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+/* armvirt.c -- ARMulator virtual memory interace: ARM6 Instruction Emulator.
+ Copyright (C) 1994 Advanced RISC Machines Ltd.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+/* This file contains a complete ARMulator memory model, modelling a
+"virtual memory" system. A much simpler model can be found in armfast.c,
+and that model goes faster too, but has a fixed amount of memory. This
+model's memory has 64K pages, allocated on demand from a 64K entry page
+table. The routines PutWord and GetWord implement this. Pages are never
+freed as they might be needed again. A single area of memory may be
+defined to generate aborts. */
+
+#include "armdefs.h"
+#include "skyeye_defs.h"
+//#include "code_cov.h"
+
+#ifdef VALIDATE /* for running the validate suite */
+#define TUBE 48 * 1024 * 1024 /* write a char on the screen */
+#define ABORTS 1
+#endif
+
+/* #define ABORTS */
+
+#ifdef ABORTS /* the memory system will abort */
+/* For the old test suite Abort between 32 Kbytes and 32 Mbytes
+ For the new test suite Abort between 8 Mbytes and 26 Mbytes */
+/* #define LOWABORT 32 * 1024
+#define HIGHABORT 32 * 1024 * 1024 */
+#define LOWABORT 8 * 1024 * 1024
+#define HIGHABORT 26 * 1024 * 1024
+
+#endif
+
+#define NUMPAGES 64 * 1024
+#define PAGESIZE 64 * 1024
+#define PAGEBITS 16
+#define OFFSETBITS 0xffff
+//chy 2003-08-19: seems no use ????
+int SWI_vector_installed = FALSE;
+extern ARMword skyeye_cachetype;
+
+/***************************************************************************\
+* Get a byte into Virtual Memory, maybe allocating the page *
+\***************************************************************************/
+static fault_t
+GetByte (ARMul_State * state, ARMword address, ARMword * data)
+{
+ fault_t fault;
+
+ fault = mmu_read_byte (state, address, data);
+ if (fault) {
+//chy 2003-07-11: sometime has fault, but linux can continue running !!!!????
+// printf("SKYEYE: GetByte fault %d \n", fault);
+ }
+ return fault;
+}
+
+/***************************************************************************\
+* Get a halfword into Virtual Memory, maybe allocating the page *
+\***************************************************************************/
+static fault_t
+GetHalfWord (ARMul_State * state, ARMword address, ARMword * data)
+{
+ fault_t fault;
+
+ fault = mmu_read_halfword (state, address, data);
+ if (fault) {
+//chy 2003-07-11: sometime has fault, but linux can continue running !!!!????
+// printf("SKYEYE: GetHalfWord fault %d \n", fault);
+ }
+ return fault;
+}
+
+/***************************************************************************\
+* Get a Word from Virtual Memory, maybe allocating the page *
+\***************************************************************************/
+
+static fault_t
+GetWord (ARMul_State * state, ARMword address, ARMword * data)
+{
+ fault_t fault;
+
+ fault = mmu_read_word (state, address, data);
+ if (fault) {
+//chy 2003-07-11: sometime has fault, but linux can continue running !!!!????
