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qemu-e2k/target-ppc/mmu_helper.c
David Gibson b632a148b6 target-ppc: Use QOM method dispatch for MMU fault handling 
After previous cleanups, the many scattered checks of env->mmu_model in
the ppc MMU implementation have, at least for "classic" hash MMUs been
reduced (almost) to a single switch at the top of
cpu_ppc_handle_mmu_fault().

An explicit switch is still a pretty ugly way of handling this though.  Now
that Andreas Färber's CPU QOM cleanups for ppc have gone in, it's quite
straightforward to instead make the handle_mmu_fault function a QOM method
on the CPU object.

This patch implements such a scheme, initializing the method pointer at
the same time as the mmu_model variable.  We need to keep the latter around
for now, because of the MMU types (BookE, 4xx, et al) which haven't been
converted to the new scheme yet, and also for a few other uses.  It would
be good to clean those up eventually.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>
2013-03-22 15:28:53 +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 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 "cpu.h"
#include "helper.h"
#include "sysemu/kvm.h"
#include "kvm_ppc.h"
#include "mmu-hash64.h"
#include "mmu-hash32.h"
//#define DEBUG_MMU
//#define DEBUG_BATS
//#define DEBUG_SOFTWARE_TLB
//#define DUMP_PAGE_TABLES
//#define DEBUG_SOFTWARE_TLB
//#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
/*****************************************************************************/
/* PowerPC MMU emulation */
/* Context used internally during MMU translations */
typedef struct mmu_ctx_t mmu_ctx_t;
struct mmu_ctx_t {
hwaddr raddr; /* Real address */
hwaddr eaddr; /* Effective address */
int prot; /* Protection bits */
hwaddr hash[2]; /* Pagetable hash values */
target_ulong ptem; /* Virtual segment ID | API */
int key; /* Access key */
int nx; /* Non-execute area */
};
/* 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 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;
/* No break here */
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, 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 ppc6xx_tlb_pte_check(mmu_ctx_t *ctx, 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 */
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("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 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(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 inline void ppc6xx_tlb_invalidate_all(CPUPPCState *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.tlb6[nr];
pte_invalidate(&tlb->pte0);
}
tlb_flush(env, 1);
}
static inline void ppc6xx_tlb_invalidate_virt2(CPUPPCState *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.tlb6[nr];
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(CPUPPCState *env,
target_ulong eaddr, int is_code)
{
ppc6xx_tlb_invalidate_virt2(env, eaddr, is_code, 0);
}
static void ppc6xx_tlb_store(CPUPPCState *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.tlb6[nr];
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_virt2(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(CPUPPCState *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.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,
rw ? 'S' : 'L', access_type == ACCESS_CODE ? 'I' : 'D');
switch (ppc6xx_tlb_pte_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.tlb6[best].pte1, ret, rw);
}
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, 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;
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;
}
/* Perform segment based translation */
static inline int get_segment_6xx_tlb(CPUPPCState *env, mmu_ctx_t *ctx,
target_ulong eaddr, int rw, int type)
{
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;
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);
pgidx = (eaddr & ~SEGMENT_MASK_256M) >> target_page_bits;
hash = vsid ^ pgidx;
ctx->ptem = (vsid << 7) | (pgidx >> 10);
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 */
LOG_MMU("htab_base " TARGET_FMT_plx " htab_mask " TARGET_FMT_plx
" hash " TARGET_FMT_plx "\n",
env->htab_base, env->htab_mask, 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, rw, type);
#if defined(DUMP_PAGE_TABLES)
if (qemu_log_enabled()) {
hwaddr 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;
}
} else {
target_ulong sr;
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("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;
}
/* Generic TLB check function for embedded PowerPC implementations */
static 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;
}
/* Generic TLB search function for PowerPC embedded implementations */
static int ppcemb_tlb_search(CPUPPCState *env, target_ulong address,
uint32_t pid)
{
ppcemb_tlb_t *tlb;
hwaddr raddr;
int i, ret;
/* Default return value is no match */
ret = -1;
for (i = 0; i < env->nb_tlb; i++) {
tlb = &env->tlb.tlbe[i];
if (ppcemb_tlb_check(env, tlb, &raddr, address, pid, 0, i) == 0) {
ret = i;
break;
}
}
return ret;
}
/* Helpers specific to PowerPC 40x implementations */
static inline void ppc4xx_tlb_invalidate_all(CPUPPCState *env)
{
ppcemb_tlb_t *tlb;
int i;
for (i = 0; i < env->nb_tlb; i++) {
tlb = &env->tlb.tlbe[i];
tlb->prot &= ~PAGE_VALID;
}
tlb_flush(env, 1);
}
static inline void ppc4xx_tlb_invalidate_virt(CPUPPCState *env,
target_ulong eaddr, uint32_t pid)
{
#if !defined(FLUSH_ALL_TLBS)
ppcemb_tlb_t *tlb;
hwaddr raddr;
target_ulong page, end;
int i;
for (i = 0; i < env->nb_tlb; i++) {
tlb = &env->tlb.tlbe[i];
if (ppcemb_tlb_check(env, tlb, &raddr, eaddr, pid, 0, i) == 0) {
end = tlb->EPN + tlb->size;
for (page = tlb->EPN; page < end; page += TARGET_PAGE_SIZE) {
tlb_flush_page(env, page);
}
tlb->prot &= ~PAGE_VALID;
break;
}
}
#else
ppc4xx_tlb_invalidate_all(env);
#endif
}
