2db07d0506
When the system reboots, the rng-seed that the FDT has should be re-randomized, so that the new boot gets a new seed. Since the FDT is in the ROM region at this point, we add a hook right after the ROM has been added, so that we have a pointer to that copy of the FDT. Cc: Stafford Horne <shorne@gmail.com> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Message-id: 20221025004327.568476-11-Jason@zx2c4.com Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
120 lines
3.3 KiB
C
120 lines
3.3 KiB
C
/*
|
|
* 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;
|
|
}
|