2 * QEMU RISC-V Boot Helper
4 * Copyright (c) 2017 SiFive, Inc.
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms and conditions of the GNU General Public License,
9 * version 2 or later, as published by the Free Software Foundation.
11 * This program is distributed in the hope it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * You should have received a copy of the GNU General Public License along with
17 * this program. If not, see <http://www.gnu.org/licenses/>.
20 #include "qemu/osdep.h"
21 #include "qemu/units.h"
22 #include "qemu/error-report.h"
23 #include "exec/cpu-defs.h"
24 #include "hw/loader.h"
25 #include "hw/riscv/boot.h"
26 #include "hw/boards.h"
29 #if defined(TARGET_RISCV32)
30 # define KERNEL_BOOT_ADDRESS 0x80400000
32 # define KERNEL_BOOT_ADDRESS 0x80200000
35 target_ulong riscv_load_firmware(const char *firmware_filename,
36 hwaddr firmware_load_addr)
38 uint64_t firmware_entry, firmware_start, firmware_end;
40 if (load_elf(firmware_filename, NULL, NULL, NULL, &firmware_entry,
41 &firmware_start, &firmware_end, 0, EM_RISCV, 1, 0) > 0) {
42 return firmware_entry;
45 if (load_image_targphys_as(firmware_filename, firmware_load_addr,
46 ram_size, NULL) > 0) {
47 return firmware_load_addr;
50 error_report("could not load firmware '%s'", firmware_filename);
54 target_ulong riscv_load_kernel(const char *kernel_filename)
56 uint64_t kernel_entry, kernel_high;
58 if (load_elf(kernel_filename, NULL, NULL, NULL,
59 &kernel_entry, NULL, &kernel_high, 0, EM_RISCV, 1, 0) > 0) {
63 if (load_uimage_as(kernel_filename, &kernel_entry, NULL, NULL,
64 NULL, NULL, NULL) > 0) {
68 if (load_image_targphys_as(kernel_filename, KERNEL_BOOT_ADDRESS,
69 ram_size, NULL) > 0) {
70 return KERNEL_BOOT_ADDRESS;
73 error_report("could not load kernel '%s'", kernel_filename);
77 hwaddr riscv_load_initrd(const char *filename, uint64_t mem_size,
78 uint64_t kernel_entry, hwaddr *start)
83 * We want to put the initrd far enough into RAM that when the
84 * kernel is uncompressed it will not clobber the initrd. However
85 * on boards without much RAM we must ensure that we still leave
86 * enough room for a decent sized initrd, and on boards with large
87 * amounts of RAM we must avoid the initrd being so far up in RAM
88 * that it is outside lowmem and inaccessible to the kernel.
89 * So for boards with less than 256MB of RAM we put the initrd
90 * halfway into RAM, and for boards with 256MB of RAM or more we put
91 * the initrd at 128MB.
93 *start = kernel_entry + MIN(mem_size / 2, 128 * MiB);
95 size = load_ramdisk(filename, *start, mem_size - *start);
97 size = load_image_targphys(filename, *start, mem_size - *start);
99 error_report("could not load ramdisk '%s'", filename);
104 return *start + size;