mirror of https://gitee.com/openkylin/qemu.git
70 lines
2.3 KiB
C
70 lines
2.3 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/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "qemu/osdep.h"
|
||
|
|
#include "qemu/units.h"
|
||
|
|
#include "qemu/error-report.h"
|
||
|
|
#include "exec/cpu-defs.h"
|
||
|
|
#include "hw/loader.h"
|
||
|
|
#include "hw/riscv/boot.h"
|
||
|
|
#include "elf.h"
|
||
|
|
|
||
|
|
target_ulong riscv_load_kernel(const char *kernel_filename)
|
||
|
|
{
|
||
|
|
uint64_t kernel_entry, kernel_high;
|
||
|
|
|
||
|
|
if (load_elf(kernel_filename, NULL, NULL, NULL,
|
||
|
|
&kernel_entry, NULL, &kernel_high, 0, EM_RISCV, 1, 0) < 0) {
|
||
|
|
error_report("could not load kernel '%s'", kernel_filename);
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
return kernel_entry;
|
||
|
|
}
|
||
|
|
|
||
|
|
hwaddr riscv_load_initrd(const char *filename, uint64_t mem_size,
|
||
|
|
uint64_t kernel_entry, hwaddr *start)
|
||
|
|
{
|
||
|
|
int size;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* We want to put the initrd far enough into RAM that when the
|
||
|
|
* kernel is uncompressed it will not clobber the initrd. However
|
||
|
|
* on boards without much RAM we must ensure that we still leave
|
||
|
|
* enough room for a decent sized initrd, and on boards with large
|
||
|
|
* amounts of RAM we must avoid the initrd being so far up in RAM
|
||
|
|
* that it is outside lowmem and inaccessible to the kernel.
|
||
|
|
* So for boards with less than 256MB of RAM we put the initrd
|
||
|
|
* halfway into RAM, and for boards with 256MB of RAM or more we put
|
||
|
|
* the initrd at 128MB.
|
||
|
|
*/
|
||
|
|
*start = kernel_entry + MIN(mem_size / 2, 128 * MiB);
|
||
|
|
|
||
|
|
size = load_ramdisk(filename, *start, mem_size - *start);
|
||
|
|
if (size == -1) {
|
||
|
|
size = load_image_targphys(filename, *start, mem_size - *start);
|
||
|
|
if (size == -1) {
|
||
|
|
error_report("could not load ramdisk '%s'", filename);
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return *start + size;
|
||
|
|
}
|