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authorPeter Maydell <peter.maydell@linaro.org>2014-02-26 17:20:04 +0000
committerPeter Maydell <peter.maydell@linaro.org>2014-02-26 17:20:04 +0000
commita505d7fe5f638c4aaba93150f71968147f7c2b3a (patch)
treefff3c44869f59c007446e4d6c1e130da13863208
parentcb2e37dffaab38e962b86b3ca6f4cf0de22d9e69 (diff)
downloadqemu-arm-a505d7fe5f638c4aaba93150f71968147f7c2b3a.tar.gz
target-arm: Implement AArch64 VBAR_EL1
Implement the A64 view of the VBAR system register. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
-rw-r--r--target-arm/cpu.h2
-rw-r--r--target-arm/helper.c9
2 files changed, 9 insertions, 2 deletions
diff --git a/target-arm/cpu.h b/target-arm/cpu.h
index 4e87064920..06953ac9bd 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 7f76e0b974..274dfbde3c 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 },