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hw/riscv: sifive_u: Add a new property msel for MSEL pin state

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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>
This commit is contained in:
Bin Meng 2020-06-08 07:17:40 -07:00 committed by Alistair Francis
parent 3e9667cdaa
commit cfa32630d9
2 changed files with 8 additions and 0 deletions
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7
hw/riscv/sifive_u.c
View File

@ -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,

1
include/hw/riscv/sifive_u.h
View File

@ -63,6 +63,7 @@ typedef struct SiFiveUState {
int fdt_size;
bool start_in_flash;
uint32_t msel;
uint32_t serial;
} SiFiveUState;