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qemu/target-ppc/helper.c
j_mayer c62db10577 Support for PowerPC BookE exception model. 
No need to requeue timer exceptions.
Fix nip saving for 64 bits PowerPC.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2556 c046a42c-6fe2-441c-8c8c-71466251a162
2007-03-31 12:57:57 +00:00

2006 lines
63 KiB
C
Raw Blame History

/*
* PowerPC emulation helpers for qemu.
*
* Copyright (c) 2003-2007 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 <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include <signal.h>
#include <assert.h>
#include "cpu.h"
#include "exec-all.h"
//#define DEBUG_MMU
//#define DEBUG_BATS
//#define DEBUG_SOFTWARE_TLB
//#define DEBUG_EXCEPTIONS
//#define FLUSH_ALL_TLBS
/*****************************************************************************/
/* PowerPC MMU emulation */
#if defined(CONFIG_USER_ONLY)
int cpu_ppc_handle_mmu_fault (CPUState *env, uint32_t address, int rw,
int is_user, int is_softmmu)
{
int exception, error_code;
if (rw == 2) {
exception = EXCP_ISI;
error_code = 0;
} else {
exception = EXCP_DSI;
error_code = 0;
if (rw)
error_code |= 0x02000000;
env->spr[SPR_DAR] = address;
env->spr[SPR_DSISR] = error_code;
}
env->exception_index = exception;
env->error_code = error_code;
return 1;
}
target_ulong cpu_get_phys_page_debug (CPUState *env, target_ulong addr)
{
return addr;
}
#else
/* Common routines used by software and hardware TLBs emulation */
static inline int pte_is_valid (target_ulong pte0)
{
return pte0 & 0x80000000 ? 1 : 0;
}
static inline void pte_invalidate (target_ulong *pte0)
{
*pte0 &= ~0x80000000;
}
#define PTE_PTEM_MASK 0x7FFFFFBF
#define PTE_CHECK_MASK (TARGET_PAGE_MASK | 0x7B)
static int pte_check (mmu_ctx_t *ctx,
target_ulong pte0, target_ulong pte1, int h, int rw)
{
int access, ret;
access = 0;
ret = -1;
/* Check validity and table match */
if (pte_is_valid(pte0) && (h == ((pte0 >> 6) & 1))) {
/* Check vsid & api */
if ((pte0 & PTE_PTEM_MASK) == ctx->ptem) {
if (ctx->raddr != (target_ulong)-1) {
/* all matches should have equal RPN, WIMG & PP */
if ((ctx->raddr & PTE_CHECK_MASK) != (pte1 & PTE_CHECK_MASK)) {
if (loglevel > 0)
fprintf(logfile, "Bad RPN/WIMG/PP\n");
return -3;
}
}
/* Compute access rights */
if (ctx->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;
}
}
/* Keep the matching PTE informations */
ctx->raddr = pte1;
ctx->prot = access;
if ((rw == 0 && (access & PAGE_READ)) ||
(rw == 1 && (access & PAGE_WRITE))) {
/* Access granted */
#if defined (DEBUG_MMU)
if (loglevel > 0)
fprintf(logfile, "PTE access granted !\n");
#endif
ret = 0;
} else {
/* Access right violation */
#if defined (DEBUG_MMU)
if (loglevel > 0)
fprintf(logfile, "PTE access rejected\n");
#endif
ret = -2;
}
}
}
return ret;
}
static int pte_update_flags (mmu_ctx_t *ctx, target_ulong *pte1p,
int ret, int rw)
{
int store = 0;
/* Update page flags */
if (!(*pte1p & 0x00000100)) {
/* Update accessed flag */
*pte1p |= 0x00000100;
store = 1;
}
if (!(*pte1p & 0x00000080)) {
if (rw == 1 && ret == 0) {
/* Update changed flag */
*pte1p |= 0x00000080;
store = 1;
} else {
/* Force page fault for first write access */
ctx->prot &= ~PAGE_WRITE;
}
}
return store;
}
/* Software driven TLB helpers */
static int ppc6xx_tlb_getnum (CPUState *env, target_ulong eaddr,
int way, int is_code)
{
int nr;
/* Select TLB num in a way from address */
nr = (eaddr >> TARGET_PAGE_BITS) & (env->tlb_per_way - 1);
/* Select TLB way */
nr += env->tlb_per_way * way;
/* 6xx have separate TLBs for instructions and data */
if (is_code && env->id_tlbs == 1)
nr += env->nb_tlb;
return nr;
}
void ppc6xx_tlb_invalidate_all (CPUState *env)
{
ppc6xx_tlb_t *tlb;
int nr, max;
#if defined (DEBUG_SOFTWARE_TLB) && 0
if (loglevel != 0) {
fprintf(logfile, "Invalidate all TLBs\n");
}
#endif
/* Invalidate all defined software TLB */
max = env->nb_tlb;
if (env->id_tlbs == 1)
max *= 2;
for (nr = 0; nr < max; nr++) {
tlb = &env->tlb[nr].tlb6;
#if !defined(FLUSH_ALL_TLBS)
tlb_flush_page(env, tlb->EPN);
#endif
pte_invalidate(&tlb->pte0);
}
#if defined(FLUSH_ALL_TLBS)
tlb_flush(env, 1);
#endif
}
static inline void __ppc6xx_tlb_invalidate_virt (CPUState *env,
target_ulong eaddr,
int is_code, int match_epn)
{
ppc6xx_tlb_t *tlb;
int way, nr;
#if !defined(FLUSH_ALL_TLBS)
/* Invalidate ITLB + DTLB, all ways */
for (way = 0; way < env->nb_ways; way++) {
nr = ppc6xx_tlb_getnum(env, eaddr, way, is_code);
tlb = &env->tlb[nr].tlb6;
if (pte_is_valid(tlb->pte0) && (match_epn == 0 || eaddr == tlb->EPN)) {
#if defined (DEBUG_SOFTWARE_TLB)
if (loglevel != 0) {
fprintf(logfile, "TLB invalidate %d/%d " ADDRX "\n",
nr, env->nb_tlb, eaddr);
}
#endif
