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[PATCH v1 4/6] riscv/sifive_u: Add the start-in-flash property
From: |
Alistair Francis |
Subject: |
[PATCH v1 4/6] riscv/sifive_u: Add the start-in-flash property |
Date: |
Thu, 19 Sep 2019 15:25:03 -0700 |
Add a property that when set to true QEMU will jump from the ROM code to
the start of flash memory instead of DRAM which is the default
behaviour.
Signed-off-by: Alistair Francis <address@hidden>
---
hw/riscv/sifive_u.c | 27 +++++++++++++++++++++++++++
include/hw/riscv/sifive_u.h | 2 ++
2 files changed, 29 insertions(+)
diff --git a/hw/riscv/sifive_u.c b/hw/riscv/sifive_u.c
index c3949fb316..b7cd3631cd 100644
--- a/hw/riscv/sifive_u.c
+++ b/hw/riscv/sifive_u.c
@@ -373,6 +373,10 @@ static void riscv_sifive_u_init(MachineState *machine)
/* dtb: */
};
+ if (s->start_in_flash) {
+ reset_vec[6] = memmap[SIFIVE_U_FLASH0].base; /* start: .dword
FLASH0_BASE */
+ }
+
/* copy in the reset vector in little_endian byte order */
for (i = 0; i < sizeof(reset_vec) >> 2; i++) {
reset_vec[i] = cpu_to_le32(reset_vec[i]);
@@ -544,8 +548,31 @@ static void riscv_sifive_u_soc_realize(DeviceState *dev,
Error **errp)
memmap[SIFIVE_U_GEM_MGMT].base, memmap[SIFIVE_U_GEM_MGMT].size);
}
+static bool virt_get_start_in_flash(Object *obj, Error **errp)
+{
+ SiFiveUState *s = RISCV_U_MACHINE(obj);
+
+ return s->start_in_flash;
+}
+
+static void virt_set_start_in_flash(Object *obj, bool value, Error **errp)
+{
+ SiFiveUState *s = RISCV_U_MACHINE(obj);
+
+ s->start_in_flash = value;
+}
+
static void riscv_sifive_u_machine_instance_init(Object *obj)
{
+ SiFiveUState *s = RISCV_U_MACHINE(obj);
+
+ s->start_in_flash = false;
+ object_property_add_bool(obj, "start-in-flash", virt_get_start_in_flash,
+ virt_set_start_in_flash, NULL);
+ object_property_set_description(obj, "start-in-flash",
+ "Set on to tell QEMU's ROM to jump to " \
+ "flash. Otherwise QEMU will jump to DRAM",
+ NULL);
}
diff --git a/include/hw/riscv/sifive_u.h b/include/hw/riscv/sifive_u.h
index a921079fbe..2656b43c58 100644
--- a/include/hw/riscv/sifive_u.h
+++ b/include/hw/riscv/sifive_u.h
@@ -57,6 +57,8 @@ typedef struct SiFiveUState {
void *fdt;
int fdt_size;
+
+ bool start_in_flash;
} SiFiveUState;
enum {
--
2.23.0
[PATCH v1 6/6] riscv/virt: Jump to pflash if specified, Alistair Francis, 2019/09/19
[PATCH v1 5/6] riscv/virt: Add the PFlash CFI01 device, Alistair Francis, 2019/09/19