qemu/target-ppc/helper.c
bellard 2be0071f22 simplified PowerPC exception handling (Jocelyn Mayer)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1492 c046a42c-6fe2-441c-8c8c-71466251a162
2005-07-02 22:09:27 +00:00

1504 lines
45 KiB
C

/*
* PowerPC emulation helpers for qemu.
*
* Copyright (c) 2003-2005 Jocelyn Mayer
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "exec.h"
//#define DEBUG_MMU
//#define DEBUG_BATS
//#define DEBUG_EXCEPTIONS
/*****************************************************************************/
/* PowerPC MMU emulation */
/* Perform BAT hit & translation */
static int get_bat (CPUState *env, uint32_t *real, int *prot,
uint32_t virtual, int rw, int type)
{
uint32_t *BATlt, *BATut, *BATu, *BATl;
uint32_t base, BEPIl, BEPIu, bl;
int i;
int ret = -1;
#if defined (DEBUG_BATS)
if (loglevel > 0) {
fprintf(logfile, "%s: %cBAT v 0x%08x\n", __func__,
type == ACCESS_CODE ? 'I' : 'D', virtual);
}
#endif
switch (type) {
case ACCESS_CODE:
BATlt = env->IBAT[1];
BATut = env->IBAT[0];
break;
default:
BATlt = env->DBAT[1];
BATut = env->DBAT[0];
break;
}
#if defined (DEBUG_BATS)
if (loglevel > 0) {
fprintf(logfile, "%s...: %cBAT v 0x%08x\n", __func__,
type == ACCESS_CODE ? 'I' : 'D', virtual);
}
#endif
base = virtual & 0xFFFC0000;
for (i = 0; i < 4; i++) {
BATu = &BATut[i];
BATl = &BATlt[i];
BEPIu = *BATu & 0xF0000000;
BEPIl = *BATu & 0x0FFE0000;
bl = (*BATu & 0x00001FFC) << 15;
#if defined (DEBUG_BATS)
if (loglevel > 0) {
fprintf(logfile, "%s: %cBAT%d v 0x%08x BATu 0x%08x BATl 0x%08x\n",
__func__, type == ACCESS_CODE ? 'I' : 'D', i, virtual,
*BATu, *BATl);
}
#endif
if ((virtual & 0xF0000000) == BEPIu &&
((virtual & 0x0FFE0000) & ~bl) == BEPIl) {
/* BAT matches */
if ((msr_pr == 0 && (*BATu & 0x00000002)) ||
(msr_pr == 1 && (*BATu & 0x00000001))) {
/* Get physical address */
*real = (*BATl & 0xF0000000) |
((virtual & 0x0FFE0000 & bl) | (*BATl & 0x0FFE0000)) |
(virtual & 0x0001F000);
if (*BATl & 0x00000001)
*prot = PAGE_READ;
if (*BATl & 0x00000002)
*prot = PAGE_WRITE | PAGE_READ;
#if defined (DEBUG_BATS)
if (loglevel > 0) {
fprintf(logfile, "BAT %d match: r 0x%08x prot=%c%c\n",
i, *real, *prot & PAGE_READ ? 'R' : '-',
*prot & PAGE_WRITE ? 'W' : '-');
}
#endif
ret = 0;
break;
}
}
}
if (ret < 0) {
#if defined (DEBUG_BATS)
printf("no BAT match for 0x%08x:\n", virtual);
for (i = 0; i < 4; i++) {
BATu = &BATut[i];
BATl = &BATlt[i];
BEPIu = *BATu & 0xF0000000;
BEPIl = *BATu & 0x0FFE0000;
bl = (*BATu & 0x00001FFC) << 15;
printf("%s: %cBAT%d v 0x%08x BATu 0x%08x BATl 0x%08x \n\t"
"0x%08x 0x%08x 0x%08x\n",
__func__, type == ACCESS_CODE ? 'I' : 'D', i, virtual,
*BATu, *BATl, BEPIu, BEPIl, bl);
}
#endif
}
/* No hit */
return ret;
}
/* PTE table lookup */
static int find_pte (uint32_t *RPN, int *prot, uint32_t base, uint32_t va,
int h, int key, int rw)
{
uint32_t pte0, pte1, keep = 0, access = 0;
int i, good = -1, store = 0;
int ret = -1; /* No entry found */
for (i = 0; i < 8; i++) {
pte0 = ldl_phys(base + (i * 8));
pte1 = ldl_phys(base + (i * 8) + 4);
#if defined (DEBUG_MMU)
if (loglevel > 0) {
fprintf(logfile, "Load pte from 0x%08x => 0x%08x 0x%08x "
"%d %d %d 0x%08x\n", base + (i * 8), pte0, pte1,
pte0 >> 31, h, (pte0 >> 6) & 1, va);
}
#endif
/* Check validity and table match */
if (pte0 & 0x80000000 && (h == ((pte0 >> 6) & 1))) {
/* Check vsid & api */
if ((pte0 & 0x7FFFFFBF) == va) {
if (good == -1) {
good = i;
keep = pte1;
} else {
/* All matches should have equal RPN, WIMG & PP */
if ((keep & 0xFFFFF07B) != (pte1 & 0xFFFFF07B)) {
if (loglevel > 0)
fprintf(logfile, "Bad RPN/WIMG/PP\n");
return -1;
}
}
/* Check access rights */
if (key == 0) {
access = PAGE_READ;
if ((pte1 & 0x00000003) != 0x3)
access |= PAGE_WRITE;
