1864 lines
52 KiB
C
1864 lines
52 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "cpu.h"
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#include "exec-all.h"
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#include "gdbstub.h"
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static uint32_t cortexa8_cp15_c0_c1[8] =
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{ 0x1031, 0x11, 0x400, 0, 0x31100003, 0x20000000, 0x01202000, 0x11 };
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static uint32_t cortexa8_cp15_c0_c2[8] =
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{ 0x00101111, 0x12112111, 0x21232031, 0x11112131, 0x00111142, 0, 0, 0 };
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static uint32_t mpcore_cp15_c0_c1[8] =
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{ 0x111, 0x1, 0, 0x2, 0x01100103, 0x10020302, 0x01222000, 0 };
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static uint32_t mpcore_cp15_c0_c2[8] =
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{ 0x00100011, 0x12002111, 0x11221011, 0x01102131, 0x141, 0, 0, 0 };
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static uint32_t arm1136_cp15_c0_c1[8] =
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{ 0x111, 0x1, 0x2, 0x3, 0x01130003, 0x10030302, 0x01222110, 0 };
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static uint32_t arm1136_cp15_c0_c2[8] =
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{ 0x00140011, 0x12002111, 0x11231111, 0x01102131, 0x141, 0, 0, 0 };
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static uint32_t cpu_arm_find_by_name(const char *name);
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static inline void set_feature(CPUARMState *env, int feature)
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{
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env->features |= 1u << feature;
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}
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static void cpu_reset_model_id(CPUARMState *env, uint32_t id)
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{
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env->cp15.c0_cpuid = id;
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switch (id) {
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case ARM_CPUID_ARM926:
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set_feature(env, ARM_FEATURE_VFP);
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env->vfp.xregs[ARM_VFP_FPSID] = 0x41011090;
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env->cp15.c0_cachetype = 0x1dd20d2;
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env->cp15.c1_sys = 0x00090078;
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break;
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case ARM_CPUID_ARM946:
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set_feature(env, ARM_FEATURE_MPU);
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env->cp15.c0_cachetype = 0x0f004006;
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env->cp15.c1_sys = 0x00000078;
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break;
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case ARM_CPUID_ARM1026:
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set_feature(env, ARM_FEATURE_VFP);
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set_feature(env, ARM_FEATURE_AUXCR);
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env->vfp.xregs[ARM_VFP_FPSID] = 0x410110a0;
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env->cp15.c0_cachetype = 0x1dd20d2;
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env->cp15.c1_sys = 0x00090078;
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break;
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case ARM_CPUID_ARM1136:
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set_feature(env, ARM_FEATURE_V6);
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set_feature(env, ARM_FEATURE_VFP);
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set_feature(env, ARM_FEATURE_AUXCR);
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env->vfp.xregs[ARM_VFP_FPSID] = 0x410120b4;
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env->vfp.xregs[ARM_VFP_MVFR0] = 0x11111111;
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env->vfp.xregs[ARM_VFP_MVFR1] = 0x00000000;
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memcpy(env->cp15.c0_c1, arm1136_cp15_c0_c1, 8 * sizeof(uint32_t));
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memcpy(env->cp15.c0_c1, arm1136_cp15_c0_c2, 8 * sizeof(uint32_t));
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env->cp15.c0_cachetype = 0x1dd20d2;
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break;
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case ARM_CPUID_ARM11MPCORE:
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set_feature(env, ARM_FEATURE_V6);
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set_feature(env, ARM_FEATURE_V6K);
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set_feature(env, ARM_FEATURE_VFP);
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set_feature(env, ARM_FEATURE_AUXCR);
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env->vfp.xregs[ARM_VFP_FPSID] = 0x410120b4;
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env->vfp.xregs[ARM_VFP_MVFR0] = 0x11111111;
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env->vfp.xregs[ARM_VFP_MVFR1] = 0x00000000;
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memcpy(env->cp15.c0_c1, mpcore_cp15_c0_c1, 8 * sizeof(uint32_t));
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memcpy(env->cp15.c0_c1, mpcore_cp15_c0_c2, 8 * sizeof(uint32_t));
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env->cp15.c0_cachetype = 0x1dd20d2;
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break;
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case ARM_CPUID_CORTEXA8:
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set_feature(env, ARM_FEATURE_V6);
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set_feature(env, ARM_FEATURE_V6K);
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set_feature(env, ARM_FEATURE_V7);
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set_feature(env, ARM_FEATURE_AUXCR);
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set_feature(env, ARM_FEATURE_THUMB2);
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set_feature(env, ARM_FEATURE_VFP);
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set_feature(env, ARM_FEATURE_VFP3);
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set_feature(env, ARM_FEATURE_NEON);
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env->vfp.xregs[ARM_VFP_FPSID] = 0x410330c0;
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env->vfp.xregs[ARM_VFP_MVFR0] = 0x11110222;
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env->vfp.xregs[ARM_VFP_MVFR1] = 0x00011100;
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memcpy(env->cp15.c0_c1, cortexa8_cp15_c0_c1, 8 * sizeof(uint32_t));
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memcpy(env->cp15.c0_c1, cortexa8_cp15_c0_c2, 8 * sizeof(uint32_t));
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env->cp15.c0_cachetype = 0x1dd20d2;
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break;
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case ARM_CPUID_CORTEXM3:
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set_feature(env, ARM_FEATURE_V6);
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set_feature(env, ARM_FEATURE_THUMB2);
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set_feature(env, ARM_FEATURE_V7);
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set_feature(env, ARM_FEATURE_M);
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set_feature(env, ARM_FEATURE_DIV);
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break;
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case ARM_CPUID_ANY: /* For userspace emulation. */
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set_feature(env, ARM_FEATURE_V6);
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set_feature(env, ARM_FEATURE_V6K);
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set_feature(env, ARM_FEATURE_V7);
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set_feature(env, ARM_FEATURE_THUMB2);
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set_feature(env, ARM_FEATURE_VFP);
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set_feature(env, ARM_FEATURE_VFP3);
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set_feature(env, ARM_FEATURE_NEON);
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set_feature(env, ARM_FEATURE_DIV);
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break;
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case ARM_CPUID_TI915T:
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case ARM_CPUID_TI925T:
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set_feature(env, ARM_FEATURE_OMAPCP);
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env->cp15.c0_cpuid = ARM_CPUID_TI925T; /* Depends on wiring. */
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env->cp15.c0_cachetype = 0x5109149;
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env->cp15.c1_sys = 0x00000070;
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env->cp15.c15_i_max = 0x000;
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env->cp15.c15_i_min = 0xff0;
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break;
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case ARM_CPUID_PXA250:
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case ARM_CPUID_PXA255:
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case ARM_CPUID_PXA260:
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case ARM_CPUID_PXA261:
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case ARM_CPUID_PXA262:
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set_feature(env, ARM_FEATURE_XSCALE);
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/* JTAG_ID is ((id << 28) | 0x09265013) */
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env->cp15.c0_cachetype = 0xd172172;
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env->cp15.c1_sys = 0x00000078;
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break;
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case ARM_CPUID_PXA270_A0:
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case ARM_CPUID_PXA270_A1:
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case ARM_CPUID_PXA270_B0:
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case ARM_CPUID_PXA270_B1:
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case ARM_CPUID_PXA270_C0:
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case ARM_CPUID_PXA270_C5:
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set_feature(env, ARM_FEATURE_XSCALE);
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/* JTAG_ID is ((id << 28) | 0x09265013) */
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set_feature(env, ARM_FEATURE_IWMMXT);
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env->iwmmxt.cregs[ARM_IWMMXT_wCID] = 0x69051000 | 'Q';
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env->cp15.c0_cachetype = 0xd172172;
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env->cp15.c1_sys = 0x00000078;
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break;
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default:
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cpu_abort(env, "Bad CPU ID: %x\n", id);
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break;
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}
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}
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void cpu_reset(CPUARMState *env)
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{
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uint32_t id;
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id = env->cp15.c0_cpuid;
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memset(env, 0, offsetof(CPUARMState, breakpoints));
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if (id)
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cpu_reset_model_id(env, id);
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#if defined (CONFIG_USER_ONLY)
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env->uncached_cpsr = ARM_CPU_MODE_USR;
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env->vfp.xregs[ARM_VFP_FPEXC] = 1 << 30;
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#else
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/* SVC mode with interrupts disabled. */
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env->uncached_cpsr = ARM_CPU_MODE_SVC | CPSR_A | CPSR_F | CPSR_I;
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/* On ARMv7-M the CPSR_I is the value of the PRIMASK register, and is
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clear at reset. */
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if (IS_M(env))
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env->uncached_cpsr &= ~CPSR_I;
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env->vfp.xregs[ARM_VFP_FPEXC] = 0;
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#endif
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env->regs[15] = 0;
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tlb_flush(env, 1);
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}
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CPUARMState *cpu_arm_init(const char *cpu_model)
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{
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CPUARMState *env;
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uint32_t id;
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id = cpu_arm_find_by_name(cpu_model);
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if (id == 0)
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return NULL;
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env = qemu_mallocz(sizeof(CPUARMState));
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if (!env)
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return NULL;
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cpu_exec_init(env);
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env->cpu_model_str = cpu_model;
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env->cp15.c0_cpuid = id;
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cpu_reset(env);
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return env;
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}
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struct arm_cpu_t {
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uint32_t id;
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const char *name;
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};
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static const struct arm_cpu_t arm_cpu_names[] = {
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{ ARM_CPUID_ARM926, "arm926"},
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{ ARM_CPUID_ARM946, "arm946"},
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{ ARM_CPUID_ARM1026, "arm1026"},
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{ ARM_CPUID_ARM1136, "arm1136"},
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{ ARM_CPUID_ARM11MPCORE, "arm11mpcore"},
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{ ARM_CPUID_CORTEXM3, "cortex-m3"},
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{ ARM_CPUID_CORTEXA8, "cortex-a8"},
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{ ARM_CPUID_TI925T, "ti925t" },
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{ ARM_CPUID_PXA250, "pxa250" },
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{ ARM_CPUID_PXA255, "pxa255" },
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{ ARM_CPUID_PXA260, "pxa260" },
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{ ARM_CPUID_PXA261, "pxa261" },
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{ ARM_CPUID_PXA262, "pxa262" },
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{ ARM_CPUID_PXA270, "pxa270" },
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{ ARM_CPUID_PXA270_A0, "pxa270-a0" },
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{ ARM_CPUID_PXA270_A1, "pxa270-a1" },
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{ ARM_CPUID_PXA270_B0, "pxa270-b0" },
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{ ARM_CPUID_PXA270_B1, "pxa270-b1" },
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{ ARM_CPUID_PXA270_C0, "pxa270-c0" },
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{ ARM_CPUID_PXA270_C5, "pxa270-c5" },
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{ ARM_CPUID_ANY, "mc1322x" },
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{ ARM_CPUID_ANY, "any"},
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{ 0, NULL}
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};
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void arm_cpu_list(FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt, ...))
