arch/x86/include/asm/dmi.h

   1 #ifndef _ASM_X86_DMI_H
   2 #define _ASM_X86_DMI_H
   3
   4 #include <asm/io.h>
   5
   6 #define DMI_MAX_DATA 2048
   7
   8 extern int dmi_alloc_index;
   9 extern char dmi_alloc_data[DMI_MAX_DATA];
  10
  11 /* This is so early that there is no good way to allocate dynamic memory.
  12    Allocate data in an BSS array. */
  13 static inline void *dmi_alloc(unsigned len)
  14 {
  15         int idx = dmi_alloc_index;
  16         if ((dmi_alloc_index + len) > DMI_MAX_DATA)
  17                 return NULL;
  18         dmi_alloc_index += len;
  19         return dmi_alloc_data + idx;
  20 }
  21
  22 /* Use early IO mappings for DMI because it's initialized early */
  23 #define dmi_ioremap early_ioremap
  24 #define dmi_iounmap early_iounmap
  25
  26 #endif /* _ASM_X86_DMI_H */