dc144fe13d
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>
47 lines
2.0 KiB
C
47 lines
2.0 KiB
C
/*
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* QEMU RISC-V Boot Helper
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*
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* Copyright (c) 2017 SiFive, Inc.
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* Copyright (c) 2019 Alistair Francis <alistair.francis@wdc.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2 or later, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef RISCV_BOOT_H
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#define RISCV_BOOT_H
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#include "exec/cpu-defs.h"
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#include "hw/loader.h"
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void riscv_find_and_load_firmware(MachineState *machine,
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const char *default_machine_firmware,
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hwaddr firmware_load_addr,
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symbol_fn_t sym_cb);
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char *riscv_find_firmware(const char *firmware_filename);
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target_ulong riscv_load_firmware(const char *firmware_filename,
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hwaddr firmware_load_addr,
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symbol_fn_t sym_cb);
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target_ulong riscv_load_kernel(const char *kernel_filename,
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symbol_fn_t sym_cb);
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hwaddr riscv_load_initrd(const char *filename, uint64_t mem_size,
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uint64_t kernel_entry, hwaddr *start);
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uint32_t riscv_load_fdt(hwaddr dram_start, uint64_t dram_size, void *fdt);
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void riscv_setup_rom_reset_vec(hwaddr saddr, hwaddr rom_base,
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hwaddr rom_size, uint64_t kernel_entry,
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uint32_t fdt_load_addr, void *fdt);
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void riscv_rom_copy_firmware_info(hwaddr rom_base, hwaddr rom_size,
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uint32_t reset_vec_size,
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uint64_t kernel_entry);
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#endif /* RISCV_BOOT_H */
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