include/asm-i386/mach-pc9800/setup_arch_post.h

   1 /**
   2  * machine_specific_memory_setup - Hook for machine specific memory setup.
   3  *
   4  * Description:
   5  *      This is included late in kernel/setup.c so that it can make
   6  *      use of all of the static functions.
   7  **/
   8
   9 static inline char * __init machine_specific_memory_setup(void)
  10 {
  11         char *who;
  12         unsigned long low_mem_size, lower_high, higher_high;
  13
  14
  15         who = "BIOS (common area)";
  16
  17         low_mem_size = ((*(unsigned char *)__va(PC9800SCA_BIOS_FLAG) & 7) + 1) << 17;
  18         add_memory_region(0, low_mem_size, 1);
  19         lower_high = (__u32) *(__u8 *) bus_to_virt(PC9800SCA_EXPMMSZ) << 17;
  20         higher_high = (__u32) *(__u16 *) bus_to_virt(PC9800SCA_MMSZ16M) << 20;
  21         if (lower_high != 0x00f00000UL) {
  22                 add_memory_region(HIGH_MEMORY, lower_high, 1);
  23                 add_memory_region(0x01000000UL, higher_high, 1);
  24         }
  25         else
  26                 add_memory_region(HIGH_MEMORY, lower_high + higher_high, 1);
  27
  28         return who;
  29 }