busybox-0.51-flash.ppc.patch

这是嵌入式linux的busybox源代码

+ diff -u busybox-0.51/Config.h.ORIG busybox-0.51/Config.h
--- busybox-0.51/Config.h.ORIG	Sat Jun  2 17:26:28 2001
+++ busybox-0.51/Config.h	Sat Jun  2 17:26:58 2001
@@ -37,6 +37,8 @@
 //#define BB_FBSET
 //#define BB_FDFLUSH
 //#define BB_FIND
+#define BB_FLASH_ERASE
+#define BB_FLASH_INFO
 #define BB_FREE
 //#define BB_FREERAMDISK
 //#define BB_FSCK_MINIX
+ diff -u busybox-0.51/applets.h.ORIG busybox-0.51/applets.h
--- busybox-0.51/applets.h.ORIG	Wed Apr  4 19:31:15 2001
+++ busybox-0.51/applets.h	Sat Jun  2 17:26:58 2001
@@ -149,6 +149,12 @@
 #ifdef BB_FIND
 	APPLET(find, find_main, _BB_DIR_USR_BIN)
 #endif
+#ifdef BB_FLASH_ERASE
+	APPLET(flash_erase, flash_erase_main, _BB_DIR_BIN)
+#endif
+#ifdef BB_FLASH_INFO
+	APPLET(flash_info, flash_info_main, _BB_DIR_BIN)
+#endif
 #ifdef BB_FREE
 	APPLET(free, free_main, _BB_DIR_USR_BIN)
 #endif
+ diff -u busybox-0.51/flash_erase.c.ORIG busybox-0.51/flash_erase.c
--- busybox-0.51/flash_erase.c.ORIG	Sat Jun  2 17:26:58 2001
+++ busybox-0.51/flash_erase.c	Sat Jun  2 17:26:58 2001
@@ -0,0 +1,253 @@
+/*
+ * (C) Copyright 2000
+ * DENX Software Engineering
+ * Wolfgang Denk, [e-mail]
+ * All rights reserved.
+ *
+ * $Date: 2002/02/04 09:32:25 $
+ * $Revision: 1.2 $
+ */
+
+#include "busybox.h"
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include "flash.h"
+#include <linux/fs.h>
+
+int get_number (const char *, unsigned long *);
+
+static const char *cmdname;
+
+extern int flash_erase_main (int argc, char **argv)
+{
+	int i, fd, part;
+	struct stat stb;
+	flash_info_t info;
+	flash_region_info_t *region;
+	flash_partition_t *partition;
+	erase_info_t erase;
+	unsigned long offset, size, p_offset, p_size;
+
+	cmdname = *argv;
+
+	if ((argc != 2) && (argc != 4)) {
+		show_usage ();
+	}
+
+	if ((fd = open (argv[1], O_RDWR)) < 0) {
+		perror (argv[1]);
+		return (EXIT_FAILURE);
+	}
+
+	if (fstat(fd, &stb) < 0) {
+		perror (argv[1]);
+		return (EXIT_FAILURE);
+	}
+
+	part = MINOR(stb.st_rdev) & FLASH_PART_MASK;
+
+	if (ioctl (fd, FLASHGETINFO, &info) < 0) {
+		perror (argv[1]);
+		return (EXIT_FAILURE);
+	}
+
+	size = info.num_regions * sizeof (flash_region_info_t);
+
+	if ((region = malloc (size)) == NULL) {
+		perror (argv[1]);
+		return (EXIT_FAILURE);
+	}
+
+	if (ioctl (fd, FLASHGETREGIONINFO, region) < 0) {
+		perror (argv[1]);
+		return (EXIT_FAILURE);
+	}
+
+	if (part) {	/* read partition info */
+		if ((partition = malloc(sizeof(flash_partition_t)*info.num_parts))
+			== NULL) {
+			perror ("malloc");
+			return (EXIT_FAILURE);
+		}
+
+		if (ioctl (fd, FLASHGETPARTINFO, partition) < 0) {
+			perror (argv[1]);
+			return (EXIT_FAILURE);
+		}
+		p_offset = partition[part-1].start;
+		p_size   = partition[part-1].size;
+	} else {
+		p_offset = 0;
+		p_size   = 0;
+	}
+
+
+	if (argc == 2) {
+	    if (part) {
+		/*
+		 * erase whole partition
+		 */
+		printf ("Erasing Partition %d (%ld kB at offset 0x%lx)\n",
+			part, p_size >> 10, p_offset);
+		erase.offset = 0;
+		erase.size   = p_size;
+		if (ioctl (fd, FLASHERASE, &erase) < 0) {
+			perror ("Erase failed");
+			return (EXIT_FAILURE);
+		}
+	    } else {
+		/*
+		 * erase whole device
+		 */
+		offset = 0;
+		for (i = 0; i < info.num_regions; i++) {
+			int reg_size = region[i].num_sectors * region[i].sector_size;
+
+			erase.offset = offset;
+			erase.size = reg_size;
+			printf ("Erasing %2d sectors (%3d kB, total %4d kB)"
+				" at offset 0x%lx\n",
+				region[i].num_sectors,
+				region[i].sector_size >> 10,
+				reg_size >> 10,
+				offset
+			);
+			if (ioctl (fd, FLASHERASE, &erase) < 0) {
+				perror ("Erase sector failed");
+				return (EXIT_FAILURE);
+			}
+			offset += reg_size;
+		}
+	    }
+	    close (fd);
+	    return (EXIT_SUCCESS);
+	}
+
+	/*
+	 * Erase part of the device
+	 */
+	if (get_number (argv[2], &offset) < 0) {
+		fprintf (stderr, "%s: bad offset: %s\n", cmdname, argv[2]);
+		show_usage ();
+	}
+	if (get_number (argv[3], &size) < 0) {
+		fprintf (stderr, "%s: bad size: %s\n", cmdname, argv[3]);
+		show_usage ();
+	}
+
+	/*
+	 * The Flash driver with partition support interprets
+	 * erase.offset relative to the current partition.