} else {
switch (pte1 & 0x00000003) {
case 0x0:
access = 0;
break;
case 0x1:
case 0x3:
access = PAGE_READ;
break;
case 0x2:
access = PAGE_READ | PAGE_WRITE;
break;
}
}
if (ret < 0) {
if ((rw == 0 && (access & PAGE_READ)) ||
(rw == 1 && (access & PAGE_WRITE))) {
#if defined (DEBUG_MMU)
if (loglevel > 0)
fprintf(logfile, "PTE access granted !\n");
#endif
good = i;
keep = pte1;
ret = 0;
} else {
/* Access right violation */
ret = -2;
#if defined (DEBUG_MMU)
if (loglevel > 0)
fprintf(logfile, "PTE access rejected\n");
#endif
}
*prot = access;
}
}
}
}
if (good != -1) {
*RPN = keep & 0xFFFFF000;
#if defined (DEBUG_MMU)
if (loglevel > 0) {
fprintf(logfile, "found PTE at addr 0x%08x prot=0x%01x ret=%d\n",
*RPN, *prot, ret);
}
#endif
/* Update page flags */
if (!(keep & 0x00000100)) {
/* Access flag */
keep |= 0x00000100;
store = 1;
}
if (!(keep & 0x00000080)) {
if (rw && ret == 0) {
/* Change flag */
keep |= 0x00000080;
store = 1;
} else {
/* Force page fault for first write access */
*prot &= ~PAGE_WRITE;
}
}
if (store) {
stl_phys_notdirty(base + (good * 8) + 4, keep);
}
}
return ret;
}
static inline uint32_t get_pgaddr (uint32_t sdr1, uint32_t hash, uint32_t mask)
{
return (sdr1 & 0xFFFF0000) | (hash & mask);
}
/* Perform segment based translation */
static int get_segment (CPUState *env, uint32_t *real, int *prot,
uint32_t virtual, int rw, int type)
{
uint32_t pg_addr, sdr, ptem, vsid, pgidx;
uint32_t hash, mask;
uint32_t sr;
int key;
int ret = -1, ret2;
sr = env->sr[virtual >> 28];
#if defined (DEBUG_MMU)
if (loglevel > 0) {
fprintf(logfile, "Check segment v=0x%08x %d 0x%08x nip=0x%08x "
"lr=0x%08x ir=%d dr=%d pr=%d %d t=%d\n",
virtual, virtual >> 28, sr, env->nip,
env->lr, msr_ir, msr_dr, msr_pr, rw, type);
}
#endif
key = (((sr & 0x20000000) && msr_pr == 1) ||
((sr & 0x40000000) && msr_pr == 0)) ? 1 : 0;
if ((sr & 0x80000000) == 0) {
#if defined (DEBUG_MMU)
if (loglevel > 0)
fprintf(logfile, "pte segment: key=%d n=0x%08x\n",
key, sr & 0x10000000);
#endif
/* Check if instruction fetch is allowed, if needed */
if (type != ACCESS_CODE || (sr & 0x10000000) == 0) {
/* Page address translation */
vsid = sr & 0x00FFFFFF;
pgidx = (virtual >> 12) & 0xFFFF;
sdr = env->sdr1;
hash = ((vsid ^ pgidx) & 0x0007FFFF) << 6;
mask = ((sdr & 0x000001FF) << 16) | 0xFFC0;
pg_addr = get_pgaddr(sdr, hash, mask);
ptem = (vsid << 7) | (pgidx >> 10);
#if defined (DEBUG_MMU)
if (loglevel > 0) {
fprintf(logfile, "0 sdr1=0x%08x vsid=0x%06x api=0x%04x "
"hash=0x%07x pg_addr=0x%08x\n", sdr, vsid, pgidx, hash,
pg_addr);
}
#endif
/* Primary table lookup */
ret = find_pte(real, prot, pg_addr, ptem, 0, key, rw);
if (ret < 0) {
/* Secondary table lookup */
hash = (~hash) & 0x01FFFFC0;
pg_addr = get_pgaddr(sdr, hash, mask);
#if defined (DEBUG_MMU)
if (virtual != 0xEFFFFFFF && loglevel > 0) {
fprintf(logfile, "1 sdr1=0x%08x vsid=0x%06x api=0x%04x "
"hash=0x%05x pg_addr=0x%08x\n", sdr, vsid, pgidx,
hash, pg_addr);
}
#endif
ret2 = find_pte(real, prot, pg_addr, ptem, 1, key, rw);
if (ret2 != -1)
ret = ret2;
}
} else {
#if defined (DEBUG_MMU)
if (loglevel > 0)
fprintf(logfile, "No access allowed\n");
#endif
ret = -3;
}
} else {
#if defined (DEBUG_MMU)
if (loglevel > 0)
fprintf(logfile, "direct store...\n");
#endif
/* Direct-store segment : absolutely *BUGGY* for now */
switch (type) {
case ACCESS_INT:
/* Integer load/store : only access allowed */
break;
case ACCESS_CODE:
/* No code fetch is allowed in direct-store areas */
return -4;
case ACCESS_FLOAT:
/* Floating point load/store */
return -4;
case ACCESS_RES:
/* lwarx, ldarx or srwcx. */
return -4;
case ACCESS_CACHE:
/* dcba, dcbt, dcbtst, dcbf, dcbi, dcbst, dcbz, or icbi */
/* Should make the instruction do no-op.
