From: Anup Patel <anup.patel@wdc.com>
To: Peter Maydell <peter.maydell@linaro.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Alistair Francis <Alistair.Francis@wdc.com>,
Sagar Karandikar <sagark@eecs.berkeley.edu>
Cc: Atish Patra <atish.patra@wdc.com>,
Anup Patel <anup.patel@wdc.com>,
qemu-riscv@nongnu.org, qemu-devel@nongnu.org,
Anup Patel <anup@brainfault.org>
Subject: [PATCH 1/2] hw/riscv: sifive_u: Allow passing custom DTB
Date: Thu, 22 Oct 2020 11:02:24 +0530 [thread overview]
Message-ID: <20201022053225.2596110-1-anup.patel@wdc.com> (raw)
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>
---
hw/riscv/sifive_u.c | 28 ++++++++++++++++++++--------
1 file changed, 20 insertions(+), 8 deletions(-)
diff --git a/hw/riscv/sifive_u.c b/hw/riscv/sifive_u.c
index 6ad975d692..554e38abf0 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)
--
2.25.1
next reply other threads:[~2020-10-22 5:34 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-22 5:32 Anup Patel [this message]
2020-10-22 5:32 ` [PATCH 2/2] hw/riscv: virt: Allow passing custom DTB Anup Patel
2020-10-23 23:33 ` Alistair Francis
2020-10-23 23:32 ` [PATCH 1/2] hw/riscv: sifive_u: " Alistair Francis
2021-03-24 13:41 ` Bin Meng
2021-03-26 13:29 ` Bin Meng
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