+	 *
+	 * "offset" is relative to the start of the current partition,
+	 * while "p_offset" relative to the start of the whole device.
+	 */
+
+	p_size -= p_offset;	/* remaining length of partititon */
+	p_offset += offset;	/* offset relative to device */
+
+	for (i = 0; i < info.num_regions; i++) {
+		unsigned long reg_size = region[i].num_sectors
+					 * region[i].sector_size;
+		unsigned long reg_end  = region[i].offset + reg_size;
+
+		if ((reg_end <= p_offset) ||	/* region below erase area */
+		    (region[i].offset > p_offset + size)) { /* region above erase area */
+			continue;
+		}
+		/* region contains at least part of erase area */
+		if (p_offset % region[i].sector_size) {
+			fprintf (stderr, "%s: offset 0x%lx not on sector boundary "
+					 "(region %u: sector size=0x%x=%dkB)\n",
+					 cmdname, offset, i,
+					 region[i].sector_size, region[i].sector_size >> 10);
+
+			return (EXIT_FAILURE);
+		}
+		erase.offset = offset;
+		erase.size = reg_end - p_offset;
+		if (erase.size > size) {
+			erase.size = size;
+		}
+		if (p_size && erase.size > p_size) {
+			erase.size = p_size;	/* don't delete beyond partition */
+		}
+
+		printf ("Erasing %4ld kB = %2ld sectors (%3d kB) at offset 0x%lx",
+			erase.size >> 10, erase.size / region[i].sector_size,
+			region[i].sector_size >> 10, offset);
+		if (part) {
+			printf (" in partition %d", part);
+		}
+		printf ("\n");
+		if (ioctl (fd, FLASHERASE, &erase) < 0) {
+			fprintf (stderr, "%s: Erase sector failed on %s: %s\n",
+					 cmdname, argv[1], strerror (errno));
+			return (EXIT_FAILURE);
+		}
+		p_offset += erase.size;
+		offset   += erase.size;
+		size -= erase.size;
+		if (!size) {
+			break;
+		}
+	}
+
+	if (size) {
+		printf ("Warning: %ld kB not erased (size bigger than %s)\n",
+			size, part ? "partition" : "device");
+	}
+
+	close (fd);
+
+	return (EXIT_SUCCESS);
+}
+
+int get_number (const char *s, unsigned long *val)
+{
+	unsigned long ret;
+	unsigned char c = 0;
+
+	if (*s == '0') {			/* hex or octal number */
+		++s;
+		/* just 0 ? */
+		if (*s == '\0') {
+			*val = 0;
+			return (0);
+		}
+		/* is it hex? */
+		if ((sscanf (s, "x%lx%c", &ret, &c) <= 0) &&
+			(sscanf (s, "X%lx%c", &ret, &c) <= 0)) {
+			/* not hex, maybe oct ? */
+			if (sscanf (s, "%lo%c", &ret, &c) <= 0) {
+				return (-1);
+			}
+		}
+	} else {
+		/* must be dec then */
+		if (sscanf (s, "%ld%c", &ret, &c) <= 0) {
+			return (-1);
+		}
+	}
+
+	switch (c) {
+	case 'k':
+	case 'K':
+		ret <<= 10;				/* kB */
+		break;
+	case 'm':
+	case 'M':
+		ret <<= 20;				/* MB */
+		break;
+	}
+
+	*val = ret;
+	return (0);
+}
+ diff -u busybox-0.51/flash_info.c.ORIG busybox-0.51/flash_info.c
--- busybox-0.51/flash_info.c.ORIG	Sat Jun  2 17:26:58 2001
+++ busybox-0.51/flash_info.c	Sat Jun  2 17:26:58 2001
@@ -0,0 +1,112 @@
+/*
+ * (C) Copyright 2000
+ * DENX Software Engineering
+ * Wolfgang Denk, [e-mail]
+ * All rights reserved.
