/* SPDX-License-Identifier: GPL-2.0-only */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "gm45.h" #include "chip.h" static const gmch_gfx_t gmch_gfx_types[][5] = { /* MAX_667MHz MAX_533MHz MAX_400MHz MAX_333MHz MAX_800MHz */ { GMCH_UNKNOWN, GMCH_UNKNOWN, GMCH_UNKNOWN, GMCH_UNKNOWN, GMCH_UNKNOWN }, { GMCH_GM47, GMCH_GM45, GMCH_UNKNOWN, GMCH_UNKNOWN, GMCH_GM49 }, { GMCH_GE45, GMCH_GE45, GMCH_GE45, GMCH_GE45, GMCH_GE45 }, { GMCH_UNKNOWN, GMCH_GL43, GMCH_GL40, GMCH_UNKNOWN, GMCH_UNKNOWN }, { GMCH_UNKNOWN, GMCH_GS45, GMCH_GS40, GMCH_UNKNOWN, GMCH_UNKNOWN }, { GMCH_UNKNOWN, GMCH_UNKNOWN, GMCH_UNKNOWN, GMCH_UNKNOWN, GMCH_UNKNOWN }, { GMCH_UNKNOWN, GMCH_UNKNOWN, GMCH_UNKNOWN, GMCH_UNKNOWN, GMCH_UNKNOWN }, { GMCH_PM45, GMCH_PM45, GMCH_PM45, GMCH_PM45, GMCH_PM45 }, }; void get_gmch_info(sysinfo_t *sysinfo) { sysinfo->stepping = pci_read_config8(PCI_DEV(0, 0, 0), PCI_CLASS_REVISION); if ((sysinfo->stepping > STEPPING_B3) && (sysinfo->stepping != STEPPING_CONVERSION_A1)) die("Unknown stepping.\n"); if (sysinfo->stepping <= STEPPING_B3) printk(BIOS_DEBUG, "Stepping %c%d\n", 'A' + sysinfo->stepping / 4, sysinfo->stepping % 4); else printk(BIOS_DEBUG, "Conversion stepping A1\n"); const u32 eax = cpuid_ext(0x04, 0).eax; sysinfo->cores = ((eax >> 26) & 0x3f) + 1; printk(BIOS_SPEW, "%d CPU cores\n", sysinfo->cores); u32 capid = pci_read_config16(PCI_DEV(0, 0, 0), D0F0_CAPID0+8); if (!(capid & (1<<(79-64)))) { printk(BIOS_SPEW, "iTPM enabled\n"); } capid = pci_read_config32(PCI_DEV(0, 0, 0), D0F0_CAPID0+4); if (!(capid & (1<<(57-32)))) { printk(BIOS_SPEW, "ME enabled\n"); } if (!(capid & (1<<(56-32)))) { printk(BIOS_SPEW, "AMT enabled\n"); } sysinfo->max_ddr2_mhz = (capid & (1<<(53-32)))?667:800; printk(BIOS_SPEW, "capable of DDR2 of %d MHz or lower\n", sysinfo->max_ddr2_mhz); if (!(capid & (1<<(48-32)))) { printk(BIOS_SPEW, "VT-d enabled\n"); } const u32 gfx_variant = (capid>>(42-32)) & 0x7; const u32 render_freq = ((capid>>(50-32) & 0x1) << 2) | ((capid>>(35-32)) & 0x3); if (render_freq <= 4) sysinfo->gfx_type = gmch_gfx_types[gfx_variant][render_freq]; else sysinfo->gfx_type = GMCH_UNKNOWN; switch (sysinfo->gfx_type) { case GMCH_GM45: printk(BIOS_SPEW, "GMCH: GM45\n"); break; case GMCH_GM47: printk(BIOS_SPEW, "GMCH: GM47\n"); break; case GMCH_GM49: printk(BIOS_SPEW, "GMCH: GM49\n"); break; case GMCH_GE45: printk(BIOS_SPEW, "GMCH: GE45\n"); break; case GMCH_GL40: printk(BIOS_SPEW, "GMCH: GL40\n"); break; case GMCH_GL43: printk(BIOS_SPEW, "GMCH: GL43\n"); break; case GMCH_GS40: printk(BIOS_SPEW, "GMCH: GS40\n"); break; case GMCH_GS45: printk(BIOS_SPEW, "GMCH: GS45, using %s-power mode\n", sysinfo->gs45_low_power_mode ? "low" : "high"); break; case GMCH_PM45: printk(BIOS_SPEW, "GMCH: PM45\n"); break; case GMCH_UNKNOWN: printk(BIOS_SPEW, "unknown GMCH\n"); break; } sysinfo->txt_enabled = !(capid & (1 << (37-32))); if (sysinfo->txt_enabled) { printk(BIOS_SPEW, "TXT enabled\n"); } switch (render_freq) { case 4: sysinfo->max_render_mhz = 800; break; case 0: sysinfo->max_render_mhz = 667; break; case 1: sysinfo->max_render_mhz = 533; break; case 2: sysinfo->max_render_mhz = 400; break; case 3: sysinfo->max_render_mhz = 333; break; default: printk(BIOS_SPEW, "Unknown render frequency\n"); sysinfo->max_render_mhz = 0; break; } if (sysinfo->max_render_mhz != 0) { printk(BIOS_SPEW, "Render frequency: %d MHz\n", sysinfo->max_render_mhz); } if (!(capid & (1<<(33-32)))) { printk(BIOS_SPEW, "IGD enabled\n"); } if (!(capid & (1<<(32-32)))) { printk(BIOS_SPEW, "PCIe-to-GMCH enabled\n"); } capid = pci_read_config32(PCI_DEV(0, 0, 0), D0F0_CAPID0); u32 ddr_cap = capid>>30 & 0x3; switch (ddr_cap) { case 0: sysinfo->max_ddr3_mt = 1067; break; case 1: sysinfo->max_ddr3_mt = 800; break; case 2: case 3: printk(BIOS_SPEW, "GMCH not DDR3 capable\n"); sysinfo->max_ddr3_mt = 0; break; } if (sysinfo->max_ddr3_mt != 0) { printk(BIOS_SPEW, "GMCH supports DDR3 with %d MT or less\n", sysinfo->max_ddr3_mt); } const unsigned int max_fsb = (capid >> 28) & 0x3; switch (max_fsb) { case 1: sysinfo->max_fsb_mhz = 1067; break; case 2: sysinfo->max_fsb_mhz = 800; break; case 3: sysinfo->max_fsb_mhz = 667; break; default: die("unknown FSB capability\n"); break; } if (sysinfo->max_fsb_mhz != 0) { printk(BIOS_SPEW, "GMCH supports FSB with up to %d MHz\n", sysinfo->max_fsb_mhz); } sysinfo->max_fsb = max_fsb - 1; } /* * Detect if the system went through an interrupted RAM init or is incon- * sistent. If so, initiate a cold reboot. Otherwise mark the system to be * in RAM init, so this function would detect it on an erroneous reboot. */ void enter_raminit_or_reset(void) { /* Interrupted RAM init or inconsistent system? */ u8 reg8 = pci_read_config8(PCI_DEV(0, 0x1f, 0), 0xa2); if (reg8 & (1 << 2)) { /* S4-assertion-width violation */ /* Ignore S4-assertion-width violation like original BIOS. */ printk(BIOS_WARNING, "Ignoring S4-assertion-width violation.