xemu-project/xemu
1
0
Fork 0
mirror of https://github.com/xemu-project/xemu.git synced 2024-11-25 20:49:49 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity
8f7bc27386
xemu/target/sh4/helper.c
Laurent Vivier 98670d47cd accel/tcg: add size paremeter in tlb_fill() 
The MC68040 MMU provides the size of the access that
triggers the page fault.

This size is set in the Special Status Word which
is written in the stack frame of the access fault
exception.

So we need the size in m68k_cpu_unassigned_access() and
m68k_cpu_handle_mmu_fault().

To be able to do that, this patch modifies the prototype of
handle_mmu_fault handler, tlb_fill() and probe_write().
do_unassigned_access() already includes a size parameter.

This patch also updates handle_mmu_fault handlers and
tlb_fill() of all targets (only parameter, no code change).

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20180118193846.24953-2-laurent@vivier.eu>
2018-01-25 16:02:24 +01:00

888 lines
24 KiB
C
Raw Blame History

/*
* SH4 emulation
*
* Copyright (c) 2005 Samuel Tardieu
*
* 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 "qemu/osdep.h"
#include "cpu.h"
#include "exec/exec-all.h"
#include "exec/log.h"
#include "sysemu/sysemu.h"
#if !defined(CONFIG_USER_ONLY)
#include "hw/sh4/sh_intc.h"
#endif
#if defined(CONFIG_USER_ONLY)
void superh_cpu_do_interrupt(CPUState *cs)
{
cs->exception_index = -1;
}
int superh_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int size, int rw,
int mmu_idx)
{
SuperHCPU *cpu = SUPERH_CPU(cs);
CPUSH4State *env = &cpu->env;
env->tea = address;
cs->exception_index = -1;
switch (rw) {
case 0:
cs->exception_index = 0x0a0;
break;
case 1:
cs->exception_index = 0x0c0;
break;
case 2:
cs->exception_index = 0x0a0;
break;
}
return 1;
}
int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr)
{
/* For user mode, only U0 area is cacheable. */
return !(addr & 0x80000000);
}
#else /* !CONFIG_USER_ONLY */
#define MMU_OK 0
#define MMU_ITLB_MISS (-1)
#define MMU_ITLB_MULTIPLE (-2)
#define MMU_ITLB_VIOLATION (-3)
#define MMU_DTLB_MISS_READ (-4)
#define MMU_DTLB_MISS_WRITE (-5)
#define MMU_DTLB_INITIAL_WRITE (-6)
#define MMU_DTLB_VIOLATION_READ (-7)
#define MMU_DTLB_VIOLATION_WRITE (-8)
#define MMU_DTLB_MULTIPLE (-9)
#define MMU_DTLB_MISS (-10)
#define MMU_IADDR_ERROR (-11)
#define MMU_DADDR_ERROR_READ (-12)
#define MMU_DADDR_ERROR_WRITE (-13)
void superh_cpu_do_interrupt(CPUState *cs)
{
SuperHCPU *cpu = SUPERH_CPU(cs);
CPUSH4State *env = &cpu->env;
int do_irq = cs->interrupt_request & CPU_INTERRUPT_HARD;
int do_exp, irq_vector = cs->exception_index;
/* prioritize exceptions over interrupts */
do_exp = cs->exception_index != -1;
do_irq = do_irq && (cs->exception_index == -1);
if (env->sr & (1u << SR_BL)) {
if (do_exp && cs->exception_index != 0x1e0) {
/* In theory a masked exception generates a reset exception,
which in turn jumps to the reset vector. However this only
works when using a bootloader. When using a kernel and an
initrd, they need to be reloaded and the program counter
should be loaded with the kernel entry point.
