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qemu-patch-raspberry4/target/openrisc/sys_helper.c
Richard Henderson fffde6695f target/openrisc: Fix tlb flushing in mtspr 
The previous code was confused, avoiding the flush of the old entry
if the new entry is invalid.  We need to flush the old page if the
old entry is valid and the new page if the new entry is valid.

This bug was masked by over-flushing elsewhere.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Stafford Horne <shorne@gmail.com>
2018-07-03 00:05:28 +09:00

317 lines
9.5 KiB
C
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/*
* 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 "qemu/osdep.h"
#include "cpu.h"
#include "exec/exec-all.h"
#include "exec/helper-proto.h"
#include "exception.h"
#include "sysemu/sysemu.h"
#define TO_SPR(group, number) (((group) << 11) + (number))
void HELPER(mtspr)(CPUOpenRISCState *env, target_ulong spr, target_ulong rb)
{
#ifndef CONFIG_USER_ONLY
OpenRISCCPU *cpu = openrisc_env_get_cpu(env);
CPUState *cs = CPU(cpu);
target_ulong mr;
int idx;
switch (spr) {
case TO_SPR(0, 0): /* VR */
env->vr = rb;
break;
case TO_SPR(0, 11): /* EVBAR */
env->evbar = rb;
break;
case TO_SPR(0, 16): /* NPC */
cpu_restore_state(cs, GETPC(), true);
/* ??? Mirror or1ksim in not trashing delayed branch state
when "jumping" to the current instruction. */
if (env->pc != rb) {
env->pc = rb;
env->dflag = 0;
cpu_loop_exit(cs);
}
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(cs);
}
cpu_set_sr(env, rb);
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(0, 1024) ... TO_SPR(0, 1024 + (16 * 32)): /* Shadow GPRs */
idx = (spr - 1024);
env->shadow_gpr[idx / 32][idx % 32] = rb;
break;
case TO_SPR(1, 512) ... TO_SPR(1, 512+DTLB_SIZE-1): /* DTLBW0MR 0-127 */
idx = spr - TO_SPR(1, 512);
mr = env->tlb.dtlb[idx].mr;
if (mr & 1) {
tlb_flush_page(cs, mr & TARGET_PAGE_MASK);
}
if (rb & 1) {
tlb_flush_page(cs, rb & TARGET_PAGE_MASK);
}
env->tlb.dtlb[idx].mr = rb;
break;
case TO_SPR(1, 640) ... TO_SPR(1, 640+DTLB_SIZE-1): /* DTLBW0TR 0-127 */
idx = spr - TO_SPR(1, 640);
env->tlb.dtlb[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, 512+ITLB_SIZE-1): /* ITLBW0MR 0-127 */
idx = spr - TO_SPR(2, 512);
mr = env->tlb.itlb[idx].mr;
if (mr & 1) {
tlb_flush_page(cs, mr & TARGET_PAGE_MASK);
}
if (rb & 1) {
tlb_flush_page(cs, rb & TARGET_PAGE_MASK);
}
env->tlb.itlb[idx].mr = rb;
break;
case TO_SPR(2, 640) ... TO_SPR(2, 640+ITLB_SIZE-1): /* ITLBW0TR 0-127 */
idx = spr - TO_SPR(2, 640);
env->tlb.itlb[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(5, 1): /* MACLO */
env->mac = deposit64(env->mac, 0, 32, rb);
break;
case TO_SPR(5, 2): /* MACHI */
env->mac = deposit64(env->mac, 32, 32, rb);
break;
case TO_SPR(8, 0): /* PMR */
env->pmr = rb;
if (env->pmr & PMR_DME || env->pmr & PMR_SME) {
cpu_restore_state(cs, GETPC(), true);
env->pc += 4;
cs->halted = 1;
raise_exception(cpu, EXCP_HALTED);
}
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 */
{
if ((env->ttmr & TTMR_M) ^ (rb & TTMR_M)) {
switch (rb & TTMR_M) {
case TIMER_NONE:
cpu_openrisc_count_stop(cpu);
break;
case TIMER_INTR:
case TIMER_SHOT:
case TIMER_CONT:
cpu_openrisc_count_start(cpu);
break;
default:
break;
}
}
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;
cs->interrupt_request &= ~CPU_INTERRUPT_TIMER;
}
cpu_openrisc_timer_update(cpu);
}
break;
case TO_SPR(10, 1): /* TTCR */
cpu_openrisc_count_set(cpu, rb);
if (env->ttmr & TIMER_NONE) {
return;
}
cpu_openrisc_timer_update(cpu);
break;
default:
break;
}
#endif
}
target_ulong HELPER(mfspr)(CPUOpenRISCState *env, target_ulong rd,
target_ulong spr)
{
#ifndef CONFIG_USER_ONLY
OpenRISCCPU *cpu = openrisc_env_get_cpu(env);
CPUState *cs = CPU(cpu);
int idx;
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, 11): /* EVBAR */
return env->evbar;
case TO_SPR(0, 16): /* NPC (equals PC) */
cpu_restore_state(cs, GETPC(), false);
return env->pc;
case TO_SPR(0, 17): /* SR */
return cpu_get_sr(env);
case TO_SPR(0, 18): /* PPC */
cpu_restore_state(cs, GETPC(), false);
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(0, 128): /* COREID */
return cpu->parent_obj.cpu_index;
case TO_SPR(0, 129): /* NUMCORES */
return max_cpus;
case TO_SPR(0, 1024) ... TO_SPR(0, 1024 + (16 * 32)): /* Shadow GPRs */
idx = (spr - 1024);
return env->shadow_gpr[idx / 32][idx % 32];
case TO_SPR(1, 512) ... TO_SPR(1, 512+DTLB_SIZE-1): /* DTLBW0MR 0-127 */
idx = spr - TO_SPR(1, 512);
return env->tlb.dtlb[idx].mr;
case TO_SPR(1, 640) ... TO_SPR(1, 640+DTLB_SIZE-1): /* DTLBW0TR 0-127 */
idx = spr - TO_SPR(1, 640);
return env->tlb.dtlb[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, 512+ITLB_SIZE-1): /* ITLBW0MR 0-127 */
idx = spr - TO_SPR(2, 512);
return env->tlb.itlb[idx].mr;
case TO_SPR(2, 640) ... TO_SPR(2, 640+ITLB_SIZE-1): /* ITLBW0TR 0-127 */
idx = spr - TO_SPR(2, 640);
return env->tlb.itlb[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(5, 1): /* MACLO */
return (uint32_t)env->mac;
break;
case TO_SPR(5, 2): /* MACHI */
return env->mac >> 32;
break;
case TO_SPR(8, 0): /* PMR */
return env->pmr;
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 cpu_openrisc_count_get(cpu);
default:
break;
}
#endif
/* for rd is passed in, if rd unchanged, just keep it back. */
return rd;
}
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