common/spl/spl.c - boot/u-boot-linaro-stable - Git at Google

 /*
  * (C) Copyright 2010
  * Texas Instruments, <www.ti.com>
  *
  * Aneesh V <aneesh@ti.com>
  *
  * 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.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  * MA 02111-1307 USA
  */
 #include <common.h>
 #include <spl.h>
 #include <asm/u-boot.h>
 #include <nand.h>
 #include <fat.h>
 #include <version.h>
 #include <i2c.h>
 #include <image.h>
 #include <malloc.h>
 #include <linux/compiler.h>

 DECLARE_GLOBAL_DATA_PTR;

 #ifndef CONFIG_SYS_UBOOT_START
 #define CONFIG_SYS_UBOOT_START	CONFIG_SYS_TEXT_BASE
 #endif
 #ifndef CONFIG_SYS_MONITOR_LEN
 #define CONFIG_SYS_MONITOR_LEN	(200 * 1024)
 #endif

 u32 *boot_params_ptr = NULL;
 struct spl_image_info spl_image;

 /* Define board data structure */
 static bd_t bdata __attribute__ ((section(".data")));

 inline void hang(void)
 {
 	puts("### ERROR ### Please RESET the board ###\n");
 	for (;;)
 		;
 }

 /*
  * Default function to determine if u-boot or the OS should
  * be started. This implementation always returns 1.
  *
  * Please implement your own board specific funcion to do this.
  *
  * RETURN
  * 0 to not start u-boot
  * positive if u-boot should start
  */
 #ifdef CONFIG_SPL_OS_BOOT
 __weak int spl_start_uboot(void)
 {
 	puts("SPL: Please implement spl_start_uboot() for your board\n");
 	puts("SPL: Direct Linux boot not active!\n");
 	return 1;
 }
 #endif

 void spl_parse_image_header(const struct image_header *header)
 {
 	u32 header_size = sizeof(struct image_header);

 	if (image_get_magic(header) == IH_MAGIC) {
 		if (spl_image.flags & SPL_COPY_PAYLOAD_ONLY) {
 			/*
 			 * On some system (e.g. powerpc), the load-address and
 			 * entry-point is located at address 0. We can't load
 			 * to 0-0x40. So skip header in this case.
 			 */
 			spl_image.load_addr = image_get_load(header);
 			spl_image.entry_point = image_get_ep(header);
 			spl_image.size = image_get_data_size(header);
 		} else {
 			spl_image.entry_point = image_get_load(header);
 			/* Load including the header */
 			spl_image.load_addr = spl_image.entry_point -
 				header_size;
 			spl_image.size = image_get_data_size(header) +
 				header_size;
 		}
 		spl_image.os = image_get_os(header);
 		spl_image.name = image_get_name(header);
 		debug("spl: payload image: %s load addr: 0x%x size: %d\n",
 			spl_image.name, spl_image.load_addr, spl_image.size);
 	} else {
 		/* Signature not found - assume u-boot.bin */
 		debug("mkimage signature not found - ih_magic = %x\n",
 			header->ih_magic);
 		/* Let's assume U-Boot will not be more than 200 KB */
 		spl_image.size = CONFIG_SYS_MONITOR_LEN;
 		spl_image.entry_point = CONFIG_SYS_UBOOT_START;
 		spl_image.load_addr = CONFIG_SYS_TEXT_BASE;
 		spl_image.os = IH_OS_U_BOOT;
 		spl_image.name = "U-Boot";
 	}
 }

 static void __noreturn jump_to_image_no_args(void)
 {
 	typedef void __noreturn (*image_entry_noargs_t)(u32 *);
 	image_entry_noargs_t image_entry =
 			(image_entry_noargs_t) spl_image.entry_point;

 	debug("image entry point: 0x%X\n", spl_image.entry_point);
 	/* Pass the saved boot_params from rom code */
 #if defined(CONFIG_VIRTIO) || defined(CONFIG_ZEBU)
 	image_entry = (image_entry_noargs_t)0x80100000;
 #endif
 	u32 boot_params_ptr_addr = (u32)&boot_params_ptr;
 	image_entry((u32 *)boot_params_ptr_addr);
 }