pte_invalidate(&tlb->pte0);
tlb_flush_page(env, tlb->EPN);
}
}
#else
/* XXX: PowerPC specification say this is valid as well */
ppc6xx_tlb_invalidate_all(env);
#endif
}
void ppc6xx_tlb_invalidate_virt (CPUState *env, target_ulong eaddr,
int is_code)
{
__ppc6xx_tlb_invalidate_virt(env, eaddr, is_code, 0);
}
void ppc6xx_tlb_store (CPUState *env, target_ulong EPN, int way, int is_code,
target_ulong pte0, target_ulong pte1)
{
ppc6xx_tlb_t *tlb;
int nr;
nr = ppc6xx_tlb_getnum(env, EPN, way, is_code);
tlb = &env->tlb[nr].tlb6;
#if defined (DEBUG_SOFTWARE_TLB)
if (loglevel != 0) {
fprintf(logfile, "Set TLB %d/%d EPN " ADDRX " PTE0 " ADDRX
" PTE1 " ADDRX "\n", nr, env->nb_tlb, EPN, pte0, pte1);
}
#endif
/* Invalidate any pending reference in Qemu for this virtual address */
__ppc6xx_tlb_invalidate_virt(env, EPN, is_code, 1);
tlb->pte0 = pte0;
tlb->pte1 = pte1;
tlb->EPN = EPN;
/* Store last way for LRU mechanism */
env->last_way = way;
}
static int ppc6xx_tlb_check (CPUState *env, mmu_ctx_t *ctx,
target_ulong eaddr, int rw, int access_type)
{
ppc6xx_tlb_t *tlb;
int nr, best, way;
int ret;
best = -1;
ret = -1; /* No TLB found */
for (way = 0; way < env->nb_ways; way++) {
nr = ppc6xx_tlb_getnum(env, eaddr, way,
access_type == ACCESS_CODE ? 1 : 0);
tlb = &env->tlb[nr].tlb6;
/* This test "emulates" the PTE index match for hardware TLBs */
if ((eaddr & TARGET_PAGE_MASK) != tlb->EPN) {
#if defined (DEBUG_SOFTWARE_TLB)
if (loglevel != 0) {
fprintf(logfile, "TLB %d/%d %s [" ADDRX " " ADDRX
"] <> " ADDRX "\n",
nr, env->nb_tlb,
pte_is_valid(tlb->pte0) ? "valid" : "inval",
tlb->EPN, tlb->EPN + TARGET_PAGE_SIZE, eaddr);
}
#endif
continue;
}
#if defined (DEBUG_SOFTWARE_TLB)
if (loglevel != 0) {
fprintf(logfile, "TLB %d/%d %s " ADDRX " <> " ADDRX " " ADDRX
" %c %c\n",
nr, env->nb_tlb,
pte_is_valid(tlb->pte0) ? "valid" : "inval",
tlb->EPN, eaddr, tlb->pte1,
rw ? 'S' : 'L', access_type == ACCESS_CODE ? 'I' : 'D');
}
#endif
switch (pte_check(ctx, tlb->pte0, tlb->pte1, 0, rw)) {
case -3:
/* TLB inconsistency */
return -1;
case -2:
/* Access violation */
ret = -2;
best = nr;
break;
case -1:
default:
/* No match */
break;
case 0:
/* access granted */
/* XXX: we should go on looping to check all TLBs consistency
* but we can speed-up the whole thing as the
* result would be undefined if TLBs are not consistent.
*/
ret = 0;
best = nr;
goto done;
}
}
if (best != -1) {
done:
#if defined (DEBUG_SOFTWARE_TLB)
if (loglevel > 0) {
fprintf(logfile, "found TLB at addr 0x%08lx prot=0x%01x ret=%d\n",
ctx->raddr & TARGET_PAGE_MASK, ctx->prot, ret);
}
#endif
/* Update page flags */
pte_update_flags(ctx, &env->tlb[best].tlb6.pte1, ret, rw);
}
return ret;
}
/* Perform BAT hit & translation */
static int get_bat (CPUState *env, mmu_ctx_t *ctx,
target_ulong virtual, int rw, int type)
{
target_ulong *BATlt, *BATut, *BATu, *BATl;
target_ulong base, BEPIl, BEPIu, bl;
int i;
int ret = -1;
#if defined (DEBUG_BATS)
if (loglevel > 0) {
fprintf(logfile, "%s: %cBAT v 0x" ADDRX "\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" ADDRX "\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" ADDRX " BATu 0x" ADDRX
" BATl 0x" ADDRX "\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 */
ctx->raddr = (*BATl & 0xF0000000) |
((virtual & 0x0FFE0000 & bl) | (*BATl & 0x0FFE0000)) |
(virtual & 0x0001F000);
if (*BATl & 0x00000001)
ctx->prot = PAGE_READ;
if (*BATl & 0x00000002)
ctx->prot = PAGE_WRITE | PAGE_READ;
#if defined (DEBUG_BATS)
if (loglevel > 0) {
fprintf(logfile, "BAT %d match: r 0x" ADDRX
" prot=%c%c\n",
i, ctx->raddr, ctx->prot & PAGE_READ ? 'R' : '-',
ctx->prot & PAGE_WRITE ? 'W' : '-');
}
#endif
ret = 0;
break;
}
}
}
if (ret < 0) {
#if defined (DEBUG_BATS)
printf("no BAT match for 0x" ADDRX ":\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" ADDRX " BATu 0x" ADDRX
" BATl 0x" ADDRX " \n\t"
"0x" ADDRX " 0x" ADDRX " 0x" ADDRX "\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 (mmu_ctx_t *ctx, int h, int rw)
{
target_ulong base, pte0, pte1;
int i, good = -1;
int ret;
ret = -1; /* No entry found */
base = ctx->pg_addr[h];
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" ADDRX " => 0x" ADDRX
" 0x" ADDRX " %d %d %d 0x" ADDRX "\n",
base + (i * 8), pte0, pte1,
pte0 >> 31, h, (pte0 >> 6) & 1, ctx->ptem);
}
#endif
switch (pte_check(ctx, pte0, pte1, h, rw)) {
case -3:
/* PTE inconsistency */
return -1;
case -2:
/* Access violation */
ret = -2;
good = i;
break;
case -1:
default:
/* No PTE match */
break;
case 0:
/* access granted */
/* XXX: we should go on looping to check all PTEs consistency
* but if we can speed-up the whole thing as the
* result would be undefined if PTEs are not consistent.
