src/northbridge/intel/sandybridge/raminit_shared.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <console/console.h>
   4 #include <device/mmio.h>
   5 #include <types.h>
   6
   7 #include "sandybridge.h"
   8
   9 static const char *const ecc_decoder[] = {
  10         "inactive",
  11         "active on IO",
  12         "disabled on IO",
  13         "active",
  14 };
  15
  16 #define ON_OFF(val) (((val) & 1) ? "on" : "off")
  17
  18 /* Print the memory controller configuration as read from the memory controller registers. */
  19 void report_memory_config(void)
  20 {
  21         u32 addr_decoder_common, addr_decode_ch[2];
  22         int i;
  23
  24         addr_decoder_common = mchbar_read32(MAD_CHNL);
  25         addr_decode_ch[0]   = mchbar_read32(MAD_DIMM_CH0);
  26         addr_decode_ch[1]   = mchbar_read32(MAD_DIMM_CH1);
  27
  28         const int refclk = mchbar_read32(MC_BIOS_REQ) & 0x100 ? 100 : 133;
  29
  30         printk(BIOS_DEBUG, "memcfg DDR3 ref clock %d MHz\n", refclk);
  31         printk(BIOS_DEBUG, "memcfg DDR3 clock %d MHz\n",
  32                DIV_ROUND_CLOSEST(mchbar_read32(MC_BIOS_DATA) * refclk * 100 * 2, 100));
  33
  34         printk(BIOS_DEBUG, "memcfg channel assignment: A: %d, B % d, C % d\n",
  35                (addr_decoder_common >> 0) & 3,
  36                (addr_decoder_common >> 2) & 3,
  37                (addr_decoder_common >> 4) & 3);
  38
  39         for (i = 0; i < ARRAY_SIZE(addr_decode_ch); i++) {
  40                 u32 ch_conf = addr_decode_ch[i];
  41                 printk(BIOS_DEBUG, "memcfg channel[%d] config (%8.8x):\n", i, ch_conf);
  42                 printk(BIOS_DEBUG, "   ECC %s\n", ecc_decoder[(ch_conf >> 24) & 3]);
  43                 printk(BIOS_DEBUG, "   enhanced interleave mode %s\n", ON_OFF(ch_conf >> 22));
  44                 printk(BIOS_DEBUG, "   rank interleave %s\n", ON_OFF(ch_conf >> 21));
  45                 printk(BIOS_DEBUG, "   DIMMA %d MB width x%d %s rank%s\n",
  46                        ((ch_conf >>  0) & 0xff) * 256,
  47                        ((ch_conf >> 19) & 1) ? 16 : 8,
  48                        ((ch_conf >> 17) & 1) ? "dual" : "single",
  49                        ((ch_conf >> 16) & 1) ? "" : ", selected");
  50                 printk(BIOS_DEBUG, "   DIMMB %d MB width x%d %s rank%s\n",
  51                        ((ch_conf >>  8) & 0xff) * 256,
  52                        ((ch_conf >> 20) & 1) ? 16 : 8,
  53                        ((ch_conf >> 18) & 1) ? "dual" : "single",
  54                        ((ch_conf >> 16) & 1) ? ", selected" : "");
  55         }
  56 }
  57 #undef ON_OFF