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>

diff --git a/hw/riscv/sifive_u.c b/hw/riscv/sifive_u.c
index 6dac6629106804c35b5eec380e0053bba659b590..b04be42167208472520d72fca795cd2862c96882 100644 (file)
--- a/hw/riscv/sifive_u.c
+++ b/hw/riscv/sifive_u.c
@@ -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,

diff --git a/include/hw/riscv/sifive_u.h b/include/hw/riscv/sifive_u.h
index b1399a90a6b73e44e49f26453954900306f66c0f..f6d10ebfb6b7c2feb781be4d95881139ac868ed1 100644 (file)
--- a/include/hw/riscv/sifive_u.h
+++ b/include/hw/riscv/sifive_u.h
@@ -63,6 +63,7 @@ typedef struct SiFiveUState {
     int fdt_size;
 
     bool start_in_flash;
+    uint32_t msel;
     uint32_t serial;
 } SiFiveUState;