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s390x/mmu: Move mmu_translate() and friends to separate file 

helper.c is quite overcrowded already, so let's move the MMU
translation to a separate file instead (like it has been done
with the other targets already).

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Acked-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
master
Thomas Huth 2015-02-12 18:09:18 +01:00 committed by Christian Borntraeger
parent 2e13fbe42d
commit dfebd7a7a9
4 changed files with 359 additions and 323 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
target-s390x/Makefile.objs
View File

@ -1,5 +1,5 @@
obj-y += translate.o helper.o cpu.o interrupt.o
obj-y += int_helper.o fpu_helper.o cc_helper.o mem_helper.o misc_helper.o
obj-y += gdbstub.o
obj-$(CONFIG_SOFTMMU) += machine.o ioinst.o arch_dump.o
obj-$(CONFIG_SOFTMMU) += machine.o ioinst.o arch_dump.o mmu_helper.o
obj-$(CONFIG_KVM) += kvm.o

1
target-s390x/cpu.h
View File

@ -331,6 +331,7 @@ static inline int get_ilen(uint8_t opc)
to re-compute the length by examining the insn in memory. */
#define ILEN_LATER 0x20
#define ILEN_LATER_INC 0x21
void trigger_pgm_exception(CPUS390XState *env, uint32_t code, uint32_t ilen);
#endif
S390CPU *cpu_s390x_init(const char *cpu_model);

323
target-s390x/helper.c
View File

@ -27,7 +27,6 @@
#endif
//#define DEBUG_S390
//#define DEBUG_S390_PTE
//#define DEBUG_S390_STDOUT
#ifdef DEBUG_S390
@ -44,12 +43,6 @@
do { } while (0)
#endif
#ifdef DEBUG_S390_PTE
#define PTE_DPRINTF DPRINTF
#else
#define PTE_DPRINTF(fmt, ...) \
do { } while (0)
#endif
#ifndef CONFIG_USER_ONLY
void s390x_tod_timer(void *opaque)
@ -105,8 +98,7 @@ int s390_cpu_handle_mmu_fault(CPUState *cs, vaddr address,
#else /* !CONFIG_USER_ONLY */
/* Ensure to exit the TB after this call! */
static void trigger_pgm_exception(CPUS390XState *env, uint32_t code,
uint32_t ilen)
void trigger_pgm_exception(CPUS390XState *env, uint32_t code, uint32_t ilen)
{
CPUState *cs = CPU(s390_env_get_cpu(env));
@ -115,319 +107,6 @@ static void trigger_pgm_exception(CPUS390XState *env, uint32_t code,
env->int_pgm_ilen = ilen;
}
static int trans_bits(CPUS390XState *env, uint64_t mode)
{
S390CPU *cpu = s390_env_get_cpu(env);
int bits = 0;
switch (mode) {
case PSW_ASC_PRIMARY:
bits = 1;
break;
case PSW_ASC_SECONDARY:
bits = 2;
break;
case PSW_ASC_HOME:
bits = 3;
break;
default:
cpu_abort(CPU(cpu), "unknown asc mode\n");
break;
}
return bits;
}
static void trigger_prot_fault(CPUS390XState *env, target_ulong vaddr,
uint64_t mode)
{
CPUState *cs = CPU(s390_env_get_cpu(env));
int ilen = ILEN_LATER_INC;
int bits = trans_bits(env, mode) | 4;
DPRINTF("%s: vaddr=%016" PRIx64 " bits=%d\n", __func__, vaddr, bits);
stq_phys(cs->as,
env->psa + offsetof(LowCore, trans_exc_code), vaddr | bits);
trigger_pgm_exception(env, PGM_PROTECTION, ilen);
}
static void trigger_page_fault(CPUS390XState *env, target_ulong vaddr,
uint32_t type, uint64_t asc, int rw)
{
CPUState *cs = CPU(s390_env_get_cpu(env));
int ilen = ILEN_LATER;
int bits = trans_bits(env, asc);
/* Code accesses have an undefined ilc. */
if (rw == 2) {
ilen = 2;
}
DPRINTF("%s: vaddr=%016" PRIx64 " bits=%d\n", __func__, vaddr, bits);
stq_phys(cs->as,
env->psa + offsetof(LowCore, trans_exc_code), vaddr | bits);
trigger_pgm_exception(env, type, ilen);
}
/**
* Translate real address to absolute (= physical)
* address by taking care of the prefix mapping.