\n"); /* Bit2 is R/WC, so it will clear itself below. */ } if (reg8 & (1 << 7)) { /* interrupted RAM init */ /* Don't enable S4-assertion stretch. Makes trouble on roda/rk9. reg8 = pci_read_config8(PCI_DEV(0, 0x1f, 0), 0xa4); pci_write_config8(PCI_DEV(0, 0x1f, 0), 0xa4, reg8 | 0x08); */ /* Clear bit7. */ pci_write_config8(PCI_DEV(0, 0x1f, 0), 0xa2, reg8 & ~(1 << 7)); printk(BIOS_INFO, "Interrupted RAM init, reset required.\n"); gm45_early_reset(); } /* Mark system to be in RAM init. */ pci_write_config8(PCI_DEV(0, 0x1f, 0), 0xa2, reg8 | (1 << 7)); } /* For a detected DIMM, test the value of an SPD byte to match the expected value after masking some bits. */ static int test_dimm(sysinfo_t *const sysinfo, int dimm, int addr, int bitmask, int expected) { return (smbus_read_byte(sysinfo->spd_map[dimm], addr) & bitmask) == expected; } /* This function dies if dimm is unsuitable for the chipset. */ static void verify_ddr3_dimm(sysinfo_t *const sysinfo, int dimm) { if (!test_dimm(sysinfo, dimm, 3, 15, 3)) die("Chipset only supports SO-DIMM\n"); if (!test_dimm(sysinfo, dimm, 8, 0x18, 0)) die("Chipset doesn't support ECC RAM\n"); if (!test_dimm(sysinfo, dimm, 7, 0x38, 0) && !test_dimm(sysinfo, dimm, 7, 0x38, 8)) die("Chipset wants single or double sided DIMMs\n"); if (!test_dimm(sysinfo, dimm, 7, 7, 1) && !test_dimm(sysinfo, dimm, 7, 7, 2)) die("Chipset requires x8 or x16 width\n"); if (!test_dimm(sysinfo, dimm, 4, 0x0f, 0) && !test_dimm(sysinfo, dimm, 4, 0x0f, 1) && !test_dimm(sysinfo, dimm, 4, 0x0f, 2) && !test_dimm(sysinfo, dimm, 4, 0x0f, 3)) die("Chipset requires 256Mb, 512Mb, 1Gb or 2Gb chips."); if (!test_dimm(sysinfo, dimm, 4, 0x70, 0)) die("Chipset requires 8 banks on DDR3\n"); /* How to check if burst length is 8? Other values are not supported, are they even possible? */ if (!test_dimm(sysinfo, dimm, 10, 0xff, 1)) die("Code assumes 1/8ns MTB\n"); if (!test_dimm(sysinfo, dimm, 11, 0xff, 8)) die("Code assumes 1/8ns MTB\n"); if (!test_dimm(sysinfo, dimm, 62, 0x9f, 0) && !test_dimm(sysinfo, dimm, 62, 0x9f, 1) && !test_dimm(sysinfo, dimm, 62, 0x9f, 2) && !test_dimm(sysinfo, dimm, 62, 0x9f, 3) && !test_dimm(sysinfo, dimm, 62, 0x9f, 5)) die("Only raw card types A, B, C, D and F are supported.\n"); } /* For every detected DIMM, test if it's suitable for the chipset. */ static void verify_ddr3(sysinfo_t *const sysinfo, int mask) { int cur = 0; while (mask) { if (mask & 1) { verify_ddr3_dimm(sysinfo, cur); } mask >>= 1; cur++; } } typedef struct { int dimm_mask; struct { unsigned int rows; unsigned int cols; unsigned int chip_capacity; unsigned int banks; unsigned int ranks; unsigned int cas_latencies; unsigned int tAAmin; unsigned int tCKmin; unsigned int width; unsigned int tRAS; unsigned int tRP; unsigned int tRCD; unsigned int tWR; unsigned int page_size; unsigned int raw_card; } channel[2]; } spdinfo_t; /* * This function collects RAM characteristics from SPD, assuming that RAM * is generally within chipset's requirements, since verify_ddr3() passed. */ static void collect_ddr3(sysinfo_t *const sysinfo, spdinfo_t *const config) { int mask = config->dimm_mask; int cur = 0; while (mask != 0) { /* FIXME: support several dimms on same channel. */ if ((mask & 1) && sysinfo->spd_map[2 * cur]) { int tmp; const int smb_addr = sysinfo->spd_map[2 * cur]; config->channel[cur].rows = ((smbus_read_byte(smb_addr, 5) >> 3) & 7) + 12; config->channel[cur].cols = (smbus_read_byte(smb_addr, 5) & 7) + 9; config->channel[cur].chip_capacity = smbus_read_byte(smb_addr, 4) & 0xf; config->channel[cur].banks = 8; /* GM45 only accepts this for DDR3. verify_ddr3() fails for other values. */ config->channel[cur].ranks = ((smbus_read_byte(smb_addr, 7) >> 3) & 7) + 1; config->channel[cur].cas_latencies = ((smbus_read_byte(smb_addr, 15) << 8) | smbus_read_byte(smb_addr, 14)) << 4; /* so bit x is CAS x */ config->channel[cur].tAAmin = smbus_read_byte(smb_addr, 16); /* in MTB */ config->channel[cur].tCKmin = smbus_read_byte(smb_addr, 12); /* in MTB */ config->channel[cur].width = smbus_read_byte(smb_addr, 7) & 7; config->channel[cur].page_size = config->channel[cur].width * (1 << config->channel[cur].cols); /* in Bytes */ tmp = smbus_read_byte(smb_addr, 21); config->channel[cur].tRAS = smbus_read_byte(smb_addr, 22) | ((tmp & 0xf) << 8); config->channel[cur].tRP = smbus_read_byte(smb_addr, 20); config->channel[cur].tRCD = smbus_read_byte(smb_addr, 18); config->channel[cur].tWR = smbus_read_byte(smb_addr, 17); config->channel[cur].raw_card = smbus_read_byte(smb_addr, 62) & 0x1f; } cur++; mask >>= 2; } } static fsb_clock_t read_fsb_clock(void) { switch (mchbar_read32(CLKCFG_MCHBAR) & CLKCFG_FSBCLK_MASK) { case 6: return FSB_CLOCK_1067MHz; case 2: return FSB_CLOCK_800MHz; case 3: return FSB_CLOCK_667MHz; default: die("Unsupported FSB clock.