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

   1 /* Hook for machine specific memory setup.
   2  *
   3  * This is included late in kernel/setup.c so that it can make use of all of
   4  * the static functions. */
   5
   6 static char * __init machine_specific_memory_setup(void)
   7 {
   8         char *who;
   9
  10         who = "NOT VOYAGER";
  11
  12         if(voyager_level == 5) {
  13                 __u32 addr, length;
  14                 int i;
  15
  16                 who = "Voyager-SUS";
  17
  18                 e820.nr_map = 0;
  19                 for(i=0; voyager_memory_detect(i, &addr, &length); i++) {
  20                         add_memory_region(addr, length, E820_RAM);
  21                 }
  22                 return who;
  23         } else if(voyager_level == 4) {
  24                 __u32 tom;
  25                 __u16 catbase = inb(VOYAGER_SSPB_RELOCATION_PORT)<<8;
  26                 /* select the DINO config space */
  27                 outb(VOYAGER_DINO, VOYAGER_CAT_CONFIG_PORT);
  28                 /* Read DINO top of memory register */
  29                 tom = ((inb(catbase + 0x4) & 0xf0) << 16)
  30                         + ((inb(catbase + 0x5) & 0x7f) << 24);
  31
  32                 if(inb(catbase) != VOYAGER_DINO) {
  33                         printk(KERN_ERR "Voyager: Failed to get DINO for L4, setting tom to EXT_MEM_K\n");
  34                         tom = (EXT_MEM_K)<<10;
  35                 }
  36                 who = "Voyager-TOM";
  37                 add_memory_region(0, 0x9f000, E820_RAM);
  38                 /* map from 1M to top of memory */
  39                 add_memory_region(1*1024*1024, tom - 1*1024*1024, E820_RAM);
  40                 /* FIXME: Should check the ASICs to see if I need to
  41                  * take out the 8M window.  Just do it at the moment
  42                  * */
  43                 add_memory_region(8*1024*1024, 8*1024*1024, E820_RESERVED);
  44                 return who;
  45         }
  46
  47         who = "BIOS-e820";
  48
  49         /*
  50          * Try to copy the BIOS-supplied E820-map.
  51          *
  52          * Otherwise fake a memory map; one section from 0k->640k,
  53          * the next section from 1mb->appropriate_mem_k
  54          */
  55         sanitize_e820_map(E820_MAP, &E820_MAP_NR);
  56         if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0) {
  57                 unsigned long mem_size;
  58
  59                 /* compare results from other methods and take the greater */
  60                 if (ALT_MEM_K < EXT_MEM_K) {
  61                         mem_size = EXT_MEM_K;
  62                         who = "BIOS-88";
  63                 } else {
  64                         mem_size = ALT_MEM_K;
  65                         who = "BIOS-e801";
  66                 }
  67
  68                 e820.nr_map = 0;
  69                 add_memory_region(0, LOWMEMSIZE(), E820_RAM);
  70                 add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
  71         }
  72         return who;
  73 }