* As it already do no-op, it's quite easy :-)
*/
*real = virtual;
return 0;
case ACCESS_EXT:
/* eciwx or ecowx */
return -4;
default:
if (logfile) {
fprintf(logfile, "ERROR: instruction should not need "
"address translation\n");
}
printf("ERROR: instruction should not need "
"address translation\n");
return -4;
}
if ((rw == 1 || key != 1) && (rw == 0 || key != 0)) {
*real = virtual;
ret = 2;
} else {
ret = -2;
}
}
return ret;
}
int get_physical_address (CPUState *env, uint32_t *physical, int *prot,
uint32_t address, int rw, int access_type)
{
int ret;
#if 0
if (loglevel > 0) {
fprintf(logfile, "%s\n", __func__);
}
#endif
if ((access_type == ACCESS_CODE && msr_ir == 0) ||
(access_type != ACCESS_CODE && msr_dr == 0)) {
/* No address translation */
*physical = address & ~0xFFF;
*prot = PAGE_READ | PAGE_WRITE;
ret = 0;
} else {
/* Try to find a BAT */
ret = get_bat(env, physical, prot, address, rw, access_type);
if (ret < 0) {
/* We didn't match any BAT entry */
ret = get_segment(env, physical, prot, address, rw, access_type);
}
}
#if 0
if (loglevel > 0) {
fprintf(logfile, "%s address %08x => %08x\n",
__func__, address, *physical);
}
#endif
return ret;
}
#if defined(CONFIG_USER_ONLY)
target_ulong cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
{
return addr;
}
#else
target_ulong cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
{
uint32_t phys_addr;
int prot;
if (get_physical_address(env, &phys_addr, &prot, addr, 0, ACCESS_INT) != 0)
return -1;
return phys_addr;
}
#endif
#if !defined(CONFIG_USER_ONLY)
#define MMUSUFFIX _mmu
#define GETPC() (__builtin_return_address(0))
#define SHIFT 0
#include "softmmu_template.h"
#define SHIFT 1
#include "softmmu_template.h"
#define SHIFT 2
#include "softmmu_template.h"
#define SHIFT 3
#include "softmmu_template.h"
/* try to fill the TLB and return an exception if error. If retaddr is
NULL, it means that the function was called in C code (i.e. not
from generated code or from helper.c) */
/* XXX: fix it to restore all registers */
void tlb_fill(target_ulong addr, int is_write, int is_user, void *retaddr)
{
TranslationBlock *tb;
CPUState *saved_env;
unsigned long pc;
int ret;
/* XXX: hack to restore env in all cases, even if not called from
generated code */
saved_env = env;
env = cpu_single_env;
#if 0
{
unsigned long tlb_addrr, tlb_addrw;
int index;
index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
tlb_addrr = env->tlb_read[is_user][index].address;
tlb_addrw = env->tlb_write[is_user][index].address;
if (loglevel) {
fprintf(logfile,
"%s 1 %p %p idx=%d addr=0x%08lx tbl_addr=0x%08lx 0x%08lx "
"(0x%08lx 0x%08lx)\n", __func__, env,
&env->tlb_read[is_user][index], index, addr,
tlb_addrr, tlb_addrw, addr & TARGET_PAGE_MASK,
tlb_addrr & (TARGET_PAGE_MASK | TLB_INVALID_MASK));
}
}
#endif
ret = cpu_ppc_handle_mmu_fault(env, addr, is_write, is_user, 1);
if (ret) {
if (retaddr) {
/* now we have a real cpu fault */
pc = (unsigned long)retaddr;
tb = tb_find_pc(pc);
if (tb) {
/* the PC is inside the translated code. It means that we have
a virtual CPU fault */
cpu_restore_state(tb, env, pc, NULL);
}
}
do_raise_exception_err(env->exception_index, env->error_code);
}
#if 0
{
unsigned long tlb_addrr, tlb_addrw;
int index;
index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
tlb_addrr = env->tlb_read[is_user][index].address;
tlb_addrw = env->tlb_write[is_user][index].address;
printf("%s 2 %p %p idx=%d addr=0x%08lx tbl_addr=0x%08lx 0x%08lx "
"(0x%08lx 0x%08lx)\n", __func__, env,
&env->tlb_read[is_user][index], index, addr,
tlb_addrr, tlb_addrw, addr & TARGET_PAGE_MASK,
tlb_addrr & (TARGET_PAGE_MASK | TLB_INVALID_MASK));
}
#endif
env = saved_env;
}
void cpu_ppc_init_mmu(CPUState *env)
{
/* Nothing to do: all translation are disabled */
}
#endif
/* Perform address translation */
int cpu_ppc_handle_mmu_fault (CPUState *env, uint32_t address, int rw,
int is_user, int is_softmmu)
{
uint32_t physical;
int prot;
int exception = 0, error_code = 0;
int access_type;
int ret = 0;
if (rw == 2) {
/* code access */
rw = 0;
access_type = ACCESS_CODE;
} else {
/* data access */
/* XXX: put correct access by using cpu_restore_state()
correctly */
access_type = ACCESS_INT;
// access_type = env->access_type;
}
if (env->user_mode_only) {
/* user mode only emulation */
ret = -2;
goto do_fault;
}
ret = get_physical_address(env, &physical, &prot,
address, rw, access_type);
if (ret == 0) {
ret = tlb_set_page(env, address & ~0xFFF, physical, prot,
is_user, is_softmmu);
} else if (ret < 0) {
