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 --- common/spl/spl_fit.c | 96 ++++++++++++++++++++++++++++++++++++++++++++++++++++ include/spl.h | 5 +++ 2 files changed, 101 insertions(+)
diff --git a/common/spl/spl_fit.c b/common/spl/spl_fit.c index 1a5c027..4c9fe7b 100644 --- a/common/spl/spl_fit.c +++ b/common/spl/spl_fit.c @@ -192,3 +192,99 @@ 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 node, images; + 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 = fdt_totalsize(fit); + size = (size + 3) & ~3; + base_offset = (size + 3) & ~3; + + /* + * 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; + + /* find the firmware image to load */ + images = fdt_path_offset(fit, FIT_IMAGES_PATH); + if (images < 0) { + printf("%s: Cannot find /images node: %d\n", __func__, images); + return -1; + } + node = fdt_first_subnode(fit, images); + if (node < 0) { + printf("%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; + + /* + * 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..276ca12 100644 --- a/include/spl.h +++ b/include/spl.h @@ -36,6 +36,7 @@ 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 + * @fd_read: Function to call to read from the a fs */ struct spl_load_info { void *dev; @@ -43,9 +44,13 @@ 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); };
int spl_load_simple_fit(struct spl_load_info *info, ulong sector, void *fdt); +int spl_fs_load_simple_fit(struct spl_load_info *info, const char *filename, + void *fit);
#define SPL_COPY_PAYLOAD_ONLY 1