*/
ret = 0;
good = i;
goto done;
}
}
if (good != -1) {
done:
#if defined (DEBUG_MMU)
if (loglevel > 0) {
fprintf(logfile, "found PTE at addr 0x" ADDRX " prot=0x%01x "
"ret=%d\n",
ctx->raddr, ctx->prot, ret);
}
#endif
/* Update page flags */
pte1 = ctx->raddr;
if (pte_update_flags(ctx, &pte1, ret, rw) == 1)
stl_phys_notdirty(base + (good * 8) + 4, pte1);
}
return ret;
}
static inline target_phys_addr_t get_pgaddr (target_phys_addr_t sdr1,
target_phys_addr_t hash,
target_phys_addr_t mask)
{
return (sdr1 & 0xFFFF0000) | (hash & mask);
}
/* Perform segment based translation */
static int get_segment (CPUState *env, mmu_ctx_t *ctx,
target_ulong eaddr, int rw, int type)
{
target_phys_addr_t sdr, hash, mask;
target_ulong sr, vsid, pgidx;
int ret = -1, ret2;
sr = env->sr[eaddr >> 28];
#if defined (DEBUG_MMU)
if (loglevel > 0) {
fprintf(logfile, "Check segment v=0x" ADDRX " %d 0x" ADDRX " nip=0x"
ADDRX " lr=0x" ADDRX " ir=%d dr=%d pr=%d %d t=%d\n",
eaddr, eaddr >> 28, sr, env->nip,
env->lr, msr_ir, msr_dr, msr_pr, rw, type);
}
#endif
ctx->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" ADDRX "\n",
ctx->key, sr & 0x10000000);
#endif
/* Check if instruction fetch is allowed, if needed */
if (type != ACCESS_CODE || (sr & 0x10000000) == 0) {
/* Page address translation */
pgidx = (eaddr >> TARGET_PAGE_BITS) & 0xFFFF;
vsid = sr & 0x00FFFFFF;
hash = ((vsid ^ pgidx) & 0x0007FFFF) << 6;
/* Primary table address */
sdr = env->sdr1;
mask = ((sdr & 0x000001FF) << 16) | 0xFFC0;
ctx->pg_addr[0] = get_pgaddr(sdr, hash, mask);
/* Secondary table address */
hash = (~hash) & 0x01FFFFC0;
ctx->pg_addr[1] = get_pgaddr(sdr, hash, mask);
ctx->ptem = (vsid << 7) | (pgidx >> 10);
/* Initialize real address with an invalid value */
ctx->raddr = (target_ulong)-1;
if (unlikely(PPC_MMU(env) == PPC_FLAGS_MMU_SOFT_6xx)) {
/* Software TLB search */
ret = ppc6xx_tlb_check(env, ctx, eaddr, rw, type);
} else {
#if defined (DEBUG_MMU)
if (loglevel > 0) {
fprintf(logfile, "0 sdr1=0x" ADDRX " vsid=0x%06x "
"api=0x%04x hash=0x%07x pg_addr=0x" ADDRX "\n",
sdr, vsid, pgidx, hash, ctx->pg_addr[0]);
}
#endif
/* Primary table lookup */
ret = find_pte(ctx, 0, rw);
if (ret < 0) {
/* Secondary table lookup */
#if defined (DEBUG_MMU)
if (eaddr != 0xEFFFFFFF && loglevel > 0) {
fprintf(logfile,
"1 sdr1=0x" ADDRX " vsid=0x%06x api=0x%04x "
"hash=0x%05x pg_addr=0x" ADDRX "\n",
sdr, vsid, pgidx, hash, ctx->pg_addr[1]);
}
#endif
ret2 = find_pte(ctx, 1, 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 :-)
*/
ctx->raddr = eaddr;
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 || ctx->key != 1) && (rw == 0 || ctx->key != 0)) {
ctx->raddr = eaddr;
ret = 2;
} else {
ret = -2;
}
}
return ret;
}
int mmu4xx_get_physical_address (CPUState *env, mmu_ctx_t *ctx,
uint32_t address, int rw, int access_type)
{
ppcemb_tlb_t *tlb;
target_phys_addr_t raddr;
target_ulong mask;
int i, ret, zsel, zpr;
ret = -6;
for (i = 0; i < env->nb_tlb; i++) {
tlb = &env->tlb[i].tlbe;
/* Check valid flag */
if (!(tlb->prot & PAGE_VALID)) {
if (loglevel)
fprintf(logfile, "%s: TLB %d not valid\n", __func__, i);
continue;
}
mask = ~(tlb->size - 1);
if (loglevel) {
fprintf(logfile, "%s: TLB %d address %08x PID %04x <=> "
"%08x %08x %04x\n",
__func__, i, address, env->spr[SPR_40x_PID],
tlb->EPN, mask, tlb->PID);
}
/* Check PID */
if (tlb->PID != 0 && tlb->PID != env->spr[SPR_40x_PID])
continue;
/* Check effective address */
if ((address & mask) != tlb->EPN)
continue;
raddr = (tlb->RPN & mask) | (address & ~mask);
zsel = (tlb->attr >> 4) & 0xF;
zpr = (env->spr[SPR_40x_ZPR] >> (28 - (2 * zsel))) & 0x3;
if (loglevel) {
fprintf(logfile, "%s: TLB %d zsel %d zpr %d rw %d attr %08x\n",
__func__, i, zsel, zpr, rw, tlb->attr);
}
if (access_type == ACCESS_CODE) {
/* Check execute enable bit */
switch (zpr) {
case 0x0:
if (msr_pr) {
ret = -3;
ctx->prot = 0;
break;
}
/* No break here */
case 0x1:
case 0x2:
/* Check from TLB entry */
