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helper.c
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/*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include <signal.h>
#include "cpu.h"
#include "exec-all.h"
#include "helper_regs.h"
#include "qemu-common.h"
#include "kvm.h"
//#define DEBUG_MMU
//#define DEBUG_BATS
//#define DEBUG_SLB
//#define DEBUG_SOFTWARE_TLB
//#define DUMP_PAGE_TABLES
//#define DEBUG_EXCEPTIONS
//#define FLUSH_ALL_TLBS
#ifdef DEBUG_MMU
# define LOG_MMU(...) qemu_log(__VA_ARGS__)
# define LOG_MMU_STATE(env) log_cpu_state((env), 0)
#else
# define LOG_MMU(...) do { } while (0)
# define LOG_MMU_STATE(...) do { } while (0)
#endif
#ifdef DEBUG_SOFTWARE_TLB
# define LOG_SWTLB(...) qemu_log(__VA_ARGS__)
#else
# define LOG_SWTLB(...) do { } while (0)
#endif
#ifdef DEBUG_BATS
# define LOG_BATS(...) qemu_log(__VA_ARGS__)
#else
# define LOG_BATS(...) do { } while (0)
#endif
#ifdef DEBUG_SLB
# define LOG_SLB(...) qemu_log(__VA_ARGS__)
#else
# define LOG_SLB(...) do { } while (0)
#endif
#ifdef DEBUG_EXCEPTIONS
# define LOG_EXCP(...) qemu_log(__VA_ARGS__)
#else
# define LOG_EXCP(...) do { } while (0)
#endif
/*****************************************************************************/
/* PowerPC MMU emulation */
#if defined(CONFIG_USER_ONLY)
int cpu_ppc_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
int mmu_idx, int is_softmmu)
{
int exception, error_code;
if (rw == 2) {
exception = POWERPC_EXCP_ISI;
error_code = 0x40000000;
} else {
exception = POWERPC_EXCP_DSI;
error_code = 0x40000000;
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;
}
#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;
}
#if defined(TARGET_PPC64)
static inline int pte64_is_valid(target_ulong pte0)
{
return pte0 & 0x0000000000000001ULL ? 1 : 0;
}
static inline void pte64_invalidate(target_ulong *pte0)
{
*pte0 &= ~0x0000000000000001ULL;
}
#endif
#define PTE_PTEM_MASK 0x7FFFFFBF
#define PTE_CHECK_MASK (TARGET_PAGE_MASK | 0x7B)
#if defined(TARGET_PPC64)
#define PTE64_PTEM_MASK 0xFFFFFFFFFFFFFF80ULL
#define PTE64_CHECK_MASK (TARGET_PAGE_MASK | 0x7F)
#endif
static inline int pp_check(int key, int pp, int nx)
{
int access;
/* Compute access rights */
/* When pp is 3/7, the result is undefined. Set it to noaccess */
access = 0;
if (key == 0) {
switch (pp) {
case 0x0:
case 0x1:
case 0x2:
access |= PAGE_WRITE;
/* No break here */
case 0x3:
case 0x6:
access |= PAGE_READ;
break;
}
} else {
switch (pp) {
case 0x0:
case 0x6:
access = 0;
break;
case 0x1:
case 0x3:
access = PAGE_READ;
break;
case 0x2:
access = PAGE_READ | PAGE_WRITE;
break;
}
}
if (nx == 0)
access |= PAGE_EXEC;
return access;
}
static inline int check_prot(int prot, int rw, int access_type)
{
int ret;
if (access_type == ACCESS_CODE) {
if (prot & PAGE_EXEC)
ret = 0;
else
ret = -2;
} else if (rw) {
if (prot & PAGE_WRITE)
ret = 0;
else
ret = -2;
} else {
if (prot & PAGE_READ)
ret = 0;
else
ret = -2;
}
return ret;
}
