[people/ms/u-boot.git] / arch / powerpc / cpu / ppc4xx / spl_boot.c

/*
 * Copyright (C) 2013 Stefan Roese <sr@denx.de>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
 * GNU General Public License for more details.
 */

#include <common.h>
#include <spl.h>

DECLARE_GLOBAL_DATA_PTR;

/*
 * Return selected boot device. On PPC4xx its only NOR flash right now.
 */
u32 spl_boot_device(void)
{
	return BOOT_DEVICE_NOR;
}

/*
 * SPL version of board_init_f()
 */
void board_init_f(ulong bootflag)
{
	/*
	 * First we need to initialize the SDRAM, so that the real
	 * U-Boot or the OS (Linux) can be loaded
	 */
	initdram(0);

	/* Clear bss */
	memset(__bss_start, '\0', __bss_end - __bss_start);

	/*
	 * Init global_data pointer. Has to be done before calling
	 * get_clocks(), as it stores some clock values into gd needed
	 * later on in the serial driver.
	 */
	/* Pointer is writable since we allocated a register for it */
	gd = (gd_t *)(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
	/* Clear initial global data */
	memset((void *)gd, 0, sizeof(gd_t));

	/*
	 * get_clocks() needs to be called so that the serial driver
	 * works correctly
	 */
	get_clocks();

	/*
	 * Do rudimental console / serial setup
	 */
	preloader_console_init();

	/*
	 * Call board_init_r() (SPL framework version) to load and boot
	 * real U-Boot or OS
	 */
	board_init_r(NULL, 0);
	/* Does not return!!! */
}
Commit	Line	Data
98f99e9f SR	1	/*
	2	* Copyright (C) 2013 Stefan Roese <sr@denx.de>
	3	*
	4	* See file CREDITS for list of people who contributed to this
	5	* project.
	6	*
	7	* This program is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU General Public License as
	9	* published by the Free Software Foundation; either version 2 of
	10	* the License, or (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*/
	17
	18	#include <common.h>
	19	#include <spl.h>
	20
	21	DECLARE_GLOBAL_DATA_PTR;
	22
	23	/*
	24	* Return selected boot device. On PPC4xx its only NOR flash right now.
	25	*/
	26	u32 spl_boot_device(void)
	27	{
	28	return BOOT_DEVICE_NOR;
	29	}
	30
	31	/*
	32	* SPL version of board_init_f()
	33	*/
	34	void board_init_f(ulong bootflag)
	35	{
	36	/*
	37	* First we need to initialize the SDRAM, so that the real
	38	* U-Boot or the OS (Linux) can be loaded
	39	*/
	40	initdram(0);
	41
	42	/* Clear bss */
	43	memset(__bss_start, '\0', __bss_end - __bss_start);
	44
	45	/*
	46	* Init global_data pointer. Has to be done before calling
	47	* get_clocks(), as it stores some clock values into gd needed
	48	* later on in the serial driver.
	49	*/
	50	/* Pointer is writable since we allocated a register for it */
	51	gd = (gd_t *)(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
	52	/* Clear initial global data */
	53	memset((void *)gd, 0, sizeof(gd_t));
	54
	55	/*
	56	* get_clocks() needs to be called so that the serial driver
	57	* works correctly
	58	*/
	59	get_clocks();
	60
	61	/*
	62	* Do rudimental console / serial setup
	63	*/
	64	preloader_console_init();
65
66	/*
67	* Call board_init_r() (SPL framework version) to load and boot
68	* real U-Boot or OS
69	*/
70	board_init_r(NULL, 0);
71	/* Does not return!!! */
72	}