From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34084) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WIiom-0000rT-2i for qemu-devel@nongnu.org; Wed, 26 Feb 2014 13:02:52 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WIioe-0007GX-UT for qemu-devel@nongnu.org; Wed, 26 Feb 2014 13:02:51 -0500 Received: from mnementh.archaic.org.uk ([2001:8b0:1d0::1]:46191) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WIioe-0007Eu-NV for qemu-devel@nongnu.org; Wed, 26 Feb 2014 13:02:44 -0500 From: Peter Maydell Date: Wed, 26 Feb 2014 18:02:14 +0000 Message-Id: <1393437755-23586-25-git-send-email-peter.maydell@linaro.org> In-Reply-To: <1393437755-23586-1-git-send-email-peter.maydell@linaro.org> References: <1393437755-23586-1-git-send-email-peter.maydell@linaro.org> Subject: [Qemu-devel] [PULL 24/45] target-arm: Implement AArch64 VBAR_EL1 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Anthony Liguori Cc: Blue Swirl , qemu-devel@nongnu.org, Aurelien Jarno Implement the A64 view of the VBAR system register. Signed-off-by: Peter Maydell Reviewed-by: Peter Crosthwaite --- 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 4e87064..06953ac 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 7f76e0b..274dfbd 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -533,6 +533,12 @@ static void pmintenclr_write(CPUARMState *env, const ARMCPRegInfo *ri, static void 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; } @@ -622,7 +628,8 @@ 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 }, -- 1.9.0