultrasparc_truncate_physical(address);
@ -439,14 +431,16 @@ static int get_physical_address_data(CPUState *env,
return 0;
}
context = env->dmmu.mmu_primary_context & 0x1fff;
is_nucleus = env->tl > 0;
if (env->tl == 0) {
context = env->dmmu.mmu_primary_context & 0x1fff;
} else {
context = 0;
}
for (i = 0; i < 64; i++) {
// ctx match, vaddr match, valid?
if (ultrasparc_tag_match(&env->dtlb[i],
address, context, physical,
is_nucleus)) {
address, context, physical)) {
// access ok?
if (((env->dtlb[i].tte & 0x4) && is_user) ||
(!(env->dtlb[i].tte & 0x2) && (rw == 1))) {
@ -492,7 +486,6 @@ static int get_physical_address_code(CPUState *env,
{
unsigned int i;
uint64_t context;
int is_nucleus;
if ((env->lsu & IMMU_E) == 0 || (env->pstate & PS_RED) != 0) {
/* IMMU disabled */
@ -501,14 +494,16 @@ static int get_physical_address_code(CPUState *env,
return 0;
}
context = env->dmmu.mmu_primary_context & 0x1fff;
is_nucleus = env->tl > 0;
if (env->tl == 0) {
context = env->dmmu.mmu_primary_context & 0x1fff;
} else {
context = 0;
}
for (i = 0; i < 64; i++) {
// ctx match, vaddr match, valid?
if (ultrasparc_tag_match(&env->itlb[i],
address, context, physical,
is_nucleus)) {
address, context, physical)) {
// access ok?
if ((env->itlb[i].tte & 0x4) && is_user) {
if (env->immu.sfsr) /* Fault status register */

55
target-sparc/op_helper.c
View File

@ -129,24 +129,59 @@ static void demap_tlb(SparcTLBEntry *tlb, target_ulong demap_addr,
{
unsigned int i;
target_ulong mask;
uint64_t context;
int is_demap_context = (demap_addr >> 6) & 1;
// demap context
switch ((demap_addr >> 4) & 3) {
case 0: // primary
context = env1->dmmu.mmu_primary_context;
break;
case 1: // secondary
context = env1->dmmu.mmu_secondary_context;
break;
case 2: // nucleus
context = 0;
break;
case 3: // reserved
default:
return;
}
for (i = 0; i < 64; i++) {
if (TTE_IS_VALID(tlb[i].tte)) {
mask = 0xffffffffffffe000ULL;
mask <<= 3 * ((tlb[i].tte >> 61) & 3);
if (is_demap_context) {
// will remove non-global entries matching context value
if (TTE_IS_GLOBAL(tlb[i].tte) ||
!tlb_compare_context(&tlb[i], context)) {
continue;
}
} else {
// demap page
// will remove any entry matching VA
mask = 0xffffffffffffe000ULL;
mask <<= 3 * ((tlb[i].tte >> 61) & 3);
if ((demap_addr & mask) == (tlb[i].tag & mask)) {
replace_tlb_entry(&tlb[i], 0, 0, env1);
#ifdef DEBUG_MMU
DPRINTF_MMU("%s demap invalidated entry [%02u]\n", strmmu, i);
dump_mmu(env1);
#endif
if (!compare_masked(demap_addr, tlb[i].tag, mask)) {
continue;
}
// entry should be global or matching context value
if (!TTE_IS_GLOBAL(tlb[i].tte) &&
!tlb_compare_context(&tlb[i], context)) {
continue;
}
}
//return;
replace_tlb_entry(&tlb[i], 0, 0, env1);
#ifdef DEBUG_MMU
DPRINTF_MMU("%s demap invalidated entry [%02u]\n", strmmu, i);
dump_mmu(env1);
#endif
}
}
}
static void replace_tlb_1bit_lru(SparcTLBEntry *tlb,