static inline int _pte_check(mmu_ctx_t *ctx, int is_64b, target_ulong pte0,
target_ulong pte1, int h, int rw, int type)
{
target_ulong ptem, mmask;
int access, ret, pteh, ptev, pp;
ret = -1;
/* Check validity and table match */
#if defined(TARGET_PPC64)
if (is_64b) {
ptev = pte64_is_valid(pte0);
pteh = (pte0 >> 1) & 1;
} else
#endif
{
ptev = pte_is_valid(pte0);
pteh = (pte0 >> 6) & 1;
}
if (ptev && h == pteh) {
/* Check vsid & api */
#if defined(TARGET_PPC64)
if (is_64b) {
ptem = pte0 & PTE64_PTEM_MASK;
mmask = PTE64_CHECK_MASK;
pp = (pte1 & 0x00000003) | ((pte1 >> 61) & 0x00000004);
ctx->nx = (pte1 >> 2) & 1; /* No execute bit */
ctx->nx |= (pte1 >> 3) & 1; /* Guarded bit */
} else
#endif
{
ptem = pte0 & PTE_PTEM_MASK;
mmask = PTE_CHECK_MASK;
pp = pte1 & 0x00000003;
}
if (ptem == ctx->ptem) {
if (ctx->raddr != (target_phys_addr_t)-1ULL) {
/* all matches should have equal RPN, WIMG & PP */
if ((ctx->raddr & mmask) != (pte1 & mmask)) {
qemu_log("Bad RPN/WIMG/PP\n");
return -3;
}
}
/* Compute access rights */
access = pp_check(ctx->key, pp, ctx->nx);
/* Keep the matching PTE informations */
ctx->raddr = pte1;
ctx->prot = access;
ret = check_prot(ctx->prot, rw, type);
if (ret == 0) {
/* Access granted */
LOG_MMU("PTE access granted !\n");
} else {
/* Access right violation */
LOG_MMU("PTE access rejected\n");
}
}
}
return ret;
}
static inline int pte32_check(mmu_ctx_t *ctx, target_ulong pte0,
target_ulong pte1, int h, int rw, int type)
{
return _pte_check(ctx, 0, pte0, pte1, h, rw, type);
}
#if defined(TARGET_PPC64)
static inline int pte64_check(mmu_ctx_t *ctx, target_ulong pte0,
target_ulong pte1, int h, int rw, int type)
{
return _pte_check(ctx, 1, pte0, pte1, h, rw, type);
}
#endif
static inline 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 inline 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;
}
static inline void ppc6xx_tlb_invalidate_all(CPUState *env)
{
ppc6xx_tlb_t *tlb;
int nr, max;
//LOG_SWTLB("Invalidate all TLBs\n");
/* 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;
pte_invalidate(&tlb->pte0);
}
tlb_flush(env, 1);
}
static inline void __ppc6xx_tlb_invalidate_virt(CPUState *env,
target_ulong eaddr,
int is_code, int match_epn)
{
#if !defined(FLUSH_ALL_TLBS)
ppc6xx_tlb_t *tlb;
int way, nr;
/* 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)) {
LOG_SWTLB("TLB invalidate %d/%d " TARGET_FMT_lx "\n", nr,
env->nb_tlb, eaddr);
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
}
static inline 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;
LOG_SWTLB("Set TLB %d/%d EPN " TARGET_FMT_lx " PTE0 " TARGET_FMT_lx
" PTE1 " TARGET_FMT_lx "\n", nr, env->nb_tlb, EPN, pte0, pte1);
/* 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 inline 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) {
LOG_SWTLB("TLB %d/%d %s [" TARGET_FMT_lx " " TARGET_FMT_lx
"] <> " TARGET_FMT_lx "\n", nr, env->nb_tlb,
pte_is_valid(tlb->pte0) ? "valid" : "inval",
tlb->EPN, tlb->EPN + TARGET_PAGE_SIZE, eaddr);
