util/cbfstool/common.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #ifndef __CBFSTOOL_COMMON_H
   4 #define __CBFSTOOL_COMMON_H
   5
   6 #include <stdbool.h>
   7 #include <stddef.h>
   8 #include <stdint.h>
   9 #include <string.h>
  10 #include <assert.h>
  11
  12 #include <commonlib/bsd/cbfs_serialized.h>
  13 #include <commonlib/bsd/sysincludes.h>
  14 #include <commonlib/helpers.h>
  15 #include <console/console.h>
  16
  17 /*
  18  * There are two address spaces that this tool deals with - SPI flash address space and host
  19  * address space. This macros checks if the address is greater than 2GiB under the assumption
  20  * that the low MMIO lives in the top half of the 4G address space of the host.
  21  */
  22 #define IS_HOST_SPACE_ADDRESS(addr)     ((uint32_t)(addr) > 0x80000000)
  23
  24 #define unused __attribute__((unused))
  25
  26 static inline uint32_t align_up(uint32_t value, uint32_t align)
  27 {
  28         if (value % align)
  29                 value += align - (value % align);
  30         return value;
  31 }
  32
  33 /* Buffer and file I/O */
  34 struct buffer {
  35         char *name;
  36         char *data;
  37         size_t offset;
  38         size_t size;
  39 };
  40
  41 static inline void *buffer_get(const struct buffer *b)
  42 {
  43         return b->data;
  44 }
  45
  46 static inline size_t buffer_size(const struct buffer *b)
  47 {
  48         return b->size;
  49 }
  50
  51 static inline size_t buffer_offset(const struct buffer *b)
  52 {
  53         return b->offset;
  54 }
  55
  56 static inline void *buffer_end(const struct buffer *b)
  57 {
  58         return b->data + b->size;
  59 }
  60
  61 /*
  62  * Shrink a buffer toward the beginning of its previous space.
  63  * Afterward, buffer_delete() remains the means of cleaning it up. */
  64 static inline void buffer_set_size(struct buffer *b, size_t size)
  65 {
  66         b->size = size;
  67 }
  68
  69 /* Initialize a buffer with the given constraints. */
  70 static inline void buffer_init(struct buffer *b, char *name, void *data,
  71                                size_t size)
  72 {
  73         b->name = name;
  74         b->data = data;
  75         b->size = size;
  76         b->offset = 0;
  77 }
  78
  79 /* Splice a buffer into another buffer. Note that it's up to the caller to
  80  * bounds check the offset and size. The resulting buffer is backed by the same
  81  * storage as the original, so although it is valid to buffer_delete() either
  82  * one of them, doing so releases both simultaneously. */
  83 static inline void buffer_splice(struct buffer *dest, const struct buffer *src,
  84                                  size_t offset, size_t size)
  85 {
  86         dest->name = src->name;
  87         dest->data = src->data + offset;
  88         dest->offset = src->offset + offset;
  89         dest->size = size;
  90 }
  91
  92 /*
  93  * Shallow copy a buffer. To clean up the resources, buffer_delete()
  94  * either one, but not both. */
  95 static inline void buffer_clone(struct buffer *dest, const struct buffer *src)
  96 {
  97         buffer_splice(dest, src, 0, src->size);
  98 }
  99
 100 /*
 101  * Shrink a buffer toward the end of its previous space.
 102  * Afterward, buffer_delete() remains the means of cleaning it up. */
 103 static inline void buffer_seek(struct buffer *b, size_t size)
 104 {
 105         b->offset += size;
 106         b->size -= size;
 107         b->data += size;
 108 }
 109
 110 /* Returns whether the buffer begins with the specified magic bytes. */
 111 static inline bool buffer_check_magic(const struct buffer *b, const char *magic,
 112                                                         size_t magic_len)
 113 {
 114         assert(magic);
 115         return b && b->size >= magic_len &&
 116                                         memcmp(b->data, magic, magic_len) == 0;
 117 }
 118
 119 /* Returns the start of the underlying buffer, with the offset undone */
 120 static inline void *buffer_get_original_backing(const struct buffer *b)
 121 {
 122         if (!b)
 123                 return NULL;
 124         return buffer_get(b) - buffer_offset(b);
 125 }
 126
 127 /* Creates an empty memory buffer with given size.