 #ifdef CONFIG_SPL_RAM_DEVICE
 static void spl_ram_load_image(void)
 {
 	const struct image_header *header;

 	/*
 	 * Get the header.  It will point to an address defined by handoff
 	 * which will tell where the image located inside the flash. For
 	 * now, it will temporary fixed to address pointed by U-Boot.
 	 */
 	header = (struct image_header *)
 		(CONFIG_SYS_TEXT_BASE -	sizeof(struct image_header));

 	spl_parse_image_header(header);
 }
 #endif

 void board_init_r(gd_t *dummy1, ulong dummy2)
 {
 	u32 boot_device;
 	debug(">>spl:board_init_r()\n");

 #ifdef CONFIG_SYS_SPL_MALLOC_START
 	mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
 			CONFIG_SYS_SPL_MALLOC_SIZE);
 #endif

 	timer_init();

 #ifdef CONFIG_SPL_BOARD_INIT
 	spl_board_init();
 #endif

 	boot_device = spl_boot_device();
 	debug("boot device - %d\n", boot_device);
 	switch (boot_device) {
 #ifdef CONFIG_SPL_RAM_DEVICE
 	case BOOT_DEVICE_RAM:
 		spl_ram_load_image();
 		break;
 #endif
 #ifdef CONFIG_SPL_MMC_SUPPORT
 	case BOOT_DEVICE_MMC1:
 	case BOOT_DEVICE_MMC2:
 	case BOOT_DEVICE_MMC2_2:
 		spl_mmc_load_image();
 		break;
 #endif
 #ifdef CONFIG_SPL_NAND_SUPPORT
 	case BOOT_DEVICE_NAND:
 		spl_nand_load_image();
 		break;
 #endif
 #ifdef CONFIG_SPL_NOR_SUPPORT
 	case BOOT_DEVICE_NOR:
 		spl_nor_load_image();
 		break;
 #endif
 #ifdef CONFIG_SPL_YMODEM_SUPPORT
 	case BOOT_DEVICE_UART:
 		spl_ymodem_load_image();
 		break;
 #endif
 #ifdef CONFIG_SPL_SPI_SUPPORT
 	case BOOT_DEVICE_SPI:
 		spl_spi_load_image();
 		break;
 #endif
 #ifdef CONFIG_SPL_ETH_SUPPORT
 	case BOOT_DEVICE_CPGMAC:
 #ifdef CONFIG_SPL_ETH_DEVICE
 		spl_net_load_image(CONFIG_SPL_ETH_DEVICE);
 #else
 		spl_net_load_image(NULL);
 #endif
 		break;
 #endif
 #ifdef CONFIG_SPL_DSU_SUPPORT
 	case BOOT_DEVICE_USB:
 		spl_dsu_load_image();
 		break;
 #endif
 	default:
 		debug("SPL: Un-supported Boot Device\n");
 		hang();
 	}

 	switch (spl_image.os) {
 	case IH_OS_U_BOOT:
 		debug("Jumping to U-Boot\n");
 		break;
 #ifdef CONFIG_SPL_OS_BOOT
 	case IH_OS_LINUX:
 		debug("Jumping to Linux\n");
 		spl_board_prepare_for_linux();
 		jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR);
 #endif
 	default:
 		debug("Unsupported OS image.. Jumping nevertheless..\n");
 	}
 	jump_to_image_no_args();
 }