+#if 0
+/* XXX */ extern int hack;
+ hack = 1;
+#endif
+#if 0
+ printf ("mmu_read_word at 0x%08x: ", address);
+ switch (fault) {
+ case ALIGNMENT_FAULT:
+ printf ("ALIGNMENT_FAULT");
+ break;
+ case SECTION_TRANSLATION_FAULT:
+ printf ("SECTION_TRANSLATION_FAULT");
+ break;
+ case PAGE_TRANSLATION_FAULT:
+ printf ("PAGE_TRANSLATION_FAULT");
+ break;
+ case SECTION_DOMAIN_FAULT:
+ printf ("SECTION_DOMAIN_FAULT");
+ break;
+ case SECTION_PERMISSION_FAULT:
+ printf ("SECTION_PERMISSION_FAULT");
+ break;
+ case SUBPAGE_PERMISSION_FAULT:
+ printf ("SUBPAGE_PERMISSION_FAULT");
+ break;
+ default:
+ printf ("Unrecognized fault number!");
+ }
+ printf ("\tpc = 0x%08x\n", state->Reg[15]);
+#endif
+ }
+ return fault;
+}
+
+//2003-07-10 chy: lyh change
+/****************************************************************************\
+ * Load a Instrion Word into Virtual Memory *
+\****************************************************************************/
+static fault_t
+LoadInstr (ARMul_State * state, ARMword address, ARMword * instr)
+{
+ fault_t fault;
+ fault = mmu_load_instr (state, address, instr);
+ return fault;
+ //if (fault)
+ // log_msg("load_instr fault = %d, address = %x\n", fault, address);
+}
+
+/***************************************************************************\
+* Put a byte into Virtual Memory, maybe allocating the page *
+\***************************************************************************/
+static fault_t
+PutByte (ARMul_State * state, ARMword address, ARMword data)
+{
+ fault_t fault;
+
+ fault = mmu_write_byte (state, address, data);
+ if (fault) {
+//chy 2003-07-11: sometime has fault, but linux can continue running !!!!????
+// printf("SKYEYE: PutByte fault %d \n", fault);
+ }
+ return fault;
+}
+
+/***************************************************************************\
+* Put a halfword into Virtual Memory, maybe allocating the page *
+\***************************************************************************/
+static fault_t
+PutHalfWord (ARMul_State * state, ARMword address, ARMword data)
+{
+ fault_t fault;
+
+ fault = mmu_write_halfword (state, address, data);
+ if (fault) {
+//chy 2003-07-11: sometime has fault, but linux can continue running !!!!????
+// printf("SKYEYE: PutHalfWord fault %d \n", fault);
+ }
+ return fault;
+}
+
+/***************************************************************************\
+* Put a Word into Virtual Memory, maybe allocating the page *
+\***************************************************************************/
+
+static fault_t
+PutWord (ARMul_State * state, ARMword address, ARMword data)
+{
+ fault_t fault;
+
+ fault = mmu_write_word (state, address, data);
+ if (fault) {
+//chy 2003-07-11: sometime has fault, but linux can continue running !!!!????
+#if 0
+/* XXX */ extern int hack;
+ hack = 1;
+#endif
+#if 0
+ printf ("mmu_write_word at 0x%08x: ", address);
+ switch (fault) {
+ case ALIGNMENT_FAULT:
+ printf ("ALIGNMENT_FAULT");
+ break;
+ case SECTION_TRANSLATION_FAULT:
+ printf ("SECTION_TRANSLATION_FAULT");
+ break;
+ case PAGE_TRANSLATION_FAULT:
+ printf ("PAGE_TRANSLATION_FAULT");
+ break;
+ case SECTION_DOMAIN_FAULT:
+ printf ("SECTION_DOMAIN_FAULT");
+ break;
+ case SECTION_PERMISSION_FAULT:
+ printf ("SECTION_PERMISSION_FAULT");
+ break;
+ case SUBPAGE_PERMISSION_FAULT:
+ printf ("SUBPAGE_PERMISSION_FAULT");
+ break;
+ default:
+ printf ("Unrecognized fault number!");
+ }
+ printf ("\tpc = 0x%08x\n", state->Reg[15]);
+#endif
+ }
+ return fault;
+}
+
+/***************************************************************************\
+* Initialise the memory interface *
+\***************************************************************************/
