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qemu-patch-raspberry4/target/ppc/mmu_common.c
Fabiano Rosas a09410ed1f target/ppc: Remove the software TLB model of 7450 CPUs 
(Applies to 7441, 7445, 7450, 7451, 7455, 7457, 7447, 7447a and 7448)

The QEMU-side software TLB implementation for the 7450 family of CPUs
is being removed due to lack of known users in the real world. The
last users in the code were removed by the two previous commits.

A brief history:

The feature was added in QEMU by commit 7dbe11acd8 ("Handle all MMU
models in switches...") with the mention that Linux was not able to
handle the TLB miss interrupts and the MMU model would be kept
disabled.

At some point later, commit 8ca3f6c382 ("Allow selection of all
defined PowerPC 74xx (aka G4) CPUs.") enabled the model for the 7450
family without further justification.

We have since the year 2011 [1] been unable to run OpenBIOS in the
7450s and have not heard of any other software that is used with those
CPUs in QEMU. Attempts were made to find a guest OS that implemented
the TLB miss handlers and none were found among Linux 5.15, FreeBSD 13,
MacOS9, MacOSX and MorphOS 3.15.

All CPUs that registered this feature were moved to an MMU model that
replaces the software TLB with a QEMU hardware TLB
implementation. They can now run the same software as the 7400 CPUs,
including the OSes mentioned above.

References:

- https://bugs.launchpad.net/qemu/+bug/812398
  https://gitlab.com/qemu-project/qemu/-/issues/86

- https://lists.nongnu.org/archive/html/qemu-ppc/2021-11/msg00289.html
  message id: 20211119134431.406753-1-farosas@linux.ibm.com

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20211130230123.781844-4-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2021-12-17 17:57:16 +01:00

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/*
* PowerPC MMU, TLB, SLB and BAT 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 2.1 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 "qemu/osdep.h"
#include "qemu/units.h"
#include "cpu.h"
#include "sysemu/kvm.h"
#include "kvm_ppc.h"
#include "mmu-hash64.h"
#include "mmu-hash32.h"
#include "exec/exec-all.h"
#include "exec/log.h"
#include "helper_regs.h"
#include "qemu/error-report.h"
#include "qemu/main-loop.h"
#include "qemu/qemu-print.h"
#include "internal.h"
#include "mmu-book3s-v3.h"
#include "mmu-radix64.h"
/* #define DEBUG_MMU */
/* #define DEBUG_BATS */
/* #define DEBUG_SOFTWARE_TLB */
/* #define DUMP_PAGE_TABLES */
/* #define FLUSH_ALL_TLBS */
#ifdef DEBUG_MMU
# define LOG_MMU_STATE(cpu) log_cpu_state_mask(CPU_LOG_MMU, (cpu), 0)
#else
# define LOG_MMU_STATE(cpu) do { } while (0)
#endif
#ifdef DEBUG_SOFTWARE_TLB
# define LOG_SWTLB(...) qemu_log_mask(CPU_LOG_MMU, __VA_ARGS__)
#else
# define LOG_SWTLB(...) do { } while (0)
#endif
#ifdef DEBUG_BATS
# define LOG_BATS(...) qemu_log_mask(CPU_LOG_MMU, __VA_ARGS__)
#else
# define LOG_BATS(...) do { } while (0)
#endif
void ppc_store_sdr1(CPUPPCState *env, target_ulong value)
{
PowerPCCPU *cpu = env_archcpu(env);
qemu_log_mask(CPU_LOG_MMU, "%s: " TARGET_FMT_lx "\n", __func__, value);
assert(!cpu->env.has_hv_mode || !cpu->vhyp);
#if defined(TARGET_PPC64)
if (mmu_is_64bit(env->mmu_model)) {
target_ulong sdr_mask = SDR_64_HTABORG | SDR_64_HTABSIZE;
target_ulong htabsize = value & SDR_64_HTABSIZE;
if (value & ~sdr_mask) {
qemu_log_mask(LOG_GUEST_ERROR, "Invalid bits 0x"TARGET_FMT_lx
" set in SDR1", value & ~sdr_mask);
value &= sdr_mask;
}
if (htabsize > 28) {
qemu_log_mask(LOG_GUEST_ERROR, "Invalid HTABSIZE 0x" TARGET_FMT_lx
" stored in SDR1", htabsize);
return;
}
}
#endif /* defined(TARGET_PPC64) */
/* FIXME: Should check for valid HTABMASK values in 32-bit case */
env->spr[SPR_SDR1] = value;
}
/*****************************************************************************/
/* PowerPC MMU emulation */
static int pp_check(int key, int pp, int nx)
{
int access;
/* Compute access rights */
access = 0;
if (key == 0) {
switch (pp) {
case 0x0:
case 0x1:
case 0x2:
access |= PAGE_WRITE;
/* fall through */
case 0x3:
access |= PAGE_READ;
break;
}
} else {
switch (pp) {
case 0x0:
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 int check_prot(int prot, MMUAccessType access_type)
{
return prot & prot_for_access_type(access_type) ? 0 : -2;
}
int ppc6xx_tlb_getnum(CPUPPCState *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 int ppc6xx_tlb_pte_check(mmu_ctx_t *ctx, target_ulong pte0,
target_ulong pte1, int h,
MMUAccessType access_type)
{
target_ulong ptem, mmask;
int access, ret, pteh, ptev, pp;
ret = -1;
/* Check validity and table match */
ptev = pte_is_valid(pte0);
pteh = (pte0 >> 6) & 1;
if (ptev && h == pteh) {
/* Check vsid & api */
ptem = pte0 & PTE_PTEM_MASK;
mmask = PTE_CHECK_MASK;
