63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2003, Psyent Corporation <www.psyent.com>
|
|
* Scott McNutt <smcnutt@psyent.com>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <cpu_func.h>
|
|
#include <env.h>
|
|
#include <image.h>
|
|
#include <irq_func.h>
|
|
#include <log.h>
|
|
|
|
#define NIOS_MAGIC 0x534f494e /* enable command line and initrd passing */
|
|
|
|
int do_bootm_linux(int flag, int argc, char *const argv[],
|
|
bootm_headers_t *images)
|
|
{
|
|
void (*kernel)(int, int, int, char *) = (void *)images->ep;
|
|
char *commandline = env_get("bootargs");
|
|
ulong initrd_start = images->rd_start;
|
|
ulong initrd_end = images->rd_end;
|
|
char *of_flat_tree = NULL;
|
|
#if defined(CONFIG_OF_LIBFDT)
|
|
/* did generic code already find a device tree? */
|
|
if (images->ft_len)
|
|
of_flat_tree = images->ft_addr;
|
|
#endif
|
|
if (!of_flat_tree && argc > 1)
|
|
of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16);
|
|
if (of_flat_tree)
|
|
initrd_end = (ulong)of_flat_tree;
|
|
|
|
/*
|
|
* allow the PREP bootm subcommand, it is required for bootm to work
|
|
*/
|
|
if (flag & BOOTM_STATE_OS_PREP)
|
|
return 0;
|
|
|
|
if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
|
|
return 1;
|
|
|
|
/* flushes data and instruction caches before calling the kernel */
|
|
disable_interrupts();
|
|
flush_dcache_all();
|
|
|
|
debug("bootargs=%s @ 0x%lx\n", commandline, (ulong)&commandline);
|
|
debug("initrd=0x%lx-0x%lx\n", (ulong)initrd_start, (ulong)initrd_end);
|
|
/* kernel parameters passing
|
|
* r4 : NIOS magic
|
|
* r5 : initrd start
|
|
* r6 : initrd end or fdt
|
|
* r7 : kernel command line
|
|
* fdt is passed to kernel via r6, the same as initrd_end. fdt will be
|
|
* verified with fdt magic. when both initrd and fdt are used at the
|
|
* same time, fdt must follow immediately after initrd.
|
|
*/
|
|
kernel(NIOS_MAGIC, initrd_start, initrd_end, commandline);
|
|
/* does not return */
|
|
|
|
return 1;
|
|
}
|