\n"); } } static mem_clock_t clock_index(const unsigned int clock) { switch (clock) { case 533: return MEM_CLOCK_533MHz; case 400: return MEM_CLOCK_400MHz; case 333: return MEM_CLOCK_333MHz; default: die("Unknown clock value.\n"); } return -1; /* Won't be reached. */ } static void normalize_clock(unsigned int *const clock) { if (*clock >= 533) *clock = 533; else if (*clock >= 400) *clock = 400; else if (*clock >= 333) *clock = 333; else *clock = 0; } static void lower_clock(unsigned int *const clock) { --*clock; normalize_clock(clock); } static unsigned int find_common_clock_cas(sysinfo_t *const sysinfo, const spdinfo_t *const spdinfo) { /* various constraints must be fulfilled: CAS * tCK < 20ns == 160MTB tCK_max >= tCK >= tCK_min CAS >= roundup(tAA_min/tCK) CAS supported Clock(MHz) = 1000 / tCK(ns) Clock(MHz) = 8000 / tCK(MTB) AND BTW: Clock(MT) = 2000 / tCK(ns) - intel uses MTs but calls them MHz */ int i; /* Calculate common cas_latencies mask, tCKmin and tAAmin. */ unsigned int cas_latencies = (unsigned int)-1; unsigned int tCKmin = 0, tAAmin = 0; FOR_EACH_POPULATED_CHANNEL(sysinfo->dimms, i) { cas_latencies &= spdinfo->channel[i].cas_latencies; if (spdinfo->channel[i].tCKmin > tCKmin) tCKmin = spdinfo->channel[i].tCKmin; if (spdinfo->channel[i].tAAmin > tAAmin) tAAmin = spdinfo->channel[i].tAAmin; } /* Get actual value of fsb clock. */ sysinfo->selected_timings.fsb_clock = read_fsb_clock(); unsigned int fsb_mhz = 0; switch (sysinfo->selected_timings.fsb_clock) { case FSB_CLOCK_1067MHz: fsb_mhz = 1067; break; case FSB_CLOCK_800MHz: fsb_mhz = 800; break; case FSB_CLOCK_667MHz: fsb_mhz = 667; break; } unsigned int clock = 8000 / tCKmin; if ((clock > sysinfo->max_ddr3_mt / 2) || (clock > fsb_mhz / 2)) { int new_clock = MIN(sysinfo->max_ddr3_mt / 2, fsb_mhz / 2); printk(BIOS_SPEW, "DIMMs support %d MHz, but chipset only runs at up to %d. Limiting...\n", clock, new_clock); clock = new_clock; } normalize_clock(&clock); /* Find compatible clock / CAS pair. */ unsigned int tCKproposed; unsigned int CAS; while (1) { if (!clock) die("Couldn't find compatible clock / CAS settings.\n"); tCKproposed = 8000 / clock; CAS = DIV_ROUND_UP(tAAmin, tCKproposed); printk(BIOS_SPEW, "Trying CAS %u, tCK %u.\n", CAS, tCKproposed); for (; CAS <= DDR3_MAX_CAS; ++CAS) if (cas_latencies & (1 << CAS)) break; if ((CAS <= DDR3_MAX_CAS) && (CAS * tCKproposed < 160)) { /* Found good CAS. */ printk(BIOS_SPEW, "Found compatible clock / CAS pair: %u / %u.\n", clock, CAS); break; } lower_clock(&clock); } sysinfo->selected_timings.CAS = CAS; sysinfo->selected_timings.mem_clock = clock_index(clock); return tCKproposed; } static void calculate_derived_timings(sysinfo_t *const sysinfo, const unsigned int tCLK, const spdinfo_t *const spdinfo) { int i; /* Calculate common tRASmin, tRPmin, tRCDmin and tWRmin. */ unsigned int tRASmin = 0, tRPmin = 0, tRCDmin = 0, tWRmin = 0; FOR_EACH_POPULATED_CHANNEL(sysinfo->dimms, i) { if (spdinfo->channel[i].tRAS > tRASmin) tRASmin = spdinfo->channel[i].tRAS; if (spdinfo->channel[i].tRP > tRPmin) tRPmin = spdinfo->channel[i].tRP; if (spdinfo->channel[i].tRCD > tRCDmin) tRCDmin = spdinfo->channel[i].tRCD; if (spdinfo->channel[i].tWR > tWRmin) tWRmin = spdinfo->channel[i].tWR; } tRASmin = DIV_ROUND_UP(tRASmin, tCLK); tRPmin = DIV_ROUND_UP(tRPmin, tCLK); tRCDmin = DIV_ROUND_UP(tRCDmin, tCLK); tWRmin = DIV_ROUND_UP(tWRmin, tCLK); /* Lookup tRFC and calculate common tRFCmin. */ const unsigned int tRFC_from_clock_and_cap[][4] = { /* CAP_256M CAP_512M CAP_1G CAP_2G */ /* 533MHz */ { 40, 56, 68, 104 }, /* 400MHz */ { 30, 42, 51, 78 }, /* 333MHz */ { 25, 35, 43, 65 }, }; unsigned int tRFCmin = 0; FOR_EACH_POPULATED_CHANNEL(sysinfo->dimms, i) { const unsigned int tRFC = tRFC_from_clock_and_cap [sysinfo->selected_timings.mem_clock][spdinfo->channel[i].chip_capacity]; if (tRFC > tRFCmin) tRFCmin = tRFC; } /* Calculate common tRD from CAS and FSB and DRAM clocks. */ unsigned int tRDmin = sysinfo->selected_timings.CAS; switch (sysinfo->selected_timings.fsb_clock) { case FSB_CLOCK_667MHz: tRDmin += 1; break; case FSB_CLOCK_800MHz: tRDmin += 2; break; case FSB_CLOCK_1067MHz: tRDmin += 3; if (sysinfo->selected_timings.mem_clock == MEM_CLOCK_1067MT) tRDmin += 1; break; } /* Calculate common tRRDmin. */ unsigned int tRRDmin = 0; FOR_EACH_POPULATED_CHANNEL(sysinfo->dimms, i) { unsigned int tRRD = 2 + (spdinfo->channel[i].page_size / 1024); if (sysinfo->selected_timings.mem_clock == MEM_CLOCK_1067MT) tRRD += (spdinfo->channel[i].page_size / 1024); if (tRRD > tRRDmin) tRRDmin = tRRD; } /* Lookup and calculate common tFAWmin. */ unsigned int tFAW_from_pagesize_and_clock[][3] = { /* 533MHz 400MHz 333MHz */ /* 1K */ { 20, 15, 13 }, /* 2K */ { 27, 20, 17 }, }; unsigned int tFAWmin = 0; FOR_EACH_POPULATED_CHANNEL(sysinfo->dimms, i) { const unsigned int tFAW = tFAW_from_pagesize_and_clock [spdinfo->channel[i].page_size / 1024 - 1] [sysinfo->selected_timings.mem_clock]; if (tFAW > tFAWmin) tFAWmin = tFAW; } /* Refresh rate is fixed. */ unsigned int tWL; if (sysinfo->selected_timings.mem_clock == MEM_CLOCK_1067MT) { tWL = 6; } else { tWL = 5; } printk(BIOS_SPEW, "Timing values:\n" " tCLK: %3u\n" " tRAS: %3u\n" " tRP: %3u\n" " tRCD: %3u\n" " tRFC: %3u\n" " tWR: %3u\n" " tRD: %3u\n" " tRRD: %3u\n" " tFAW: %3u\n" " tWL: %3u\n", tCLK, tRASmin, tRPmin, tRCDmin, tRFCmin, tWRmin, tRDmin, tRRDmin, tFAWmin, tWL); sysinfo->selected_timings.tRAS = tRASmin; sysinfo->selected_timings.tRP = tRPmin; sysinfo->selected_timings.tRCD = tRCDmin; sysinfo->selected_timings.tRFC = tRFCmin; sysinfo->selected_timings.tWR = tWRmin; sysinfo->selected_timings.tRD = tRDmin; sysinfo->selected_timings.tRRD = tRRDmin; sysinfo->selected_timings.tFAW = tFAWmin; sysinfo->selected_timings.tWL = tWL; } static void collect_dimm_config(sysinfo_t *const sysinfo) { int i; spdinfo_t spdinfo; spdinfo.dimm_mask = 0; sysinfo->spd_type = 0; for (i = 0; i < 4; i++) if (sysinfo->spd_map[i]) { const u8 spd = smbus_read_byte(sysinfo->spd_map[i], 2); printk (BIOS_DEBUG, "%x:%x:%x\n", i, sysinfo->spd_map[i], spd); if ((spd == 7) || (spd == 8) || (spd == 0xb)) { spdinfo.dimm_mask |= 1 << i; if (sysinfo->spd_type && sysinfo->spd_type != spd) { die("Multiple types of DIMM installed in the system, don't do that!\n"); } sysinfo->spd_type = spd; } } if (spdinfo.dimm_mask == 0) { die("Could not find any DIMM.\n"); } /* Normalize spd_type to 1, 2, 3. */ sysinfo->spd_type = (sysinfo->spd_type & 1) | ((sysinfo->spd_type & 8) >> 2); printk(BIOS_SPEW, "DDR mask %x, DDR %d\n", spdinfo.dimm_mask, sysinfo->spd_type); if (sysinfo->spd_type == DDR2) { die("DDR2 not supported at this time.\n"); } else if (sysinfo->spd_type == DDR3) { verify_ddr3(sysinfo, spdinfo.dimm_mask); collect_ddr3(sysinfo, &spdinfo); } else { die("Will never support DDR1.\n"); } for (i = 0; i < 2; i++) { if ((spdinfo.dimm_mask >> (i*2)) & 1) { printk(BIOS_SPEW, "Bank %d populated:\n" " Raw card type: %4c\n" " Row addr bits: %4u\n" " Col addr bits: %4u\n" " byte width: %4u\n" " page size: %4u\n" " banks: %4u\n" " ranks: %4u\n" " tAAmin: %3u\n" " tCKmin: %3u\n" " Max clock: %3u MHz\n" " CAS: 0x%04x\n", i, spdinfo.channel[i].raw_card + 'A', spdinfo.channel[i].rows, spdinfo.channel[i].cols, spdinfo.channel[i].width, spdinfo.channel[i].page_size, spdinfo.channel[i].banks, spdinfo.channel[i].ranks, spdinfo.channel[i].tAAmin, spdinfo.channel[i].tCKmin, 8000 / spdinfo.channel[i].tCKmin, spdinfo.channel[i].cas_latencies); } } FOR_EACH_CHANNEL(i) { sysinfo->dimms[i].card_type = (spdinfo.dimm_mask & (1 << (i * 2))) ? spdinfo.channel[i].raw_card + 0xa : 0; } /* Find common memory clock and CAS. */ const unsigned int tCLK = find_common_clock_cas(sysinfo, &spdinfo); /* Calculate other timings from clock and CAS. */ calculate_derived_timings(sysinfo, tCLK, &spdinfo); /* Initialize DIMM infos. */ /* Always prefer interleaved over async channel mode. */ FOR_EACH_CHANNEL(i) { IF_CHANNEL_POPULATED(sysinfo->dimms, i) { sysinfo->dimms[i].banks = spdinfo.channel[i].banks; sysinfo->dimms[i].ranks = spdinfo.channel[i].ranks; /* .width is 1 for x8 or 2 for x16, bus width is 8 bytes. */ const unsigned int chips_per_rank = 8 / spdinfo.channel[i].width; sysinfo->dimms[i].chip_width = spdinfo.channel[i].width; sysinfo->dimms[i].chip_capacity = spdinfo.channel[i].chip_capacity; sysinfo->dimms[i].page_size = spdinfo.channel[i].page_size * chips_per_rank; sysinfo->dimms[i].rank_capacity_mb = /* offset of chip_capacity is 8 (256M), therefore, add 8 chip_capacity is in Mbit, we want MByte, therefore, subtract 3 */ (1 << (spdinfo.channel[i].chip_capacity + 8 - 3)) * chips_per_rank; } } if (CHANNEL_IS_POPULATED(sysinfo->dimms, 0) && CHANNEL_IS_POPULATED(sysinfo->dimms, 1)) sysinfo->selected_timings.channel_mode = CHANNEL_MODE_DUAL_INTERLEAVED; else sysinfo->selected_timings.channel_mode = CHANNEL_MODE_SINGLE; } static void reset_on_bad_warmboot(void) { /* Check self refresh channel status. */ const u32 reg = mchbar_read32(PMSTS_MCHBAR); /* Clear status bits. R/WC */ mchbar_write32(PMSTS_MCHBAR, reg); if ((reg & PMSTS_WARM_RESET) && !(reg & PMSTS_BOTH_SELFREFRESH)) { printk(BIOS_INFO, "DRAM was not in self refresh " "during warm boot, reset required.\n"); gm45_early_reset(); } } static void set_system_memory_frequency(const timings_t *const timings) { mchbar_clrbits16(CLKCFG_MCHBAR + 0x60, 1 << 15); mchbar_clrbits16(CLKCFG_MCHBAR + 0x48, 1 << 15); /* Calculate wanted frequency setting. */ const int want_freq = 6 - timings->mem_clock; /* Read current memory frequency. */ const u32 clkcfg = mchbar_read32(CLKCFG_MCHBAR); int cur_freq = (clkcfg & CLKCFG_MEMCLK_MASK) >> CLKCFG_MEMCLK_SHIFT; if (0 == cur_freq) { /* Try memory frequency from scratchpad. */ printk(BIOS_DEBUG, "Reading current memory frequency from scratchpad.