kexec-tools: Add sh support

Patch found on 
http://eggplant.ddo.jp/www/download/debian26/source/kexec-tools/kexec-tools_1.101-2sh.diff.gz

According to Paul Mundt <lethal@linux-sh.org> it was originally by
kogiidena <kogiidena@eggplant.ddo.jp>

Signed-off-by: Simon Horman <horms@verge.net.au>
Acked-by: Magnus Damm <magnus.damm@gmail.com>

1 files changed, 166 insertions, 0 deletions

diff --git a/kexec/arch/sh/kexec-sh.c b/kexec/arch/sh/kexec-sh.c
new file mode 100644
index 0000000..6b485d1
--- /dev/null
+++ b/kexec/arch/sh/kexec-sh.c
@@ -0,0 +1,166 @@
+/*
+ * kexec-sh.c - kexec for the SH
+ * Copyright (C) 2004 kogiidena@eggplant.ddo.jp
+ *
+ * This source code is licensed under the GNU General Public License,
+ * Version 2.  See the file COPYING for more details.
+ */
+
+#define _GNU_SOURCE
+#include <stddef.h>
+#include <stdio.h>
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <sys/utsname.h>
+#include "../../kexec.h"
+#include "../../kexec-syscall.h"
+#include "kexec-sh.h"
+#include <arch/options.h>
+
+#define MAX_MEMORY_RANGES 64
+#define MAX_LINE 160
+static struct memory_range memory_range[MAX_MEMORY_RANGES];
+
+/* Return a sorted list of available memory ranges. */
+int get_memory_ranges(struct memory_range **range, int *ranges)
+{
+	int memory_ranges;
+
+	memory_ranges = 0;
+	memory_range[memory_ranges].start = 0x08000000;
+	memory_range[memory_ranges].end   = 0x10000000;
+	memory_range[memory_ranges].type  = RANGE_RAM;
+	memory_ranges++;
+	*range = memory_range;
+	*ranges = memory_ranges;
+	return 0;
+}
+
+/* Supported file types and callbacks */
+struct file_type file_type[] = {
+       {"zImage-sh", zImage_sh_probe, zImage_sh_load, zImage_sh_usage},
+       {"netbsd-sh", netbsd_sh_probe, netbsd_sh_load, netbsd_sh_usage},
+};
+int file_types = sizeof(file_type) / sizeof(file_type[0]);
+
+
+void arch_usage(void)
+{
+
+  printf(
+    " none\n\n"
+    "Default options:\n"
+    " --append=\"%s\"\n"
+    " --empty-zero=0x%08x\n\n"
+    " STRING of --appned is set form /proc/cmdline as default.\n"
+    " ADDRESS of --empty-zero can be set SHELL environment variable\n"
+    " KEXEC_EMPTY_ZERO as default.\n\n" 
+    " ADDRESS can be get in the following method in your system. \n"
+    " 1) \"grep empty_zero /proc/kallsyms\". \n"
+    " 2) \"grep empty_zero System.map\". \n"
+    " 3) CONFIG_MEMORY_START + CONFIG_ZERO_PAGE_OFFSET in your kernel\n"
+    "    config file.\n"
+    ,get_append(), (unsigned int) get_empty_zero(NULL));
+
+}
+
+static struct {
+} arch_options = {
+};
+int arch_process_options(int argc, char **argv)
+{
+	static const struct option options[] = {
+		KEXEC_ARCH_OPTIONS
+		{ 0, 			0, NULL, 0 },
+	};
+	static const char short_options[] = KEXEC_ARCH_OPT_STR;
+	int opt;
+
+	opterr = 0; /* Don't complain about unrecognized options here */
+	while((opt = getopt_long(argc, argv, short_options, options, 0)) != -1) {
+		switch(opt) {
+		default:
+			/* Ignore core options */
+			if (opt < OPT_MAX) {
+				break;
+			}
+		case '?':
+		        usage();
+		  	return -1;
+		case OPT_APPEND:	
+		case OPT_NBSD_HOWTO:	
+		case OPT_NBSD_MROOT:	
+		  ;
+		}
+	}
+	/* Reset getopt for the next pass; called in other source modules */
+	opterr = 1;
+	optind = 1;
+	return 0;
+}
+
+int arch_compat_trampoline(struct kexec_info *info, unsigned long *flags)
+{
+	int result;
+	struct utsname utsname;
+	result = uname(&utsname);
+	if (result < 0) {
+		fprintf(stderr, "uname failed: %s\n",
+			strerror(errno));
+		return -1;
+	}
+	if (	(strcmp(utsname.machine, "sh3") == 0) ||
+		(strcmp(utsname.machine, "sh4") == 0)) 
+
+	{
+		/* For compatibility with older patches 
+		 * use KEXEC_ARCH_DEFAULT instead of KEXEC_ARCH_IA64 here.
+		 */
+		*flags |= KEXEC_ARCH_DEFAULT;
+	}
+	else {
+		fprintf(stderr, "Unsupported machine type: %s\n",
+			utsname.machine);
+		return -1;
+	}
+	return 0;
+}
+
+void arch_update_purgatory(struct kexec_info *info)
+{
+}
+
+
+unsigned long get_empty_zero(char *s)
+{
+        char *env;
+
+	env = getenv("KEXEC_EMPTY_ZERO");
+
+	if(s){
+	  env = s;
+	}else if(!env){ 
+	  env = "0x0c001000";
+	}
+	return 0x1fffffff & strtoul(env,(char **)NULL,0);
+}
+
+char append_buf[256];
+
+char *get_append(void)
+{
+        FILE *fp;
+        int len;
+        if((fp = fopen("/proc/cmdline", "r")) == NULL){
+              printf("/proc/cmdline file open error !!\n");
+              exit(1);
+        }
+        fgets(append_buf, 256, fp);
+        len = strlen(append_buf);
+        append_buf[len-1] = 0;
+        fclose(fp);
+        return append_buf;
+}