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{
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int i;
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(*cpu_fprintf)(f, "Available CPUs:\n");
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for (i = 0; arm_cpu_names[i].name; i++) {
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(*cpu_fprintf)(f, " %s\n", arm_cpu_names[i].name);
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}
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}
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/* return 0 if not found */
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static uint32_t cpu_arm_find_by_name(const char *name)
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{
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int i;
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uint32_t id;
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id = 0;
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for (i = 0; arm_cpu_names[i].name; i++) {
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if (strcmp(name, arm_cpu_names[i].name) == 0) {
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id = arm_cpu_names[i].id;
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break;
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}
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}
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return id;
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}
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void cpu_arm_close(CPUARMState *env)
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{
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free(env);
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}
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/* Polynomial multiplication is like integer multiplcation except the
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partial products are XORed, not added. */
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uint32_t helper_neon_mul_p8(uint32_t op1, uint32_t op2)
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{
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uint32_t mask;
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uint32_t result;
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result = 0;
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while (op1) {
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mask = 0;
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if (op1 & 1)
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mask |= 0xff;
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if (op1 & (1 << 8))
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mask |= (0xff << 8);
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if (op1 & (1 << 16))
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mask |= (0xff << 16);
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if (op1 & (1 << 24))
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mask |= (0xff << 24);
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result ^= op2 & mask;
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op1 = (op1 >> 1) & 0x7f7f7f7f;
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op2 = (op2 << 1) & 0xfefefefe;
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}
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return result;
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}
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uint32_t cpsr_read(CPUARMState *env)
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{
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int ZF;
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ZF = (env->NZF == 0);
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return env->uncached_cpsr | (env->NZF & 0x80000000) | (ZF << 30) |
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(env->CF << 29) | ((env->VF & 0x80000000) >> 3) | (env->QF << 27)
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| (env->thumb << 5) | ((env->condexec_bits & 3) << 25)
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| ((env->condexec_bits & 0xfc) << 8)
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| (env->GE << 16);
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}
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void cpsr_write(CPUARMState *env, uint32_t val, uint32_t mask)
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{
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/* NOTE: N = 1 and Z = 1 cannot be stored currently */
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if (mask & CPSR_NZCV) {
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env->NZF = (val & 0xc0000000) ^ 0x40000000;
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env->CF = (val >> 29) & 1;
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env->VF = (val << 3) & 0x80000000;
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}
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if (mask & CPSR_Q)
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env->QF = ((val & CPSR_Q) != 0);
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if (mask & CPSR_T)
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env->thumb = ((val & CPSR_T) != 0);
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if (mask & CPSR_IT_0_1) {
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env->condexec_bits &= ~3;
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env->condexec_bits |= (val >> 25) & 3;
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}
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if (mask & CPSR_IT_2_7) {
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env->condexec_bits &= 3;
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env->condexec_bits |= (val >> 8) & 0xfc;
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}
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if (mask & CPSR_GE) {
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env->GE = (val >> 16) & 0xf;
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}
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if ((env->uncached_cpsr ^ val) & mask & CPSR_M) {
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switch_mode(env, val & CPSR_M);
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}
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mask &= ~CACHED_CPSR_BITS;
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env->uncached_cpsr = (env->uncached_cpsr & ~mask) | (val & mask);
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}
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#if defined(CONFIG_USER_ONLY)
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void do_interrupt (CPUState *env)
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{
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env->exception_index = -1;
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}
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/* Structure used to record exclusive memory locations. */
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typedef struct mmon_state {
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struct mmon_state *next;
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CPUARMState *cpu_env;
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uint32_t addr;
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} mmon_state;
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/* Chain of current locks. */
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static mmon_state* mmon_head = NULL;
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int cpu_arm_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
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int mmu_idx, int is_softmmu)
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{
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if (rw == 2) {
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env->exception_index = EXCP_PREFETCH_ABORT;