static int mmu40x_get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx,
target_ulong address, int rw,
int 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 rw %d attr %08x\n",
__func__, i, zsel, zpr, rw, tlb->attr);
/* Check execute enable bit */
switch (zpr) {
case 0x2:
if (pr != 0) {
goto check_perms;
}
/* No break here */
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;
}
/* No break here */
case 0x1:
check_perms:
/* Check from TLB entry */
ctx->prot = tlb->prot;
ret = check_prot(ctx->prot, rw, 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;
}
void store_40x_sler(CPUPPCState *env, uint32_t val)
{
/* XXX: TO BE FIXED */
if (val != 0x00000000) {
cpu_abort(env, "Little-endian regions are not supported by now\n");
}
env->spr[SPR_405_SLER] = val;
}
static inline int mmubooke_check_tlb(CPUPPCState *env, ppcemb_tlb_t *tlb,
hwaddr *raddr, int *prot,
target_ulong address, int rw,
int access_type, int i)
{
int ret, 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 == ACCESS_CODE) {
if (msr_ir != (tlb->attr & 1)) {
LOG_SWTLB("%s: AS doesn't match\n", __func__);
return -1;
}
*prot = prot2;
if (prot2 & PAGE_EXEC) {
LOG_SWTLB("%s: good TLB!\n", __func__);
return 0;
}
LOG_SWTLB("%s: no PAGE_EXEC: %x\n", __func__, prot2);
ret = -3;
} else {
if (msr_dr != (tlb->attr & 1)) {
LOG_SWTLB("%s: AS doesn't match\n", __func__);
return -1;
}
*prot = prot2;
if ((!rw && prot2 & PAGE_READ) || (rw && (prot2 & PAGE_WRITE))) {
LOG_SWTLB("%s: found TLB!\n", __func__);
return 0;
}
LOG_SWTLB("%s: PAGE_READ/WRITE doesn't match: %x\n", __func__, prot2);
ret = -2;
}
return ret;
}
static int mmubooke_get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx,
target_ulong address, int rw,
int 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, rw,
access_type, i);
if (!ret) {
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;
}
static void booke206_flush_tlb(CPUPPCState *env, int flags,
const int check_iprot)
{
int tlb_size;
int i, j;
ppcmas_tlb_t *tlb = env->tlb.tlbm;
for (i = 0; i < BOOKE206_MAX_TLBN; i++) {
if (flags & (1 << i)) {
tlb_size = booke206_tlb_size(env, i);
for (j = 0; j < tlb_size; j++) {
if (!check_iprot || !(tlb[j].mas1 & MAS1_IPROT)) {
tlb[j].mas1 &= ~MAS1_VALID;
}
}
}
tlb += booke206_tlb_size(env, i);
}
tlb_flush(env, 1);
}
static 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 */
static int ppcmas_tlb_check(CPUPPCState *env, ppcmas_tlb_t *tlb,
hwaddr *raddrp,
target_ulong address, uint32_t pid)
{
target_ulong mask;
uint32_t tlb_pid;
/* 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" TARGET_FMT_lx " MAS7_3=0x%" PRIx64 " MAS8=%x\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 int mmubooke206_check_tlb(CPUPPCState *env, ppcmas_tlb_t *tlb,
hwaddr *raddr, int *prot,
target_ulong address, int rw,
int access_type)
{
int ret;
int prot2 = 0;
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;
}
LOG_SWTLB("%s: TLB entry not found\n", __func__);
return -1;
found_tlb:
if (msr_pr != 0) {
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 == ACCESS_CODE) {
if (msr_ir != ((tlb->mas1 & MAS1_TS) >> MAS1_TS_SHIFT)) {
LOG_SWTLB("%s: AS doesn't match\n", __func__);
return -1;
}
*prot = prot2;
if (prot2 & PAGE_EXEC) {
LOG_SWTLB("%s: good TLB!\n", __func__);
return 0;
}
LOG_SWTLB("%s: no PAGE_EXEC: %x\n", __func__, prot2);
ret = -3;
} else {
if (msr_dr != ((tlb->mas1 & MAS1_TS) >> MAS1_TS_SHIFT)) {
LOG_SWTLB("%s: AS doesn't match\n", __func__);
return -1;
}
*prot = prot2;
if ((!rw && prot2 & PAGE_READ) || (rw && (prot2 & PAGE_WRITE))) {
LOG_SWTLB("%s: found TLB!\n", __func__);
return 0;
}
LOG_SWTLB("%s: PAGE_READ/WRITE doesn't match: %x\n", __func__, prot2);
ret = -2;
}
return ret;
}
static int mmubooke206_get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx,
target_ulong address, int rw,
int access_type)
{
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,
rw, access_type);
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(FILE *f, fprintf_function cpu_fprintf,
CPUPPCState *env)
{
ppcemb_tlb_t *entry;
int i;
if (kvm_enabled() && !env->kvm_sw_tlb) {
cpu_fprintf(f, "Cannot access KVM TLB\n");
return;
}
cpu_fprintf(f, "\nTLB:\n");
cpu_fprintf(f, "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;
size /= 1024;
if (size >= 1024) {
snprintf(size_buf, sizeof(size_buf), "%3" PRId64 "M", size / 1024);
} else {
snprintf(size_buf, sizeof(size_buf), "%3" PRId64 "k", size);
}
cpu_fprintf(f, "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(FILE *f, fprintf_function cpu_fprintf,
CPUPPCState *env, int tlbn, int offset,
int tlbsize)
{
ppcmas_tlb_t *entry;
int i;
cpu_fprintf(f, "\nTLB%d:\n", tlbn);
cpu_fprintf(f, "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);
cpu_fprintf(f, "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(FILE *f, fprintf_function cpu_fprintf,
CPUPPCState *env)
{
int offset = 0;
int i;
if (kvm_enabled() && !env->kvm_sw_tlb) {
cpu_fprintf(f, "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(f, cpu_fprintf, env, i, offset, size);
offset += size;
}
}
void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUPPCState *env)
{
switch (env->mmu_model) {
case POWERPC_MMU_BOOKE:
mmubooke_dump_mmu(f, cpu_fprintf, env);
break;
case POWERPC_MMU_BOOKE206:
mmubooke206_dump_mmu(f, cpu_fprintf, env);
break;
#if defined(TARGET_PPC64)
case POWERPC_MMU_64B:
case POWERPC_MMU_2_06:
case POWERPC_MMU_2_06d:
dump_slb(f, cpu_fprintf, env);
break;
#endif
default:
qemu_log_mask(LOG_UNIMP, "%s: unimplemented\n", __func__);
}
}
static inline int check_physical(CPUPPCState *env, mmu_ctx_t *ctx,
target_ulong eaddr, int rw)
{
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_74xx:
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 (rw == 1) {
/* 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;
}
static int get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx,
