08f021de3a
As per OpenRISC spec 1.4 FPCSR can be read and written in user mode. Update mtspr and mfspr helpers to support this by moving the is_user check into the helper. Link: https://raw.githubusercontent.com/openrisc/doc/master/openrisc-arch-1.4-rev0.pdf Signed-off-by: Stafford Horne <shorne@gmail.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
359 lines
11 KiB
C
359 lines
11 KiB
C
/*
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* OpenRISC system instructions helper routines
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*
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* Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
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* Zhizhou Zhang <etouzh@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "cpu.h"
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#include "exec/exec-all.h"
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#include "exec/helper-proto.h"
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#include "exception.h"
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#ifndef CONFIG_USER_ONLY
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#include "hw/boards.h"
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#endif
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#define TO_SPR(group, number) (((group) << 11) + (number))
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static inline bool is_user(CPUOpenRISCState *env)
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{
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#ifdef CONFIG_USER_ONLY
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return true;
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#else
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return (env->sr & SR_SM) == 0;
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#endif
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}
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void HELPER(mtspr)(CPUOpenRISCState *env, target_ulong spr, target_ulong rb)
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{
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OpenRISCCPU *cpu = env_archcpu(env);
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#ifndef CONFIG_USER_ONLY
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CPUState *cs = env_cpu(env);
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target_ulong mr;
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int idx;
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#endif
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/* Handle user accessible SPRs first. */
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switch (spr) {
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case TO_SPR(0, 20): /* FPCSR */
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cpu_set_fpcsr(env, rb);
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return;
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}
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if (is_user(env)) {
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raise_exception(cpu, EXCP_ILLEGAL);
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}
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#ifndef CONFIG_USER_ONLY
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switch (spr) {
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case TO_SPR(0, 11): /* EVBAR */
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env->evbar = rb;
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break;
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case TO_SPR(0, 16): /* NPC */
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cpu_restore_state(cs, GETPC());
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/* ??? Mirror or1ksim in not trashing delayed branch state
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when "jumping" to the current instruction. */
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if (env->pc != rb) {
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env->pc = rb;
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env->dflag = 0;
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}
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cpu_loop_exit(cs);
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break;
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case TO_SPR(0, 17): /* SR */
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cpu_set_sr(env, rb);
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break;
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case TO_SPR(0, 32): /* EPCR */
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env->epcr = rb;
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break;
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case TO_SPR(0, 48): /* EEAR */
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env->eear = rb;
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break;
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case TO_SPR(0, 64): /* ESR */
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env->esr = rb;
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break;
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case TO_SPR(0, 1024) ... TO_SPR(0, 1024 + (16 * 32)): /* Shadow GPRs */
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idx = (spr - 1024);
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env->shadow_gpr[idx / 32][idx % 32] = rb;
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break;
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case TO_SPR(1, 512) ... TO_SPR(1, 512 + TLB_SIZE - 1): /* DTLBW0MR 0-127 */
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idx = spr - TO_SPR(1, 512);
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mr = env->tlb.dtlb[idx].mr;
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if (mr & 1) {
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tlb_flush_page(cs, mr & TARGET_PAGE_MASK);
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}
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if (rb & 1) {
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tlb_flush_page(cs, rb & TARGET_PAGE_MASK);
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}
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env->tlb.dtlb[idx].mr = rb;
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break;
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case TO_SPR(1, 640) ... TO_SPR(1, 640 + TLB_SIZE - 1): /* DTLBW0TR 0-127 */
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idx = spr - TO_SPR(1, 640);
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env->tlb.dtlb[idx].tr = rb;
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break;
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case TO_SPR(1, 768) ... TO_SPR(1, 895): /* DTLBW1MR 0-127 */
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case TO_SPR(1, 896) ... TO_SPR(1, 1023): /* DTLBW1TR 0-127 */
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case TO_SPR(1, 1024) ... TO_SPR(1, 1151): /* DTLBW2MR 0-127 */
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case TO_SPR(1, 1152) ... TO_SPR(1, 1279): /* DTLBW2TR 0-127 */
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case TO_SPR(1, 1280) ... TO_SPR(1, 1407): /* DTLBW3MR 0-127 */
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case TO_SPR(1, 1408) ... TO_SPR(1, 1535): /* DTLBW3TR 0-127 */
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break;
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case TO_SPR(2, 512) ... TO_SPR(2, 512 + TLB_SIZE - 1): /* ITLBW0MR 0-127 */
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idx = spr - TO_SPR(2, 512);
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mr = env->tlb.itlb[idx].mr;
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if (mr & 1) {
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tlb_flush_page(cs, mr & TARGET_PAGE_MASK);
