2011-10-11 0:48:10

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2011-10-11 0:48:10

    goldfish_device_init(goldfish_pic, 0xff010000, 0x7f0000, 10, 22);


    设备总线

    goldfish_device_bus_init(0xff001000, 1);


    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);
    }
}

从虚拟地址到物理地址

static uint32_t get_level1_table_address(CPUState *env, uint32_t address)
{
uint32_t table;

    if (address & env->cp15.c2_mask)
        table = env->cp15.c2_base1 & 0xffffc000;
    else
        table = env->cp15.c2_base0 & env->cp15.c2_base_mask;

table |= (address >> 18) & 0x3ffc;
return table;
}

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