\n"); cur_freq = (mchbar_read16(SSKPD_MCHBAR) & SSKPD_CLK_MASK) >> SSKPD_CLK_SHIFT; } if (cur_freq != want_freq) { printk(BIOS_DEBUG, "Changing memory frequency: old %x, new %x.\n", cur_freq, want_freq); /* When writing new frequency setting, reset, then set update bit. */ mchbar_clrsetbits32(CLKCFG_MCHBAR, CLKCFG_UPDATE | CLKCFG_MEMCLK_MASK, want_freq << CLKCFG_MEMCLK_SHIFT); mchbar_clrsetbits32(CLKCFG_MCHBAR, CLKCFG_MEMCLK_MASK, want_freq << CLKCFG_MEMCLK_SHIFT | CLKCFG_UPDATE); /* Reset update bit. */ mchbar_clrbits32(CLKCFG_MCHBAR, CLKCFG_UPDATE); } if ((timings->fsb_clock == FSB_CLOCK_1067MHz) && (timings->mem_clock == MEM_CLOCK_667MT)) { mchbar_write32(CLKCFG_MCHBAR + 0x16, 0x000030f0); mchbar_write32(CLKCFG_MCHBAR + 0x64, 0x000050c1); mchbar_clrsetbits32(CLKCFG_MCHBAR, 1 << 12, 1 << 17); mchbar_setbits32(CLKCFG_MCHBAR, 1 << 17 | 1 << 12); mchbar_clrbits32(CLKCFG_MCHBAR, 1 << 12); mchbar_write32(CLKCFG_MCHBAR + 0x04, 0x9bad1f1f); mchbar_write8(CLKCFG_MCHBAR + 0x08, 0xf4); mchbar_write8(CLKCFG_MCHBAR + 0x0a, 0x43); mchbar_write8(CLKCFG_MCHBAR + 0x0c, 0x10); mchbar_write8(CLKCFG_MCHBAR + 0x0d, 0x80); mchbar_write32(CLKCFG_MCHBAR + 0x50, 0x0b0e151b); mchbar_write8(CLKCFG_MCHBAR + 0x54, 0xb4); mchbar_write8(CLKCFG_MCHBAR + 0x55, 0x10); mchbar_write8(CLKCFG_MCHBAR + 0x56, 0x08); mchbar_setbits32(CLKCFG_MCHBAR, 1 << 10); mchbar_setbits32(CLKCFG_MCHBAR, 1 << 11); mchbar_clrbits32(CLKCFG_MCHBAR, 1 << 10); mchbar_clrbits32(CLKCFG_MCHBAR, 1 << 11); } mchbar_setbits32(CLKCFG_MCHBAR + 0x48, 0x3f << 24); } int raminit_read_vco_index(void) { switch (mchbar_read8(HPLLVCO_MCHBAR) & 0x7) { case VCO_2666: return 0; case VCO_3200: return 1; case VCO_4000: return 2; case VCO_5333: return 3; default: die("Unknown VCO frequency.\n"); return 0; } } static void set_igd_memory_frequencies(const sysinfo_t *const sysinfo) { const int gfx_idx = ((sysinfo->gfx_type == GMCH_GS45) && !sysinfo->gs45_low_power_mode) ? (GMCH_GS45 + 1) : sysinfo->gfx_type; /* Render and sampler frequency values seem to be some kind of factor. */ const u16 render_freq_from_vco_and_gfxtype[][10] = { /* GM45 GM47 GM49 GE45 GL40 GL43 GS40 GS45 (perf) */ /* VCO 2666 */ { 0xd, 0xd, 0xe, 0xd, 0xb, 0xd, 0xb, 0xa, 0xd }, /* VCO 3200 */ { 0xd, 0xe, 0xf, 0xd, 0xb, 0xd, 0xb, 0x9, 0xd }, /* VCO 4000 */ { 0xc, 0xd, 0xf, 0xc, 0xa, 0xc, 0xa, 0x9, 0xc }, /* VCO 5333 */ { 0xb, 0xc, 0xe, 0xb, 0x9, 0xb, 0x9, 0x8, 0xb }, }; const u16 sampler_freq_from_vco_and_gfxtype[][10] = { /* GM45 GM47 GM49 GE45 GL40 GL43 GS40 GS45 (perf) */ /* VCO 2666 */ { 0xc, 0xc, 0xd, 0xc, 0x9, 0xc, 0x9, 0x8, 0xc }, /* VCO 3200 */ { 0xc, 0xd, 0xe, 0xc, 0x9, 0xc, 0x9, 0x8, 0xc }, /* VCO 4000 */ { 0xa, 0xc, 0xd, 0xa, 0x8, 0xa, 0x8, 0x8, 0xa }, /* VCO 5333 */ { 0xa, 0xa, 0xc, 0xa, 0x7, 0xa, 0x7, 0x6, 0xa }, }; const u16 display_clock_select_from_gfxtype[] = { /* GM45 GM47 GM49 GE45 GL40 GL43 GS40 GS45 (perf) */ 1, 1, 1, 1, 1, 1, 1, 0, 1 }; if (pci_read_config16(GCFGC_PCIDEV, 0) != 0x8086) { printk(BIOS_DEBUG, "Skipping IGD memory frequency setting.\n"); return; } mchbar_write16(0x119e, 0xa800); mchbar_clrsetbits16(0x11c0, 0xff << 8, 0x01 << 8); mchbar_write16(0x119e, 0xb800); mchbar_setbits8(0x0f10, 1 << 7); /* Read VCO. */ const int vco_idx = raminit_read_vco_index(); printk(BIOS_DEBUG, "Setting IGD memory frequencies for VCO #%d.\n", vco_idx); const u32 freqcfg = ((render_freq_from_vco_and_gfxtype[vco_idx][gfx_idx] << GCFGC_CR_SHIFT) & GCFGC_CR_MASK) | ((sampler_freq_from_vco_and_gfxtype[vco_idx][gfx_idx] << GCFGC_CS_SHIFT) & GCFGC_CS_MASK); /* Set frequencies, clear update bit. */ u32 gcfgc = pci_read_config16(GCFGC_PCIDEV, GCFGC_OFFSET); gcfgc &= ~(GCFGC_CS_MASK | GCFGC_UPDATE | GCFGC_CR_MASK); gcfgc |= freqcfg; pci_write_config16(GCFGC_PCIDEV, GCFGC_OFFSET, gcfgc); /* Set frequencies, set update bit. */ gcfgc = pci_read_config16(GCFGC_PCIDEV, GCFGC_OFFSET); gcfgc &= ~(GCFGC_CS_MASK | GCFGC_CR_MASK); gcfgc |= freqcfg | GCFGC_UPDATE; pci_write_config16(GCFGC_PCIDEV, GCFGC_OFFSET, gcfgc); /* Clear update bit. */ pci_and_config16(GCFGC_PCIDEV, GCFGC_OFFSET, ~GCFGC_UPDATE); /* Set display clock select bit. */ pci_write_config16(GCFGC_PCIDEV, GCFGC_OFFSET, (pci_read_config16(GCFGC_PCIDEV, GCFGC_OFFSET) & ~GCFGC_CD_MASK) | (display_clock_select_from_gfxtype[gfx_idx] << GCFGC_CD_SHIFT)); } static void configure_dram_control_mode(const timings_t *const timings, const dimminfo_t *const dimms) { int ch, r; FOR_EACH_CHANNEL(ch) { unsigned int mchbar = CxDRC0_MCHBAR(ch); u32 cxdrc = mchbar_read32(mchbar); cxdrc &= ~CxDRC0_RANKEN_MASK; FOR_EACH_POPULATED_RANK_IN_CHANNEL(dimms, ch, r) cxdrc |= CxDRC0_RANKEN(r); cxdrc = (cxdrc & ~CxDRC0_RMS_MASK) | /* Always 7.8us for DDR3: */ CxDRC0_RMS_78US; mchbar_write32(mchbar, cxdrc); mchbar = CxDRC1_MCHBAR(ch); cxdrc = mchbar_read32(mchbar); cxdrc |= CxDRC1_NOTPOP_MASK; FOR_EACH_POPULATED_RANK_IN_CHANNEL(dimms, ch, r) cxdrc &= ~CxDRC1_NOTPOP(r); cxdrc |= CxDRC1_MUSTWR; mchbar_write32(mchbar, cxdrc); mchbar = CxDRC2_MCHBAR(ch); cxdrc = mchbar_read32(mchbar); cxdrc |= CxDRC2_NOTPOP_MASK; FOR_EACH_POPULATED_RANK_IN_CHANNEL(dimms, ch, r) cxdrc &= ~CxDRC2_NOTPOP(r); cxdrc |= CxDRC2_MUSTWR; if (timings->mem_clock == MEM_CLOCK_1067MT) cxdrc |= CxDRC2_CLK1067MT; mchbar_write32(mchbar, cxdrc); } } static void rcomp_initialization(const stepping_t stepping, const int sff) { /* Program RCOMP codes. */ if (sff) die("SFF platform unsupported in RCOMP initialization.