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system76-coreboot/util/inteltool/ivy_memory.c
Angel Pons 121d2de18d util/inteltool/ivy_memory.c: Do not rely on MR0 values 
MR0 may not always be programmed in the training result registers. Thus,
do not rely on its values. Also account for per-channel differences.

Change-Id: Iaf3b545ea55735b46caf1bd62d5859f2b3efa159
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47750
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
2020-11-22 22:14:26 +00:00

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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <errno.h>
#include "inteltool.h"
extern volatile uint8_t *mchbar;
static uint32_t read_mchbar32(uint32_t addr)
{
return *(volatile uint32_t *)(mchbar + addr);
}
static void
print_time(const char *string, unsigned long long time, unsigned long long tCK)
{
printf(".%s = %lld /* %lld clocks = %.3lf ns */,\n",
string, time, time, (time * tCK) / 256.0);
}
static unsigned int
make_spd_time(unsigned long long time, unsigned long long tCK)
{
return (time * tCK) >> 5;
}
static u16 spd_ddr3_calc_crc(u8 * spd)
{
int n_crc, i;
u8 *ptr;
u16 crc;
/* Find the number of bytes covered by CRC */
if (spd[0] & 0x80) {
n_crc = 117;
} else {
n_crc = 126;
}
/* Compute the CRC */
crc = 0;
ptr = spd;
while (--n_crc >= 0) {
crc = crc ^ (int)*ptr++ << 8;
for (i = 0; i < 8; ++i)
if (crc & 0x8000) {
crc = crc << 1 ^ 0x1021;
} else {
crc = crc << 1;
}
}
return crc;
}
void ivybridge_dump_timings(const char *dump_spd_file)
{
u32 mr0[2];
u32 mr1[2];
u32 reg;
unsigned int CAS[2] = { 0 };
int tWR = 0, tRFC = 0;
int tFAW[2], tWTR[2], tCKE[2], tRTP[2], tRRD[2];
int channel, slot;
u32 reg_4004_b30[2] = { 0, 0 };
unsigned int tREFI;
int rankmap[2];
u32 mad_dimm[2];
unsigned int tRCD[2], tXP[2], tXPDLL[2], tRAS[2], tCWL[2], tRP[2],
tAONPD[2];
unsigned int tXSOffset;
int two_channels = 1;
struct slot_info {
unsigned int size_mb;
unsigned int ranks;
unsigned int width;
} slots[2][2];
unsigned int tCK;
u8 spd[2][2][256];
memset(slots, 0, sizeof(slots));
for (channel = 0; channel < 2; channel++) {
rankmap[channel] = read_mchbar32(0xc14 + 0x100 * channel) >> 24;
}
if ((rankmap[0] == 0) && (rankmap[1] == 0)) {
fputs("Error: no memory channels found\n", stderr);
exit(1);
}
two_channels = rankmap[0] && rankmap[1];
mr0[0] = read_mchbar32(0x0004);
mr1[0] = read_mchbar32(0x0008);
mr0[1] = read_mchbar32(0x0104);
mr1[1] = read_mchbar32(0x0108);
if (mr0[0] != mr0[1] && two_channels)
printf("MR0 mismatch: %x, %x\n", mr0[0], mr0[1]);
if (mr1[0] != mr1[1] && two_channels)
printf("MR1 mismatch: %x, %x\n", mr1[0], mr1[1]);
reg = read_mchbar32(0x5e00) & ~0x80000000;
printf(" .tCK = TCK_MHZ%d,\n", 400 * reg / 3);
tCK = (64 * 10 * 3) / reg;
for (channel = 0; channel < 2; channel++) {
mad_dimm[channel] = read_mchbar32(0x5004 + 4 * channel);
if (mr0[channel]) {
if (mr0[channel] & 1) {
CAS[channel] = ((mr0[channel] >> 4) & 0x7) + 12;
} else {
CAS[channel] = ((mr0[channel] >> 4) & 0x7) + 4;
}
}
}
printf(".rankmap = { 0x%x, 0x%x },\n", rankmap[0], rankmap[1]);
printf(".mad_dimm = { 0x%x, 0x%x },\n", mad_dimm[0], mad_dimm[1]);
