This provides a way to load a FIT containing U-Boot and a selection of device tree files from a File system.
Signed-off-by: Lokesh Vutla lokeshvutla@ti.com --- Changes since v1: - Added comments for function declarations. - Bring out the common code for parsing fit header.
common/spl/spl_fit.c | 146 +++++++++++++++++++++++++++++++++++++++++++-------- include/spl.h | 31 +++++++++++ 2 files changed, 154 insertions(+), 23 deletions(-)
diff --git a/common/spl/spl_fit.c b/common/spl/spl_fit.c index 1a5c027..a4ab67e 100644 --- a/common/spl/spl_fit.c +++ b/common/spl/spl_fit.c @@ -82,12 +82,42 @@ static int spl_fit_select_fdt(const void *fdt, int images, int *fdt_offsetp) return -ENOENT; }
+#define get_fit_size(fit) ALIGN(fdt_totalsize(fit), 4) + +static int spl_parse_fit_header(void *fit) +{ + int node; + + spl_image.images = fdt_path_offset(fit, FIT_IMAGES_PATH); + if (spl_image.images < 0) { + debug("%s: Cannot find /images node: %d\n", __func__, + spl_image.images); + return -1; + } + node = fdt_first_subnode(fit, spl_image.images); + if (node < 0) { + debug("%s: Cannot find first image node: %d\n", __func__, node); + return -1; + } + + /* Get its information and set up the spl_image structure */ + spl_image.data_offset = fdt_getprop_u32(fit, node, "data-offset"); + spl_image.data_size = fdt_getprop_u32(fit, node, "data-size"); + spl_image.load_addr = fdt_getprop_u32(fit, node, "load"); + debug("data_offset=%x, data_size=%x\n", spl_image.data_offset, + spl_image.data_size); + spl_image.entry_point = spl_image.load_addr; + spl_image.os = IH_OS_U_BOOT; + + return 0; +} + int spl_load_simple_fit(struct spl_load_info *info, ulong sector, void *fit) { int sectors; ulong size, load; unsigned long count; - int node, images; + int images, ret; void *load_ptr; int fdt_offset, fdt_len; int data_offset, data_size; @@ -99,9 +129,8 @@ int spl_load_simple_fit(struct spl_load_info *info, ulong sector, void *fit) * Figure out where the external images start. This is the base for the * data-offset properties in each image. */ - size = fdt_totalsize(fit); - size = (size + 3) & ~3; - base_offset = (size + 3) & ~3; + size = get_fit_size(fit); + base_offset = size;
/* * So far we only have one block of data from the FIT. Read the entire @@ -125,26 +154,13 @@ int spl_load_simple_fit(struct spl_load_info *info, ulong sector, void *fit) if (count == 0) return -EIO;
- /* find the firmware image to load */ - images = fdt_path_offset(fit, FIT_IMAGES_PATH); - if (images < 0) { - debug("%s: Cannot find /images node: %d\n", __func__, images); + ret = spl_parse_fit_header(fit); + if (ret < 0) return -1; - } - node = fdt_first_subnode(fit, images); - if (node < 0) { - debug("%s: Cannot find first image node: %d\n", __func__, node); - return -1; - } - - /* Get its information and set up the spl_image structure */ - data_offset = fdt_getprop_u32(fit, node, "data-offset"); - data_size = fdt_getprop_u32(fit, node, "data-size"); - load = fdt_getprop_u32(fit, node, "load"); - debug("data_offset=%x, data_size=%x\n", data_offset, data_size); - spl_image.load_addr = load; - spl_image.entry_point = load; - spl_image.os = IH_OS_U_BOOT; + data_offset = spl_image.data_offset; + data_size = spl_image.data_size; + load = spl_image.load_addr; + images = spl_image.images;
/* * Work out where to place the image. We read it so that the first @@ -192,3 +208,87 @@ int spl_load_simple_fit(struct spl_load_info *info, ulong sector, void *fit)