*/
static target_ulong mmu_real2abs(CPUS390XState *env, target_ulong raddr)
{
if (raddr < 0x2000) {
return raddr + env->psa; /* Map the lowcore. */
} else if (raddr >= env->psa && raddr < env->psa + 0x2000) {
return raddr - env->psa; /* Map the 0 page. */
}
return raddr;
}
/* Decode page table entry (normal 4KB page) */
static int mmu_translate_pte(CPUS390XState *env, target_ulong vaddr,
uint64_t asc, uint64_t asce,
target_ulong *raddr, int *flags, int rw)
{
if (asce & _PAGE_INVALID) {
DPRINTF("%s: PTE=0x%" PRIx64 " invalid\n", __func__, asce);
trigger_page_fault(env, vaddr, PGM_PAGE_TRANS, asc, rw);
return -1;
}
if (asce & _PAGE_RO) {
*flags &= ~PAGE_WRITE;
}
*raddr = asce & _ASCE_ORIGIN;
PTE_DPRINTF("%s: PTE=0x%" PRIx64 "\n", __func__, asce);
return 0;
}
/* Decode EDAT1 segment frame absolute address (1MB page) */
static int mmu_translate_sfaa(CPUS390XState *env, target_ulong vaddr,
uint64_t asc, uint64_t asce, target_ulong *raddr,
int *flags, int rw)
{
if (asce & _SEGMENT_ENTRY_INV) {
DPRINTF("%s: SEG=0x%" PRIx64 " invalid\n", __func__, asce);
trigger_page_fault(env, vaddr, PGM_SEGMENT_TRANS, asc, rw);
return -1;
}
if (asce & _SEGMENT_ENTRY_RO) {
*flags &= ~PAGE_WRITE;
}
*raddr = (asce & 0xfffffffffff00000ULL) | (vaddr & 0xfffff);
PTE_DPRINTF("%s: SEG=0x%" PRIx64 "\n", __func__, asce);
return 0;
}
static int mmu_translate_asce(CPUS390XState *env, target_ulong vaddr,
uint64_t asc, uint64_t asce, int level,
target_ulong *raddr, int *flags, int rw)
{
CPUState *cs = CPU(s390_env_get_cpu(env));
uint64_t offs = 0;
uint64_t origin;
uint64_t new_asce;
PTE_DPRINTF("%s: 0x%" PRIx64 "\n", __func__, asce);
if (((level != _ASCE_TYPE_SEGMENT) && (asce & _REGION_ENTRY_INV)) ||
((level == _ASCE_TYPE_SEGMENT) && (asce & _SEGMENT_ENTRY_INV))) {
/* XXX different regions have different faults */
DPRINTF("%s: invalid region\n", __func__);
trigger_page_fault(env, vaddr, PGM_SEGMENT_TRANS, asc, rw);
return -1;
}
if ((level <= _ASCE_TYPE_MASK) && ((asce & _ASCE_TYPE_MASK) != level)) {
trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
return -1;
}
if (asce & _ASCE_REAL_SPACE) {
/* direct mapping */
*raddr = vaddr;
return 0;
}
origin = asce & _ASCE_ORIGIN;
switch (level) {
case _ASCE_TYPE_REGION1 + 4:
offs = (vaddr >> 50) & 0x3ff8;
break;
case _ASCE_TYPE_REGION1:
offs = (vaddr >> 39) & 0x3ff8;
break;
case _ASCE_TYPE_REGION2:
offs = (vaddr >> 28) & 0x3ff8;
break;
case _ASCE_TYPE_REGION3:
offs = (vaddr >> 17) & 0x3ff8;
break;
case _ASCE_TYPE_SEGMENT:
offs = (vaddr >> 9) & 0x07f8;
origin = asce & _SEGMENT_ENTRY_ORIGIN;
break;
}
/* XXX region protection flags */
/* *flags &= ~PAGE_WRITE */
new_asce = ldq_phys(cs->as, origin + offs);