 128  * Returns 0 on success, otherwise non-zero. */
 129 int buffer_create(struct buffer *buffer, size_t size, const char *name);
 130
 131 /* Loads a file into memory buffer. Returns 0 on success, otherwise non-zero. */
 132 int buffer_from_file(struct buffer *buffer, const char *filename);
 133
 134 /* Loads a file into memory buffer (with buffer size rounded up to a multiple of
 135    size_granularity). Returns 0 on success, otherwise non-zero. */
 136 int buffer_from_file_aligned_size(struct buffer *buffer, const char *filename,
 137                                   size_t size_granularity);
 138
 139 /* Writes memory buffer content into file.
 140  * Returns 0 on success, otherwise non-zero. */
 141 int buffer_write_file(struct buffer *buffer, const char *filename);
 142
 143 /* Destroys a memory buffer. */
 144 void buffer_delete(struct buffer *buffer);
 145
 146 const char *arch_to_string(uint32_t a);
 147 uint32_t string_to_arch(const char *arch_string);
 148
 149 /* Compress in_len bytes from in, storing the result at out, returning the
 150  * resulting length in out_len.
 151  * Returns 0 on error,
 152  *         != 0 otherwise, depending on the compressing function.
 153  */
 154 typedef int (*comp_func_ptr) (char *in, int in_len, char *out, int *out_len);
 155
 156 /* Decompress in_len bytes from in, storing the result at out, up to out_len
 157  * bytes.
 158  * Returns 0 on error,
 159  *         != 0 otherwise, depending on the decompressing function.
 160  */
 161 typedef int (*decomp_func_ptr) (char *in, int in_len, char *out, int out_len,
 162                                 size_t *actual_size);
 163
 164 comp_func_ptr compression_function(enum cbfs_compression algo);
 165 decomp_func_ptr decompression_function(enum cbfs_compression algo);
 166
 167 uint64_t intfiletype(const char *name);
 168
 169 /* cbfs-mkpayload.c */
 170 int parse_elf_to_payload(const struct buffer *input, struct buffer *output,
 171                          enum cbfs_compression algo);
 172 int parse_fv_to_payload(const struct buffer *input, struct buffer *output,
 173                         enum cbfs_compression algo);
 174 int parse_fit_to_payload(const struct buffer *input, struct buffer *output,
 175                          enum cbfs_compression algo);
 176 int parse_bzImage_to_payload(const struct buffer *input,
 177                              struct buffer *output, const char *initrd,
 178                              char *cmdline, enum cbfs_compression algo);
 179 int parse_flat_binary_to_payload(const struct buffer *input,
 180                                  struct buffer *output,
 181                                  uint64_t loadaddress,
 182                                  uint64_t entrypoint,
 183                                  enum cbfs_compression algo);
 184 /* cbfs-mkstage.c */
 185 int parse_elf_to_stage(const struct buffer *input, struct buffer *output,
 186                        const char *ignore_section,
 187                        struct cbfs_file_attr_stageheader *stageheader);
 188 /* location is TOP aligned. */
 189 int parse_elf_to_xip_stage(const struct buffer *input, struct buffer *output,
 190                            uint32_t location, const char *ignore_section,
 191                            struct cbfs_file_attr_stageheader *stageheader);
 192
 193 void print_supported_architectures(void);
 194 void print_supported_filetypes(void);
 195
 196 /* lzma/lzma.c */
 197 int do_lzma_compress(char *in, int in_len, char *out, int *out_len);
 198 int do_lzma_uncompress(char *dst, int dst_len, char *src, int src_len,
 199                         size_t *actual_size);
 200
 201 /* xdr.c */
 202 struct xdr {
 203         uint8_t (*get8)(struct buffer *input);
 204         uint16_t (*get16)(struct buffer *input);
 205         uint32_t (*get32)(struct buffer *input);
 206         uint64_t (*get64)(struct buffer *input);
 207         void (*put8)(struct buffer *input, uint8_t val);
 208         void (*put16)(struct buffer *input, uint16_t val);
 209         void (*put32)(struct buffer *input, uint32_t val);
 210         void (*put64)(struct buffer *input, uint64_t val);
 211 };
 212
 213 extern struct xdr xdr_le, xdr_be;
 214 size_t bgets(struct buffer *input, void *output, size_t len);
 215 size_t bputs(struct buffer *b, const void *data, size_t len);
 216
 217 /* Returns a 0-terminated string containing a hex representation of
 218  * len bytes starting at data.
 219  * The string is malloc'd and it's the caller's responsibility to free
 220  * the memory.
 221  * On error, bintohex returns NULL.
 222  */
 223 char *bintohex(uint8_t *data, size_t len);
 224 #endif