src/lib/generic_sdram.c

   1 #include <lib.h> /* Prototypes */
   2
   3 /* Setup SDRAM */
   4 #if CONFIG_RAMINIT_SYSINFO
   5 void sdram_initialize(int controllers, const struct mem_controller *ctrl, void *sysinfo)
   6 #else
   7 void sdram_initialize(int controllers, const struct mem_controller *ctrl)
   8 #endif
   9 {
  10         int i;
  11         /* Set the registers we can set once to reasonable values */
  12         for(i = 0; i < controllers; i++) {
  13                 printk(BIOS_DEBUG, "Ram1.%02x\n", i);
  14
  15         #if CONFIG_RAMINIT_SYSINFO
  16                 sdram_set_registers(ctrl + i, sysinfo);
  17         #else
  18                 sdram_set_registers(ctrl + i);
  19         #endif
  20         }
  21
  22         /* Now setup those things we can auto detect */
  23         for(i = 0; i < controllers; i++) {
  24                 printk(BIOS_DEBUG, "Ram2.%02x\n", i);
  25
  26         #if CONFIG_RAMINIT_SYSINFO
  27                 sdram_set_spd_registers(ctrl + i, sysinfo);
  28         #else
  29                 sdram_set_spd_registers(ctrl + i);
  30         #endif
  31
  32         }
  33
  34         /* Now that everything is setup enable the SDRAM.
  35          * Some chipsets do the work for us while on others
  36          * we need to it by hand.
  37          */
  38         printk(BIOS_DEBUG, "Ram3\n");
  39
  40         #if CONFIG_RAMINIT_SYSINFO
  41         sdram_enable(controllers, ctrl, sysinfo);
  42         #else
  43         sdram_enable(controllers, ctrl);
  44         #endif
  45
  46         printk(BIOS_DEBUG, "Ram4\n");
  47 }