pp = pte1 & 0x00000003;
if (ptem == ctx->ptem) {
if (ctx->raddr != (hwaddr)-1ULL) {
/* all matches should have equal RPN, WIMG & PP */
if ((ctx->raddr & mmask) != (pte1 & mmask)) {
qemu_log_mask(CPU_LOG_MMU, "Bad RPN/WIMG/PP\n");
return -3;
}
}
/* Compute access rights */
access = pp_check(ctx->key, pp, ctx->nx);
/* Keep the matching PTE information */
ctx->raddr = pte1;
ctx->prot = access;
ret = check_prot(ctx->prot, access_type);
if (ret == 0) {
/* Access granted */
qemu_log_mask(CPU_LOG_MMU, "PTE access granted !\n");
} else {
/* Access right violation */
qemu_log_mask(CPU_LOG_MMU, "PTE access rejected\n");
}
}
}
return ret;
}
static int pte_update_flags(mmu_ctx_t *ctx, target_ulong *pte1p,
int ret, MMUAccessType access_type)
{
int store = 0;
/* Update page flags */
if (!(*pte1p & 0x00000100)) {
/* Update accessed flag */
*pte1p |= 0x00000100;
store = 1;
}
if (!(*pte1p & 0x00000080)) {
if (access_type == MMU_DATA_STORE && 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_check(CPUPPCState *env, mmu_ctx_t *ctx,
target_ulong eaddr, MMUAccessType 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 == MMU_INST_FETCH);
tlb = &env->tlb.tlb6[nr];
/* 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,
access_type == MMU_DATA_STORE ? 'S' : 'L',
access_type == MMU_INST_FETCH ? 'I' : 'D');
switch (ppc6xx_tlb_pte_check(ctx, tlb->pte0, tlb->pte1,
0, 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.tlb6[best].pte1, ret, access_type);
}
return ret;
}
/* Perform BAT hit & translation */
static inline void bat_size_prot(CPUPPCState *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 int get_bat_6xx_tlb(CPUPPCState *env, mmu_ctx_t *ctx,
target_ulong virtual, MMUAccessType access_type)
{
target_ulong *BATlt, *BATut, *BATu, *BATl;
target_ulong BEPIl, BEPIu, bl;
int i, valid, prot;
int ret = -1;
bool ifetch = access_type == MMU_INST_FETCH;
LOG_BATS("%s: %cBAT v " TARGET_FMT_lx "\n", __func__,
ifetch ? 'I' : 'D', virtual);
if (ifetch) {
BATlt = env->IBAT[1];
BATut = env->IBAT[0];
} else {
BATlt = env->DBAT[1];
BATut = env->DBAT[0];
}
for (i = 0; i < env->nb_BATs; i++) {
BATu = &BATut[i];
BATl = &BATlt[i];
BEPIu = *BATu & 0xF0000000;
BEPIl = *BATu & 0x0FFE0000;
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__,
ifetch ? '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, access_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__, ifetch ? 'I' : 'D', i, virtual,
*BATu, *BATl, BEPIu, BEPIl, bl);
}
}
#endif
}
/* No hit */
return ret;
}
/* Perform segment based translation */
static int get_segment_6xx_tlb(CPUPPCState *env, mmu_ctx_t *ctx,
target_ulong eaddr, MMUAccessType access_type,
int type)
{
PowerPCCPU *cpu = env_archcpu(env);
hwaddr hash;
target_ulong vsid;
int ds, pr, target_page_bits;
int ret;
target_ulong sr, pgidx;
pr = msr_pr;
ctx->eaddr = eaddr;
sr = env->sr[eaddr >> 28];
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;
target_page_bits = TARGET_PAGE_BITS;
qemu_log_mask(CPU_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, access_type == MMU_DATA_STORE, type);
pgidx = (eaddr & ~SEGMENT_MASK_256M) >> target_page_bits;
hash = vsid ^ pgidx;
ctx->ptem = (vsid << 7) | (pgidx >> 10);
qemu_log_mask(CPU_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 */
qemu_log_mask(CPU_LOG_MMU, "htab_base " TARGET_FMT_plx
" htab_mask " TARGET_FMT_plx
" hash " TARGET_FMT_plx "\n",
ppc_hash32_hpt_base(cpu), ppc_hash32_hpt_mask(cpu), hash);
ctx->hash[0] = hash;
ctx->hash[1] = ~hash;
/* Initialize real address with an invalid value */
ctx->raddr = (hwaddr)-1ULL;
/* Software TLB search */
ret = ppc6xx_tlb_check(env, ctx, eaddr, access_type);
#if defined(DUMP_PAGE_TABLES)
if (qemu_loglevel_mask(CPU_LOG_MMU)) {
CPUState *cs = env_cpu(env);
hwaddr curaddr;
uint32_t a0, a1, a2, a3;
qemu_log("Page table: " TARGET_FMT_plx " len " TARGET_FMT_plx
"\n", ppc_hash32_hpt_base(cpu),
ppc_hash32_hpt_mask(cpu) + 0x80);
for (curaddr = ppc_hash32_hpt_base(cpu);
curaddr < (ppc_hash32_hpt_base(cpu)
+ ppc_hash32_hpt_mask(cpu) + 0x80);
curaddr += 16) {
a0 = ldl_phys(cs->as, curaddr);
a1 = ldl_phys(cs->as, curaddr + 4);
a2 = ldl_phys(cs->as, curaddr + 8);
a3 = ldl_phys(cs->as, 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 {
qemu_log_mask(CPU_LOG_MMU, "No access allowed\n");
ret = -3;
}
} else {
target_ulong sr;
qemu_log_mask(CPU_LOG_MMU, "direct store...\n");
/* Direct-store segment : absolutely *BUGGY* for now */
/*
* Direct-store implies a 32-bit MMU.
* Check the Segment Register's bus unit ID (BUID).
*/
sr = env->sr[eaddr >> 28];
if ((sr & 0x1FF00000) >> 20 == 0x07f) {
/*
* Memory-forced I/O controller interface access
*
* If T=1 and BUID=x'07F', the 601 performs a memory
* access to SR[28-31] LA[4-31], bypassing all protection
* mechanisms.
