Git Repo - J-u-boot.git/blame - arch/sh/lib/bootm.c

Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
0b135cfc NI	2	/*
	3	* (C) Copyright 2003
	4	* Wolfgang Denk, DENX Software Engineering, [email protected].
	5	*
6b44a439 NI	6	* (c) Copyright 2008 Nobuhiro Iwamatsu <[email protected]>
6b44a439 NI	7	* (c) Copyright 2008 Renesas Solutions Corp.
0b135cfc NI	8	*/
0b135cfc NI	9
03de305e	10	#include <config.h>
a48336e5	11	#include <bootm.h>
0b135cfc	12	#include <command.h>
09140113	13	#include <env.h>
4d72caa5	14	#include <image.h>
0b135cfc	15	#include <asm/byteorder.h>
1e0e5577	16	#include <asm/global_data.h>
9980df56	17	#include <asm/zimage.h>
0b135cfc	18
1e0e5577 MV	19	DECLARE_GLOBAL_DATA_PTR;
1e0e5577 MV	20
cf2c87d3 NI	21	#ifdef CONFIG_SH_SDRAM_OFFSET
	22	#define GET_INITRD_START(initrd, linux) (initrd - linux + CONFIG_SH_SDRAM_OFFSET)
	23	#else
	24	#define GET_INITRD_START(initrd, linux) (initrd - linux)
	25	#endif
	26
	27	static void set_sh_linux_param(unsigned long param_addr, unsigned long data)
	28	{
	29	(unsigned long )(param_addr) = data;
	30	}
	31
	32	static unsigned long sh_check_cmd_arg(char cmdline, char key, int base)
	33	{
	34	unsigned long val = 0;
	35	char *p = strstr(cmdline, key);
	36	if (p) {
	37	p += strlen(key);
	38	val = simple_strtol(p, NULL, base);
	39	}
	40	return val;
	41	}
	42
a48336e5	43	int do_bootm_linux(int flag, struct bootm_info *bmi)
0b135cfc	44	{
a48336e5 SG	45	struct bootm_headers *images = bmi->images;
a48336e5 SG	46
6b44a439	47	/* Linux kernel load address */
c160a954	48	void (kernel) (void) = (void ()(void))images->ep;
6b44a439	49	/* empty_zero_page */
b5d10a13 NI	50	unsigned char *param
b5d10a13 NI	51	= (unsigned char *)image_get_load(images->legacy_hdr_os);
6b44a439	52	/* Linux kernel command line */
cf2c87d3	53	char cmdline = (char )param + COMMAND_LINE;
6b44a439	54	/* PAGE_SIZE */
b5d10a13	55	unsigned long size = images->ep - (unsigned long)param;
00caae6d	56	char *bootargs = env_get("bootargs");
0b135cfc	57
2cb0e55a AB	58	/*
	59	* allow the PREP bootm subcommand, it is required for bootm to work
	60	*/
	61	if (flag & BOOTM_STATE_OS_PREP)
	62	return 0;
	63
49c3a861 KG	64	if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
	65	return 1;
	66
9980df56 NI	67	/* Clear zero page */
9980df56 NI	68	memset(param, 0, size);
cf2c87d3 NI	69
cf2c87d3 NI	70	/* Set commandline */
6b44a439	71	strcpy(cmdline, bootargs);
b02bad12	72
cf2c87d3 NI	73	/* Initrd */
cf2c87d3 NI	74	if (images->rd_start \|\| images->rd_end) {
de03f8bc	75	unsigned long ramdisk_flags = 0;
cf2c87d3 NI	76	int val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_PROMPT, 10);
	77	if (val == 1)
	78	ramdisk_flags \|= RD_PROMPT;
	79	else
	80	ramdisk_flags &= ~RD_PROMPT;
071bc923	81
cf2c87d3 NI	82	val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_DOLOAD, 10);
	83	if (val == 1)
	84	ramdisk_flags \|= RD_DOLOAD;
	85	else
	86	ramdisk_flags &= ~RD_DOLOAD;
	87
	88	set_sh_linux_param((unsigned long)param + MOUNT_ROOT_RDONLY, 0x0001);
	89	set_sh_linux_param((unsigned long)param + RAMDISK_FLAGS, ramdisk_flags);
	90	set_sh_linux_param((unsigned long)param + ORIG_ROOT_DEV, 0x0200);
	91	set_sh_linux_param((unsigned long)param + LOADER_TYPE, 0x0001);
	92	set_sh_linux_param((unsigned long)param + INITRD_START,
aa6e94de	93	GET_INITRD_START(images->rd_start, CFG_SYS_SDRAM_BASE));
cf2c87d3 NI	94	set_sh_linux_param((unsigned long)param + INITRD_SIZE,
	95	images->rd_end - images->rd_start);
	96	}
	97
	98	/* Boot kernel */
0b135cfc	99	kernel();
cd7c596e	100
9980df56	101	/* does not return */
40d7e99d	102	return 1;
0b135cfc	103	}