do_fault:
#if defined (DEBUG_MMU)
if (loglevel > 0)
cpu_dump_state(env, logfile, fprintf, 0);
#endif
if (access_type == ACCESS_CODE) {
exception = EXCP_ISI;
switch (ret) {
case -1:
/* No matches in page tables */
error_code = 0x40000000;
break;
case -2:
/* Access rights violation */
error_code = 0x08000000;
break;
case -3:
/* No execute protection violation */
error_code = 0x10000000;
break;
case -4:
/* Direct store exception */
/* No code fetch is allowed in direct-store areas */
error_code = 0x10000000;
break;
case -5:
/* No match in segment table */
exception = EXCP_ISEG;
error_code = 0;
break;
}
} else {
exception = EXCP_DSI;
switch (ret) {
case -1:
/* No matches in page tables */
error_code = 0x40000000;
break;
case -2:
/* Access rights violation */
error_code = 0x08000000;
break;
case -4:
/* Direct store exception */
switch (access_type) {
case ACCESS_FLOAT:
/* Floating point load/store */
exception = EXCP_ALIGN;
error_code = EXCP_ALIGN_FP;
break;
case ACCESS_RES:
/* lwarx, ldarx or srwcx. */
error_code = 0x04000000;
break;
case ACCESS_EXT:
/* eciwx or ecowx */
error_code = 0x04100000;
break;
default:
printf("DSI: invalid exception (%d)\n", ret);
exception = EXCP_PROGRAM;
error_code = EXCP_INVAL | EXCP_INVAL_INVAL;
break;
}
case -5:
/* No match in segment table */
exception = EXCP_DSEG;
error_code = 0;
break;
}
if (rw)
error_code |= 0x02000000;
/* Store fault address */
env->spr[SPR_DAR] = address;
env->spr[SPR_DSISR] = error_code;
}
#if 0
printf("%s: set exception to %d %02x\n",
__func__, exception, error_code);
#endif
env->exception_index = exception;
env->error_code = error_code;
ret = 1;
}
return ret;
}
/*****************************************************************************/
/* BATs management */
#if !defined(FLUSH_ALL_TLBS)
static inline void do_invalidate_BAT (CPUPPCState *env,
target_ulong BATu, target_ulong mask)
{
target_ulong base, end, page;
base = BATu & ~0x0001FFFF;
end = base + mask + 0x00020000;
#if defined (DEBUG_BATS)
if (loglevel != 0)
fprintf(logfile, "Flush BAT from %08x to %08x (%08x)\n", base, end, mask);
#endif
for (page = base; page != end; page += TARGET_PAGE_SIZE)
tlb_flush_page(env, page);
#if defined (DEBUG_BATS)
if (loglevel != 0)
fprintf(logfile, "Flush done\n");
#endif
}
#endif
static inline void dump_store_bat (CPUPPCState *env, char ID, int ul, int nr,
target_ulong value)
{
#if defined (DEBUG_BATS)
if (loglevel != 0) {
fprintf(logfile, "Set %cBAT%d%c to 0x%08lx (0x%08lx)\n",
ID, nr, ul == 0 ? 'u' : 'l', (unsigned long)value,
(unsigned long)env->nip);
}
#endif
}
target_ulong do_load_ibatu (CPUPPCState *env, int nr)
{
return env->IBAT[0][nr];
}
target_ulong do_load_ibatl (CPUPPCState *env, int nr)
{
return env->IBAT[1][nr];
}
void do_store_ibatu (CPUPPCState *env, int nr, target_ulong value)
{
target_ulong mask;
dump_store_bat(env, 'I', 0, nr, value);
if (env->IBAT[0][nr] != value) {
mask = (value << 15) & 0x0FFE0000UL;
#if !defined(FLUSH_ALL_TLBS)
do_invalidate_BAT(env, env->IBAT[0][nr], mask);
#endif
/* When storing valid upper BAT, mask BEPI and BRPN
* and invalidate all TLBs covered by this BAT
*/
mask = (value << 15) & 0x0FFE0000UL;
env->IBAT[0][nr] = (value & 0x00001FFFUL) |
(value & ~0x0001FFFFUL & ~mask);
env->IBAT[1][nr] = (env->IBAT[1][nr] & 0x0000007B) |
(env->IBAT[1][nr] & ~0x0001FFFF & ~mask);
#if !defined(FLUSH_ALL_TLBS)
do_invalidate_BAT(env, env->IBAT[0][nr], mask);
#endif
#if defined(FLUSH_ALL_TLBS)
tlb_flush(env, 1);
#endif
}
}
void do_store_ibatl (CPUPPCState *env, int nr, target_ulong value)
{
dump_store_bat(env, 'I', 1, nr, value);
env->IBAT[1][nr] = value;
}
target_ulong do_load_dbatu (CPUPPCState *env, int nr)
{
return env->DBAT[0][nr];
}
target_ulong do_load_dbatl (CPUPPCState *env, int nr)
{
return env->DBAT[1][nr];
}
void do_store_dbatu (CPUPPCState *env, int nr, target_ulong value)
{
target_ulong mask;
dump_store_bat(env, 'D', 0, nr, value);
if (env->DBAT[0][nr] != value) {
/* When storing valid upper BAT, mask BEPI and BRPN
* and invalidate all TLBs covered by this BAT
*/
mask = (value << 15) & 0x0FFE0000UL;
#if !defined(FLUSH_ALL_TLBS)
do_invalidate_BAT(env, env->DBAT[0][nr], mask);
#endif
mask = (value << 15) & 0x0FFE0000UL;
env->DBAT[0][nr] = (value & 0x00001FFFUL) |
(value & ~0x0001FFFFUL & ~mask);
env->DBAT[1][nr] = (env->DBAT[1][nr] & 0x0000007B) |
(env->DBAT[1][nr] & ~0x0001FFFF & ~mask);
#if !defined(FLUSH_ALL_TLBS)
do_invalidate_BAT(env, env->DBAT[0][nr], mask);
#else
tlb_flush(env, 1);
#endif
}
}