continue;
}
LOG_SWTLB("TLB %d/%d %s " TARGET_FMT_lx " <> " TARGET_FMT_lx " "
TARGET_FMT_lx " %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');
switch (pte32_check(ctx, tlb->pte0, tlb->pte1, 0, rw, access_type)) {
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:
LOG_SWTLB("found TLB at addr " TARGET_FMT_plx " prot=%01x ret=%d\n",
ctx->raddr & TARGET_PAGE_MASK, ctx->prot, ret);
/* Update page flags */
pte_update_flags(ctx, &env->tlb[best].tlb6.pte1, ret, rw);
}
return ret;
}
/* Perform BAT hit & translation */
static inline void bat_size_prot(CPUState *env, target_ulong *blp, int *validp,
int *protp, target_ulong *BATu,
target_ulong *BATl)
{
target_ulong bl;
int pp, valid, prot;
bl = (*BATu & 0x00001FFC) << 15;
valid = 0;
prot = 0;
if (((msr_pr == 0) && (*BATu & 0x00000002)) ||
((msr_pr != 0) && (*BATu & 0x00000001))) {
valid = 1;
pp = *BATl & 0x00000003;
if (pp != 0) {
prot = PAGE_READ | PAGE_EXEC;
if (pp == 0x2)
prot |= PAGE_WRITE;
}
}
*blp = bl;
*validp = valid;
*protp = prot;
}
static inline void bat_601_size_prot(CPUState *env, target_ulong *blp,
int *validp, int *protp,
target_ulong *BATu, target_ulong *BATl)
{
target_ulong bl;
int key, pp, valid, prot;
bl = (*BATl & 0x0000003F) << 17;
LOG_BATS("b %02x ==> bl " TARGET_FMT_lx " msk " TARGET_FMT_lx "\n",
(uint8_t)(*BATl & 0x0000003F), bl, ~bl);
prot = 0;
valid = (*BATl >> 6) & 1;
if (valid) {
pp = *BATu & 0x00000003;
if (msr_pr == 0)
key = (*BATu >> 3) & 1;
else
key = (*BATu >> 2) & 1;
prot = pp_check(key, pp, 0);
}
*blp = bl;
*validp = valid;
*protp = prot;
}
static inline int get_bat(CPUState *env, mmu_ctx_t *ctx, target_ulong virtual,
int rw, int type)
{
target_ulong *BATlt, *BATut, *BATu, *BATl;
target_ulong BEPIl, BEPIu, bl;
int i, valid, prot;
int ret = -1;
LOG_BATS("%s: %cBAT v " TARGET_FMT_lx "\n", __func__,
type == ACCESS_CODE ? 'I' : 'D', virtual);
switch (type) {
case ACCESS_CODE:
BATlt = env->IBAT[1];
BATut = env->IBAT[0];
break;
default:
BATlt = env->DBAT[1];
BATut = env->DBAT[0];
break;
}
for (i = 0; i < env->nb_BATs; i++) {
BATu = &BATut[i];
BATl = &BATlt[i];
BEPIu = *BATu & 0xF0000000;
BEPIl = *BATu & 0x0FFE0000;
if (unlikely(env->mmu_model == POWERPC_MMU_601)) {
bat_601_size_prot(env, &bl, &valid, &prot, BATu, BATl);
} else {
bat_size_prot(env, &bl, &valid, &prot, BATu, BATl);
}
LOG_BATS("%s: %cBAT%d v " TARGET_FMT_lx " BATu " TARGET_FMT_lx
" BATl " TARGET_FMT_lx "\n", __func__,
type == ACCESS_CODE ? 'I' : 'D', i, virtual, *BATu, *BATl);
if ((virtual & 0xF0000000) == BEPIu &&
((virtual & 0x0FFE0000) & ~bl) == BEPIl) {
/* BAT matches */
if (valid != 0) {
/* Get physical address */
ctx->raddr = (*BATl & 0xF0000000) |
((virtual & 0x0FFE0000 & bl) | (*BATl & 0x0FFE0000)) |
(virtual & 0x0001F000);
/* Compute access rights */
ctx->prot = prot;
ret = check_prot(ctx->prot, rw, type);
if (ret == 0)
LOG_BATS("BAT %d match: r " TARGET_FMT_plx " prot=%c%c\n",
i, ctx->raddr, ctx->prot & PAGE_READ ? 'R' : '-',
ctx->prot & PAGE_WRITE ? 'W' : '-');