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}
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if (rb & 1) {
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tlb_flush_page(cs, rb & TARGET_PAGE_MASK);
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}
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env->tlb.itlb[idx].mr = rb;
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break;
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case TO_SPR(2, 640) ... TO_SPR(2, 640 + TLB_SIZE - 1): /* ITLBW0TR 0-127 */
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idx = spr - TO_SPR(2, 640);
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env->tlb.itlb[idx].tr = rb;
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break;
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case TO_SPR(2, 768) ... TO_SPR(2, 895): /* ITLBW1MR 0-127 */
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case TO_SPR(2, 896) ... TO_SPR(2, 1023): /* ITLBW1TR 0-127 */
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case TO_SPR(2, 1024) ... TO_SPR(2, 1151): /* ITLBW2MR 0-127 */
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case TO_SPR(2, 1152) ... TO_SPR(2, 1279): /* ITLBW2TR 0-127 */
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case TO_SPR(2, 1280) ... TO_SPR(2, 1407): /* ITLBW3MR 0-127 */
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case TO_SPR(2, 1408) ... TO_SPR(2, 1535): /* ITLBW3TR 0-127 */
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break;
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case TO_SPR(5, 1): /* MACLO */
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env->mac = deposit64(env->mac, 0, 32, rb);
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break;
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case TO_SPR(5, 2): /* MACHI */
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env->mac = deposit64(env->mac, 32, 32, rb);
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break;
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case TO_SPR(8, 0): /* PMR */
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env->pmr = rb;
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if (env->pmr & PMR_DME || env->pmr & PMR_SME) {
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cpu_restore_state(cs, GETPC());
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env->pc += 4;
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cs->halted = 1;
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raise_exception(cpu, EXCP_HALTED);
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}
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break;
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case TO_SPR(9, 0): /* PICMR */
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env->picmr = rb;
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qemu_mutex_lock_iothread();
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if (env->picsr & env->picmr) {
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cpu_interrupt(cs, CPU_INTERRUPT_HARD);
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} else {
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cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
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}
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qemu_mutex_unlock_iothread();
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break;
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case TO_SPR(9, 2): /* PICSR */
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env->picsr &= ~rb;
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break;
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case TO_SPR(10, 0): /* TTMR */
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{
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qemu_mutex_lock_iothread();
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if ((env->ttmr & TTMR_M) ^ (rb & TTMR_M)) {
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switch (rb & TTMR_M) {
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case TIMER_NONE:
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cpu_openrisc_count_stop(cpu);
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break;
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case TIMER_INTR:
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case TIMER_SHOT:
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case TIMER_CONT:
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cpu_openrisc_count_start(cpu);
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break;
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default:
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break;
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}
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}
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int ip = env->ttmr & TTMR_IP;
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if (rb & TTMR_IP) { /* Keep IP bit. */
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env->ttmr = (rb & ~TTMR_IP) | ip;
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} else { /* Clear IP bit. */
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env->ttmr = rb & ~TTMR_IP;
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cs->interrupt_request &= ~CPU_INTERRUPT_TIMER;
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}
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cpu_openrisc_timer_update(cpu);
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qemu_mutex_unlock_iothread();
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}
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break;
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case TO_SPR(10, 1): /* TTCR */
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qemu_mutex_lock_iothread();
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cpu_openrisc_count_set(cpu, rb);
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cpu_openrisc_timer_update(cpu);
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qemu_mutex_unlock_iothread();
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break;
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}
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#endif
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}
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target_ulong HELPER(mfspr)(CPUOpenRISCState *env, target_ulong rd,
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target_ulong spr)
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{
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OpenRISCCPU *cpu = env_archcpu(env);
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#ifndef CONFIG_USER_ONLY
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uint64_t data[TARGET_INSN_START_WORDS];
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MachineState *ms = MACHINE(qdev_get_machine());
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CPUState *cs = env_cpu(env);
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int idx;
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#endif
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/* Handle user accessible SPRs first. */
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switch (spr) {
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case TO_SPR(0, 20): /* FPCSR */
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return env->fpcsr;
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}
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if (is_user(env)) {
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raise_exception(cpu, EXCP_ILLEGAL);
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}
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#ifndef CONFIG_USER_ONLY
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switch (spr) {