return 0; } + +int spl_fs_load_simple_fit(struct spl_load_info *info, const char *filename, + void *fit) +{ + ulong size, load; + unsigned long count; + int images, ret; + void *load_ptr; + int fdt_offset, fdt_len; + int data_offset, data_size, file_offset; + int base_offset = 0, align_len; + void *dst; + + /* + * Figure out where the external images start. This is the base for the + * data-offset properties in each image. + */ + size = get_fit_size(fit); + base_offset = size; + + /* + * Read the entire FIT header, placing it so it finishes before + * where we will load the image. Also the load address is aligned + * ARCH_DMA_MINALIGN. + */ + align_len = ARCH_DMA_MINALIGN - 1; + fit = (void *)((CONFIG_SYS_TEXT_BASE - size - align_len) & ~align_len); + debug("FIT header read: destination = 0x%p, size = %lx\n", fit, size); + count = info->fs_read(info, filename, fit, 0, size); + if (count <= 0) + return -EIO; + + ret = spl_parse_fit_header(fit); + if (ret < 0) + return -1; + data_offset = spl_image.data_offset; + data_size = spl_image.data_size; + load = spl_image.load_addr; + images = spl_image.images; + + /* + * Work out where to place the image. Assuming load addr of u-boot.bin + * is always aligned to ARCH_DMA_MINALIGN. It is possible that file + * offset is not aligned. In order to make sure that the file read is + * dma aligned, align the file offset to dma with extra bytes in the + * beginning. Then do a memcpy of image to dst. + */ + data_offset += base_offset; + file_offset = data_offset & ~align_len; + load_ptr = (void *)load; + dst = load_ptr; + + /* Read the image */ + debug("Temp u-boot.bin read from fit: dst = 0x%p, file offset = 0x%x, size = 0x%x\n", + dst, file_offset, data_size); + count = info->fs_read(info, filename, dst, file_offset, data_size); + if (count <= 0) + return -EIO; + debug("u-boot.bin load: dst = 0x%p, size = 0x%x\n", dst, data_size); + memcpy(dst, dst + (data_offset & align_len), data_size); + + /* Figure out which device tree the board wants to use */ + fdt_len = spl_fit_select_fdt(fit, images, &fdt_offset); + if (fdt_len < 0) + return fdt_len; + + /* + * Read the device tree and place it after the image. Making sure that + * load addr and file offset are aligned to dma. + */ + dst = (void *)((load + data_size + align_len) & ~align_len); + fdt_offset += base_offset; + file_offset = fdt_offset & ~align_len; + debug("Temp fdt read from fit: dst = 0x%p, file offset = 0x%x, size = %d\n", + dst, file_offset, data_size); + count = info->fs_read(info, filename, dst, file_offset, data_size); + if (count <= 0) + return -EIO; + debug("fdt load: dst = 0x%p, size = 0x%x\n", load_ptr + data_size, + data_size); + memcpy(load_ptr + data_size, dst + (fdt_offset & align_len), data_size); + + return 1; +} diff --git a/include/spl.h b/include/spl.h index de4f70a..5f0b0db 100644 --- a/include/spl.h +++ b/include/spl.h @@ -27,6 +27,11 @@ struct spl_image_info { u32 entry_point; u32 size; u32 flags; +#ifdef CONFIG_SPL_LOAD_FIT + int data_offset; + int data_size; + int images; +#endif };
/* @@ -36,6 +41,7 @@ struct spl_image_info { * @priv: Private data for the device * @bl_len: Block length for reading in bytes * @read: Function to call to read from the device + * @fs_read: Function to call to read from a fs */ struct spl_load_info { void *dev; @@ -43,10 +49,35 @@ struct spl_load_info { int bl_len; ulong (*read)(struct spl_load_info *load, ulong sector, ulong count, void *buf); + int (*fs_read)(struct spl_load_info *load, const char *filename, + void *buf, ulong file_offset, ulong size); };
+/** + * 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);
+/** + * spl_fs_load_simple_fit() - Loads a fit image from a file system. + * @info: Structure containing the information required to load data. + * @filename: Name of the FIT image in the file system. + * @fit: Pointer to the copied FIT header. + * + * Reads the FIT image in the filesystem. Loads u-boot image to + * specified load address and copies the dtb to end of u-boot image. + * Returns 1 on success. + */ +int spl_fs_load_simple_fit(struct spl_load_info *info, const char *filename, + void *fit); + #define SPL_COPY_PAYLOAD_ONLY 1
extern struct spl_image_info spl_image;