break;
}
}
}
if (ret < 0) {
#if defined(DEBUG_BATS)
if (qemu_log_enabled()) {
LOG_BATS("no BAT match for " TARGET_FMT_lx ":\n", virtual);
for (i = 0; i < 4; i++) {
BATu = &BATut[i];
BATl = &BATlt[i];
BEPIu = *BATu & 0xF0000000;
BEPIl = *BATu & 0x0FFE0000;
bl = (*BATu & 0x00001FFC) << 15;
LOG_BATS("%s: %cBAT%d v " TARGET_FMT_lx " BATu " TARGET_FMT_lx
" BATl " TARGET_FMT_lx " \n\t" TARGET_FMT_lx " "
TARGET_FMT_lx " " TARGET_FMT_lx "\n",
__func__, type == ACCESS_CODE ? 'I' : 'D', i, virtual,
*BATu, *BATl, BEPIu, BEPIl, bl);
}
}
#endif
}
/* No hit */
return ret;
}
/* PTE table lookup */
static inline int _find_pte(mmu_ctx_t *ctx, int is_64b, int h, int rw,
int type, int target_page_bits)
{
target_ulong base, pte0, pte1;
int i, good = -1;
int ret, r;
ret = -1; /* No entry found */
base = ctx->pg_addr[h];
for (i = 0; i < 8; i++) {
#if defined(TARGET_PPC64)
if (is_64b) {
pte0 = ldq_phys(base + (i * 16));
pte1 = ldq_phys(base + (i * 16) + 8);
/* We have a TLB that saves 4K pages, so let's
* split a huge page to 4k chunks */
if (target_page_bits != TARGET_PAGE_BITS)
pte1 |= (ctx->eaddr & (( 1 << target_page_bits ) - 1))
& TARGET_PAGE_MASK;
r = pte64_check(ctx, pte0, pte1, h, rw, type);
LOG_MMU("Load pte from " TARGET_FMT_lx " => " TARGET_FMT_lx " "
TARGET_FMT_lx " %d %d %d " TARGET_FMT_lx "\n",
base + (i * 16), pte0, pte1, (int)(pte0 & 1), h,
(int)((pte0 >> 1) & 1), ctx->ptem);
} else
#endif
{
pte0 = ldl_phys(base + (i * 8));
pte1 = ldl_phys(base + (i * 8) + 4);
r = pte32_check(ctx, pte0, pte1, h, rw, type);
LOG_MMU("Load pte from " TARGET_FMT_lx " => " TARGET_FMT_lx " "
TARGET_FMT_lx " %d %d %d " TARGET_FMT_lx "\n",
base + (i * 8), pte0, pte1, (int)(pte0 >> 31), h,
(int)((pte0 >> 6) & 1), ctx->ptem);
}
switch (r) {
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:
LOG_MMU("found PTE at addr " TARGET_FMT_lx " prot=%01x ret=%d\n",
ctx->raddr, ctx->prot, ret);
/* Update page flags */
pte1 = ctx->raddr;
if (pte_update_flags(ctx, &pte1, ret, rw) == 1) {
#if defined(TARGET_PPC64)
if (is_64b) {
stq_phys_notdirty(base + (good * 16) + 8, pte1);
} else
#endif
{
stl_phys_notdirty(base + (good * 8) + 4, pte1);
}
}
}
return ret;
}
static inline int find_pte32(mmu_ctx_t *ctx, int h, int rw, int type,
int target_page_bits)
{
return _find_pte(ctx, 0, h, rw, type, target_page_bits);
}
#if defined(TARGET_PPC64)
static inline int find_pte64(mmu_ctx_t *ctx, int h, int rw, int type,
int target_page_bits)
{
return _find_pte(ctx, 1, h, rw, type, target_page_bits);
}
#endif
static inline int find_pte(CPUState *env, mmu_ctx_t *ctx, int h, int rw,
int type, int target_page_bits)
{
#if defined(TARGET_PPC64)
if (env->mmu_model & POWERPC_MMU_64)
return find_pte64(ctx, h, rw, type, target_page_bits);
#endif
return find_pte32(ctx, h, rw, type, target_page_bits);
}
#if defined(TARGET_PPC64)
static ppc_slb_t *slb_get_entry(CPUPPCState *env, int nr)
{
ppc_slb_t *retval = &env->slb[nr];
#if 0 // XXX implement bridge mode?
