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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (c) Copyright 2008 Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
* (c) Copyright 2008 Renesas Solutions Corp.
*/
#include <config.h>
#include <bootm.h>
#include <command.h>
#include <env.h>
#include <image.h>
#include <asm/byteorder.h>
#include <asm/global_data.h>
#include <asm/zimage.h>
DECLARE_GLOBAL_DATA_PTR;
#ifdef CONFIG_SH_SDRAM_OFFSET
#define GET_INITRD_START(initrd, linux) (initrd - linux + CONFIG_SH_SDRAM_OFFSET)
#else
#define GET_INITRD_START(initrd, linux) (initrd - linux)
#endif
static void set_sh_linux_param(unsigned long param_addr, unsigned long data)
{
*(unsigned long *)(param_addr) = data;
}
static unsigned long sh_check_cmd_arg(char *cmdline, char *key, int base)
{
unsigned long val = 0;
char *p = strstr(cmdline, key);
if (p) {
p += strlen(key);
val = simple_strtol(p, NULL, base);
}
return val;
}
int do_bootm_linux(int flag, struct bootm_info *bmi)
{
struct bootm_headers *images = bmi->images;
/* Linux kernel load address */
void (*kernel) (void) = (void (*)(void))images->ep;
/* empty_zero_page */
unsigned char *param
= (unsigned char *)image_get_load(images->legacy_hdr_os);
/* Linux kernel command line */
char *cmdline = (char *)param + COMMAND_LINE;
/* PAGE_SIZE */
unsigned long size = images->ep - (unsigned long)param;
char *bootargs = env_get("bootargs");
/*
* 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;
/* Clear zero page */
memset(param, 0, size);
/* Set commandline */
strcpy(cmdline, bootargs);
/* Initrd */
if (images->rd_start || images->rd_end) {
unsigned long ramdisk_flags = 0;
int val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_PROMPT, 10);
if (val == 1)
ramdisk_flags |= RD_PROMPT;
else
ramdisk_flags &= ~RD_PROMPT;
val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_DOLOAD, 10);
if (val == 1)
ramdisk_flags |= RD_DOLOAD;
else
ramdisk_flags &= ~RD_DOLOAD;
set_sh_linux_param((unsigned long)param + MOUNT_ROOT_RDONLY, 0x0001);
set_sh_linux_param((unsigned long)param + RAMDISK_FLAGS, ramdisk_flags);
set_sh_linux_param((unsigned long)param + ORIG_ROOT_DEV, 0x0200);
set_sh_linux_param((unsigned long)param + LOADER_TYPE, 0x0001);
set_sh_linux_param((unsigned long)param + INITRD_START,
GET_INITRD_START(images->rd_start, CFG_SYS_SDRAM_BASE));
set_sh_linux_param((unsigned long)param + INITRD_SIZE,
images->rd_end - images->rd_start);
}
/* Boot kernel */
kernel();
/* does not return */
return 1;
}
static ulong get_sp(void)
{
ulong ret;
asm("mov r15, %0" : "=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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