Handle SCS reserved registers listed in ARMv6-M ARM D3.6.1. All reserved registers are RAZ/WI.
Signed-off-by: Julia Suvorova <jus...@mail.ru> --- hw/intc/armv7m_nvic.c | 69 +++++++++++++++++++++++++++++++++++-------- 1 file changed, 57 insertions(+), 12 deletions(-) diff --git a/hw/intc/armv7m_nvic.c b/hw/intc/armv7m_nvic.c index aba4510c70..fb61a1d08d 100644 --- a/hw/intc/armv7m_nvic.c +++ b/hw/intc/armv7m_nvic.c @@ -865,6 +865,9 @@ static uint32_t nvic_readl(NVICState *s, uint32_t offset, MemTxAttrs attrs) } return val; case 0xd10: /* System Control. */ + if (!arm_feature(&cpu->env, ARM_FEATURE_V7)) { + return 0; + } return cpu->env.v7m.scr[attrs.secure]; case 0xd14: /* Configuration Control. */ /* The BFHFNMIGN bit is the only non-banked bit; we @@ -986,12 +989,21 @@ static uint32_t nvic_readl(NVICState *s, uint32_t offset, MemTxAttrs attrs) } return val; case 0xd2c: /* Hard Fault Status. */ + if (!arm_feature(&cpu->env, ARM_FEATURE_V7)) { + return 0; + } return cpu->env.v7m.hfsr; case 0xd30: /* Debug Fault Status. */ return cpu->env.v7m.dfsr; case 0xd34: /* MMFAR MemManage Fault Address */ + if (!arm_feature(&cpu->env, ARM_FEATURE_V7)) { + return 0; + } return cpu->env.v7m.mmfar[attrs.secure]; case 0xd38: /* Bus Fault Address. */ + if (!arm_feature(&cpu->env, ARM_FEATURE_V7)) { + return 0; + } return cpu->env.v7m.bfar; case 0xd3c: /* Aux Fault Status. */ /* TODO: Implement fault status registers. */ @@ -1292,8 +1304,10 @@ static void nvic_writel(NVICState *s, uint32_t offset, uint32_t value, * QEMU's implementation ignores SEVONPEND and SLEEPONEXIT, which * is architecturally permitted. */ - value &= ~(R_V7M_SCR_SLEEPDEEP_MASK | R_V7M_SCR_SLEEPDEEPS_MASK); - cpu->env.v7m.scr[attrs.secure] = value; + if (arm_feature(&cpu->env, ARM_FEATURE_V7)) { + value &= ~(R_V7M_SCR_SLEEPDEEP_MASK | R_V7M_SCR_SLEEPDEEPS_MASK); + cpu->env.v7m.scr[attrs.secure] = value; + } break; case 0xd14: /* Configuration Control. */ /* Enforce RAZ/WI on reserved and must-RAZ/WI bits */ @@ -1388,16 +1402,22 @@ static void nvic_writel(NVICState *s, uint32_t offset, uint32_t value, nvic_irq_update(s); break; case 0xd2c: /* Hard Fault Status. */ - cpu->env.v7m.hfsr &= ~value; /* W1C */ + if (arm_feature(&cpu->env, ARM_FEATURE_V7)) { + cpu->env.v7m.hfsr &= ~value; /* W1C */ + } break; case 0xd30: /* Debug Fault Status. */ cpu->env.v7m.dfsr &= ~value; /* W1C */ break; case 0xd34: /* Mem Manage Address. */ - cpu->env.v7m.mmfar[attrs.secure] = value; + if (arm_feature(&cpu->env, ARM_FEATURE_V7)) { + cpu->env.v7m.mmfar[attrs.secure] = value; + } return; case 0xd38: /* Bus Fault Address. */ - cpu->env.v7m.bfar = value; + if (arm_feature(&cpu->env, ARM_FEATURE_V7)) { + cpu->env.v7m.bfar = value; + } return; case 0xd3c: /* Aux Fault Status. */ qemu_log_mask(LOG_UNIMP, @@ -1624,13 +1644,13 @@ static void nvic_writel(NVICState *s, uint32_t offset, uint32_t value, cpu->env.v7m.sfsr = value; break; case 0xf00: /* Software Triggered Interrupt Register */ - { - int excnum = (value & 0x1ff) + NVIC_FIRST_IRQ; - if (excnum < s->num_irq) { - armv7m_nvic_set_pending(s, excnum, false); + if (arm_feature(&cpu->env, ARM_FEATURE_V7)) { + int excnum = (value & 0x1ff) + NVIC_FIRST_IRQ; + if (excnum < s->num_irq) { + armv7m_nvic_set_pending(s, excnum, false); + } } break; - } case 0xf50: /* ICIALLU */ case 0xf58: /* ICIMVAU */ case 0xf5c: /* DCIMVAC */ @@ -1775,7 +1795,13 @@ static MemTxResult nvic_sysreg_read(void *opaque, hwaddr addr, } } break; - case 0xd18 ... 0xd23: /* System Handler Priority (SHPR1, SHPR2, SHPR3) */ + case 0xd18: /* System Handler Priority (SHPR1) */ + if (!arm_feature(&s->cpu->env, ARM_FEATURE_V7)) { + val = 0; + break; + } + /* fall through */ + case 0xd1c ... 0xd23: /* System Handler Priority (SHPR2, SHPR3) */ val = 0; for (i = 0; i < size; i++) { unsigned hdlidx = (offset - 0xd14) + i; @@ -1791,10 +1817,20 @@ static MemTxResult nvic_sysreg_read(void *opaque, hwaddr addr, /* The BFSR bits [15:8] are shared between security states * and we store them in the NS copy */ + if (!arm_feature(&s->cpu->env, ARM_FEATURE_V7)) { + val = 0; + break; + }; val = s->cpu->env.v7m.cfsr[attrs.secure]; val |= s->cpu->env.v7m.cfsr[M_REG_NS] & R_V7M_CFSR_BFSR_MASK; val = extract32(val, (offset - 0xd28) * 8, size * 8); break; + case 0xd40 ... 0xd7c: /* CPUID registers */ + if (!arm_feature(&s->cpu->env, ARM_FEATURE_V7)) { + val = 0; + break; + } + goto proceed_to_readl; case 0xfe0 ... 0xfff: /* ID. */ if (offset & 3) { val = 0; @@ -1803,6 +1839,7 @@ static MemTxResult nvic_sysreg_read(void *opaque, hwaddr addr, } break; default: + proceed_to_readl: if (size == 4) { val = nvic_readl(s, offset, attrs); } else { @@ -1882,7 +1919,12 @@ static MemTxResult nvic_sysreg_write(void *opaque, hwaddr addr, } nvic_irq_update(s); return MEMTX_OK; - case 0xd18 ... 0xd23: /* System Handler Priority (SHPR1, SHPR2, SHPR3) */ + case 0xd18: /* System Handler Priority (SHPR1) */ + if (!arm_feature(&s->cpu->env, ARM_FEATURE_V7)) { + return MEMTX_OK; + } + /* fall through */ + case 0xd1c ... 0xd23: /* System Handler Priority (SHPR2, SHPR3) */ for (i = 0; i < size; i++) { unsigned hdlidx = (offset - 0xd14) + i; int newprio = extract32(value, i * 8, 8); @@ -1899,6 +1941,9 @@ static MemTxResult nvic_sysreg_write(void *opaque, hwaddr addr, /* All bits are W1C, so construct 32 bit value with 0s in * the parts not written by the access size */ + if (!arm_feature(&s->cpu->env, ARM_FEATURE_V7)) { + return MEMTX_OK; + } value <<= ((offset - 0xd28) * 8); s->cpu->env.v7m.cfsr[attrs.secure] &= ~value; -- 2.17.1