PTE_DPRINTF("%s: 0x%" PRIx64 " + 0x%" PRIx64 " => 0x%016" PRIx64 "\n",
__func__, origin, offs, new_asce);
if (level == _ASCE_TYPE_SEGMENT) {
/* 4KB page */
return mmu_translate_pte(env, vaddr, asc, new_asce, raddr, flags, rw);
} else if (level - 4 == _ASCE_TYPE_SEGMENT &&
(new_asce & _SEGMENT_ENTRY_FC) && (env->cregs[0] & CR0_EDAT)) {
/* 1MB page */
return mmu_translate_sfaa(env, vaddr, asc, new_asce, raddr, flags, rw);
} else {
/* yet another region */
return mmu_translate_asce(env, vaddr, asc, new_asce, level - 4, raddr,
flags, rw);
}
}
static int mmu_translate_asc(CPUS390XState *env, target_ulong vaddr,
uint64_t asc, target_ulong *raddr, int *flags,
int rw)
{
uint64_t asce = 0;
int level, new_level;
int r;
switch (asc) {
case PSW_ASC_PRIMARY:
PTE_DPRINTF("%s: asc=primary\n", __func__);
asce = env->cregs[1];
break;
case PSW_ASC_SECONDARY:
PTE_DPRINTF("%s: asc=secondary\n", __func__);
asce = env->cregs[7];
break;
case PSW_ASC_HOME:
PTE_DPRINTF("%s: asc=home\n", __func__);
asce = env->cregs[13];
break;
}
switch (asce & _ASCE_TYPE_MASK) {
case _ASCE_TYPE_REGION1:
break;
case _ASCE_TYPE_REGION2:
if (vaddr & 0xffe0000000000000ULL) {
DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
" 0xffe0000000000000ULL\n", __func__, vaddr);
trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
return -1;
}
break;
case _ASCE_TYPE_REGION3:
if (vaddr & 0xfffffc0000000000ULL) {
DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
" 0xfffffc0000000000ULL\n", __func__, vaddr);
trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
return -1;
}
break;
case _ASCE_TYPE_SEGMENT:
if (vaddr & 0xffffffff80000000ULL) {
DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
" 0xffffffff80000000ULL\n", __func__, vaddr);
trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
return -1;
}
break;
}
/* fake level above current */
level = asce & _ASCE_TYPE_MASK;
new_level = level + 4;
asce = (asce & ~_ASCE_TYPE_MASK) | (new_level & _ASCE_TYPE_MASK);
r = mmu_translate_asce(env, vaddr, asc, asce, new_level, raddr, flags, rw);
if ((rw == 1) && !(*flags & PAGE_WRITE)) {
trigger_prot_fault(env, vaddr, asc);
return -1;
}
return r;
}
int mmu_translate(CPUS390XState *env, target_ulong vaddr, int rw, uint64_t asc,
target_ulong *raddr, int *flags)
{
int r = -1;
uint8_t *sk;
*flags = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
vaddr &= TARGET_PAGE_MASK;
if (!(env->psw.mask & PSW_MASK_DAT)) {
*raddr = vaddr;
r = 0;
goto out;
}
switch (asc) {
case PSW_ASC_PRIMARY:
case PSW_ASC_HOME:
r = mmu_translate_asc(env, vaddr, asc, raddr, flags, rw);
break;
case PSW_ASC_SECONDARY:
/*
* Instruction: Primary
* Data: Secondary
*/
if (rw == 2) {
