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

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>
master
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;