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f84734b874
These two instructions are aliases of MSR (immediate). Use the two helpers to properly implement svcr_write. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220620175235.60881-11-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
/*
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* ARM SME Operations
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*
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* Copyright (c) 2022 Linaro, Ltd.
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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 "internals.h"
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#include "exec/helper-proto.h"
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/* ResetSVEState */
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void arm_reset_sve_state(CPUARMState *env)
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{
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memset(env->vfp.zregs, 0, sizeof(env->vfp.zregs));
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/* Recall that FFR is stored as pregs[16]. */
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memset(env->vfp.pregs, 0, sizeof(env->vfp.pregs));
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vfp_set_fpcr(env, 0x0800009f);
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}
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void helper_set_pstate_sm(CPUARMState *env, uint32_t i)
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{
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if (i == FIELD_EX64(env->svcr, SVCR, SM)) {
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return;
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}
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env->svcr ^= R_SVCR_SM_MASK;
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arm_reset_sve_state(env);
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}
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void helper_set_pstate_za(CPUARMState *env, uint32_t i)
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{
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if (i == FIELD_EX64(env->svcr, SVCR, ZA)) {
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return;
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}
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env->svcr ^= R_SVCR_ZA_MASK;
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/*
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* ResetSMEState.
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*
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* SetPSTATE_ZA zeros on enable and disable. We can zero this only
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* on enable: while disabled, the storage is inaccessible and the
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* value does not matter. We're not saving the storage in vmstate
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* when disabled either.
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*/
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if (i) {
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memset(env->zarray, 0, sizeof(env->zarray));
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}
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}
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