qemu_system_reset_request takes care of that. */
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
return;
}
if (do_irq && !env->in_sleep) {
return; /* masked */
}
}
env->in_sleep = 0;
if (do_irq) {
irq_vector = sh_intc_get_pending_vector(env->intc_handle,
(env->sr >> 4) & 0xf);
if (irq_vector == -1) {
return; /* masked */
}
}
if (qemu_loglevel_mask(CPU_LOG_INT)) {
const char *expname;
switch (cs->exception_index) {
case 0x0e0:
expname = "addr_error";
break;
case 0x040:
expname = "tlb_miss";
break;
case 0x0a0:
expname = "tlb_violation";
break;
case 0x180:
expname = "illegal_instruction";
break;
case 0x1a0:
expname = "slot_illegal_instruction";
break;
case 0x800:
expname = "fpu_disable";
break;
case 0x820:
expname = "slot_fpu";
break;
case 0x100:
expname = "data_write";
break;
case 0x060:
expname = "dtlb_miss_write";
break;
case 0x0c0:
expname = "dtlb_violation_write";
break;
case 0x120:
expname = "fpu_exception";
break;
case 0x080:
expname = "initial_page_write";
break;
case 0x160:
expname = "trapa";
break;
default:
expname = do_irq ? "interrupt" : "???";
break;
}
qemu_log("exception 0x%03x [%s] raised\n",
irq_vector, expname);
log_cpu_state(cs, 0);
}
env->ssr = cpu_read_sr(env);
env->spc = env->pc;
env->sgr = env->gregs[15];
env->sr |= (1u << SR_BL) | (1u << SR_MD) | (1u << SR_RB);
env->lock_addr = -1;
if (env->flags & DELAY_SLOT_MASK) {
/* Branch instruction should be executed again before delay slot. */
env->spc -= 2;
/* Clear flags for exception/interrupt routine. */
env->flags &= ~DELAY_SLOT_MASK;
}
if (do_exp) {
env->expevt = cs->exception_index;
switch (cs->exception_index) {
case 0x000:
case 0x020:
case 0x140:
env->sr &= ~(1u << SR_FD);
env->sr |= 0xf << 4; /* IMASK */
env->pc = 0xa0000000;
break;
case 0x040:
case 0x060:
env->pc = env->vbr + 0x400;
break;
case 0x160:
env->spc += 2; /* special case for TRAPA */
/* fall through */
default:
env->pc = env->vbr + 0x100;
break;
}
return;
}
if (do_irq) {
env->intevt = irq_vector;
env->pc = env->vbr + 0x600;
return;
}
}
static void update_itlb_use(CPUSH4State * env, int itlbnb)
{
uint8_t or_mask = 0, and_mask = (uint8_t) - 1;
switch (itlbnb) {
case 0:
and_mask = 0x1f;
break;
case 1:
and_mask = 0xe7;
or_mask = 0x80;
break;
case 2:
and_mask = 0xfb;
or_mask = 0x50;
break;
case 3:
or_mask = 0x2c;
break;
}
env->mmucr &= (and_mask << 24) | 0x00ffffff;
env->mmucr |= (or_mask << 24);
}
static int itlb_replacement(CPUSH4State * env)
{
SuperHCPU *cpu = sh_env_get_cpu(env);
if ((env->mmucr & 0xe0000000) == 0xe0000000) {
return 0;
}
if ((env->mmucr & 0x98000000) == 0x18000000) {
return 1;
}
if ((env->mmucr & 0x54000000) == 0x04000000) {
return 2;
}
if ((env->mmucr & 0x2c000000) == 0x00000000) {
return 3;
}
cpu_abort(CPU(cpu), "Unhandled itlb_replacement");
}
/* Find the corresponding entry in the right TLB
Return entry, MMU_DTLB_MISS or MMU_DTLB_MULTIPLE
*/
static int find_tlb_entry(CPUSH4State * env, target_ulong address,
