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-rw-r--r--arch/sparc/boot/.gitignore9
-rw-r--r--arch/sparc/boot/Makefile76
-rw-r--r--arch/sparc/boot/install.sh50
-rw-r--r--arch/sparc/boot/piggyback.c261
4 files changed, 396 insertions, 0 deletions
diff --git a/arch/sparc/boot/.gitignore b/arch/sparc/boot/.gitignore
new file mode 100644
index 000000000..f3d8569a2
--- /dev/null
+++ b/arch/sparc/boot/.gitignore
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0-only
+btfix.S
+btfixupprep
+image
+zImage
+tftpboot.img
+vmlinux.aout
+piggyback
+
diff --git a/arch/sparc/boot/Makefile b/arch/sparc/boot/Makefile
new file mode 100644
index 000000000..380e2b018
--- /dev/null
+++ b/arch/sparc/boot/Makefile
@@ -0,0 +1,76 @@
+# SPDX-License-Identifier: GPL-2.0
+# Makefile for the Sparc boot stuff.
+#
+# Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+# Copyright (C) 1997,1998 Jakub Jelinek (jj@ultra.linux.cz)
+
+ROOT_IMG := /usr/src/root.img
+ELFTOAOUT := elftoaout
+
+hostprogs := piggyback
+targets := tftpboot.img image zImage vmlinux.aout
+clean-files := System.map
+
+quiet_cmd_elftoaout = ELFTOAOUT $@
+ cmd_elftoaout = $(ELFTOAOUT) $(obj)/image -o $@
+quiet_cmd_piggy = PIGGY $@
+ cmd_piggy = $(obj)/piggyback $(BITS) $@ System.map $(ROOT_IMG)
+quiet_cmd_strip = STRIP $@
+ cmd_strip = $(STRIP) -R .comment -R .note -K sun4u_init -K _end -K _start $< -o $@
+
+ifeq ($(CONFIG_SPARC64),y)
+
+# Actual linking
+
+$(obj)/zImage: $(obj)/image
+ $(call if_changed,gzip)
+ @echo ' kernel: $@ is ready'
+
+$(obj)/vmlinux.aout: vmlinux FORCE
+ $(call if_changed,elftoaout)
+ @echo ' kernel: $@ is ready'
+else
+
+$(obj)/zImage: $(obj)/image
+ $(call if_changed,strip)
+ @echo ' kernel: $@ is ready'
+
+# The following lines make a readable image for U-Boot.
+# uImage - Binary file read by U-boot
+# uImage.o - object file of uImage for loading with a
+# flash programmer understanding ELF.
+
+OBJCOPYFLAGS_image.bin := -S -O binary -R .note -R .comment
+$(obj)/image.bin: $(obj)/image FORCE
+ $(call if_changed,objcopy)
+
+$(obj)/image.gz: $(obj)/image.bin
+ $(call if_changed,gzip)
+
+UIMAGE_LOADADDR = $(CONFIG_UBOOT_LOAD_ADDR)
+UIMAGE_ENTRYADDR = $(CONFIG_UBOOT_ENTRY_ADDR)
+UIMAGE_COMPRESSION = gzip
+
+quiet_cmd_uimage.o = UIMAGE.O $@
+ cmd_uimage.o = $(LD) -Tdata $(CONFIG_UBOOT_FLASH_ADDR) \
+ -r -b binary $@ -o $@.o
+
+targets += uImage
+$(obj)/uImage: $(obj)/image.gz
+ $(call if_changed,uimage)
+ $(call if_changed,uimage.o)
+ @echo ' Image $@ is ready'
+
+endif
+
+$(obj)/image: vmlinux FORCE
+ $(call if_changed,strip)
+ @echo ' kernel: $@ is ready'
+
+$(obj)/tftpboot.img: $(obj)/image $(obj)/piggyback System.map $(ROOT_IMG) FORCE
+ $(call if_changed,elftoaout)
+ $(call if_changed,piggy)
+
+install:
+ sh $(srctree)/$(src)/install.sh $(KERNELRELEASE) $(obj)/zImage \
+ System.map "$(INSTALL_PATH)"
diff --git a/arch/sparc/boot/install.sh b/arch/sparc/boot/install.sh
new file mode 100644
index 000000000..b32851eae
--- /dev/null
+++ b/arch/sparc/boot/install.sh
@@ -0,0 +1,50 @@
+#!/bin/sh
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License. See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+# Copyright (C) 1995 by Linus Torvalds
+#
+# Adapted from code in arch/i386/boot/Makefile by H. Peter Anvin
+#
+# "make install" script for SPARC architecture
+#
+# Arguments:
+# $1 - kernel version
+# $2 - kernel image file
+# $3 - kernel map file
+# $4 - default install path (blank if root directory)
+#
+
+verify () {
