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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2003, Psyent Corporation <www.psyent.com>
* Scott McNutt <smcnutt@psyent.com>
*/
#include <bootm.h>
#include <cpu_func.h>
#include <env.h>
#include <image.h>
#include <irq_func.h>
#include <log.h>
#include <asm/global_data.h>
DECLARE_GLOBAL_DATA_PTR;
#define NIOS_MAGIC 0x534f494e /* enable command line and initrd passing */
int do_bootm_linux(int flag, struct bootm_info *bmi)
{
struct bootm_headers *images = bmi->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
/* TODO: Clean this up - the DT should already be set up */
if (!of_flat_tree && bmi->argc > 1)
of_flat_tree = (char *)hextoul(bmi->argv[1], NULL);
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;
}
static ulong get_sp(void)
{
ulong ret;
asm("mov %0, sp" : "=r"(ret) : );
return ret;
}
void arch_lmb_reserve(struct lmb *lmb)
{
arch_lmb_reserve_generic(lmb, get_sp(), gd->ram_top, 4096);
}
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