tlb_t * entries, uint8_t nbtlb, int use_asid)
{
int match = MMU_DTLB_MISS;
uint32_t start, end;
uint8_t asid;
int i;
asid = env->pteh & 0xff;
for (i = 0; i < nbtlb; i++) {
if (!entries[i].v)
continue; /* Invalid entry */
if (!entries[i].sh && use_asid && entries[i].asid != asid)
continue; /* Bad ASID */
start = (entries[i].vpn << 10) & ~(entries[i].size - 1);
end = start + entries[i].size - 1;
if (address >= start && address <= end) { /* Match */
if (match != MMU_DTLB_MISS)
return MMU_DTLB_MULTIPLE; /* Multiple match */
match = i;
}
}
return match;
}
static void increment_urc(CPUSH4State * env)
{
uint8_t urb, urc;
/* Increment URC */
urb = ((env->mmucr) >> 18) & 0x3f;
urc = ((env->mmucr) >> 10) & 0x3f;
urc++;
if ((urb > 0 && urc > urb) || urc > (UTLB_SIZE - 1))
urc = 0;
env->mmucr = (env->mmucr & 0xffff03ff) | (urc << 10);
}
/* Copy and utlb entry into itlb
Return entry
*/
static int copy_utlb_entry_itlb(CPUSH4State *env, int utlb)
{
int itlb;
tlb_t * ientry;
itlb = itlb_replacement(env);
ientry = &env->itlb[itlb];
if (ientry->v) {
tlb_flush_page(CPU(sh_env_get_cpu(env)), ientry->vpn << 10);
}
*ientry = env->utlb[utlb];
update_itlb_use(env, itlb);
return itlb;
}
/* Find itlb entry
Return entry, MMU_ITLB_MISS, MMU_ITLB_MULTIPLE or MMU_DTLB_MULTIPLE
*/
static int find_itlb_entry(CPUSH4State * env, target_ulong address,
int use_asid)
{
int e;
e = find_tlb_entry(env, address, env->itlb, ITLB_SIZE, use_asid);
if (e == MMU_DTLB_MULTIPLE) {
e = MMU_ITLB_MULTIPLE;
} else if (e == MMU_DTLB_MISS) {
e = MMU_ITLB_MISS;
} else if (e >= 0) {
update_itlb_use(env, e);
}
return e;
}
/* Find utlb entry
Return entry, MMU_DTLB_MISS, MMU_DTLB_MULTIPLE */
static int find_utlb_entry(CPUSH4State * env, target_ulong address, int use_asid)
{
/* per utlb access */
increment_urc(env);
/* Return entry */
return find_tlb_entry(env, address, env->utlb, UTLB_SIZE, use_asid);
}
/* Match address against MMU
Return MMU_OK, MMU_DTLB_MISS_READ, MMU_DTLB_MISS_WRITE,
MMU_DTLB_INITIAL_WRITE, MMU_DTLB_VIOLATION_READ,
MMU_DTLB_VIOLATION_WRITE, MMU_ITLB_MISS,
MMU_ITLB_MULTIPLE, MMU_ITLB_VIOLATION,
MMU_IADDR_ERROR, MMU_DADDR_ERROR_READ, MMU_DADDR_ERROR_WRITE.
*/
static int get_mmu_address(CPUSH4State * env, target_ulong * physical,
int *prot, target_ulong address,
int rw, int access_type)
{
int use_asid, n;
tlb_t *matching = NULL;
use_asid = !(env->mmucr & MMUCR_SV) || !(env->sr & (1u << SR_MD));
if (rw == 2) {
n = find_itlb_entry(env, address, use_asid);
if (n >= 0) {
matching = &env->itlb[n];
if (!(env->sr & (1u << SR_MD)) && !(matching->pr & 2)) {
n = MMU_ITLB_VIOLATION;
} else {
*prot = PAGE_EXEC;
}
} else {
n = find_utlb_entry(env, address, use_asid);
if (n >= 0) {
n = copy_utlb_entry_itlb(env, n);
matching = &env->itlb[n];
if (!(env->sr & (1u << SR_MD)) && !(matching->pr & 2)) {
n = MMU_ITLB_VIOLATION;
} else {
*prot = PAGE_READ | PAGE_EXEC;
if ((matching->pr & 1) && matching->d) {