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env->cp15.c6_insn = address;
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} else {
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env->exception_index = EXCP_DATA_ABORT;
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env->cp15.c6_data = address;
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}
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return 1;
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}
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static void allocate_mmon_state(CPUState *env)
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{
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env->mmon_entry = malloc(sizeof (mmon_state));
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if (!env->mmon_entry)
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abort();
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memset (env->mmon_entry, 0, sizeof (mmon_state));
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env->mmon_entry->cpu_env = env;
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mmon_head = env->mmon_entry;
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}
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/* Flush any monitor locks for the specified address. */
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static void flush_mmon(uint32_t addr)
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{
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mmon_state *mon;
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for (mon = mmon_head; mon; mon = mon->next)
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{
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if (mon->addr != addr)
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continue;
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mon->addr = 0;
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break;
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}
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}
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/* Mark an address for exclusive access. */
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void helper_mark_exclusive(CPUState *env, uint32_t addr)
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{
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if (!env->mmon_entry)
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allocate_mmon_state(env);
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/* Clear any previous locks. */
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flush_mmon(addr);
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env->mmon_entry->addr = addr;
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}
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/* Test if an exclusive address is still exclusive. Returns zero
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if the address is still exclusive. */
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int helper_test_exclusive(CPUState *env, uint32_t addr)
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{
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int res;
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if (!env->mmon_entry)
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return 1;
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if (env->mmon_entry->addr == addr)
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res = 0;
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else
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res = 1;
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flush_mmon(addr);
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return res;
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}
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void helper_clrex(CPUState *env)
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{
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if (!(env->mmon_entry && env->mmon_entry->addr))
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return;
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flush_mmon(env->mmon_entry->addr);
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}
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target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
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{
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return addr;
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}
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/* These should probably raise undefined insn exceptions. */
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void helper_set_cp(CPUState *env, uint32_t insn, uint32_t val)
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{
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int op1 = (insn >> 8) & 0xf;
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cpu_abort(env, "cp%i insn %08x\n", op1, insn);
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return;
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}
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uint32_t helper_get_cp(CPUState *env, uint32_t insn)
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{
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int op1 = (insn >> 8) & 0xf;
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cpu_abort(env, "cp%i insn %08x\n", op1, insn);
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return 0;
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}
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void helper_set_cp15(CPUState *env, uint32_t insn, uint32_t val)
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{
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cpu_abort(env, "cp15 insn %08x\n", insn);
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}
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uint32_t helper_get_cp15(CPUState *env, uint32_t insn)
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{
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cpu_abort(env, "cp15 insn %08x\n", insn);
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return 0;
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}
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/* These should probably raise undefined insn exceptions. */
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void helper_v7m_msr(CPUState *env, int reg, uint32_t val)
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{
|
|
cpu_abort(env, "v7m_mrs %d\n", reg);
|
|
}
|
|
|
|
uint32_t helper_v7m_mrs(CPUState *env, int reg)
|
|
{
|
|
cpu_abort(env, "v7m_mrs %d\n", reg);
|
|
return 0;
|
|
}
|
|
|
|
void switch_mode(CPUState *env, int mode)
|
|
{
|
|
if (mode != ARM_CPU_MODE_USR)
|
|
cpu_abort(env, "Tried to switch out of user mode\n");
|
|
}
|
|
|
|
void helper_set_r13_banked(CPUState *env, int mode, uint32_t val)
|
|
{
|
|
cpu_abort(env, "banked r13 write\n");
|
|
}
|
|
|
|
uint32_t helper_get_r13_banked(CPUState *env, int mode)
|
|
{
|
|
cpu_abort(env, "banked r13 read\n");
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
|
|
extern int semihosting_enabled;
|
|
|
|
/* Map CPU modes onto saved register banks. */
|
|
static inline int bank_number (int mode)
|
|
{
|
|
switch (mode) {
|
|
case ARM_CPU_MODE_USR:
|
|
case ARM_CPU_MODE_SYS:
|
|
return 0;
|
|
case ARM_CPU_MODE_SVC:
|
|
return 1;
|
|
case ARM_CPU_MODE_ABT:
|
|
return 2;
|
|
case ARM_CPU_MODE_UND:
|
|
return 3;
|
|
case ARM_CPU_MODE_IRQ:
|
|
return 4;
|
|
case ARM_CPU_MODE_FIQ:
|
|
return 5;
|
|
}
|
|
cpu_abort(cpu_single_env, "Bad mode %x\n", mode);
|
|
return -1;
|
|
}
|
|
|
|
void switch_mode(CPUState *env, int mode)
|
|
{
|
|
int old_mode;
|
|
int i;
|
|
|
|
old_mode = env->uncached_cpsr & CPSR_M;
|
|
if (mode == old_mode)
|
|
return;
|
|
|
|
if (old_mode == ARM_CPU_MODE_FIQ) {
|
|
memcpy (env->fiq_regs, env->regs + 8, 5 * sizeof(uint32_t));
|
|
