From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50889) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1W5hgh-00056o-7u for qemu-devel@nongnu.org; Tue, 21 Jan 2014 15:12:44 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1W5hgf-0007ZE-TK for qemu-devel@nongnu.org; Tue, 21 Jan 2014 15:12:43 -0500 Received: from mnementh.archaic.org.uk ([2001:8b0:1d0::1]:44951) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1W5hgf-0007WW-MX for qemu-devel@nongnu.org; Tue, 21 Jan 2014 15:12:41 -0500 From: Peter Maydell Date: Tue, 21 Jan 2014 20:12:24 +0000 Message-Id: <1390335150-13470-19-git-send-email-peter.maydell@linaro.org> In-Reply-To: <1390335150-13470-1-git-send-email-peter.maydell@linaro.org> References: <1390335150-13470-1-git-send-email-peter.maydell@linaro.org> Subject: [Qemu-devel] [PATCH 18/24] target-arm: Implement AArch64 VBAR_EL1 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: 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 Implement the A64 view of the VBAR system register. Signed-off-by: Peter Maydell --- target-arm/cpu.h | 2 +- target-arm/helper.c | 9 ++++++++- 2 files changed, 9 insertions(+), 2 deletions(-) diff --git a/target-arm/cpu.h b/target-arm/cpu.h index a7d6274..6f4d174 100644 --- a/target-arm/cpu.h +++ b/target-arm/cpu.h @@ -200,7 +200,7 @@ typedef struct CPUARMState { uint32_t c9_pmuserenr; /* perf monitor user enable */ uint32_t c9_pminten; /* perf monitor interrupt enables */ uint64_t mair_el1; - uint32_t c12_vbar; /* vector base address register */ + uint64_t c12_vbar; /* vector base address register */ uint32_t c13_fcse; /* FCSE PID. */ uint32_t c13_context; /* Context ID. */ uint64_t tpidr_el0; /* User RW Thread register. */ diff --git a/target-arm/helper.c b/target-arm/helper.c index 5912b13..e2ae159 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -580,6 +580,12 @@ static int pmintenclr_write(CPUARMState *env, const ARMCPRegInfo *ri, static int vbar_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) { + /* Note that even though the AArch64 view of this register has bits + * [10:0] all RES0 we can only mask the bottom 5, to comply with the + * architectural requirements for bits which are RES0 only in some + * contexts. (ARMv8 would permit us to do no masking at all, but ARMv7 + * requires the bottom five bits to be RAZ/WI because they're UNK/SBZP.) + */ env->cp15.c12_vbar = value & ~0x1Ful; return 0; } @@ -669,7 +675,8 @@ static const ARMCPRegInfo v7_cp_reginfo[] = { .access = PL1_RW, .type = ARM_CP_NO_MIGRATE, .fieldoffset = offsetof(CPUARMState, cp15.c9_pminten), .resetvalue = 0, .writefn = pmintenclr_write, }, - { .name = "VBAR", .cp = 15, .crn = 12, .crm = 0, .opc1 = 0, .opc2 = 0, + { .name = "VBAR", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .crn = 12, .crm = 0, .opc1 = 0, .opc2 = 0, .access = PL1_RW, .writefn = vbar_write, .fieldoffset = offsetof(CPUARMState, cp15.c12_vbar), .resetvalue = 0 }, -- 1.8.5