 /*
  * This requires UART clocks to be enabled.  In order for this to work the
  * caller must ensure that the gd pointer is valid.
  */
 void preloader_console_init(void)
 {
 	gd->bd = &bdata;
 	gd->baudrate = CONFIG_BAUDRATE;

 	serial_init();		/* serial communications setup */

 	gd->have_console = 1;

 	puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
 			U_BOOT_TIME ")\n");
 #ifdef CONFIG_SPL_DISPLAY_PRINT
 	spl_display_print();
 #endif
 }
	/*
	* (C) Copyright 2010
	* Texas Instruments, <www.ti.com>
	*
	* Aneesh V <aneesh@ti.com>
	*
	* 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.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	* MA 02111-1307 USA
	*/
	#include <common.h>
	#include <spl.h>
	#include <asm/u-boot.h>
	#include <nand.h>
	#include <fat.h>
	#include <version.h>
	#include <i2c.h>
	#include <image.h>
	#include <malloc.h>
	#include <linux/compiler.h>

	DECLARE_GLOBAL_DATA_PTR;

	#ifndef CONFIG_SYS_UBOOT_START
	#define CONFIG_SYS_UBOOT_START CONFIG_SYS_TEXT_BASE
	#endif
	#ifndef CONFIG_SYS_MONITOR_LEN
	#define CONFIG_SYS_MONITOR_LEN (200 * 1024)
	#endif

	u32 *boot_params_ptr = NULL;
	struct spl_image_info spl_image;

	/* Define board data structure */
	static bd_t bdata __attribute__ ((section(".data")));

	inline void hang(void)
	{
	puts("### ERROR ### Please RESET the board ###\n");
	for (;;)
	;
	}

	/*
	* Default function to determine if u-boot or the OS should
	* be started. This implementation always returns 1.
	*
	* Please implement your own board specific funcion to do this.
	*
	* RETURN
	* 0 to not start u-boot
	* positive if u-boot should start
	*/
	#ifdef CONFIG_SPL_OS_BOOT
	__weak int spl_start_uboot(void)
	{
	puts("SPL: Please implement spl_start_uboot() for your board\n");
	puts("SPL: Direct Linux boot not active!\n");
	return 1;
	}
	#endif

	void spl_parse_image_header(const struct image_header *header)
	{
	u32 header_size = sizeof(struct image_header);

	if (image_get_magic(header) == IH_MAGIC) {
	if (spl_image.flags & SPL_COPY_PAYLOAD_ONLY) {
	/*
	* On some system (e.g. powerpc), the load-address and
	* entry-point is located at address 0. We can't load
	* to 0-0x40. So skip header in this case.
	*/
	spl_image.load_addr = image_get_load(header);
	spl_image.entry_point = image_get_ep(header);
	spl_image.size = image_get_data_size(header);
	} else {
	spl_image.entry_point = image_get_load(header);
	/* Load including the header */
	spl_image.load_addr = spl_image.entry_point -
	header_size;
	spl_image.size = image_get_data_size(header) +
	header_size;
	}
	spl_image.os = image_get_os(header);
	spl_image.name = image_get_name(header);
	debug("spl: payload image: %s load addr: 0x%x size: %d\n",
	spl_image.name, spl_image.load_addr, spl_image.size);
	} else {
	/* Signature not found - assume u-boot.bin */
	debug("mkimage signature not found - ih_magic = %x\n",
	header->ih_magic);
	/* Let's assume U-Boot will not be more than 200 KB */
	spl_image.size = CONFIG_SYS_MONITOR_LEN;
	spl_image.entry_point = CONFIG_SYS_UBOOT_START;
	spl_image.load_addr = CONFIG_SYS_TEXT_BASE;
	spl_image.os = IH_OS_U_BOOT;
	spl_image.name = "U-Boot";
	}
	}

	static void __noreturn jump_to_image_no_args(void)
	{
	typedef void __noreturn (image_entry_noargs_t)(u32 );
	image_entry_noargs_t image_entry =
	(image_entry_noargs_t) spl_image.entry_point;

	debug("image entry point: 0x%X\n", spl_image.entry_point);
	/* Pass the saved boot_params from rom code */
	#if defined(CONFIG_VIRTIO) \|\| defined(CONFIG_ZEBU)
	image_entry = (image_entry_noargs_t)0x80100000;
	#endif
	u32 boot_params_ptr_addr = (u32)&boot_params_ptr;
	image_entry((u32 *)boot_params_ptr_addr);
	}