*/
ctx->raddr = ((sr & 0xF) << 28) | (eaddr & 0x0FFFFFFF);
ctx->prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
return 0;
}
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:
qemu_log_mask(CPU_LOG_MMU, "ERROR: instruction should not need "
"address translation\n");
return -4;
}
if ((access_type == MMU_DATA_STORE || ctx->key != 1) &&
(access_type == MMU_DATA_LOAD || ctx->key != 0)) {
ctx->raddr = eaddr;
ret = 2;
} else {
ret = -2;
}
}
return ret;
}
/* Generic TLB check function for embedded PowerPC implementations */
int ppcemb_tlb_check(CPUPPCState *env, ppcemb_tlb_t *tlb,
hwaddr *raddrp,
target_ulong address, uint32_t pid, int ext,
int i)
{
target_ulong mask;
/* Check valid flag */
if (!(tlb->prot & PAGE_VALID)) {
return -1;
}
mask = ~(tlb->size - 1);
LOG_SWTLB("%s: TLB %d address " TARGET_FMT_lx " PID %u <=> " TARGET_FMT_lx
" " TARGET_FMT_lx " %u %x\n", __func__, i, address, pid, tlb->EPN,
mask, (uint32_t)tlb->PID, tlb->prot);
/* Check PID */
if (tlb->PID != 0 && tlb->PID != pid) {
return -1;
}
/* Check effective address */
if ((address & mask) != tlb->EPN) {
return -1;
}
*raddrp = (tlb->RPN & mask) | (address & ~mask);
if (ext) {
/* Extend the physical address to 36 bits */
*raddrp |= (uint64_t)(tlb->RPN & 0xF) << 32;
}
return 0;
}
static int mmu40x_get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx,
target_ulong address,
MMUAccessType access_type)
{
ppcemb_tlb_t *tlb;
hwaddr raddr;
int i, ret, zsel, zpr, pr;
ret = -1;
raddr = (hwaddr)-1ULL;
pr = msr_pr;
for (i = 0; i < env->nb_tlb; i++) {
tlb = &env->tlb.tlbe[i];
if (ppcemb_tlb_check(env, tlb, &raddr, address,
env->spr[SPR_40x_PID], 0, i) < 0) {
continue;
}
zsel = (tlb->attr >> 4) & 0xF;
zpr = (env->spr[SPR_40x_ZPR] >> (30 - (2 * zsel))) & 0x3;
LOG_SWTLB("%s: TLB %d zsel %d zpr %d ty %d attr %08x\n",
__func__, i, zsel, zpr, access_type, tlb->attr);
/* Check execute enable bit */
switch (zpr) {
case 0x2:
if (pr != 0) {
goto check_perms;
}
/* fall through */
case 0x3:
/* All accesses granted */
ctx->prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
ret = 0;
break;
case 0x0:
if (pr != 0) {
/* Raise Zone protection fault. */
env->spr[SPR_40x_ESR] = 1 << 22;
ctx->prot = 0;
ret = -2;
break;
}
/* fall through */
case 0x1:
check_perms:
/* Check from TLB entry */
ctx->prot = tlb->prot;
ret = check_prot(ctx->prot, access_type);
if (ret == -2) {
env->spr[SPR_40x_ESR] = 0;
}
break;
}
if (ret >= 0) {
ctx->raddr = raddr;
LOG_SWTLB("%s: access granted " TARGET_FMT_lx " => " TARGET_FMT_plx
" %d %d\n", __func__, address, ctx->raddr, ctx->prot,
ret);
return 0;
}
}
LOG_SWTLB("%s: access refused " TARGET_FMT_lx " => " TARGET_FMT_plx
" %d %d\n", __func__, address, raddr, ctx->prot, ret);
return ret;
}
static int mmubooke_check_tlb(CPUPPCState *env, ppcemb_tlb_t *tlb,
hwaddr *raddr, int *prot, target_ulong address,
MMUAccessType access_type, int i)
{
int prot2;
if (ppcemb_tlb_check(env, tlb, raddr, address,
env->spr[SPR_BOOKE_PID],
!env->nb_pids, i) >= 0) {
goto found_tlb;
}
if (env->spr[SPR_BOOKE_PID1] &&
ppcemb_tlb_check(env, tlb, raddr, address,
env->spr[SPR_BOOKE_PID1], 0, i) >= 0) {
goto found_tlb;
}
if (env->spr[SPR_BOOKE_PID2] &&
ppcemb_tlb_check(env, tlb, raddr, address,
env->spr[SPR_BOOKE_PID2], 0, i) >= 0) {
goto found_tlb;
}
LOG_SWTLB("%s: TLB entry not found\n", __func__);
return -1;
found_tlb:
if (msr_pr != 0) {
prot2 = tlb->prot & 0xF;
} else {
prot2 = (tlb->prot >> 4) & 0xF;
}
/* Check the address space */
if ((access_type == MMU_INST_FETCH ? msr_ir : msr_dr) != (tlb->attr & 1)) {
LOG_SWTLB("%s: AS doesn't match\n", __func__);
return -1;
}
*prot = prot2;
if (prot2 & prot_for_access_type(access_type)) {
LOG_SWTLB("%s: good TLB!\n", __func__);
return 0;
}
LOG_SWTLB("%s: no prot match: %x\n", __func__, prot2);
return access_type == MMU_INST_FETCH ? -3 : -2;
}
static int mmubooke_get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx,
target_ulong address,
MMUAccessType access_type)
{
ppcemb_tlb_t *tlb;
hwaddr raddr;
int i, ret;
ret = -1;
raddr = (hwaddr)-1ULL;
for (i = 0; i < env->nb_tlb; i++) {
tlb = &env->tlb.tlbe[i];
ret = mmubooke_check_tlb(env, tlb, &raddr, &ctx->prot, address,
access_type, i);
if (ret != -1) {
break;
}
}
if (ret >= 0) {
ctx->raddr = raddr;
