From: Bin Meng <bin.meng@windriver.com>
On SiFive FU540 SoC, the value stored at physical address 0x1000
stores the MSEL pin state that is used to control the next boot
location that ROM codes jump to.
Add a new property msel to sifive_u machine for this.
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 1591625864-31494-12-git-send-email-bmeng.cn@gmail.com
Message-Id: <1591625864-31494-12-git-send-email-bmeng.cn@gmail.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
include/hw/riscv/sifive_u.h | 1 +
hw/riscv/sifive_u.c | 7 +++++++
2 files changed, 8 insertions(+)
diff --git a/include/hw/riscv/sifive_u.h b/include/hw/riscv/sifive_u.h
index b1399a90a6..f6d10ebfb6 100644
@@ -63,6 +63,7 @@ typedef struct SiFiveUState {
int fdt_size;
bool start_in_flash;
+ uint32_t msel;
uint32_t serial;
} SiFiveUState;
diff --git a/hw/riscv/sifive_u.c b/hw/riscv/sifive_u.c
index 6dac662910..b04be42167 100644
@@ -504,6 +504,13 @@ static void sifive_u_machine_instance_init(Object *obj)
"Set on to tell QEMU's ROM to jump to "
"flash. Otherwise QEMU will jump to DRAM");
+ s->msel = 0;
+ object_property_add(obj, "msel", "uint32",
+ sifive_u_machine_get_uint32_prop,
+ sifive_u_machine_set_uint32_prop, NULL, &s->msel);
+ object_property_set_description(obj, "msel",
+ "Mode Select (MSEL[3:0]) pin state");
+
s->serial = OTP_SERIAL;
object_property_add(obj, "serial", "uint32",
sifive_u_machine_get_uint32_prop,
--
2.27.0