raminit_shared.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <console/console.h>
#include <device/mmio.h>
#include <types.h>
 
#include "sandybridge.h"
 
static const char *const ecc_decoder[] = {
        "inactive",
        "active on IO",
        "disabled on IO",
        "active",
};
 
#define ON_OFF(val) (((val) & 1) ? "on" : "off")
 
/* Print the memory controller configuration as read from the memory controller registers. */
void report_memory_config(void)
{
        u32 addr_decoder_common, addr_decode_ch[2];
        int i;
 
        addr_decoder_common = mchbar_read32(MAD_CHNL);
        addr_decode_ch[0]   = mchbar_read32(MAD_DIMM_CH0);
        addr_decode_ch[1]   = mchbar_read32(MAD_DIMM_CH1);
 
        const int refclk = mchbar_read32(MC_BIOS_REQ) & 0x100 ? 100 : 133;
 
        printk(BIOS_DEBUG, "memcfg DDR3 ref clock %d MHz\n", refclk);
        printk(BIOS_DEBUG, "memcfg DDR3 clock %d MHz\n",
               (mchbar_read32(MC_BIOS_DATA) * refclk * 100 * 2 + 50) / 100);
 
        printk(BIOS_DEBUG, "memcfg channel assignment: A: %d, B % d, C % d\n",
               (addr_decoder_common >> 0) & 3,
               (addr_decoder_common >> 2) & 3,
               (addr_decoder_common >> 4) & 3);
 
        for (i = 0; i < ARRAY_SIZE(addr_decode_ch); i++) {
                u32 ch_conf = addr_decode_ch[i];
                printk(BIOS_DEBUG, "memcfg channel[%d] config (%8.8x):\n", i, ch_conf);
                printk(BIOS_DEBUG, "   ECC %s\n", ecc_decoder[(ch_conf >> 24) & 3]);
                printk(BIOS_DEBUG, "   enhanced interleave mode %s\n", ON_OFF(ch_conf >> 22));
                printk(BIOS_DEBUG, "   rank interleave %s\n", ON_OFF(ch_conf >> 21));
                printk(BIOS_DEBUG, "   DIMMA %d MB width x%d %s rank%s\n",
                       ((ch_conf >>  0) & 0xff) * 256,
                       ((ch_conf >> 19) & 1) ? 16 : 8,
                       ((ch_conf >> 17) & 1) ? "dual" : "single",
                       ((ch_conf >> 16) & 1) ? "" : ", selected");
                printk(BIOS_DEBUG, "   DIMMB %d MB width x%d %s rank%s\n",
                       ((ch_conf >>  8) & 0xff) * 256,
                       ((ch_conf >> 20) & 1) ? 16 : 8,
                       ((ch_conf >> 18) & 1) ? "dual" : "single",
                       ((ch_conf >> 16) & 1) ? ", selected" : "");
        }
}
#undef ON_OFF