void do_store_dbatl (CPUPPCState *env, int nr, target_ulong value)
{
dump_store_bat(env, 'D', 1, nr, value);
env->DBAT[1][nr] = value;
}
static inline void invalidate_all_tlbs (CPUPPCState *env)
{
/* XXX: this needs to be completed for sotware driven TLB support */
tlb_flush(env, 1);
}
/*****************************************************************************/
/* Special registers manipulation */
target_ulong do_load_nip (CPUPPCState *env)
{
return env->nip;
}
void do_store_nip (CPUPPCState *env, target_ulong value)
{
env->nip = value;
}
target_ulong do_load_sdr1 (CPUPPCState *env)
{
return env->sdr1;
}
void do_store_sdr1 (CPUPPCState *env, target_ulong value)
{
#if defined (DEBUG_MMU)
if (loglevel != 0) {
fprintf(logfile, "%s: 0x%08lx\n", __func__, (unsigned long)value);
}
#endif
if (env->sdr1 != value) {
env->sdr1 = value;
invalidate_all_tlbs(env);
}
}
target_ulong do_load_sr (CPUPPCState *env, int srnum)
{
return env->sr[srnum];
}
void do_store_sr (CPUPPCState *env, int srnum, target_ulong value)
{
#if defined (DEBUG_MMU)
if (loglevel != 0) {
fprintf(logfile, "%s: reg=%d 0x%08lx %08lx\n",
__func__, srnum, (unsigned long)value, env->sr[srnum]);
}
#endif
if (env->sr[srnum] != value) {
env->sr[srnum] = value;
#if !defined(FLUSH_ALL_TLBS) && 0
{
target_ulong page, end;
/* Invalidate 256 MB of virtual memory */
page = (16 << 20) * srnum;
end = page + (16 << 20);
for (; page != end; page += TARGET_PAGE_SIZE)
tlb_flush_page(env, page);
}
#else
invalidate_all_tlbs(env);
#endif
}
}
uint32_t do_load_cr (CPUPPCState *env)
{
return (env->crf[0] << 28) |
(env->crf[1] << 24) |
(env->crf[2] << 20) |
(env->crf[3] << 16) |
(env->crf[4] << 12) |
(env->crf[5] << 8) |
(env->crf[6] << 4) |
(env->crf[7] << 0);
}
void do_store_cr (CPUPPCState *env, uint32_t value, uint32_t mask)
{
int i, sh;
for (i = 0, sh = 7; i < 8; i++, sh --) {
if (mask & (1 << sh))
env->crf[i] = (value >> (sh * 4)) & 0xFUL;
}
}
uint32_t do_load_xer (CPUPPCState *env)
{
return (xer_so << XER_SO) |
(xer_ov << XER_OV) |
(xer_ca << XER_CA) |
(xer_bc << XER_BC) |
(xer_cmp << XER_CMP);
}
void do_store_xer (CPUPPCState *env, uint32_t value)
{
xer_so = (value >> XER_SO) & 0x01;
xer_ov = (value >> XER_OV) & 0x01;
xer_ca = (value >> XER_CA) & 0x01;
xer_cmp = (value >> XER_CMP) & 0xFF;
xer_bc = (value >> XER_BC) & 0x3F;
}
target_ulong do_load_msr (CPUPPCState *env)
{
return (msr_vr << MSR_VR) |
(msr_ap << MSR_AP) |
(msr_sa << MSR_SA) |
(msr_key << MSR_KEY) |
(msr_pow << MSR_POW) |
(msr_tlb << MSR_TLB) |
(msr_ile << MSR_ILE) |
(msr_ee << MSR_EE) |
(msr_pr << MSR_PR) |
(msr_fp << MSR_FP) |
(msr_me << MSR_ME) |
(msr_fe0 << MSR_FE0) |
(msr_se << MSR_SE) |
(msr_be << MSR_BE) |
(msr_fe1 << MSR_FE1) |
(msr_al << MSR_AL) |
(msr_ip << MSR_IP) |
(msr_ir << MSR_IR) |
(msr_dr << MSR_DR) |
(msr_pe << MSR_PE) |
(msr_px << MSR_PX) |
(msr_ri << MSR_RI) |
(msr_le << MSR_LE);
}
void do_compute_hflags (CPUPPCState *env)
{
/* Compute current hflags */
env->hflags = (msr_pr << MSR_PR) | (msr_le << MSR_LE) |
(msr_fp << MSR_FP) | (msr_fe0 << MSR_FE0) | (msr_fe1 << MSR_FE1) |
(msr_vr << MSR_VR) | (msr_ap << MSR_AP) | (msr_sa << MSR_SA) |
(msr_se << MSR_SE) | (msr_be << MSR_BE);
}
void do_store_msr (CPUPPCState *env, target_ulong value)
{
value &= env->msr_mask;
if (((value >> MSR_IR) & 1) != msr_ir ||
((value >> MSR_DR) & 1) != msr_dr) {
/* Flush all tlb when changing translation mode
* When using software driven TLB, we may also need to reload
* all defined TLBs
*/
tlb_flush(env, 1);
env->interrupt_request |= CPU_INTERRUPT_EXITTB;
}
#if 0
if (loglevel != 0) {
fprintf(logfile, "%s: T0 %08lx\n", __func__, value);
}
#endif
msr_vr = (value >> MSR_VR) & 1;
msr_ap = (value >> MSR_AP) & 1;
msr_sa = (value >> MSR_SA) & 1;
msr_key = (value >> MSR_KEY) & 1;
msr_pow = (value >> MSR_POW) & 1;
msr_tlb = (value >> MSR_TLB) & 1;
msr_ile = (value >> MSR_ILE) & 1;
msr_ee = (value >> MSR_EE) & 1;
msr_pr = (value >> MSR_PR) & 1;
msr_fp = (value >> MSR_FP) & 1;
msr_me = (value >> MSR_ME) & 1;
msr_fe0 = (value >> MSR_FE0) & 1;
msr_se = (value >> MSR_SE) & 1;
msr_be = (value >> MSR_BE) & 1;
msr_fe1 = (value >> MSR_FE1) & 1;
msr_al = (value >> MSR_AL) & 1;
msr_ip = (value >> MSR_IP) & 1;
msr_ir = (value >> MSR_IR) & 1;
msr_dr = (value >> MSR_DR) & 1;
msr_pe = (value >> MSR_PE) & 1;
msr_px = (value >> MSR_PX) & 1;
msr_ri = (value >> MSR_RI) & 1;
msr_le = (value >> MSR_LE) & 1;
do_compute_hflags(env);
}
float64 do_load_fpscr (CPUPPCState *env)
{
/* The 32 MSB of the target fpr are undefined.
* They'll be zero...