+ if [ ! -f "$1" ]; then
+ echo "" 1>&2
+ echo " *** Missing file: $1" 1>&2
+ echo ' *** You need to run "make" before "make install".' 1>&2
+ echo "" 1>&2
+ exit 1
+ fi
+}
+
+# Make sure the files actually exist
+verify "$2"
+verify "$3"
+
+# User may have a custom install script
+
+if [ -x ~/bin/${INSTALLKERNEL} ]; then exec ~/bin/${INSTALLKERNEL} "$@"; fi
+if [ -x /sbin/${INSTALLKERNEL} ]; then exec /sbin/${INSTALLKERNEL} "$@"; fi
+
+# Default install - same as make zlilo
+
+if [ -f $4/vmlinuz ]; then
+ mv $4/vmlinuz $4/vmlinuz.old
+fi
+
+if [ -f $4/System.map ]; then
+ mv $4/System.map $4/System.old
+fi
+
+cat $2 > $4/vmlinuz
+cp $3 $4/System.map
diff --git a/arch/sparc/boot/piggyback.c b/arch/sparc/boot/piggyback.c
new file mode 100644
index 000000000..a7a38fb4e
--- /dev/null
+++ b/arch/sparc/boot/piggyback.c
@@ -0,0 +1,261 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ Simple utility to make a single-image install kernel with initial ramdisk
+ for Sparc tftpbooting without need to set up nfs.
+
+ Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ Pete Zaitcev <zaitcev@yahoo.com> endian fixes for cross-compiles, 2000.
+ Copyright (C) 2011 Sam Ravnborg <sam@ravnborg.org>
+
+ */
+
+#include <dirent.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+/*
+ * Note: run this on an a.out kernel (use elftoaout for it),
+ * as PROM looks for a.out image only.
+ */
+
+#define AOUT_TEXT_OFFSET 32
+
+static int is64bit = 0;
+
+/* align to power-of-two size */
+static int align(int n)
+{
+ if (is64bit)
+ return (n + 0x1fff) & ~0x1fff;
+ else
+ return (n + 0xfff) & ~0xfff;
+}
+
+/* read two bytes as big endian */
+static unsigned short ld2(char *p)
+{
+ return (p[0] << 8) | p[1];
+}
+
+/* save 4 bytes as big endian */
+static void st4(char *p, unsigned int x)
+{
+ p[0] = x >> 24;
+ p[1] = x >> 16;
+ p[2] = x >> 8;
+ p[3] = x;
+}
+
+static void die(const char *str)
+{
+ perror(str);
+ exit(1);
+}
+
+static void usage(void)
+{
+ /* fs_img.gz is an image of initial ramdisk. */
+ fprintf(stderr, "Usage: piggyback bits vmlinux.aout System.map fs_img.gz\n");
+ fprintf(stderr, "\tKernel image will be modified in place.\n");
+ exit(1);
+}
+
+static int start_line(const char *line)
+{
+ if (strcmp(line + 10, " _start\n") == 0)
+ return 1;
+ else if (strcmp(line + 18, " _start\n") == 0)
+ return 1;
+ return 0;
+}
+
+static int end_line(const char *line)
+{
+ if (strcmp(line + 10, " _end\n") == 0)
+ return 1;
+ else if (strcmp (line + 18, " _end\n") == 0)
+ return 1;
+ return 0;
+}
+
+/*
+ * Find address for start and end in System.map.
+ * The file looks like this:
+ * f0004000 ... _start
+ * f0379f79 ... _end
+ * 1234567890123456
+ * ^coloumn 1
+ * There is support for 64 bit addresses too.
+ *
+ * Return 0 if either start or end is not found
+ */
+static int get_start_end(const char *filename, unsigned int *start,
+ unsigned int *end)
+{
+ FILE *map;
+ char buffer[1024];
+
+ *start = 0;
+ *end = 0;
+ map = fopen(filename, "r");
+ if (!map)
+ die(filename);
+ while (fgets(buffer, 1024, map)) {
+ if (start_line(buffer))
+ *start = strtoul(buffer, NULL, 16);
+ else if (end_line(buffer))
+ *end = strtoul(buffer, NULL, 16);
+ }
+ fclose (map);
+
+ if (*start == 0 || *end == 0)
+ return 0;
+
+ return 1;
+}
+
+#define LOOKBACK (128 * 4)
+#define BUFSIZE 1024
+/*
+ * Find the HdrS entry from head_32/head_64.
+ * We check if it is at the beginning of the file (sparc64 case)
+ * and if not we search for it.