memcpy (env->regs + 8, env->usr_regs, 5 * sizeof(uint32_t));
|
|
} else if (mode == ARM_CPU_MODE_FIQ) {
|
|
memcpy (env->usr_regs, env->regs + 8, 5 * sizeof(uint32_t));
|
|
memcpy (env->regs + 8, env->fiq_regs, 5 * sizeof(uint32_t));
|
|
}
|
|
|
|
i = bank_number(old_mode);
|
|
env->banked_r13[i] = env->regs[13];
|
|
env->banked_r14[i] = env->regs[14];
|
|
env->banked_spsr[i] = env->spsr;
|
|
|
|
i = bank_number(mode);
|
|
env->regs[13] = env->banked_r13[i];
|
|
env->regs[14] = env->banked_r14[i];
|
|
env->spsr = env->banked_spsr[i];
|
|
}
|
|
|
|
static void v7m_push(CPUARMState *env, uint32_t val)
|
|
{
|
|
env->regs[13] -= 4;
|
|
stl_phys(env->regs[13], val);
|
|
}
|
|
|
|
static uint32_t v7m_pop(CPUARMState *env)
|
|
{
|
|
uint32_t val;
|
|
val = ldl_phys(env->regs[13]);
|
|
env->regs[13] += 4;
|
|
return val;
|
|
}
|
|
|
|
/* Switch to V7M main or process stack pointer. */
|
|
static void switch_v7m_sp(CPUARMState *env, int process)
|
|
{
|
|
uint32_t tmp;
|
|
if (env->v7m.current_sp != process) {
|
|
tmp = env->v7m.other_sp;
|
|
env->v7m.other_sp = env->regs[13];
|
|
env->regs[13] = tmp;
|
|
env->v7m.current_sp = process;
|
|
}
|
|
}
|
|
|
|
static void do_v7m_exception_exit(CPUARMState *env)
|
|
{
|
|
uint32_t type;
|
|
uint32_t xpsr;
|
|
|
|
type = env->regs[15];
|
|
if (env->v7m.exception != 0)
|
|
armv7m_nvic_complete_irq(env->v7m.nvic, env->v7m.exception);
|
|
|
|
/* Switch to the target stack. */
|
|
switch_v7m_sp(env, (type & 4) != 0);
|
|
/* Pop registers. */
|
|
env->regs[0] = v7m_pop(env);
|
|
env->regs[1] = v7m_pop(env);
|
|
env->regs[2] = v7m_pop(env);
|
|
env->regs[3] = v7m_pop(env);
|
|
env->regs[12] = v7m_pop(env);
|
|
env->regs[14] = v7m_pop(env);
|
|
env->regs[15] = v7m_pop(env);
|
|
xpsr = v7m_pop(env);
|
|
xpsr_write(env, xpsr, 0xfffffdff);
|
|
/* Undo stack alignment. */
|
|
if (xpsr & 0x200)
|
|
env->regs[13] |= 4;
|
|
/* ??? The exception return type specifies Thread/Handler mode. However
|
|
this is also implied by the xPSR value. Not sure what to do
|
|
if there is a mismatch. */
|
|
/* ??? Likewise for mismatches between the CONTROL register and the stack
|
|
pointer. */
|
|
}
|
|
|
|
void do_interrupt_v7m(CPUARMState *env)
|
|
{
|
|
uint32_t xpsr = xpsr_read(env);
|
|
uint32_t lr;
|
|
uint32_t addr;
|
|
|
|
lr = 0xfffffff1;
|
|
if (env->v7m.current_sp)
|
|
lr |= 4;
|
|
if (env->v7m.exception == 0)
|
|
lr |= 8;
|
|
|
|
/* For exceptions we just mark as pending on the NVIC, and let that
|
|
handle it. */
|
|
/* TODO: Need to escalate if the current priority is higher than the
|
|
one we're raising. */
|
|
switch (env->exception_index) {
|
|
case EXCP_UDEF:
|
|
armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_USAGE);
|
|
return;
|
|
case EXCP_SWI:
|
|
env->regs[15] += 2;
|
|
armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_SVC);
|
|
return;
|
|
case EXCP_PREFETCH_ABORT:
|
|
case EXCP_DATA_ABORT:
|
|
armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_MEM);
|
|
return;
|
|
case EXCP_BKPT:
|
|
if (semihosting_enabled) {
|
|
int nr;
|
|
nr = lduw_code(env->regs[15]) & 0xff;
|
|
if (nr == 0xab) {
|
|
env->regs[15] += 2;
|
|
env->regs[0] = do_arm_semihosting(env);
|
|
return;
|
|
}
|
|
}
|
|
armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_DEBUG);
|
|
return;
|
|
case EXCP_IRQ:
|
|
env->v7m.exception = armv7m_nvic_acknowledge_irq(env->v7m.nvic);
|
|
break;
|
|
case EXCP_EXCEPTION_EXIT:
|
|
do_v7m_exception_exit(env);
|
|
return;
|
|
default:
|
|
cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
|
|
return; /* Never happens. Keep compiler happy. */
|
|
}
|
|
|
|
/* Align stack pointer. */
|
|
/* ??? Should only do this if Configuration Control Register
|
|
STACKALIGN bit is set. */
|
|
if (env->regs[13] & 4) {
|
|
env->regs[13] += 4;
|
|
xpsr |= 0x200;
|
|
}
|
|
/* Switch to the hander mode. */
|
|
v7m_push(env, xpsr);
|
|
v7m_push(env, env->regs[15]);
|
|
v7m_push(env, env->regs[14]);
|
|
v7m_push(env, env->regs[12]);
|
|
v7m_push(env, env->regs[3]);
|
|
v7m_push(env, env->regs[2]);
|
|
v7m_push(env, env->regs[1]);
|
|
v7m_push(env, env->regs[0]);
|
|
switch_v7m_sp(env, 0);
|
|
env->uncached_cpsr &= ~CPSR_IT;
|
|
env->regs[14] = lr;
|
|
addr = ldl_phys(env->v7m.vecbase + env->v7m.exception * 4);
|
|
env->regs[15] = addr & 0xfffffffe;
|
|
env->thumb = addr & 1;
|
|
}
|
|
|
|
/* Handle a CPU exception. */
|
|
void do_interrupt(CPUARMState *env)
|
|
{
|
|
uint32_t addr;
|
|
uint32_t mask;
|
|
int new_mode;
|
|
uint32_t offset;
|
|
|
|
if (IS_M(env)) {
|
|
do_interrupt_v7m(env);
|
|
return;
|
|
}
|
|
/* TODO: Vectored interrupt controller. */
|
|
switch (env->exception_index) {
|
|
case EXCP_UDEF:
|
|
new_mode = ARM_CPU_MODE_UND;
|
|
addr = 0x04;
|
|
mask = CPSR_I;
|
|
if (env->thumb)
|
|
offset = 2;
|
|
else
|
|
offset = 4;
|
|
break;
|
|
case EXCP_SWI:
|
|
if (semihosting_enabled) {
|
|
/* Check for semihosting interrupt. */
|
|
if (env->thumb) {
|
|
mask = lduw_code(env->regs[15] - 2) & 0xff;
|
|
} else {
|
|
mask = ldl_code(env->regs[15] - 4) & 0xffffff;
|
|
}
|
|
/* Only intercept calls from privileged modes, to provide some
|
|
semblance of security. */
|
|
if (((mask == 0x123456 && !env->thumb)
|
|
|| (mask == 0xab && env->thumb))
|
|
&& (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) {
|
|
env->regs[0] = do_arm_semihosting(env);
|
|
return;
|
|
}
|
|
}
|
|
new_mode = ARM_CPU_MODE_SVC;
|
|
addr = 0x08;
|
|
mask = CPSR_I;
|
|
/* The PC already points to the next instructon. */
|
|
offset = 0;
|
|
break;
|
|
case EXCP_BKPT:
|
|
/* See if this is a semihosting syscall. */
|
|
if (env->thumb && semihosting_enabled) {
|
|
mask = lduw_code(env->regs[15]) & 0xff;
|
|
if (mask == 0xab
|
|
&& (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) {
|
|
env->regs[15] += 2;
|
|
env->regs[0] = do_arm_semihosting(env);
|
|
return;
|
|
}
|
|
}
|
|
/* Fall through to prefetch abort. */
|
|
case EXCP_PREFETCH_ABORT:
|
|
new_mode = ARM_CPU_MODE_ABT;
|
|
addr = 0x0c;
|
|
mask = CPSR_A | CPSR_I;
|
|
offset = 4;
|
|
break;
|
|
case EXCP_DATA_ABORT:
|
|
new_mode = ARM_CPU_MODE_ABT;
|
|
addr = 0x10;
|
|
mask = CPSR_A | CPSR_I;
|
|
offset = 8;
|
|
break;
|
|
case EXCP_IRQ:
|
|
new_mode = ARM_CPU_MODE_IRQ;
|
|
addr = 0x18;
|
|
/* Disable IRQ and imprecise data aborts. */
|
|
mask = CPSR_A | CPSR_I;
|
|
offset = 4;
|
|
break;
|
|
case EXCP_FIQ:
|
|
new_mode = ARM_CPU_MODE_FIQ;
|
|
addr = 0x1c;
|
|
/* Disable FIQ, IRQ and imprecise data aborts. */
|
|
mask = CPSR_A | CPSR_I | CPSR_F;
|
|
offset = 4;
|
|
break;
|
|
default:
|
|
cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
|
|
return; /* Never happens. Keep compiler happy. */
|
|
}
|
|
/* High vectors. */
|
|
if (env->cp15.c1_sys & (1 << 13)) {
|
|
addr += 0xffff0000;
|
|
}
|
|
switch_mode (env, new_mode);
|
|
env->spsr = cpsr_read(env);
|
|
/* Clear IT bits. */
|
|
env->condexec_bits = 0;
|
|
/* Switch to the new mode, and switch to Arm mode. */
|
|
/* ??? Thumb interrupt handlers not implemented. */
|
|
env->uncached_cpsr = (env->uncached_cpsr & ~CPSR_M) | new_mode;
|
|
env->uncached_cpsr |= mask;
|
|
env->thumb = 0;
|
|
env->regs[14] = env->regs[15] + offset;
|
|
env->regs[15] = addr;
|
|
env->interrupt_request |= CPU_INTERRUPT_EXITTB;
|
|
}
|
|
|
|
/* Check section/page access permissions.
|
|
Returns the page protection flags, or zero if the access is not
|
|
permitted. */
|
|
static inline int check_ap(CPUState *env, int ap, int domain, int access_type,
|
|
int is_user)
|
|
{
|
|
int prot_ro;
|
|
|
|
if (domain == 3)
|
|
return PAGE_READ | PAGE_WRITE;
|
|
|
|
if (access_type == 1)
|
|
prot_ro = 0;
|
|
else
|
|
prot_ro = PAGE_READ;
|
|
|
|
switch (ap) {
|
|
case 0:
|
|
if (access_type == 1)
|
|
return 0;
|
|
switch ((env->cp15.c1_sys >> 8) & 3) {
|
|
case 1:
|
|
return is_user ? 0 : PAGE_READ;
|
|
case 2:
|
|
return PAGE_READ;
|
|
default:
|
|
return 0;
|
|
}
|
|
case 1:
|
|
return is_user ? 0 : PAGE_READ | PAGE_WRITE;
|
|
case 2:
|
|
if (is_user)
|
|
return prot_ro;
|
|
else
|
|
return PAGE_READ | PAGE_WRITE;
|
|
case 3:
|
|
return PAGE_READ | PAGE_WRITE;
|
|
case 4: case 7: /* Reserved. */
|