\n"); /* Values are for DDR3. */ mchbar_clrbits8(0x6ac, 0x0f); mchbar_write8(0x6b0, 0x55); mchbar_clrbits8(0x6ec, 0x0f); mchbar_write8(0x6f0, 0x66); mchbar_clrbits8(0x72c, 0x0f); mchbar_write8(0x730, 0x66); mchbar_clrbits8(0x76c, 0x0f); mchbar_write8(0x770, 0x66); mchbar_clrbits8(0x7ac, 0x0f); mchbar_write8(0x7b0, 0x66); mchbar_clrbits8(0x7ec, 0x0f); mchbar_write8(0x7f0, 0x66); mchbar_clrbits8(0x86c, 0x0f); mchbar_write8(0x870, 0x55); mchbar_clrbits8(0x8ac, 0x0f); mchbar_write8(0x8b0, 0x66); /* ODT multiplier bits. */ mchbar_clrsetbits32(0x04d0, 7 << 3 | 7 << 0, 2 << 3 | 2 << 0); /* Perform RCOMP calibration for DDR3. */ raminit_rcomp_calibration(stepping); /* Run initial RCOMP. */ mchbar_setbits32(0x418, 1 << 17); mchbar_clrbits32(0x40c, 1 << 23); mchbar_clrbits32(0x41c, 1 << 7 | 1 << 3); mchbar_setbits32(0x400, 1); while (mchbar_read32(0x400) & 1) {} /* Run second RCOMP. */ mchbar_setbits32(0x40c, 1 << 19); mchbar_setbits32(0x400, 1); while (mchbar_read32(0x400) & 1) {} /* Cleanup and start periodic RCOMP. */ mchbar_clrbits32(0x40c, 1 << 19); mchbar_setbits32(0x40c, 1 << 23); mchbar_clrbits32(0x418, 1 << 17); mchbar_setbits32(0x41c, 1 << 7 | 1 << 3); mchbar_setbits32(0x400, 1 << 1); } static void dram_powerup(const int resume) { udelay(200); mchbar_clrsetbits32(CLKCFG_MCHBAR, 1 << 3, 3 << 21); if (!resume) { mchbar_setbits32(0x1434, 1 << 10); udelay(1); } mchbar_setbits32(0x1434, 1 << 6); if (!resume) { udelay(1); mchbar_setbits32(0x1434, 1 << 9); mchbar_clrbits32(0x1434, 1 << 10); udelay(500); } } static void dram_program_timings(const timings_t *const timings) { /* Values are for DDR3. */ const int burst_length = 8; const int tWTR = 4, tRTP = 1; int i; FOR_EACH_CHANNEL(i) { u32 reg = mchbar_read32(CxDRT0_MCHBAR(i)); const int btb_wtp = timings->tWL + burst_length/2 + timings->tWR; const int btb_wtr = timings->tWL + burst_length/2 + tWTR; reg = (reg & ~(CxDRT0_BtB_WtP_MASK | CxDRT0_BtB_WtR_MASK)) | ((btb_wtp << CxDRT0_BtB_WtP_SHIFT) & CxDRT0_BtB_WtP_MASK) | ((btb_wtr << CxDRT0_BtB_WtR_SHIFT) & CxDRT0_BtB_WtR_MASK); if (timings->mem_clock != MEM_CLOCK_1067MT) { reg = (reg & ~(0x7 << 15)) | ((9 - timings->CAS) << 15); reg = (reg & ~(0xf << 10)) | ((timings->CAS - 3) << 10); } else { reg = (reg & ~(0x7 << 15)) | ((10 - timings->CAS) << 15); reg = (reg & ~(0xf << 10)) | ((timings->CAS - 4) << 10); } reg = (reg & ~(0x7 << 5)) | (3 << 5); reg = (reg & ~(0x7 << 0)) | (1 << 0); mchbar_write32(CxDRT0_MCHBAR(i), reg); reg = mchbar_read32(CxDRT1_MCHBAR(i)); reg = (reg & ~(0x03 << 28)) | ((tRTP & 0x03) << 28); reg = (reg & ~(0x1f << 21)) | ((timings->tRAS & 0x1f) << 21); reg = (reg & ~(0x07 << 10)) | (((timings->tRRD - 2) & 0x07) << 10); reg = (reg & ~(0x07 << 5)) | (((timings->tRCD - 2) & 0x07) << 5); reg = (reg & ~(0x07 << 0)) | (((timings->tRP - 2) & 0x07) << 0); mchbar_write32(CxDRT1_MCHBAR(i), reg); reg = mchbar_read32(CxDRT2_MCHBAR(i)); reg = (reg & ~(0x1f << 17)) | ((timings->tFAW & 0x1f) << 17); if (timings->mem_clock != MEM_CLOCK_1067MT) { reg = (reg & ~(0x7 << 12)) | (0x2 << 12); reg = (reg & ~(0xf << 6)) | (0x9 << 6); } else { reg = (reg & ~(0x7 << 12)) | (0x3 << 12); reg = (reg & ~(0xf << 6)) | (0xc << 6); } reg = (reg & ~(0x1f << 0)) | (0x13 << 0); mchbar_write32(CxDRT2_MCHBAR(i), reg); reg = mchbar_read32(CxDRT3_MCHBAR(i)); reg |= 0x3 << 28; reg = (reg & ~(0x03 << 26)); reg = (reg & ~(0x07 << 23)) | (((timings->CAS - 3) & 0x07) << 23); reg = (reg & ~(0xff << 13)) | ((timings->tRFC & 0xff) << 13); reg = (reg & ~(0x07 << 0)) | (((timings->tWL - 2) & 0x07) << 0); mchbar_write32(CxDRT3_MCHBAR(i), reg); reg = mchbar_read32(CxDRT4_MCHBAR(i)); static const u8 timings_by_clock[4][3] = { /* 333MHz 400MHz 533MHz 667MT 800MT 1067MT */ { 0x07, 0x0a, 0x0d }, { 0x3a, 0x46, 0x5d }, { 0x0c, 0x0e, 0x18 }, { 0x21, 0x28, 0x35 }, }; const int clk_idx = 2 - timings->mem_clock; reg = (reg & ~(0x01f << 27)) | (timings_by_clock[0][clk_idx] << 27); reg = (reg & ~(0x3ff << 17)) | (timings_by_clock[1][clk_idx] << 17); reg = (reg & ~(0x03f << 10)) | (timings_by_clock[2][clk_idx] << 10); reg = (reg & ~(0x1ff << 0)) | (timings_by_clock[3][clk_idx] << 0); mchbar_write32(CxDRT4_MCHBAR(i), reg); reg = mchbar_read32(CxDRT5_MCHBAR(i)); if (timings->mem_clock == MEM_CLOCK_1067MT) reg = (reg & ~(0xf << 28)) | (0x8 << 28); reg = (reg & ~(0x00f << 22)) | ((burst_length/2 + timings->CAS + 2) << 22); reg = (reg & ~(0x3ff << 12)) | (0x190 << 12); reg = (reg & ~(0x00f << 4)) | ((timings->CAS - 2) << 4); reg = (reg & ~(0x003 << 2)) | (0x001 << 2); reg = (reg & ~(0x003 << 0)); mchbar_write32(CxDRT5_MCHBAR(i), reg); reg = mchbar_read32(CxDRT6_MCHBAR(i)); reg = (reg & ~(0xffff << 16)) | (0x066a << 16); /* always 7.8us refresh rate for DDR3 */ reg |= (1 << 2); mchbar_write32(CxDRT6_MCHBAR(i), reg); } } static void dram_program_banks(const dimminfo_t *const dimms) { int ch, r; FOR_EACH_CHANNEL(ch) { const int tRPALL = dimms[ch].banks == 8; u32 reg = mchbar_read32(CxDRT1_MCHBAR(ch)) & ~(0x01 << 15); IF_CHANNEL_POPULATED(dimms, ch) reg |= tRPALL << 15; mchbar_write32(CxDRT1_MCHBAR(ch), reg); reg = mchbar_read32(CxDRA_MCHBAR(ch)) & ~CxDRA_BANKS_MASK; FOR_EACH_POPULATED_RANK_IN_CHANNEL(dimms, ch, r) { reg |= CxDRA_BANKS(r, dimms[ch].banks); } mchbar_write32(CxDRA_MCHBAR(ch), reg); } } static void odt_setup(const timings_t *const timings, const int sff) { /* Values are for DDR3. */ int ch; FOR_EACH_CHANNEL(ch) { u32 reg = mchbar_read32(CxODT_HIGH(ch)); if (sff && (timings->mem_clock != MEM_CLOCK_1067MT)) reg &= ~(0x3 << (61 - 32)); else reg |= 0x3 << (61 - 32); reg = (reg & ~(0x3 << (52 - 32))) | (0x2 << (52 - 32)); reg = (reg & ~(0x7 << (48 - 32))) | ((timings->CAS - 3) << (48 - 32)); reg = (reg & ~(0xf << (44 - 32))) | (0x7 << (44 - 32)); if (timings->mem_clock != MEM_CLOCK_1067MT) { reg = (reg & ~(0xf << (40 - 32))) | ((12 - timings->CAS) << (40 - 32)); reg = (reg & ~(0xf << (36 - 32))) | (( 2 + timings->CAS) << (36 - 32)); } else { reg = (reg & ~(0xf << (40 - 32))) | ((13 - timings->CAS) << (40 - 32)); reg = (reg & ~(0xf << (36 - 32))) | (( 1 + timings->CAS) << (36 - 32)); } reg = (reg & ~(0xf << (32 - 32))) | (0x7 << (32 - 32)); mchbar_write32(CxODT_HIGH(ch), reg); reg = mchbar_read32(CxODT_LOW(ch)); reg = (reg & ~(0x7 << 28)) | (0x2 << 28); reg = (reg & ~(0x3 << 22)) | (0x2 << 22); reg = (reg & ~(0x7 << 12)) | (0x2 << 12); reg = (reg & ~(0x7 << 4)) | (0x2 << 4); switch (timings->mem_clock) { case MEM_CLOCK_667MT: reg = (reg & ~0x7); break; case MEM_CLOCK_800MT: reg = (reg & ~0x7) | 0x2; break; case MEM_CLOCK_1067MT: reg = (reg & ~0x7) | 0x5; break; } mchbar_write32(CxODT_LOW(ch), reg); } } static void misc_settings(const timings_t *const timings, const stepping_t stepping) { mchbar_clrsetbits32(0x1260, 1 << 24 | 0x1f, timings->tRD); mchbar_clrsetbits32(0x1360, 1 << 24 | 0x1f, timings->tRD); mchbar_clrsetbits8(0x1268, 0xf, timings->tWL); mchbar_clrsetbits8(0x1368, 0xf, timings->tWL); mchbar_clrsetbits8(0x12a0, 0xf, 0xa); mchbar_clrsetbits8(0x13a0, 0xf, 0xa); mchbar_clrsetbits32(0x218, 7 << 29 | 7 << 25 | 3 << 22 | 3 << 10, 4 << 29 | 3 << 25 | 0 << 22 | 1 << 10); mchbar_clrsetbits32(0x220, 7 << 16, 1 << 21 | 1 << 16); mchbar_clrsetbits32(0x224, 7 << 8, 3 << 8); if (stepping >= STEPPING_B1) mchbar_setbits8(0x234, 1 << 3); } static void clock_crossing_setup(const fsb_clock_t fsb, const mem_clock_t ddr3clock, const dimminfo_t *const dimms) { int ch; static const u32 values_from_fsb_and_mem[][3][4] = { /* FSB 1067MHz */{ /* DDR3-1067 */ { 0x00000000, 0x00000000, 0x00180006, 0x00810060 }, /* DDR3-800 */ { 0x00000000, 0x00000000, 0x0000001c, 0x000300e0 }, /* DDR3-667 */ { 0x00000000, 0x00001c00, 0x03c00038, 0x0007e000 }, }, /* FSB 800MHz */{ /* DDR3-1067 */ { 0, 0, 0, 0 }, /* DDR3-800 */ { 0x00000000, 0x00000000, 0x0030000c, 0x000300c0 }, /* DDR3-667 */ { 0x00000000, 0x00000380, 0x0060001c, 0x00030c00 }, }, /* FSB 667MHz */{ /* DDR3-1067 */ { 0, 0, 0, 0 }, /* DDR3-800 */ { 0, 0, 0, 0 }, /* DDR3-667 */ { 0x00000000, 0x00000000, 0x0030000c, 0x000300c0 }, }, }; const u32 *data = values_from_fsb_and_mem[fsb][ddr3clock]; mchbar_write32(0x0208, data[3]); mchbar_write32(0x020c, data[2]); if (((fsb == FSB_CLOCK_1067MHz) || (fsb == FSB_CLOCK_800MHz)) && (ddr3clock == MEM_CLOCK_667MT)) mchbar_write32(0x0210, data[1]); static const u32 from_fsb_and_mem[][3] = { /* DDR3-1067 DDR3-800 DDR3-667 */ /* FSB 1067MHz */{ 0x40100401, 0x10040220, 0x08040110, }, /* FSB 800MHz */{ 0x00000000, 0x40100401, 0x00080201, }, /* FSB 667MHz */{ 0x00000000, 0x00000000, 0x40100401, }, }; FOR_EACH_CHANNEL(ch) { const unsigned int mchbar = 0x1258 + (ch * 0x0100); if ((fsb == FSB_CLOCK_1067MHz) && (ddr3clock == MEM_CLOCK_800MT) && CHANNEL_IS_CARDF(dimms, ch)) mchbar_write32(mchbar, 0x08040120); else mchbar_write32(mchbar, from_fsb_and_mem[fsb][ddr3clock]); mchbar_write32(mchbar + 4, 0); } } /* Program egress VC1 isoch timings. */ static void vc1_program_timings(const fsb_clock_t fsb) { const u32 timings_by_fsb[][2] = { /* FSB 1067MHz */ { 0x1a, 0x01380138 }, /* FSB 800MHz */ { 0x14, 0x00f000f0 }, /* FSB 667MHz */ { 0x10, 0x00c000c0 }, }; epbar_write8(EPVC1ITC, timings_by_fsb[fsb][0]); epbar_write32(EPVC1IST + 0, timings_by_fsb[fsb][1]); epbar_write32(EPVC1IST + 4, timings_by_fsb[fsb][1]); } #define DEFAULT_PCI_MMIO_SIZE 2048 #define HOST_BRIDGE PCI_DEVFN(0, 0) static unsigned int get_mmio_size(void) { const