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- int nand_spl_load_image(uint32_t offs, unsigned int size, void *dst)
- {
- unsigned int block, lastblock;
- unsigned int page, page_offset;
- /* offs has to be aligned to a page address! */
- block = offs / CONFIG_SYS_NAND_BLOCK_SIZE;
- lastblock = (offs + size - 1) / CONFIG_SYS_NAND_BLOCK_SIZE;
- page = (offs % CONFIG_SYS_NAND_BLOCK_SIZE) / CONFIG_SYS_NAND_PAGE_SIZE;
- page_offset = offs % CONFIG_SYS_NAND_PAGE_SIZE;
- while (block <= lastblock) {
- if (!nand_is_bad_block(block)) {
- /* Skip bad blocks */
- while (page < CONFIG_SYS_NAND_PAGE_COUNT) {
- nand_read_page(block, page, dst);
- /*
- * When offs is not aligned to page address the
- * extra offset is copied to dst as well. Copy
- * the image such that its first byte will be
- * at the dst.
- */
- if (unlikely(page_offset)) {
- memmove(dst, dst + page_offset,
- CONFIG_SYS_NAND_PAGE_SIZE);
- dst = (void *)((int)dst - page_offset);
- page_offset = 0;
- }
- dst += CONFIG_SYS_NAND_PAGE_SIZE;
- page++;
- }
- page = 0;
- } else {
- lastblock++;
- }
- block++;
- }
- return 0;
- }
- #ifdef CONFIG_SPL_UBI
- /*
- * Temporary storage for non NAND page aligned and non NAND page sized
- * reads. Note: This does not support runtime detected FLASH yet, but
- * that should be reasonably easy to fix by making the buffer large
- * enough :)
- */
- static u8 scratch_buf[CONFIG_SYS_NAND_PAGE_SIZE];
- /**
- * nand_spl_read_block - Read data from physical eraseblock into a buffer
- * @block: Number of the physical eraseblock
- * @offset: Data offset from the start of @peb
- * @len: Data size to read
- * @dst: Address of the destination buffer
- *
- * This could be further optimized if we'd have a subpage read
- * function in the simple code. On NAND which allows subpage reads
- * this would spare quite some time to readout e.g. the VID header of
- * UBI.
- *
- * Notes:
- * @offset + @len are not allowed to be larger than a physical
- * erase block. No sanity check done for simplicity reasons.
- *
- * To support runtime detected flash this needs to be extended by
- * information about the actual flash geometry, but thats beyond the
- * scope of this effort and for most applications where fast boot is
- * required it is not an issue anyway.
- */
- int nand_spl_read_block(int block, int offset, int len, void *dst)
- {
- int page, read;
- /* Calculate the page number */
- page = offset / CONFIG_SYS_NAND_PAGE_SIZE;
- /* Offset to the start of a flash page */
- offset = offset % CONFIG_SYS_NAND_PAGE_SIZE;
- while (len) {
- /*
- * Non page aligned reads go to the scratch buffer.
- * Page aligned reads go directly to the destination.
- */
- if (offset || len < CONFIG_SYS_NAND_PAGE_SIZE) {
- nand_read_page(block, page, scratch_buf);
- read = min(len, CONFIG_SYS_NAND_PAGE_SIZE - offset);
- memcpy(dst, scratch_buf + offset, read);
- offset = 0;
- } else {
- nand_read_page(block, page, dst);
- read = CONFIG_SYS_NAND_PAGE_SIZE;
- }
- page++;
- len -= read;
- dst += read;
- }
- return 0;
- }
- #endif
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