+
+unsigned
+ARMul_MemoryInit (ARMul_State * state, unsigned int initmemsize)
+{
+ return TRUE;
+}
+
+/***************************************************************************\
+* Remove the memory interface *
+\***************************************************************************/
+
+void
+ARMul_MemoryExit (ARMul_State * state)
+{
+}
+
+/***************************************************************************\
+* ReLoad Instruction *
+\***************************************************************************/
+
+ARMword
+ARMul_ReLoadInstr (ARMul_State * state, ARMword address, ARMword isize)
+{
+ ARMword data;
+ fault_t fault;
+
+#ifdef ABORTS
+ if (address >= LOWABORT && address < HIGHABORT) {
+ ARMul_PREFETCHABORT (address);
+ return ARMul_ABORTWORD;
+ }
+ else {
+ ARMul_CLEARABORT;
+ }
+#endif
+#if 0
+ /* do profiling for code coverage */
+ if (skyeye_config.code_cov.prof_on)
+ cov_prof(EXEC_FLAG, address);
+#endif
+#if 1
+ if ((isize == 2) && (address & 0x2)) {
+ ARMword lo, hi;
+ if (!(skyeye_cachetype == INSTCACHE))
+ fault = GetHalfWord (state, address, &lo);
+ else
+ fault = LoadInstr (state, address, &lo);
+#if 0
+ if (!fault) {
+ if (!(skyeye_cachetype == INSTCACHE))
+ fault = GetHalfWord (state, address + isize, &hi);
+ else
+ fault = LoadInstr (state, address + isize, &hi);
+
+ }
+#endif
+ if (fault) {
+ ARMul_PREFETCHABORT (address);
+ return ARMul_ABORTWORD;
+ }
+ else {
+ ARMul_CLEARABORT;
+ }
+ return lo;
+#if 0
+ if (state->bigendSig == HIGH)
+ return (lo << 16) | (hi >> 16);
+ else
+ return ((hi & 0xFFFF) << 16) | (lo >> 16);
+#endif
+ }
+#endif
+ if (!(skyeye_cachetype == INSTCACHE))
+ fault = GetWord (state, address, &data);
+ else
+ fault = LoadInstr (state, address, &data);
+
+ if (fault) {
+
+ /* dyf add for s3c6410 no instcache temporary 2010.9.17 */
+ if (!(skyeye_cachetype == INSTCACHE)) {
+ /* set translation fault on prefetch abort */
+ state->mmu.fault_statusi = fault & 0xFF;
+ state->mmu.fault_address = address;
+ }
+ /* add end */
+
+ ARMul_PREFETCHABORT (address);
+ return ARMul_ABORTWORD;
+ }
+ else {
+ ARMul_CLEARABORT;
+ }
+
+ return data;
+}
+
+/***************************************************************************\
+* Load Instruction, Sequential Cycle *
+\***************************************************************************/
+
+ARMword
+ARMul_LoadInstrS (ARMul_State * state, ARMword address, ARMword isize)
+{
+ state->NumScycles++;
+
+#ifdef HOURGLASS
+ if ((state->NumScycles & HOURGLASS_RATE) == 0) {
+ HOURGLASS;
+ }
+#endif
+
+ return ARMul_ReLoadInstr (state, address, isize);
+}
+
+/***************************************************************************\
+* Load Instruction, Non Sequential Cycle *
+\***************************************************************************/
+
+ARMword
+ARMul_LoadInstrN (ARMul_State * state, ARMword address, ARMword isize)
+{
+ state->NumNcycles++;
+
+ return ARMul_ReLoadInstr (state, address, isize);
+}
+
+/***************************************************************************\
+* Read Word (but don't tell anyone!) *
+\***************************************************************************/
+
+ARMword
+ARMul_ReadWord (ARMul_State * state, ARMword address)
+{
+ ARMword data;
+ fault_t fault;
+
+#ifdef ABORTS
+ if (address >= LOWABORT && address < HIGHABORT) {
+ ARMul_DATAABORT (address);
+ return ARMul_ABORTWORD;
+ }
+ else {
+ ARMul_CLEARABORT;
+ }
+#endif
+
+ fault = GetWord (state, address, &data);
+ if (fault) {
+ state->mmu.fault_status =
+ (fault | (state->mmu.last_domain << 4)) & 0xFF;
+ state->mmu.fault_address = address;
+ ARMul_DATAABORT (address);
+ return ARMul_ABORTWORD;
+ }
+ else {
+ ARMul_CLEARABORT;