LOG_SWTLB("%s: access granted " TARGET_FMT_lx " => " TARGET_FMT_plx
" %d %d\n", __func__, address, ctx->raddr, ctx->prot,
ret);
} else {
LOG_SWTLB("%s: access refused " TARGET_FMT_lx " => " TARGET_FMT_plx
" %d %d\n", __func__, address, raddr, ctx->prot, ret);
}
return ret;
}
hwaddr booke206_tlb_to_page_size(CPUPPCState *env,
ppcmas_tlb_t *tlb)
{
int tlbm_size;
tlbm_size = (tlb->mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT;
return 1024ULL << tlbm_size;
}
/* TLB check function for MAS based SoftTLBs */
int ppcmas_tlb_check(CPUPPCState *env, ppcmas_tlb_t *tlb,
hwaddr *raddrp, target_ulong address,
uint32_t pid)
{
hwaddr mask;
uint32_t tlb_pid;
if (!msr_cm) {
/* In 32bit mode we can only address 32bit EAs */
address = (uint32_t)address;
}
/* Check valid flag */
if (!(tlb->mas1 & MAS1_VALID)) {
return -1;
}
mask = ~(booke206_tlb_to_page_size(env, tlb) - 1);
LOG_SWTLB("%s: TLB ADDR=0x" TARGET_FMT_lx " PID=0x%x MAS1=0x%x MAS2=0x%"
PRIx64 " mask=0x%" HWADDR_PRIx " MAS7_3=0x%" PRIx64 " MAS8=0x%"
PRIx32 "\n", __func__, address, pid, tlb->mas1, tlb->mas2, mask,
tlb->mas7_3, tlb->mas8);
/* Check PID */
tlb_pid = (tlb->mas1 & MAS1_TID_MASK) >> MAS1_TID_SHIFT;
if (tlb_pid != 0 && tlb_pid != pid) {
return -1;
}
/* Check effective address */
if ((address & mask) != (tlb->mas2 & MAS2_EPN_MASK)) {
return -1;
}
if (raddrp) {
*raddrp = (tlb->mas7_3 & mask) | (address & ~mask);
}
return 0;
}
static bool is_epid_mmu(int mmu_idx)
{
return mmu_idx == PPC_TLB_EPID_STORE || mmu_idx == PPC_TLB_EPID_LOAD;
}
static uint32_t mmubooke206_esr(int mmu_idx, MMUAccessType access_type)
{
uint32_t esr = 0;
if (access_type == MMU_DATA_STORE) {
esr |= ESR_ST;
}
if (is_epid_mmu(mmu_idx)) {
esr |= ESR_EPID;
}
return esr;
}
/*
* Get EPID register given the mmu_idx. If this is regular load,
* construct the EPID access bits from current processor state
*
* Get the effective AS and PR bits and the PID. The PID is returned
* only if EPID load is requested, otherwise the caller must detect
* the correct EPID. Return true if valid EPID is returned.
*/
static bool mmubooke206_get_as(CPUPPCState *env,
int mmu_idx, uint32_t *epid_out,
bool *as_out, bool *pr_out)
{
if (is_epid_mmu(mmu_idx)) {
uint32_t epidr;
if (mmu_idx == PPC_TLB_EPID_STORE) {
epidr = env->spr[SPR_BOOKE_EPSC];
} else {
epidr = env->spr[SPR_BOOKE_EPLC];
}
*epid_out = (epidr & EPID_EPID) >> EPID_EPID_SHIFT;
*as_out = !!(epidr & EPID_EAS);
*pr_out = !!(epidr & EPID_EPR);
return true;
} else {
*as_out = msr_ds;
*pr_out = msr_pr;
return false;
}
}
/* Check if the tlb found by hashing really matches */
static int mmubooke206_check_tlb(CPUPPCState *env, ppcmas_tlb_t *tlb,
hwaddr *raddr, int *prot,
target_ulong address,
MMUAccessType access_type, int mmu_idx)
{
int prot2 = 0;
uint32_t epid;
bool as, pr;
bool use_epid = mmubooke206_get_as(env, mmu_idx, &epid, &as, &pr);
if (!use_epid) {
if (ppcmas_tlb_check(env, tlb, raddr, address,
env->spr[SPR_BOOKE_PID]) >= 0) {
goto found_tlb;
}
if (env->spr[SPR_BOOKE_PID1] &&
ppcmas_tlb_check(env, tlb, raddr, address,
env->spr[SPR_BOOKE_PID1]) >= 0) {
goto found_tlb;
}
if (env->spr[SPR_BOOKE_PID2] &&
ppcmas_tlb_check(env, tlb, raddr, address,
env->spr[SPR_BOOKE_PID2]) >= 0) {
goto found_tlb;
}
} else {
if (ppcmas_tlb_check(env, tlb, raddr, address, epid) >= 0) {
goto found_tlb;
}
}
LOG_SWTLB("%s: TLB entry not found\n", __func__);
return -1;
found_tlb:
if (pr) {
if (tlb->mas7_3 & MAS3_UR) {
prot2 |= PAGE_READ;
}
if (tlb->mas7_3 & MAS3_UW) {
prot2 |= PAGE_WRITE;
}
if (tlb->mas7_3 & MAS3_UX) {
prot2 |= PAGE_EXEC;
}
} else {
if (tlb->mas7_3 & MAS3_SR) {
prot2 |= PAGE_READ;
}
if (tlb->mas7_3 & MAS3_SW) {
prot2 |= PAGE_WRITE;
}
if (tlb->mas7_3 & MAS3_SX) {
prot2 |= PAGE_EXEC;
}
}
/* Check the address space and permissions */
if (access_type == MMU_INST_FETCH) {
/* There is no way to fetch code using epid load */
assert(!use_epid);
as = msr_ir;
}
if (as != ((tlb->mas1 & MAS1_TS) >> MAS1_TS_SHIFT)) {
LOG_SWTLB("%s: AS doesn't match\n", __func__);
return -1;
}
*prot = prot2;
if (prot2 & prot_for_access_type(access_type)) {
LOG_SWTLB("%s: good TLB!\n", __func__);
return 0;
}
LOG_SWTLB("%s: no prot match: %x\n", __func__, prot2);
return access_type == MMU_INST_FETCH ? -3 : -2;
}
