diff options
Diffstat (limited to 'target-arm/helper.c')
| -rw-r--r-- | target-arm/helper.c | 159 |
1 files changed, 146 insertions, 13 deletions
diff --git a/target-arm/helper.c b/target-arm/helper.c index 9f14781d5d..9785cc5212 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -270,6 +270,10 @@ void cpu_reset(CPUARMState *env) } env->vfp.xregs[ARM_VFP_FPEXC] = 0; env->cp15.c2_base_mask = 0xffffc000u; + /* v7 performance monitor control register: same implementor + * field as main ID register, and we implement no event counters. + */ + env->cp15.c9_pmcr = (id & 0xff000000); #endif set_flush_to_zero(1, &env->vfp.standard_fp_status); set_flush_inputs_to_zero(1, &env->vfp.standard_fp_status); @@ -1588,6 +1592,81 @@ void HELPER(set_cp15)(CPUState *env, uint32_t insn, uint32_t val) case 1: /* TCM memory region registers. */ /* Not implemented. */ goto bad_reg; + case 12: /* Performance monitor control */ + /* Performance monitors are implementation defined in v7, + * but with an ARM recommended set of registers, which we + * follow (although we don't actually implement any counters) + */ + if (!arm_feature(env, ARM_FEATURE_V7)) { + goto bad_reg; + } + switch (op2) { + case 0: /* performance monitor control register */ + /* only the DP, X, D and E bits are writable */ + env->cp15.c9_pmcr &= ~0x39; + env->cp15.c9_pmcr |= (val & 0x39); + break; + case 1: /* Count enable set register */ + val &= (1 << 31); + env->cp15.c9_pmcnten |= val; + break; + case 2: /* Count enable clear */ + val &= (1 << 31); + env->cp15.c9_pmcnten &= ~val; + break; + case 3: /* Overflow flag status */ + env->cp15.c9_pmovsr &= ~val; + break; + case 4: /* Software increment */ + /* RAZ/WI since we don't implement the software-count event */ + break; + case 5: /* Event counter selection register */ + /* Since we don't implement any events, writing to this register + * is actually UNPREDICTABLE. So we choose to RAZ/WI. + */ + break; + default: + goto bad_reg; + } + break; + case 13: /* Performance counters */ + if (!arm_feature(env, ARM_FEATURE_V7)) { + goto bad_reg; + } + switch (op2) { + case 0: /* Cycle count register: not implemented, so RAZ/WI */ + break; + case 1: /* Event type select */ + env->cp15.c9_pmxevtyper = val & 0xff; + break; + case 2: /* Event count register */ + /* Unimplemented (we have no events), RAZ/WI */ + break; + default: + goto bad_reg; + } + break; + case 14: /* Performance monitor control */ + if (!arm_feature(env, ARM_FEATURE_V7)) { + goto bad_reg; + } + switch (op2) { + case 0: /* user enable */ + env->cp15.c9_pmuserenr = val & 1; + /* changes access rights for cp registers, so flush tbs */ + tb_flush(env); + break; + case 1: /* interrupt enable set */ + /* We have no event counters so only the C bit can be changed */ + val &= (1 << 31); + env->cp15.c9_pminten |= val; + break; + case 2: /* interrupt enable clear */ + val &= (1 << 31); + env->cp15.c9_pminten &= ~val; + break; + } + break; default: goto bad_reg; } @@ -1879,27 +1958,81 @@ uint32_t HELPER(get_cp15)(CPUState *env, uint32_t insn) return 0; case 8: /* MMU TLB control. */ goto bad_reg; - case 9: /* Cache lockdown. */ - switch (op1) { - case 0: /* L1 cache. */ - if (arm_feature(env, ARM_FEATURE_OMAPCP)) - return 0; + case 9: + switch (crm) { + case 0: /* Cache lockdown */ + switch (op1) { + case 0: /* L1 cache. */ + if (arm_feature(env, ARM_FEATURE_OMAPCP)) { + return 0; + } + switch (op2) { + case 0: + return env->cp15.c9_data; + case 1: + return env->cp15.c9_insn; + default: + goto bad_reg; + } + case 1: /* L2 cache */ + if (crm != 0) { + goto bad_reg; + } + /* L2 Lockdown and Auxiliary control. */ + return 0; + default: + goto bad_reg; + } + break; + case 12: /* Performance monitor control */ + if (!arm_feature(env, ARM_FEATURE_V7)) { + goto bad_reg; + } switch (op2) { - case 0: - return env->cp15.c9_data; - case 1: - return env->cp15.c9_insn; + case 0: /* performance monitor control register */ + return env->cp15.c9_pmcr; + case 1: /* count enable set */ + case 2: /* count enable clear */ + return env->cp15.c9_pmcnten; + case 3: /* overflow flag status */ + return env->cp15.c9_pmovsr; + case 4: /* software increment */ + case 5: /* event counter selection register */ + return 0; /* Unimplemented, RAZ/WI */ default: goto bad_reg; } - case 1: /* L2 cache */ - if (crm != 0) + case 13: /* Performance counters */ + if (!arm_feature(env, ARM_FEATURE_V7)) { + goto bad_reg; + } + switch (op2) { + case 1: /* Event type select */ + return env->cp15.c9_pmxevtyper; + case 0: /* Cycle count register */ + case 2: /* Event count register */ + /* Unimplemented, so RAZ/WI */ + return 0; + default: goto bad_reg; - /* L2 Lockdown and Auxiliary control. */ - return 0; + } + case 14: /* Performance monitor control */ + if (!arm_feature(env, ARM_FEATURE_V7)) { + goto bad_reg; + } + switch (op2) { + case 0: /* user enable */ + return env->cp15.c9_pmuserenr; + case 1: /* interrupt enable set */ + case 2: /* interrupt enable clear */ + return env->cp15.c9_pminten; + default: + goto bad_reg; + } default: goto bad_reg; } + break; case 10: /* MMU TLB lockdown. */ /* ??? TLB lockdown not implemented. */ return 0; |