+ }
+ return data;
+}
+
+/***************************************************************************\
+* Load Word, Sequential Cycle *
+\***************************************************************************/
+
+ARMword
+ARMul_LoadWordS (ARMul_State * state, ARMword address)
+{
+ state->NumScycles++;
+
+ return ARMul_ReadWord (state, address);
+}
+
+/***************************************************************************\
+* Load Word, Non Sequential Cycle *
+\***************************************************************************/
+
+ARMword
+ARMul_LoadWordN (ARMul_State * state, ARMword address)
+{
+ state->NumNcycles++;
+
+ return ARMul_ReadWord (state, address);
+}
+
+/***************************************************************************\
+* Load Halfword, (Non Sequential Cycle) *
+\***************************************************************************/
+
+ARMword
+ARMul_LoadHalfWord (ARMul_State * state, ARMword address)
+{
+ ARMword data;
+ fault_t fault;
+
+ state->NumNcycles++;
+ fault = GetHalfWord (state, address, &data);
+
+ if (fault) {
+ state->mmu.fault_status =
+ (fault | (state->mmu.last_domain << 4)) & 0xFF;
+ state->mmu.fault_address = address;
+ ARMul_DATAABORT (address);
+ return ARMul_ABORTWORD;
+ }
+ else {
+ ARMul_CLEARABORT;
+ }
+
+ return data;
+
+}
+
+/***************************************************************************\
+* Read Byte (but don't tell anyone!) *
+\***************************************************************************/
+int ARMul_ICE_ReadByte(ARMul_State * state, ARMword address, ARMword *presult)
+{
+ ARMword data;
+ fault_t fault;
+ fault = GetByte (state, address, &data);
+ if (fault) {
+ *presult=-1; fault=ALIGNMENT_FAULT; return fault;
+ }else{
+ *(char *)presult=(unsigned char)(data & 0xff); fault=NO_FAULT; return fault;
+ }
+}
+
+
+ARMword
+ARMul_ReadByte (ARMul_State * state, ARMword address)
+{
+ ARMword data;
+ fault_t fault;
+
+ fault = GetByte (state, address, &data);
+
+ if (fault) {
+ state->mmu.fault_status =
+ (fault | (state->mmu.last_domain << 4)) & 0xFF;
+ state->mmu.fault_address = address;
+ ARMul_DATAABORT (address);
+ return ARMul_ABORTWORD;
+ }
+ else {
+ ARMul_CLEARABORT;
+ }
+
+ return data;
+
+}
+
+/***************************************************************************\
+* Load Byte, (Non Sequential Cycle) *
+\***************************************************************************/
+
+ARMword
+ARMul_LoadByte (ARMul_State * state, ARMword address)
+{
+ state->NumNcycles++;
+
+ return ARMul_ReadByte (state, address);
+}
+
+/***************************************************************************\
+* Write Word (but don't tell anyone!) *
+\***************************************************************************/
+
+void
+ARMul_WriteWord (ARMul_State * state, ARMword address, ARMword data)
+{
+ fault_t fault;
+
+#ifdef ABORTS
+ if (address >= LOWABORT && address < HIGHABORT) {
+ ARMul_DATAABORT (address);
+ return;
+ }
+ else {
+ ARMul_CLEARABORT;
+ }
+#endif
+
+ fault = PutWord (state, address, data);
+ if (fault) {
+ state->mmu.fault_status =
+ (fault | (state->mmu.last_domain << 4)) & 0xFF;
+ state->mmu.fault_address = address;
+ ARMul_DATAABORT (address);
+ return;
+ }
+ else {
+ ARMul_CLEARABORT;
+ }
+}
+
+/***************************************************************************\
+* Store Word, Sequential Cycle *
+\***************************************************************************/
+
+void
+ARMul_StoreWordS (ARMul_State * state, ARMword address, ARMword data)
+{
+ state->NumScycles++;
+
+ ARMul_WriteWord (state, address, data);
+}
+
+/***************************************************************************\