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case TO_SPR(0, 0): /* VR */
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return env->vr;
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case TO_SPR(0, 1): /* UPR */
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return env->upr;
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case TO_SPR(0, 2): /* CPUCFGR */
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return env->cpucfgr;
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case TO_SPR(0, 3): /* DMMUCFGR */
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return env->dmmucfgr;
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case TO_SPR(0, 4): /* IMMUCFGR */
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return env->immucfgr;
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case TO_SPR(0, 9): /* VR2 */
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return env->vr2;
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case TO_SPR(0, 10): /* AVR */
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return env->avr;
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case TO_SPR(0, 11): /* EVBAR */
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return env->evbar;
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case TO_SPR(0, 16): /* NPC (equals PC) */
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if (cpu_unwind_state_data(cs, GETPC(), data)) {
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return data[0];
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}
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return env->pc;
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case TO_SPR(0, 17): /* SR */
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return cpu_get_sr(env);
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case TO_SPR(0, 18): /* PPC */
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if (cpu_unwind_state_data(cs, GETPC(), data)) {
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if (data[1] & 2) {
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return data[0] - 4;
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}
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}
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return env->ppc;
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case TO_SPR(0, 32): /* EPCR */
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return env->epcr;
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case TO_SPR(0, 48): /* EEAR */
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return env->eear;
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case TO_SPR(0, 64): /* ESR */
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return env->esr;
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case TO_SPR(0, 128): /* COREID */
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return cpu->parent_obj.cpu_index;
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case TO_SPR(0, 129): /* NUMCORES */
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return ms->smp.max_cpus;
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case TO_SPR(0, 1024) ... TO_SPR(0, 1024 + (16 * 32)): /* Shadow GPRs */
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idx = (spr - 1024);
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return env->shadow_gpr[idx / 32][idx % 32];
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case TO_SPR(1, 512) ... TO_SPR(1, 512 + TLB_SIZE - 1): /* DTLBW0MR 0-127 */
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idx = spr - TO_SPR(1, 512);
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return env->tlb.dtlb[idx].mr;
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case TO_SPR(1, 640) ... TO_SPR(1, 640 + TLB_SIZE - 1): /* DTLBW0TR 0-127 */
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idx = spr - TO_SPR(1, 640);
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return env->tlb.dtlb[idx].tr;
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case TO_SPR(1, 768) ... TO_SPR(1, 895): /* DTLBW1MR 0-127 */
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case TO_SPR(1, 896) ... TO_SPR(1, 1023): /* DTLBW1TR 0-127 */
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case TO_SPR(1, 1024) ... TO_SPR(1, 1151): /* DTLBW2MR 0-127 */
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case TO_SPR(1, 1152) ... TO_SPR(1, 1279): /* DTLBW2TR 0-127 */
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case TO_SPR(1, 1280) ... TO_SPR(1, 1407): /* DTLBW3MR 0-127 */
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case TO_SPR(1, 1408) ... TO_SPR(1, 1535): /* DTLBW3TR 0-127 */
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break;
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case TO_SPR(2, 512) ... TO_SPR(2, 512 + TLB_SIZE - 1): /* ITLBW0MR 0-127 */
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idx = spr - TO_SPR(2, 512);
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return env->tlb.itlb[idx].mr;
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case TO_SPR(2, 640) ... TO_SPR(2, 640 + TLB_SIZE - 1): /* ITLBW0TR 0-127 */
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idx = spr - TO_SPR(2, 640);
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return env->tlb.itlb[idx].tr;
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case TO_SPR(2, 768) ... TO_SPR(2, 895): /* ITLBW1MR 0-127 */
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case TO_SPR(2, 896) ... TO_SPR(2, 1023): /* ITLBW1TR 0-127 */
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case TO_SPR(2, 1024) ... TO_SPR(2, 1151): /* ITLBW2MR 0-127 */
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case TO_SPR(2, 1152) ... TO_SPR(2, 1279): /* ITLBW2TR 0-127 */
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case TO_SPR(2, 1280) ... TO_SPR(2, 1407): /* ITLBW3MR 0-127 */
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case TO_SPR(2, 1408) ... TO_SPR(2, 1535): /* ITLBW3TR 0-127 */
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break;
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case TO_SPR(5, 1): /* MACLO */
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return (uint32_t)env->mac;
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break;
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case TO_SPR(5, 2): /* MACHI */
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return env->mac >> 32;
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break;
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case TO_SPR(8, 0): /* PMR */
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return env->pmr;
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case TO_SPR(9, 0): /* PICMR */
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return env->picmr;
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case TO_SPR(9, 2): /* PICSR */
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return env->picsr;
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case TO_SPR(10, 0): /* TTMR */
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return env->ttmr;
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case TO_SPR(10, 1): /* TTCR */
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qemu_mutex_lock_iothread();
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cpu_openrisc_count_update(cpu);
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qemu_mutex_unlock_iothread();
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return cpu_openrisc_count_get(cpu);
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}
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#endif
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/* for rd is passed in, if rd unchanged, just keep it back. */
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return rd;
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}
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