2016-02-23 05:55:56 +00:00
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/*
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* Copyright (C) 2016 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <errno.h>
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#include <image.h>
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#include <libfdt.h>
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#include <spl.h>
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static ulong fdt_getprop_u32(const void *fdt, int node, const char *prop)
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{
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const u32 *cell;
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int len;
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cell = fdt_getprop(fdt, node, prop, &len);
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if (len != sizeof(*cell))
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return -1U;
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return fdt32_to_cpu(*cell);
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}
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static int spl_fit_select_fdt(const void *fdt, int images, int *fdt_offsetp)
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{
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const char *name, *fdt_name;
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int conf, node, fdt_node;
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int len;
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*fdt_offsetp = 0;
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conf = fdt_path_offset(fdt, FIT_CONFS_PATH);
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if (conf < 0) {
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debug("%s: Cannot find /configurations node: %d\n", __func__,
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conf);
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return -EINVAL;
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}
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for (node = fdt_first_subnode(fdt, conf);
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node >= 0;
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node = fdt_next_subnode(fdt, node)) {
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name = fdt_getprop(fdt, node, "description", &len);
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2016-05-04 13:08:00 +00:00
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if (!name) {
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#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
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printf("%s: Missing FDT description in DTB\n",
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__func__);
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#endif
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2016-02-23 05:55:56 +00:00
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return -EINVAL;
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2016-05-04 13:08:00 +00:00
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}
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2016-02-23 05:55:56 +00:00
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if (board_fit_config_name_match(name))
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continue;
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debug("Selecting config '%s'", name);
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fdt_name = fdt_getprop(fdt, node, FIT_FDT_PROP, &len);
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if (!fdt_name) {
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debug("%s: Cannot find fdt name property: %d\n",
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__func__, len);
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return -EINVAL;
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}
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debug(", fdt '%s'\n", fdt_name);
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fdt_node = fdt_subnode_offset(fdt, images, fdt_name);
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if (fdt_node < 0) {
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debug("%s: Cannot find fdt node '%s': %d\n",
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__func__, fdt_name, fdt_node);
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return -EINVAL;
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}
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*fdt_offsetp = fdt_getprop_u32(fdt, fdt_node, "data-offset");
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len = fdt_getprop_u32(fdt, fdt_node, "data-size");
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2016-05-24 05:04:43 +00:00
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debug("FIT: Selected '%s'\n", name);
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2016-02-23 05:55:56 +00:00
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return len;
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}
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#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
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printf("No matching DT out of these options:\n");
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for (node = fdt_first_subnode(fdt, conf);
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node >= 0;
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node = fdt_next_subnode(fdt, node)) {
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name = fdt_getprop(fdt, node, "name", &len);
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printf(" %s\n", name);
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}
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#endif
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return -ENOENT;
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}
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2016-05-24 05:04:38 +00:00
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static int get_aligned_image_offset(struct spl_load_info *info, int offset)
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{
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/*
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* If it is a FS read, get the first address before offset which is
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* aligned to ARCH_DMA_MINALIGN. If it is raw read return the
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* block number to which offset belongs.
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*/
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if (info->filename)
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return offset & ~(ARCH_DMA_MINALIGN - 1);
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return offset / info->bl_len;
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}
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static int get_aligned_image_overhead(struct spl_load_info *info, int offset)
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{
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/*
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* If it is a FS read, get the difference between the offset and
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* the first address before offset which is aligned to
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* ARCH_DMA_MINALIGN. If it is raw read return the offset within the
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* block.
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*/
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if (info->filename)
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return offset & (ARCH_DMA_MINALIGN - 1);
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return offset % info->bl_len;
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}
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static int get_aligned_image_size(struct spl_load_info *info, int data_size,
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int offset)
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{
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if (info->filename)
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return data_size + get_aligned_image_overhead(info, offset);
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return (data_size + info->bl_len - 1) / info->bl_len;
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}
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2016-02-23 05:55:56 +00:00
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int spl_load_simple_fit(struct spl_load_info *info, ulong sector, void *fit)
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{
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int sectors;
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ulong size, load;
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unsigned long count;
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int node, images;
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void *load_ptr;
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int fdt_offset, fdt_len;
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int data_offset, data_size;
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2016-05-24 05:04:38 +00:00
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int base_offset, align_len = ARCH_DMA_MINALIGN - 1;
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2016-02-23 05:55:56 +00:00
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int src_sector;
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void *dst;
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/*
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* Figure out where the external images start. This is the base for the
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* data-offset properties in each image.
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*/
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size = fdt_totalsize(fit);
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size = (size + 3) & ~3;
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base_offset = (size + 3) & ~3;
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/*
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* So far we only have one block of data from the FIT. Read the entire
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* thing, including that first block, placing it so it finishes before
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* where we will load the image.