*prot |= PAGE_WRITE;
}
}
} else if (n == MMU_DTLB_MULTIPLE) {
n = MMU_ITLB_MULTIPLE;
} else if (n == MMU_DTLB_MISS) {
n = MMU_ITLB_MISS;
}
}
} else {
n = find_utlb_entry(env, address, use_asid);
if (n >= 0) {
matching = &env->utlb[n];
if (!(env->sr & (1u << SR_MD)) && !(matching->pr & 2)) {
n = (rw == 1) ? MMU_DTLB_VIOLATION_WRITE :
MMU_DTLB_VIOLATION_READ;
} else if ((rw == 1) && !(matching->pr & 1)) {
n = MMU_DTLB_VIOLATION_WRITE;
} else if ((rw == 1) && !matching->d) {
n = MMU_DTLB_INITIAL_WRITE;
} else {
*prot = PAGE_READ;
if ((matching->pr & 1) && matching->d) {
*prot |= PAGE_WRITE;
}
}
} else if (n == MMU_DTLB_MISS) {
n = (rw == 1) ? MMU_DTLB_MISS_WRITE :
MMU_DTLB_MISS_READ;
}
}
if (n >= 0) {
n = MMU_OK;
*physical = ((matching->ppn << 10) & ~(matching->size - 1)) |
(address & (matching->size - 1));
}
return n;
}
static int get_physical_address(CPUSH4State * env, target_ulong * physical,
int *prot, target_ulong address,
int rw, int access_type)
{
/* P1, P2 and P4 areas do not use translation */
if ((address >= 0x80000000 && address < 0xc0000000) ||
address >= 0xe0000000) {
if (!(env->sr & (1u << SR_MD))
&& (address < 0xe0000000 || address >= 0xe4000000)) {
/* Unauthorized access in user mode (only store queues are available) */
qemu_log_mask(LOG_GUEST_ERROR, "Unauthorized access\n");
if (rw == 0)
return MMU_DADDR_ERROR_READ;
else if (rw == 1)
return MMU_DADDR_ERROR_WRITE;
else
return MMU_IADDR_ERROR;
}
if (address >= 0x80000000 && address < 0xc0000000) {
/* Mask upper 3 bits for P1 and P2 areas */
*physical = address & 0x1fffffff;
} else {
*physical = address;
}
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
return MMU_OK;
}
/* If MMU is disabled, return the corresponding physical page */
if (!(env->mmucr & MMUCR_AT)) {
*physical = address & 0x1FFFFFFF;
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
return MMU_OK;
}
/* We need to resort to the MMU */
return get_mmu_address(env, physical, prot, address, rw, access_type);
}
int superh_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int size, int rw,
int mmu_idx)
{
SuperHCPU *cpu = SUPERH_CPU(cs);
CPUSH4State *env = &cpu->env;
target_ulong physical;
int prot, ret, access_type;
access_type = ACCESS_INT;
ret =
get_physical_address(env, &physical, &prot, address, rw,
access_type);
if (ret != MMU_OK) {
env->tea = address;
if (ret != MMU_DTLB_MULTIPLE && ret != MMU_ITLB_MULTIPLE) {
env->pteh = (env->pteh & PTEH_ASID_MASK) |
(address & PTEH_VPN_MASK);
}
switch (ret) {
case MMU_ITLB_MISS:
case MMU_DTLB_MISS_READ:
cs->exception_index = 0x040;
break;
case MMU_DTLB_MULTIPLE:
case MMU_ITLB_MULTIPLE:
cs->exception_index = 0x140;
break;
case MMU_ITLB_VIOLATION:
cs->exception_index = 0x0a0;
break;
case MMU_DTLB_MISS_WRITE:
cs->exception_index = 0x060;
break;
case MMU_DTLB_INITIAL_WRITE:
cs->exception_index = 0x080;
break;
case MMU_DTLB_VIOLATION_READ:
cs->exception_index = 0x0a0;
break;
case MMU_DTLB_VIOLATION_WRITE:
cs->exception_index = 0x0c0;
break;
case MMU_IADDR_ERROR:
case MMU_DADDR_ERROR_READ:
cs->exception_index = 0x0e0;
break;
case MMU_DADDR_ERROR_WRITE:
cs->exception_index = 0x100;
break;
default:
cpu_abort(cs, "Unhandled MMU fault");
}
return 1;
}
address &= TARGET_PAGE_MASK;
physical &= TARGET_PAGE_MASK;
tlb_set_page(cs, address, physical, prot, mmu_idx, TARGET_PAGE_SIZE);
return 0;
}
hwaddr superh_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
{
SuperHCPU *cpu = SUPERH_CPU(cs);
target_ulong physical;
int prot;
get_physical_address(&cpu->env, &physical, &prot, addr, 0, 0);
return physical;
}
void cpu_load_tlb(CPUSH4State * env)
{
SuperHCPU *cpu = sh_env_get_cpu(env);
int n = cpu_mmucr_urc(env->mmucr);
tlb_t * entry = &env->utlb[n];
if (entry->v) {
/* Overwriting valid entry in utlb. */
target_ulong address = entry->vpn << 10;
tlb_flush_page(CPU(cpu), address);
}
/* Take values into cpu status from registers. */
entry->asid = (uint8_t)cpu_pteh_asid(env->pteh);
entry->vpn = cpu_pteh_vpn(env->pteh);
entry->v = (uint8_t)cpu_ptel_v(env->ptel);
entry->ppn = cpu_ptel_ppn(env->ptel);
entry->sz = (uint8_t)cpu_ptel_sz(env->ptel);
switch (entry->sz) {
case 0: /* 00 */
entry->size = 1024; /* 1K */
break;
case 1: /* 01 */
entry->size = 1024 * 4; /* 4K */
break;
case 2: /* 10 */
entry->size = 1024 * 64; /* 64K */
break;
case 3: /* 11 */
entry->size = 1024 * 1024; /* 1M */
break;
default:
cpu_abort(CPU(cpu), "Unhandled load_tlb");
break;
}
entry->sh = (uint8_t)cpu_ptel_sh(env->ptel);
entry->c = (uint8_t)cpu_ptel_c(env->ptel);
entry->pr = (uint8_t)cpu_ptel_pr(env->ptel);
entry->d = (uint8_t)cpu_ptel_d(env->ptel);
entry->wt = (uint8_t)cpu_ptel_wt(env->ptel);
entry->sa = (uint8_t)cpu_ptea_sa(env->ptea);
entry->tc = (uint8_t)cpu_ptea_tc(env->ptea);
}
void cpu_sh4_invalidate_tlb(CPUSH4State *s)
{
int i;
/* UTLB */
for (i = 0; i < UTLB_SIZE; i++) {
tlb_t * entry = &s->utlb[i];
entry->v = 0;
}
/* ITLB */
for (i = 0; i < ITLB_SIZE; i++) {
tlb_t * entry = &s->itlb[i];
entry->v = 0;
}
tlb_flush(CPU(sh_env_get_cpu(s)));
}
uint32_t cpu_sh4_read_mmaped_itlb_addr(CPUSH4State *s,
hwaddr addr)
{
int index = (addr & 0x00000300) >> 8;
tlb_t * entry = &s->itlb[index];
return (entry->vpn << 10) |
(entry->v << 8) |
(entry->asid);
}
void cpu_sh4_write_mmaped_itlb_addr(CPUSH4State *s, hwaddr addr,
uint32_t mem_value)
{
uint32_t vpn = (mem_value & 0xfffffc00) >> 10;
uint8_t v = (uint8_t)((mem_value & 0x00000100) >> 8);
uint8_t asid = (uint8_t)(mem_value & 0x000000ff);
int index = (addr & 0x00000300) >> 8;
tlb_t * entry = &s->itlb[index];
if (entry->v) {
/* Overwriting valid entry in itlb. */
target_ulong address = entry->vpn << 10;
tlb_flush_page(CPU(sh_env_get_cpu(s)), address);
}
entry->asid = asid;
entry->vpn = vpn;
entry->v = v;
}
uint32_t cpu_sh4_read_mmaped_itlb_data(CPUSH4State *s,
hwaddr addr)
{
int array = (addr & 0x00800000) >> 23;
int index = (addr & 0x00000300) >> 8;