target_ulong eaddr, int rw, int access_type)
{
int ret = -1;
bool real_mode = (access_type == ACCESS_CODE && msr_ir == 0)
|| (access_type != ACCESS_CODE && msr_dr == 0);
#if 0
qemu_log("%s\n", __func__);
#endif
switch (env->mmu_model) {
case POWERPC_MMU_SOFT_6xx:
case POWERPC_MMU_SOFT_74xx:
if (real_mode) {
ret = check_physical(env, ctx, eaddr, rw);
} else {
/* Try to find a BAT */
if (env->nb_BATs != 0) {
ret = get_bat_6xx_tlb(env, ctx, eaddr, rw, 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, rw, access_type);
}
}
break;
case POWERPC_MMU_SOFT_4xx:
case POWERPC_MMU_SOFT_4xx_Z:
if (real_mode) {
ret = check_physical(env, ctx, eaddr, rw);
} else {
ret = mmu40x_get_physical_address(env, ctx, eaddr,
rw, access_type);
}
break;
case POWERPC_MMU_BOOKE:
ret = mmubooke_get_physical_address(env, ctx, eaddr,
rw, access_type);
break;
case POWERPC_MMU_BOOKE206:
ret = mmubooke206_get_physical_address(env, ctx, eaddr, rw,
access_type);
break;
case POWERPC_MMU_MPC8xx:
/* XXX: TODO */
cpu_abort(env, "MPC8xx MMU model is not implemented\n");
break;
case POWERPC_MMU_REAL:
if (real_mode) {
ret = check_physical(env, ctx, eaddr, rw);
} else {
cpu_abort(env, "PowerPC in real mode do not do any translation\n");
}
return -1;
default:
cpu_abort(env, "Unknown or invalid MMU model\n");
return -1;
}
#if 0
qemu_log("%s address " TARGET_FMT_lx " => %d " TARGET_FMT_plx "\n",
__func__, eaddr, ret, ctx->raddr);
#endif
return ret;
}
hwaddr cpu_get_phys_page_debug(CPUPPCState *env, target_ulong addr)
{
mmu_ctx_t ctx;
switch (env->mmu_model) {
#if defined(TARGET_PPC64)
case POWERPC_MMU_64B:
case POWERPC_MMU_2_06:
case POWERPC_MMU_2_06d:
return ppc_hash64_get_phys_page_debug(env, addr);
#endif
case POWERPC_MMU_32B:
case POWERPC_MMU_601:
return ppc_hash32_get_phys_page_debug(env, addr);
default:
;
}
if (unlikely(get_physical_address(env, &ctx, addr, 0, ACCESS_INT) != 0)) {
return -1;
}
return ctx.raddr & TARGET_PAGE_MASK;
}
static void booke206_update_mas_tlb_miss(CPUPPCState *env, target_ulong address,
int rw)
{
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 (((rw == 2) && msr_ir) || ((rw != 2) && msr_dr)) {
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;
switch (env->spr[SPR_BOOKE_MAS4] & MAS4_TIDSELD_PIDZ) {
case MAS4_TIDSELD_PID0:
env->spr[SPR_BOOKE_MAS1] |= env->spr[SPR_BOOKE_PID] << MAS1_TID_SHIFT;
break;
case MAS4_TIDSELD_PID1:
env->spr[SPR_BOOKE_MAS1] |= env->spr[SPR_BOOKE_PID1] << MAS1_TID_SHIFT;
break;
case MAS4_TIDSELD_PID2:
env->spr[SPR_BOOKE_MAS1] |= env->spr[SPR_BOOKE_PID2] << MAS1_TID_SHIFT;
break;
}
env->spr[SPR_BOOKE_MAS6] |= env->spr[SPR_BOOKE_PID] << 16;
/* 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 */
static int cpu_ppc_handle_mmu_fault(CPUPPCState *env, target_ulong address,
int rw, int mmu_idx)
{
mmu_ctx_t ctx;
int access_type;
int ret = 0;
if (rw == 2) {
/* code access */
rw = 0;
access_type = ACCESS_CODE;
} else {
/* data access */
access_type = env->access_type;
}
ret = get_physical_address(env, &ctx, address, rw, access_type);
if (ret == 0) {
tlb_set_page(env, address & TARGET_PAGE_MASK,
ctx.raddr & TARGET_PAGE_MASK, ctx.prot,
mmu_idx, TARGET_PAGE_SIZE);
ret = 0;
} else if (ret < 0) {
LOG_MMU_STATE(env);
if (access_type == ACCESS_CODE) {
switch (ret) {
case -1:
/* No matches in page tables or TLB */
switch (env->mmu_model) {
case POWERPC_MMU_SOFT_6xx:
env->exception_index = POWERPC_EXCP_IFTLB;
env->error_code = 1 << 18;
env->spr[SPR_IMISS] = address;
env->spr[SPR_ICMP] = 0x80000000 | ctx.ptem;
goto tlb_miss;
case POWERPC_MMU_SOFT_74xx:
env->exception_index = POWERPC_EXCP_IFTLB;
goto tlb_miss_74xx;
case POWERPC_MMU_SOFT_4xx:
case POWERPC_MMU_SOFT_4xx_Z:
env->exception_index = POWERPC_EXCP_ITLB;
env->error_code = 0;
env->spr[SPR_40x_DEAR] = address;
env->spr[SPR_40x_ESR] = 0x00000000;
break;
case POWERPC_MMU_BOOKE206:
booke206_update_mas_tlb_miss(env, address, rw);
/* fall through */
case POWERPC_MMU_BOOKE:
env->exception_index = POWERPC_EXCP_ITLB;
env->error_code = 0;
env->spr[SPR_BOOKE_DEAR] = address;
return -1;
case POWERPC_MMU_MPC8xx:
/* XXX: TODO */
cpu_abort(env, "MPC8xx MMU model is not implemented\n");
break;
case POWERPC_MMU_REAL:
cpu_abort(env, "PowerPC in real mode should never raise "
"any MMU exceptions\n");
return -1;
default:
cpu_abort(env, "Unknown or invalid MMU model\n");
return -1;
}
break;
case -2:
/* Access rights violation */
env->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;
}
env->exception_index = POWERPC_EXCP_ISI;
env->error_code = 0x10000000;
break;
case -4:
/* Direct store exception */
/* No code fetch is allowed in direct-store areas */
env->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 (rw == 1) {
env->exception_index = POWERPC_EXCP_DSTLB;
env->error_code = 1 << 16;
} else {
env->exception_index = POWERPC_EXCP_DLTLB;
env->error_code = 0;
}
env->spr[SPR_DMISS] = address;
env->spr[SPR_DCMP] = 0x80000000 | ctx.ptem;
tlb_miss:
env->error_code |= ctx.key << 19;
env->spr[SPR_HASH1] = env->htab_base +
get_pteg_offset32(env, ctx.hash[0]);
env->spr[SPR_HASH2] = env->htab_base +
get_pteg_offset32(env, ctx.hash[1]);
break;
case POWERPC_MMU_SOFT_74xx:
if (rw == 1) {
env->exception_index = POWERPC_EXCP_DSTLB;
} else {
env->exception_index = POWERPC_EXCP_DLTLB;
}
tlb_miss_74xx:
/* Implement LRU algorithm */
env->error_code = ctx.key << 19;
env->spr[SPR_TLBMISS] = (address & ~((target_ulong)0x3)) |
((env->last_way + 1) & (env->nb_ways - 1));
env->spr[SPR_PTEHI] = 0x80000000 | ctx.ptem;
break;
case POWERPC_MMU_SOFT_4xx:
case POWERPC_MMU_SOFT_4xx_Z:
env->exception_index = POWERPC_EXCP_DTLB;
env->error_code = 0;
env->spr[SPR_40x_DEAR] = address;
if (rw) {
env->spr[SPR_40x_ESR] = 0x00800000;
} else {
env->spr[SPR_40x_ESR] = 0x00000000;
}
break;
case POWERPC_MMU_MPC8xx:
/* XXX: TODO */
cpu_abort(env, "MPC8xx MMU model is not implemented\n");
break;
case POWERPC_MMU_BOOKE206:
booke206_update_mas_tlb_miss(env, address, rw);
/* fall through */
case POWERPC_MMU_BOOKE:
env->exception_index = POWERPC_EXCP_DTLB;
env->error_code = 0;
env->spr[SPR_BOOKE_DEAR] = address;
env->spr[SPR_BOOKE_ESR] = rw ? ESR_ST : 0;
return -1;
case POWERPC_MMU_REAL:
cpu_abort(env, "PowerPC in real mode should never raise "
"any MMU exceptions\n");
return -1;
default:
cpu_abort(env, "Unknown or invalid MMU model\n");
return -1;
}
break;
case -2:
/* Access rights violation */
env->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] = address;
if (rw) {
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] = address;
env->spr[SPR_BOOKE_ESR] = rw ? ESR_ST : 0;
} else {
env->spr[SPR_DAR] = address;
if (rw == 1) {
env->spr[SPR_DSISR] = 0x0A000000;
} else {
env->spr[SPR_DSISR] = 0x08000000;
}
}
break;
case -4:
/* Direct store exception */
switch (access_type) {
case ACCESS_FLOAT:
/* Floating point load/store */
env->exception_index = POWERPC_EXCP_ALIGN;
env->error_code = POWERPC_EXCP_ALIGN_FP;
env->spr[SPR_DAR] = address;
break;
case ACCESS_RES:
/* lwarx, ldarx or stwcx. */
env->exception_index = POWERPC_EXCP_DSI;
env->error_code = 0;
env->spr[SPR_DAR] = address;
if (rw == 1) {
env->spr[SPR_DSISR] = 0x06000000;
} else {
env->spr[SPR_DSISR] = 0x04000000;
}
break;
case ACCESS_EXT:
/* eciwx or ecowx */
env->exception_index = POWERPC_EXCP_DSI;
env->error_code = 0;
env->spr[SPR_DAR] = address;
if (rw == 1) {
env->spr[SPR_DSISR] = 0x06100000;
} else {
env->spr[SPR_DSISR] = 0x04100000;
}
break;
default:
printf("DSI: invalid exception (%d)\n", ret);
env->exception_index = POWERPC_EXCP_PROGRAM;
env->error_code =
POWERPC_EXCP_INVAL | POWERPC_EXCP_INVAL_INVAL;
env->spr[SPR_DAR] = address;
break;
}
break;
}
}
#if 0
printf("%s: set exception to %d %02x\n", __func__,
env->exception, env->error_code);
#endif
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;
LOG_BATS("Flush BAT from " TARGET_FMT_lx " to " TARGET_FMT_lx " ("
TARGET_FMT_lx ")\n", base, end, mask);
for (page = base; page != end; page += TARGET_PAGE_SIZE) {
tlb_flush_page(env, page);
}
LOG_BATS("Flush done\n");
}
#endif
static inline void dump_store_bat(CPUPPCState *env, char ID, int ul, int nr,
target_ulong value)
{
LOG_BATS("Set %cBAT%d%c to " TARGET_FMT_lx " (" TARGET_FMT_lx ")\n", ID,
nr, ul == 0 ? 'u' : 'l', value, env->nip);
}
void helper_store_ibatu(CPUPPCState *env, uint32_t 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 helper_store_ibatl(CPUPPCState *env, uint32_t nr, target_ulong value)
{
dump_store_bat(env, 'I', 1, nr, value);
env->IBAT[1][nr] = value;
}
void helper_store_dbatu(CPUPPCState *env, uint32_t 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 helper_store_dbatl(CPUPPCState *env, uint32_t nr, target_ulong value)
{
dump_store_bat(env, 'D', 1, nr, value);
env->DBAT[1][nr] = value;
}
void helper_store_601_batu(CPUPPCState *env, uint32_t nr, target_ulong value)
{
target_ulong mask;
#if defined(FLUSH_ALL_TLBS)
int do_inval;
#endif
dump_store_bat(env, 'I', 0, nr, value);
if (env->IBAT[0][nr] != value) {
#if defined(FLUSH_ALL_TLBS)
do_inval = 0;
#endif
mask = (env->IBAT[1][nr] << 17) & 0x0FFE0000UL;
if (env->IBAT[1][nr] & 0x40) {
/* Invalidate BAT only if it is valid */
#if !defined(FLUSH_ALL_TLBS)
do_invalidate_BAT(env, env->IBAT[0][nr], mask);
#else
do_inval = 1;
#endif
}
/* When storing valid upper BAT, mask BEPI and BRPN
* and invalidate all TLBs covered by this BAT
*/
env->IBAT[0][nr] = (value & 0x00001FFFUL) |
(value & ~0x0001FFFFUL & ~mask);
env->DBAT[0][nr] = env->IBAT[0][nr];
if (env->IBAT[1][nr] & 0x40) {
#if !defined(FLUSH_ALL_TLBS)
do_invalidate_BAT(env, env->IBAT[0][nr], mask);
#else
do_inval = 1;
#endif
}
#if defined(FLUSH_ALL_TLBS)
if (do_inval) {
tlb_flush(env, 1);
}
#endif
}
}
void helper_store_601_batl(CPUPPCState *env, uint32_t nr, target_ulong value)
{
#if !defined(FLUSH_ALL_TLBS)
target_ulong mask;
#else
int do_inval;
#endif
dump_store_bat(env, 'I', 1, nr, value);
if (env->IBAT[1][nr] != value) {
#if defined(FLUSH_ALL_TLBS)
do_inval = 0;
#endif
if (env->IBAT[1][nr] & 0x40) {
#if !defined(FLUSH_ALL_TLBS)
mask = (env->IBAT[1][nr] << 17) & 0x0FFE0000UL;
do_invalidate_BAT(env, env->IBAT[0][nr], mask);
#else
do_inval = 1;
#endif
}
if (value & 0x40) {
#if !defined(FLUSH_ALL_TLBS)
mask = (value << 17) & 0x0FFE0000UL;
do_invalidate_BAT(env, env->IBAT[0][nr], mask);
#else
do_inval = 1;
#endif
}
env->IBAT[1][nr] = value;
env->DBAT[1][nr] = value;
#if defined(FLUSH_ALL_TLBS)
if (do_inval) {
tlb_flush(env, 1);
}
#endif
}
}
/*****************************************************************************/
/* TLB management */
void ppc_tlb_invalidate_all(CPUPPCState *env)
{
switch (env->mmu_model) {
case POWERPC_MMU_SOFT_6xx:
case POWERPC_MMU_SOFT_74xx:
ppc6xx_tlb_invalidate_all(env);
break;
case POWERPC_MMU_SOFT_4xx:
case POWERPC_MMU_SOFT_4xx_Z:
ppc4xx_tlb_invalidate_all(env);
break;
case POWERPC_MMU_REAL:
cpu_abort(env, "No TLB for PowerPC 4xx in real mode\n");
break;
case POWERPC_MMU_MPC8xx:
/* XXX: TODO */
cpu_abort(env, "MPC8xx MMU model is not implemented\n");
break;
case POWERPC_MMU_BOOKE:
tlb_flush(env, 1);
break;
case POWERPC_MMU_BOOKE206:
booke206_flush_tlb(env, -1, 0);
break;
case POWERPC_MMU_32B:
case POWERPC_MMU_601:
#if defined(TARGET_PPC64)
case POWERPC_MMU_64B:
case POWERPC_MMU_2_06:
case POWERPC_MMU_2_06d:
#endif /* defined(TARGET_PPC64) */
tlb_flush(env, 1);
break;
default:
/* XXX: TODO */
cpu_abort(env, "Unknown MMU model\n");
break;
}
}
void ppc_tlb_invalidate_one(CPUPPCState *env, target_ulong addr)
{
#if !defined(FLUSH_ALL_TLBS)
addr &= TARGET_PAGE_MASK;
switch (env->mmu_model) {
case POWERPC_MMU_SOFT_6xx:
case POWERPC_MMU_SOFT_74xx:
ppc6xx_tlb_invalidate_virt(env, addr, 0);
if (env->id_tlbs == 1) {
ppc6xx_tlb_invalidate_virt(env, addr, 1);
}
break;
case POWERPC_MMU_SOFT_4xx:
case POWERPC_MMU_SOFT_4xx_Z:
ppc4xx_tlb_invalidate_virt(env, addr, env->spr[SPR_40x_PID]);
