From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35305) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YGG24-0006qo-BT for qemu-devel@nongnu.org; Tue, 27 Jan 2015 18:58:57 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YGG21-0005UI-1s for qemu-devel@nongnu.org; Tue, 27 Jan 2015 18:58:56 -0500 Received: from mail-pa0-f50.google.com ([209.85.220.50]:41986) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YGG20-0005U9-Q1 for qemu-devel@nongnu.org; Tue, 27 Jan 2015 18:58:52 -0500 Received: by mail-pa0-f50.google.com with SMTP id rd3so21618933pab.9 for ; Tue, 27 Jan 2015 15:58:51 -0800 (PST) From: Greg Bellows Date: Tue, 27 Jan 2015 17:58:36 -0600 Message-Id: <1422403117-16921-4-git-send-email-greg.bellows@linaro.org> In-Reply-To: <1422403117-16921-1-git-send-email-greg.bellows@linaro.org> References: <1422403117-16921-1-git-send-email-greg.bellows@linaro.org> Subject: [Qemu-devel] [PATCH v3 3/4] target-arm: Add 32/64-bit register sync List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, peter.maydell@linaro.org, christoffer.dall@linaro.org, alex.bennee@linaro.org Cc: Greg Bellows Add AArch32 to AArch64 register sychronization functions. Replace manual register synchronization with new functions in aarch64_cpu_do_interrupt() and HELPER(exception_return)(). Signed-off-by: Greg Bellows --- v2 -> v3 - Conditionalize interrupt handler update of aarch64. --- target-arm/helper-a64.c | 9 +++-- target-arm/internals.h | 89 +++++++++++++++++++++++++++++++++++++++++++++++++ target-arm/op_helper.c | 6 ++-- 3 files changed, 95 insertions(+), 9 deletions(-) diff --git a/target-arm/helper-a64.c b/target-arm/helper-a64.c index 81066ca..8c6a100 100644 --- a/target-arm/helper-a64.c +++ b/target-arm/helper-a64.c @@ -448,7 +448,6 @@ void aarch64_cpu_do_interrupt(CPUState *cs) unsigned int new_el = arm_excp_target_el(cs, cs->exception_index); target_ulong addr = env->cp15.vbar_el[new_el]; unsigned int new_mode = aarch64_pstate_mode(new_el, true); - int i; if (arm_current_el(env) < new_el) { if (env->aarch64) { @@ -512,15 +511,15 @@ void aarch64_cpu_do_interrupt(CPUState *cs) } env->elr_el[new_el] = env->regs[15]; - for (i = 0; i < 15; i++) { - env->xregs[i] = env->regs[i]; - } + aarch64_sync_32_to_64(env); env->condexec_bits = 0; } pstate_write(env, PSTATE_DAIF | new_mode); - env->aarch64 = 1; + if (arm_feature(env, ARM_FEATURE_AARCH64)) { + env->aarch64 = 1; + } aarch64_restore_sp(env, new_el); env->pc = addr; diff --git a/target-arm/internals.h b/target-arm/internals.h index bb171a7..626ea7d 100644 --- a/target-arm/internals.h +++ b/target-arm/internals.h @@ -128,6 +128,95 @@ static inline void aarch64_restore_sp(CPUARMState *env, int el) } } +static inline void aarch64_sync_32_to_64(CPUARMState *env) +{ + int i; + + /* We can blanket copy R[0:7] to X[0:7] */ + for (i = 0; i < 8; i++) { + env->xregs[i] = env->regs[i]; + } + + /* If we are in USR mode then we just want to complete the above blanket + * copy so we get the accurate register values. If not, then we have to go + * to the saved and banked user regs. + */ + if ((env->uncached_cpsr & 0x1f) == ARM_CPU_MODE_USR) { + for (i = 8; i < 15; i++) { + env->xregs[i] = env->regs[i]; + } + } else { + for (i = 8; i < 13; i++) { + env->xregs[i] = env->usr_regs[i-8]; + } + env->xregs[13] = env->banked_r13[bank_number(ARM_CPU_MODE_USR)]; + env->xregs[14] = env->banked_r14[bank_number(ARM_CPU_MODE_USR)]; + } + env->pc = env->regs[15]; + + env->xregs[15] = env->banked_r13[bank_number(ARM_CPU_MODE_HYP)]; + env->xregs[16] = env->banked_r13[bank_number(ARM_CPU_MODE_IRQ)]; + env->xregs[17] = env->banked_r14[bank_number(ARM_CPU_MODE_IRQ)]; + env->xregs[18] = env->banked_r13[bank_number(ARM_CPU_MODE_SVC)]; + env->xregs[19] = env->banked_r14[bank_number(ARM_CPU_MODE_SVC)]; + env->xregs[20] = env->banked_r13[bank_number(ARM_CPU_MODE_ABT)]; + env->xregs[21] = env->banked_r14[bank_number(ARM_CPU_MODE_ABT)]; + env->xregs[22] = env->banked_r13[bank_number(ARM_CPU_MODE_UND)]; + env->xregs[23] = env->banked_r14[bank_number(ARM_CPU_MODE_UND)]; + + for (i = 0; i < 5; i++) { + env->xregs[24+i] = env->fiq_regs[i]; + } + env->xregs[29] = env->banked_r13[bank_number(ARM_CPU_MODE_FIQ)]; + env->xregs[30] = env->banked_r14[bank_number(ARM_CPU_MODE_FIQ)]; +} + +static inline void aarch64_sync_64_to_32(CPUARMState *env) +{ + int i; + + /* We can blanket copy R[0:7] to X[0:7] */ + for (i = 0; i < 8; i++) { + env->regs[i] = env->xregs[i]; + } + + /* If we are in USR mode then we want to complete the above blanket + * copy as the XREGs will contain the most recent value. + */ + if ((env->uncached_cpsr & 0x1f) == ARM_CPU_MODE_USR) { + for (i = 8; i < 15; i++) { + env->regs[i] = env->xregs[i]; + } + } + + /* Update the user copies and banked registers so they are also up to + * date. + */ + for (i = 8; i < 13; i++) { + env->usr_regs[i-8] = env->xregs[i]; + } + env->banked_r13[bank_number(ARM_CPU_MODE_USR)] = env->xregs[13]; + env->banked_r14[bank_number(ARM_CPU_MODE_USR)] = env->xregs[14]; + + env->regs[15] = env->pc; + + env->banked_r13[bank_number(ARM_CPU_MODE_HYP)] = env->xregs[15]; + env->banked_r13[bank_number(ARM_CPU_MODE_IRQ)] = env->xregs[16]; + env->banked_r14[bank_number(ARM_CPU_MODE_IRQ)] = env->xregs[17]; + env->banked_r13[bank_number(ARM_CPU_MODE_SVC)] = env->xregs[18]; + env->banked_r14[bank_number(ARM_CPU_MODE_SVC)] = env->xregs[19]; + env->banked_r13[bank_number(ARM_CPU_MODE_ABT)] = env->xregs[20]; + env->banked_r14[bank_number(ARM_CPU_MODE_ABT)] = env->xregs[21]; + env->banked_r13[bank_number(ARM_CPU_MODE_UND)] = env->xregs[22]; + env->banked_r14[bank_number(ARM_CPU_MODE_UND)] = env->xregs[23]; + + for (i = 0; i < 5; i++) { + env->fiq_regs[i] = env->xregs[24+i]; + } + env->banked_r13[bank_number(ARM_CPU_MODE_FIQ)] = env->xregs[29]; + env->banked_r14[bank_number(ARM_CPU_MODE_FIQ)] = env->xregs[30]; +} + static inline void update_spsel(CPUARMState *env, uint32_t imm) { unsigned int cur_el = arm_current_el(env); diff --git a/target-arm/op_helper.c b/target-arm/op_helper.c index 2bed914..7713022 100644 --- a/target-arm/op_helper.c +++ b/target-arm/op_helper.c @@ -465,7 +465,7 @@ void HELPER(exception_return)(CPUARMState *env) int cur_el = arm_current_el(env); unsigned int spsr_idx = aarch64_banked_spsr_index(cur_el); uint32_t spsr = env->banked_spsr[spsr_idx]; - int new_el, i; + int new_el; aarch64_save_sp(env, cur_el); @@ -491,9 +491,7 @@ void HELPER(exception_return)(CPUARMState *env) if (!arm_singlestep_active(env)) { env->uncached_cpsr &= ~PSTATE_SS; } - for (i = 0; i < 15; i++) { - env->regs[i] = env->xregs[i]; - } + aarch64_sync_64_to_32(env); env->regs[15] = env->elr_el[1] & ~0x1; } else { -- 1.8.3.2