src/include/cbfs_glue.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #ifndef _CBFS_GLUE_H_
   4 #define _CBFS_GLUE_H_
   5
   6 #include <commonlib/region.h>
   7 #include <console/console.h>
   8 #include <rules.h>
   9
  10 /*
  11  * This flag prevents linking hashing functions into stages where they're not required. We don't
  12  * need them at all if verification is disabled. If verification is enabled without TOCTOU
  13  * safety, we only need to verify the metadata hash in the initial stage and can assume it stays
  14  * valid in later stages. If TOCTOU safety is required, we may need them in every stage to
  15  * reverify metadata that had to be reloaded from flash (e.g. because it didn't fit the mcache).
  16  * Note that this only concerns metadata hashing -- file access functions may still link hashing
  17  * routines independently for file data hashing.
  18  */
  19 #define CBFS_ENABLE_HASHING (CONFIG(CBFS_VERIFICATION) && \
  20                              (CONFIG(TOCTOU_SAFETY) || ENV_INITIAL_STAGE))
  21
  22 #define ERROR(...) printk(BIOS_ERR, "CBFS ERROR: " __VA_ARGS__)
  23 #define LOG(...) printk(BIOS_INFO, "CBFS: " __VA_ARGS__)
  24 #define DEBUG(...) do { \
  25         if (CONFIG(DEBUG_CBFS)) \
  26                 printk(BIOS_SPEW, "CBFS DEBUG: " __VA_ARGS__); \
  27 } while (0)
  28
  29 typedef const struct region_device *cbfs_dev_t;
  30
  31 static inline ssize_t cbfs_dev_read(cbfs_dev_t dev, void *buffer, size_t offset, size_t size)
  32 {
  33         return rdev_readat(dev, buffer, offset, size);
  34 }
  35
  36 static inline size_t cbfs_dev_size(cbfs_dev_t dev)
  37 {
  38         return region_device_sz(dev);
  39 }
  40
  41 #endif  /* _CBFS_GLUE_H_ */