+ *     
+ * $Date: 2002/02/04 09:32:25 $
+ * $Revision: 1.2 $
+ */
+
+#include "busybox.h"
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include "flash.h"
+
+
+extern int flash_info_main (int argc, char **argv)
+{
+	int i, fd, part;
+	struct stat stb;
+	flash_info_t info;
+	flash_region_info_t *region;
+	flash_partition_t *partition;
+
+	if (argc != 2) {
+		show_usage ();
+	}
+
+	if ((fd = open(argv[1], O_RDONLY)) < 0) {
+		perror (argv[1]);
+		return (EXIT_FAILURE);
+	}
+
+	if (fstat(fd, &stb) < 0) {
+		perror (argv[1]);
+		return (EXIT_FAILURE);
+	}
+
+	part = stb.st_rdev & FLASH_PART_MASK;
+
+	if (ioctl (fd, FLASHGETINFO, &info) != 0) {
+		perror (argv[1]);
+		return (EXIT_FAILURE);
+	}
+
+	printf ("Information for %s", argv[1]);
+	if (part) {
+		printf (" = Partition %d on this device", part);
+	}
+	printf (":\n\nSize: %2d MB,  Configuration: %dx%d bit,"
+		"  %d Regions,  %d Partitions\n\n",
+		info.size >> 20, info.chip_config, info.bitwidth,
+		info.num_regions, info.num_parts);
+
+	if ((region = malloc (sizeof (flash_region_info_t) * info.num_regions))
+		== NULL) {
+		perror ("malloc");
+		return (EXIT_FAILURE);
+	}
+
+	if (ioctl (fd, FLASHGETREGIONINFO, region) != 0) {
+		perror (argv[1]);
+		return (EXIT_FAILURE);
+	}
+
+	for (i = 0; i < info.num_regions; i++) {
+		printf ("Region    %d:  Offset: 0x%08lx"
+			"  Size: %5d kB in %3d Sectors of %4d kB each\n",
+			i,
+			region[i].offset,
+			region[i].num_sectors * region[i].sector_size >> 10,
+			region[i].num_sectors,
+			region[i].sector_size >> 10
+		);
+	}
+
+	if (!part) {
+		(void)close (fd);
+		return (EXIT_SUCCESS);
+	}
+
+	if ((partition = malloc (sizeof (flash_partition_t) * info.num_parts))
+		== NULL) {
+		perror ("malloc");
+		return (EXIT_FAILURE);
+	}
+
+	if (ioctl (fd, FLASHGETPARTINFO, partition) != 0) {
+		perror (argv[1]);
+		return (EXIT_FAILURE);
+	}
+
+	printf ("\n");
+
+	for (i = 0; i < info.num_parts; i++) {
+		printf ("Partition %d:  Offset: 0x%08lx  Size: %5d kB\n",
+			i+1,
+			partition[i].start,
+			partition[i].size >> 10
+		);
+	}
+
+	(void)close (fd);
+	return (EXIT_SUCCESS);
+}
+ diff -u busybox-0.51/usage.h.ORIG busybox-0.51/usage.h
--- busybox-0.51/usage.h.ORIG	Tue Apr 10 01:26:31 2001
+++ busybox-0.51/usage.h	Sat Jun  2 17:26:58 2001
@@ -449,6 +449,23 @@
 	"$ find / -name /etc/passwd\n" \
 	"/etc/passwd\n"
 
+#define flash_info_trivial_usage \
+	" flash_device\n"
+#define flash_info_full_usage \
+	"Print information for a Flash Memory Device\n"
+#define flash_info_example_usage \
+	"$ flash_info /dev/flasha1\n"
+
+#define flash_erase_trivial_usage \
+	" flash_device [OFFSET LENGTH]\n"
+#define flash_erase_full_usage \
+	"Erase a Flash Memory Device or some part of it.\n" \
+	"offset, length: hex (0xNN), dec (NN) or oct (0NN) numbers,\n" \
+	"                plus optional 'k' or 'm' suffix" \
+	" (for kB or MB, resp.)\n"
+#define flash_erase_example_usage \
+	"$ flash_erase /dev/flasha 3M 512k\n"
+
 #define free_trivial_usage \
 	""
 #define free_full_usage \