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Documentation: Remove ZBOOT MMC/SDHI utility and docs
Remove ZBOOT MMC/SDHI Documentation for sh7372 together wit the vrl4 utility. Without sh7372 and Mackerel support these files are no longer useful. Signed-off-by: Magnus Damm <damm+renesas@opensource.se> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
This commit is contained in:
Magnus Damm
Simon Horman
parent
edf4100906
commit
c6535e1e03
6 changed files with 1 additions and 250 deletions
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@ -1,4 +1,4 @@
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subdir-y := accounting arm auxdisplay blackfin connector \
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subdir-y := accounting auxdisplay blackfin connector \
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filesystems filesystems ia64 laptops mic misc-devices \
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networking pcmcia prctl ptp spi timers vDSO video4linux \
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watchdog
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@ -1 +0,0 @@
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subdir-y := SH-Mobile
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@ -1,7 +0,0 @@
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# List of programs to build
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hostprogs-y := vrl4
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# Tell kbuild to always build the programs
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always := $(hostprogs-y)
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HOSTCFLAGS_vrl4.o += -I$(objtree)/usr/include -I$(srctree)/tools/include
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@ -1,170 +0,0 @@
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/*
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* vrl4 format generator
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*
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* Copyright (C) 2010 Simon Horman
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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/*
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* usage: vrl4 < zImage > out
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* dd if=out of=/dev/sdx bs=512 seek=1 # Write the image to sector 1
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*
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* Reads a zImage from stdin and writes a vrl4 image to stdout.
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* In practice this means writing a padded vrl4 header to stdout followed
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* by the zImage.
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*
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* The padding places the zImage at ALIGN bytes into the output.
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* The vrl4 uses ALIGN + START_BASE as the start_address.
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* This is where the mask ROM will jump to after verifying the header.
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*
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* The header sets copy_size to min(sizeof(zImage), MAX_BOOT_PROG_LEN) + ALIGN.
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* That is, the mask ROM will load the padded header (ALIGN bytes)
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* And then MAX_BOOT_PROG_LEN bytes of the image, or the entire image,
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* whichever is smaller.
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*
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* The zImage is not modified in any way.
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*/
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#define _BSD_SOURCE
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#include <endian.h>
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#include <unistd.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <errno.h>
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#include <tools/endian.h>
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struct hdr {
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uint32_t magic1;
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uint32_t reserved1;
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uint32_t magic2;
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uint32_t reserved2;
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uint16_t copy_size;
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uint16_t boot_options;
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uint32_t reserved3;
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uint32_t start_address;
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uint32_t reserved4;
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uint32_t reserved5;
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char reserved6[308];
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};
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#define DECLARE_HDR(h) \
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struct hdr (h) = { \
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.magic1 = htole32(0xea000000), \
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.reserved1 = htole32(0x56), \
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.magic2 = htole32(0xe59ff008), \
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.reserved3 = htole16(0x1) }
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/* Align to 512 bytes, the MMCIF sector size */
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#define ALIGN_BITS 9
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#define ALIGN (1 << ALIGN_BITS)
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#define START_BASE 0xe55b0000
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/*
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* With an alignment of 512 the header uses the first sector.
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* There is a 128 sector (64kbyte) limit on the data loaded by the mask ROM.
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* So there are 127 sectors left for the boot programme. But in practice
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* Only a small portion of a zImage is needed, 16 sectors should be more
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* than enough.
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*
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* Note that this sets how much of the zImage is copied by the mask ROM.
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* The entire zImage is present after the header and is loaded
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* by the code in the boot program (which is the first portion of the zImage).
