riscv: sifive_u: Add support for loading initrd
Add support for loading initrd with "-initrd <filename>" to the sifive_u machine. This lets us boot into Linux without disk drive. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
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@ -67,7 +67,7 @@ static const struct MemmapEntry {
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#define GEM_REVISION 0x10070109
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static void create_fdt(SiFiveUState *s, const struct MemmapEntry *memmap,
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static void *create_fdt(SiFiveUState *s, const struct MemmapEntry *memmap,
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uint64_t mem_size, const char *cmdline)
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{
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void *fdt;
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@ -244,11 +244,14 @@ static void create_fdt(SiFiveUState *s, const struct MemmapEntry *memmap,
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qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", cmdline);
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}
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g_free(nodename);
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return fdt;
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}
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static void riscv_sifive_u_init(MachineState *machine)
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{
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const struct MemmapEntry *memmap = sifive_u_memmap;
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void *fdt;
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SiFiveUState *s = g_new0(SiFiveUState, 1);
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MemoryRegion *system_memory = get_system_memory();
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@ -269,13 +272,24 @@ static void riscv_sifive_u_init(MachineState *machine)
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main_mem);
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/* create device tree */
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create_fdt(s, memmap, machine->ram_size, machine->kernel_cmdline);
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fdt = create_fdt(s, memmap, machine->ram_size, machine->kernel_cmdline);
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riscv_find_and_load_firmware(machine, BIOS_FILENAME,
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memmap[SIFIVE_U_DRAM].base);
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if (machine->kernel_filename) {
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riscv_load_kernel(machine->kernel_filename);
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uint64_t kernel_entry = riscv_load_kernel(machine->kernel_filename);
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if (machine->initrd_filename) {
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hwaddr start;
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hwaddr end = riscv_load_initrd(machine->initrd_filename,
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machine->ram_size, kernel_entry,
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&start);
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qemu_fdt_setprop_cell(fdt, "/chosen",
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"linux,initrd-start", start);
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qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
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end);
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}
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}
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/* reset vector */
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