if (env->spr[SPR_ASR] & 1) {
target_phys_addr_t sr_base;
sr_base = env->spr[SPR_ASR] & 0xfffffffffffff000;
sr_base += (12 * nr);
retval->tmp64 = ldq_phys(sr_base);
retval->tmp = ldl_phys(sr_base + 8);
}
#endif
return retval;
}
static void slb_set_entry(CPUPPCState *env, int nr, ppc_slb_t *slb)
{
ppc_slb_t *entry = &env->slb[nr];
if (slb == entry)
return;
entry->tmp64 = slb->tmp64;
entry->tmp = slb->tmp;
}
static inline int slb_is_valid(ppc_slb_t *slb)
{
return (int)(slb->tmp64 & 0x0000000008000000ULL);
}
static inline void slb_invalidate(ppc_slb_t *slb)
{
slb->tmp64 &= ~0x0000000008000000ULL;
}
static inline int slb_lookup(CPUPPCState *env, target_ulong eaddr,
target_ulong *vsid, target_ulong *page_mask,
int *attr, int *target_page_bits)
{
target_ulong mask;
int n, ret;
ret = -5;
LOG_SLB("%s: eaddr " TARGET_FMT_lx "\n", __func__, eaddr);
mask = 0x0000000000000000ULL; /* Avoid gcc warning */
for (n = 0; n < env->slb_nr; n++) {
ppc_slb_t *slb = slb_get_entry(env, n);
LOG_SLB("%s: seg %d %016" PRIx64 " %08"
PRIx32 "\n", __func__, n, slb->tmp64, slb->tmp);
if (slb_is_valid(slb)) {
/* SLB entry is valid */
mask = 0xFFFFFFFFF0000000ULL;
if (slb->tmp & 0x8) {
/* 16 MB PTEs */
if (target_page_bits)
*target_page_bits = 24;
} else {
/* 4 KB PTEs */
if (target_page_bits)
*target_page_bits = TARGET_PAGE_BITS;
}
if ((eaddr & mask) == (slb->tmp64 & mask)) {
/* SLB match */
*vsid = ((slb->tmp64 << 24) | (slb->tmp >> 8)) & 0x0003FFFFFFFFFFFFULL;
*page_mask = ~mask;
*attr = slb->tmp & 0xFF;
ret = n;
break;
}
}
}
return ret;
}
void ppc_slb_invalidate_all (CPUPPCState *env)
{
int n, do_invalidate;
do_invalidate = 0;
/* XXX: Warning: slbia never invalidates the first segment */
for (n = 1; n < env->slb_nr; n++) {
ppc_slb_t *slb = slb_get_entry(env, n);
if (slb_is_valid(slb)) {
slb_invalidate(slb);
slb_set_entry(env, n, slb);
/* XXX: given the fact that segment size is 256 MB or 1TB,
* and we still don't have a tlb_flush_mask(env, n, mask)
* in Qemu, we just invalidate all TLBs
*/
do_invalidate = 1;
}
}
if (do_invalidate)
tlb_flush(env, 1);
}
void ppc_slb_invalidate_one (CPUPPCState *env, uint64_t T0)
{
target_ulong vsid, page_mask;
int attr;
int n;
n = slb_lookup(env, T0, &vsid, &page_mask, &attr, NULL);
if (n >= 0) {
ppc_slb_t *slb = slb_get_entry(env, n);
if (slb_is_valid(slb)) {
slb_invalidate(slb);
slb_set_entry(env, n, slb);
/* XXX: given the fact that segment size is 256 MB or 1TB,
* and we still don't have a tlb_flush_mask(env, n, mask)
* in Qemu, we just invalidate all TLBs
*/
tlb_flush(env, 1);
}
}
}
target_ulong ppc_load_slb (CPUPPCState *env, int slb_nr)
{
target_ulong rt;
ppc_slb_t *slb = slb_get_entry(env, slb_nr);
if (slb_is_valid(slb)) {
/* SLB entry is valid */
