/* 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); } }