r = mmu_translate_asc(env, vaddr, PSW_ASC_PRIMARY, raddr, flags,
rw);
*flags &= ~(PAGE_READ | PAGE_WRITE);
} else {
r = mmu_translate_asc(env, vaddr, PSW_ASC_SECONDARY, raddr, flags,
rw);
*flags &= ~(PAGE_EXEC);
}
break;
case PSW_ASC_ACCREG:
default:
hw_error("guest switched to unknown asc mode\n");
break;
}
out:
/* Convert real address -> absolute address */
*raddr = mmu_real2abs(env, *raddr);
if (*raddr <= ram_size) {
sk = &env->storage_keys[*raddr / TARGET_PAGE_SIZE];
if (*flags & PAGE_READ) {
*sk |= SK_R;
}
if (*flags & PAGE_WRITE) {
*sk |= SK_C;
}
}
return r;
}
int s390_cpu_handle_mmu_fault(CPUState *cs, vaddr orig_vaddr,
int rw, int mmu_idx)
{

356
target-s390x/mmu_helper.c Normal file
View File

@ -0,0 +1,356 @@
/*
* S390x MMU related functions
*
* Copyright (c) 2011 Alexander Graf
* Copyright (c) 2015 Thomas Huth, IBM Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*/
#include "cpu.h"
/* #define DEBUG_S390 */
/* #define DEBUG_S390_PTE */
/* #define DEBUG_S390_STDOUT */
#ifdef DEBUG_S390
#ifdef DEBUG_S390_STDOUT
#define DPRINTF(fmt, ...) \
do { fprintf(stderr, fmt, ## __VA_ARGS__); \
qemu_log(fmt, ##__VA_ARGS__); } while (0)
#else
#define DPRINTF(fmt, ...) \
do { qemu_log(fmt, ## __VA_ARGS__); } while (0)
#endif
#else
#define DPRINTF(fmt, ...) \
do { } while (0)
#endif
#ifdef DEBUG_S390_PTE
#define PTE_DPRINTF DPRINTF
#else
#define PTE_DPRINTF(fmt, ...) \
do { } while (0)
#endif
static int trans_bits(CPUS390XState *env, uint64_t mode)
{
S390CPU *cpu = s390_env_get_cpu(env);
int bits = 0;
switch (mode) {
case PSW_ASC_PRIMARY:
bits = 1;
break;
case PSW_ASC_SECONDARY:
bits = 2;
break;
case PSW_ASC_HOME:
bits = 3;
break;
default:
cpu_abort(CPU(cpu), "unknown asc mode\n");
break;
}
return bits;
}
static void trigger_prot_fault(CPUS390XState *env, target_ulong vaddr,
uint64_t mode)
{
CPUState *cs = CPU(s390_env_get_cpu(env));
int ilen = ILEN_LATER_INC;
int bits = trans_bits(env, mode) | 4;
DPRINTF("%s: vaddr=%016" PRIx64 " bits=%d\n", __func__, vaddr, bits);
stq_phys(cs->as,
env->psa + offsetof(LowCore, trans_exc_code), vaddr | bits);
trigger_pgm_exception(env, PGM_PROTECTION, ilen);
}
static void trigger_page_fault(CPUS390XState *env, target_ulong vaddr,
uint32_t type, uint64_t asc, int rw)
{
CPUState *cs = CPU(s390_env_get_cpu(env));
int ilen = ILEN_LATER;
int bits = trans_bits(env, asc);
/* Code accesses have an undefined ilc. */
if (rw == 2) {
ilen = 2;
}
DPRINTF("%s: vaddr=%016" PRIx64 " bits=%d\n", __func__, vaddr, bits);
stq_phys(cs->as,
env->psa + offsetof(LowCore, trans_exc_code), vaddr | bits);
trigger_pgm_exception(env, type, ilen);
}
/**
* Translate real address to absolute (= physical)
* address by taking care of the prefix mapping.