*/
union {
float64 d;
struct {
uint32_t u[2];
} s;
} u;
int i;
#ifdef WORDS_BIGENDIAN
#define WORD0 0
#define WORD1 1
#else
#define WORD0 1
#define WORD1 0
#endif
u.s.u[WORD0] = 0;
u.s.u[WORD1] = 0;
for (i = 0; i < 8; i++)
u.s.u[WORD1] |= env->fpscr[i] << (4 * i);
return u.d;
}
void do_store_fpscr (CPUPPCState *env, float64 f, uint32_t mask)
{
/*
* We use only the 32 LSB of the incoming fpr
*/
union {
double d;
struct {
uint32_t u[2];
} s;
} u;
int i, rnd_type;
u.d = f;
if (mask & 0x80)
env->fpscr[0] = (env->fpscr[0] & 0x9) | ((u.s.u[WORD1] >> 28) & ~0x9);
for (i = 1; i < 7; i++) {
if (mask & (1 << (7 - i)))
env->fpscr[i] = (u.s.u[WORD1] >> (4 * (7 - i))) & 0xF;
}
/* TODO: update FEX & VX */
/* Set rounding mode */
switch (env->fpscr[0] & 0x3) {
case 0:
/* Best approximation (round to nearest) */
rnd_type = float_round_nearest_even;
break;
case 1:
/* Smaller magnitude (round toward zero) */
rnd_type = float_round_to_zero;
break;
case 2:
/* Round toward +infinite */
rnd_type = float_round_up;
break;
default:
case 3:
/* Round toward -infinite */
rnd_type = float_round_down;
break;
}
set_float_rounding_mode(rnd_type, &env->fp_status);
}
/*****************************************************************************/
/* Exception processing */
#if defined (CONFIG_USER_ONLY)
void do_interrupt (CPUState *env)
{
env->exception_index = -1;
}
#else
static void dump_syscall(CPUState *env)
{
fprintf(logfile, "syscall r0=0x%08x r3=0x%08x r4=0x%08x r5=0x%08x r6=0x%08x nip=0x%08x\n",
env->gpr[0], env->gpr[3], env->gpr[4],
env->gpr[5], env->gpr[6], env->nip);
}
void do_interrupt (CPUState *env)
{
target_ulong msr, *srr_0, *srr_1, tmp;
int excp;
excp = env->exception_index;
msr = do_load_msr(env);
/* The default is to use SRR0 & SRR1 to save the exception context */
srr_0 = &env->spr[SPR_SRR0];
srr_1 = &env->spr[SPR_SRR1];
#if defined (DEBUG_EXCEPTIONS)
if ((excp == EXCP_PROGRAM || excp == EXCP_DSI) && msr_pr == 1) {
if (loglevel != 0) {
fprintf(logfile, "Raise exception at 0x%08lx => 0x%08x (%02x)\n",
(unsigned long)env->nip, excp, env->error_code);
cpu_dump_state(env, logfile, fprintf, 0);
}
}
#endif
if (loglevel & CPU_LOG_INT) {
fprintf(logfile, "Raise exception at 0x%08lx => 0x%08x (%02x)\n",
(unsigned long)env->nip, excp, env->error_code);
}
msr_pow = 0;
/* Generate informations in save/restore registers */
switch (excp) {
/* Generic PowerPC exceptions */
case EXCP_RESET: /* 0x0100 */
if (PPC_EXCP(env) != PPC_FLAGS_EXCP_40x) {
if (msr_ip)
excp += 0xFFC00;
excp |= 0xFFC00000;
} else {
srr_0 = &env->spr[SPR_40x_SRR2];
srr_1 = &env->spr[SPR_40x_SRR3];
}
goto store_next;
case EXCP_MACHINE_CHECK: /* 0x0200 */
if (msr_me == 0) {
cpu_abort(env, "Machine check exception while not allowed\n");
}
if (PPC_EXCP(env) == PPC_FLAGS_EXCP_40x) {
srr_0 = &env->spr[SPR_40x_SRR2];
srr_1 = &env->spr[SPR_40x_SRR3];
}
msr_me = 0;
break;
case EXCP_DSI: /* 0x0300 */
/* Store exception cause */
/* data location address has been stored
* when the fault has been detected
*/
msr &= ~0xFFFF0000;
#if defined (DEBUG_EXCEPTIONS)
if (loglevel) {
fprintf(logfile, "DSI exception: DSISR=0x%08x, DAR=0x%08x\n",
env->spr[SPR_DSISR], env->spr[SPR_DAR]);
} else {
printf("DSI exception: DSISR=0x%08x, DAR=0x%08x\n",
env->spr[SPR_DSISR], env->spr[SPR_DAR]);
}
#endif
goto store_next;
case EXCP_ISI: /* 0x0400 */
/* Store exception cause */
msr &= ~0xFFFF0000;
msr |= env->error_code;
#if defined (DEBUG_EXCEPTIONS)
if (loglevel != 0) {
fprintf(logfile, "ISI exception: msr=0x%08x, nip=0x%08x\n",
msr, env->nip);
}
#endif
goto store_next;
case EXCP_EXTERNAL: /* 0x0500 */
if (msr_ee == 0) {
#if defined (DEBUG_EXCEPTIONS)
if (loglevel > 0) {
fprintf(logfile, "Skipping hardware interrupt\n");
}
#endif
/* Requeue it */
env->interrupt_request |= CPU_INTERRUPT_HARD;
return;
}
goto store_next;
case EXCP_ALIGN: /* 0x0600 */
if (PPC_EXCP(env) != PPC_FLAGS_EXCP_601) {
/* Store exception cause */
/* Get rS/rD and rA from faulting opcode */
env->spr[SPR_DSISR] |=
(ldl_code((env->nip - 4)) & 0x03FF0000) >> 16;
/* data location address has been stored
* when the fault has been detected
*/
} else {
/* IO error exception on PowerPC 601 */
/* XXX: TODO */
cpu_abort(env,
"601 IO error exception is not implemented yet !\n");
}
goto store_current;
case EXCP_PROGRAM: /* 0x0700 */
msr &= ~0xFFFF0000;
switch (env->error_code & ~0xF) {
case EXCP_FP:
if (msr_fe0 == 0 && msr_fe1 == 0) {
#if defined (DEBUG_EXCEPTIONS)
printf("Ignore floating point exception\n");
#endif
return;
}
msr |= 0x00100000;
/* Set FX */
env->fpscr[7] |= 0x8;
/* Finally, update FEX */
