diff options
Diffstat (limited to 'src/usf/tlb.c')
| -rw-r--r-- | src/usf/tlb.c | 200 |
1 files changed, 0 insertions, 200 deletions
diff --git a/src/usf/tlb.c b/src/usf/tlb.c deleted file mode 100644 index ab94197..0000000 --- a/src/usf/tlb.c +++ /dev/null @@ -1,200 +0,0 @@ -/*
- * Project 64 - A Nintendo 64 emulator.
- *
- * (c) Copyright 2001 zilmar (zilmar@emulation64.com) and
- * Jabo (jabo@emulation64.com).
- *
- * pj64 homepage: www.pj64.net
- *
- * Permission to use, copy, modify and distribute Project64 in both binary and
- * source form, for non-commercial purposes, is hereby granted without fee,
- * providing that this license information and copyright notice appear with
- * all copies and any derived work.
- *
- * This software is provided 'as-is', without any express or implied
- * warranty. In no event shall the authors be held liable for any damages
- * arising from the use of this software.
- *
- * Project64 is freeware for PERSONAL USE only. Commercial users should
- * seek permission of the copyright holders first. Commercial use includes
- * charging money for Project64 or software derived from Project64.
- *
- * The copyright holders request that bug fixes and improvements to the code
- * should be forwarded to them so if they want them.
- *
- */
-
-#include "main.h"
-#include "cpu.h"
-
-void SetupTLB_Entry (int32_t Entry);
-
-FASTTLB FastTlb[64];
-TLB tlb[32];
-
-uint32_t AddressDefined ( uintptr_t VAddr) {
- uint32_t i;
-
- if (VAddr >= 0x80000000 && VAddr <= 0xBFFFFFFF) {
- return 1;
- }
-
- for (i = 0; i < 64; i++) {
- if (FastTlb[i].ValidEntry == 0) { continue; }
- if (VAddr >= FastTlb[i].VSTART && VAddr <= FastTlb[i].VEND) {
- return 1;
- }
- }
- return 0;
-}
-
-void InitilizeTLB (void) {
- uint32_t count;
-
- for (count = 0; count < 32; count++) { tlb[count].EntryDefined = 0; }
- for (count = 0; count < 64; count++) { FastTlb[count].ValidEntry = 0; }
- SetupTLB();
-}
-
-void SetupTLB (void) {
- uint32_t count;
-
- memset(TLB_Map,0,(0xFFFFF * sizeof(uintptr_t)));
- for (count = 0x80000000; count < 0xC0000000; count += 0x1000) {
- TLB_Map[count >> 12] = ((uintptr_t)N64MEM + (count & 0x1FFFFFFF)) - count;
- }
- for (count = 0; count < 32; count ++) { SetupTLB_Entry(count); }
-}
-/*
-test=(BYTE *) VirtualAlloc( 0x10, 0x70000, MEM_RESERVE, PAGE_EXECUTE_READWRITE);
- if(test == 0) {
- printf("FAIL!\n");
- exit(0);
- }
-*/
-
-void SetupTLB_Entry (int Entry) {
- uint32_t FastIndx;
-
-
- if (!tlb[Entry].EntryDefined) { return; }
- FastIndx = Entry << 1;
- FastTlb[FastIndx].VSTART=tlb[Entry].EntryHi.VPN2 << 13;
- FastTlb[FastIndx].VEND = FastTlb[FastIndx].VSTART + (tlb[Entry].PageMask.Mask << 12) + 0xFFF;
- FastTlb[FastIndx].PHYSSTART = tlb[Entry].EntryLo0.PFN << 12;
- FastTlb[FastIndx].VALID = tlb[Entry].EntryLo0.V;
- FastTlb[FastIndx].DIRTY = tlb[Entry].EntryLo0.D;
- FastTlb[FastIndx].GLOBAL = tlb[Entry].EntryLo0.GLOBAL & tlb[Entry].EntryLo1.GLOBAL;
- FastTlb[FastIndx].ValidEntry = 0;
-
- FastIndx = (Entry << 1) + 1;
- FastTlb[FastIndx].VSTART=(tlb[Entry].EntryHi.VPN2 << 13) + ((tlb[Entry].PageMask.Mask << 12) + 0xFFF + 1);
- FastTlb[FastIndx].VEND = FastTlb[FastIndx].VSTART + (tlb[Entry].PageMask.Mask << 12) + 0xFFF;
- FastTlb[FastIndx].PHYSSTART = tlb[Entry].EntryLo1.PFN << 12;