+* Store Word, Non Sequential Cycle *
+\***************************************************************************/
+
+void
+ARMul_StoreWordN (ARMul_State * state, ARMword address, ARMword data)
+{
+ state->NumNcycles++;
+
+ ARMul_WriteWord (state, address, data);
+}
+
+/***************************************************************************\
+* Store HalfWord, (Non Sequential Cycle) *
+\***************************************************************************/
+
+void
+ARMul_StoreHalfWord (ARMul_State * state, ARMword address, ARMword data)
+{
+ fault_t fault;
+ state->NumNcycles++;
+ fault = PutHalfWord (state, address, data);
+ if (fault) {
+ state->mmu.fault_status =
+ (fault | (state->mmu.last_domain << 4)) & 0xFF;
+ state->mmu.fault_address = address;
+ ARMul_DATAABORT (address);
+ return;
+ }
+ else {
+ ARMul_CLEARABORT;
+ }
+}
+
+//chy 2006-04-15
+int ARMul_ICE_WriteByte (ARMul_State * state, ARMword address, ARMword data)
+{
+ fault_t fault;
+ fault = PutByte (state, address, data);
+ if (fault)
+ return 1;
+ else
+ return 0;
+}
+/***************************************************************************\
+* Write Byte (but don't tell anyone!) *
+\***************************************************************************/
+//chy 2003-07-10, add real write byte fun
+void
+ARMul_WriteByte (ARMul_State * state, ARMword address, ARMword data)
+{
+ fault_t fault;
+ fault = PutByte (state, address, data);
+ if (fault) {
+ state->mmu.fault_status =
+ (fault | (state->mmu.last_domain << 4)) & 0xFF;
+ state->mmu.fault_address = address;
+ ARMul_DATAABORT (address);
+ return;
+ }
+ else {
+ ARMul_CLEARABORT;
+ }
+}
+
+/***************************************************************************\
+* Store Byte, (Non Sequential Cycle) *
+\***************************************************************************/
+
+void
+ARMul_StoreByte (ARMul_State * state, ARMword address, ARMword data)
+{
+ state->NumNcycles++;
+
+#ifdef VALIDATE
+ if (address == TUBE) {
+ if (data == 4)
+ state->Emulate = FALSE;
+ else
+ (void) putc ((char) data, stderr); /* Write Char */
+ return;
+ }
+#endif
+
+ ARMul_WriteByte (state, address, data);
+}
+
+/***************************************************************************\
+* Swap Word, (Two Non Sequential Cycles) *
+\***************************************************************************/
+
+ARMword
+ARMul_SwapWord (ARMul_State * state, ARMword address, ARMword data)
+{
+ ARMword temp;
+
+ state->NumNcycles++;
+
+ temp = ARMul_ReadWord (state, address);
+
+ state->NumNcycles++;
+
+ PutWord (state, address, data);
+
+ return temp;
+}
+
+/***************************************************************************\
+* Swap Byte, (Two Non Sequential Cycles) *
+\***************************************************************************/
+
+ARMword
+ARMul_SwapByte (ARMul_State * state, ARMword address, ARMword data)
+{
+ ARMword temp;
+
+ temp = ARMul_LoadByte (state, address);
+ ARMul_StoreByte (state, address, data);
+
+ return temp;
+}
+
+/***************************************************************************\
+* Count I Cycles *
+\***************************************************************************/
+
+void
+ARMul_Icycles (ARMul_State * state, unsigned number,
+ ARMword address)
+{
+ state->NumIcycles += number;
+ ARMul_CLEARABORT;
+}
+
+/***************************************************************************\
+* Count C Cycles *
+\***************************************************************************/
+
+void
+ARMul_Ccycles (ARMul_State * state, unsigned number,
+ ARMword address)
+{
+ state->NumCcycles += number;
+ ARMul_CLEARABORT;
+}