+ * When we search do so in steps of 4 as HdrS is on a 4-byte aligned
+ * address (it is on same alignment as sparc instructions)
+ * Return the offset to the HdrS entry (as off_t)
+ */
+static off_t get_hdrs_offset(int kernelfd, const char *filename)
+{
+ char buffer[BUFSIZE];
+ off_t offset;
+ int i;
+
+ if (lseek(kernelfd, 0, SEEK_SET) < 0)
+ die("lseek");
+ if (read(kernelfd, buffer, BUFSIZE) != BUFSIZE)
+ die(filename);
+
+ if (buffer[40] == 'H' && buffer[41] == 'd' &&
+ buffer[42] == 'r' && buffer[43] == 'S') {
+ return 40;
+ } else {
+ /* Find the gokernel label */
+ /* Decode offset from branch instruction */
+ offset = ld2(buffer + AOUT_TEXT_OFFSET + 2) << 2;
+ /* Go back 512 bytes so we do not miss HdrS */
+ offset -= LOOKBACK;
+ /* skip a.out header */
+ offset += AOUT_TEXT_OFFSET;
+ if (lseek(kernelfd, offset, SEEK_SET) < 0)
+ die("lseek");
+ if (read(kernelfd, buffer, BUFSIZE) != BUFSIZE)
+ die(filename);
+
+ for (i = 0; i < LOOKBACK; i += 4) {
+ if (buffer[i + 0] == 'H' && buffer[i + 1] == 'd' &&
+ buffer[i + 2] == 'r' && buffer[i + 3] == 'S') {
+ return offset + i;
+ }
+ }
+ }
+ fprintf (stderr, "Couldn't find headers signature in %s\n", filename);
+ exit(1);
+}
+
+int main(int argc,char **argv)
+{
+ static char aout_magic[] = { 0x01, 0x03, 0x01, 0x07 };
+ char buffer[1024];
+ unsigned int i, start, end;
+ off_t offset;
+ struct stat s;
+ int image, tail;
+
+ if (argc != 5)
+ usage();
+ if (strcmp(argv[1], "64") == 0)
+ is64bit = 1;
+ if (stat (argv[4], &s) < 0)
+ die(argv[4]);
+
+ if (!get_start_end(argv[3], &start, &end)) {
+ fprintf(stderr, "Could not determine start and end from %s\n",
+ argv[3]);
+ exit(1);
+ }
+ if ((image = open(argv[2], O_RDWR)) < 0)
+ die(argv[2]);
+ if (read(image, buffer, 512) != 512)
+ die(argv[2]);
+ if (memcmp(buffer, aout_magic, 4) != 0) {
+ fprintf (stderr, "Not a.out. Don't blame me.\n");
+ exit(1);
+ }
+ /*
+ * We need to fill in values for
+ * sparc_ramdisk_image + sparc_ramdisk_size
+ * To locate these symbols search for the "HdrS" text which appear
+ * in the image a little before the gokernel symbol.
+ * See definition of these in init_32.S
+ */
+
+ offset = get_hdrs_offset(image, argv[2]);
+ /* skip HdrS + LINUX_VERSION_CODE + HdrS version */
+ offset += 10;
+
+ if (lseek(image, offset, 0) < 0)
+ die("lseek");
+
+ /*
+ * root_flags = 0
+ * root_dev = 1 (RAMDISK_MAJOR)
+ * ram_flags = 0
+ * sparc_ramdisk_image = "PAGE aligned address after _end")
+ * sparc_ramdisk_size = size of image
+ */
+ st4(buffer, 0);
+ st4(buffer + 4, 0x01000000);
+ st4(buffer + 8, align(end + 32));
+ st4(buffer + 12, s.st_size);
+
+ if (write(image, buffer + 2, 14) != 14)
+ die(argv[2]);
+
+ /* For sparc64 update a_text and clear a_data + a_bss */
+ if (is64bit)
+ {
+ if (lseek(image, 4, 0) < 0)
+ die("lseek");
+ /* a_text */
+ st4(buffer, align(end + 32 + 8191) - (start & ~0x3fffffUL) +
+ s.st_size);
+ /* a_data */
+ st4(buffer + 4, 0);
+ /* a_bss */
+ st4(buffer + 8, 0);
+ if (write(image, buffer, 12) != 12)
+ die(argv[2]);
+ }
+
+ /* seek page aligned boundary in the image file and add boot image */
+ if (lseek(image, AOUT_TEXT_OFFSET - start + align(end + 32), 0) < 0)
+ die("lseek");
+ if ((tail = open(argv[4], O_RDONLY)) < 0)
+ die(argv[4]);
+ while ((i = read(tail, buffer, 1024)) > 0)
+ if (write(image, buffer, i) != i)
+ die(argv[2]);
+ if (close(image) < 0)
+ die("close");
+ if (close(tail) < 0)
+ die("close");
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 07:29:17 +0000