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hw/riscv: virt: Enable booting S-mode firmware from pflash

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To boot S-mode firmware payload like EDK2 from persistent
flash storage, qemu needs to pass the flash address as the
next_addr in fw_dynamic_info to the opensbi.

When both -kernel and -pflash options are provided in command line,
the kernel (and initrd if -initrd) will be copied to fw_cfg table.
The S-mode FW will load the kernel/initrd from fw_cfg table.

If only pflash is given but not -kernel, then it is the job of
of the S-mode firmware to locate and load the kernel.

In either case, update the kernel_entry with the flash address
so that the opensbi can jump to the entry point of the S-mode
firmware.

Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20221004092351.18209-4-sunilvl@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Sunil V L 2022-10-04 14:53:51 +05:30 • committed by Alistair Francis
parent 90e26984ee
commit a5b0249dfe
3 changed files with 47 additions and 1 deletions
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1
include/hw/riscv/boot.h
View file

@ -57,5 +57,6 @@ void riscv_rom_copy_firmware_info(MachineState *machine, hwaddr rom_base,
uint32_t reset_vec_size,
uint64_t kernel_entry);
void riscv_setup_direct_kernel(hwaddr kernel_addr, hwaddr fdt_addr);
void riscv_setup_firmware_boot(MachineState *machine);
#endif /* RISCV_BOOT_H */