for (channel = 0; channel < 2; channel++)
if (rankmap[channel]) {
int ctWR;
static const u8 mr0_wr_t[12] =
{ 1, 2, 3, 4, 0, 5, 0, 6, 0, 7, 0, 0 };
reg = read_mchbar32(0x4004 + 0x400 * channel);
ctWR = (reg >> 24) & 0x3f;
if (tWR && ctWR != tWR)
printf("/* tWR mismatch: %d, %d */\n", tWR,
ctWR);
if (!tWR)
tWR = ctWR;
if (mr0[channel] && ((mr0[channel] >> 9) & 7) != mr0_wr_t[tWR - 5])
printf("/* encoded tWR mismatch: %d, %d */\n",
((mr0[channel] >> 9) & 7),
mr0_wr_t[tWR - 5]);
reg_4004_b30[channel] = reg >> 30;
tFAW[channel] = (reg >> 16) & 0xff;
tWTR[channel] = (reg >> 12) & 0xf;
tCKE[channel] = (reg >> 8) & 0xf;
tRTP[channel] = (reg >> 4) & 0xf;
tRRD[channel] = (reg >> 0) & 0xf;
reg = read_mchbar32(0x4000 + 0x400 * channel);
tRAS[channel] = reg >> 16;
tCWL[channel] = (reg >> 12) & 0xf;
if (CAS[channel]) {
if (CAS[channel] != ((reg >> 8) & 0xf))
printf("/* CAS mismatch: %d, %d. */\n", CAS[channel],
(reg >> 8) & 0xf);
} else {
CAS[channel] = (reg >> 8) & 0xf;
}
tRP[channel] = (reg >> 4) & 0xf;
tRCD[channel] = reg & 0xf;
reg = read_mchbar32(0x400c + channel * 0x400);
tXPDLL[channel] = reg & 0x1f;
tXP[channel] = (reg >> 5) & 7;
tAONPD[channel] = (reg >> 8) & 0xf;
}
printf(".mobile = %d,\n", (mr0[0] >> 12) & 1);
if (two_channels && CAS[0] != CAS[1])
printf("/* CAS mismatch: %d, %d */\n", CAS[0], CAS[1]);
print_time("CAS", CAS[0], tCK);
print_time("tWR", tWR, tCK);
printf(".reg_4004_b30 = { %d, %d },\n", reg_4004_b30[0],
reg_4004_b30[1]);
channel = (rankmap[0] != 0) ? 0 : 1;
if (two_channels && tFAW[0] != tFAW[1])
printf("/* tFAW mismatch: %d, %d */\n", tFAW[0], tFAW[1]);
print_time("tFAW", tFAW[channel], tCK);
if (two_channels && tWTR[0] != tWTR[1])
printf("/* tWTR mismatch: %d, %d */\n", tWTR[0], tWTR[1]);
print_time("tWTR", tWTR[channel], tCK);
if (two_channels && tCKE[0] != tCKE[1])
printf("/* tCKE mismatch: %d, %d */\n", tCKE[0], tCKE[1]);
print_time("tCKE", tCKE[channel], tCK);
if (two_channels && tRTP[0] != tRTP[1])
printf("/* tRTP mismatch: %d, %d */\n", tRTP[0], tRTP[1]);
print_time("tRTP", tRTP[channel], tCK);
if (two_channels && tRRD[0] != tRRD[1])
printf("/* tRRD mismatch: %d, %d */\n", tRRD[0], tRRD[1]);
print_time("tRRD", tRRD[channel], tCK);
if (two_channels && tRAS[0] != tRAS[1])
printf("/* tRAS mismatch: %d, %d */\n", tRAS[0], tRAS[1]);
print_time("tRAS", tRAS[channel], tCK);
if (two_channels && tCWL[0] != tCWL[1])
printf("/* tCWL mismatch: %d, %d */\n", tCWL[0], tCWL[1]);
print_time("tCWL", tCWL[channel], tCK);
if (two_channels && tRP[0] != tRP[1])
printf("/* tRP mismatch: %d, %d */\n", tRP[0], tRP[1]);
print_time("tRP", tRP[channel], tCK);
if (two_channels && tRCD[0] != tRCD[1])
printf("/* tRCD mismatch: %d, %d */\n", tRCD[0], tRCD[1]);
print_time("tRCD", tRCD[channel], tCK);
if (two_channels && tXPDLL[0] != tXPDLL[1])
printf("/* tXPDLL mismatch: %d, %d */\n", tXPDLL[0], tXPDLL[1]);
print_time("tXPDLL", tXPDLL[channel], tCK);
if (two_channels && tXP[0] != tXP[1])
printf("/* tXP mismatch: %d, %d */\n", tXP[0], tXP[1]);
print_time("tXP", tXP[channel], tCK);
if (two_channels && tAONPD[0] != tAONPD[1])