|
return 0;
|
|
case 5:
|
|
return is_user ? 0 : prot_ro;
|
|
case 6:
|
|
return prot_ro;
|
|
default:
|
|
abort();
|
|
}
|
|
}
|
|
|
|
static int get_phys_addr_v5(CPUState *env, uint32_t address, int access_type,
|
|
int is_user, uint32_t *phys_ptr, int *prot)
|
|
{
|
|
int code;
|
|
uint32_t table;
|
|
uint32_t desc;
|
|
int type;
|
|
int ap;
|
|
int domain;
|
|
uint32_t phys_addr;
|
|
|
|
/* Pagetable walk. */
|
|
/* Lookup l1 descriptor. */
|
|
if (address & env->cp15.c2_mask)
|
|
table = env->cp15.c2_base1;
|
|
else
|
|
table = env->cp15.c2_base0;
|
|
table = (table & 0xffffc000) | ((address >> 18) & 0x3ffc);
|
|
desc = ldl_phys(table);
|
|
type = (desc & 3);
|
|
domain = (env->cp15.c3 >> ((desc >> 4) & 0x1e)) & 3;
|
|
if (type == 0) {
|
|
/* Secton translation fault. */
|
|
code = 5;
|
|
goto do_fault;
|
|
}
|
|
if (domain == 0 || domain == 2) {
|
|
if (type == 2)
|
|
code = 9; /* Section domain fault. */
|
|
else
|
|
code = 11; /* Page domain fault. */
|
|
goto do_fault;
|
|
}
|
|
if (type == 2) {
|
|
/* 1Mb section. */
|
|
phys_addr = (desc & 0xfff00000) | (address & 0x000fffff);
|
|
ap = (desc >> 10) & 3;
|
|
code = 13;
|
|
} else {
|
|
/* Lookup l2 entry. */
|
|
if (type == 1) {
|
|
/* Coarse pagetable. */
|
|
table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc);
|
|
} else {
|
|
/* Fine pagetable. */
|
|
table = (desc & 0xfffff000) | ((address >> 8) & 0xffc);
|
|
}
|
|
desc = ldl_phys(table);
|
|
switch (desc & 3) {
|
|
case 0: /* Page translation fault. */
|
|
code = 7;
|
|
goto do_fault;
|
|
case 1: /* 64k page. */
|
|
phys_addr = (desc & 0xffff0000) | (address & 0xffff);
|
|
ap = (desc >> (4 + ((address >> 13) & 6))) & 3;
|
|
break;
|
|
case 2: /* 4k page. */
|
|
phys_addr = (desc & 0xfffff000) | (address & 0xfff);
|
|
ap = (desc >> (4 + ((address >> 13) & 6))) & 3;
|
|
break;
|
|
case 3: /* 1k page. */
|
|
if (type == 1) {
|
|
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
|
phys_addr = (desc & 0xfffff000) | (address & 0xfff);
|
|
} else {
|
|
/* Page translation fault. */
|
|
code = 7;
|
|
goto do_fault;
|
|
}
|
|
} else {
|
|
phys_addr = (desc & 0xfffffc00) | (address & 0x3ff);
|
|
}
|
|
ap = (desc >> 4) & 3;
|
|
break;
|
|
default:
|
|
/* Never happens, but compiler isn't smart enough to tell. */
|
|
abort();
|
|
}
|
|
code = 15;
|
|
}
|
|
*prot = check_ap(env, ap, domain, access_type, is_user);
|
|
if (!*prot) {
|
|
/* Access permission fault. */
|
|
goto do_fault;
|
|
}
|
|
*phys_ptr = phys_addr;
|
|
return 0;
|
|
do_fault:
|
|
return code | (domain << 4);
|
|
}
|
|
|
|
static int get_phys_addr_v6(CPUState *env, uint32_t address, int access_type,
|
|
int is_user, uint32_t *phys_ptr, int *prot)
|
|
{
|
|
int code;
|
|
uint32_t table;
|
|
uint32_t desc;
|
|
uint32_t xn;
|
|
int type;
|
|
int ap;
|
|
int domain;
|
|
uint32_t phys_addr;
|
|
|
|
/* Pagetable walk. */
|
|
/* Lookup l1 descriptor. */
|
|
if (address & env->cp15.c2_mask)
|
|
table = env->cp15.c2_base1;
|
|
else
|
|
table = env->cp15.c2_base0;
|
|
table = (table & 0xffffc000) | ((address >> 18) & 0x3ffc);
|
|
desc = ldl_phys(table);
|
|
type = (desc & 3);
|
|
if (type == 0) {
|
|
/* Secton translation fault. */
|
|
code = 5;
|
|
domain = 0;
|
|
goto do_fault;
|
|
} else if (type == 2 && (desc & (1 << 18))) {
|
|
/* Supersection. */
|
|
domain = 0;
|
|
} else {
|
|
/* Section or page. */
|
|
domain = (desc >> 4) & 0x1e;
|
|
}
|
|
domain = (env->cp15.c3 >> domain) & 3;
|
|
if (domain == 0 || domain == 2) {
|
|
if (type == 2)
|
|
code = 9; /* Section domain fault. */
|
|
else
|
|
code = 11; /* Page domain fault. */
|
|
goto do_fault;
|
|
}
|
|
if (type == 2) {
|
|
if (desc & (1 << 18)) {
|
|
/* Supersection. */
|
|
phys_addr = (desc & 0xff000000) | (address & 0x00ffffff);
|
|
} else {
|
|
/* Section. */
|
|
phys_addr = (desc & 0xfff00000) | (address & 0x000fffff);
|
|
}
|
|
ap = ((desc >> 10) & 3) | ((desc >> 13) & 4);
|
|
xn = desc & (1 << 4);
|
|
code = 13;
|
|
} else {
|
|
/* Lookup l2 entry. */
|
|
table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc);
|
|
desc = ldl_phys(table);
|
|
ap = ((desc >> 4) & 3) | ((desc >> 7) & 4);
|
|
switch (desc & 3) {
|
|
case 0: /* Page translation fault. */
|
|
code = 7;
|
|
goto do_fault;
|
|
case 1: /* 64k page. */
|
|
phys_addr = (desc & 0xffff0000) | (address & 0xffff);
|
|
xn = desc & (1 << 15);
|
|
break;
|
|
case 2: case 3: /* 4k page. */
|
|
phys_addr = (desc & 0xfffff000) | (address & 0xfff);
|
|
xn = desc & 1;
|
|
break;
|
|
default:
|
|
/* Never happens, but compiler isn't smart enough to tell. */
|
|
abort();
|
|
}
|
|
code = 15;
|
|
}
|
|
if (xn && access_type == 2)
|
|
goto do_fault;
|
|
|
|
*prot = check_ap(env, ap, domain, access_type, is_user);
|
|
if (!*prot) {
|
|
/* Access permission fault. */
|
|
goto do_fault;
|
|
}
|
|
*phys_ptr = phys_addr;
|
|
return 0;
|
|
do_fault:
|
|
return code | (domain << 4);
|
|
}
|
|
|
|
static int get_phys_addr_mpu(CPUState *env, uint32_t address, int access_type,
|
|
int is_user, uint32_t *phys_ptr, int *prot)
|
|
{
|
|
int n;
|
|
uint32_t mask;
|
|
uint32_t base;
|
|
|
|
*phys_ptr = address;
|
|
for (n = 7; n >= 0; n--) {
|
|
base = env->cp15.c6_region[n];
|
|
if ((base & 1) == 0)
|
|
continue;
|
|
mask = 1 << ((base >> 1) & 0x1f);
|
|
/* Keep this shift separate from the above to avoid an
|
|
(undefined) << 32. */
|
|
mask = (mask << 1) - 1;
|
|
if (((base ^ address) & ~mask) == 0)
|
|
break;
|
|
}
|
|
if (n < 0)
|
|
return 2;
|
|
|
|
if (access_type == 2) {
|
|
mask = env->cp15.c5_insn;
|
|
} else {
|
|
mask = env->cp15.c5_data;
|
|
}
|
|
mask = (mask >> (n * 4)) & 0xf;
|
|
switch (mask) {
|
|
case 0:
|
|
return 1;
|
|
case 1:
|
|
if (is_user)
|
|
return 1;
|
|
*prot = PAGE_READ | PAGE_WRITE;
|
|
break;
|
|
case 2:
|
|
*prot = PAGE_READ;
|
|
if (!is_user)
|
|
*prot |= PAGE_WRITE;
|
|
break;
|
|
case 3:
|
|
*prot = PAGE_READ | PAGE_WRITE;
|
|
break;
|
|
case 5:
|
|
if (is_user)
|
|
return 1;
|
|
*prot = PAGE_READ;
|
|
break;
|
|
case 6:
|
|
*prot = PAGE_READ;
|
|
break;
|
|
default:
|
|
/* Bad permission. */
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static inline int get_phys_addr(CPUState *env, uint32_t address,
|
|
int access_type, int is_user,
|
|
uint32_t *phys_ptr, int *prot)
|
|
{
|
|
/* Fast Context Switch Extension. */
|
|
if (address < 0x02000000)
|
|
address += env->cp15.c13_fcse;
|
|
|
|
if ((env->cp15.c1_sys & 1) == 0) {
|
|
/* MMU/MPU disabled. */
|
|
*phys_ptr = address;
|
|
*prot = PAGE_READ | PAGE_WRITE;
|
|
return 0;
|
|
} else if (arm_feature(env, ARM_FEATURE_MPU)) {
|
|
return get_phys_addr_mpu(env, address, access_type, is_user, phys_ptr,
|
|
prot);
|
|
} else if (env->cp15.c1_sys & (1 << 23)) {
|
|
return get_phys_addr_v6(env, address, access_type, is_user, phys_ptr,
|
|
prot);
|
|
} else {
|
|
return get_phys_addr_v5(env, address, access_type, is_user, phys_ptr,
|
|
prot);
|
|
}
|
|
}
|
|
|
|
int cpu_arm_handle_mmu_fault (CPUState *env, target_ulong address,
|
|
int access_type, int mmu_idx, int is_softmmu)
|
|
{
|
|
uint32_t phys_addr;
|
|
int prot;
|
|
int ret, is_user;
|
|
|
|
is_user = mmu_idx == MMU_USER_IDX;
|
|
ret = get_phys_addr(env, address, access_type, is_user, &phys_addr, &prot);
|
|
if (ret == 0) {
|
|
/* Map a single [sub]page. */
|
|
phys_addr &= ~(uint32_t)0x3ff;
|
|
address &= ~(uint32_t)0x3ff;
|
|
return tlb_set_page (env, address, phys_addr, prot, mmu_idx,
|
|
is_softmmu);
|
|
}
|
|
|
|
if (access_type == 2) {
|
|
env->cp15.c5_insn = ret;
|
|
env->cp15.c6_insn = address;
|
|
env->exception_index = EXCP_PREFETCH_ABORT;
|
|
} else {
|
|
env->cp15.c5_data = ret;
|
|
if (access_type == 1 && arm_feature(env, ARM_FEATURE_V6))
|
|
env->cp15.c5_data |= (1 << 11);
|
|
env->cp15.c6_data = address;
|
|
env->exception_index = EXCP_DATA_ABORT;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
|
|
{
|
|
uint32_t phys_addr;
|
|
int prot;
|
|
int ret;
|
|
|
|
ret = get_phys_addr(env, addr, 0, 0, &phys_addr, &prot);
|
|
|
|
if (ret != 0)
|
|
return -1;
|
|
|
|
return phys_addr;
|
|
}
|
|
|
|
/* Not really implemented. Need to figure out a sane way of doing this.
