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| author | Anup Patel <anup.patel@wdc.com> | 2020-10-22 11:02:24 +0530 |
|---|---|---|
| committer | Alistair Francis <alistair.francis@wdc.com> | 2020-11-03 07:17:23 -0800 |
| commit | d5c90cf3f648c544af7a75a8908b58722062dc57 (patch) | |
| tree | 734c88b38e93fc673344c00b3524c1b66eb67bf7 /hw/riscv/sifive_u.c | |
| parent | 83851c7c60c90e9fb6a23ff48076387a77bc33cd (diff) | |
| download | qemu-d5c90cf3f648c544af7a75a8908b58722062dc57.zip qemu-d5c90cf3f648c544af7a75a8908b58722062dc57.tar.gz qemu-d5c90cf3f648c544af7a75a8908b58722062dc57.tar.bz2 | |
hw/riscv: sifive_u: Allow passing custom DTB
Extend sifive_u machine to allow passing custom DTB using "-dtb"
command-line parameter. This will help users pass modified DTB
or Linux SiFive DTB to sifive_u machine.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20201022053225.2596110-1-anup.patel@wdc.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Diffstat (limited to 'hw/riscv/sifive_u.c')
| -rw-r--r-- | hw/riscv/sifive_u.c | 28 |
1 files changed, 20 insertions, 8 deletions
diff --git a/hw/riscv/sifive_u.c b/hw/riscv/sifive_u.c index b2472c6..2f19a9c 100644 --- a/hw/riscv/sifive_u.c +++ b/hw/riscv/sifive_u.c @@ -100,14 +100,25 @@ static void create_fdt(SiFiveUState *s, const struct MemmapEntry *memmap, int cpu; uint32_t *cells; char *nodename; + const char *dtb_filename; char ethclk_names[] = "pclk\0hclk"; uint32_t plic_phandle, prci_phandle, gpio_phandle, phandle = 1; uint32_t hfclk_phandle, rtcclk_phandle, phy_phandle; - fdt = s->fdt = create_device_tree(&s->fdt_size); - if (!fdt) { - error_report("create_device_tree() failed"); - exit(1); + dtb_filename = qemu_opt_get(qemu_get_machine_opts(), "dtb"); + if (dtb_filename) { + fdt = s->fdt = load_device_tree(dtb_filename, &s->fdt_size); + if (!fdt) { + error_report("load_device_tree() failed"); + exit(1); + } + goto update_bootargs; + } else { + fdt = s->fdt = create_device_tree(&s->fdt_size); + if (!fdt) { + error_report("create_device_tree() failed"); + exit(1); + } } qemu_fdt_setprop_string(fdt, "/", "model", "SiFive HiFive Unleashed A00"); @@ -390,13 +401,14 @@ static void create_fdt(SiFiveUState *s, const struct MemmapEntry *memmap, qemu_fdt_add_subnode(fdt, "/chosen"); qemu_fdt_setprop_string(fdt, "/chosen", "stdout-path", nodename); - if (cmdline) { - qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", cmdline); - } - qemu_fdt_setprop_string(fdt, "/aliases", "serial0", nodename); g_free(nodename); + +update_bootargs: + if (cmdline) { + qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", cmdline); + } } static void sifive_u_machine_reset(void *opaque, int n, int level) |