#include <compiler.h>
#include <linux/compiler.h>
+struct cbfs_priv;
+
enum cbfs_result {
CBFS_SUCCESS = 0,
CBFS_NOT_INITIALIZED,
CBFS_TYPE_CBFSHEADER = 0x02,
CBFS_TYPE_STAGE = 0x10,
CBFS_TYPE_PAYLOAD = 0x20,
+ CBFS_TYPE_SELF = CBFS_TYPE_PAYLOAD,
+
CBFS_TYPE_FIT = 0x21,
CBFS_TYPE_OPTIONROM = 0x30,
CBFS_TYPE_BOOTSPLASH = 0x40,
enum {
CBFS_HEADER_MAGIC = 0x4f524243,
+ CBFS_SIZE_UNKNOWN = 0xffffffff,
+ CBFS_ALIGN_SIZE = 0x40,
};
/**
/* offset to struct cbfs_file_attribute or 0 */
u32 attributes_offset;
u32 offset;
+ char filename[];
} __packed;
+/**
+ * These are standard values for the known compression alogrithms that coreboot
+ * knows about for stages and payloads. Of course, other CBFS users can use
+ * whatever values they want, as long as they understand them.
+ */
+#define CBFS_COMPRESS_NONE 0
+#define CBFS_COMPRESS_LZMA 1
+#define CBFS_COMPRESS_LZ4 2
+
+/*
+ * Depending on how the header was initialized, it may be backed with 0x00 or
+ * 0xff, so support both
+ */
+#define CBFS_FILE_ATTR_TAG_UNUSED 0
+#define CBFS_FILE_ATTR_TAG_UNUSED2 0xffffffff
+#define CBFS_FILE_ATTR_TAG_COMPRESSION 0x42435a4c
+#define CBFS_FILE_ATTR_TAG_HASH 0x68736148
+
+/*
+ * The common fields of extended cbfs file attributes. Attributes are expected
+ * to start with tag/len, then append their specific fields
+ */
+struct cbfs_file_attribute {
+ u32 tag;
+ /* len covers the whole structure, incl. tag and len */
+ u32 len;
+ u8 data[0];
+} __packed;
+
+struct cbfs_file_attr_compression {
+ u32 tag;
+ u32 len;
+ /* whole file compression format. 0 if no compression. */
+ u32 compression;
+ u32 decompressed_size;
+} __packed;
+
+struct cbfs_file_attr_hash {
+ u32 tag;
+ u32 len;
+ u32 hash_type;
+ /* hash_data is len - sizeof(struct) bytes */
+ u8 hash_data[];
+} __packed;
+
+/*** Component sub-headers ***/
+
+/* Following are component sub-headers for the "standard" component types */
+
+/**
+ * struct cbfs_stage - sub-header for stage components
+ *
+ * Stages are loaded by coreboot during the normal boot process
+ */
+struct cbfs_stage {
+ u32 compression; /** Compression type */
+ u64 entry; /** entry point */
+ u64 load; /** Where to load in memory */
+ u32 len; /** length of data to load */
+ u32 memlen; /** total length of object in memory */
+} __packed;
+
+/**
+ * struct cbfs_payload_segment - sub-header for payload components
+ *
+ * Payloads are loaded by coreboot at the end of the boot process
+ */
+struct cbfs_payload_segment {
+ u32 type;
+ u32 compression;
+ u32 offset;
+ u64 load_addr;
+ u32 len;
+ u32 mem_len;
+} __packed;
+
+struct cbfs_payload {
+ struct cbfs_payload_segment segments;
+};
+
+#define PAYLOAD_SEGMENT_CODE 0x45444F43
+#define PAYLOAD_SEGMENT_DATA 0x41544144
+#define PAYLOAD_SEGMENT_BSS 0x20535342
+#define PAYLOAD_SEGMENT_PARAMS 0x41524150
+#define PAYLOAD_SEGMENT_ENTRY 0x52544E45
+
struct cbfs_cachenode {
struct cbfs_cachenode *next;
void *data;
u32 type;
u32 data_length;
u32 name_length;
- u32 attributes_offset;
+ u32 attr_offset;
+ u32 comp_algo;
+ u32 decomp_size;
};
-extern enum cbfs_result file_cbfs_result;
-
/**
* file_cbfs_error() - Return a string describing the most recent error
* condition.
*
- * @return A pointer to the constant string.
+ * Return: A pointer to the constant string.
*/
const char *file_cbfs_error(void);
/**
* cbfs_get_result() - Get the result of the last CBFS operation
*
- *@return last result
+ *Return: last result
*/
enum cbfs_result cbfs_get_result(void);
/**
* file_cbfs_init() - Initialize the CBFS driver and load metadata into RAM.
*
- * @end_of_rom: Points to the end of the ROM the CBFS should be read
- * from.
+ * @end_of_rom: Points to the end of the ROM the CBFS should be read from
+ * Return: 0 if OK, -ve on error
*/
-void file_cbfs_init(uintptr_t end_of_rom);
+int file_cbfs_init(ulong end_of_rom);
/**
* file_cbfs_get_header() - Get the header structure for the current CBFS.