|
|
Maybe add generic watchpoint support and use that. */
|
|
|
|
void helper_mark_exclusive(CPUState *env, uint32_t addr)
|
|
{
|
|
env->mmon_addr = addr;
|
|
}
|
|
|
|
int helper_test_exclusive(CPUState *env, uint32_t addr)
|
|
{
|
|
return (env->mmon_addr != addr);
|
|
}
|
|
|
|
void helper_clrex(CPUState *env)
|
|
{
|
|
env->mmon_addr = -1;
|
|
}
|
|
|
|
void helper_set_cp(CPUState *env, uint32_t insn, uint32_t val)
|
|
{
|
|
int cp_num = (insn >> 8) & 0xf;
|
|
int cp_info = (insn >> 5) & 7;
|
|
int src = (insn >> 16) & 0xf;
|
|
int operand = insn & 0xf;
|
|
|
|
if (env->cp[cp_num].cp_write)
|
|
env->cp[cp_num].cp_write(env->cp[cp_num].opaque,
|
|
cp_info, src, operand, val);
|
|
}
|
|
|
|
uint32_t helper_get_cp(CPUState *env, uint32_t insn)
|
|
{
|
|
int cp_num = (insn >> 8) & 0xf;
|
|
int cp_info = (insn >> 5) & 7;
|
|
int dest = (insn >> 16) & 0xf;
|
|
int operand = insn & 0xf;
|
|
|
|
if (env->cp[cp_num].cp_read)
|
|
return env->cp[cp_num].cp_read(env->cp[cp_num].opaque,
|
|
cp_info, dest, operand);
|
|
return 0;
|
|
}
|
|
|
|
/* Return basic MPU access permission bits. */
|
|
static uint32_t simple_mpu_ap_bits(uint32_t val)
|
|
{
|
|
uint32_t ret;
|
|
uint32_t mask;
|
|
int i;
|
|
ret = 0;
|
|
mask = 3;
|
|
for (i = 0; i < 16; i += 2) {
|
|
ret |= (val >> i) & mask;
|
|
mask <<= 2;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* Pad basic MPU access permission bits to extended format. */
|
|
static uint32_t extended_mpu_ap_bits(uint32_t val)
|
|
{
|
|
uint32_t ret;
|
|
uint32_t mask;
|
|
int i;
|
|
ret = 0;
|
|
mask = 3;
|
|
for (i = 0; i < 16; i += 2) {
|
|
ret |= (val & mask) << i;
|
|
mask <<= 2;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
void helper_set_cp15(CPUState *env, uint32_t insn, uint32_t val)
|
|
{
|
|
int op1;
|
|
int op2;
|
|
int crm;
|
|
|
|
op1 = (insn >> 21) & 7;
|
|
op2 = (insn >> 5) & 7;
|
|
crm = insn & 0xf;
|
|
switch ((insn >> 16) & 0xf) {
|
|
case 0:
|
|
if (((insn >> 21) & 7) == 2) {
|
|
/* ??? Select cache level. Ignore. */
|
|
return;
|
|
}
|
|
/* ID codes. */
|
|
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
|
break;
|
|
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
|
break;
|
|
goto bad_reg;
|
|
case 1: /* System configuration. */
|
|
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
|
op2 = 0;
|
|
switch (op2) {
|
|
case 0:
|
|
if (!arm_feature(env, ARM_FEATURE_XSCALE) || crm == 0)
|
|
env->cp15.c1_sys = val;
|
|
/* ??? Lots of these bits are not implemented. */
|
|
/* This may enable/disable the MMU, so do a TLB flush. */
|
|
tlb_flush(env, 1);
|
|
break;
|
|
case 1: /* Auxiliary cotrol register. */
|
|
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
|
env->cp15.c1_xscaleauxcr = val;
|
|
break;
|
|
}
|
|
/* Not implemented. */
|
|
break;
|
|
case 2:
|
|
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
|
goto bad_reg;
|
|
env->cp15.c1_coproc = val;
|
|
/* ??? Is this safe when called from within a TB? */
|
|
tb_flush(env);
|
|
break;
|
|
default:
|
|
goto bad_reg;
|
|
}
|
|
break;
|
|
case 2: /* MMU Page table control / MPU cache control. */
|
|
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
|
switch (op2) {
|
|
case 0:
|
|
env->cp15.c2_data = val;
|
|
break;
|
|
case 1:
|
|
env->cp15.c2_insn = val;
|
|
break;
|
|
default:
|
|
goto bad_reg;
|
|
}
|
|
} else {
|
|
switch (op2) {
|
|
case 0:
|
|
env->cp15.c2_base0 = val;
|
|
break;
|
|
case 1:
|
|
env->cp15.c2_base1 = val;
|
|
break;
|
|
case 2:
|
|
env->cp15.c2_mask = ~(((uint32_t)0xffffffffu) >> val);
|
|
break;
|
|
default:
|
|
goto bad_reg;
|
|
}
|
|
}
|
|
break;
|
|
case 3: /* MMU Domain access control / MPU write buffer control. */
|
|
env->cp15.c3 = val;
|
|
tlb_flush(env, 1); /* Flush TLB as domain not tracked in TLB */
|
|
break;
|
|
case 4: /* Reserved. */
|
|
goto bad_reg;
|
|
case 5: /* MMU Fault status / MPU access permission. */
|
|
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
|
op2 = 0;
|
|
switch (op2) {
|
|
case 0:
|
|
if (arm_feature(env, ARM_FEATURE_MPU))
|
|
val = extended_mpu_ap_bits(val);
|
|
env->cp15.c5_data = val;
|
|
break;
|
|
case 1:
|
|
if (arm_feature(env, ARM_FEATURE_MPU))
|
|
val = extended_mpu_ap_bits(val);
|
|
env->cp15.c5_insn = val;
|
|
break;
|
|
case 2:
|
|
if (!arm_feature(env, ARM_FEATURE_MPU))
|
|
goto bad_reg;
|
|
env->cp15.c5_data = val;
|
|
break;
|
|
case 3:
|
|
if (!arm_feature(env, ARM_FEATURE_MPU))
|
|
goto bad_reg;
|
|
env->cp15.c5_insn = val;
|
|
break;
|
|
default:
|
|
goto bad_reg;
|
|
}
|
|
break;
|
|
case 6: /* MMU Fault address / MPU base/size. */
|
|
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
|
if (crm >= 8)
|
|
goto bad_reg;
|
|
env->cp15.c6_region[crm] = val;
|
|
} else {
|
|
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
|
op2 = 0;
|
|
switch (op2) {
|
|
case 0:
|
|
env->cp15.c6_data = val;
|
|
break;
|
|
case 1: /* ??? This is WFAR on armv6 */
|
|
case 2:
|
|
env->cp15.c6_insn = val;
|
|
break;
|
|
default:
|
|
goto bad_reg;
|
|
}
|
|
}
|
|
break;
|
|
case 7: /* Cache control. */
|
|
env->cp15.c15_i_max = 0x000;
|
|
env->cp15.c15_i_min = 0xff0;
|
|
/* No cache, so nothing to do. */
|
|
/* ??? MPCore has VA to PA translation functions. */
|
|
break;
|
|
case 8: /* MMU TLB control. */
|
|
switch (op2) {
|
|
case 0: /* Invalidate all. */
|
|
tlb_flush(env, 0);
|
|
break;
|
|
case 1: /* Invalidate single TLB entry. */
|
|
#if 0
|
|
/* ??? This is wrong for large pages and sections. */
|
|
/* As an ugly hack to make linux work we always flush a 4K
|
|
pages. */
|
|
val &= 0xfffff000;
|
|
tlb_flush_page(env, val);
|
|
tlb_flush_page(env, val + 0x400);
|
|
tlb_flush_page(env, val + 0x800);
|
|
tlb_flush_page(env, val + 0xc00);
|
|
#else
|
|
tlb_flush(env, 1);
|
|
#endif
|
|
break;
|
|
case 2: /* Invalidate on ASID. */
|
|
tlb_flush(env, val == 0);
|
|
break;
|
|
case 3: /* Invalidate single entry on MVA. */
|
|
/* ??? This is like case 1, but ignores ASID. */
|
|
tlb_flush(env, 1);
|
|
break;
|
|
default:
|
|
goto bad_reg;
|
|
}
|
|
break;
|
|
case 9:
|
|
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
|
break;
|
|
switch (crm) {
|
|
case 0: /* Cache lockdown. */
|
|
switch (op1) {
|
|
case 0: /* L1 cache. */
|
|
switch (op2) {
|
|
case 0:
|
|
env->cp15.c9_data = val;
|
|
break;
|
|
case 1:
|
|
env->cp15.c9_insn = val;
|
|
break;
|
|
default:
|
|
goto bad_reg;
|
|
}
|
|
break;
|
|
case 1: /* L2 cache. */
|
|
/* Ignore writes to L2 lockdown/auxiliary registers. */
|
|
break;
|
|
default:
|
|
goto bad_reg;
|
|
}
|
|
break;
|
|
case 1: /* TCM memory region registers. */
|
|
/* Not implemented. */
|
|
goto bad_reg;
|
|
default:
|
|
goto bad_reg;
|
|
}
|
|
break;
|
|
case 10: /* MMU TLB lockdown. */
|
|
/* ??? TLB lockdown not implemented. */
|
|
break;
|
|
case 12: /* Reserved. */
|
|
goto bad_reg;
|
|
case 13: /* Process ID. */
|
|
switch (op2) {
|
|
case 0:
|
|
/* Unlike real hardware the qemu TLB uses virtual addresses,
|
|
not modified virtual addresses, so this causes a TLB flush.