static int mmubooke206_get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx,
target_ulong address,
MMUAccessType access_type,
int mmu_idx)
{
ppcmas_tlb_t *tlb;
hwaddr raddr;
int i, j, ret;
ret = -1;
raddr = (hwaddr)-1ULL;
for (i = 0; i < BOOKE206_MAX_TLBN; i++) {
int ways = booke206_tlb_ways(env, i);
for (j = 0; j < ways; j++) {
tlb = booke206_get_tlbm(env, i, address, j);
if (!tlb) {
continue;
}
ret = mmubooke206_check_tlb(env, tlb, &raddr, &ctx->prot, address,
access_type, mmu_idx);
if (ret != -1) {
goto found_tlb;
}
}
}
found_tlb:
if (ret >= 0) {
ctx->raddr = raddr;
LOG_SWTLB("%s: access granted " TARGET_FMT_lx " => " TARGET_FMT_plx
" %d %d\n", __func__, address, ctx->raddr, ctx->prot,
ret);
} else {
LOG_SWTLB("%s: access refused " TARGET_FMT_lx " => " TARGET_FMT_plx
" %d %d\n", __func__, address, raddr, ctx->prot, ret);
}
return ret;
}
static const char *book3e_tsize_to_str[32] = {
"1K", "2K", "4K", "8K", "16K", "32K", "64K", "128K", "256K", "512K",
"1M", "2M", "4M", "8M", "16M", "32M", "64M", "128M", "256M", "512M",
"1G", "2G", "4G", "8G", "16G", "32G", "64G", "128G", "256G", "512G",
"1T", "2T"
};
static void mmubooke_dump_mmu(CPUPPCState *env)
{
ppcemb_tlb_t *entry;
int i;
if (kvm_enabled() && !env->kvm_sw_tlb) {
qemu_printf("Cannot access KVM TLB\n");
return;
}
qemu_printf("\nTLB:\n");
qemu_printf("Effective Physical Size PID Prot "
"Attr\n");
entry = &env->tlb.tlbe[0];
for (i = 0; i < env->nb_tlb; i++, entry++) {
hwaddr ea, pa;
target_ulong mask;
uint64_t size = (uint64_t)entry->size;
char size_buf[20];
/* Check valid flag */
if (!(entry->prot & PAGE_VALID)) {
continue;
}
mask = ~(entry->size - 1);
ea = entry->EPN & mask;
pa = entry->RPN & mask;
/* Extend the physical address to 36 bits */
pa |= (hwaddr)(entry->RPN & 0xF) << 32;
if (size >= 1 * MiB) {
snprintf(size_buf, sizeof(size_buf), "%3" PRId64 "M", size / MiB);
} else {
snprintf(size_buf, sizeof(size_buf), "%3" PRId64 "k", size / KiB);
}
qemu_printf("0x%016" PRIx64 " 0x%016" PRIx64 " %s %-5u %08x %08x\n",
(uint64_t)ea, (uint64_t)pa, size_buf, (uint32_t)entry->PID,
entry->prot, entry->attr);
}
}
static void mmubooke206_dump_one_tlb(CPUPPCState *env, int tlbn, int offset,
int tlbsize)
{
ppcmas_tlb_t *entry;
int i;
qemu_printf("\nTLB%d:\n", tlbn);
qemu_printf("Effective Physical Size TID TS SRWX"
" URWX WIMGE U0123\n");
entry = &env->tlb.tlbm[offset];
for (i = 0; i < tlbsize; i++, entry++) {
hwaddr ea, pa, size;
int tsize;
if (!(entry->mas1 & MAS1_VALID)) {
continue;
}
tsize = (entry->mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT;
size = 1024ULL << tsize;
ea = entry->mas2 & ~(size - 1);
pa = entry->mas7_3 & ~(size - 1);
qemu_printf("0x%016" PRIx64 " 0x%016" PRIx64 " %4s %-5u %1u S%c%c%c"
"U%c%c%c %c%c%c%c%c U%c%c%c%c\n",
(uint64_t)ea, (uint64_t)pa,
book3e_tsize_to_str[tsize],
(entry->mas1 & MAS1_TID_MASK) >> MAS1_TID_SHIFT,
(entry->mas1 & MAS1_TS) >> MAS1_TS_SHIFT,
entry->mas7_3 & MAS3_SR ? 'R' : '-',
entry->mas7_3 & MAS3_SW ? 'W' : '-',
entry->mas7_3 & MAS3_SX ? 'X' : '-',
entry->mas7_3 & MAS3_UR ? 'R' : '-',
entry->mas7_3 & MAS3_UW ? 'W' : '-',
entry->mas7_3 & MAS3_UX ? 'X' : '-',
entry->mas2 & MAS2_W ? 'W' : '-',
entry->mas2 & MAS2_I ? 'I' : '-',
entry->mas2 & MAS2_M ? 'M' : '-',
entry->mas2 & MAS2_G ? 'G' : '-',
entry->mas2 & MAS2_E ? 'E' : '-',
entry->mas7_3 & MAS3_U0 ? '0' : '-',
entry->mas7_3 & MAS3_U1 ? '1' : '-',
entry->mas7_3 & MAS3_U2 ? '2' : '-',
entry->mas7_3 & MAS3_U3 ? '3' : '-');
}
}
static void mmubooke206_dump_mmu(CPUPPCState *env)
{
int offset = 0;
int i;
if (kvm_enabled() && !env->kvm_sw_tlb) {
qemu_printf("Cannot access KVM TLB\n");
return;
}
for (i = 0; i < BOOKE206_MAX_TLBN; i++) {
int size = booke206_tlb_size(env, i);
if (size == 0) {
continue;
}
mmubooke206_dump_one_tlb(env, i, offset, size);
offset += size;
}
}
static void mmu6xx_dump_BATs(CPUPPCState *env, int type)
{
target_ulong *BATlt, *BATut, *BATu, *BATl;
target_ulong BEPIl, BEPIu, bl;
int i;
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;
bl = (*BATu & 0x00001FFC) << 15;
qemu_printf("%s BAT%d BATu " TARGET_FMT_lx
" BATl " TARGET_FMT_lx "\n\t" TARGET_FMT_lx " "
TARGET_FMT_lx " " TARGET_FMT_lx "\n",
type == ACCESS_CODE ? "code" : "data", i,
*BATu, *BATl, BEPIu, BEPIl, bl);
}
}
static void mmu6xx_dump_mmu(CPUPPCState *env)