break;
case POWERPC_MMU_REAL:
cpu_abort(env, "No TLB for PowerPC 4xx in real mode\n");
break;
case POWERPC_MMU_MPC8xx:
/* XXX: TODO */
cpu_abort(env, "MPC8xx MMU model is not implemented\n");
break;
case POWERPC_MMU_BOOKE:
/* XXX: TODO */
cpu_abort(env, "BookE MMU model is not implemented\n");
break;
case POWERPC_MMU_BOOKE206:
/* XXX: TODO */
cpu_abort(env, "BookE 2.06 MMU model is not implemented\n");
break;
case POWERPC_MMU_32B:
case POWERPC_MMU_601:
/* tlbie invalidate TLBs for all segments */
addr &= ~((target_ulong)-1ULL << 28);
/* XXX: this case should be optimized,
* giving a mask to tlb_flush_page
*/
tlb_flush_page(env, addr | (0x0 << 28));
tlb_flush_page(env, addr | (0x1 << 28));
tlb_flush_page(env, addr | (0x2 << 28));
tlb_flush_page(env, addr | (0x3 << 28));
tlb_flush_page(env, addr | (0x4 << 28));
tlb_flush_page(env, addr | (0x5 << 28));
tlb_flush_page(env, addr | (0x6 << 28));
tlb_flush_page(env, addr | (0x7 << 28));
tlb_flush_page(env, addr | (0x8 << 28));
tlb_flush_page(env, addr | (0x9 << 28));
tlb_flush_page(env, addr | (0xA << 28));
tlb_flush_page(env, addr | (0xB << 28));
tlb_flush_page(env, addr | (0xC << 28));
tlb_flush_page(env, addr | (0xD << 28));
tlb_flush_page(env, addr | (0xE << 28));
tlb_flush_page(env, addr | (0xF << 28));
break;
#if defined(TARGET_PPC64)
case POWERPC_MMU_64B:
case POWERPC_MMU_2_06:
case POWERPC_MMU_2_06d:
/* tlbie invalidate TLBs for all segments */
/* XXX: given the fact that there are too many segments to invalidate,
* and we still don't have a tlb_flush_mask(env, n, mask) in QEMU,
* we just invalidate all TLBs
*/
tlb_flush(env, 1);
break;
#endif /* defined(TARGET_PPC64) */
default:
/* XXX: TODO */
cpu_abort(env, "Unknown MMU model\n");
break;
}
#else
ppc_tlb_invalidate_all(env);
#endif
}
/*****************************************************************************/
/* Special registers manipulation */
void ppc_store_sdr1(CPUPPCState *env, target_ulong value)
{
LOG_MMU("%s: " TARGET_FMT_lx "\n", __func__, value);
if (env->spr[SPR_SDR1] != value) {
env->spr[SPR_SDR1] = value;
#if defined(TARGET_PPC64)
if (env->mmu_model & POWERPC_MMU_64) {
target_ulong htabsize = value & SDR_64_HTABSIZE;
if (htabsize > 28) {
fprintf(stderr, "Invalid HTABSIZE 0x" TARGET_FMT_lx
" stored in SDR1\n", htabsize);
htabsize = 28;
}
env->htab_mask = (1ULL << (htabsize + 18)) - 1;
env->htab_base = value & SDR_64_HTABORG;
} else
#endif /* defined(TARGET_PPC64) */
{
/* FIXME: Should check for valid HTABMASK values */
env->htab_mask = ((value & SDR_32_HTABMASK) << 16) | 0xFFFF;
env->htab_base = value & SDR_32_HTABORG;
}
tlb_flush(env, 1);
}
}
/* Segment registers load and store */
target_ulong helper_load_sr(CPUPPCState *env, target_ulong sr_num)
{
#if defined(TARGET_PPC64)
if (env->mmu_model & POWERPC_MMU_64) {
/* XXX */
return 0;
}
#endif
return env->sr[sr_num];
}
void helper_store_sr(CPUPPCState *env, target_ulong srnum, target_ulong value)
{
LOG_MMU("%s: reg=%d " TARGET_FMT_lx " " TARGET_FMT_lx "\n", __func__,
(int)srnum, value, env->sr[srnum]);
#if defined(TARGET_PPC64)
if (env->mmu_model & POWERPC_MMU_64) {
uint64_t rb = 0, rs = 0;
/* ESID = srnum */
rb |= ((uint32_t)srnum & 0xf) << 28;
/* Set the valid bit */
rb |= 1 << 27;
/* Index = ESID */
rb |= (uint32_t)srnum;
/* VSID = VSID */
rs |= (value & 0xfffffff) << 12;
/* flags = flags */
rs |= ((value >> 27) & 0xf) << 8;
ppc_store_slb(env, rb, rs);
} else
#endif
if (env->sr[srnum] != value) {
env->sr[srnum] = value;
/* Invalidating 256MB of virtual memory in 4kB pages is way longer than
flusing the whole TLB. */
#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
}
}
/* TLB management */
void helper_tlbia(CPUPPCState *env)
{
ppc_tlb_invalidate_all(env);
}
void helper_tlbie(CPUPPCState *env, target_ulong addr)
{
ppc_tlb_invalidate_one(env, addr);
}
/* Software driven TLBs management */
/* PowerPC 602/603 software TLB load instructions helpers */
static void do_6xx_tlb(CPUPPCState *env, target_ulong new_EPN, int is_code)
{
target_ulong RPN, CMP, EPN;
int way;
RPN = env->spr[SPR_RPA];
if (is_code) {
CMP = env->spr[SPR_ICMP];
EPN = env->spr[SPR_IMISS];
} else {
CMP = env->spr[SPR_DCMP];
EPN = env->spr[SPR_DMISS];
}
way = (env->spr[SPR_SRR1] >> 17) & 1;
(void)EPN; /* avoid a compiler warning */
LOG_SWTLB("%s: EPN " TARGET_FMT_lx " " TARGET_FMT_lx " PTE0 " TARGET_FMT_lx
" PTE1 " TARGET_FMT_lx " way %d\n", __func__, new_EPN, EPN, CMP,
RPN, way);
/* Store this TLB */
ppc6xx_tlb_store(env, (uint32_t)(new_EPN & TARGET_PAGE_MASK),
way, is_code, CMP, RPN);
}
void helper_6xx_tlbd(CPUPPCState *env, target_ulong EPN)
{
do_6xx_tlb(env, EPN, 0);
}
void helper_6xx_tlbi(CPUPPCState *env, target_ulong EPN)
{
do_6xx_tlb(env, EPN, 1);
}
/* PowerPC 74xx software TLB load instructions helpers */
static void do_74xx_tlb(CPUPPCState *env, target_ulong new_EPN, int is_code)
{
target_ulong RPN, CMP, EPN;
int way;
RPN = env->spr[SPR_PTELO];
CMP = env->spr[SPR_PTEHI];
EPN = env->spr[SPR_TLBMISS] & ~0x3;
way = env->spr[SPR_TLBMISS] & 0x3;
(void)EPN; /* avoid a compiler warning */
LOG_SWTLB("%s: EPN " TARGET_FMT_lx " " TARGET_FMT_lx " PTE0 " TARGET_FMT_lx
" PTE1 " TARGET_FMT_lx " way %d\n", __func__, new_EPN, EPN, CMP,
RPN, way);
/* Store this TLB */
ppc6xx_tlb_store(env, (uint32_t)(new_EPN & TARGET_PAGE_MASK),
way, is_code, CMP, RPN);
}
void helper_74xx_tlbd(CPUPPCState *env, target_ulong EPN)
{
do_74xx_tlb(env, EPN, 0);
}
void helper_74xx_tlbi(CPUPPCState *env, target_ulong EPN)
{
do_74xx_tlb(env, EPN, 1);
}
/*****************************************************************************/
/* PowerPC 601 specific instructions (POWER bridge) */
target_ulong helper_rac(CPUPPCState *env, target_ulong addr)
{
mmu_ctx_t ctx;
int nb_BATs;
target_ulong ret = 0;
/* We don't have to generate many instances of this instruction,
* as rac is supervisor only.
