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/*
* (C) Copyright 2012
* Texas Instruments, <www.ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _SPL_H_
#define _SPL_H_
/* Platform-specific defines */
#include <linux/compiler.h>
#include <asm/spl.h>
/* Value in r0 indicates we booted from U-Boot */
#define UBOOT_NOT_LOADED_FROM_SPL 0x13578642
/* Boot type */
#define MMCSD_MODE_UNDEFINED 0
#define MMCSD_MODE_RAW 1
#define MMCSD_MODE_FS 2
#define MMCSD_MODE_EMMCBOOT 3
struct spl_image_info {
const char *name;
u8 os;
u32 load_addr;
u32 entry_point;
u32 size;
u32 flags;
};
/*
* Information required to load data from a device
*
* @dev: Pointer to the device, e.g. struct mmc *
* @priv: Private data for the device
* @bl_len: Block length for reading in bytes
* @filename: Name of the fit image file.
* @read: Function to call to read from the device
*/
struct spl_load_info {
void *dev;
void *priv;
int bl_len;
const char *filename;
ulong (*read)(struct spl_load_info *load, ulong sector, ulong count,
void *buf);
};
/**
* spl_load_simple_fit() - Loads a fit image from a device.
* @info: Structure containing the information required to load data.
* @sector: Sector number where FIT image is located in the device
* @fdt: Pointer to the copied FIT header.
*
* Reads the FIT image @sector in the device. Loads u-boot image to
* specified load address and copies the dtb to end of u-boot image.
* Returns 0 on success.
*/
int spl_load_simple_fit(struct spl_load_info *info, ulong sector, void *fdt);
#define SPL_COPY_PAYLOAD_ONLY 1
extern struct spl_image_info spl_image;
/* SPL common functions */
void preloader_console_init(void);
u32 spl_boot_device(void);
u32 spl_boot_mode(const u32 boot_device);
/**
* spl_set_header_raw_uboot() - Set up a standard SPL image structure
*
* This sets up the given spl_image which the standard values obtained from
* config options: CONFIG_SYS_MONITOR_LEN, CONFIG_SYS_UBOOT_START,
* CONFIG_SYS_TEXT_BASE.
*
* @spl_image: Image description to set up
*/
void spl_set_header_raw_uboot(struct spl_image_info *spl_image);
/**
* spl_parse_image_header() - parse the image header and set up info
*
* This parses the legacy image header information at @header and sets up
* @spl_image according to what is found. If no image header is found, then
* a raw image or bootz is assumed. If CONFIG_SPL_PANIC_ON_RAW_IMAGE is
* enabled, then this causes a panic. If CONFIG_SPL_ABORT_ON_RAW_IMAGE is
* enabled then U-Boot gives up. Otherwise U-Boot sets up the image using
* spl_set_header_raw_uboot(), or possibly the bootz header.
*
* @spl_image: Image description to set up
* @header image header to parse
* @return 0 if a header was correctly parsed, -ve on error
*/
int spl_parse_image_header(struct spl_image_info *spl_image,
const struct image_header *header);
void spl_board_prepare_for_linux(void);
void spl_board_prepare_for_boot(void);
int spl_board_ubi_load_image(u32 boot_device);
/**
* jump_to_image_linux() - Jump to a Linux kernel from SPL
*
* This jumps into a Linux kernel using the information in @spl_image.
*
* @spl_image: Image description to set up
* @arg: Argument to pass to Linux (typically a device tree pointer)
*/
void __noreturn jump_to_image_linux(struct spl_image_info *spl_image,
void *arg);
/**
* spl_start_uboot() - Check if SPL should start the kernel or U-Boot
*
* This is called by the various SPL loaders to determine whether the board
* wants to load the kernel or U-Boot. This function should be provided by
* the board.
*
* @return 0 if SPL should start the kernel, 1 if U-Boot must be started
*/
int spl_start_uboot(void);
/**
* spl_display_print() - Display a board-specific message in SPL
*
* If CONFIG_SPL_DISPLAY_PRINT is enabled, U-Boot will call this function
* immediately after displaying the SPL console banner ("U-Boot SPL ...").
* This function should be provided by the board.
*/
void spl_display_print(void);
/**
* struct spl_boot_device - Describes a boot device used by SPL
*
* @boot_device: A number indicating the BOOT_DEVICE type. There are various
* BOOT_DEVICE... #defines and enums in U-Boot and they are not consistently
* numbered.
* @boot_device_name: Named boot device, or NULL if none.
*
* Note: Additional fields can be added here, bearing in mind that SPL is
* size-sensitive and common fields will be present on all boards. This
* struct can also be used to return additional information about the load
* process if that becomes useful.
*/
struct spl_boot_device {
uint boot_device;
const char *boot_device_name;
};
/**
* Holds information about a way of loading an SPL image
*
* @boot_device: Boot device that this loader supports
* @load_image: Function to call to load image
*/
struct spl_image_loader {
uint boot_device;
/**
* load_image() - Load an SPL image
*
* @bootdev: describes the boot device to load from
*/
int (*load_image)(struct spl_boot_device *bootdev);
};
/* Declare an SPL image loader */
#define SPL_LOAD_IMAGE(__name) \
ll_entry_declare(struct spl_image_loader, __name, spl_image_loader)
/*
* __priority is the priority of this method, 0 meaning it will be the top
* choice for this device, 9 meaning it is the bottom choice.
* __boot_device is the BOOT_DEVICE_... value
* __method is the load_image function to call
*/
#define SPL_LOAD_IMAGE_METHOD(__priority, __boot_device, __method) \
SPL_LOAD_IMAGE(__method ## __priority ## __boot_device) = { \
.boot_device = __boot_device, \
.load_image = __method, \
}
/* SPL FAT image functions */
int spl_load_image_fat(struct blk_desc *block_dev, int partition,
const char *filename);
int spl_load_image_fat_os(struct blk_desc *block_dev, int partition);
void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image);
/* SPL EXT image functions */
int spl_load_image_ext(struct blk_desc *block_dev, int partition,
const char *filename);
int spl_load_image_ext_os(struct blk_desc *block_dev, int partition);
/**
* spl_init() - Set up device tree and driver model in SPL if enabled
*
* Call this function in board_init_f() if you want to use device tree and
* driver model early, before board_init_r() is called. This function will
* be called from board_init_r() if not called earlier.
*
* If this is not called, then driver model will be inactive in SPL's
* board_init_f(), and no device tree will be available.
*/
int spl_init(void);
#ifdef CONFIG_SPL_BOARD_INIT
void spl_board_init(void);
#endif
/**
* spl_was_boot_source() - check if U-Boot booted from SPL
*
* This will normally be true, but if U-Boot jumps to second U-Boot, it will
* be false. This should be implemented by board-specific code.
*
* @return true if U-Boot booted from SPL, else false
*/
bool spl_was_boot_source(void);
/**
* spl_dfu_cmd- run dfu command with chosen mmc device interface
* @param usb_index - usb controller number
* @param mmc_dev - mmc device nubmer
*
* @return 0 on success, otherwise error code
*/
int spl_dfu_cmd(int usbctrl, char *dfu_alt_info, char *interface, char *devstr);
/**
* Board-specific load method for boards that have a special way of loading
* U-Boot, which does not fit with the existing SPL code.
*
* @return 0 on success, negative errno value on failure.
*/
int spl_board_load_image(struct spl_boot_device *bootdev);
#endif
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