motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-02 23:33:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

riscv: Add opensbi firmware dynamic support

Browse source 
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>
This commit is contained in:
Atish Patra 2020-07-01 11:39:48 -07:00 • committed by Alistair Francis
parent 66b1205bc5
commit dc144fe13d
6 changed files with 134 additions and 16 deletions
Download patch file Download diff file Expand all files Collapse all files

5
include/hw/riscv/boot.h
View file

@ -37,7 +37,10 @@ hwaddr riscv_load_initrd(const char *filename, uint64_t mem_size,
uint64_t kernel_entry, hwaddr *start);
uint32_t riscv_load_fdt(hwaddr dram_start, uint64_t dram_size, void *fdt);
void riscv_setup_rom_reset_vec(hwaddr saddr, hwaddr rom_base,
hwaddr rom_size,
hwaddr rom_size, uint64_t kernel_entry,
uint32_t fdt_load_addr, void *fdt);
void riscv_rom_copy_firmware_info(hwaddr rom_base, hwaddr rom_size,
uint32_t reset_vec_size,
uint64_t kernel_entry);
#endif /* RISCV_BOOT_H */