if (!(tlb->prot & PAGE_EXEC)) {
ret = -3;
} else {
if (tlb->prot & PAGE_WRITE)
ctx->prot = PAGE_READ | PAGE_WRITE;
else
ctx->prot = PAGE_READ;
ret = 0;
}
break;
case 0x3:
/* All accesses granted */
ret = 0;
ctx->prot = PAGE_READ | PAGE_WRITE;
break;
}
} else {
switch (zpr) {
case 0x0:
if (msr_pr) {
ret = -2;
ctx->prot = 0;
break;
}
/* No break here */
case 0x1:
case 0x2:
/* Check from TLB entry */
/* Check write protection bit */
if (rw && !(tlb->prot & PAGE_WRITE)) {
ret = -2;
} else {
ret = 2;
if (tlb->prot & PAGE_WRITE)
ctx->prot = PAGE_READ | PAGE_WRITE;
else
ctx->prot = PAGE_READ;
}
break;
case 0x3:
/* All accesses granted */
ret = 2;
ctx->prot = PAGE_READ | PAGE_WRITE;
break;
}
}
if (ret >= 0) {
ctx->raddr = raddr;
if (loglevel) {
fprintf(logfile, "%s: access granted " ADDRX " => " REGX
" %d\n", __func__, address, ctx->raddr, ctx->prot);
}
return i;
}
}
return ret;
}
static int check_physical (CPUState *env, mmu_ctx_t *ctx,
target_ulong eaddr, int rw)
{
int in_plb, ret;
ctx->raddr = eaddr;
ctx->prot = PAGE_READ;
ret = 0;
if (unlikely(msr_pe != 0 && PPC_MMU(env) == PPC_FLAGS_MMU_403)) {
/* 403 family add some particular protections,
* using PBL/PBU registers for accesses with no translation.
*/
in_plb =
/* Check PLB validity */
(env->pb[0] < env->pb[1] &&
/* and address in plb area */
eaddr >= env->pb[0] && eaddr < env->pb[1]) ||
(env->pb[2] < env->pb[3] &&
eaddr >= env->pb[2] && eaddr < env->pb[3]) ? 1 : 0;
if (in_plb ^ msr_px) {
/* Access in protected area */
if (rw == 1) {
/* Access is not allowed */
ret = -2;
}
} else {
/* Read-write access is allowed */
ctx->prot |= PAGE_WRITE;
}
} else {
ctx->prot |= PAGE_WRITE;
}
return ret;
}
int get_physical_address (CPUState *env, mmu_ctx_t *ctx, target_ulong eaddr,
int rw, int access_type, int check_BATs)
{
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 */
ret = check_physical(env, ctx, eaddr, rw);
} else {
switch (PPC_MMU(env)) {
case PPC_FLAGS_MMU_32B:
case PPC_FLAGS_MMU_SOFT_6xx:
/* Try to find a BAT */
ret = -1;
if (check_BATs)
ret = get_bat(env, ctx, eaddr, rw, access_type);
if (ret < 0) {
/* We didn't match any BAT entry */
ret = get_segment(env, ctx, eaddr, rw, access_type);
}
break;
case PPC_FLAGS_MMU_SOFT_4xx:
ret = mmu4xx_get_physical_address(env, ctx, eaddr,
rw, access_type);
break;
default:
/* XXX: TODO */
cpu_abort(env, "MMU model not implemented\n");
return -1;
}
}
#if 0
if (loglevel > 0) {
fprintf(logfile, "%s address " ADDRX " => " ADDRX "\n",
__func__, eaddr, ctx->raddr);
}
#endif
return ret;
}
target_ulong cpu_get_phys_page_debug (CPUState *env, target_ulong addr)
{
mmu_ctx_t ctx;
if (unlikely(get_physical_address(env, &ctx, addr, 0, ACCESS_INT, 1) != 0))
return -1;
return ctx.raddr & TARGET_PAGE_MASK;
}
/* Perform address translation */
int cpu_ppc_handle_mmu_fault (CPUState *env, uint32_t address, int rw,
int is_user, int is_softmmu)
{
mmu_ctx_t ctx;
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;
}
ret = get_physical_address(env, &ctx, address, rw, access_type, 1);
if (ret == 0) {
ret = tlb_set_page(env, address & TARGET_PAGE_MASK,
ctx.raddr & TARGET_PAGE_MASK, ctx.prot,
is_user, is_softmmu);
} else if (ret < 0) {
#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 or TLB */
if (unlikely(PPC_MMU(env) == PPC_FLAGS_MMU_SOFT_6xx)) {
exception = EXCP_I_TLBMISS;
env->spr[SPR_IMISS] = address;
env->spr[SPR_ICMP] = 0x80000000 | ctx.ptem;
error_code = 1 << 18;
goto tlb_miss;
} else if (unlikely(PPC_MMU(env) == PPC_FLAGS_MMU_SOFT_4xx)) {
exception = EXCP_40x_ITLBMISS;
error_code = 0;
env->spr[SPR_40x_DEAR] = address;
env->spr[SPR_40x_ESR] = 0x00000000;
} else {
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 or TLB */
if (unlikely(PPC_MMU(env) == PPC_FLAGS_MMU_SOFT_6xx)) {
if (rw == 1) {
exception = EXCP_DS_TLBMISS;
error_code = 1 << 16;
} else {
exception = EXCP_DL_TLBMISS;
error_code = 0;
}
env->spr[SPR_DMISS] = address;
env->spr[SPR_DCMP] = 0x80000000 | ctx.ptem;
tlb_miss:
