mirror of
https://github.com/Motorhead1991/qemu.git
synced 2025-08-02 15:23:53 -06:00
bc2c015353
A common trend in other archs is to calculate the fdt address, which is usually straightforward, and then calling a function that loads the fdt/dtb by using that address. riscv_load_fdt() is doing a bit too much in comparison. It's calculating the fdt address via an elaborated heuristic to put the FDT at the bottom of DRAM, and "bottom of DRAM" will vary across boards and configurations, then it's actually loading the fdt, and finally it's returning the fdt address used to the caller. Reduce the existing complexity of riscv_load_fdt() by splitting its code into a new function, riscv_compute_fdt_addr(), that will take care of all fdt address logic. riscv_load_fdt() can then be a simple function that just loads a fdt at the given fdt address. We're also taken the opportunity to clarify the intentions and assumptions made by these functions. riscv_load_fdt() is now receiving a hwaddr as fdt_addr because there is no restriction of having to load the fdt in higher addresses that doesn't fit in an uint32_t. Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> Message-Id: <20230201171212.1219375-3-dbarboza@ventanamicro.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
65 lines
2.9 KiB
C
65 lines
2.9 KiB
C
/*
|
|
* QEMU RISC-V Boot Helper
|
|
*
|
|
* Copyright (c) 2017 SiFive, Inc.
|
|
* Copyright (c) 2019 Alistair Francis <alistair.francis@wdc.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2 or later, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef RISCV_BOOT_H
|
|
#define RISCV_BOOT_H
|
|
|
|
#include "exec/cpu-defs.h"
|
|
#include "hw/loader.h"
|
|
#include "hw/riscv/riscv_hart.h"
|
|
|
|
#define RISCV32_BIOS_BIN "opensbi-riscv32-generic-fw_dynamic.bin"
|
|
#define RISCV64_BIOS_BIN "opensbi-riscv64-generic-fw_dynamic.bin"
|
|
|
|
bool riscv_is_32bit(RISCVHartArrayState *harts);
|
|
|
|
char *riscv_plic_hart_config_string(int hart_count);
|
|
|
|
target_ulong riscv_calc_kernel_start_addr(RISCVHartArrayState *harts,
|
|
target_ulong firmware_end_addr);
|
|
target_ulong riscv_find_and_load_firmware(MachineState *machine,
|
|
const char *default_machine_firmware,
|
|
hwaddr firmware_load_addr,
|
|
symbol_fn_t sym_cb);
|
|
const char *riscv_default_firmware_name(RISCVHartArrayState *harts);
|
|
char *riscv_find_firmware(const char *firmware_filename,
|
|
const char *default_machine_firmware);
|
|
target_ulong riscv_load_firmware(const char *firmware_filename,
|
|
hwaddr firmware_load_addr,
|
|
symbol_fn_t sym_cb);
|
|
target_ulong riscv_load_kernel(MachineState *machine,
|
|
target_ulong firmware_end_addr,
|
|
symbol_fn_t sym_cb);
|
|
void riscv_load_initrd(MachineState *machine, uint64_t kernel_entry);
|
|
uint64_t riscv_compute_fdt_addr(hwaddr dram_start, uint64_t dram_size,
|
|
void *fdt);
|
|
void riscv_load_fdt(hwaddr fdt_addr, void *fdt);
|
|
void riscv_setup_rom_reset_vec(MachineState *machine, RISCVHartArrayState *harts,
|
|
hwaddr saddr,
|
|
hwaddr rom_base, hwaddr rom_size,
|
|
uint64_t kernel_entry,
|
|
uint64_t fdt_load_addr);
|
|
void riscv_rom_copy_firmware_info(MachineState *machine, hwaddr rom_base,
|
|
hwaddr rom_size,
|
|
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 */
|