- FastTlb[FastIndx].VALID = tlb[Entry].EntryLo1.V;
- FastTlb[FastIndx].DIRTY = tlb[Entry].EntryLo1.D;
- FastTlb[FastIndx].GLOBAL = tlb[Entry].EntryLo0.GLOBAL & tlb[Entry].EntryLo1.GLOBAL;
- FastTlb[FastIndx].ValidEntry = 0;
-
- for ( FastIndx = Entry << 1; FastIndx <= (Entry << 1) + 1; FastIndx++) {
- uint32_t count;
-
- if (!FastTlb[FastIndx].VALID) {
- FastTlb[FastIndx].ValidEntry = 1;
- continue;
- }
- if (FastTlb[FastIndx].VEND <= FastTlb[FastIndx].VSTART) {
- continue;
- }
- if (FastTlb[FastIndx].VSTART >= 0x80000000 && FastTlb[FastIndx].VEND <= 0xBFFFFFFF) {
- continue;
- }
- if (FastTlb[FastIndx].PHYSSTART > 0x1FFFFFFF) {
- continue;
- }
-
-
- //exit(0);
- //"c:\music\xsf\usf\pdusf\03 - Carrington Institute.miniusf"
- //"c:\music\xsf\usf\pdusf\03 - Carrington Institute.miniusf"
-
-
- //test if overlap
- FastTlb[FastIndx].ValidEntry = 1;
- for (count = FastTlb[FastIndx].VSTART; count < FastTlb[FastIndx].VEND; count += 0x1000) {
- TLB_Map[count >> 12] = ((uintptr_t)N64MEM + (count - FastTlb[FastIndx].VSTART + FastTlb[FastIndx].PHYSSTART)) - count;
- }
- }
-}
-
-void TLB_Probe (void) {
- uint32_t Counter;
-
-
- INDEX_REGISTER |= 0x80000000;
- for (Counter = 0; Counter < 32; Counter ++) {
- uint32_t TlbValue = tlb[Counter].EntryHi.Value & (~tlb[Counter].PageMask.Mask << 13);
- uint32_t EntryHi = ENTRYHI_REGISTER & (~tlb[Counter].PageMask.Mask << 13);
-
- if (TlbValue == EntryHi) {
- uint32_t Global = (tlb[Counter].EntryHi.Value & 0x100) != 0;
- uint32_t SameAsid = ((tlb[Counter].EntryHi.Value & 0xFF) == (ENTRYHI_REGISTER & 0xFF));
-
- if (Global || SameAsid) {
- INDEX_REGISTER = Counter;
- return;
- }
- }
- }
-}
-
-void TLB_Read (void) {
- uint32_t index = INDEX_REGISTER & 0x1F;
-
- PAGE_MASK_REGISTER = tlb[index].PageMask.Value ;
- ENTRYHI_REGISTER = (tlb[index].EntryHi.Value & ~tlb[index].PageMask.Value) ;
- ENTRYLO0_REGISTER = tlb[index].EntryLo0.Value;
- ENTRYLO1_REGISTER = tlb[index].EntryLo1.Value;
-}
-
-uint32_t TranslateVaddr ( uintptr_t * Addr) {
- if (TLB_Map[((*Addr) & 0xffffffff) >> 12] == 0) { return 0; }
- *Addr = (uintptr_t)((uint8_t *)(TLB_Map[((*Addr) & 0xffffffff) >> 12] + ((*Addr) & 0xffffffff)) - (uintptr_t)N64MEM);
- return 1;
-}
-
-void WriteTLBEntry (int32_t index) {
- uint32_t FastIndx;
-
- FastIndx = index << 1;
- if ((PROGRAM_COUNTER >= FastTlb[FastIndx].VSTART &&
- PROGRAM_COUNTER < FastTlb[FastIndx].VEND &&
- FastTlb[FastIndx].ValidEntry && FastTlb[FastIndx].VALID)
- ||
- (PROGRAM_COUNTER >= FastTlb[FastIndx + 1].VSTART &&
- PROGRAM_COUNTER < FastTlb[FastIndx + 1].VEND &&
- FastTlb[FastIndx + 1].ValidEntry && FastTlb[FastIndx + 1].VALID))
- {
- return;
- }
-
- if (tlb[index].EntryDefined) {
- uint32_t count;
-
- for ( FastIndx = index << 1; FastIndx <= (index << 1) + 1; FastIndx++) {
- if (!FastTlb[FastIndx].ValidEntry) { continue; }
- if (!FastTlb[FastIndx].VALID) { continue; }
- for (count = FastTlb[FastIndx].VSTART; count < FastTlb[FastIndx].VEND; count += 0x1000) {
- TLB_Map[count >> 12] = 0;
- }
- }
- }
- tlb[index].PageMask.Value = PAGE_MASK_REGISTER;
- tlb[index].EntryHi.Value = ENTRYHI_REGISTER;
- tlb[index].EntryLo0.Value = ENTRYLO0_REGISTER;
- tlb[index].EntryLo1.Value = ENTRYLO1_REGISTER;
- tlb[index].EntryDefined = 1;
-
-
- SetupTLB_Entry(index);
-}
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