*/
/* XXX: FIX THIS: Pretend we have no BAT */
nb_BATs = env->nb_BATs;
env->nb_BATs = 0;
if (get_physical_address(env, &ctx, addr, 0, ACCESS_INT) == 0) {
ret = ctx.raddr;
}
env->nb_BATs = nb_BATs;
return ret;
}
static inline target_ulong booke_tlb_to_page_size(int size)
{
return 1024 << (2 * size);
}
static inline int booke_page_size_to_tlb(target_ulong page_size)
{
int size;
switch (page_size) {
case 0x00000400UL:
size = 0x0;
break;
case 0x00001000UL:
size = 0x1;
break;
case 0x00004000UL:
size = 0x2;
break;
case 0x00010000UL:
size = 0x3;
break;
case 0x00040000UL:
size = 0x4;
break;
case 0x00100000UL:
size = 0x5;
break;
case 0x00400000UL:
size = 0x6;
break;
case 0x01000000UL:
size = 0x7;
break;
case 0x04000000UL:
size = 0x8;
break;
case 0x10000000UL:
size = 0x9;
break;
case 0x40000000UL:
size = 0xA;
break;
#if defined(TARGET_PPC64)
case 0x000100000000ULL:
size = 0xB;
break;
case 0x000400000000ULL:
size = 0xC;
break;
case 0x001000000000ULL:
size = 0xD;
break;
case 0x004000000000ULL:
size = 0xE;
break;
case 0x010000000000ULL:
size = 0xF;
break;
#endif
default:
size = -1;
break;
}
return size;
}
/* Helpers for 4xx TLB management */
#define PPC4XX_TLB_ENTRY_MASK 0x0000003f /* Mask for 64 TLB entries */
#define PPC4XX_TLBHI_V 0x00000040
#define PPC4XX_TLBHI_E 0x00000020
#define PPC4XX_TLBHI_SIZE_MIN 0
#define PPC4XX_TLBHI_SIZE_MAX 7
#define PPC4XX_TLBHI_SIZE_DEFAULT 1
#define PPC4XX_TLBHI_SIZE_SHIFT 7
#define PPC4XX_TLBHI_SIZE_MASK 0x00000007
#define PPC4XX_TLBLO_EX 0x00000200
#define PPC4XX_TLBLO_WR 0x00000100
#define PPC4XX_TLBLO_ATTR_MASK 0x000000FF
#define PPC4XX_TLBLO_RPN_MASK 0xFFFFFC00
target_ulong helper_4xx_tlbre_hi(CPUPPCState *env, target_ulong entry)
{
ppcemb_tlb_t *tlb;
target_ulong ret;
int size;
entry &= PPC4XX_TLB_ENTRY_MASK;
tlb = &env->tlb.tlbe[entry];
ret = tlb->EPN;
if (tlb->prot & PAGE_VALID) {
ret |= PPC4XX_TLBHI_V;
}
size = booke_page_size_to_tlb(tlb->size);
if (size < PPC4XX_TLBHI_SIZE_MIN || size > PPC4XX_TLBHI_SIZE_MAX) {
size = PPC4XX_TLBHI_SIZE_DEFAULT;
}
ret |= size << PPC4XX_TLBHI_SIZE_SHIFT;
env->spr[SPR_40x_PID] = tlb->PID;
return ret;
}
target_ulong helper_4xx_tlbre_lo(CPUPPCState *env, target_ulong entry)
{
ppcemb_tlb_t *tlb;
target_ulong ret;
entry &= PPC4XX_TLB_ENTRY_MASK;
tlb = &env->tlb.tlbe[entry];
ret = tlb->RPN;
if (tlb->prot & PAGE_EXEC) {
ret |= PPC4XX_TLBLO_EX;
}
if (tlb->prot & PAGE_WRITE) {
ret |= PPC4XX_TLBLO_WR;
}
return ret;
}
void helper_4xx_tlbwe_hi(CPUPPCState *env, target_ulong entry,
target_ulong val)
{
ppcemb_tlb_t *tlb;
target_ulong page, end;
LOG_SWTLB("%s entry %d val " TARGET_FMT_lx "\n", __func__, (int)entry,
val);
entry &= PPC4XX_TLB_ENTRY_MASK;
tlb = &env->tlb.tlbe[entry];
/* Invalidate previous TLB (if it's valid) */
if (tlb->prot & PAGE_VALID) {
end = tlb->EPN + tlb->size;
LOG_SWTLB("%s: invalidate old TLB %d start " TARGET_FMT_lx " end "
TARGET_FMT_lx "\n", __func__, (int)entry, tlb->EPN, end);
for (page = tlb->EPN; page < end; page += TARGET_PAGE_SIZE) {
tlb_flush_page(env, page);
}
}
tlb->size = booke_tlb_to_page_size((val >> PPC4XX_TLBHI_SIZE_SHIFT)
& PPC4XX_TLBHI_SIZE_MASK);
/* We cannot handle TLB size < TARGET_PAGE_SIZE.
* If this ever occurs, one should use the ppcemb target instead
* of the ppc or ppc64 one
*/
if ((val & PPC4XX_TLBHI_V) && tlb->size < TARGET_PAGE_SIZE) {
cpu_abort(env, "TLB size " TARGET_FMT_lu " < %u "
"are not supported (%d)\n",
tlb->size, TARGET_PAGE_SIZE, (int)((val >> 7) & 0x7));
}
tlb->EPN = val & ~(tlb->size - 1);
if (val & PPC4XX_TLBHI_V) {
tlb->prot |= PAGE_VALID;
if (val & PPC4XX_TLBHI_E) {
/* XXX: TO BE FIXED */
cpu_abort(env,
"Little-endian TLB entries are not supported by now\n");
}
} else {
tlb->prot &= ~PAGE_VALID;
}
tlb->PID = env->spr[SPR_40x_PID]; /* PID */
LOG_SWTLB("%s: set up TLB %d RPN " TARGET_FMT_plx " EPN " TARGET_FMT_lx
" size " TARGET_FMT_lx " prot %c%c%c%c PID %d\n", __func__,
(int)entry, tlb->RPN, tlb->EPN, tlb->size,
tlb->prot & PAGE_READ ? 'r' : '-',
tlb->prot & PAGE_WRITE ? 'w' : '-',
tlb->prot & PAGE_EXEC ? 'x' : '-',
tlb->prot & PAGE_VALID ? 'v' : '-', (int)tlb->PID);
/* Invalidate new TLB (if valid) */
if (tlb->prot & PAGE_VALID) {
end = tlb->EPN + tlb->size;
LOG_SWTLB("%s: invalidate TLB %d start " TARGET_FMT_lx " end "
TARGET_FMT_lx "\n", __func__, (int)entry, tlb->EPN, end);
for (page = tlb->EPN; page < end; page += TARGET_PAGE_SIZE) {
tlb_flush_page(env, page);
}
}
}
void helper_4xx_tlbwe_lo(CPUPPCState *env, target_ulong entry,
target_ulong val)
{
ppcemb_tlb_t *tlb;
LOG_SWTLB("%s entry %i val " TARGET_FMT_lx "\n", __func__, (int)entry,
val);
entry &= PPC4XX_TLB_ENTRY_MASK;
tlb = &env->tlb.tlbe[entry];
tlb->attr = val & PPC4XX_TLBLO_ATTR_MASK;
tlb->RPN = val & PPC4XX_TLBLO_RPN_MASK;
tlb->prot = PAGE_READ;
if (val & PPC4XX_TLBLO_EX) {
tlb->prot |= PAGE_EXEC;
}
if (val & PPC4XX_TLBLO_WR) {
tlb->prot |= PAGE_WRITE;
}
LOG_SWTLB("%s: set up TLB %d RPN " TARGET_FMT_plx " EPN " TARGET_FMT_lx
" size " TARGET_FMT_lx " prot %c%c%c%c PID %d\n", __func__,
(int)entry, tlb->RPN, tlb->EPN, tlb->size,
tlb->prot & PAGE_READ ? 'r' : '-',
tlb->prot & PAGE_WRITE ? 'w' : '-',
tlb->prot & PAGE_EXEC ? 'x' : '-',
tlb->prot & PAGE_VALID ? 'v' : '-', (int)tlb->PID);
}
target_ulong helper_4xx_tlbsx(CPUPPCState *env, target_ulong address)
{
return ppcemb_tlb_search(env, address, env->spr[SPR_40x_PID]);