if ((((env->fpscr[7] & 0x3) << 3) | (env->fpscr[6] >> 1)) &
((env->fpscr[1] << 1) | (env->fpscr[0] >> 3)))
env->fpscr[7] |= 0x4;
break;
case EXCP_INVAL:
// printf("Invalid instruction at 0x%08x\n", env->nip);
msr |= 0x00080000;
break;
case EXCP_PRIV:
msr |= 0x00040000;
break;
case EXCP_TRAP:
msr |= 0x00020000;
break;
default:
/* Should never occur */
break;
}
msr |= 0x00010000;
goto store_current;
case EXCP_NO_FP: /* 0x0800 */
msr &= ~0xFFFF0000;
goto store_current;
case EXCP_DECR:
if (msr_ee == 0) {
#if 1
/* Requeue it */
env->interrupt_request |= CPU_INTERRUPT_TIMER;
#endif
return;
}
goto store_next;
case EXCP_SYSCALL: /* 0x0C00 */
/* NOTE: this is a temporary hack to support graphics OSI
calls from the MOL driver */
if (env->gpr[3] == 0x113724fa && env->gpr[4] == 0x77810f9b &&
env->osi_call) {
if (env->osi_call(env) != 0)
return;
}
if (loglevel & CPU_LOG_INT) {
dump_syscall(env);
}
goto store_next;
case EXCP_TRACE: /* 0x0D00 */
/* XXX: TODO */
cpu_abort(env, "Trace exception is not implemented yet !\n");
goto store_next;
case EXCP_PERF: /* 0x0F00 */
/* XXX: TODO */
cpu_abort(env,
"Performance counter exception is not implemented yet !\n");
goto store_next;
/* 32 bits PowerPC specific exceptions */
case EXCP_FP_ASSIST: /* 0x0E00 */
/* XXX: TODO */
cpu_abort(env, "Floating point assist exception "
"is not implemented yet !\n");
goto store_next;
/* 64 bits PowerPC exceptions */
case EXCP_DSEG: /* 0x0380 */
/* XXX: TODO */
cpu_abort(env, "Data segment exception is not implemented yet !\n");
goto store_next;
case EXCP_ISEG: /* 0x0480 */
/* XXX: TODO */
cpu_abort(env,
"Instruction segment exception is not implemented yet !\n");
goto store_next;
case EXCP_HDECR: /* 0x0980 */
if (msr_ee == 0) {
#if 1
/* Requeue it */
env->interrupt_request |= CPU_INTERRUPT_TIMER;
#endif
return;
}
cpu_abort(env,
"Hypervisor decrementer exception is not implemented yet !\n");
goto store_next;
/* Implementation specific exceptions */
case 0x0A00:
if (PPC_EXCP(env) != PPC_FLAGS_EXCP_602) {
/* Critical interrupt on G2 */
/* XXX: TODO */
cpu_abort(env, "G2 critical interrupt is not implemented yet !\n");
goto store_next;
} else {
cpu_abort(env, "Invalid exception 0x0A00 !\n");
}
return;
case 0x0F20:
switch (PPC_EXCP(env)) {
case PPC_FLAGS_EXCP_40x:
/* APU unavailable on 405 */
/* XXX: TODO */
cpu_abort(env,
"APU unavailable exception is not implemented yet !\n");
goto store_next;
case PPC_FLAGS_EXCP_74xx:
/* Altivec unavailable */
/* XXX: TODO */
cpu_abort(env, "Altivec unavailable exception "
"is not implemented yet !\n");
goto store_next;
default:
cpu_abort(env, "Invalid exception 0x0F20 !\n");
break;
}
return;
case 0x1000:
switch (PPC_EXCP(env)) {
case PPC_FLAGS_EXCP_40x:
/* PIT on 4xx */
/* XXX: TODO */
cpu_abort(env, "40x PIT exception is not implemented yet !\n");
goto store_next;
case PPC_FLAGS_EXCP_602:
case PPC_FLAGS_EXCP_603:
/* ITLBMISS on 602/603 */
msr &= ~0xF00F0000;
msr_tgpr = 1;
goto store_gprs;
default:
cpu_abort(env, "Invalid exception 0x1000 !\n");
break;
}
return;
case 0x1010:
switch (PPC_EXCP(env)) {
case PPC_FLAGS_EXCP_40x:
/* FIT on 4xx */
cpu_abort(env, "40x FIT exception is not implemented yet !\n");
/* XXX: TODO */
goto store_next;
default:
cpu_abort(env, "Invalid exception 0x1010 !\n");
break;
}
return;
case 0x1020:
switch (PPC_EXCP(env)) {
case PPC_FLAGS_EXCP_40x:
/* Watchdog on 4xx */
/* XXX: TODO */
cpu_abort(env,
"40x watchdog exception is not implemented yet !\n");
goto store_next;
default:
cpu_abort(env, "Invalid exception 0x1020 !\n");
break;
}
return;
case 0x1100:
switch (PPC_EXCP(env)) {
case PPC_FLAGS_EXCP_40x:
/* DTLBMISS on 4xx */
/* XXX: TODO */
cpu_abort(env,
"40x DTLBMISS exception is not implemented yet !\n");
goto store_next;
case PPC_FLAGS_EXCP_602:
case PPC_FLAGS_EXCP_603:
/* DLTLBMISS on 602/603 */
msr &= ~0xF00F0000;
msr_tgpr = 1;
goto store_gprs;
default:
cpu_abort(env, "Invalid exception 0x1100 !\n");
break;
}
return;
case 0x1200:
switch (PPC_EXCP(env)) {
case PPC_FLAGS_EXCP_40x:
/* ITLBMISS on 4xx */
/* XXX: TODO */
cpu_abort(env,
"40x ITLBMISS exception is not implemented yet !\n");
goto store_next;
case PPC_FLAGS_EXCP_602:
case PPC_FLAGS_EXCP_603:
/* DSTLBMISS on 602/603 */
msr &= ~0xF00F0000;
msr_tgpr = 1;
store_gprs:
#if defined (DEBUG_SOFTWARE_TLB)
if (loglevel != 0) {
fprintf(logfile, "6xx %sTLB miss: IM %08x DM %08x IC %08x "
"DC %08x H1 %08x H2 %08x %08x\n",
excp == 0x1000 ? "I" : excp == 0x1100 ? "DL" : "DS",
env->spr[SPR_IMISS], env->spr[SPR_DMISS],
env->spr[SPR_ICMP], env->spr[SPR_DCMP],
env->spr[SPR_DHASH1], env->spr[SPR_DHASH2],
