diff options
| -rw-r--r-- | hw/arm/aspeed_ast27x0.c | 87 | ||||
| -rw-r--r-- | include/hw/arm/aspeed_soc.h | 2 |
2 files changed, 88 insertions, 1 deletions
diff --git a/hw/arm/aspeed_ast27x0.c b/hw/arm/aspeed_ast27x0.c index 29e7507..b6876b4 100644 --- a/hw/arm/aspeed_ast27x0.c +++ b/hw/arm/aspeed_ast27x0.c @@ -20,6 +20,7 @@ #include "sysemu/sysemu.h" #include "hw/intc/arm_gicv3.h" #include "qapi/qmp/qlist.h" +#include "qemu/log.h" static const hwaddr aspeed_soc_ast2700_memmap[] = { [ASPEED_DEV_SPI_BOOT] = 0x400000000, @@ -191,6 +192,90 @@ static qemu_irq aspeed_soc_ast2700_get_irq(AspeedSoCState *s, int dev) return qdev_get_gpio_in(DEVICE(&a->gic), sc->irqmap[dev]); } +static uint64_t aspeed_ram_capacity_read(void *opaque, hwaddr addr, + unsigned int size) +{ + qemu_log_mask(LOG_GUEST_ERROR, + "%s: DRAM read out of ram size, addr:0x%" PRIx64 "\n", + __func__, addr); + return 0; +} + +static void aspeed_ram_capacity_write(void *opaque, hwaddr addr, uint64_t data, + unsigned int size) +{ + AspeedSoCState *s = ASPEED_SOC(opaque); + ram_addr_t ram_size; + MemTxResult result; + + ram_size = object_property_get_uint(OBJECT(&s->sdmc), "ram-size", + &error_abort); + + /* + * Emulate ddr capacity hardware behavior. + * If writes the data to the address which is beyond the ram size, + * it would write the data to the "address % ram_size". + */ + result = address_space_write(&s->dram_as, addr % ram_size, + MEMTXATTRS_UNSPECIFIED, &data, 4); + if (result != MEMTX_OK) { + qemu_log_mask(LOG_GUEST_ERROR, + "%s: DRAM write failed, addr:0x%" HWADDR_PRIx + ", data :0x%" PRIx64 "\n", + __func__, addr % ram_size, data); + } +} + +static const MemoryRegionOps aspeed_ram_capacity_ops = { + .read = aspeed_ram_capacity_read, + .write = aspeed_ram_capacity_write, + .endianness = DEVICE_LITTLE_ENDIAN, + .valid = { + .min_access_size = 1, + .max_access_size = 8, + }, +}; + +/* + * SDMC should be realized first to get correct RAM size and max size + * values + */ +static bool aspeed_soc_ast2700_dram_init(DeviceState *dev, Error **errp) +{ + ram_addr_t ram_size, max_ram_size; + Aspeed27x0SoCState *a = ASPEED27X0_SOC(dev); + AspeedSoCState *s = ASPEED_SOC(dev); + AspeedSoCClass *sc = ASPEED_SOC_GET_CLASS(s); + + ram_size = object_property_get_uint(OBJECT(&s->sdmc), "ram-size", + &error_abort); + max_ram_size = object_property_get_uint(OBJECT(&s->sdmc), "max-ram-size", + &error_abort); + + memory_region_init(&s->dram_container, OBJECT(s), "ram-container", + ram_size); + memory_region_add_subregion(&s->dram_container, 0, s->dram_mr); + address_space_init(&s->dram_as, s->dram_mr, "dram"); + + /* + * Add a memory region beyond the RAM region to emulate + * ddr capacity hardware behavior. + */ + if (ram_size < max_ram_size) { + memory_region_init_io(&a->dram_empty, OBJECT(s), + &aspeed_ram_capacity_ops, s, + "ram-empty", max_ram_size - ram_size); + + memory_region_add_subregion(s->memory, + sc->memmap[ASPEED_DEV_SDRAM] + ram_size, + &a->dram_empty); + } + + memory_region_add_subregion(s->memory, + sc->memmap[ASPEED_DEV_SDRAM], &s->dram_container); + return true; +} + static void aspeed_soc_ast2700_init(Object *obj) { Aspeed27x0SoCState *a = ASPEED27X0_SOC(obj); @@ -461,7 +546,7 @@ static void aspeed_soc_ast2700_realize(DeviceState *dev, Error **errp) sc->memmap[ASPEED_DEV_SDMC]); /* RAM */ - if (!aspeed_soc_dram_init(s, errp)) { + if (!aspeed_soc_ast2700_dram_init(dev, errp)) { return; } diff --git a/include/hw/arm/aspeed_soc.h b/include/hw/arm/aspeed_soc.h index caef0d1..849ba37 100644 --- a/include/hw/arm/aspeed_soc.h +++ b/include/hw/arm/aspeed_soc.h @@ -59,6 +59,7 @@ struct AspeedSoCState { MemoryRegion sram; MemoryRegion spi_boot_container; MemoryRegion spi_boot; + AddressSpace dram_as; AspeedRtcState rtc; AspeedTimerCtrlState timerctrl; AspeedI2CState i2c; @@ -129,6 +130,7 @@ struct Aspeed27x0SoCState { ARMCPU cpu[ASPEED_CPUS_NUM]; AspeedINTCState intc; GICv3State gic; + MemoryRegion dram_empty; }; #define TYPE_ASPEED27X0_SOC "aspeed27x0-soc" |