printf("/* tAONPD mismatch: %d, %d */\n", tAONPD[0], tAONPD[1]);
print_time("tAONPD", tAONPD[channel], tCK);
reg = read_mchbar32(0x4298);
if (reg != read_mchbar32(0x4698) && two_channels)
printf("/* 4298 mismatch: %d, %d */\n", reg,
read_mchbar32(0x4698));
tREFI = reg & 0xffff;
print_time("tREFI", tREFI, tCK);
if ((tREFI * 9 / 1024) != (reg >> 25))
printf("/* tREFI mismatch: %d, %d */\n", tREFI * 9 / 1024,
(reg >> 25));
tRFC = (reg >> 16) & 0x1ff;
print_time("tRFC", tRFC, tCK);
reg = read_mchbar32(0x42a4);
if (reg != read_mchbar32(0x46a4) && two_channels)
printf("/* 42a4 mismatch: %d, %d */\n", reg,
read_mchbar32(0x46a4));
print_time("tMOD", 8 + ((reg >> 28) & 0xf), tCK);
tXSOffset = 512 - ((reg >> 16) & 0x3ff);
print_time("tXSOffset", tXSOffset, tCK);
if (tXSOffset != ((reg >> 12) & 0xf))
printf("/* tXSOffset mismatch: %d, %d */\n",
tXSOffset, (reg >> 12) & 0xf);
if (512 != (reg & 0xfff))
printf("/* tDLLK mismatch: %d, %d */\n", 512, reg & 0xfff);
reg = read_mchbar32(0x5064);
printf(".reg5064b0 = 0x%x,\n", reg & 0xfff);
if ((reg >> 12) != 0x73)
printf("/* mismatch 0x%x, 0x73. */\n", reg << 12);
unsigned int ch0size, ch1size;
switch (read_mchbar32(0x5000)) {
case 0x24:
reg = read_mchbar32(0x5014);
ch1size = reg >> 24;
if (((reg >> 16) & 0xff) != 2 * ch1size)
printf("/* ch1size mismatch: %d, %d*/\n",
2 * ch1size, ((ch1size >> 16) & 0xff));
printf(".channel_size_mb = { ?, %d },\n", ch1size * 256);
break;
case 0x21:
reg = read_mchbar32(0x5014);
ch0size = reg >> 24;
if (((reg >> 16) & 0xff) != 2 * ch0size)
printf("/* ch0size mismatch: %d, %d*/\n",
2 * ch0size, ((ch0size >> 16) & 0xff));
printf(".channel_size_mb = { %d, ? },\n", ch0size * 256);
break;
}
for (channel = 0; channel < 2; channel++) {
reg = mad_dimm[channel];
int swap = (reg >> 16) & 1;
slots[channel][swap].size_mb = (reg & 0xff) * 256;
slots[channel][swap].ranks = 1 + ((reg >> 17) & 1);
slots[channel][swap].width = 8 + 8 * ((reg >> 19) & 1);
slots[channel][!swap].size_mb = ((reg >> 8) & 0xff) * 256;
slots[channel][!swap].ranks = 1 + ((reg >> 18) & 1);
slots[channel][!swap].width = 8 + 8 * ((reg >> 20) & 1);
}
/* Undetermined: rank mirror, other modes, asr, ext_temp. */
memset(spd, 0, sizeof(spd));
for (channel = 0; channel < 2; channel++)
for (slot = 0; slot < 2; slot++)
if (slots[channel][slot].size_mb) {
printf("/* CH%dS%d: %d MiB */\n", channel,
slot, slots[channel][slot].size_mb);
}
for (channel = 0; channel < 2; channel++)
for (slot = 0; slot < 2; slot++)
if (slots[channel][slot].size_mb) {
int capacity_shift;
unsigned int ras, rc, rfc, faw;
u16 crc;
capacity_shift =
ffs(slots[channel][slot].size_mb *
slots[channel][slot].width /
(slots[channel][slot].ranks * 64)) - 1 -
5;
spd[channel][slot][0] = 0x92;
spd[channel][slot][1] = 0x11;
spd[channel][slot][2] = 0xb; /* DDR3 */
spd[channel][slot][3] = 3; /* SODIMM, should we use another type for desktop? */
spd[channel][slot][4] = capacity_shift | 0; /* 8 Banks. */
spd[channel][slot][5] = 0; /* FIXME */
spd[channel][slot][6] = 0; /* FIXME */
spd[channel][slot][7] =
((slots[channel][slot].ranks -
1) << 3) | (ffs(slots[channel][slot].
