diff options
| author | Atish Patra <atish.patra@wdc.com> | 2020-07-01 11:39:48 -0700 |
|---|---|---|
| committer | Alistair Francis <alistair.francis@wdc.com> | 2020-07-13 17:25:37 -0700 |
| commit | dc144fe13d336caac2f03b57f1df738e84f984ec (patch) | |
| tree | 5376152bbe9d1416c435af13cf5795bce7450223 /hw/riscv/spike.c | |
| parent | 66b1205bc5ab8bb3f5e12fa4155bbeb56e6724e9 (diff) | |
riscv: Add opensbi firmware dynamic support
OpenSBI is the default firmware in Qemu and has various firmware loading
options. Currently, qemu loader uses fw_jump which has a compile time
pre-defined address where fdt & kernel image must reside. This puts a
constraint on image size of the Linux kernel depending on the fdt location
and available memory. However, fw_dynamic allows the loader to specify
the next stage location (i.e. Linux kernel/U-Boot) in memory and other
configurable boot options available in OpenSBI.
Add support for OpenSBI dynamic firmware loading support. This doesn't
break existing setup and fw_jump will continue to work as it is. Any
other firmware will continue to work without any issues as long as it
doesn't expect anything specific from loader in "a2" register.
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Bin Meng <bin.meng@windriver.com>
Tested-by: Bin Meng <bin.meng@windriver.com>
Message-Id: <20200701183949.398134-4-atish.patra@wdc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Diffstat (limited to 'hw/riscv/spike.c')
| -rw-r--r-- | hw/riscv/spike.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/hw/riscv/spike.c b/hw/riscv/spike.c index 13fa0455e3..b17d96aec7 100644 --- a/hw/riscv/spike.c +++ b/hw/riscv/spike.c @@ -164,6 +164,7 @@ static void spike_board_init(MachineState *machine) MemoryRegion *mask_rom = g_new(MemoryRegion, 1); unsigned int smp_cpus = machine->smp.cpus; uint32_t fdt_load_addr; + uint64_t kernel_entry; /* Initialize SOC */ object_initialize_child(OBJECT(machine), "soc", &s->soc, @@ -194,8 +195,8 @@ static void spike_board_init(MachineState *machine) htif_symbol_callback); if (machine->kernel_filename) { - uint64_t kernel_entry = riscv_load_kernel(machine->kernel_filename, - htif_symbol_callback); + kernel_entry = riscv_load_kernel(machine->kernel_filename, + htif_symbol_callback); if (machine->initrd_filename) { hwaddr start; @@ -207,6 +208,12 @@ static void spike_board_init(MachineState *machine) qemu_fdt_setprop_cell(s->fdt, "/chosen", "linux,initrd-end", end); } + } else { + /* + * If dynamic firmware is used, it doesn't know where is the next mode + * if kernel argument is not set. + */ + kernel_entry = 0; } /* Compute the fdt load address in dram */ @@ -214,7 +221,7 @@ static void spike_board_init(MachineState *machine) machine->ram_size, s->fdt); /* load the reset vector */ riscv_setup_rom_reset_vec(memmap[SPIKE_DRAM].base, memmap[SPIKE_MROM].base, - memmap[SPIKE_MROM].size, + memmap[SPIKE_MROM].size, kernel_entry, fdt_load_addr, s->fdt); /* initialize HTIF using symbols found in load_kernel */ |