From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38905) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1W9GUY-0000Ei-7N for qemu-devel@nongnu.org; Fri, 31 Jan 2014 10:58:55 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1W9GUX-0005UU-3O for qemu-devel@nongnu.org; Fri, 31 Jan 2014 10:58:54 -0500 Received: from mnementh.archaic.org.uk ([2001:8b0:1d0::1]:45421) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1W9GUW-0005Pb-Mf for qemu-devel@nongnu.org; Fri, 31 Jan 2014 10:58:53 -0500 From: Peter Maydell Date: Fri, 31 Jan 2014 15:45:42 +0000 Message-Id: <1391183143-30724-35-git-send-email-peter.maydell@linaro.org> In-Reply-To: <1391183143-30724-1-git-send-email-peter.maydell@linaro.org> References: <1391183143-30724-1-git-send-email-peter.maydell@linaro.org> Subject: [Qemu-devel] [PATCH v2 34/35] target-arm: Implement AArch64 dummy breakpoint and watchpoint registers List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Rob Herring , Peter Crosthwaite , patches@linaro.org, Michael Matz , Alexander Graf , Claudio Fontana , Dirk Mueller , Will Newton , Laurent Desnogues , =?UTF-8?q?Alex=20Benn=C3=A9e?= , kvmarm@lists.cs.columbia.edu, Christoffer Dall , Richard Henderson In AArch64 the breakpoint and watchpoint registers are mandatory, so the kernel always accesses them on bootup. Implement dummy versions, which read as written but have no actual effect. Signed-off-by: Peter Maydell --- target-arm/cpu.h | 4 ++++ target-arm/helper.c | 32 ++++++++++++++++++++++++++++++++ 2 files changed, 36 insertions(+) diff --git a/target-arm/cpu.h b/target-arm/cpu.h index 24a8e93..267d5ae 100644 --- a/target-arm/cpu.h +++ b/target-arm/cpu.h @@ -216,6 +216,10 @@ typedef struct CPUARMState { uint32_t c15_diagnostic; /* diagnostic register */ uint32_t c15_power_diagnostic; uint32_t c15_power_control; /* power control */ + uint64_t dbgbvr[16]; /* breakpoint value registers */ + uint64_t dbgbcr[16]; /* breakpoint control registers */ + uint64_t dbgwvr[16]; /* watchpoint value registers */ + uint64_t dbgwcr[16]; /* watchpoint control registers */ } cp15; struct { diff --git a/target-arm/helper.c b/target-arm/helper.c index eb37e7e..1621030 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -1787,6 +1787,37 @@ static CPAccessResult ctr_el0_access(CPUARMState *env, const ARMCPRegInfo *ri) return CP_ACCESS_OK; } +static void define_aarch64_debug_regs(ARMCPU *cpu) +{ + /* Define breakpoint and watchpoint registers. These do nothing + * but read as written, for now. + */ + int i; + + for (i = 0; i < 16; i++) { + ARMCPRegInfo dbgregs[] = { + { .name = "DBGBVR", .state = ARM_CP_STATE_AA64, + .opc0 = 2, .opc1 = 0, .crn = 0, .crm = i, .opc2 = 4, + .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.dbgbvr[i]) }, + { .name = "DBGBCR", .state = ARM_CP_STATE_AA64, + .opc0 = 2, .opc1 = 0, .crn = 0, .crm = i, .opc2 = 5, + .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.dbgbcr[i]) }, + { .name = "DBGWVR", .state = ARM_CP_STATE_AA64, + .opc0 = 2, .opc1 = 0, .crn = 0, .crm = i, .opc2 = 6, + .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.dbgwvr[i]) }, + { .name = "DBGWCR", .state = ARM_CP_STATE_AA64, + .opc0 = 2, .opc1 = 0, .crn = 0, .crm = i, .opc2 = 7, + .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.dbgwcr[i]) }, + REGINFO_SENTINEL + }; + define_arm_cp_regs(cpu, dbgregs); + } +} + void register_cp_regs_for_features(ARMCPU *cpu) { /* Register all the coprocessor registers based on feature bits */ @@ -1928,6 +1959,7 @@ void register_cp_regs_for_features(ARMCPU *cpu) }; define_arm_cp_regs(cpu, v8_idregs); define_arm_cp_regs(cpu, v8_cp_reginfo); + define_aarch64_debug_regs(cpu); } if (arm_feature(env, ARM_FEATURE_MPU)) { /* These are the MPU registers prior to PMSAv6. Any new -- 1.8.5