Exemple #1
0
uint32_t glue(address_space_ldub, SUFFIX)(ARG1_DECL,
    hwaddr addr, MemTxAttrs attrs, MemTxResult *result)
{
    uint8_t *ptr;
    uint64_t val;
    MemoryRegion *mr;
    hwaddr l = 1;
    hwaddr addr1;
    MemTxResult r;
    bool release_lock = false;

    RCU_READ_LOCK();
    mr = TRANSLATE(addr, &addr1, &l, false);
    if (!IS_DIRECT(mr, false)) {
        release_lock |= prepare_mmio_access(mr);

        /* I/O case */
        r = memory_region_dispatch_read(mr, addr1, &val, 1, attrs);
    } else {
        /* RAM case */
        ptr = MAP_RAM(mr, addr1);
        val = ldub_p(ptr);
        r = MEMTX_OK;
    }
    if (result) {
        *result = r;
    }
    if (release_lock) {
        qemu_mutex_unlock_iothread();
    }
    RCU_READ_UNLOCK();
    return val;
}
Exemple #2
0
/* warning: addr must be aligned */
static inline uint32_t glue(address_space_lduw_internal, SUFFIX)(ARG1_DECL,
    hwaddr addr, MemTxAttrs attrs, MemTxResult *result,
    enum device_endian endian)
{
    uint8_t *ptr;
    uint64_t val;
    MemoryRegion *mr;
    hwaddr l = 2;
    hwaddr addr1;
    MemTxResult r;
    bool release_lock = false;

    RCU_READ_LOCK();
    mr = TRANSLATE(addr, &addr1, &l, false);
    if (l < 2 || !IS_DIRECT(mr, false)) {
        release_lock |= prepare_mmio_access(mr);

        /* I/O case */
        r = memory_region_dispatch_read(mr, addr1, &val, 2, attrs);
#if defined(TARGET_WORDS_BIGENDIAN)
        if (endian == DEVICE_LITTLE_ENDIAN) {
            val = bswap16(val);
        }
#else
        if (endian == DEVICE_BIG_ENDIAN) {
            val = bswap16(val);
        }
#endif
    } else {
        /* RAM case */
        ptr = MAP_RAM(mr, addr1);
        switch (endian) {
        case DEVICE_LITTLE_ENDIAN:
            val = lduw_le_p(ptr);
            break;
        case DEVICE_BIG_ENDIAN:
            val = lduw_be_p(ptr);
            break;
        default:
            val = lduw_p(ptr);
            break;
        }
        r = MEMTX_OK;
    }
    if (result) {
        *result = r;
    }
    if (release_lock) {
        qemu_mutex_unlock_iothread();
    }
    RCU_READ_UNLOCK();
    return val;
}
Exemple #3
0
static uint64_t io_readx(CPUArchState *env, CPUIOTLBEntry *iotlbentry,
                         int mmu_idx,
                         target_ulong addr, uintptr_t retaddr,
                         bool recheck, MMUAccessType access_type, int size)
{
    CPUState *cpu = ENV_GET_CPU(env);
    hwaddr mr_offset;
    MemoryRegionSection *section;
    MemoryRegion *mr;
    uint64_t val;
    bool locked = false;
    MemTxResult r;

    if (recheck) {
        /*
         * This is a TLB_RECHECK access, where the MMU protection
         * covers a smaller range than a target page, and we must
         * repeat the MMU check here. This tlb_fill() call might
         * longjump out if this access should cause a guest exception.
         */
        CPUTLBEntry *entry;
        target_ulong tlb_addr;

        tlb_fill(cpu, addr, size, MMU_DATA_LOAD, mmu_idx, retaddr);

        entry = tlb_entry(env, mmu_idx, addr);
        tlb_addr = entry->addr_read;
        if (!(tlb_addr & ~(TARGET_PAGE_MASK | TLB_RECHECK))) {
            /* RAM access */
            uintptr_t haddr = addr + entry->addend;

            return ldn_p((void *)haddr, size);
        }
        /* Fall through for handling IO accesses */
    }

    section = iotlb_to_section(cpu, iotlbentry->addr, iotlbentry->attrs);
    mr = section->mr;
    mr_offset = (iotlbentry->addr & TARGET_PAGE_MASK) + addr;
    cpu->mem_io_pc = retaddr;
    if (mr != &io_mem_rom && mr != &io_mem_notdirty && !cpu->can_do_io) {
        cpu_io_recompile(cpu, retaddr);
    }

    cpu->mem_io_vaddr = addr;
    cpu->mem_io_access_type = access_type;

    if (mr->global_locking && !qemu_mutex_iothread_locked()) {
        qemu_mutex_lock_iothread();
        locked = true;
    }
    r = memory_region_dispatch_read(mr, mr_offset,
                                    &val, size, iotlbentry->attrs);
    if (r != MEMTX_OK) {
        hwaddr physaddr = mr_offset +
            section->offset_within_address_space -
            section->offset_within_region;

        cpu_transaction_failed(cpu, physaddr, addr, size, access_type,
                               mmu_idx, iotlbentry->attrs, r, retaddr);
    }
    if (locked) {
        qemu_mutex_unlock_iothread();
    }

    return val;
}