On 4.5.2016 14:04, Lokesh Vutla wrote:
This provides a way to load a FIT containing U-Boot and a selection of device tree files from a File system. Making sure that all the reads and writes are aligned to their respective needs.
Signed-off-by: Lokesh Vutla lokeshvutla@ti.com
common/spl/spl_fit.c | 76 +++++++++++++++++++++++++++++++++++++++++----------- include/spl.h | 10 +++++++ 2 files changed, 71 insertions(+), 15 deletions(-)
diff --git a/common/spl/spl_fit.c b/common/spl/spl_fit.c index b1cfa97..ace2543 100644 --- a/common/spl/spl_fit.c +++ b/common/spl/spl_fit.c @@ -82,6 +82,42 @@ static int spl_fit_select_fdt(const void *fdt, int images, int *fdt_offsetp) return -ENOENT; }
+static int get_aligned_image_offset(struct spl_load_info *info, int offset) +{
- /*
* If it is a FS read, get the first address before offset which is* aligned to ARCH_DMA_MINALIGN. If it is raw read return the* block number to which offset belongs.*/- if (info->priv)
return offset & ~(ARCH_DMA_MINALIGN - 1);- return offset / info->bl_len;
+}
+static int get_aligned_image_overhead(struct spl_load_info *info, int offset) +{
- /*
* If it is a FS read, get the difference between the offset and* the first address before offset which is aligned to* ARCH_DMA_MINALIGN. If it is raw read return the offset within the* block.*/- if (info->priv)
return offset & (ARCH_DMA_MINALIGN - 1);- return offset % info->bl_len;
+}
+static int get_aligned_image_size(struct spl_load_info *info, int data_size,
int offset)+{
- if (info->priv)
return data_size + get_aligned_image_overhead(info, offset);- return (data_size + info->bl_len - 1) / info->bl_len;
+}
int spl_load_simple_fit(struct spl_load_info *info, ulong sector, void *fit) { int sectors; @@ -91,7 +127,7 @@ int spl_load_simple_fit(struct spl_load_info *info, ulong sector, void *fit) void *load_ptr; int fdt_offset, fdt_len; int data_offset, data_size;
- int base_offset;
- int base_offset, align_len; int src_sector; void *dst;
@@ -117,8 +153,10 @@ int spl_load_simple_fit(struct spl_load_info *info, ulong sector, void *fit) * In fact the FIT has its own load address, but we assume it cannot * be before CONFIG_SYS_TEXT_BASE. */
- fit = (void *)(CONFIG_SYS_TEXT_BASE - size - info->bl_len);
- sectors = (size + info->bl_len - 1) / info->bl_len;
- align_len = ARCH_DMA_MINALIGN - 1;
- fit = (void *)((CONFIG_SYS_TEXT_BASE - size - info->bl_len -
align_len) & ~align_len);- sectors = get_aligned_image_size(info, size, 0); count = info->read(info, sector, sectors, fit); debug("fit read sector %lx, sectors=%d, dst=%p, count=%lu\n", sector, sectors, fit, count);
@@ -151,19 +189,23 @@ int spl_load_simple_fit(struct spl_load_info *info, ulong sector, void *fit) * byte will be at 'load'. This may mean we need to load it starting * before then, since we can only read whole blocks. */
- sectors = (data_size + info->bl_len - 1) / info->bl_len; data_offset += base_offset;
- sectors = get_aligned_image_size(info, data_size, data_offset); load_ptr = (void *)load; debug("U-Boot size %x, data %p\n", data_size, load_ptr);
- dst = load_ptr - (data_offset % info->bl_len);
dst = load_ptr;
/* Read the image */
- src_sector = sector + data_offset / info->bl_len;
- debug("image: data_offset=%x, dst=%p, src_sector=%x, sectors=%x\n",
data_offset, dst, src_sector, sectors);
src_sector = sector + get_aligned_image_offset(info, data_offset);
debug("Aligned image read: dst=%p, src_sector=%x, sectors=%x\n",
dst, src_sector, sectors);count = info->read(info, src_sector, sectors, dst); if (count != sectors) return -EIO;
debug("image: dst=%p, data_offset=%x, size=%x\n", dst, data_offset,
data_size);memcpy(dst, dst + get_aligned_image_overhead(info, data_offset),
data_size);/* Figure out which device tree the board wants to use */ fdt_len = spl_fit_select_fdt(fit, images, &fdt_offset);
@@ -173,14 +215,15 @@ int spl_load_simple_fit(struct spl_load_info *info, ulong sector, void *fit) /* * Read the device tree and place it after the image. There may be * some extra data before it since we can only read entire blocks.
* And also align the destination address to ARCH_DMA_MINALIGN.
- dst = load_ptr + data_size;
- dst = (void *)((load + data_size + align_len) & ~align_len); fdt_offset += base_offset;
- sectors = (fdt_len + info->bl_len - 1) / info->bl_len;
- count = info->read(info, sector + fdt_offset / info->bl_len, sectors,
dst);- debug("fit read %x sectors to %x, dst %p, data_offset %x\n",
sectors, spl_image.load_addr, dst, fdt_offset);
- sectors = get_aligned_image_size(info, fdt_len, fdt_offset);
- src_sector = sector + get_aligned_image_offset(info, fdt_offset);
- count = info->read(info, src_sector, sectors, dst);
- debug("Aligned fdt read: dst %p, src_sector = %x, sectors %x\n",
dst, src_sector, sectors);@@ -189,7 +232,10 @@ int spl_load_simple_fit(struct spl_load_info *info, ulong sector, void *fit) * After this we will have the U-Boot image and its device tree ready * for us to start. */
- memcpy(dst, dst + fdt_offset % info->bl_len, fdt_len);
debug("fdt: dst=%p, data_offset=%x, size=%x\n", dst, fdt_offset,
fdt_len);memcpy(load_ptr + data_size,
dst + get_aligned_image_overhead(info, fdt_offset), fdt_len);return 0;
} diff --git a/include/spl.h b/include/spl.h index de4f70a..358e81b 100644 --- a/include/spl.h +++ b/include/spl.h @@ -45,6 +45,16 @@ struct spl_load_info { void *buf); };
+/**
- 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);
#define SPL_COPY_PAYLOAD_ONLY 1
Tested-by: Michal Simek michal.simek@xilinx.com
Thanks, Michal