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*/
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#define MAX_BOOT_PROG_LEN (16 * 512)
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#define ROUND_UP(x) ((x + ALIGN - 1) & ~(ALIGN - 1))
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static ssize_t do_read(int fd, void *buf, size_t count)
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{
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size_t offset = 0;
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ssize_t l;
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while (offset < count) {
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l = read(fd, buf + offset, count - offset);
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if (!l)
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break;
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if (l < 0) {
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if (errno == EAGAIN || errno == EWOULDBLOCK)
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continue;
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perror("read");
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return -1;
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}
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offset += l;
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}
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return offset;
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}
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static ssize_t do_write(int fd, const void *buf, size_t count)
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{
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size_t offset = 0;
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ssize_t l;
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while (offset < count) {
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l = write(fd, buf + offset, count - offset);
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if (l < 0) {
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if (errno == EAGAIN || errno == EWOULDBLOCK)
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continue;
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perror("write");
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return -1;
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}
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offset += l;
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}
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return offset;
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}
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static ssize_t write_zero(int fd, size_t len)
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{
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size_t i = len;
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while (i--) {
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const char x = 0;
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if (do_write(fd, &x, 1) < 0)
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return -1;
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}
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return len;
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}
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int main(void)
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{
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DECLARE_HDR(hdr);
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char boot_program[MAX_BOOT_PROG_LEN];
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size_t aligned_hdr_len, alligned_prog_len;
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ssize_t prog_len;
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prog_len = do_read(0, boot_program, sizeof(boot_program));
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if (prog_len <= 0)
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return -1;
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aligned_hdr_len = ROUND_UP(sizeof(hdr));
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hdr.start_address = htole32(START_BASE + aligned_hdr_len);
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alligned_prog_len = ROUND_UP(prog_len);
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hdr.copy_size = htole16(aligned_hdr_len + alligned_prog_len);
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if (do_write(1, &hdr, sizeof(hdr)) < 0)
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return -1;
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if (write_zero(1, aligned_hdr_len - sizeof(hdr)) < 0)
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return -1;
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if (do_write(1, boot_program, prog_len) < 0)
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return 1;
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/* Write out the rest of the kernel */
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while (1) {
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prog_len = do_read(0, boot_program, sizeof(boot_program));
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if (prog_len < 0)
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return 1;
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if (prog_len == 0)
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break;
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if (do_write(1, boot_program, prog_len) < 0)
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return 1;
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}
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return 0;
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}
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@ -1,29 +0,0 @@
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ROM-able zImage boot from MMC
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-----------------------------
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An ROM-able zImage compiled with ZBOOT_ROM_MMCIF may be written to MMC and
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SuperH Mobile ARM will to boot directly from the MMCIF hardware block.
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This is achieved by the mask ROM loading the first portion of the image into
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MERAM and then jumping to it. This portion contains loader code which
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copies the entire image to SDRAM and jumps to it. From there the zImage
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boot code proceeds as normal, uncompressing the image into its final
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location and then jumping to it.
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This code has been tested on an AP4EB board using the developer 1A eMMC
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boot mode which is configured using the following jumper settings.
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The board used for testing required a patched mask ROM in order for
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this mode to function.
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8 7 6 5 4 3 2 1
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x|x|x|x|x| |x|
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S4 -+-+-+-+-+-+-+-
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| | | | |x| |x on
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The zImage must be written to the MMC card at sector 1 (512 bytes) in
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vrl4 format. A utility vrl4 is supplied to accomplish this.
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e.g.
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vrl4 < zImage | dd of=/dev/sdX bs=512 seek=1
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A dual-voltage MMC 4.0 card was used for testing.
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@ -1,42 +0,0 @@
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ROM-able zImage boot from eSD
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-----------------------------
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An ROM-able zImage compiled with ZBOOT_ROM_SDHI may be written to eSD and
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SuperH Mobile ARM will to boot directly from the SDHI hardware block.
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This is achieved by the mask ROM loading the first portion of the image into
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MERAM and then jumping to it. This portion contains loader code which
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copies the entire image to SDRAM and jumps to it. From there the zImage
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boot code proceeds as normal, uncompressing the image into its final
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location and then jumping to it.
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This code has been tested on an mackerel board using the developer 1A eSD
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boot mode which is configured using the following jumper settings.
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8 7 6 5 4 3 2 1
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x|x|x|x| |x|x|
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S4 -+-+-+-+-+-+-+-
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The eSD card needs to be present in SDHI slot 1 (CN7).
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As such S1 and S33 also need to be configured as per
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the notes in arch/arm/mach-shmobile/board-mackerel.c.
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A partial zImage must be written to physical partition #1 (boot)
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of the eSD at sector 0 in vrl4 format. A utility vrl4 is supplied to
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accomplish this.
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e.g.
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vrl4 < zImage | dd of=/dev/sdX bs=512 count=17
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A full copy of _the same_ zImage should be written to physical partition #1
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(boot) of the eSD at sector 0. This should _not_ be in vrl4 format.
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vrl4 < zImage | dd of=/dev/sdX bs=512
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Note: The commands above assume that the physical partition has been
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switched. No such facility currently exists in the Linux Kernel.
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Physical partitions are described in the eSD specification. At the time of
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writing they are not the same as partitions that are typically configured
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using fdisk and visible through /proc/partitions
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