*/
static target_ulong mmu_real2abs(CPUS390XState *env, target_ulong raddr)
{
if (raddr < 0x2000) {
return raddr + env->psa; /* Map the lowcore. */
} else if (raddr >= env->psa && raddr < env->psa + 0x2000) {
return raddr - env->psa; /* Map the 0 page. */
}
return raddr;
}
/* Decode page table entry (normal 4KB page) */
static int mmu_translate_pte(CPUS390XState *env, target_ulong vaddr,
uint64_t asc, uint64_t asce,
target_ulong *raddr, int *flags, int rw)
{
if (asce & _PAGE_INVALID) {
DPRINTF("%s: PTE=0x%" PRIx64 " invalid\n", __func__, asce);
trigger_page_fault(env, vaddr, PGM_PAGE_TRANS, asc, rw);
return -1;
}
if (asce & _PAGE_RO) {
*flags &= ~PAGE_WRITE;
}
*raddr = asce & _ASCE_ORIGIN;
PTE_DPRINTF("%s: PTE=0x%" PRIx64 "\n", __func__, asce);
return 0;
}
/* Decode EDAT1 segment frame absolute address (1MB page) */
static int mmu_translate_sfaa(CPUS390XState *env, target_ulong vaddr,
uint64_t asc, uint64_t asce, target_ulong *raddr,
int *flags, int rw)
{
if (asce & _SEGMENT_ENTRY_INV) {
DPRINTF("%s: SEG=0x%" PRIx64 " invalid\n", __func__, asce);
trigger_page_fault(env, vaddr, PGM_SEGMENT_TRANS, asc, rw);
return -1;
}
if (asce & _SEGMENT_ENTRY_RO) {
*flags &= ~PAGE_WRITE;
}
*raddr = (asce & 0xfffffffffff00000ULL) | (vaddr & 0xfffff);
PTE_DPRINTF("%s: SEG=0x%" PRIx64 "\n", __func__, asce);
return 0;
}
static int mmu_translate_asce(CPUS390XState *env, target_ulong vaddr,
uint64_t asc, uint64_t asce, int level,
target_ulong *raddr, int *flags, int rw)
{
CPUState *cs = CPU(s390_env_get_cpu(env));
uint64_t offs = 0;
uint64_t origin;
uint64_t new_asce;
PTE_DPRINTF("%s: 0x%" PRIx64 "\n", __func__, asce);
if (((level != _ASCE_TYPE_SEGMENT) && (asce & _REGION_ENTRY_INV)) ||
((level == _ASCE_TYPE_SEGMENT) && (asce & _SEGMENT_ENTRY_INV))) {
/* XXX different regions have different faults */
DPRINTF("%s: invalid region\n", __func__);
trigger_page_fault(env, vaddr, PGM_SEGMENT_TRANS, asc, rw);
return -1;
}
if ((level <= _ASCE_TYPE_MASK) && ((asce & _ASCE_TYPE_MASK) != level)) {
trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
return -1;
}
if (asce & _ASCE_REAL_SPACE) {
/* direct mapping */
*raddr = vaddr;
return 0;
}
origin = asce & _ASCE_ORIGIN;
switch (level) {
case _ASCE_TYPE_REGION1 + 4:
offs = (vaddr >> 50) & 0x3ff8;
break;
case _ASCE_TYPE_REGION1:
offs = (vaddr >> 39) & 0x3ff8;
break;
case _ASCE_TYPE_REGION2:
offs = (vaddr >> 28) & 0x3ff8;
break;
case _ASCE_TYPE_REGION3:
offs = (vaddr >> 17) & 0x3ff8;
break;
case _ASCE_TYPE_SEGMENT:
offs = (vaddr >> 9) & 0x07f8;
origin = asce & _SEGMENT_ENTRY_ORIGIN;
break;
}
/* XXX region protection flags */
/* *flags &= ~PAGE_WRITE */
new_asce = ldq_phys(cs->as, origin + offs);
PTE_DPRINTF("%s: 0x%" PRIx64 " + 0x%" PRIx64 " => 0x%016" PRIx64 "\n",
__func__, origin, offs, new_asce);
if (level == _ASCE_TYPE_SEGMENT) {
/* 4KB page */
return mmu_translate_pte(env, vaddr, asc, new_asce, raddr, flags, rw);
} else if (level - 4 == _ASCE_TYPE_SEGMENT &&
