diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2014-04-15 19:18:44 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2014-04-17 21:34:04 +0100 |
| commit | a50c0f51339ed1df0a2e289513e3e2bf5b5ca45c (patch) | |
| tree | 21ccde90de2f8ff2c25e6c3fd617da9233b9ca88 | |
| parent | 52e60cdd342dc48116edb81b443ba8c0a0c6f1a3 (diff) | |
target-arm: Implement ARMv8 MVFR registers
For ARMv8 there are two changes to the MVFR media feature registers:
* there is a new MVFR2 which is accessible from 32 bit code
* 64 bit code accesses these via the usual sysreg instructions
rather than with a floating-point specific instruction
Implement this.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
| -rw-r--r-- | target-arm/cpu-qom.h | 1 | ||||
| -rw-r--r-- | target-arm/cpu.c | 1 | ||||
| -rw-r--r-- | target-arm/cpu.h | 1 | ||||
| -rw-r--r-- | target-arm/helper.c | 12 | ||||
| -rw-r--r-- | target-arm/translate.c | 10 |
5 files changed, 23 insertions, 2 deletions
diff --git a/target-arm/cpu-qom.h b/target-arm/cpu-qom.h index afdee9d683..2b6b3708f8 100644 --- a/target-arm/cpu-qom.h +++ b/target-arm/cpu-qom.h @@ -116,6 +116,7 @@ typedef struct ARMCPU { uint32_t reset_fpsid; uint32_t mvfr0; uint32_t mvfr1; + uint32_t mvfr2; uint32_t ctr; uint32_t reset_sctlr; uint32_t id_pfr0; diff --git a/target-arm/cpu.c b/target-arm/cpu.c index a3c7492846..a78a36b643 100644 --- a/target-arm/cpu.c +++ b/target-arm/cpu.c @@ -88,6 +88,7 @@ static void arm_cpu_reset(CPUState *s) env->vfp.xregs[ARM_VFP_FPSID] = cpu->reset_fpsid; env->vfp.xregs[ARM_VFP_MVFR0] = cpu->mvfr0; env->vfp.xregs[ARM_VFP_MVFR1] = cpu->mvfr1; + env->vfp.xregs[ARM_VFP_MVFR2] = cpu->mvfr2; if (arm_feature(env, ARM_FEATURE_IWMMXT)) { env->iwmmxt.cregs[ARM_IWMMXT_wCID] = 0x69051000 | 'Q'; diff --git a/target-arm/cpu.h b/target-arm/cpu.h index 0ce4c26d16..ec0306b7a3 100644 --- a/target-arm/cpu.h +++ b/target-arm/cpu.h @@ -572,6 +572,7 @@ enum arm_cpu_mode { /* VFP system registers. */ #define ARM_VFP_FPSID 0 #define ARM_VFP_FPSCR 1 +#define ARM_VFP_MVFR2 5 #define ARM_VFP_MVFR1 6 #define ARM_VFP_MVFR0 7 #define ARM_VFP_FPEXC 8 diff --git a/target-arm/helper.c b/target-arm/helper.c index e9b64f364a..cf5fab85a5 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -2155,6 +2155,18 @@ void register_cp_regs_for_features(ARMCPU *cpu) .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 7, .opc2 = 1, .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = cpu->id_aa64mmfr1 }, + { .name = "MVFR0_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 3, .opc2 = 0, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->mvfr0 }, + { .name = "MVFR1_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 3, .opc2 = 1, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->mvfr1 }, + { .name = "MVFR2_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 3, .opc2 = 2, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->mvfr2 }, REGINFO_SENTINEL }; define_arm_cp_regs(cpu, v8_idregs); diff --git a/target-arm/translate.c b/target-arm/translate.c index 03e2c00e94..f7b5dafcb7 100644 --- a/target-arm/translate.c +++ b/target-arm/translate.c @@ -2967,9 +2967,10 @@ static int disas_vfp_insn(CPUARMState * env, DisasContext *s, uint32_t insn) if ((insn & 0x0fe00fff) != 0x0ee00a10) return 1; rn = (insn >> 16) & 0xf; - if (rn != ARM_VFP_FPSID && rn != ARM_VFP_FPEXC - && rn != ARM_VFP_MVFR1 && rn != ARM_VFP_MVFR0) + if (rn != ARM_VFP_FPSID && rn != ARM_VFP_FPEXC && rn != ARM_VFP_MVFR2 + && rn != ARM_VFP_MVFR1 && rn != ARM_VFP_MVFR0) { return 1; + } } if (extract32(insn, 28, 4) == 0xf) { @@ -3115,6 +3116,11 @@ static int disas_vfp_insn(CPUARMState * env, DisasContext *s, uint32_t insn) gen_helper_vfp_get_fpscr(tmp, cpu_env); } break; + case ARM_VFP_MVFR2: + if (!arm_feature(env, ARM_FEATURE_V8)) { + return 1; + } + /* fall through */ case ARM_VFP_MVFR0: case ARM_VFP_MVFR1: if (IS_USER(s) |