|
|
*/
|
|
if (env->cp15.c13_fcse != val)
|
|
tlb_flush(env, 1);
|
|
env->cp15.c13_fcse = val;
|
|
break;
|
|
case 1:
|
|
/* This changes the ASID, so do a TLB flush. */
|
|
if (env->cp15.c13_context != val
|
|
&& !arm_feature(env, ARM_FEATURE_MPU))
|
|
tlb_flush(env, 0);
|
|
env->cp15.c13_context = val;
|
|
break;
|
|
case 2:
|
|
env->cp15.c13_tls1 = val;
|
|
break;
|
|
case 3:
|
|
env->cp15.c13_tls2 = val;
|
|
break;
|
|
case 4:
|
|
env->cp15.c13_tls3 = val;
|
|
break;
|
|
default:
|
|
goto bad_reg;
|
|
}
|
|
break;
|
|
case 14: /* Reserved. */
|
|
goto bad_reg;
|
|
case 15: /* Implementation specific. */
|
|
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
|
if (op2 == 0 && crm == 1) {
|
|
if (env->cp15.c15_cpar != (val & 0x3fff)) {
|
|
/* Changes cp0 to cp13 behavior, so needs a TB flush. */
|
|
tb_flush(env);
|
|
env->cp15.c15_cpar = val & 0x3fff;
|
|
}
|
|
break;
|
|
}
|
|
goto bad_reg;
|
|
}
|
|
if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
|
|
switch (crm) {
|
|
case 0:
|
|
break;
|
|
case 1: /* Set TI925T configuration. */
|
|
env->cp15.c15_ticonfig = val & 0xe7;
|
|
env->cp15.c0_cpuid = (val & (1 << 5)) ? /* OS_TYPE bit */
|
|
ARM_CPUID_TI915T : ARM_CPUID_TI925T;
|
|
break;
|
|
case 2: /* Set I_max. */
|
|
env->cp15.c15_i_max = val;
|
|
break;
|
|
case 3: /* Set I_min. */
|
|
env->cp15.c15_i_min = val;
|
|
break;
|
|
case 4: /* Set thread-ID. */
|
|
env->cp15.c15_threadid = val & 0xffff;
|
|
break;
|
|
case 8: /* Wait-for-interrupt (deprecated). */
|
|
cpu_interrupt(env, CPU_INTERRUPT_HALT);
|
|
break;
|
|
default:
|
|
goto bad_reg;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
return;
|
|
bad_reg:
|
|
/* ??? For debugging only. Should raise illegal instruction exception. */
|
|
cpu_abort(env, "Unimplemented cp15 register write (c%d, c%d, {%d, %d})\n",
|
|
(insn >> 16) & 0xf, crm, op1, op2);
|
|
}
|
|
|
|
uint32_t helper_get_cp15(CPUState *env, uint32_t insn)
|
|
{
|
|
int op1;
|
|
int op2;
|
|
int crm;
|
|
|
|
op1 = (insn >> 21) & 7;
|
|
op2 = (insn >> 5) & 7;
|
|
crm = insn & 0xf;
|
|
switch ((insn >> 16) & 0xf) {
|
|
case 0: /* ID codes. */
|
|
switch (op1) {
|
|
case 0:
|
|
switch (crm) {
|
|
case 0:
|
|
switch (op2) {
|
|
case 0: /* Device ID. */
|
|
return env->cp15.c0_cpuid;
|
|
case 1: /* Cache Type. */
|
|
return env->cp15.c0_cachetype;
|
|
case 2: /* TCM status. */
|
|
return 0;
|
|
case 3: /* TLB type register. */
|
|
return 0; /* No lockable TLB entries. */
|
|
case 5: /* CPU ID */
|
|
return env->cpu_index;
|
|
default:
|
|
goto bad_reg;
|
|
}
|
|
case 1:
|
|
if (!arm_feature(env, ARM_FEATURE_V6))
|
|
goto bad_reg;
|
|
return env->cp15.c0_c1[op2];
|
|
case 2:
|
|
if (!arm_feature(env, ARM_FEATURE_V6))
|
|
goto bad_reg;
|
|
return env->cp15.c0_c2[op2];
|
|
case 3: case 4: case 5: case 6: case 7:
|
|
return 0;
|
|
default:
|
|
goto bad_reg;
|
|
}
|
|
case 1:
|
|
/* These registers aren't documented on arm11 cores. However
|
|
Linux looks at them anyway. */
|
|
if (!arm_feature(env, ARM_FEATURE_V6))
|
|
goto bad_reg;
|
|
if (crm != 0)
|
|
goto bad_reg;
|
|
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
|
goto bad_reg;
|
|
return 0;
|
|
default:
|
|
goto bad_reg;
|
|
}
|
|
case 1: /* System configuration. */
|
|
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
|
op2 = 0;
|
|
switch (op2) {
|
|
case 0: /* Control register. */
|
|
return env->cp15.c1_sys;
|
|
case 1: /* Auxiliary control register. */
|
|
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
|
return env->cp15.c1_xscaleauxcr;
|
|
if (!arm_feature(env, ARM_FEATURE_AUXCR))
|
|
goto bad_reg;
|
|
switch (ARM_CPUID(env)) {
|
|
case ARM_CPUID_ARM1026:
|
|
return 1;
|
|
case ARM_CPUID_ARM1136:
|
|
return 7;
|
|
case ARM_CPUID_ARM11MPCORE:
|
|
return 1;
|
|
case ARM_CPUID_CORTEXA8:
|
|
return 0;
|
|
default:
|
|
goto bad_reg;
|
|
}
|
|
case 2: /* Coprocessor access register. */
|
|
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
|
goto bad_reg;
|
|
return env->cp15.c1_coproc;
|
|
default:
|
|
goto bad_reg;
|
|
}
|
|
case 2: /* MMU Page table control / MPU cache control. */
|
|
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
|
switch (op2) {
|
|
case 0:
|
|
return env->cp15.c2_data;
|
|
break;
|
|
case 1:
|
|
return env->cp15.c2_insn;
|
|
break;
|
|
default:
|
|
goto bad_reg;
|
|
}
|
|
} else {
|
|
switch (op2) {
|
|
case 0:
|
|
return env->cp15.c2_base0;
|
|
case 1:
|
|
return env->cp15.c2_base1;
|
|
case 2:
|
|
{
|
|
int n;
|
|
uint32_t mask;
|
|
n = 0;
|
|
mask = env->cp15.c2_mask;
|
|
while (mask) {
|
|
n++;
|
|
mask <<= 1;
|
|
}
|
|
return n;
|
|
}
|
|
default:
|
|
goto bad_reg;
|
|
}
|
|
}
|
|
case 3: /* MMU Domain access control / MPU write buffer control. */
|
|
return env->cp15.c3;
|
|
case 4: /* Reserved. */
|
|
goto bad_reg;
|
|
case 5: /* MMU Fault status / MPU access permission. */
|
|
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
|
op2 = 0;
|
|
switch (op2) {
|
|
case 0:
|
|
if (arm_feature(env, ARM_FEATURE_MPU))
|
|
return simple_mpu_ap_bits(env->cp15.c5_data);
|
|
return env->cp15.c5_data;
|
|
case 1:
|
|
if (arm_feature(env, ARM_FEATURE_MPU))
|
|
return simple_mpu_ap_bits(env->cp15.c5_data);
|
|
return env->cp15.c5_insn;
|
|
case 2:
|
|
if (!arm_feature(env, ARM_FEATURE_MPU))
|
|
goto bad_reg;
|
|
return env->cp15.c5_data;
|
|
case 3:
|
|
if (!arm_feature(env, ARM_FEATURE_MPU))
|
|
goto bad_reg;
|
|
return env->cp15.c5_insn;
|
|
default:
|
|
goto bad_reg;
|
|
}
|
|
case 6: /* MMU Fault address. */
|
|
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
|
if (crm >= 8)
|
|
goto bad_reg;
|
|
return env->cp15.c6_region[crm];
|
|
} else {
|
|
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
|
op2 = 0;
|
|
switch (op2) {
|
|
case 0:
|
|