env->error_code);
}
#endif
/* Swap temporary saved registers with GPRs */
tmp = env->gpr[0];
env->gpr[0] = env->tgpr[0];
env->tgpr[0] = tmp;
tmp = env->gpr[1];
env->gpr[1] = env->tgpr[1];
env->tgpr[1] = tmp;
tmp = env->gpr[2];
env->gpr[2] = env->tgpr[2];
env->tgpr[2] = tmp;
tmp = env->gpr[3];
env->gpr[3] = env->tgpr[3];
env->tgpr[3] = tmp;
msr |= env->crf[0] << 28;
msr |= env->error_code; /* key, D/I, S/L bits */
/* Set way using a LRU mechanism */
msr |= (env->last_way ^ 1) << 17;
goto store_next;
default:
cpu_abort(env, "Invalid exception 0x1200 !\n");
break;
}
return;
case 0x1300:
switch (PPC_EXCP(env)) {
case PPC_FLAGS_EXCP_601:
case PPC_FLAGS_EXCP_602:
case PPC_FLAGS_EXCP_603:
case PPC_FLAGS_EXCP_604:
case PPC_FLAGS_EXCP_7x0:
case PPC_FLAGS_EXCP_7x5:
/* IABR on 6xx/7xx */
/* XXX: TODO */
cpu_abort(env, "IABR exception is not implemented yet !\n");
goto store_next;
default:
cpu_abort(env, "Invalid exception 0x1300 !\n");
break;
}
return;
case 0x1400:
switch (PPC_EXCP(env)) {
case PPC_FLAGS_EXCP_601:
case PPC_FLAGS_EXCP_602:
case PPC_FLAGS_EXCP_603:
case PPC_FLAGS_EXCP_604:
case PPC_FLAGS_EXCP_7x0:
case PPC_FLAGS_EXCP_7x5:
/* SMI on 6xx/7xx */
/* XXX: TODO */
cpu_abort(env, "SMI exception is not implemented yet !\n");
goto store_next;
default:
cpu_abort(env, "Invalid exception 0x1400 !\n");
break;
}
return;
case 0x1500:
switch (PPC_EXCP(env)) {
case PPC_FLAGS_EXCP_602:
/* Watchdog on 602 */
cpu_abort(env,
"602 watchdog exception is not implemented yet !\n");
goto store_next;
case PPC_FLAGS_EXCP_970:
/* Soft patch exception on 970 */
/* XXX: TODO */
cpu_abort(env,
"970 soft-patch exception is not implemented yet !\n");
goto store_next;
case PPC_FLAGS_EXCP_74xx:
/* VPU assist on 74xx */
/* XXX: TODO */
cpu_abort(env, "VPU assist exception is not implemented yet !\n");
goto store_next;
default:
cpu_abort(env, "Invalid exception 0x1500 !\n");
break;
}
return;
case 0x1600:
switch (PPC_EXCP(env)) {
case PPC_FLAGS_EXCP_602:
/* Emulation trap on 602 */
/* XXX: TODO */
cpu_abort(env, "602 emulation trap exception "
"is not implemented yet !\n");
goto store_next;
case PPC_FLAGS_EXCP_970:
/* Maintenance exception on 970 */
/* XXX: TODO */
cpu_abort(env,
"970 maintenance exception is not implemented yet !\n");
goto store_next;
default:
cpu_abort(env, "Invalid exception 0x1600 !\n");
break;
}
return;
case 0x1700:
switch (PPC_EXCP(env)) {
case PPC_FLAGS_EXCP_7x0:
case PPC_FLAGS_EXCP_7x5:
/* Thermal management interrupt on G3 */
/* XXX: TODO */
cpu_abort(env, "G3 thermal management exception "
"is not implemented yet !\n");
goto store_next;
case PPC_FLAGS_EXCP_970:
/* VPU assist on 970 */
/* XXX: TODO */
cpu_abort(env,
"970 VPU assist exception is not implemented yet !\n");
goto store_next;
default:
cpu_abort(env, "Invalid exception 0x1700 !\n");
break;
}
return;
case 0x1800:
switch (PPC_EXCP(env)) {
case PPC_FLAGS_EXCP_970:
/* Thermal exception on 970 */
/* XXX: TODO */
cpu_abort(env, "970 thermal management exception "
"is not implemented yet !\n");
goto store_next;
default:
cpu_abort(env, "Invalid exception 0x1800 !\n");
break;
}
return;
case 0x2000:
switch (PPC_EXCP(env)) {
case PPC_FLAGS_EXCP_40x:
/* DEBUG on 4xx */
/* XXX: TODO */
cpu_abort(env, "40x debug exception is not implemented yet !\n");
goto store_next;
case PPC_FLAGS_EXCP_601:
/* Run mode exception on 601 */
/* XXX: TODO */
cpu_abort(env,
"601 run mode exception is not implemented yet !\n");
goto store_next;
default:
cpu_abort(env, "Invalid exception 0x1800 !\n");
break;
}
return;
/* Other exceptions */
/* Qemu internal exceptions:
* we should never come here with those values: abort execution
*/
default:
cpu_abort(env, "Invalid exception: code %d (%04x)\n", excp, excp);
return;
store_current:
/* save current instruction location */
*srr_0 = (env->nip - 4) & 0xFFFFFFFFULL;
break;
store_next:
/* save next instruction location */
*srr_0 = env->nip & 0xFFFFFFFFULL;
break;
}
/* Save msr */
*srr_1 = msr;
/* If we disactivated any translation, flush TLBs */
if (msr_ir || msr_dr) {
tlb_flush(env, 1);
}
/* reload MSR with correct bits */
msr_ee = 0;
msr_pr = 0;
msr_fp = 0;
msr_fe0 = 0;
msr_se = 0;
msr_be = 0;
msr_fe1 = 0;
msr_ir = 0;
msr_dr = 0;
msr_ri = 0;
msr_le = msr_ile;
msr_sf = msr_isf;
do_compute_hflags(env);
/* Jump to handler */
env->nip = excp;
env->exception_index = EXCP_NONE;
/* ensure that no TB jump will be modified as
the program flow was changed */
#ifdef __sparc__
tmp_T0 = 0;
#else
T0 = 0;
#endif
env->interrupt_request |= CPU_INTERRUPT_EXITTB;
}
#endif /* !CONFIG_USER_ONLY */