1. 06 Mar, 2009 1 commit
  2. 05 Mar, 2009 1 commit
    • Carl-Daniel Hailfinger's avatar
      Use helper functions to access flash chips · 61a8bd27
      Carl-Daniel Hailfinger authored
      
      Right now we perform direct pointer manipulation without any abstraction
      to read from and write to memory mapped flash chips. That makes it
      impossible to drive any flasher which does not mmap the whole chip.
      
      Using helper functions readb() and writeb() allows a driver for external
      flash programmers like Paraflasher to replace readb and writeb with
      calls to its own chip access routines.
      
      This patch has the additional advantage of removing lots of unnecessary
      casts to volatile uint8_t * and now-superfluous parentheses which caused
      poor readability.
      
      I used the semantic patcher Coccinelle to create this patch. The
      semantic patch follows:
      @@
      expression a;
      typedef uint8_t;
      volatile uint8_t *b;
      @@
      - *(b) = (a);
      + writeb(a, b);
      @@
      volatile uint8_t *b;
      @@
      - *(b)
      + readb(b)
      @@
      type T;
      T b;
      @@
      (
       readb
      |
       writeb
      )
       (...,
      - (T)
      - (b)
      + b
       )
      
      In contrast to a sed script, the semantic patch performs type checking
      before converting anything.
      
      Tested-by: Joe Julian
      
      Corresponding to flashrom svn r418 and coreboot v2 svn r3971.
      Signed-off-by: default avatarCarl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
      Acked-by: default avatarFENG Yu Ning <fengyuning1984@gmail.com>
      61a8bd27
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