include/asm-i386/mach-visws/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 #define MB (1024 * 1024)
   7
   8 unsigned long sgivwfb_mem_phys;
   9 unsigned long sgivwfb_mem_size;
  10
  11 long long mem_size __initdata = 0;
  12
  13 static char * __init machine_specific_memory_setup(void)
  14 {
  15         long long gfx_mem_size = 8 * MB;
  16
  17         mem_size = ALT_MEM_K;
  18
  19         if (!mem_size) {
  20                 printk(KERN_WARNING "Bootloader didn't set memory size, upgrade it !\n");
  21                 mem_size = 128 * MB;
  22         }
  23
  24         /*
  25          * this hardcodes the graphics memory to 8 MB
  26          * it really should be sized dynamically (or at least
  27          * set as a boot param)
  28          */
  29         if (!sgivwfb_mem_size) {
  30                 printk(KERN_WARNING "Defaulting to 8 MB framebuffer size\n");
  31                 sgivwfb_mem_size = 8 * MB;
  32         }
  33
  34         /*
  35          * Trim to nearest MB
  36          */
  37         sgivwfb_mem_size &= ~((1 << 20) - 1);
  38         sgivwfb_mem_phys = mem_size - gfx_mem_size;
  39
  40         add_memory_region(0, LOWMEMSIZE(), E820_RAM);
  41         add_memory_region(HIGH_MEMORY, mem_size - sgivwfb_mem_size - HIGH_MEMORY, E820_RAM);
  42         add_memory_region(sgivwfb_mem_phys, sgivwfb_mem_size, E820_RESERVED);
  43
  44         return "PROM";
  45
  46         /* Remove gcc warnings */
  47         (void) sanitize_e820_map(NULL, NULL);
  48         (void) copy_e820_map(NULL, 0);
  49 }