	#ifdef CONFIG_SPL_RAM_DEVICE
	static void spl_ram_load_image(void)
	{
	const struct image_header *header;

	/*
	* Get the header. It will point to an address defined by handoff
	* which will tell where the image located inside the flash. For
	* now, it will temporary fixed to address pointed by U-Boot.
	*/
	header = (struct image_header *)
	(CONFIG_SYS_TEXT_BASE - sizeof(struct image_header));

	spl_parse_image_header(header);
	}
	#endif

	void board_init_r(gd_t *dummy1, ulong dummy2)
	{
	u32 boot_device;
	debug(">>spl:board_init_r()\n");

	#ifdef CONFIG_SYS_SPL_MALLOC_START
	mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
	CONFIG_SYS_SPL_MALLOC_SIZE);
	#endif

	timer_init();

	#ifdef CONFIG_SPL_BOARD_INIT
	spl_board_init();
	#endif

	boot_device = spl_boot_device();
	debug("boot device - %d\n", boot_device);
	switch (boot_device) {
	#ifdef CONFIG_SPL_RAM_DEVICE
	case BOOT_DEVICE_RAM:
	spl_ram_load_image();
	break;
	#endif
	#ifdef CONFIG_SPL_MMC_SUPPORT
	case BOOT_DEVICE_MMC1:
	case BOOT_DEVICE_MMC2:
	case BOOT_DEVICE_MMC2_2:
	spl_mmc_load_image();
	break;
	#endif
	#ifdef CONFIG_SPL_NAND_SUPPORT
	case BOOT_DEVICE_NAND:
	spl_nand_load_image();
	break;
	#endif
	#ifdef CONFIG_SPL_NOR_SUPPORT
	case BOOT_DEVICE_NOR:
	spl_nor_load_image();
	break;
	#endif
	#ifdef CONFIG_SPL_YMODEM_SUPPORT
	case BOOT_DEVICE_UART:
	spl_ymodem_load_image();
	break;
	#endif
	#ifdef CONFIG_SPL_SPI_SUPPORT
	case BOOT_DEVICE_SPI:
	spl_spi_load_image();
	break;
	#endif
	#ifdef CONFIG_SPL_ETH_SUPPORT
	case BOOT_DEVICE_CPGMAC:
	#ifdef CONFIG_SPL_ETH_DEVICE
	spl_net_load_image(CONFIG_SPL_ETH_DEVICE);
	#else
	spl_net_load_image(NULL);
	#endif
	break;
	#endif
	#ifdef CONFIG_SPL_DSU_SUPPORT
	case BOOT_DEVICE_USB:
	spl_dsu_load_image();
	break;
	#endif
	default:
	debug("SPL: Un-supported Boot Device\n");
	hang();
	}

	switch (spl_image.os) {
	case IH_OS_U_BOOT:
	debug("Jumping to U-Boot\n");
	break;
	#ifdef CONFIG_SPL_OS_BOOT
	case IH_OS_LINUX:
	debug("Jumping to Linux\n");
	spl_board_prepare_for_linux();
	jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR);
	#endif
	default:
	debug("Unsupported OS image.. Jumping nevertheless..\n");
	}
	jump_to_image_no_args();
	}

	/*
	* This requires UART clocks to be enabled. In order for this to work the
	* caller must ensure that the gd pointer is valid.
	*/
	void preloader_console_init(void)
	{
	gd->bd = &bdata;
	gd->baudrate = CONFIG_BAUDRATE;

	serial_init(); /* serial communications setup */

	gd->have_console = 1;

	puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
	U_BOOT_TIME ")\n");
	#ifdef CONFIG_SPL_DISPLAY_PRINT
	spl_display_print();
	#endif
	}