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/*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* QEMU OpenRISC boot helpers.
*
* (c) 2022 Stafford Horne <shorne@gmail.com>
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/cpu-defs.h"
#include "elf.h"
#include "hw/loader.h"
#include "hw/openrisc/boot.h"
#include "sysemu/device_tree.h"
#include "sysemu/qtest.h"
#include "sysemu/reset.h"
#include <libfdt.h>
#define KERNEL_LOAD_ADDR 0x100
hwaddr openrisc_load_kernel(ram_addr_t ram_size,
const char *kernel_filename,
uint32_t *bootstrap_pc)
{
long kernel_size;
uint64_t elf_entry;
uint64_t high_addr;
hwaddr entry;
if (kernel_filename && !qtest_enabled()) {
kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
&elf_entry, NULL, &high_addr, NULL, 1,
EM_OPENRISC, 1, 0);
entry = elf_entry;
if (kernel_size < 0) {
kernel_size = load_uimage(kernel_filename,
&entry, NULL, NULL, NULL, NULL);
high_addr = entry + kernel_size;
}
if (kernel_size < 0) {
kernel_size = load_image_targphys(kernel_filename,
KERNEL_LOAD_ADDR,
ram_size - KERNEL_LOAD_ADDR);
high_addr = KERNEL_LOAD_ADDR + kernel_size;
}
if (entry <= 0) {
entry = KERNEL_LOAD_ADDR;
}
if (kernel_size < 0) {
error_report("couldn't load the kernel '%s'", kernel_filename);
exit(1);
}
*bootstrap_pc = entry;
return high_addr;
}
return 0;
}
hwaddr openrisc_load_initrd(void *fdt, const char *filename,
hwaddr load_start, uint64_t mem_size)
{
int size;
hwaddr start;
/* We put the initrd right after the kernel; page aligned. */
start = TARGET_PAGE_ALIGN(load_start);
size = load_ramdisk(filename, start, mem_size - start);
if (size < 0) {
size = load_image_targphys(filename, start, mem_size - start);
if (size < 0) {
error_report("could not load ramdisk '%s'", filename);
exit(1);
}
}
if (fdt) {
qemu_fdt_setprop_cell(fdt, "/chosen",
"linux,initrd-start", start);
qemu_fdt_setprop_cell(fdt, "/chosen",
"linux,initrd-end", start + size);
}
return start + size;
}
uint32_t openrisc_load_fdt(void *fdt, hwaddr load_start,
uint64_t mem_size)
{
uint32_t fdt_addr;
int ret;
int fdtsize = fdt_totalsize(fdt);
if (fdtsize <= 0) {
error_report("invalid device-tree");
exit(1);
}
/* We put fdt right after the kernel and/or initrd. */
fdt_addr = TARGET_PAGE_ALIGN(load_start);
ret = fdt_pack(fdt);
/* Should only fail if we've built a corrupted tree */
g_assert(ret == 0);
/* copy in the device tree */
qemu_fdt_dumpdtb(fdt, fdtsize);
rom_add_blob_fixed_as("fdt", fdt, fdtsize, fdt_addr,
&address_space_memory);
qemu_register_reset_nosnapshotload(qemu_fdt_randomize_seeds,
rom_ptr_for_as(&address_space_memory, fdt_addr, fdtsize));
return fdt_addr;
}
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