error_code |= ctx.key << 19;
env->spr[SPR_HASH1] = ctx.pg_addr[0];
env->spr[SPR_HASH2] = ctx.pg_addr[1];
/* Do not alter DAR nor DSISR */
goto out;
} else if (unlikely(PPC_MMU(env) == PPC_FLAGS_MMU_SOFT_4xx)) {
exception = EXCP_40x_DTLBMISS;
error_code = 0;
env->spr[SPR_40x_DEAR] = address;
if (rw)
env->spr[SPR_40x_ESR] = 0x00800000;
else
env->spr[SPR_40x_ESR] = 0x00000000;
} else {
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;
}
break;
case -5:
/* No match in segment table */
exception = EXCP_DSEG;
error_code = 0;
break;
}
if (exception == EXCP_DSI && rw == 1)
error_code |= 0x02000000;
/* Store fault address */
env->spr[SPR_DAR] = address;
env->spr[SPR_DSISR] = error_code;
}
out:
#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 " ADDRX " to " ADDRX " (" ADDRX ")\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" ADDRX " (0x" ADDRX ")\n",
ID, nr, ul == 0 ? 'u' : 'l', value, 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);
#else
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;
}
/*****************************************************************************/
/* Special registers manipulation */
#if defined(TARGET_PPC64)
target_ulong ppc_load_asr (CPUPPCState *env)
{
return env->asr;
}
void ppc_store_asr (CPUPPCState *env, target_ulong value)
{
if (env->asr != value) {
env->asr = value;
tlb_flush(env, 1);
}
}
#endif
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" ADDRX "\n", __func__, value);
}
#endif
if (env->sdr1 != value) {
env->sdr1 = value;
tlb_flush(env, 1);
}
}
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" ADDRX " " ADDRX "\n",
__func__, srnum, 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
tlb_flush(env, 1);
#endif
}
}
#endif /* !defined (CONFIG_USER_ONLY) */
uint32_t ppc_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 ppc_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) & 0x7F;
}
/* Swap temporary saved registers with GPRs */
static inline void swap_gpr_tgpr (CPUPPCState *env)
{
ppc_gpr_t tmp;
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;
}
/* GDBstub can read and write MSR... */
target_ulong do_load_msr (CPUPPCState *env)
{
return
#if defined (TARGET_PPC64)
((target_ulong)msr_sf << MSR_SF) |
((target_ulong)msr_isf << MSR_ISF) |
((target_ulong)msr_hv << MSR_HV) |
#endif
((target_ulong)msr_ucle << MSR_UCLE) |
((target_ulong)msr_vr << MSR_VR) | /* VR / SPE */
((target_ulong)msr_ap << MSR_AP) |
((target_ulong)msr_sa << MSR_SA) |
((target_ulong)msr_key << MSR_KEY) |
((target_ulong)msr_pow << MSR_POW) | /* POW / WE */
((target_ulong)msr_tlb << MSR_TLB) | /* TLB / TGPE / CE */
((target_ulong)msr_ile << MSR_ILE) |
((target_ulong)msr_ee << MSR_EE) |
((target_ulong)msr_pr << MSR_PR) |
((target_ulong)msr_fp << MSR_FP) |
((target_ulong)msr_me << MSR_ME) |
((target_ulong)msr_fe0 << MSR_FE0) |
((target_ulong)msr_se << MSR_SE) | /* SE / DWE / UBLE */
((target_ulong)msr_be << MSR_BE) | /* BE / DE */
((target_ulong)msr_fe1 << MSR_FE1) |
((target_ulong)msr_al << MSR_AL) |
((target_ulong)msr_ip << MSR_IP) |
((target_ulong)msr_ir << MSR_IR) | /* IR / IS */
((target_ulong)msr_dr << MSR_DR) | /* DR / DS */
((target_ulong)msr_pe << MSR_PE) | /* PE / EP */
((target_ulong)msr_px << MSR_PX) | /* PX / PMM */
((target_ulong)msr_ri << MSR_RI) |
((target_ulong)msr_le << MSR_LE);
}
void do_store_msr (CPUPPCState *env, target_ulong value)
{
int enter_pm;
value &= env->msr_mask;
if (((value >> MSR_IR) & 1) != msr_ir ||
((value >> MSR_DR) & 1) != msr_dr) {
/* Flush all tlb when changing translation mode */
tlb_flush(env, 1);
env->interrupt_request |= CPU_INTERRUPT_EXITTB;
}
#if 0
if (loglevel != 0) {
fprintf(logfile, "%s: T0 %08lx\n", __func__, value);
}
#endif
switch (PPC_EXCP(env)) {
case PPC_FLAGS_EXCP_602:
case PPC_FLAGS_EXCP_603:
if (((value >> MSR_TGPR) & 1) != msr_tgpr) {
/* Swap temporary saved registers with GPRs */
swap_gpr_tgpr(env);
}
break;
default:
break;
}
#if defined (TARGET_PPC64)
