aspeed: Introduce a 'boot-emmc' machine option
The default behavior of some Aspeed machines is to boot from the eMMC
device, like the rainier-bmc. Others like ast2600-evb could also boot
from eMMC if the HW strapping boot-from-eMMC bit was set. Add a
property to set or unset this bit. This is useful to test boot images.
For now, only activate this property on the ast2600-evb and rainier-bmc
machines for which eMMC images are available or can be built.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Andrew Jeffery <andrew@codeconstruct.com.au>
Tested-by: Andrew Jeffery <andrew@codeconstruct.com.au>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
diff --git a/docs/system/arm/aspeed.rst b/docs/system/arm/aspeed.rst
index cd9559e..6733ffd 100644
--- a/docs/system/arm/aspeed.rst
+++ b/docs/system/arm/aspeed.rst
@@ -123,6 +123,8 @@
Options specific to Aspeed machines are :
+ * ``boot-emmc`` to set or unset boot from eMMC (AST2600).
+
* ``execute-in-place`` which emulates the boot from the CE0 flash
device by using the FMC controller to load the instructions, and
not simply from RAM. This takes a little longer.
diff --git a/hw/arm/aspeed.c b/hw/arm/aspeed.c
index 9939559..5cdef87 100644
--- a/hw/arm/aspeed.c
+++ b/hw/arm/aspeed.c
@@ -1178,6 +1178,34 @@
mc->valid_cpu_types = sc->valid_cpu_types;
}
+static bool aspeed_machine_ast2600_get_boot_from_emmc(Object *obj, Error **errp)
+{
+ AspeedMachineState *bmc = ASPEED_MACHINE(obj);
+
+ return !!(bmc->hw_strap1 & SCU_AST2600_HW_STRAP_BOOT_SRC_EMMC);
+}
+
+static void aspeed_machine_ast2600_set_boot_from_emmc(Object *obj, bool value,
+ Error **errp)
+{
+ AspeedMachineState *bmc = ASPEED_MACHINE(obj);
+
+ if (value) {
+ bmc->hw_strap1 |= SCU_AST2600_HW_STRAP_BOOT_SRC_EMMC;
+ } else {
+ bmc->hw_strap1 &= ~SCU_AST2600_HW_STRAP_BOOT_SRC_EMMC;
+ }
+}
+
+static void aspeed_machine_ast2600_class_emmc_init(ObjectClass *oc)
+{
+ object_class_property_add_bool(oc, "boot-emmc",
+ aspeed_machine_ast2600_get_boot_from_emmc,
+ aspeed_machine_ast2600_set_boot_from_emmc);
+ object_class_property_set_description(oc, "boot-emmc",
+ "Set or unset boot from EMMC");
+}
+
static void aspeed_machine_class_init(ObjectClass *oc, void *data)
{
MachineClass *mc = MACHINE_CLASS(oc);
@@ -1377,6 +1405,7 @@
amc->i2c_init = ast2600_evb_i2c_init;
mc->default_ram_size = 1 * GiB;
aspeed_machine_class_init_cpus_defaults(mc);
+ aspeed_machine_ast2600_class_emmc_init(oc);
};
static void aspeed_machine_tacoma_class_init(ObjectClass *oc, void *data)
@@ -1449,6 +1478,7 @@
amc->i2c_init = rainier_bmc_i2c_init;
mc->default_ram_size = 1 * GiB;
aspeed_machine_class_init_cpus_defaults(mc);
+ aspeed_machine_ast2600_class_emmc_init(oc);
};
#define FUJI_BMC_RAM_SIZE ASPEED_RAM_SIZE(2 * GiB)
