static void aspeed_scu_realize(DeviceState *dev, Error **errp)
{
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
AspeedSCUState *s = ASPEED_SCU(dev);
if (!is_supported_silicon_rev(s->silicon_rev)) {
error_setg(errp, "Unknown silicon revision: 0x%" PRIx32,
s->silicon_rev);
return;
}
memory_region_init_io(&s->iomem, OBJECT(s), &aspeed_scu_ops, s,
TYPE_ASPEED_SCU, SCU_IO_REGION_SIZE);
sysbus_init_mmio(sbd, &s->iomem);
}
static void aspeed_scu_reset(DeviceState *dev)
{
AspeedSCUState *s = ASPEED_SCU(dev);
const uint32_t *reset;
switch (s->silicon_rev) {
case AST2400_A0_SILICON_REV:
reset = ast2400_a0_resets;
break;
default:
g_assert_not_reached();
}
memcpy(s->regs, reset, sizeof(s->regs));
s->regs[SILICON_REV] = s->silicon_rev;
s->regs[HW_STRAP1] = s->hw_strap1;
s->regs[HW_STRAP2] = s->hw_strap2;
}
static void aspeed_scu_write(void *opaque, hwaddr offset, uint64_t data,
unsigned size)
{
AspeedSCUState *s = ASPEED_SCU(opaque);
int reg = TO_REG(offset);
if (reg >= ARRAY_SIZE(s->regs)) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n",
__func__, offset);
return;
}
if (reg > PROT_KEY && reg < CPU2_BASE_SEG1 &&
!s->regs[PROT_KEY]) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: SCU is locked!\n", __func__);
return;
}
trace_aspeed_scu_write(offset, size, data);
switch (reg) {
case PROT_KEY:
s->regs[reg] = (data == ASPEED_SCU_PROT_KEY) ? 1 : 0;
return;
case FREQ_CNTR_EVAL:
case VGA_SCRATCH1 ... VGA_SCRATCH8:
case RNG_DATA:
case SILICON_REV:
case FREE_CNTR4:
case FREE_CNTR4_EXT:
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Write to read-only offset 0x%" HWADDR_PRIx "\n",
__func__, offset);
return;
}
s->regs[reg] = data;
}
static uint64_t aspeed_scu_read(void *opaque, hwaddr offset, unsigned size)
{
AspeedSCUState *s = ASPEED_SCU(opaque);
int reg = TO_REG(offset);
if (reg >= ARRAY_SIZE(s->regs)) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Out-of-bounds read at offset 0x%" HWADDR_PRIx "\n",
__func__, offset);
return 0;
}
switch (reg) {
case WAKEUP_EN:
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Read of write-only offset 0x%" HWADDR_PRIx "\n",
__func__, offset);
break;
}
return s->regs[reg];
}