msr_sf = (value >> MSR_SF) & 1;
msr_isf = (value >> MSR_ISF) & 1;
msr_hv = (value >> MSR_HV) & 1;
#endif
msr_ucle = (value >> MSR_UCLE) & 1;
msr_vr = (value >> MSR_VR) & 1; /* VR / SPE */
msr_ap = (value >> MSR_AP) & 1;
msr_sa = (value >> MSR_SA) & 1;
msr_key = (value >> MSR_KEY) & 1;
msr_pow = (value >> MSR_POW) & 1; /* POW / WE */
msr_tlb = (value >> MSR_TLB) & 1; /* TLB / TGPR / CE */
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; /* SE / DWE / UBLE */
msr_be = (value >> MSR_BE) & 1; /* BE / DE */
msr_fe1 = (value >> MSR_FE1) & 1;
msr_al = (value >> MSR_AL) & 1;
msr_ip = (value >> MSR_IP) & 1;
msr_ir = (value >> MSR_IR) & 1; /* IR / IS */
msr_dr = (value >> MSR_DR) & 1; /* DR / DS */
msr_pe = (value >> MSR_PE) & 1; /* PE / EP */
msr_px = (value >> MSR_PX) & 1; /* PX / PMM */
msr_ri = (value >> MSR_RI) & 1;
msr_le = (value >> MSR_LE) & 1;
do_compute_hflags(env);
enter_pm = 0;
switch (PPC_EXCP(env)) {
case PPC_FLAGS_EXCP_603:
/* Don't handle SLEEP mode: we should disable all clocks...
* No dynamic power-management.
*/
if (msr_pow == 1 && (env->spr[SPR_HID0] & 0x00C00000) != 0)
enter_pm = 1;
break;
case PPC_FLAGS_EXCP_604:
if (msr_pow == 1)
enter_pm = 1;
break;
case PPC_FLAGS_EXCP_7x0:
if (msr_pow == 1 && (env->spr[SPR_HID0] & 0x00E00000) != 0)
enter_pm = 1;
break;
default:
break;
}
if (enter_pm) {
/* power save: exit cpu loop */
env->halted = 1;
env->exception_index = EXCP_HLT;
cpu_loop_exit();
}
}
#if defined(TARGET_PPC64)
void ppc_store_msr_32 (CPUPPCState *env, uint32_t value)
{
do_store_msr(env,
(do_load_msr(env) & ~0xFFFFFFFFULL) | (value & 0xFFFFFFFF));
}
#endif
void do_compute_hflags (CPUPPCState *env)
{
/* Compute current hflags */
env->hflags = (msr_cm << MSR_CM) | (msr_vr << MSR_VR) |
(msr_ap << MSR_AP) | (msr_sa << MSR_SA) | (msr_pr << MSR_PR) |
(msr_fp << MSR_FP) | (msr_fe0 << MSR_FE0) | (msr_se << MSR_SE) |
(msr_be << MSR_BE) | (msr_fe1 << MSR_FE1) | (msr_le << MSR_LE);
#if defined (TARGET_PPC64)
/* No care here: PowerPC 64 MSR_SF means the same as MSR_CM for BookE */
env->hflags |= (msr_sf << (MSR_SF - 32)) | (msr_hv << (MSR_HV - 32));
#endif
}
/*****************************************************************************/
/* Exception processing */
#if defined (CONFIG_USER_ONLY)
void do_interrupt (CPUState *env)
{
env->exception_index = -1;
}
int ppc_hw_interrupt (CPUState *env)
{
env->exception_index = -1;
return 0;
}
#else /* defined (CONFIG_USER_ONLY) */
static void dump_syscall(CPUState *env)
{
fprintf(logfile, "syscall r0=0x" REGX " r3=0x" REGX " r4=0x" REGX
" r5=0x" REGX " r6=0x" REGX " nip=0x" ADDRX "\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, *asrr_0, *asrr_1;
int excp, idx;
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];
asrr_0 = NULL;
asrr_1 = NULL;
#if defined (DEBUG_EXCEPTIONS)
if ((excp == EXCP_PROGRAM || excp == EXCP_DSI) && msr_pr == 1) {
if (loglevel != 0) {
fprintf(logfile,
"Raise exception at 0x" ADDRX " => 0x%08x (%02x)\n",
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" ADDRX " => 0x%08x (%02x)\n",
env->nip, excp, env->error_code);
}
msr_pow = 0;
idx = -1;
/* Generate informations in save/restore registers */
switch (excp) {
/* Generic PowerPC exceptions */
case EXCP_RESET: /* 0x0100 */
switch (PPC_EXCP(env)) {
case PPC_FLAGS_EXCP_40x:
srr_0 = &env->spr[SPR_40x_SRR2];
srr_1 = &env->spr[SPR_40x_SRR3];
break;
case PPC_FLAGS_EXCP_BOOKE:
idx = 0;
srr_0 = &env->spr[SPR_BOOKE_CSRR0];
srr_1 = &env->spr[SPR_BOOKE_CSRR1];
break;
default:
if (msr_ip)
excp += 0xFFC00;
excp |= 0xFFC00000;
break;
}
goto store_next;
case EXCP_MACHINE_CHECK: /* 0x0200 */
switch (PPC_EXCP(env)) {
case PPC_FLAGS_EXCP_40x:
srr_0 = &env->spr[SPR_40x_SRR2];
srr_1 = &env->spr[SPR_40x_SRR3];
break;
case PPC_FLAGS_EXCP_BOOKE:
idx = 1;
srr_0 = &env->spr[SPR_BOOKE_MCSRR0];
srr_1 = &env->spr[SPR_BOOKE_MCSRR1];
asrr_0 = &env->spr[SPR_BOOKE_CSRR0];
asrr_1 = &env->spr[SPR_BOOKE_CSRR1];
msr_ce = 0;
break;
default:
break;
}
msr_me = 0;
break;