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*
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* Note that we will load the image such that its first byte will be
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* at the load address. Since that byte may be part-way through a
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* block, we may load the image up to one block before the load
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* address. So take account of that here by subtracting an addition
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* block length from the FIT start position.
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*
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* In fact the FIT has its own load address, but we assume it cannot
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* be before CONFIG_SYS_TEXT_BASE.
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*/
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fit = (void *)(CONFIG_SYS_TEXT_BASE - size - info->bl_len);
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2016-04-28 08:36:11 +00:00
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fit = (void *)ALIGN((ulong)fit, 8);
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2016-05-24 05:04:38 +00:00
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sectors = get_aligned_image_size(info, size, 0);
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2016-02-23 05:55:56 +00:00
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count = info->read(info, sector, sectors, fit);
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debug("fit read sector %lx, sectors=%d, dst=%p, count=%lu\n",
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sector, sectors, fit, count);
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if (count == 0)
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return -EIO;
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/* find the firmware image to load */
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images = fdt_path_offset(fit, FIT_IMAGES_PATH);
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if (images < 0) {
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debug("%s: Cannot find /images node: %d\n", __func__, images);
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return -1;
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}
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node = fdt_first_subnode(fit, images);
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if (node < 0) {
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debug("%s: Cannot find first image node: %d\n", __func__, node);
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return -1;
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}
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/* Get its information and set up the spl_image structure */
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data_offset = fdt_getprop_u32(fit, node, "data-offset");
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data_size = fdt_getprop_u32(fit, node, "data-size");
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load = fdt_getprop_u32(fit, node, "load");
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debug("data_offset=%x, data_size=%x\n", data_offset, data_size);
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spl_image.load_addr = load;
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spl_image.entry_point = load;
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spl_image.os = IH_OS_U_BOOT;
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/*
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* Work out where to place the image. We read it so that the first
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* byte will be at 'load'. This may mean we need to load it starting
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* before then, since we can only read whole blocks.
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*/
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data_offset += base_offset;
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2016-05-24 05:04:38 +00:00
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sectors = get_aligned_image_size(info, data_size, data_offset);
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2016-02-23 05:55:56 +00:00
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load_ptr = (void *)load;
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debug("U-Boot size %x, data %p\n", data_size, load_ptr);
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2016-05-24 05:04:38 +00:00
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dst = load_ptr;
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2016-02-23 05:55:56 +00:00
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/* Read the image */
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2016-05-24 05:04:38 +00:00
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src_sector = sector + get_aligned_image_offset(info, data_offset);
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debug("Aligned image read: dst=%p, src_sector=%x, sectors=%x\n",
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dst, src_sector, sectors);
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2016-02-23 05:55:56 +00:00
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count = info->read(info, src_sector, sectors, dst);
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if (count != sectors)
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return -EIO;
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2016-05-24 05:04:38 +00:00
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debug("image: dst=%p, data_offset=%x, size=%x\n", dst, data_offset,
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data_size);
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memcpy(dst, dst + get_aligned_image_overhead(info, data_offset),
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data_size);
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2016-02-23 05:55:56 +00:00
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/* Figure out which device tree the board wants to use */
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fdt_len = spl_fit_select_fdt(fit, images, &fdt_offset);
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if (fdt_len < 0)
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return fdt_len;
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/*
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* Read the device tree and place it after the image. There may be
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* some extra data before it since we can only read entire blocks.
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2016-05-24 05:04:38 +00:00
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* And also align the destination address to ARCH_DMA_MINALIGN.
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2016-02-23 05:55:56 +00:00
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*/
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2016-05-24 05:04:38 +00:00
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dst = (void *)((load + data_size + align_len) & ~align_len);
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2016-02-23 05:55:56 +00:00
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fdt_offset += base_offset;
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2016-05-24 05:04:38 +00:00
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sectors = get_aligned_image_size(info, fdt_len, fdt_offset);
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src_sector = sector + get_aligned_image_offset(info, fdt_offset);
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count = info->read(info, src_sector, sectors, dst);
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debug("Aligned fdt read: dst %p, src_sector = %x, sectors %x\n",
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dst, src_sector, sectors);
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2016-02-23 05:55:56 +00:00
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if (count != sectors)
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return -EIO;
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/*
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* Copy the device tree so that it starts immediately after the image.
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* After this we will have the U-Boot image and its device tree ready
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* for us to start.
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*/
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2016-05-24 05:04:38 +00:00
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debug("fdt: dst=%p, data_offset=%x, size=%x\n", dst, fdt_offset,
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fdt_len);
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memcpy(load_ptr + data_size,
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dst + get_aligned_image_overhead(info, fdt_offset), fdt_len);
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2016-02-23 05:55:56 +00:00
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return 0;
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}
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