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target-or32: Add system instructions

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Add OpenRISC system instructions.

Signed-off-by: Jia Liu <proljc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Jia Liu 2012-07-20 15:50:49 +08:00 committed by Blue Swirl
parent ce6e1e9ec9
commit 4dd044c6ba
5 changed files with 321 additions and 1 deletions
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2
target-openrisc/Makefile.objs
View File

@ -1,4 +1,4 @@
obj-$(CONFIG_SOFTMMU) += machine.o
obj-y += cpu.o exception.o interrupt.o mmu.o translate.o
obj-y += exception_helper.o fpu_helper.o int_helper.o \
interrupt_helper.o mmu_helper.o
interrupt_helper.o mmu_helper.o sys_helper.o

3
target-openrisc/cpu.h
View File

@ -80,6 +80,9 @@ enum {
(reg) |= ((v & 0x1f) << 2);\
} while (0)
/* Version Register */
#define SPR_VR 0xFFFF003F
/* Internal flags, delay slot flag */
#define D_FLAG 1

4
target-openrisc/helper.h
View File

@ -63,4 +63,8 @@ DEF_HELPER_FLAGS_3(mul32, 0, i32, env, i32, i32)
/* interrupt */
DEF_HELPER_FLAGS_1(rfe, 0, void, env)
/* sys */
DEF_HELPER_FLAGS_4(mtspr, 0, void, env, tl, tl, tl)
DEF_HELPER_FLAGS_4(mfspr, 0, tl, env, tl, tl, tl)
#include "def-helper.h"