{
PowerPCCPU *cpu = env_archcpu(env);
ppc6xx_tlb_t *tlb;
target_ulong sr;
int type, way, entry, i;
qemu_printf("HTAB base = 0x%"HWADDR_PRIx"\n", ppc_hash32_hpt_base(cpu));
qemu_printf("HTAB mask = 0x%"HWADDR_PRIx"\n", ppc_hash32_hpt_mask(cpu));
qemu_printf("\nSegment registers:\n");
for (i = 0; i < 32; i++) {
sr = env->sr[i];
if (sr & 0x80000000) {
qemu_printf("%02d T=%d Ks=%d Kp=%d BUID=0x%03x "
"CNTLR_SPEC=0x%05x\n", i,
sr & 0x80000000 ? 1 : 0, sr & 0x40000000 ? 1 : 0,
sr & 0x20000000 ? 1 : 0, (uint32_t)((sr >> 20) & 0x1FF),
(uint32_t)(sr & 0xFFFFF));
} else {
qemu_printf("%02d T=%d Ks=%d Kp=%d N=%d VSID=0x%06x\n", i,
sr & 0x80000000 ? 1 : 0, sr & 0x40000000 ? 1 : 0,
sr & 0x20000000 ? 1 : 0, sr & 0x10000000 ? 1 : 0,
(uint32_t)(sr & 0x00FFFFFF));
}
}
qemu_printf("\nBATs:\n");
mmu6xx_dump_BATs(env, ACCESS_INT);
mmu6xx_dump_BATs(env, ACCESS_CODE);
if (env->id_tlbs != 1) {
qemu_printf("ERROR: 6xx MMU should have separated TLB"
" for code and data\n");
}
qemu_printf("\nTLBs [EPN EPN + SIZE]\n");
for (type = 0; type < 2; type++) {
for (way = 0; way < env->nb_ways; way++) {
for (entry = env->nb_tlb * type + env->tlb_per_way * way;
entry < (env->nb_tlb * type + env->tlb_per_way * (way + 1));
entry++) {
tlb = &env->tlb.tlb6[entry];
qemu_printf("%s TLB %02d/%02d way:%d %s ["
TARGET_FMT_lx " " TARGET_FMT_lx "]\n",
type ? "code" : "data", entry % env->nb_tlb,
env->nb_tlb, way,
pte_is_valid(tlb->pte0) ? "valid" : "inval",
tlb->EPN, tlb->EPN + TARGET_PAGE_SIZE);
}
}
}
}
void dump_mmu(CPUPPCState *env)
{
switch (env->mmu_model) {
case POWERPC_MMU_BOOKE:
mmubooke_dump_mmu(env);
break;
case POWERPC_MMU_BOOKE206:
mmubooke206_dump_mmu(env);
break;
case POWERPC_MMU_SOFT_6xx:
mmu6xx_dump_mmu(env);
break;
#if defined(TARGET_PPC64)
case POWERPC_MMU_64B:
case POWERPC_MMU_2_03:
case POWERPC_MMU_2_06:
case POWERPC_MMU_2_07:
dump_slb(env_archcpu(env));
break;
case POWERPC_MMU_3_00:
if (ppc64_v3_radix(env_archcpu(env))) {
qemu_log_mask(LOG_UNIMP, "%s: the PPC64 MMU is unsupported\n",
__func__);
} else {
dump_slb(env_archcpu(env));
}
break;
#endif
default:
qemu_log_mask(LOG_UNIMP, "%s: unimplemented\n", __func__);
}
}
static int check_physical(CPUPPCState *env, mmu_ctx_t *ctx, target_ulong eaddr,
MMUAccessType access_type)
{
int in_plb, ret;
ctx->raddr = eaddr;
ctx->prot = PAGE_READ | PAGE_EXEC;
ret = 0;
switch (env->mmu_model) {
case POWERPC_MMU_SOFT_6xx:
case POWERPC_MMU_SOFT_4xx:
case POWERPC_MMU_REAL:
case POWERPC_MMU_BOOKE:
ctx->prot |= PAGE_WRITE;
break;
case POWERPC_MMU_SOFT_4xx_Z:
if (unlikely(msr_pe != 0)) {
/*
* 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 (access_type == MMU_DATA_STORE) {
/* Access is not allowed */
ret = -2;
}
} else {
/* Read-write access is allowed */
ctx->prot |= PAGE_WRITE;
}
}
break;
default:
/* Caller's checks mean we should never get here for other models */
abort();
return -1;
}
return ret;
}
int get_physical_address_wtlb(CPUPPCState *env, mmu_ctx_t *ctx,
target_ulong eaddr,
MMUAccessType access_type, int type,
int mmu_idx)
{
int ret = -1;
bool real_mode = (type == ACCESS_CODE && msr_ir == 0)
|| (type != ACCESS_CODE && msr_dr == 0);
switch (env->mmu_model) {
case POWERPC_MMU_SOFT_6xx:
if (real_mode) {
ret = check_physical(env, ctx, eaddr, access_type);
} else {
/* Try to find a BAT */
if (env->nb_BATs != 0) {
ret = get_bat_6xx_tlb(env, ctx, eaddr, access_type);
}
if (ret < 0) {
/* We didn't match any BAT entry or don't have BATs */
ret = get_segment_6xx_tlb(env, ctx, eaddr, access_type, type);
}
}
break;
case POWERPC_MMU_SOFT_4xx:
case POWERPC_MMU_SOFT_4xx_Z:
if (real_mode) {
ret = check_physical(env, ctx, eaddr, access_type);
} else {
ret = mmu40x_get_physical_address(env, ctx, eaddr, access_type);
}
break;
case POWERPC_MMU_BOOKE:
ret = mmubooke_get_physical_address(env, ctx, eaddr, access_type);
break;
case POWERPC_MMU_BOOKE206:
ret = mmubooke206_get_physical_address(env, ctx, eaddr, access_type,
mmu_idx);
break;
case POWERPC_MMU_MPC8xx:
/* XXX: TODO */
cpu_abort(env_cpu(env), "MPC8xx MMU model is not implemented\n");
break;
case POWERPC_MMU_REAL:
if (real_mode) {
ret = check_physical(env, ctx, eaddr, access_type);
} else {
cpu_abort(env_cpu(env),
"PowerPC in real mode do not do any translation\n");
}
return -1;
