66b1205bc5
Currently, the fdt is copied to the ROM after the reset vector. The firmware has to copy it to DRAM. Instead of this, directly copy the device tree to a pre-computed dram address. The device tree load address should be as far as possible from kernel and initrd images. That's why it is kept at the end of the DRAM or 4GB whichever is lesser. 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: <20200701183949.398134-3-atish.patra@wdc.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
44 lines
1.8 KiB
C
44 lines
1.8 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,
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uint32_t fdt_load_addr, void *fdt);
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#endif /* RISCV_BOOT_H */
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