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qemu-patch-raspberry4/target-alpha/helper.c
j_mayer 6ebbf39000 Replace is_user variable with mmu_idx in softmmu core, 
allowing support of more than 2 mmu access modes.
Add backward compatibility is_user variable in targets code when needed.
Implement per target cpu_mmu_index function, avoiding duplicated code
  and #ifdef TARGET_xxx in softmmu core functions.
Implement per target mmu modes definitions. As an example, add PowerPC
  hypervisor mode definition and Alpha executive and kernel modes definitions.
Optimize PowerPC case, precomputing mmu_idx when MSR register changes
  and using the same definition in code translation code.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3384 c046a42c-6fe2-441c-8c8c-71466251a162
2007-10-14 07:07:08 +00:00

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/*
* Alpha emulation cpu helpers for qemu.
*
* Copyright (c) 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include "cpu.h"
#include "exec-all.h"
#if defined(CONFIG_USER_ONLY)
int cpu_alpha_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
int mmu_idx, int is_softmmu)
{
if (rw == 2)
env->exception_index = EXCP_ITB_MISS;
else
env->exception_index = EXCP_DFAULT;
env->ipr[IPR_EXC_ADDR] = address;
return 1;
}
target_phys_addr_t cpu_get_phys_page_debug (CPUState *env, target_ulong addr)
{
return addr;
}
void do_interrupt (CPUState *env)
{
env->exception_index = -1;
}
#else
target_phys_addr_t cpu_get_phys_page_debug (CPUState *env, target_ulong addr)
{
return -1;
}
int cpu_alpha_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
int mmu_idx, int is_softmmu)
{
uint32_t opc;
if (rw == 2) {
/* Instruction translation buffer miss */
env->exception_index = EXCP_ITB_MISS;
} else {
if (env->ipr[IPR_EXC_ADDR] & 1)
env->exception_index = EXCP_DTB_MISS_PAL;
else
env->exception_index = EXCP_DTB_MISS_NATIVE;
opc = (ldl_code(env->pc) >> 21) << 4;
if (rw) {
opc |= 0x9;
} else {
opc |= 0x4;
}
env->ipr[IPR_MM_STAT] = opc;
}
return 1;
}
int cpu_alpha_mfpr (CPUState *env, int iprn, uint64_t *valp)
{
uint64_t hwpcb;
int ret = 0;
hwpcb = env->ipr[IPR_PCBB];
switch (iprn) {
case IPR_ASN:
if (env->features & FEATURE_ASN)
*valp = env->ipr[IPR_ASN];
else
*valp = 0;
break;
case IPR_ASTEN:
*valp = ((int64_t)(env->ipr[IPR_ASTEN] << 60)) >> 60;
break;
case IPR_ASTSR:
*valp = ((int64_t)(env->ipr[IPR_ASTSR] << 60)) >> 60;
break;
case IPR_DATFX:
/* Write only */
ret = -1;
break;
case IPR_ESP:
if (env->features & FEATURE_SPS)
*valp = env->ipr[IPR_ESP];
else
*valp = ldq_raw(hwpcb + 8);
break;
case IPR_FEN:
*valp = ((int64_t)(env->ipr[IPR_FEN] << 63)) >> 63;
break;
case IPR_IPIR:
/* Write-only */
ret = -1;
break;
case IPR_IPL:
*valp = ((int64_t)(env->ipr[IPR_IPL] << 59)) >> 59;
break;
case IPR_KSP:
if (!(env->ipr[IPR_EXC_ADDR] & 1)) {
ret = -1;
} else {
if (env->features & FEATURE_SPS)
*valp = env->ipr[IPR_KSP];
else
*valp = ldq_raw(hwpcb + 0);
}
break;
case IPR_MCES:
*valp = ((int64_t)(env->ipr[IPR_MCES] << 59)) >> 59;
break;
case IPR_PERFMON:
/* Implementation specific */
