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authorDavid Howells <dhowells@redhat.com>2008-02-08 04:19:31 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-08 09:22:30 -0800
commitb920de1b77b72ca9432ac3f97edb26541e65e5dd (patch)
tree40fa9be1470e929c47927dea7eddf184c0204229 /arch/mn10300/boot/tools/build.c
parentef3d534754f31fed9c3b976fee1ece1b3bc38282 (diff)
downloadlinux-linaro-stable-b920de1b77b72ca9432ac3f97edb26541e65e5dd.tar.gz
mn10300: add the MN10300/AM33 architecture to the kernel
Add architecture support for the MN10300/AM33 CPUs produced by MEI to the kernel. This patch also adds board support for the ASB2303 with the ASB2308 daughter board, and the ASB2305. The only processor supported is the MN103E010, which is an AM33v2 core plus on-chip devices. [akpm@linux-foundation.org: nuke cvs control strings] Signed-off-by: Masakazu Urade <urade.masakazu@jp.panasonic.com> Signed-off-by: Koichi Yasutake <yasutake.koichi@jp.panasonic.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/mn10300/boot/tools/build.c')
-rw-r--r--arch/mn10300/boot/tools/build.c190
1 files changed, 190 insertions, 0 deletions
diff --git a/arch/mn10300/boot/tools/build.c b/arch/mn10300/boot/tools/build.c
new file mode 100644
index 000000000000..4f552ead0f8e
--- /dev/null
+++ b/arch/mn10300/boot/tools/build.c
@@ -0,0 +1,190 @@
+/*
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ * Copyright (C) 1997 Martin Mares
+ */
+
+/*
+ * This file builds a disk-image from three different files:
+ *
+ * - bootsect: exactly 512 bytes of 8086 machine code, loads the rest
+ * - setup: 8086 machine code, sets up system parm
+ * - system: 80386 code for actual system
+ *
+ * It does some checking that all files are of the correct type, and
+ * just writes the result to stdout, removing headers and padding to
+ * the right amount. It also writes some system data to stderr.
+ */
+
+/*
+ * Changes by tytso to allow root device specification
+ * High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996
+ * Cross compiling fixes by Gertjan van Wingerde, July 1996
+ * Rewritten by Martin Mares, April 1997
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/sysmacros.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <asm/boot.h>
+
+#define DEFAULT_MAJOR_ROOT 0
+#define DEFAULT_MINOR_ROOT 0
+
+/* Minimal number of setup sectors (see also bootsect.S) */
+#define SETUP_SECTS 4
+
+uint8_t buf[1024];
+int fd;
+int is_big_kernel;
+
+__attribute__((noreturn))
+void die(const char *str, ...)
+{
+ va_list args;
+ va_start(args, str);
+ vfprintf(stderr, str, args);
+ fputc('\n', stderr);
+ exit(1);
+}
+
+void file_open(const char *name)
+{
+ fd = open(name, O_RDONLY, 0);
+ if (fd < 0)
+ die("Unable to open `%s': %m", name);
+}
+
+__attribute__((noreturn))
+void usage(void)
+{
+ die("Usage: build [-b] bootsect setup system [rootdev] [> image]");
+}
+
+int main(int argc, char **argv)
+{
+ unsigned int i, c, sz, setup_sectors;
+ uint32_t sys_size;
+ uint8_t major_root, minor_root;
+ struct stat sb;
+