return env->cp15.c6_data;
|
|
case 1:
|
|
if (arm_feature(env, ARM_FEATURE_V6)) {
|
|
/* Watchpoint Fault Adrress. */
|
|
return 0; /* Not implemented. */
|
|
} else {
|
|
/* Instruction Fault Adrress. */
|
|
/* Arm9 doesn't have an IFAR, but implementing it anyway
|
|
shouldn't do any harm. */
|
|
return env->cp15.c6_insn;
|
|
}
|
|
case 2:
|
|
if (arm_feature(env, ARM_FEATURE_V6)) {
|
|
/* Instruction Fault Adrress. */
|
|
return env->cp15.c6_insn;
|
|
} else {
|
|
goto bad_reg;
|
|
}
|
|
default:
|
|
goto bad_reg;
|
|
}
|
|
}
|
|
case 7: /* Cache control. */
|
|
/* ??? This is for test, clean and invaidate operations that set the
|
|
Z flag. We can't represent N = Z = 1, so it also clears
|
|
the N flag. Oh well. */
|
|
env->NZF = 0;
|
|
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;
|
|
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;
|
|
}
|
|
case 10: /* MMU TLB lockdown. */
|
|
/* ??? TLB lockdown not implemented. */
|
|
return 0;
|
|
case 11: /* TCM DMA control. */
|
|
case 12: /* Reserved. */
|
|
goto bad_reg;
|
|
case 13: /* Process ID. */
|
|
switch (op2) {
|
|
case 0:
|
|
return env->cp15.c13_fcse;
|
|
case 1:
|
|
return env->cp15.c13_context;
|
|
case 2:
|
|
return env->cp15.c13_tls1;
|
|
case 3:
|
|
return env->cp15.c13_tls2;
|
|
case 4:
|
|
return env->cp15.c13_tls3;
|
|
default:
|
|
goto bad_reg;
|
|
}
|
|
case 14: /* Reserved. */
|
|
goto bad_reg;
|
|
case 15: /* Implementation specific. */
|
|
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
|
if (op2 == 0 && crm == 1)
|
|
return env->cp15.c15_cpar;
|
|
|
|
goto bad_reg;
|
|
}
|
|
if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
|
|
switch (crm) {
|
|
case 0:
|
|
return 0;
|
|
case 1: /* Read TI925T configuration. */
|
|
return env->cp15.c15_ticonfig;
|
|
case 2: /* Read I_max. */
|
|
return env->cp15.c15_i_max;
|
|
case 3: /* Read I_min. */
|
|
return env->cp15.c15_i_min;
|
|
case 4: /* Read thread-ID. */
|
|
return env->cp15.c15_threadid;
|
|
case 8: /* TI925T_status */
|
|
return 0;
|
|
}
|
|
goto bad_reg;
|
|
}
|
|
return 0;
|
|
}
|
|
bad_reg:
|
|
/* ??? For debugging only. Should raise illegal instruction exception. */
|
|
cpu_abort(env, "Unimplemented cp15 register read (c%d, c%d, {%d, %d})\n",
|
|
(insn >> 16) & 0xf, crm, op1, op2);
|
|
return 0;
|
|
}
|
|
|
|
void helper_set_r13_banked(CPUState *env, int mode, uint32_t val)
|
|
{
|
|
env->banked_r13[bank_number(mode)] = val;
|
|
}
|
|
|
|
uint32_t helper_get_r13_banked(CPUState *env, int mode)
|
|
{
|
|
return env->banked_r13[bank_number(mode)];
|
|
}
|
|
|
|
uint32_t helper_v7m_mrs(CPUState *env, int reg)
|
|
{
|
|
switch (reg) {
|
|
case 0: /* APSR */
|
|
return xpsr_read(env) & 0xf8000000;
|
|
case 1: /* IAPSR */
|
|
return xpsr_read(env) & 0xf80001ff;
|
|
case 2: /* EAPSR */
|
|
return xpsr_read(env) & 0xff00fc00;
|
|
case 3: /* xPSR */
|
|
return xpsr_read(env) & 0xff00fdff;
|
|
case 5: /* IPSR */
|
|
return xpsr_read(env) & 0x000001ff;
|
|
case 6: /* EPSR */
|
|
return xpsr_read(env) & 0x0700fc00;
|
|
case 7: /* IEPSR */
|
|
return xpsr_read(env) & 0x0700edff;
|
|
case 8: /* MSP */
|
|
return env->v7m.current_sp ? env->v7m.other_sp : env->regs[13];
|
|
case 9: /* PSP */
|
|
return env->v7m.current_sp ? env->regs[13] : env->v7m.other_sp;
|
|
case 16: /* PRIMASK */
|
|
return (env->uncached_cpsr & CPSR_I) != 0;
|
|
case 17: /* FAULTMASK */
|
|
return (env->uncached_cpsr & CPSR_F) != 0;
|
|
case 18: /* BASEPRI */
|
|
case 19: /* BASEPRI_MAX */
|
|
return env->v7m.basepri;
|
|
case 20: /* CONTROL */
|
|
return env->v7m.control;
|
|
default:
|
|
/* ??? For debugging only. */
|
|
cpu_abort(env, "Unimplemented system register read (%d)\n", reg);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
void helper_v7m_msr(CPUState *env, int reg, uint32_t val)
|
|
{
|
|
switch (reg) {
|
|
case 0: /* APSR */
|
|
xpsr_write(env, val, 0xf8000000);
|
|
break;
|
|
case 1: /* IAPSR */
|
|
xpsr_write(env, val, 0xf8000000);
|
|
break;
|
|
case 2: /* EAPSR */
|
|
xpsr_write(env, val, 0xfe00fc00);
|
|
break;
|
|
case 3: /* xPSR */
|
|
xpsr_write(env, val, 0xfe00fc00);
|
|
break;
|
|
case 5: /* IPSR */
|
|
/* IPSR bits are readonly. */
|
|
break;
|
|
case 6: /* EPSR */
|
|
xpsr_write(env, val, 0x0600fc00);
|
|
break;
|
|
case 7: /* IEPSR */
|
|
xpsr_write(env, val, 0x0600fc00);
|
|
break;
|
|
case 8: /* MSP */
|
|
if (env->v7m.current_sp)
|
|
env->v7m.other_sp = val;
|
|
else
|
|
env->regs[13] = val;
|
|
break;
|
|
case 9: /* PSP */
|
|
if (env->v7m.current_sp)
|
|
env->regs[13] = val;
|
|
else
|
|
env->v7m.other_sp = val;
|
|
break;
|
|
case 16: /* PRIMASK */
|
|
if (val & 1)
|
|
env->uncached_cpsr |= CPSR_I;
|
|
else
|
|
env->uncached_cpsr &= ~CPSR_I;
|
|
break;
|
|
case 17: /* FAULTMASK */
|
|
if (val & 1)
|
|
env->uncached_cpsr |= CPSR_F;
|
|
else
|
|
env->uncached_cpsr &= ~CPSR_F;
|
|
break;
|
|
case 18: /* BASEPRI */
|
|
env->v7m.basepri = val & 0xff;
|
|
break;
|
|
case 19: /* BASEPRI_MAX */
|
|
val &= 0xff;
|
|
if (val != 0 && (val < env->v7m.basepri || env->v7m.basepri == 0))
|
|
env->v7m.basepri = val;
|
|
break;
|
|
case 20: /* CONTROL */
|
|
env->v7m.control = val & 3;
|
|
switch_v7m_sp(env, (val & 2) != 0);
|
|
break;
|
|
default:
|
|
/* ??? For debugging only. */
|
|
cpu_abort(env, "Unimplemented system register write (%d)\n", reg);
|
|
return;
|
|
}
|
|
}
|
|
|
|
void cpu_arm_set_cp_io(CPUARMState *env, int cpnum,
|
|
ARMReadCPFunc *cp_read, ARMWriteCPFunc *cp_write,
|
|
void *opaque)
|
|
{
|
|
if (cpnum < 0 || cpnum > 14) {
|
|
cpu_abort(env, "Bad coprocessor number: %i\n", cpnum);
|
|
return;
|
|
}
|
|
|
|
env->cp[cpnum].cp_read = cp_read;
|
|
env->cp[cpnum].cp_write = cp_write;
|
|
env->cp[cpnum].opaque = opaque;
|
|
}
|
|
|
|
#endif
|