/* Copy SLB bits 62:88 to Rt 37:63 (VSID 23:49) */
rt = slb->tmp >> 8; /* 65:88 => 40:63 */
rt |= (slb->tmp64 & 0x7) << 24; /* 62:64 => 37:39 */
/* Copy SLB bits 89:92 to Rt 33:36 (KsKpNL) */
rt |= ((slb->tmp >> 4) & 0xF) << 27;
} else {
rt = 0;
}
LOG_SLB("%s: %016" PRIx64 " %08" PRIx32 " => %d "
TARGET_FMT_lx "\n", __func__, slb->tmp64, slb->tmp, slb_nr, rt);
return rt;
}
void ppc_store_slb (CPUPPCState *env, target_ulong rb, target_ulong rs)
{
ppc_slb_t *slb;
uint64_t vsid;
uint64_t esid;
int flags, valid, slb_nr;
vsid = rs >> 12;
flags = ((rs >> 8) & 0xf);
esid = rb >> 28;
valid = (rb & (1 << 27));
slb_nr = rb & 0xfff;
slb = slb_get_entry(env, slb_nr);
slb->tmp64 = (esid << 28) | valid | (vsid >> 24);
slb->tmp = (vsid << 8) | (flags << 3);
LOG_SLB("%s: %d " TARGET_FMT_lx " - " TARGET_FMT_lx " => %016" PRIx64
" %08" PRIx32 "\n", __func__, slb_nr, rb, rs, slb->tmp64,
slb->tmp);
slb_set_entry(env, slb_nr, slb);
}
#endif /* defined(TARGET_PPC64) */
/* Perform segment based translation */
static inline target_phys_addr_t get_pgaddr(target_phys_addr_t sdr1,
int sdr_sh,
target_phys_addr_t hash,
target_phys_addr_t mask)
{
return (sdr1 & ((target_phys_addr_t)(-1ULL) << sdr_sh)) | (hash & mask);
}
static inline int get_segment(CPUState *env, mmu_ctx_t *ctx,
target_ulong eaddr, int rw, int type)
{
target_phys_addr_t sdr, hash, mask, sdr_mask, htab_mask;
target_ulong sr, vsid, vsid_mask, pgidx, page_mask;
#if defined(TARGET_PPC64)
int attr;
#endif
int ds, vsid_sh, sdr_sh, pr, target_page_bits;
int ret, ret2;
pr = msr_pr;
#if defined(TARGET_PPC64)
if (env->mmu_model & POWERPC_MMU_64) {
LOG_MMU("Check SLBs\n");
ret = slb_lookup(env, eaddr, &vsid, &page_mask, &attr,
&target_page_bits);
if (ret < 0)
return ret;
ctx->key = ((attr & 0x40) && (pr != 0)) ||
((attr & 0x80) && (pr == 0)) ? 1 : 0;
ds = 0;
ctx->nx = attr & 0x10 ? 1 : 0;
ctx->eaddr = eaddr;
vsid_mask = 0x00003FFFFFFFFF80ULL;
vsid_sh = 7;
sdr_sh = 18;
sdr_mask = 0x3FF80;
} else
#endif /* defined(TARGET_PPC64) */
{
sr = env->sr[eaddr >> 28];
page_mask = 0x0FFFFFFF;
ctx->key = (((sr & 0x20000000) && (pr != 0)) ||
((sr & 0x40000000) && (pr == 0))) ? 1 : 0;
ds = sr & 0x80000000 ? 1 : 0;
ctx->nx = sr & 0x10000000 ? 1 : 0;
vsid = sr & 0x00FFFFFF;
vsid_mask = 0x01FFFFC0;
vsid_sh = 6;
sdr_sh = 16;
sdr_mask = 0xFFC0;
target_page_bits = TARGET_PAGE_BITS;
LOG_MMU("Check segment v=" TARGET_FMT_lx " %d " TARGET_FMT_lx " nip="
TARGET_FMT_lx " lr=" TARGET_FMT_lx
" ir=%d dr=%d pr=%d %d t=%d\n",
eaddr, (int)(eaddr >> 28), sr, env->nip, env->lr, (int)msr_ir,
(int)msr_dr, pr != 0 ? 1 : 0, rw, type);
}
LOG_MMU("pte segment: key=%d ds %d nx %d vsid " TARGET_FMT_lx "\n",
ctx->key, ds, ctx->nx, vsid);
ret = -1;
if (!ds) {
/* Check if instruction fetch is allowed, if needed */