case EXCP_DSI: /* 0x0300 */
/* Store exception cause */
/* data location address has been stored
* when the fault has been detected
*/
idx = 2;
msr &= ~0xFFFF0000;
#if defined (DEBUG_EXCEPTIONS)
if (loglevel) {
fprintf(logfile, "DSI exception: DSISR=0x" ADDRX" DAR=0x" ADDRX
"\n", env->spr[SPR_DSISR], env->spr[SPR_DAR]);
} else {
printf("DSI exception: DSISR=0x" ADDRX" DAR=0x" ADDRX "\n",
env->spr[SPR_DSISR], env->spr[SPR_DAR]);
}
#endif
goto store_next;
case EXCP_ISI: /* 0x0400 */
/* Store exception cause */
idx = 3;
msr &= ~0xFFFF0000;
msr |= env->error_code;
#if defined (DEBUG_EXCEPTIONS)
if (loglevel != 0) {
fprintf(logfile, "ISI exception: msr=0x" ADDRX ", nip=0x" ADDRX
"\n", msr, env->nip);
}
#endif
goto store_next;
case EXCP_EXTERNAL: /* 0x0500 */
idx = 4;
goto store_next;
case EXCP_ALIGN: /* 0x0600 */
if (likely(PPC_EXCP(env) != PPC_FLAGS_EXCP_601)) {
/* Store exception cause */
idx = 5;
/* 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 */
idx = 6;
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" ADDRX "\n", env->nip);
msr |= 0x00080000;
break;
case EXCP_PRIV:
msr |= 0x00040000;
break;
case EXCP_TRAP:
idx = 15;
msr |= 0x00020000;
break;
default:
/* Should never occur */
break;
}
msr |= 0x00010000;
goto store_current;
case EXCP_NO_FP: /* 0x0800 */
idx = 7;
msr &= ~0xFFFF0000;
goto store_current;
case EXCP_DECR:
goto store_next;
case EXCP_SYSCALL: /* 0x0C00 */
idx = 8;
/* 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 */
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 */
/* XXX: TODO */
cpu_abort(env, "Hypervisor decrementer exception is not implemented "
"yet !\n");
goto store_next;
/* Implementation specific exceptions */
case 0x0A00:
if (likely(env->spr[SPR_PVR] == CPU_PPC_G2 ||
env->spr[SPR_PVR] == CPU_PPC_G2LE)) {
/* 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:
idx = 9;
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:
idx = 10;
switch (PPC_EXCP(env)) {
case PPC_FLAGS_EXCP_40x:
/* PIT on 4xx */
msr &= ~0xFFFF0000;
if (loglevel != 0)
fprintf(logfile, "PIT exception\n");
goto store_next;
case PPC_FLAGS_EXCP_602:
case PPC_FLAGS_EXCP_603:
/* ITLBMISS on 602/603 */
goto store_gprs;
case PPC_FLAGS_EXCP_7x5:
/* ITLBMISS on 745/755 */
goto tlb_miss;
default:
cpu_abort(env, "Invalid exception 0x1000 !\n");
break;
}
return;
case 0x1010:
idx = 11;
switch (PPC_EXCP(env)) {
case PPC_FLAGS_EXCP_40x:
/* FIT on 4xx */
msr &= ~0xFFFF0000;
if (loglevel != 0)
fprintf(logfile, "FIT exception\n");
goto store_next;
default:
cpu_abort(env, "Invalid exception 0x1010 !\n");
break;
}
return;
case 0x1020:
idx = 12;
switch (PPC_EXCP(env)) {
case PPC_FLAGS_EXCP_40x:
/* Watchdog on 4xx */
msr &= ~0xFFFF0000;
if (loglevel != 0)
fprintf(logfile, "WDT exception\n");
goto store_next;
case PPC_FLAGS_EXCP_BOOKE:
srr_0 = &env->spr[SPR_BOOKE_CSRR0];
srr_1 = &env->spr[SPR_BOOKE_CSRR1];
break;
default:
cpu_abort(env, "Invalid exception 0x1020 !\n");
break;
}
return;
case 0x1100:
idx = 13;
switch (PPC_EXCP(env)) {
case PPC_FLAGS_EXCP_40x:
/* DTLBMISS on 4xx */
msr &= ~0xFFFF0000;
goto store_next;
case PPC_FLAGS_EXCP_602:
case PPC_FLAGS_EXCP_603:
/* DLTLBMISS on 602/603 */
goto store_gprs;
case PPC_FLAGS_EXCP_7x5:
/* DLTLBMISS on 745/755 */
goto tlb_miss;
default:
cpu_abort(env, "Invalid exception 0x1100 !\n");
break;
}
return;
case 0x1200:
idx = 14;
switch (PPC_EXCP(env)) {
case PPC_FLAGS_EXCP_40x:
/* ITLBMISS on 4xx */
msr &= ~0xFFFF0000;
goto store_next;
case PPC_FLAGS_EXCP_602:
case PPC_FLAGS_EXCP_603:
/* DSTLBMISS on 602/603 */
store_gprs:
/* Swap temporary saved registers with GPRs */
swap_gpr_tgpr(env);
msr_tgpr = 1;
#if defined (DEBUG_SOFTWARE_TLB)
if (loglevel != 0) {
const unsigned char *es;
target_ulong *miss, *cmp;
int en;
if (excp == 0x1000) {
es = "I";
en = 'I';
miss = &env->spr[SPR_IMISS];
cmp = &env->spr[SPR_ICMP];
} else {
if (excp == 0x1100)
es = "DL";
else
es = "DS";
en = 'D';
miss = &env->spr[SPR_DMISS];
cmp = &env->spr[SPR_DCMP];
