| Line 17... |
Line 17... |
along with this program; if not, write to the Free Software
|
along with this program; if not, write to the Free Software
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|
|
/* IMMU model (not functional yet, currently just copy of data cache). */
|
/* IMMU model (not functional yet, currently just copy of data cache). */
|
|
|
|
#include "config.h"
|
|
|
|
#ifdef HAVE_INTTYPES_H
|
|
#include <inttypes.h>
|
|
#endif
|
|
|
|
#include "port.h"
|
|
#include "arch.h"
|
#include "immu.h"
|
#include "immu.h"
|
#include "abstract.h"
|
#include "abstract.h"
|
#include "opcode/or32.h"
|
#include "opcode/or32.h"
|
#include "stats.h"
|
#include "stats.h"
|
#include "sprs.h"
|
#include "sprs.h"
|
| Line 30... |
Line 38... |
|
|
extern int cont_run;
|
extern int cont_run;
|
|
|
/* Insn MMU */
|
/* Insn MMU */
|
|
|
static inline unsigned long immu_simulate_tlb(unsigned long virtaddr)
|
static inline oraddr_t immu_simulate_tlb(oraddr_t virtaddr)
|
{
|
{
|
int set, way = -1;
|
int set, way = -1;
|
int i;
|
int i;
|
unsigned long tagaddr;
|
oraddr_t tagaddr;
|
unsigned long vpn, ppn;
|
oraddr_t vpn, ppn;
|
|
|
if (!(mfspr(SPR_SR) & SPR_SR_IME) || !(testsprbits(SPR_UPR, SPR_UPR_IMP))) {
|
if (!(mfspr(SPR_SR) & SPR_SR_IME) || !(testsprbits(SPR_UPR, SPR_UPR_IMP))) {
|
insn_ci = (virtaddr >= 0x80000000);
|
insn_ci = (virtaddr >= 0x80000000);
|
return virtaddr;
|
return virtaddr;
|
}
|
}
|
| Line 56... |
Line 64... |
way = i;
|
way = i;
|
|
|
/* Did we find our tlb entry? */
|
/* Did we find our tlb entry? */
|
if (way >= 0) { /* Yes, we did. */
|
if (way >= 0) { /* Yes, we did. */
|
immu_stats.fetch_tlbhit++;
|
immu_stats.fetch_tlbhit++;
|
debug(5, "ITLB hit (virtaddr=%x).\n", virtaddr);
|
debug(5, "ITLB hit (virtaddr=%"PRIxADDR").\n", virtaddr);
|
|
|
/* Test for page fault */
|
/* Test for page fault */
|
if (mfspr (SPR_SR) & SPR_SR_SM) {
|
if (mfspr (SPR_SR) & SPR_SR_SM) {
|
if (!(mfspr (SPR_ITLBTR_BASE(way) + set) & SPR_ITLBTR_SXE))
|
if (!(mfspr (SPR_ITLBTR_BASE(way) + set) & SPR_ITLBTR_SXE))
|
except_handle(EXCEPT_IPF, virtaddr);
|
except_handle(EXCEPT_IPF, virtaddr);
|
| Line 113... |
Line 121... |
*
|
*
|
* RTRN: 0 - no IMMU, IMMU disabled or ITLB miss
|
* RTRN: 0 - no IMMU, IMMU disabled or ITLB miss
|
* else - appropriate PA (note it IMMU is not present
|
* else - appropriate PA (note it IMMU is not present
|
* PA === EA)
|
* PA === EA)
|
*/
|
*/
|
unsigned long peek_into_itlb(unsigned long virtaddr)
|
oraddr_t peek_into_itlb(oraddr_t virtaddr)
|
{
|
{
|
int set, way = -1;
|
int set, way = -1;
|
int i;
|
int i;
|
unsigned long tagaddr;
|
oraddr_t tagaddr;
|
unsigned long vpn, ppn;
|
oraddr_t vpn, ppn;
|
|
|
if (!(mfspr(SPR_SR) & SPR_SR_IME) || !(testsprbits(SPR_UPR, SPR_UPR_IMP))) {
|
if (!(mfspr(SPR_SR) & SPR_SR_IME) || !(testsprbits(SPR_UPR, SPR_UPR_IMP))) {
|
return(virtaddr);
|
return(virtaddr);
|
}
|
}
|
|
|
| Line 163... |
Line 171... |
PRINTF("ERR, should never have happened\n");
|
PRINTF("ERR, should never have happened\n");
|
return(0);
|
return(0);
|
}
|
}
|
|
|
|
|
unsigned long immu_translate(unsigned long virtaddr)
|
oraddr_t immu_translate(oraddr_t virtaddr)
|
{
|
{
|
unsigned long phyaddr = immu_simulate_tlb(virtaddr);
|
oraddr_t phyaddr = immu_simulate_tlb(virtaddr);
|
|
|
/* PRINTF("IMMU translate(%x) = %x\n", virtaddr, phyaddr);*/
|
/* PRINTF("IMMU translate(%x) = %x\n", virtaddr, phyaddr);*/
|
return phyaddr;
|
return phyaddr;
|
}
|
}
|
|
|