287
target-openrisc/sys_helper.c Normal file
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@ -0,0 +1,287 @@
/*
* OpenRISC system instructions helper routines
*
* Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
* Zhizhou Zhang <etouzh@gmail.com>
*
* 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"
#define TO_SPR(group, number) (((group) << 11) + (number))
void HELPER(mtspr)(CPUOpenRISCState *env,
target_ulong ra, target_ulong rb, target_ulong offset)
{
#ifndef CONFIG_USER_ONLY
int spr = (ra | offset);
int idx;
OpenRISCCPU *cpu = OPENRISC_CPU(ENV_GET_CPU(env));
switch (spr) {
case TO_SPR(0, 0): /* VR */
env->vr = rb;
break;
case TO_SPR(0, 16): /* NPC */
env->npc = rb;
break;
case TO_SPR(0, 17): /* SR */
if ((env->sr & (SR_IME | SR_DME | SR_SM)) ^
(rb & (SR_IME | SR_DME | SR_SM))) {
tlb_flush(env, 1);
}
env->sr = rb;
env->sr |= SR_FO; /* FO is const equal to 1 */
if (env->sr & SR_DME) {
env->tlb->cpu_openrisc_map_address_data =
&cpu_openrisc_get_phys_data;
} else {
env->tlb->cpu_openrisc_map_address_data =
&cpu_openrisc_get_phys_nommu;
}
if (env->sr & SR_IME) {
env->tlb->cpu_openrisc_map_address_code =
&cpu_openrisc_get_phys_code;
} else {
env->tlb->cpu_openrisc_map_address_code =
&cpu_openrisc_get_phys_nommu;
}
break;
case TO_SPR(0, 18): /* PPC */
env->ppc = rb;
break;
case TO_SPR(0, 32): /* EPCR */
env->epcr = rb;
break;
case TO_SPR(0, 48): /* EEAR */
env->eear = rb;
break;
case TO_SPR(0, 64): /* ESR */
env->esr = rb;
break;
case TO_SPR(1, 512) ... TO_SPR(1, 639): /* DTLBW0MR 0-127 */
idx = spr - TO_SPR(1, 512);
if (!(rb & 1)) {
tlb_flush_page(env, env->tlb->dtlb[0][idx].mr & TARGET_PAGE_MASK);
}
env->tlb->dtlb[0][idx].mr = rb;
break;
case TO_SPR(1, 640) ... TO_SPR(1, 767): /* DTLBW0TR 0-127 */
idx = spr - TO_SPR(1, 640);
env->tlb->dtlb[0][idx].tr = rb;
break;
case TO_SPR(1, 768) ... TO_SPR(1, 895): /* DTLBW1MR 0-127 */
case TO_SPR(1, 896) ... TO_SPR(1, 1023): /* DTLBW1TR 0-127 */
case TO_SPR(1, 1024) ... TO_SPR(1, 1151): /* DTLBW2MR 0-127 */
case TO_SPR(1, 1152) ... TO_SPR(1, 1279): /* DTLBW2TR 0-127 */
case TO_SPR(1, 1280) ... TO_SPR(1, 1407): /* DTLBW3MR 0-127 */
case TO_SPR(1, 1408) ... TO_SPR(1, 1535): /* DTLBW3TR 0-127 */
break;
case TO_SPR(2, 512) ... TO_SPR(2, 639): /* ITLBW0MR 0-127 */
idx = spr - TO_SPR(2, 512);
if (!(rb & 1)) {
tlb_flush_page(env, env->tlb->itlb[0][idx].mr & TARGET_PAGE_MASK);
}
env->tlb->itlb[0][idx].mr = rb;
break;
case TO_SPR(2, 640) ... TO_SPR(2, 767): /* ITLBW0TR 0-127 */
idx = spr - TO_SPR(2, 640);
env->tlb->itlb[0][idx].tr = rb;
break;
case TO_SPR(2, 768) ... TO_SPR(2, 895): /* ITLBW1MR 0-127 */
case TO_SPR(2, 896) ... TO_SPR(2, 1023): /* ITLBW1TR 0-127 */
case TO_SPR(2, 1024) ... TO_SPR(2, 1151): /* ITLBW2MR 0-127 */
case TO_SPR(2, 1152) ... TO_SPR(2, 1279): /* ITLBW2TR 0-127 */
case TO_SPR(2, 1280) ... TO_SPR(2, 1407): /* ITLBW3MR 0-127 */
case TO_SPR(2, 1408) ... TO_SPR(2, 1535): /* ITLBW3TR 0-127 */
break;
case TO_SPR(9, 0): /* PICMR */
env->picmr |= rb;
break;
case TO_SPR(9, 2): /* PICSR */
env->picsr &= ~rb;
break;
case TO_SPR(10, 0): /* TTMR */
{
int ip = env->ttmr & TTMR_IP;
if (rb & TTMR_IP) { /* Keep IP bit. */
env->ttmr = (rb & ~TTMR_IP) + ip;
} else { /* Clear IP bit. */
env->ttmr = rb & ~TTMR_IP;
env->interrupt_request &= ~CPU_INTERRUPT_TIMER;
}
cpu_openrisc_count_update(cpu);
switch (env->ttmr & TTMR_M) {
case TIMER_NONE:
cpu_openrisc_count_stop(cpu);
break;
case TIMER_INTR:
cpu_openrisc_count_start(cpu);
break;
case TIMER_SHOT:
cpu_openrisc_count_start(cpu);
break;
case TIMER_CONT:
cpu_openrisc_count_start(cpu);
break;
default:
break;
}
}
break;
case TO_SPR(10, 1): /* TTCR */
env->ttcr = rb;
if (env->ttmr & TIMER_NONE) {
return;
}
cpu_openrisc_count_start(cpu);
break;
default:
break;
}
#endif
}
target_ulong HELPER(mfspr)(CPUOpenRISCState *env,
target_ulong rd, target_ulong ra, uint32_t offset)
{
#ifndef CONFIG_USER_ONLY
int spr = (ra | offset);
int idx;
OpenRISCCPU *cpu = OPENRISC_CPU(ENV_GET_CPU(env));
switch (spr) {
case TO_SPR(0, 0): /* VR */
return env->vr & SPR_VR;
case TO_SPR(0, 1): /* UPR */
return env->upr; /* TT, DM, IM, UP present */
case TO_SPR(0, 2): /* CPUCFGR */
return env->cpucfgr;
case TO_SPR(0, 3): /* DMMUCFGR */
return env->dmmucfgr; /* 1Way, 64 entries */
case TO_SPR(0, 4): /* IMMUCFGR */
return env->immucfgr;
case TO_SPR(0, 16): /* NPC */
return env->npc;
case TO_SPR(0, 17): /* SR */
return env->sr;
case TO_SPR(0, 18): /* PPC */
return env->ppc;
case TO_SPR(0, 32): /* EPCR */
return env->epcr;
case TO_SPR(0, 48): /* EEAR */
return env->eear;
case TO_SPR(0, 64): /* ESR */
return env->esr;
case TO_SPR(1, 512) ... TO_SPR(1, 639): /* DTLBW0MR 0-127 */
idx = spr - TO_SPR(1, 512);
return env->tlb->dtlb[0][idx].mr;
case TO_SPR(1, 640) ... TO_SPR(1, 767): /* DTLBW0TR 0-127 */
idx = spr - TO_SPR(1, 640);
return env->tlb->dtlb[0][idx].tr;
case TO_SPR(1, 768) ... TO_SPR(1, 895): /* DTLBW1MR 0-127 */
case TO_SPR(1, 896) ... TO_SPR(1, 1023): /* DTLBW1TR 0-127 */
case TO_SPR(1, 1024) ... TO_SPR(1, 1151): /* DTLBW2MR 0-127 */
case TO_SPR(1, 1152) ... TO_SPR(1, 1279): /* DTLBW2TR 0-127 */
case TO_SPR(1, 1280) ... TO_SPR(1, 1407): /* DTLBW3MR 0-127 */
case TO_SPR(1, 1408) ... TO_SPR(1, 1535): /* DTLBW3TR 0-127 */
break;
case TO_SPR(2, 512) ... TO_SPR(2, 639): /* ITLBW0MR 0-127 */
idx = spr - TO_SPR(2, 512);
return env->tlb->itlb[0][idx].mr;
case TO_SPR(2, 640) ... TO_SPR(2, 767): /* ITLBW0TR 0-127 */
idx = spr - TO_SPR(2, 640);
return env->tlb->itlb[0][idx].tr;
case TO_SPR(2, 768) ... TO_SPR(2, 895): /* ITLBW1MR 0-127 */
case TO_SPR(2, 896) ... TO_SPR(2, 1023): /* ITLBW1TR 0-127 */
case TO_SPR(2, 1024) ... TO_SPR(2, 1151): /* ITLBW2MR 0-127 */
case TO_SPR(2, 1152) ... TO_SPR(2, 1279): /* ITLBW2TR 0-127 */
case TO_SPR(2, 1280) ... TO_SPR(2, 1407): /* ITLBW3MR 0-127 */
case TO_SPR(2, 1408) ... TO_SPR(2, 1535): /* ITLBW3TR 0-127 */
break;
case TO_SPR(9, 0): /* PICMR */
return env->picmr;
case TO_SPR(9, 2): /* PICSR */
return env->picsr;
case TO_SPR(10, 0): /* TTMR */
return env->ttmr;
case TO_SPR(10, 1): /* TTCR */
cpu_openrisc_count_update(cpu);
return env->ttcr;
default:
break;
}
#endif
/*If we later need to add tracepoints (or debug printfs) for the return
value, it may be useful to structure the code like this:
target_ulong ret = 0;
switch() {
case x:
ret = y;
break;
case z:
ret = 42;
break;
...
}
later something like trace_spr_read(ret);
return ret;*/
/* for rd is passed in, if rd unchanged, just keep it back. */
return rd;
}