if (type != ACCESS_CODE || ctx->nx == 0) {
/* Page address translation */
/* Primary table address */
sdr = env->sdr1;
pgidx = (eaddr & page_mask) >> target_page_bits;
#if defined(TARGET_PPC64)
if (env->mmu_model & POWERPC_MMU_64) {
htab_mask = 0x0FFFFFFF >> (28 - (sdr & 0x1F));
/* XXX: this is false for 1 TB segments */
hash = ((vsid ^ pgidx) << vsid_sh) & vsid_mask;
} else
#endif
{
htab_mask = sdr & 0x000001FF;
hash = ((vsid ^ pgidx) << vsid_sh) & vsid_mask;
}
mask = (htab_mask << sdr_sh) | sdr_mask;
LOG_MMU("sdr " TARGET_FMT_plx " sh %d hash " TARGET_FMT_plx
" mask " TARGET_FMT_plx " " TARGET_FMT_lx "\n",
sdr, sdr_sh, hash, mask, page_mask);
ctx->pg_addr[0] = get_pgaddr(sdr, sdr_sh, hash, mask);
/* Secondary table address */
hash = (~hash) & vsid_mask;
LOG_MMU("sdr " TARGET_FMT_plx " sh %d hash " TARGET_FMT_plx
" mask " TARGET_FMT_plx "\n", sdr, sdr_sh, hash, mask);
ctx->pg_addr[1] = get_pgaddr(sdr, sdr_sh, hash, mask);
#if defined(TARGET_PPC64)
if (env->mmu_model & POWERPC_MMU_64) {
/* Only 5 bits of the page index are used in the AVPN */
if (target_page_bits > 23) {
ctx->ptem = (vsid << 12) |
((pgidx << (target_page_bits - 16)) & 0xF80);
} else {
ctx->ptem = (vsid << 12) | ((pgidx >> 4) & 0x0F80);
}
} else
#endif
{
ctx->ptem = (vsid << 7) | (pgidx >> 10);
}
/* Initialize real address with an invalid value */
ctx->raddr = (target_phys_addr_t)-1ULL;
if (unlikely(env->mmu_model == POWERPC_MMU_SOFT_6xx ||
env->mmu_model == POWERPC_MMU_SOFT_74xx)) {
/* Software TLB search */
ret = ppc6xx_tlb_check(env, ctx, eaddr, rw, type);
} else {
LOG_MMU("0 sdr1=" TARGET_FMT_plx " vsid=" TARGET_FMT_lx " "
"api=" TARGET_FMT_lx " hash=" TARGET_FMT_plx
" pg_addr=" TARGET_FMT_plx "\n",
sdr, vsid, pgidx, hash, ctx->pg_addr[0]);
/* Primary table lookup */
ret = find_pte(env, ctx, 0, rw, type, target_page_bits);
if (ret < 0) {
/* Secondary table lookup */
if (eaddr != 0xEFFFFFFF)
LOG_MMU("1 sdr1=" TARGET_FMT_plx " vsid=" TARGET_FMT_lx " "
"api=" TARGET_FMT_lx " hash=" TARGET_FMT_plx
" pg_addr=" TARGET_FMT_plx "\n", sdr, vsid,
pgidx, hash, ctx->pg_addr[1]);
ret2 = find_pte(env, ctx, 1, rw, type,
target_page_bits);
if (ret2 != -1)
ret = ret2;
}
}
#if defined (DUMP_PAGE_TABLES)
if (qemu_log_enabled()) {
target_phys_addr_t curaddr;
uint32_t a0, a1, a2, a3;
qemu_log("Page table: " TARGET_FMT_plx " len " TARGET_FMT_plx
"\n", sdr, mask + 0x80);
for (curaddr = sdr; curaddr < (sdr + mask + 0x80);
curaddr += 16) {
a0 = ldl_phys(curaddr);
a1 = ldl_phys(curaddr + 4);
a2 = ldl_phys(curaddr + 8);
a3 = ldl_phys(curaddr + 12);
if (a0 != 0 || a1 != 0 || a2 != 0 || a3 != 0) {
qemu_log(TARGET_FMT_plx ": %08x %08x %08x %08x\n",
curaddr, a0, a1, a2, a3);
}
}
}
#endif
} else {
LOG_MMU("No access allowed\n");
ret = -3;
}