(new_asce & _SEGMENT_ENTRY_FC) && (env->cregs[0] & CR0_EDAT)) {
/* 1MB page */
return mmu_translate_sfaa(env, vaddr, asc, new_asce, raddr, flags, rw);
} else {
/* yet another region */
return mmu_translate_asce(env, vaddr, asc, new_asce, level - 4, raddr,
flags, rw);
}
}
static int mmu_translate_asc(CPUS390XState *env, target_ulong vaddr,
uint64_t asc, target_ulong *raddr, int *flags,
int rw)
{
uint64_t asce = 0;
int level, new_level;
int r;
switch (asc) {
case PSW_ASC_PRIMARY:
PTE_DPRINTF("%s: asc=primary\n", __func__);
asce = env->cregs[1];
break;
case PSW_ASC_SECONDARY:
PTE_DPRINTF("%s: asc=secondary\n", __func__);
asce = env->cregs[7];
break;
case PSW_ASC_HOME:
PTE_DPRINTF("%s: asc=home\n", __func__);
asce = env->cregs[13];
break;
}
switch (asce & _ASCE_TYPE_MASK) {
case _ASCE_TYPE_REGION1:
break;
case _ASCE_TYPE_REGION2:
if (vaddr & 0xffe0000000000000ULL) {
DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
" 0xffe0000000000000ULL\n", __func__, vaddr);
trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
return -1;
}
break;
case _ASCE_TYPE_REGION3:
if (vaddr & 0xfffffc0000000000ULL) {
DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
" 0xfffffc0000000000ULL\n", __func__, vaddr);
trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
return -1;
}
break;
case _ASCE_TYPE_SEGMENT:
if (vaddr & 0xffffffff80000000ULL) {
DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
" 0xffffffff80000000ULL\n", __func__, vaddr);
trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
return -1;
}
break;
}
/* fake level above current */
level = asce & _ASCE_TYPE_MASK;
new_level = level + 4;
asce = (asce & ~_ASCE_TYPE_MASK) | (new_level & _ASCE_TYPE_MASK);
r = mmu_translate_asce(env, vaddr, asc, asce, new_level, raddr, flags, rw);
if ((rw == 1) && !(*flags & PAGE_WRITE)) {
trigger_prot_fault(env, vaddr, asc);
return -1;
}
return r;
}
int mmu_translate(CPUS390XState *env, target_ulong vaddr, int rw, uint64_t asc,
target_ulong *raddr, int *flags)
{
int r = -1;
uint8_t *sk;
*flags = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
vaddr &= TARGET_PAGE_MASK;
if (!(env->psw.mask & PSW_MASK_DAT)) {
*raddr = vaddr;
r = 0;
goto out;
}
switch (asc) {
case PSW_ASC_PRIMARY:
case PSW_ASC_HOME:
r = mmu_translate_asc(env, vaddr, asc, raddr, flags, rw);
break;
case PSW_ASC_SECONDARY:
/*
* Instruction: Primary
* Data: Secondary
*/
if (rw == 2) {
r = mmu_translate_asc(env, vaddr, PSW_ASC_PRIMARY, raddr, flags,
rw);
*flags &= ~(PAGE_READ | PAGE_WRITE);
} else {
r = mmu_translate_asc(env, vaddr, PSW_ASC_SECONDARY, raddr, flags,
rw);
*flags &= ~(PAGE_EXEC);
}
break;
case PSW_ASC_ACCREG:
default:
hw_error("guest switched to unknown asc mode\n");
break;
}
out:
/* Convert real address -> absolute address */
*raddr = mmu_real2abs(env, *raddr);
if (*raddr <= ram_size) {
sk = &env->storage_keys[*raddr / TARGET_PAGE_SIZE];
if (*flags & PAGE_READ) {
*sk |= SK_R;
}
if (*flags & PAGE_WRITE) {
*sk |= SK_C;
}
}
return r;
}