26
target-openrisc/translate.c
View File

@ -997,10 +997,36 @@ static void dec_misc(DisasContext *dc, uint32_t insn)
case 0x2d: /* l.mfspr */
LOG_DIS("l.mfspr r%d, r%d, %d\n", rd, ra, I16);
{
#if defined(CONFIG_USER_ONLY)
return;
#else
TCGv_i32 ti = tcg_const_i32(I16);
if (dc->mem_idx == MMU_USER_IDX) {
gen_illegal_exception(dc);
return;
}
gen_helper_mfspr(cpu_R[rd], cpu_env, cpu_R[rd], cpu_R[ra], ti);
tcg_temp_free_i32(ti);
#endif
}
break;
case 0x30: /* l.mtspr */
LOG_DIS("l.mtspr %d, r%d, r%d, %d\n", I5, ra, rb, I11);
{
#if defined(CONFIG_USER_ONLY)
return;
#else
TCGv_i32 im = tcg_const_i32(tmp);
if (dc->mem_idx == MMU_USER_IDX) {
gen_illegal_exception(dc);
return;
}
gen_helper_mtspr(cpu_env, cpu_R[ra], cpu_R[rb], im);
tcg_temp_free_i32(im);
#endif
}
break;
/* not used yet, open it when we need or64. */