}
/* PowerPC 440 TLB management */
void helper_440_tlbwe(CPUPPCState *env, uint32_t word, target_ulong entry,
target_ulong value)
{
ppcemb_tlb_t *tlb;
target_ulong EPN, RPN, size;
int do_flush_tlbs;
LOG_SWTLB("%s word %d entry %d value " TARGET_FMT_lx "\n",
__func__, word, (int)entry, value);
do_flush_tlbs = 0;
entry &= 0x3F;
tlb = &env->tlb.tlbe[entry];
switch (word) {
default:
/* Just here to please gcc */
case 0:
EPN = value & 0xFFFFFC00;
if ((tlb->prot & PAGE_VALID) && EPN != tlb->EPN) {
do_flush_tlbs = 1;
}
tlb->EPN = EPN;
size = booke_tlb_to_page_size((value >> 4) & 0xF);
if ((tlb->prot & PAGE_VALID) && tlb->size < size) {
do_flush_tlbs = 1;
}
tlb->size = size;
tlb->attr &= ~0x1;
tlb->attr |= (value >> 8) & 1;
if (value & 0x200) {
tlb->prot |= PAGE_VALID;
} else {
if (tlb->prot & PAGE_VALID) {
tlb->prot &= ~PAGE_VALID;
do_flush_tlbs = 1;
}
}
tlb->PID = env->spr[SPR_440_MMUCR] & 0x000000FF;
if (do_flush_tlbs) {
tlb_flush(env, 1);
}
break;
case 1:
RPN = value & 0xFFFFFC0F;
if ((tlb->prot & PAGE_VALID) && tlb->RPN != RPN) {
tlb_flush(env, 1);
}
tlb->RPN = RPN;
break;
case 2:
tlb->attr = (tlb->attr & 0x1) | (value & 0x0000FF00);
tlb->prot = tlb->prot & PAGE_VALID;
if (value & 0x1) {
tlb->prot |= PAGE_READ << 4;
}
if (value & 0x2) {
tlb->prot |= PAGE_WRITE << 4;
}
if (value & 0x4) {
tlb->prot |= PAGE_EXEC << 4;
}
if (value & 0x8) {
tlb->prot |= PAGE_READ;
}
if (value & 0x10) {
tlb->prot |= PAGE_WRITE;
}
if (value & 0x20) {
tlb->prot |= PAGE_EXEC;
}
break;
}
}
target_ulong helper_440_tlbre(CPUPPCState *env, uint32_t word,
target_ulong entry)
{
ppcemb_tlb_t *tlb;
target_ulong ret;
int size;
entry &= 0x3F;
tlb = &env->tlb.tlbe[entry];
switch (word) {
default:
/* Just here to please gcc */
case 0:
ret = tlb->EPN;
size = booke_page_size_to_tlb(tlb->size);
if (size < 0 || size > 0xF) {
size = 1;
}
ret |= size << 4;
if (tlb->attr & 0x1) {
ret |= 0x100;
}
if (tlb->prot & PAGE_VALID) {
ret |= 0x200;
}
env->spr[SPR_440_MMUCR] &= ~0x000000FF;
env->spr[SPR_440_MMUCR] |= tlb->PID;
break;
case 1:
ret = tlb->RPN;
break;
case 2:
ret = tlb->attr & ~0x1;
if (tlb->prot & (PAGE_READ << 4)) {
ret |= 0x1;
}
if (tlb->prot & (PAGE_WRITE << 4)) {
ret |= 0x2;
}
if (tlb->prot & (PAGE_EXEC << 4)) {
ret |= 0x4;
}
if (tlb->prot & PAGE_READ) {
ret |= 0x8;
}
if (tlb->prot & PAGE_WRITE) {
ret |= 0x10;
}
if (tlb->prot & PAGE_EXEC) {
ret |= 0x20;
}
break;
}
return ret;
}
target_ulong helper_440_tlbsx(CPUPPCState *env, target_ulong address)
{
return ppcemb_tlb_search(env, address, env->spr[SPR_440_MMUCR] & 0xFF);
}
/* PowerPC BookE 2.06 TLB management */
static ppcmas_tlb_t *booke206_cur_tlb(CPUPPCState *env)
{
uint32_t tlbncfg = 0;
int esel = (env->spr[SPR_BOOKE_MAS0] & MAS0_ESEL_MASK) >> MAS0_ESEL_SHIFT;
int ea = (env->spr[SPR_BOOKE_MAS2] & MAS2_EPN_MASK);
int tlb;
tlb = (env->spr[SPR_BOOKE_MAS0] & MAS0_TLBSEL_MASK) >> MAS0_TLBSEL_SHIFT;
tlbncfg = env->spr[SPR_BOOKE_TLB0CFG + tlb];
if ((tlbncfg & TLBnCFG_HES) && (env->spr[SPR_BOOKE_MAS0] & MAS0_HES)) {
cpu_abort(env, "we don't support HES yet\n");
}
return booke206_get_tlbm(env, tlb, ea, esel);
}
void helper_booke_setpid(CPUPPCState *env, uint32_t pidn, target_ulong pid)
{
env->spr[pidn] = pid;
/* changing PIDs mean we're in a different address space now */
tlb_flush(env, 1);
}
void helper_booke206_tlbwe(CPUPPCState *env)
{
uint32_t tlbncfg, tlbn;
ppcmas_tlb_t *tlb;
uint32_t size_tlb, size_ps;
target_ulong mask;
switch (env->spr[SPR_BOOKE_MAS0] & MAS0_WQ_MASK) {
case MAS0_WQ_ALWAYS:
/* good to go, write that entry */
break;
case MAS0_WQ_COND:
/* XXX check if reserved */
if (0) {
return;
}
break;
case MAS0_WQ_CLR_RSRV:
/* XXX clear entry */
return;
default:
/* no idea what to do */
return;
}
if (((env->spr[SPR_BOOKE_MAS0] & MAS0_ATSEL) == MAS0_ATSEL_LRAT) &&
!msr_gs) {
/* XXX we don't support direct LRAT setting yet */
fprintf(stderr, "cpu: don't support LRAT setting yet\n");
return;
}
tlbn = (env->spr[SPR_BOOKE_MAS0] & MAS0_TLBSEL_MASK) >> MAS0_TLBSEL_SHIFT;
tlbncfg = env->spr[SPR_BOOKE_TLB0CFG + tlbn];
tlb = booke206_cur_tlb(env);
if (!tlb) {
helper_raise_exception_err(env, POWERPC_EXCP_PROGRAM,
POWERPC_EXCP_INVAL |
POWERPC_EXCP_INVAL_INVAL);
}
/* check that we support the targeted size */
size_tlb = (env->spr[SPR_BOOKE_MAS1] & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT;
size_ps = booke206_tlbnps(env, tlbn);
if ((env->spr[SPR_BOOKE_MAS1] & MAS1_VALID) && (tlbncfg & TLBnCFG_AVAIL) &&
!(size_ps & (1 << size_tlb))) {
helper_raise_exception_err(env, POWERPC_EXCP_PROGRAM,
POWERPC_EXCP_INVAL |
POWERPC_EXCP_INVAL_INVAL);
}
if (msr_gs) {
cpu_abort(env, "missing HV implementation\n");
}
tlb->mas7_3 = ((uint64_t)env->spr[SPR_BOOKE_MAS7] << 32) |
env->spr[SPR_BOOKE_MAS3];
tlb->mas1 = env->spr[SPR_BOOKE_MAS1];
/* MAV 1.0 only */
if (!(tlbncfg & TLBnCFG_AVAIL)) {
/* force !AVAIL TLB entries to correct page size */
tlb->mas1 &= ~MAS1_TSIZE_MASK;
/* XXX can be configured in MMUCSR0 */
tlb->mas1 |= (tlbncfg & TLBnCFG_MINSIZE) >> 12;
}
/* Make a mask from TLB size to discard invalid bits in EPN field */
mask = ~(booke206_tlb_to_page_size(env, tlb) - 1);
/* Add a mask for page attributes */
mask |= MAS2_ACM | MAS2_VLE | MAS2_W | MAS2_I | MAS2_M | MAS2_G | MAS2_E;
if (!msr_cm) {
/* Executing a tlbwe instruction in 32-bit mode will set
* bits 0:31 of the TLB EPN field to zero.