tlb_t * entry = &s->itlb[index];
if (array == 0) {
/* ITLB Data Array 1 */
return (entry->ppn << 10) |
(entry->v << 8) |
(entry->pr << 5) |
((entry->sz & 1) << 6) |
((entry->sz & 2) << 4) |
(entry->c << 3) |
(entry->sh << 1);
} else {
/* ITLB Data Array 2 */
return (entry->tc << 1) |
(entry->sa);
}
}
void cpu_sh4_write_mmaped_itlb_data(CPUSH4State *s, hwaddr addr,
uint32_t mem_value)
{
int array = (addr & 0x00800000) >> 23;
int index = (addr & 0x00000300) >> 8;
tlb_t * entry = &s->itlb[index];
if (array == 0) {
/* ITLB Data Array 1 */
if (entry->v) {
/* Overwriting valid entry in utlb. */
target_ulong address = entry->vpn << 10;
tlb_flush_page(CPU(sh_env_get_cpu(s)), address);
}
entry->ppn = (mem_value & 0x1ffffc00) >> 10;
entry->v = (mem_value & 0x00000100) >> 8;
entry->sz = (mem_value & 0x00000080) >> 6 |
(mem_value & 0x00000010) >> 4;
entry->pr = (mem_value & 0x00000040) >> 5;
entry->c = (mem_value & 0x00000008) >> 3;
entry->sh = (mem_value & 0x00000002) >> 1;
} else {
/* ITLB Data Array 2 */
entry->tc = (mem_value & 0x00000008) >> 3;
entry->sa = (mem_value & 0x00000007);
}
}
uint32_t cpu_sh4_read_mmaped_utlb_addr(CPUSH4State *s,
hwaddr addr)
{
int index = (addr & 0x00003f00) >> 8;
tlb_t * entry = &s->utlb[index];
increment_urc(s); /* per utlb access */
return (entry->vpn << 10) |
(entry->v << 8) |
(entry->asid);
}
void cpu_sh4_write_mmaped_utlb_addr(CPUSH4State *s, hwaddr addr,
uint32_t mem_value)
{
int associate = addr & 0x0000080;
uint32_t vpn = (mem_value & 0xfffffc00) >> 10;
uint8_t d = (uint8_t)((mem_value & 0x00000200) >> 9);
uint8_t v = (uint8_t)((mem_value & 0x00000100) >> 8);
uint8_t asid = (uint8_t)(mem_value & 0x000000ff);
int use_asid = !(s->mmucr & MMUCR_SV) || !(s->sr & (1u << SR_MD));
if (associate) {
int i;
tlb_t * utlb_match_entry = NULL;
int needs_tlb_flush = 0;
/* search UTLB */
for (i = 0; i < UTLB_SIZE; i++) {
tlb_t * entry = &s->utlb[i];
if (!entry->v)
continue;
if (entry->vpn == vpn
&& (!use_asid || entry->asid == asid || entry->sh)) {
if (utlb_match_entry) {
CPUState *cs = CPU(sh_env_get_cpu(s));
/* Multiple TLB Exception */
cs->exception_index = 0x140;
s->tea = addr;
break;
}
if (entry->v && !v)
needs_tlb_flush = 1;
entry->v = v;
entry->d = d;
utlb_match_entry = entry;
}
increment_urc(s); /* per utlb access */
}
/* search ITLB */
for (i = 0; i < ITLB_SIZE; i++) {
tlb_t * entry = &s->itlb[i];
if (entry->vpn == vpn
&& (!use_asid || entry->asid == asid || entry->sh)) {
if (entry->v && !v)
needs_tlb_flush = 1;
if (utlb_match_entry)
*entry = *utlb_match_entry;
else
entry->v = v;
break;
}
}
if (needs_tlb_flush) {
tlb_flush_page(CPU(sh_env_get_cpu(s)), vpn << 10);
}
} else {
int index = (addr & 0x00003f00) >> 8;
tlb_t * entry = &s->utlb[index];
if (entry->v) {
CPUState *cs = CPU(sh_env_get_cpu(s));
/* Overwriting valid entry in utlb. */
target_ulong address = entry->vpn << 10;
tlb_flush_page(cs, address);
}
entry->asid = asid;