default:
cpu_abort(env_cpu(env), "Unknown or invalid MMU model\n");
return -1;
}
return ret;
}
static void booke206_update_mas_tlb_miss(CPUPPCState *env, target_ulong address,
MMUAccessType access_type, int mmu_idx)
{
uint32_t epid;
bool as, pr;
uint32_t missed_tid = 0;
bool use_epid = mmubooke206_get_as(env, mmu_idx, &epid, &as, &pr);
if (access_type == MMU_INST_FETCH) {
as = msr_ir;
}
env->spr[SPR_BOOKE_MAS0] = env->spr[SPR_BOOKE_MAS4] & MAS4_TLBSELD_MASK;
env->spr[SPR_BOOKE_MAS1] = env->spr[SPR_BOOKE_MAS4] & MAS4_TSIZED_MASK;
env->spr[SPR_BOOKE_MAS2] = env->spr[SPR_BOOKE_MAS4] & MAS4_WIMGED_MASK;
env->spr[SPR_BOOKE_MAS3] = 0;
env->spr[SPR_BOOKE_MAS6] = 0;
env->spr[SPR_BOOKE_MAS7] = 0;
/* AS */
if (as) {
env->spr[SPR_BOOKE_MAS1] |= MAS1_TS;
env->spr[SPR_BOOKE_MAS6] |= MAS6_SAS;
}
env->spr[SPR_BOOKE_MAS1] |= MAS1_VALID;
env->spr[SPR_BOOKE_MAS2] |= address & MAS2_EPN_MASK;
if (!use_epid) {
switch (env->spr[SPR_BOOKE_MAS4] & MAS4_TIDSELD_PIDZ) {
case MAS4_TIDSELD_PID0:
missed_tid = env->spr[SPR_BOOKE_PID];
break;
case MAS4_TIDSELD_PID1:
missed_tid = env->spr[SPR_BOOKE_PID1];
break;
case MAS4_TIDSELD_PID2:
missed_tid = env->spr[SPR_BOOKE_PID2];
break;
}
env->spr[SPR_BOOKE_MAS6] |= env->spr[SPR_BOOKE_PID] << 16;
} else {
missed_tid = epid;
env->spr[SPR_BOOKE_MAS6] |= missed_tid << 16;
}
env->spr[SPR_BOOKE_MAS1] |= (missed_tid << MAS1_TID_SHIFT);
/* next victim logic */
env->spr[SPR_BOOKE_MAS0] |= env->last_way << MAS0_ESEL_SHIFT;
env->last_way++;
env->last_way &= booke206_tlb_ways(env, 0) - 1;
env->spr[SPR_BOOKE_MAS0] |= env->last_way << MAS0_NV_SHIFT;
}
/* Perform address translation */
/* TODO: Split this by mmu_model. */
static bool ppc_jumbo_xlate(PowerPCCPU *cpu, vaddr eaddr,
MMUAccessType access_type,
hwaddr *raddrp, int *psizep, int *protp,
int mmu_idx, bool guest_visible)
{
CPUState *cs = CPU(cpu);
CPUPPCState *env = &cpu->env;
mmu_ctx_t ctx;
int type;
int ret;
if (access_type == MMU_INST_FETCH) {
/* code access */
type = ACCESS_CODE;
} else if (guest_visible) {
/* data access */
type = env->access_type;
} else {
type = ACCESS_INT;
}
ret = get_physical_address_wtlb(env, &ctx, eaddr, access_type,
type, mmu_idx);
if (ret == 0) {
*raddrp = ctx.raddr;
*protp = ctx.prot;
*psizep = TARGET_PAGE_BITS;
return true;
}
if (guest_visible) {
LOG_MMU_STATE(cs);
if (type == ACCESS_CODE) {
switch (ret) {
case -1:
/* No matches in page tables or TLB */
switch (env->mmu_model) {
case POWERPC_MMU_SOFT_6xx:
cs->exception_index = POWERPC_EXCP_IFTLB;
env->error_code = 1 << 18;
env->spr[SPR_IMISS] = eaddr;
env->spr[SPR_ICMP] = 0x80000000 | ctx.ptem;
goto tlb_miss;
case POWERPC_MMU_SOFT_4xx:
case POWERPC_MMU_SOFT_4xx_Z:
cs->exception_index = POWERPC_EXCP_ITLB;
env->error_code = 0;
env->spr[SPR_40x_DEAR] = eaddr;
env->spr[SPR_40x_ESR] = 0x00000000;
break;
case POWERPC_MMU_BOOKE206:
booke206_update_mas_tlb_miss(env, eaddr, 2, mmu_idx);
/* fall through */
case POWERPC_MMU_BOOKE:
cs->exception_index = POWERPC_EXCP_ITLB;
env->error_code = 0;
env->spr[SPR_BOOKE_DEAR] = eaddr;
env->spr[SPR_BOOKE_ESR] = mmubooke206_esr(mmu_idx, MMU_DATA_LOAD);
break;
case POWERPC_MMU_MPC8xx:
cpu_abort(cs, "MPC8xx MMU model is not implemented\n");
case POWERPC_MMU_REAL:
cpu_abort(cs, "PowerPC in real mode should never raise "
"any MMU exceptions\n");
default:
cpu_abort(cs, "Unknown or invalid MMU model\n");
}
break;
case -2:
/* Access rights violation */
cs->exception_index = POWERPC_EXCP_ISI;
env->error_code = 0x08000000;
break;
case -3:
/* No execute protection violation */
if ((env->mmu_model == POWERPC_MMU_BOOKE) ||
(env->mmu_model == POWERPC_MMU_BOOKE206)) {
env->spr[SPR_BOOKE_ESR] = 0x00000000;
}
cs->exception_index = POWERPC_EXCP_ISI;
env->error_code = 0x10000000;
break;
case -4:
/* Direct store exception */
/* No code fetch is allowed in direct-store areas */
cs->exception_index = POWERPC_EXCP_ISI;
env->error_code = 0x10000000;
break;
}
} else {
switch (ret) {
case -1:
/* No matches in page tables or TLB */
switch (env->mmu_model) {
case POWERPC_MMU_SOFT_6xx:
if (access_type == MMU_DATA_STORE) {
cs->exception_index = POWERPC_EXCP_DSTLB;
env->error_code = 1 << 16;
} else {
cs->exception_index = POWERPC_EXCP_DLTLB;
env->error_code = 0;
}
env->spr[SPR_DMISS] = eaddr;