*/
mask &= 0xffffffff;
}
tlb->mas2 = env->spr[SPR_BOOKE_MAS2] & mask;
if (!(tlbncfg & TLBnCFG_IPROT)) {
/* no IPROT supported by TLB */
tlb->mas1 &= ~MAS1_IPROT;
}
if (booke206_tlb_to_page_size(env, tlb) == TARGET_PAGE_SIZE) {
tlb_flush_page(env, tlb->mas2 & MAS2_EPN_MASK);
} else {
tlb_flush(env, 1);
}
}
static inline void booke206_tlb_to_mas(CPUPPCState *env, ppcmas_tlb_t *tlb)
{
int tlbn = booke206_tlbm_to_tlbn(env, tlb);
int way = booke206_tlbm_to_way(env, tlb);
env->spr[SPR_BOOKE_MAS0] = tlbn << MAS0_TLBSEL_SHIFT;
env->spr[SPR_BOOKE_MAS0] |= way << MAS0_ESEL_SHIFT;
env->spr[SPR_BOOKE_MAS0] |= env->last_way << MAS0_NV_SHIFT;
env->spr[SPR_BOOKE_MAS1] = tlb->mas1;
env->spr[SPR_BOOKE_MAS2] = tlb->mas2;
env->spr[SPR_BOOKE_MAS3] = tlb->mas7_3;
env->spr[SPR_BOOKE_MAS7] = tlb->mas7_3 >> 32;
}
void helper_booke206_tlbre(CPUPPCState *env)
{
ppcmas_tlb_t *tlb = NULL;
tlb = booke206_cur_tlb(env);
if (!tlb) {
env->spr[SPR_BOOKE_MAS1] = 0;
} else {
booke206_tlb_to_mas(env, tlb);
}
}
void helper_booke206_tlbsx(CPUPPCState *env, target_ulong address)
{
ppcmas_tlb_t *tlb = NULL;
int i, j;
hwaddr raddr;
uint32_t spid, sas;
spid = (env->spr[SPR_BOOKE_MAS6] & MAS6_SPID_MASK) >> MAS6_SPID_SHIFT;
sas = env->spr[SPR_BOOKE_MAS6] & MAS6_SAS;
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;
}
if (ppcmas_tlb_check(env, tlb, &raddr, address, spid)) {
continue;
}
if (sas != ((tlb->mas1 & MAS1_TS) >> MAS1_TS_SHIFT)) {
continue;
}
booke206_tlb_to_mas(env, tlb);
return;
}
}
/* no entry found, fill with defaults */
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_MAS7] = 0;
if (env->spr[SPR_BOOKE_MAS6] & MAS6_SAS) {
env->spr[SPR_BOOKE_MAS1] |= MAS1_TS;
}
env->spr[SPR_BOOKE_MAS1] |= (env->spr[SPR_BOOKE_MAS6] >> 16)
<< 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;
}
static inline void booke206_invalidate_ea_tlb(CPUPPCState *env, int tlbn,
uint32_t ea)
{
int i;
int ways = booke206_tlb_ways(env, tlbn);
target_ulong mask;
for (i = 0; i < ways; i++) {
ppcmas_tlb_t *tlb = booke206_get_tlbm(env, tlbn, ea, i);
if (!tlb) {
continue;
}
mask = ~(booke206_tlb_to_page_size(env, tlb) - 1);
if (((tlb->mas2 & MAS2_EPN_MASK) == (ea & mask)) &&
!(tlb->mas1 & MAS1_IPROT)) {
tlb->mas1 &= ~MAS1_VALID;
}
}
}
void helper_booke206_tlbivax(CPUPPCState *env, target_ulong address)
{
if (address & 0x4) {
/* flush all entries */
if (address & 0x8) {
/* flush all of TLB1 */
booke206_flush_tlb(env, BOOKE206_FLUSH_TLB1, 1);
} else {
/* flush all of TLB0 */
booke206_flush_tlb(env, BOOKE206_FLUSH_TLB0, 0);
}
return;
}
if (address & 0x8) {
/* flush TLB1 entries */
booke206_invalidate_ea_tlb(env, 1, address);
tlb_flush(env, 1);
} else {
/* flush TLB0 entries */
booke206_invalidate_ea_tlb(env, 0, address);
tlb_flush_page(env, address & MAS2_EPN_MASK);
}
}
void helper_booke206_tlbilx0(CPUPPCState *env, target_ulong address)
{
/* XXX missing LPID handling */
booke206_flush_tlb(env, -1, 1);
}
void helper_booke206_tlbilx1(CPUPPCState *env, target_ulong address)
{
int i, j;
int tid = (env->spr[SPR_BOOKE_MAS6] & MAS6_SPID);
ppcmas_tlb_t *tlb = env->tlb.tlbm;
int tlb_size;
/* XXX missing LPID handling */
for (i = 0; i < BOOKE206_MAX_TLBN; i++) {
tlb_size = booke206_tlb_size(env, i);
for (j = 0; j < tlb_size; j++) {
if (!(tlb[j].mas1 & MAS1_IPROT) &&
((tlb[j].mas1 & MAS1_TID_MASK) == tid)) {
tlb[j].mas1 &= ~MAS1_VALID;
}
}
tlb += booke206_tlb_size(env, i);
}
tlb_flush(env, 1);
}
void helper_booke206_tlbilx3(CPUPPCState *env, target_ulong address)
{
int i, j;
ppcmas_tlb_t *tlb;
int tid = (env->spr[SPR_BOOKE_MAS6] & MAS6_SPID);
int pid = tid >> MAS6_SPID_SHIFT;
int sgs = env->spr[SPR_BOOKE_MAS5] & MAS5_SGS;
int ind = (env->spr[SPR_BOOKE_MAS6] & MAS6_SIND) ? MAS1_IND : 0;
/* XXX check for unsupported isize and raise an invalid opcode then */
int size = env->spr[SPR_BOOKE_MAS6] & MAS6_ISIZE_MASK;
/* XXX implement MAV2 handling */
bool mav2 = false;
/* XXX missing LPID handling */
/* flush by pid and ea */
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;
}
if ((ppcmas_tlb_check(env, tlb, NULL, address, pid) != 0) ||
(tlb->mas1 & MAS1_IPROT) ||
((tlb->mas1 & MAS1_IND) != ind) ||
((tlb->mas8 & MAS8_TGS) != sgs)) {
continue;
}
if (mav2 && ((tlb->mas1 & MAS1_TSIZE_MASK) != size)) {
/* XXX only check when MMUCFG[TWC] || TLBnCFG[HES] */
continue;
}
/* XXX e500mc doesn't match SAS, but other cores might */
tlb->mas1 &= ~MAS1_VALID;
}
}
tlb_flush(env, 1);
}
void helper_booke206_tlbflush(CPUPPCState *env, uint32_t type)
{
int flags = 0;
if (type & 2) {
flags |= BOOKE206_FLUSH_TLB1;
}
if (type & 4) {
flags |= BOOKE206_FLUSH_TLB0;
}
booke206_flush_tlb(env, flags, 1);
}
/*****************************************************************************/
#define MMUSUFFIX _mmu
#define SHIFT 0
#include "exec/softmmu_template.h"
#define SHIFT 1
#include "exec/softmmu_template.h"
#define SHIFT 2
#include "exec/softmmu_template.h"
#define SHIFT 3
#include "exec/softmmu_template.h"
/* try to fill the TLB and return an exception if error. If retaddr is
NULL, it means that the function was called in C code (i.e. not
from generated code or from helper.c) */
/* XXX: fix it to restore all registers */
void tlb_fill(CPUPPCState *env, target_ulong addr, int is_write, int mmu_idx,
uintptr_t retaddr)
{
CPUState *cpu = ENV_GET_CPU(env);
PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
int ret;
if (pcc->handle_mmu_fault) {
ret = pcc->handle_mmu_fault(env, addr, is_write, mmu_idx);
} else {
ret = cpu_ppc_handle_mmu_fault(env, addr, is_write, mmu_idx);
}
if (unlikely(ret != 0)) {
if (likely(retaddr)) {
/* now we have a real cpu fault */
cpu_restore_state(env, retaddr);
}
helper_raise_exception_err(env, env->exception_index, env->error_code);
}
}
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