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