*valp = 0;
break;
case IPR_PCBB:
*valp = ((int64_t)env->ipr[IPR_PCBB] << 16) >> 16;
break;
case IPR_PRBR:
*valp = env->ipr[IPR_PRBR];
break;
case IPR_PTBR:
*valp = env->ipr[IPR_PTBR];
break;
case IPR_SCBB:
*valp = (int64_t)((int32_t)env->ipr[IPR_SCBB]);
break;
case IPR_SIRR:
/* Write-only */
ret = -1;
break;
case IPR_SISR:
*valp = (int64_t)((int16_t)env->ipr[IPR_SISR]);
case IPR_SSP:
if (env->features & FEATURE_SPS)
*valp = env->ipr[IPR_SSP];
else
*valp = ldq_raw(hwpcb + 16);
break;
case IPR_SYSPTBR:
if (env->features & FEATURE_VIRBND)
*valp = env->ipr[IPR_SYSPTBR];
else
ret = -1;
break;
case IPR_TBCHK:
if ((env->features & FEATURE_TBCHK)) {
/* XXX: TODO */
*valp = 0;
ret = -1;
} else {
ret = -1;
}
break;
case IPR_TBIA:
/* Write-only */
ret = -1;
break;
case IPR_TBIAP:
/* Write-only */
ret = -1;
break;
case IPR_TBIS:
/* Write-only */
ret = -1;
break;
case IPR_TBISD:
/* Write-only */
ret = -1;
break;
case IPR_TBISI:
/* Write-only */
ret = -1;
break;
case IPR_USP:
if (env->features & FEATURE_SPS)
*valp = env->ipr[IPR_USP];
else
*valp = ldq_raw(hwpcb + 24);
break;
case IPR_VIRBND:
if (env->features & FEATURE_VIRBND)
*valp = env->ipr[IPR_VIRBND];
else
ret = -1;
break;
case IPR_VPTB:
*valp = env->ipr[IPR_VPTB];
break;
case IPR_WHAMI:
*valp = env->ipr[IPR_WHAMI];
break;
default:
/* Invalid */
ret = -1;
break;
}
return ret;
}
int cpu_alpha_mtpr (CPUState *env, int iprn, uint64_t val, uint64_t *oldvalp)
{
uint64_t hwpcb, tmp64;
uint8_t tmp8;
int ret = 0;
hwpcb = env->ipr[IPR_PCBB];
switch (iprn) {
case IPR_ASN:
/* Read-only */
ret = -1;
break;
case IPR_ASTEN:
tmp8 = ((int8_t)(env->ipr[IPR_ASTEN] << 4)) >> 4;
*oldvalp = tmp8;
tmp8 &= val & 0xF;
tmp8 |= (val >> 4) & 0xF;
env->ipr[IPR_ASTEN] &= ~0xF;
env->ipr[IPR_ASTEN] |= tmp8;
ret = 1;
break;
case IPR_ASTSR:
tmp8 = ((int8_t)(env->ipr[IPR_ASTSR] << 4)) >> 4;
*oldvalp = tmp8;
tmp8 &= val & 0xF;
tmp8 |= (val >> 4) & 0xF;
env->ipr[IPR_ASTSR] &= ~0xF;
env->ipr[IPR_ASTSR] |= tmp8;
ret = 1;
case IPR_DATFX:
env->ipr[IPR_DATFX] &= ~0x1;
env->ipr[IPR_DATFX] |= val & 1;
tmp64 = ldq_raw(hwpcb + 56);
tmp64 &= ~0x8000000000000000ULL;
tmp64 |= (val & 1) << 63;
stq_raw(hwpcb + 56, tmp64);
break;
case IPR_ESP:
if (env->features & FEATURE_SPS)
env->ipr[IPR_ESP] = val;
else
stq_raw(hwpcb + 8, val);
break;
case IPR_FEN:
env->ipr[IPR_FEN] = val & 1;
tmp64 = ldq_raw(hwpcb + 56);
tmp64 &= ~1;
tmp64 |= val & 1;
stq_raw(hwpcb + 56, tmp64);
break;
case IPR_IPIR:
/* XXX: TODO: Send IRQ to CPU #ir[16] */
break;
case IPR_IPL:
*oldvalp = ((int64_t)(env->ipr[IPR_IPL] << 59)) >> 59;
env->ipr[IPR_IPL] &= ~0x1F;
env->ipr[IPR_IPL] |= val & 0x1F;
/* XXX: may issue an interrupt or ASR _now_ */
ret = 1;
break;
case IPR_KSP:
if (!(env->ipr[IPR_EXC_ADDR] & 1)) {
ret = -1;
} else {
if (env->features & FEATURE_SPS)
env->ipr[IPR_KSP] = val;
else
stq_raw(hwpcb + 0, val);
}
break;
case IPR_MCES:
env->ipr[IPR_MCES] &= ~((val & 0x7) | 0x18);
env->ipr[IPR_MCES] |= val & 0x18;
break;
case IPR_PERFMON:
/* Implementation specific */
*oldvalp = 0;
ret = 1;
break;
case IPR_PCBB:
/* Read-only */
ret = -1;
break;
case IPR_PRBR:
env->ipr[IPR_PRBR] = val;
break;
case IPR_PTBR:
/* Read-only */
ret = -1;
break;
case IPR_SCBB:
env->ipr[IPR_SCBB] = (uint32_t)val;
break;
case IPR_SIRR:
if (val & 0xF) {
env->ipr[IPR_SISR] |= 1 << (val & 0xF);
/* XXX: request a software interrupt _now_ */
}
break;
case IPR_SISR:
/* Read-only */
ret = -1;
break;
case IPR_SSP:
if (env->features & FEATURE_SPS)
env->ipr[IPR_SSP] = val;
else
stq_raw(hwpcb + 16, val);
break;
case IPR_SYSPTBR:
if (env->features & FEATURE_VIRBND)
env->ipr[IPR_SYSPTBR] = val;
else
ret = -1;
case IPR_TBCHK:
/* Read-only */
ret = -1;
break;
case IPR_TBIA:
tlb_flush(env, 1);
break;
case IPR_TBIAP:
tlb_flush(env, 1);
break;
case IPR_TBIS:
tlb_flush_page(env, val);
break;
case IPR_TBISD:
tlb_flush_page(env, val);
break;
case IPR_TBISI:
tlb_flush_page(env, val);
break;
case IPR_USP:
if (env->features & FEATURE_SPS)
env->ipr[IPR_USP] = val;
else
stq_raw(hwpcb + 24, val);
break;
case IPR_VIRBND:
if (env->features & FEATURE_VIRBND)
env->ipr[IPR_VIRBND] = val;
else
ret = -1;
break;
case IPR_VPTB:
env->ipr[IPR_VPTB] = val;
break;
case IPR_WHAMI:
/* Read-only */
ret = -1;
break;
default:
/* Invalid */
ret = -1;
break;
}
return ret;
}
void do_interrupt (CPUState *env)
{
int excp;
env->ipr[IPR_EXC_ADDR] = env->pc | 1;
excp = env->exception_index;
env->exception_index = 0;
env->error_code = 0;
/* XXX: disable interrupts and memory mapping */
if (env->ipr[IPR_PAL_BASE] != -1ULL) {
/* We use native PALcode */
env->pc = env->ipr[IPR_PAL_BASE] + excp;
} else {
/* We use emulated PALcode */
call_pal(env);
/* Emulate REI */
env->pc = env->ipr[IPR_EXC_ADDR] & ~7;
env->ipr[IPR_EXC_ADDR] = env->ipr[IPR_EXC_ADDR] & 1;
/* XXX: re-enable interrupts and memory mapping */
}
}
#endif
void cpu_dump_state (CPUState *env, FILE *f,
int (*cpu_fprintf)(FILE *f, const char *fmt, ...),
int flags)
{
static unsigned char *linux_reg_names[] = {
"v0 ", "t0 ", "t1 ", "t2 ", "t3 ", "t4 ", "t5 ", "t6 ",
"t7 ", "s0 ", "s1 ", "s2 ", "s3 ", "s4 ", "s5 ", "fp ",
"a0 ", "a1 ", "a2 ", "a3 ", "a4 ", "a5 ", "t8 ", "t9 ",
"t10", "t11", "ra ", "t12", "at ", "gp ", "sp ", "zero",
};
int i;
cpu_fprintf(f, " PC " TARGET_FMT_lx " PS " TARGET_FMT_lx "\n",
env->pc, env->ps);
for (i = 0; i < 31; i++) {
cpu_fprintf(f, "IR%02d %s " TARGET_FMT_lx " ", i,
linux_reg_names[i], env->ir[i]);
if ((i % 3) == 2)
cpu_fprintf(f, "\n");
}
cpu_fprintf(f, "\n");
for (i = 0; i < 31; i++) {
cpu_fprintf(f, "FIR%02d " TARGET_FMT_lx " ", i,
*((uint64_t *)(&env->fir[i])));
if ((i % 3) == 2)
cpu_fprintf(f, "\n");
}
cpu_fprintf(f, "FT " TARGET_FMT_lx " " TARGET_FMT_lx " " TARGET_FMT_lx,
*((uint64_t *)(&env->ft0)), *((uint64_t *)(&env->ft1)),
*((uint64_t *)(&env->ft2)));
cpu_fprintf(f, "\nMEM " TARGET_FMT_lx " %d %d\n",
ldq_raw(0x000000004007df60ULL),
(uint8_t *)(&env->ft0), (uint8_t *)(&env->fir[0]));
}
void cpu_dump_EA (target_ulong EA)
{
FILE *f;
if (logfile)
f = logfile;
else
f = stdout;
fprintf(f, "Memory access at address " TARGET_FMT_lx "\n", EA);
}
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