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https://github.com/brain-hackers/u-boot-brain
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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
300 lines
9.4 KiB
C
300 lines
9.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2012
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* Texas Instruments, <www.ti.com>
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*/
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#ifndef _SPL_H_
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#define _SPL_H_
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#include <binman_sym.h>
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/* Platform-specific defines */
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#include <linux/compiler.h>
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#include <asm/spl.h>
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/* Value in r0 indicates we booted from U-Boot */
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#define UBOOT_NOT_LOADED_FROM_SPL 0x13578642
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/* Boot type */
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#define MMCSD_MODE_UNDEFINED 0
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#define MMCSD_MODE_RAW 1
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#define MMCSD_MODE_FS 2
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#define MMCSD_MODE_EMMCBOOT 3
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struct spl_image_info {
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const char *name;
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u8 os;
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uintptr_t load_addr;
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uintptr_t entry_point;
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#if CONFIG_IS_ENABLED(LOAD_FIT)
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void *fdt_addr;
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#endif
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u32 size;
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u32 flags;
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void *arg;
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};
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/*
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* Information required to load data from a device
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*
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* @dev: Pointer to the device, e.g. struct mmc *
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* @priv: Private data for the device
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* @bl_len: Block length for reading in bytes
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* @filename: Name of the fit image file.
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* @read: Function to call to read from the device
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*/
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struct spl_load_info {
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void *dev;
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void *priv;
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int bl_len;
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const char *filename;
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ulong (*read)(struct spl_load_info *load, ulong sector, ulong count,
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void *buf);
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};
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/*
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* We need to know the position of U-Boot in memory so we can jump to it. We
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* allow any U-Boot binary to be used (u-boot.bin, u-boot-nodtb.bin,
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* u-boot.img), hence the '_any'. These is no checking here that the correct
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* image is found. For * example if u-boot.img is used we don't check that
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* spl_parse_image_header() can parse a valid header.
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*/
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binman_sym_extern(ulong, u_boot_any, pos);
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/**
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* spl_load_simple_fit() - Loads a fit image from a device.
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* @spl_image: Image description to set up
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* @info: Structure containing the information required to load data.
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* @sector: Sector number where FIT image is located in the device
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* @fdt: Pointer to the copied FIT header.
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*
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* Reads the FIT image @sector in the device. Loads u-boot image to
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* specified load address and copies the dtb to end of u-boot image.
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* Returns 0 on success.
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*/
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int spl_load_simple_fit(struct spl_image_info *spl_image,
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struct spl_load_info *info, ulong sector, void *fdt);
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#define SPL_COPY_PAYLOAD_ONLY 1
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/* SPL common functions */
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void preloader_console_init(void);
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u32 spl_boot_device(void);
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u32 spl_boot_mode(const u32 boot_device);
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int spl_boot_partition(const u32 boot_device);
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void spl_set_bd(void);
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/**
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* spl_set_header_raw_uboot() - Set up a standard SPL image structure
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*
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* This sets up the given spl_image which the standard values obtained from
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* config options: CONFIG_SYS_MONITOR_LEN, CONFIG_SYS_UBOOT_START,
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* CONFIG_SYS_TEXT_BASE.
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*
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* @spl_image: Image description to set up
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*/
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void spl_set_header_raw_uboot(struct spl_image_info *spl_image);
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/**
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* spl_parse_image_header() - parse the image header and set up info
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*
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* This parses the legacy image header information at @header and sets up
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* @spl_image according to what is found. If no image header is found, then
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* a raw image or bootz is assumed. If CONFIG_SPL_PANIC_ON_RAW_IMAGE is
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* enabled, then this causes a panic. If CONFIG_SPL_RAW_IMAGE_SUPPORT is not
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* enabled then U-Boot gives up. Otherwise U-Boot sets up the image using
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* spl_set_header_raw_uboot(), or possibly the bootz header.
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*
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* @spl_image: Image description to set up
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* @header image header to parse
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* @return 0 if a header was correctly parsed, -ve on error
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*/
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int spl_parse_image_header(struct spl_image_info *spl_image,
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const struct image_header *header);
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void spl_board_prepare_for_linux(void);
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void spl_board_prepare_for_boot(void);
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int spl_board_ubi_load_image(u32 boot_device);
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/**
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* jump_to_image_linux() - Jump to a Linux kernel from SPL
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*
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* This jumps into a Linux kernel using the information in @spl_image.
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*
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* @spl_image: Image description to set up
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*/
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void __noreturn jump_to_image_linux(struct spl_image_info *spl_image);
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/**
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* spl_start_uboot() - Check if SPL should start the kernel or U-Boot
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*
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* This is called by the various SPL loaders to determine whether the board
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* wants to load the kernel or U-Boot. This function should be provided by
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* the board.
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*
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* @return 0 if SPL should start the kernel, 1 if U-Boot must be started
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*/
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int spl_start_uboot(void);
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/**
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* spl_display_print() - Display a board-specific message in SPL
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*
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* If CONFIG_SPL_DISPLAY_PRINT is enabled, U-Boot will call this function
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* immediately after displaying the SPL console banner ("U-Boot SPL ...").
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* This function should be provided by the board.