*
- * @return A pointer to the constant structure, or NULL if there is none.
+ * Return: A pointer to the constant structure, or NULL if there is none.
*/
const struct cbfs_header *file_cbfs_get_header(void);
+/**
+ * cbfs_get_first() - Get the first file in a CBFS
+ *
+ * Return: pointer to first file, or NULL if it is empty
+ */
+const struct cbfs_cachenode *cbfs_get_first(const struct cbfs_priv *priv);
+
+/**
+ * cbfs_get_next() - Get the next file in a CBFS
+ *
+ * @filep: Pointer to current file; updated to point to the next file, if any,
+ * else NULL
+ */
+void cbfs_get_next(const struct cbfs_cachenode **filep);
+
/**
* file_cbfs_get_first() - Get a handle for the first file in CBFS.
*
- * @return A handle for the first file in CBFS, NULL on error.
+ * Return: A handle for the first file in CBFS, NULL on error.
*/
const struct cbfs_cachenode *file_cbfs_get_first(void);
*
* @name: The name to search for.
*
- * @return A handle to the file, or NULL on error.
+ * Return: A handle to the file, or NULL on error.
*/
const struct cbfs_cachenode *file_cbfs_find(const char *name);
-struct cbfs_priv;
-
/**
* cbfs_find_file() - Find a file in a given CBFS
*
* @cbfs: CBFS to look in (use cbfs_init_mem() to set it up)
* @name: Filename to look for
- * @return pointer to CBFS node if found, else NULL
+ * Return: pointer to CBFS node if found, else NULL
*/
const struct cbfs_cachenode *cbfs_find_file(struct cbfs_priv *cbfs,
const char *name);
* cbfs_init_mem() - Set up a new CBFS
*
* @base: Base address of CBFS
- * @size: Size of CBFS in bytes
+ * @size: Size of CBFS if known, else CBFS_SIZE_UNKNOWN
+ * @require_header: true to read a header at the start, false to not require one
* @cbfsp: Returns a pointer to CBFS on success
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
*/
-int cbfs_init_mem(ulong base, ulong size, struct cbfs_priv **privp);
-
+int cbfs_init_mem(ulong base, ulong size, bool require_hdr,
+ struct cbfs_priv **privp);
/***************************************************************************/
/* All of the functions below can be used without first initializing CBFS. */
/***************************************************************************/
/**
- * file_cbfs_find_uncached() - Find a file with a particular name in CBFS
- * without using the heap.
+ * file_cbfs_find_uncached() - Find a file in CBFS given the end of the ROM
*
- * @end_of_rom: Points to the end of the ROM the CBFS should be read
- * from.
- * @name: The name to search for.
+ * Note that @node should be declared by the caller. This design is to avoid
+ * the need for allocation here.
+ *
+ * @end_of_rom: Points to the end of the ROM the CBFS should be read from
+ * @name: The name to search for
+ * @node: Returns the contents of the node if found (i.e. copied into *node)
+ * Return: 0 on success, -ENOENT if not found, -EFAULT on bad header
+ */
+int file_cbfs_find_uncached(ulong end_of_rom, const char *name,
+ struct cbfs_cachenode *node);
+
+/**
+ * file_cbfs_find_uncached_base() - Find a file in CBFS given the base address
+ *
+ * Note that @node should be declared by the caller. This design is to avoid
+ * the need for allocation here.
*
- * @return A handle to the file, or NULL on error.
+ * @base: Points to the base of the CBFS
+ * @name: The name to search for
+ * @node: Returns the contents of the node if found (i.e. copied into *node)
+ * Return: 0 on success, -ENOENT if not found, -EFAULT on bad header
*/
-const struct cbfs_cachenode *file_cbfs_find_uncached(uintptr_t end_of_rom,
- const char *name);
+int file_cbfs_find_uncached_base(ulong base, const char *name,
+ struct cbfs_cachenode *node);
/**
* file_cbfs_name() - Get the name of a file in CBFS.
*
* @file: The handle to the file.
*
- * @return The name of the file, NULL on error.
+ * Return: The name of the file, NULL on error.
*/
const char *file_cbfs_name(const struct cbfs_cachenode *file);
*
* @file: The handle to the file.
*
- * @return The size of the file, zero on error.
+ * Return: The size of the file, zero on error.
*/
u32 file_cbfs_size(const struct cbfs_cachenode *file);
*
* @file: The handle to the file.
*
- * @return The type of the file, zero on error.
+ * Return: The type of the file, zero on error.
*/
u32 file_cbfs_type(const struct cbfs_cachenode *file);
* @buffer: Where to read it into memory.
* @maxsize: Maximum number of bytes to read
*
- * @return If positive or zero, the number of characters read. If negative, an
+ * Return: If positive or zero, the number of characters read. If negative, an
* error occurred.
*/
long file_cbfs_read(const struct cbfs_cachenode *file, void *buffer,
projects / J-u-boot.git / blobdiff