entry->vpn = vpn;
entry->d = d;
entry->v = v;
increment_urc(s);
}
}
uint32_t cpu_sh4_read_mmaped_utlb_data(CPUSH4State *s,
hwaddr addr)
{
int array = (addr & 0x00800000) >> 23;
int index = (addr & 0x00003f00) >> 8;
tlb_t * entry = &s->utlb[index];
increment_urc(s); /* per utlb access */
if (array == 0) {
/* ITLB Data Array 1 */
return (entry->ppn << 10) |
(entry->v << 8) |
(entry->pr << 5) |
((entry->sz & 1) << 6) |
((entry->sz & 2) << 4) |
(entry->c << 3) |
(entry->d << 2) |
(entry->sh << 1) |
(entry->wt);
} else {
/* ITLB Data Array 2 */
return (entry->tc << 1) |
(entry->sa);
}
}
void cpu_sh4_write_mmaped_utlb_data(CPUSH4State *s, hwaddr addr,
uint32_t mem_value)
{
int array = (addr & 0x00800000) >> 23;
int index = (addr & 0x00003f00) >> 8;
tlb_t * entry = &s->utlb[index];
increment_urc(s); /* per utlb access */
if (array == 0) {
/* UTLB Data Array 1 */
if (entry->v) {
/* Overwriting valid entry in utlb. */
target_ulong address = entry->vpn << 10;
tlb_flush_page(CPU(sh_env_get_cpu(s)), address);
}
entry->ppn = (mem_value & 0x1ffffc00) >> 10;
entry->v = (mem_value & 0x00000100) >> 8;
entry->sz = (mem_value & 0x00000080) >> 6 |
(mem_value & 0x00000010) >> 4;
entry->pr = (mem_value & 0x00000060) >> 5;
entry->c = (mem_value & 0x00000008) >> 3;
entry->d = (mem_value & 0x00000004) >> 2;
entry->sh = (mem_value & 0x00000002) >> 1;
entry->wt = (mem_value & 0x00000001);
} else {
/* UTLB Data Array 2 */
entry->tc = (mem_value & 0x00000008) >> 3;
entry->sa = (mem_value & 0x00000007);
}
}
int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr)
{
int n;
int use_asid = !(env->mmucr & MMUCR_SV) || !(env->sr & (1u << SR_MD));
/* check area */
if (env->sr & (1u << SR_MD)) {
/* For privileged mode, P2 and P4 area is not cacheable. */
if ((0xA0000000 <= addr && addr < 0xC0000000) || 0xE0000000 <= addr)
return 0;
} else {
/* For user mode, only U0 area is cacheable. */
if (0x80000000 <= addr)
return 0;
}
/*
* TODO : Evaluate CCR and check if the cache is on or off.
* Now CCR is not in CPUSH4State, but in SH7750State.
* When you move the ccr into CPUSH4State, the code will be
* as follows.
*/
#if 0
/* check if operand cache is enabled or not. */
if (!(env->ccr & 1))
return 0;
#endif
/* if MMU is off, no check for TLB. */
if (env->mmucr & MMUCR_AT)
return 1;
/* check TLB */
n = find_tlb_entry(env, addr, env->itlb, ITLB_SIZE, use_asid);
if (n >= 0)
return env->itlb[n].c;
n = find_tlb_entry(env, addr, env->utlb, UTLB_SIZE, use_asid);
if (n >= 0)
return env->utlb[n].c;
return 0;
}
#endif
bool superh_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
{
if (interrupt_request & CPU_INTERRUPT_HARD) {
SuperHCPU *cpu = SUPERH_CPU(cs);
CPUSH4State *env = &cpu->env;
/* Delay slots are indivisible, ignore interrupts */
if (env->flags & DELAY_SLOT_MASK) {
return false;
} else {
superh_cpu_do_interrupt(cs);
return true;
}
}
return false;
}
Reference in New Issue View Git Blame Copy Permalink