+ if (argc > 2 && !strcmp(argv[1], "-b")) {
+ is_big_kernel = 1;
+ argc--, argv++;
+ }
+ if ((argc < 4) || (argc > 5))
+ usage();
+ if (argc > 4) {
+ if (!strcmp(argv[4], "CURRENT")) {
+ if (stat("/", &sb)) {
+ perror("/");
+ die("Couldn't stat /");
+ }
+ major_root = major(sb.st_dev);
+ minor_root = minor(sb.st_dev);
+ } else if (strcmp(argv[4], "FLOPPY")) {
+ if (stat(argv[4], &sb)) {
+ perror(argv[4]);
+ die("Couldn't stat root device.");
+ }
+ major_root = major(sb.st_rdev);
+ minor_root = minor(sb.st_rdev);
+ } else {
+ major_root = 0;
+ minor_root = 0;
+ }
+ } else {
+ major_root = DEFAULT_MAJOR_ROOT;
+ minor_root = DEFAULT_MINOR_ROOT;
+ }
+ fprintf(stderr, "Root device is (%d, %d)\n", major_root, minor_root);
+
+ file_open(argv[1]);
+ i = read(fd, buf, sizeof(buf));
+ fprintf(stderr, "Boot sector %d bytes.\n", i);
+ if (i != 512)
+ die("Boot block must be exactly 512 bytes");
+ if (buf[510] != 0x55 || buf[511] != 0xaa)
+ die("Boot block hasn't got boot flag (0xAA55)");
+ buf[508] = minor_root;
+ buf[509] = major_root;
+ if (write(1, buf, 512) != 512)
+ die("Write call failed");
+ close(fd);
+
+ /* Copy the setup code */
+ file_open(argv[2]);
+ for (i = 0; (c = read(fd, buf, sizeof(buf))) > 0; i += c)
+ if (write(1, buf, c) != c)
+ die("Write call failed");
+ if (c != 0)
+ die("read-error on `setup'");
+ close(fd);
+
+ /* Pad unused space with zeros */
+ setup_sectors = (i + 511) / 512;
+ /* for compatibility with ancient versions of LILO. */
+ if (setup_sectors < SETUP_SECTS)
+ setup_sectors = SETUP_SECTS;
+ fprintf(stderr, "Setup is %d bytes.\n", i);
+ memset(buf, 0, sizeof(buf));
+ while (i < setup_sectors * 512) {
+ c = setup_sectors * 512 - i;
+ if (c > sizeof(buf))
+ c = sizeof(buf);
+ if (write(1, buf, c) != c)
+ die("Write call failed");
+ i += c;
+ }
+
+ file_open(argv[3]);
+ if (fstat(fd, &sb))
+ die("Unable to stat `%s': %m", argv[3]);
+ sz = sb.st_size;
+ fprintf(stderr, "System is %d kB\n", sz / 1024);
+ sys_size = (sz + 15) / 16;
+ /* 0x28000*16 = 2.5 MB, conservative estimate for the current maximum */
+ if (sys_size > (is_big_kernel ? 0x28000 : DEF_SYSSIZE))
+ die("System is too big. Try using %smodules.",
+ is_big_kernel ? "" : "bzImage or ");
+ if (sys_size > 0xffff)
+ fprintf(stderr,
+ "warning: kernel is too big for standalone boot "
+ "from floppy\n");
+ while (sz > 0) {
+ int l, n;
+
+ l = (sz > sizeof(buf)) ? sizeof(buf) : sz;
+ n = read(fd, buf, l);
+ if (n != l) {
+ if (n < 0)
+ die("Error reading %s: %m", argv[3]);
+ else
+ die("%s: Unexpected EOF", argv[3]);
+ }
+ if (write(1, buf, l) != l)
+ die("Write failed");
+ sz -= l;
+ }
+ close(fd);
+
+ /* Write sizes to the bootsector */
+ if (lseek(1, 497, SEEK_SET) != 497)
+ die("Output: seek failed");
+ buf[0] = setup_sectors;
+ if (write(1, buf, 1) != 1)
+ die("Write of setup sector count failed");
+ if (lseek(1, 500, SEEK_SET) != 500)
+ die("Output: seek failed");
+ buf[0] = (sys_size & 0xff);
+ buf[1] = ((sys_size >> 8) & 0xff);
+ if (write(1, buf, 2) != 2)
+ die("Write of image length failed");
+
+ return 0;
+}