width) - 1 - 2);
spd[channel][slot][8] = 3; /* Bus width 64b. No ECC yet. */
spd[channel][slot][9] = 0x52; /* 2.5ps. FIXME: choose dynamically if needed. */
spd[channel][slot][10] = 0x01;
spd[channel][slot][11] = 0x08; /* 1/8 ns. FIXME: choose dynamically if needed. */
spd[channel][slot][12] = make_spd_time(1, tCK);
spd[channel][slot][13] = 0;
spd[channel][slot][14] =
(1 << (CAS[channel] - 4)) & 0xff;
spd[channel][slot][15] = (1 << (CAS[channel] - 4)) >> 8;
spd[channel][slot][16] =
make_spd_time(CAS[channel], tCK);
spd[channel][slot][17] =
make_spd_time(tWR, tCK);
spd[channel][slot][18] =
make_spd_time(tRCD[channel], tCK);
spd[channel][slot][19] =
make_spd_time(tRRD[channel], tCK);
spd[channel][slot][20] =
make_spd_time(tRP[channel], tCK);
ras = make_spd_time(tRAS[channel], tCK);
rc = 0x181; /* FIXME: should be make_spd_time(tRC, tCK). */
spd[channel][slot][22] = ras;
spd[channel][slot][23] = rc;
spd[channel][slot][21] =
((ras >> 8) & 0xf) | ((rc >> 4) & 0xf0);
rfc = make_spd_time(tRFC, tCK);
spd[channel][slot][24] = rfc;
spd[channel][slot][25] = rfc >> 8;
spd[channel][slot][26] =
make_spd_time(tWTR[channel], tCK);
spd[channel][slot][27] =
make_spd_time(tRTP[channel], tCK);
faw = make_spd_time(tFAW[channel], tCK);
spd[channel][slot][28] = faw >> 8;
spd[channel][slot][29] = faw;
spd[channel][slot][30] = 0; /* FIXME */
spd[channel][slot][31] = 0; /* FIXME */
spd[channel][slot][32] = 0; /* FIXME */
spd[channel][slot][33] = 0; /* FIXME */
spd[channel][slot][62] = 0x65; /* Reference card F. FIXME */
spd[channel][slot][63] = 0; /* FIXME */
crc = spd_ddr3_calc_crc(spd[channel][slot]);
spd[channel][slot][126] = crc;
spd[channel][slot][127] = crc >> 8;
}
printf("/* SPD matching current mode: */\n");
FILE *dump_spd = NULL;
if (dump_spd_file) {
dump_spd = fopen (dump_spd_file, "wb");
if (!dump_spd) {
fprintf (stderr, "Couldn't open file %s: %s\n", dump_spd_file,
strerror (errno));
exit (1);
}
}
for (channel = 0; channel < 2; channel++)
for (slot = 0; slot < 2; slot++)
{
if (slots[channel][slot].size_mb) {
int i;
printf("/* CH%dS%d */\n", channel, slot);
for (i = 0; i < 256; i++) {
if ((i & 0xf) == 0x0)
printf("%02x: ", i);
printf("%02x ", spd[channel][slot][i]);
if ((i & 0xf) == 0xf)
printf("\n");
}
printf("\n");
if (dump_spd) {
fwrite(spd[channel][slot], 1, 256, dump_spd);
}
} else {
if (dump_spd) {
char zero[256];
memset (zero, 0, 256);
fwrite(zero, 1, 256, dump_spd);
}
}
}
if (dump_spd) {
fclose (dump_spd);
}
}
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