}
fprintf(logfile, "6xx %sTLB miss: %cM " ADDRX " %cC " ADDRX
" H1 " ADDRX " H2 " ADDRX " " ADDRX "\n",
es, en, *miss, en, *cmp,
env->spr[SPR_HASH1], env->spr[SPR_HASH2],
env->error_code);
}
#endif
goto tlb_miss;
case PPC_FLAGS_EXCP_7x5:
/* DSTLBMISS on 745/755 */
tlb_miss:
msr &= ~0xF83F0000;
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) & (env->nb_ways - 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 */
/* XXX: TODO */
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;
case PPC_FLAGS_EXCP_BOOKE:
srr_0 = &env->spr[SPR_BOOKE_CSRR0];
srr_1 = &env->spr[SPR_BOOKE_CSRR1];
break;
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;
break;
store_next:
/* save next instruction location */
*srr_0 = env->nip;
break;
}
/* Save msr */
*srr_1 = msr;
if (asrr_0 != NULL)
*asrr_0 = *srr_0;
if (asrr_1 != NULL)
*asrr_1 = *srr_1;
/* 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;
if (PPC_EXCP(env) == PPC_FLAGS_EXCP_BOOKE) {
msr_cm = msr_icm;
if (idx == -1 || (idx >= 16 && idx < 32)) {
cpu_abort(env, "Invalid exception index for excp %d %08x idx %d\n",
excp, excp, idx);
}
#if defined(TARGET_PPC64)
if (msr_cm)
env->nip = (uint64_t)env->spr[SPR_BOOKE_IVPR];
else
#endif
env->nip = (uint32_t)env->spr[SPR_BOOKE_IVPR];
if (idx < 16)
env->nip |= env->spr[SPR_BOOKE_IVOR0 + idx];
else if (idx < 38)
env->nip |= env->spr[SPR_BOOKE_IVOR32 + idx - 32];
} else {
msr_sf = msr_isf;
env->nip = excp;
}
do_compute_hflags(env);
/* Jump to handler */
env->exception_index = EXCP_NONE;
}
int ppc_hw_interrupt (CPUState *env)
{
int raised = 0;
#if 0
printf("%s: %p pending %08x req %08x %08x me %d ee %d\n",
__func__, env, env->pending_interrupts,
env->interrupt_request, interrupt_request,
msr_me, msr_ee);
#endif
/* Raise it */
if (env->pending_interrupts & (1 << PPC_INTERRUPT_RESET)) {
/* External reset / critical input */
env->exception_index = EXCP_RESET;
env->pending_interrupts &= ~(1 << PPC_INTERRUPT_RESET);
raised = 1;
}
if (raised == 0 && msr_me != 0) {
/* Machine check exception */
if (env->pending_interrupts & (1 << PPC_INTERRUPT_MCK)) {
env->exception_index = EXCP_MACHINE_CHECK;
env->pending_interrupts &= ~(1 << PPC_INTERRUPT_MCK);
raised = 1;
}
}
if (raised == 0 && msr_ee != 0) {
#if defined(TARGET_PPC64H) /* PowerPC 64 with hypervisor mode support */
/* Hypervisor decrementer exception */
if (env->pending_interrupts & (1 << PPC_INTERRUPT_HDECR)) {
env->exception_index = EXCP_HDECR;
env->pending_interrupts &= ~(1 << PPC_INTERRUPT_HDECR);
raised = 1;
} else
#endif
/* Decrementer exception */
if (env->pending_interrupts & (1 << PPC_INTERRUPT_DECR)) {
env->exception_index = EXCP_DECR;
env->pending_interrupts &= ~(1 << PPC_INTERRUPT_DECR);
raised = 1;
/* Programmable interval timer on embedded PowerPC */
} else if (env->pending_interrupts & (1 << PPC_INTERRUPT_PIT)) {
env->exception_index = EXCP_40x_PIT;
env->pending_interrupts &= ~(1 << PPC_INTERRUPT_PIT);
raised = 1;
/* Fixed interval timer on embedded PowerPC */
} else if (env->pending_interrupts & (1 << PPC_INTERRUPT_FIT)) {
env->exception_index = EXCP_40x_FIT;
env->pending_interrupts &= ~(1 << PPC_INTERRUPT_FIT);
raised = 1;
/* Watchdog timer on embedded PowerPC */
} else if (env->pending_interrupts & (1 << PPC_INTERRUPT_WDT)) {
env->exception_index = EXCP_40x_WATCHDOG;
env->pending_interrupts &= ~(1 << PPC_INTERRUPT_WDT);
raised = 1;
/* External interrupt */
} else if (env->pending_interrupts & (1 << PPC_INTERRUPT_EXT)) {
env->exception_index = EXCP_EXTERNAL;
env->pending_interrupts &= ~(1 << PPC_INTERRUPT_EXT);
raised = 1;
}
#if 0 // TODO
/* External debug exception */
} else if (env->pending_interrupts & (1 << PPC_INTERRUPT_DEBUG)) {
env->exception_index = EXCP_xxx;
env->pending_interrupts &= ~(1 << PPC_INTERRUPT_DEBUG);
raised = 1;
#endif
}
if (raised != 0) {
env->error_code = 0;
do_interrupt(env);
}
return raised;
}
#endif /* !CONFIG_USER_ONLY */
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