env->spr[SPR_DCMP] = 0x80000000 | ctx.ptem;
tlb_miss:
env->error_code |= ctx.key << 19;
env->spr[SPR_HASH1] = ppc_hash32_hpt_base(cpu) +
get_pteg_offset32(cpu, ctx.hash[0]);
env->spr[SPR_HASH2] = ppc_hash32_hpt_base(cpu) +
get_pteg_offset32(cpu, ctx.hash[1]);
break;
case POWERPC_MMU_SOFT_4xx:
case POWERPC_MMU_SOFT_4xx_Z:
cs->exception_index = POWERPC_EXCP_DTLB;
env->error_code = 0;
env->spr[SPR_40x_DEAR] = eaddr;
if (access_type == MMU_DATA_STORE) {
env->spr[SPR_40x_ESR] = 0x00800000;
} else {
env->spr[SPR_40x_ESR] = 0x00000000;
}
break;
case POWERPC_MMU_MPC8xx:
/* XXX: TODO */
cpu_abort(cs, "MPC8xx MMU model is not implemented\n");
case POWERPC_MMU_BOOKE206:
booke206_update_mas_tlb_miss(env, eaddr, access_type, mmu_idx);
/* fall through */
case POWERPC_MMU_BOOKE:
cs->exception_index = POWERPC_EXCP_DTLB;
env->error_code = 0;
env->spr[SPR_BOOKE_DEAR] = eaddr;
env->spr[SPR_BOOKE_ESR] = mmubooke206_esr(mmu_idx, access_type);
break;
case POWERPC_MMU_REAL:
cpu_abort(cs, "PowerPC in real mode should never raise "
"any MMU exceptions\n");
default:
cpu_abort(cs, "Unknown or invalid MMU model\n");
}
break;
case -2:
/* Access rights violation */
cs->exception_index = POWERPC_EXCP_DSI;
env->error_code = 0;
if (env->mmu_model == POWERPC_MMU_SOFT_4xx
|| env->mmu_model == POWERPC_MMU_SOFT_4xx_Z) {
env->spr[SPR_40x_DEAR] = eaddr;
if (access_type == MMU_DATA_STORE) {
env->spr[SPR_40x_ESR] |= 0x00800000;
}
} else if ((env->mmu_model == POWERPC_MMU_BOOKE) ||
(env->mmu_model == POWERPC_MMU_BOOKE206)) {
env->spr[SPR_BOOKE_DEAR] = eaddr;
env->spr[SPR_BOOKE_ESR] = mmubooke206_esr(mmu_idx, access_type);
} else {
env->spr[SPR_DAR] = eaddr;
if (access_type == MMU_DATA_STORE) {
env->spr[SPR_DSISR] = 0x0A000000;
} else {
env->spr[SPR_DSISR] = 0x08000000;
}
}
break;
case -4:
/* Direct store exception */
switch (type) {
case ACCESS_FLOAT:
/* Floating point load/store */
cs->exception_index = POWERPC_EXCP_ALIGN;
env->error_code = POWERPC_EXCP_ALIGN_FP;
env->spr[SPR_DAR] = eaddr;
break;
case ACCESS_RES:
/* lwarx, ldarx or stwcx. */
cs->exception_index = POWERPC_EXCP_DSI;
env->error_code = 0;
env->spr[SPR_DAR] = eaddr;
if (access_type == MMU_DATA_STORE) {
env->spr[SPR_DSISR] = 0x06000000;
} else {
env->spr[SPR_DSISR] = 0x04000000;
}
break;
case ACCESS_EXT:
/* eciwx or ecowx */
cs->exception_index = POWERPC_EXCP_DSI;
env->error_code = 0;
env->spr[SPR_DAR] = eaddr;
if (access_type == MMU_DATA_STORE) {
env->spr[SPR_DSISR] = 0x06100000;
} else {
env->spr[SPR_DSISR] = 0x04100000;
}
break;
default:
printf("DSI: invalid exception (%d)\n", ret);
cs->exception_index = POWERPC_EXCP_PROGRAM;
env->error_code =
POWERPC_EXCP_INVAL | POWERPC_EXCP_INVAL_INVAL;
env->spr[SPR_DAR] = eaddr;
break;
}
break;
}
}
}
return false;
}
/*****************************************************************************/
bool ppc_xlate(PowerPCCPU *cpu, vaddr eaddr, MMUAccessType access_type,
hwaddr *raddrp, int *psizep, int *protp,
int mmu_idx, bool guest_visible)
{
switch (cpu->env.mmu_model) {
#if defined(TARGET_PPC64)
case POWERPC_MMU_3_00:
if (ppc64_v3_radix(cpu)) {
return ppc_radix64_xlate(cpu, eaddr, access_type, raddrp,
psizep, protp, mmu_idx, guest_visible);
}
/* fall through */
case POWERPC_MMU_64B:
case POWERPC_MMU_2_03:
case POWERPC_MMU_2_06:
case POWERPC_MMU_2_07:
return ppc_hash64_xlate(cpu, eaddr, access_type,
raddrp, psizep, protp, mmu_idx, guest_visible);
#endif
case POWERPC_MMU_32B:
case POWERPC_MMU_601:
return ppc_hash32_xlate(cpu, eaddr, access_type, raddrp,
psizep, protp, mmu_idx, guest_visible);
default:
return ppc_jumbo_xlate(cpu, eaddr, access_type, raddrp,
psizep, protp, mmu_idx, guest_visible);
}
}
hwaddr ppc_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
{
PowerPCCPU *cpu = POWERPC_CPU(cs);
hwaddr raddr;
int s, p;
/*
* Some MMUs have separate TLBs for code and data. If we only
* try an MMU_DATA_LOAD, we may not be able to read instructions
* mapped by code TLBs, so we also try a MMU_INST_FETCH.
*/
if (ppc_xlate(cpu, addr, MMU_DATA_LOAD, &raddr, &s, &p,
cpu_mmu_index(&cpu->env, false), false) ||
ppc_xlate(cpu, addr, MMU_INST_FETCH, &raddr, &s, &p,
cpu_mmu_index(&cpu->env, true), false)) {
return raddr & TARGET_PAGE_MASK;
}
return -1;
}
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