add libshared/libnvram and required includes under version control

git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@344 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 148 insertions, 0 deletions

diff --git a/package/openwrt/include/bcmnvram.h b/package/openwrt/include/bcmnvram.h
new file mode 100644
index 0000000000..3c452634e8
--- /dev/null
+++ b/package/openwrt/include/bcmnvram.h
@@ -0,0 +1,148 @@
+/*
+ * NVRAM variable manipulation
+ *
+ * Copyright 2004, Broadcom Corporation
+ * All Rights Reserved.
+ * 
+ * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
+ * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
+ * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
+ *
+ * $Id$
+ */
+
+#ifndef _bcmnvram_h_
+#define _bcmnvram_h_
+
+#ifndef _LANGUAGE_ASSEMBLY
+
+#include <typedefs.h>
+
+struct nvram_header {
+	uint32 magic;
+	uint32 len;
+	uint32 crc_ver_init;	/* 0:7 crc, 8:15 ver, 16:27 init, mem. test 28, 29-31 reserved */
+	uint32 config_refresh;	/* 0:15 config, 16:31 refresh */
+	uint32 config_ncdl;	/* ncdl values for memc */
+};
+
+struct nvram_tuple {
+	char *name;
+	char *value;
+	struct nvram_tuple *next;
+};
+
+/*
+ * Initialize NVRAM access. May be unnecessary or undefined on certain
+ * platforms.
+ */
+extern int nvram_init(void *sbh);
+
+/*
+ * Disable NVRAM access. May be unnecessary or undefined on certain
+ * platforms.
+ */
+extern void nvram_exit(void);
+
+/*
+ * Get the value of an NVRAM variable. The pointer returned may be
+ * invalid after a set.
+ * @param	name	name of variable to get
+ * @return	value of variable or NULL if undefined
+ */
+extern char * nvram_get(const char *name);
+
+/* 
+ * Get the value of an NVRAM variable.
+ * @param	name	name of variable to get
+ * @return	value of variable or NUL if undefined
+ */
+#define nvram_safe_get(name) (nvram_get(name) ? : "")
+
+#define nvram_safe_unset(name) ({ \
+	if(nvram_get(name)) \
+		nvram_unset(name); \
+})
+
+#define nvram_safe_set(name, value) ({ \
+	if(!nvram_get(name) || strcmp(nvram_get(name), value)) \
+		nvram_set(name, value); \
+})
+
+/*
+ * Match an NVRAM variable.
+ * @param	name	name of variable to match
+ * @param	match	value to compare against value of variable
+ * @return	TRUE if variable is defined and its value is string equal
+ *		to match or FALSE otherwise
+ */
+static INLINE int
+nvram_match(char *name, char *match) {
+	const char *value = nvram_get(name);
+	return (value && !strcmp(value, match));
+}
+
+/*
+ * Inversely match an NVRAM variable.
+ * @param	name	name of variable to match
+ * @param	match	value to compare against value of variable
+ * @return	TRUE if variable is defined and its value is not string
+ *		equal to invmatch or FALSE otherwise
+ */
+static INLINE int
+nvram_invmatch(char *name, char *invmatch) {
+	const char *value = nvram_get(name);
+	return (value && strcmp(value, invmatch));
+}
+
+/*
+ * Set the value of an NVRAM variable. The name and value strings are
+ * copied into private storage. Pointers to previously set values
+ * may become invalid. The new value may be immediately
+ * retrieved but will not be permanently stored until a commit.
+ * @param	name	name of variable to set
+ * @param	value	value of variable
+ * @return	0 on success and errno on failure
+ */
+extern int nvram_set(const char *name, const char *value);
+
+/*
+ * Unset an NVRAM variable. Pointers to previously set values
+ * remain valid until a set.
+ * @param	name	name of variable to unset
+ * @return	0 on success and errno on failure
+ * NOTE: use nvram_commit to commit this change to flash.
+ */
+extern int nvram_unset(const char *name);
+
+/*
+ * Commit NVRAM variables to permanent storage. All pointers to values
+ * may be invalid after a commit.
+ * NVRAM values are undefined after a commit.
+ * @return	0 on success and errno on failure
+ */
+extern int nvram_commit(void);
+
+/*
+ * Get all NVRAM variables (format name=value\0 ... \0\0).
+ * @param	buf	buffer to store variables
+ * @param	count	size of buffer in bytes
+ * @return	0 on success and errno on failure
+ */
+extern int nvram_getall(char *buf, int count);
+
+extern int file2nvram(char *filename, char *varname);
+extern int nvram2file(char *varname, char *filename);
+
+#endif /* _LANGUAGE_ASSEMBLY */
+
+#define NVRAM_MAGIC		0x48534C46	/* 'FLSH' */
+#define NVRAM_VERSION		1
+#define NVRAM_HEADER_SIZE	20
+#define NVRAM_SPACE		0x8000
+#define FLASH_BASE		0xbfc00000	/* Extif core */
+#define FLASH_MIN		0x00100000	/* Minimum flash size */
+#define FLASH_MAX		0x00400000	/* Maximum flash size with extif */
+
+#endif /* _bcmnvram_h_ */