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*/
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void spl_display_print(void);
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/**
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* struct spl_boot_device - Describes a boot device used by SPL
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*
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* @boot_device: A number indicating the BOOT_DEVICE type. There are various
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* BOOT_DEVICE... #defines and enums in U-Boot and they are not consistently
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* numbered.
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* @boot_device_name: Named boot device, or NULL if none.
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*
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* Note: Additional fields can be added here, bearing in mind that SPL is
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* size-sensitive and common fields will be present on all boards. This
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* struct can also be used to return additional information about the load
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* process if that becomes useful.
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*/
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struct spl_boot_device {
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uint boot_device;
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const char *boot_device_name;
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};
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/**
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* Holds information about a way of loading an SPL image
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*
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* @name: User-friendly name for this method (e.g. "MMC")
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* @boot_device: Boot device that this loader supports
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* @load_image: Function to call to load image
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*/
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struct spl_image_loader {
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#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
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const char *name;
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#endif
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uint boot_device;
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/**
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* load_image() - Load an SPL image
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*
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* @spl_image: place to put image information
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* @bootdev: describes the boot device to load from
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*/
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int (*load_image)(struct spl_image_info *spl_image,
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struct spl_boot_device *bootdev);
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};
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/* Declare an SPL image loader */
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#define SPL_LOAD_IMAGE(__name) \
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ll_entry_declare(struct spl_image_loader, __name, spl_image_loader)
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/*
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* _priority is the priority of this method, 0 meaning it will be the top
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* choice for this device, 9 meaning it is the bottom choice.
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* _boot_device is the BOOT_DEVICE_... value
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* _method is the load_image function to call
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*/
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#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
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#define SPL_LOAD_IMAGE_METHOD(_name, _priority, _boot_device, _method) \
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SPL_LOAD_IMAGE(_method ## _priority ## _boot_device) = { \
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.name = _name, \
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.boot_device = _boot_device, \
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.load_image = _method, \
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}
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#else
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#define SPL_LOAD_IMAGE_METHOD(_name, _priority, _boot_device, _method) \
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SPL_LOAD_IMAGE(_method ## _priority ## _boot_device) = { \
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.boot_device = _boot_device, \
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.load_image = _method, \
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}
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#endif
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/* SPL FAT image functions */
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int spl_load_image_fat(struct spl_image_info *spl_image,
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struct blk_desc *block_dev, int partition,
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const char *filename);
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int spl_load_image_fat_os(struct spl_image_info *spl_image,
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struct blk_desc *block_dev, int partition);
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void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image);
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/* SPL EXT image functions */
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int spl_load_image_ext(struct spl_image_info *spl_image,
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struct blk_desc *block_dev, int partition,
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const char *filename);
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int spl_load_image_ext_os(struct spl_image_info *spl_image,
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struct blk_desc *block_dev, int partition);
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/**
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* spl_early_init() - Set up device tree and driver model in SPL if enabled
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*
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* Call this function in board_init_f() if you want to use device tree and
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* driver model early, before board_init_r() is called.
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*
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* If this is not called, then driver model will be inactive in SPL's
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* board_init_f(), and no device tree will be available.
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*/
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int spl_early_init(void);
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/**
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* spl_init() - Set up device tree and driver model in SPL if enabled
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*
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* You can optionally call spl_early_init(), then optionally call spl_init().
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* This function will be called from board_init_r() if not called earlier.
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*
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* Both spl_early_init() and spl_init() perform a similar function except that
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* the latter will not set up the malloc() area if
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* CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN is enabled, since it is assumed to
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* already be done by a calll to spl_relocate_stack_gd() before board_init_r()
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* is reached.
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*
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* This function will be called from board_init_r() if not called earlier.
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*
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* If this is not called, then driver model will be inactive in SPL's
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* board_init_f(), and no device tree will be available.
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*/
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int spl_init(void);
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#ifdef CONFIG_SPL_BOARD_INIT
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void spl_board_init(void);
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#endif
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/**
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* spl_was_boot_source() - check if U-Boot booted from SPL
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*
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* This will normally be true, but if U-Boot jumps to second U-Boot, it will
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* be false. This should be implemented by board-specific code.
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*
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* @return true if U-Boot booted from SPL, else false
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*/
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bool spl_was_boot_source(void);
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/**
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* spl_dfu_cmd- run dfu command with chosen mmc device interface
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* @param usb_index - usb controller number
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* @param mmc_dev - mmc device nubmer
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*
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* @return 0 on success, otherwise error code
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*/
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int spl_dfu_cmd(int usbctrl, char *dfu_alt_info, char *interface, char *devstr);
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int spl_mmc_load_image(struct spl_image_info *spl_image,
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struct spl_boot_device *bootdev);
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/**
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* spl_invoke_atf - boot using an ARM trusted firmware image
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*/
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void spl_invoke_atf(struct spl_image_info *spl_image);
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/**
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* board_return_to_bootrom - allow for boards to continue with the boot ROM
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*
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* If a board (e.g. the Rockchip RK3368 boards) provide some
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* supporting functionality for SPL in their boot ROM and the SPL
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* stage wants to return to the ROM code to continue booting, boards
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* can implement 'board_return_to_bootrom'.
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*/
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void board_return_to_bootrom(void);
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#endif
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