struct device *dev; const struct northbridge_intel_gm45_config *cfg = NULL; dev = pcidev_path_on_root(HOST_BRIDGE); if (dev) cfg = dev->chip_info; /* If this is zero, it just means devicetree.cb didn't set it */ if (!cfg || cfg->pci_mmio_size == 0) return DEFAULT_PCI_MMIO_SIZE; else return cfg->pci_mmio_size; } /* @prejedec if not zero, set rank size to 128MB and page size to 4KB. */ static void program_memory_map(const dimminfo_t *const dimms, const channel_mode_t mode, const int prejedec, u16 ggc) { int ch, r; /* Program rank boundaries (CxDRBy). */ unsigned int base = 0; /* start of next rank in MB */ unsigned int total_mb[2] = { 0, 0 }; /* total memory per channel in MB */ FOR_EACH_CHANNEL(ch) { if (mode == CHANNEL_MODE_DUAL_INTERLEAVED) /* In interleaved mode, start every channel from 0. */ base = 0; for (r = 0; r < RANKS_PER_CHANNEL; r += 2) { /* Fixed capacity for pre-jedec config. */ const unsigned int rank_capacity_mb = prejedec ? 128 : dimms[ch].rank_capacity_mb; u32 reg = 0; /* Program bounds in CxDRBy. */ IF_RANK_POPULATED(dimms, ch, r) { base += rank_capacity_mb; total_mb[ch] += rank_capacity_mb; } reg |= CxDRBy_BOUND_MB(r, base); IF_RANK_POPULATED(dimms, ch, r+1) { base += rank_capacity_mb; total_mb[ch] += rank_capacity_mb; } reg |= CxDRBy_BOUND_MB(r+1, base); mchbar_write32(CxDRBy_MCHBAR(ch, r), reg); } } /* Program page size (CxDRA). */ FOR_EACH_CHANNEL(ch) { u32 reg = mchbar_read32(CxDRA_MCHBAR(ch)) & ~CxDRA_PAGESIZE_MASK; FOR_EACH_POPULATED_RANK_IN_CHANNEL(dimms, ch, r) { /* Fixed page size for pre-jedec config. */ const unsigned int page_size = /* dimm page size in bytes */ prejedec ? 4096 : dimms[ch].page_size; reg |= CxDRA_PAGESIZE(r, log2(page_size)); /* deferred to f5_27: reg |= CxDRA_BANKS(r, dimms[ch].banks); */ } mchbar_write32(CxDRA_MCHBAR(ch), reg); } /* Calculate memory mapping, all values in MB. */ u32 uma_sizem = 0; if (!prejedec) { if (!(ggc & 2)) { printk(BIOS_DEBUG, "IGD decoded, subtracting "); /* Graphics memory */ const u32 gms_sizek = decode_igd_memory_size((ggc >> 4) & 0xf); printk(BIOS_DEBUG, "%uM UMA", gms_sizek >> 10); /* GTT Graphics Stolen Memory Size (GGMS) */ const u32 gsm_sizek = decode_igd_gtt_size((ggc >> 8) & 0xf); printk(BIOS_DEBUG, " and %uM GTT\n", gsm_sizek >> 10); uma_sizem = (gms_sizek + gsm_sizek) >> 10; } /* TSEG 2M, This amount can easily be covered by SMRR MTRR's, which requires to have TSEG_BASE aligned to TSEG_SIZE. */ pci_update_config8(PCI_DEV(0, 0, 0), D0F0_ESMRAMC, ~0x07, (1 << 1) | (1 << 0)); uma_sizem += 2; } const unsigned int mmio_size = get_mmio_size(); const unsigned int MMIOstart = 4096 - mmio_size + uma_sizem; const int me_active = pci_read_config8(PCI_DEV(0, 3, 0), PCI_CLASS_REVISION) != 0xff; const unsigned int ME_SIZE = prejedec || !me_active ? 0 : 32; const unsigned int usedMEsize = (total_mb[0] != total_mb[1]) ? ME_SIZE : 2 * ME_SIZE; const unsigned int claimCapable = !(pci_read_config32(PCI_DEV(0, 0, 0), D0F0_CAPID0 + 4) & (1 << (47 - 32))); const unsigned int TOM = total_mb[0] + total_mb[1]; unsigned int TOMminusME = TOM - usedMEsize; unsigned int TOLUD = (TOMminusME < MMIOstart) ? TOMminusME : MMIOstart; unsigned int TOUUD = TOMminusME; unsigned int REMAPbase = 0xffff, REMAPlimit = 0; if (claimCapable && (TOMminusME >= (MMIOstart + 64))) { /* 64MB alignment: We'll lose some MBs here, if ME is on. */ TOMminusME &= ~(64 - 1); /* 64MB alignment: Loss will be reclaimed. */ TOLUD &= ~(64 - 1); if (TOMminusME > 4096) { REMAPbase = TOMminusME; REMAPlimit = REMAPbase + (4096 - TOLUD); } else { REMAPbase = 4096; REMAPlimit = REMAPbase + (TOMminusME - TOLUD); } TOUUD = REMAPlimit; /* REMAPlimit is an inclusive bound, all others exclusive. */ REMAPlimit -= 64; } pci_write_config16(PCI_DEV(0, 0, 0), D0F0_TOM, (TOM >> 7) & 0x1ff); pci_write_config16(PCI_DEV(0, 0, 0), D0F0_TOLUD, TOLUD << 4); pci_write_config16(PCI_DEV(0, 0, 0), D0F0_TOUUD, TOUUD); pci_write_config16(PCI_DEV(0, 0, 0), D0F0_REMAPBASE, (REMAPbase >> 6) & 0x03ff); pci_write_config16(PCI_DEV(0, 0, 0), D0F0_REMAPLIMIT, (REMAPlimit >> 6) & 0x03ff); /* Program channel mode. */ switch (mode) { case CHANNEL_MODE_SINGLE: printk(BIOS_DEBUG, "Memory configured in single-channel mode.\n"); mchbar_clrbits32(DCC_MCHBAR, DCC_INTERLEAVED); break; case CHANNEL_MODE_DUAL_ASYNC: printk(BIOS_DEBUG, "Memory configured in dual-channel asymmetric mode.\n"); mchbar_clrbits32(DCC_MCHBAR, DCC_INTERLEAVED); break; case CHANNEL_MODE_DUAL_INTERLEAVED: printk(BIOS_DEBUG, "Memory configured in dual-channel interleaved mode.\n"); mchbar_clrbits32(DCC_MCHBAR, DCC_NO_CHANXOR | 1 << 9); mchbar_setbits32(DCC_MCHBAR, DCC_INTERLEAVED); break; } printk(BIOS_SPEW, "Memory map:\n" "TOM = %5uMB\n" "TOLUD = %5uMB\n" "TOUUD = %5uMB\n" "REMAP:\t base = %5uMB\n" "\t limit = %5uMB\n" "usedMEsize: %dMB\n", TOM, TOLUD, TOUUD, REMAPbase, REMAPlimit, usedMEsize); } static void prejedec_memory_map(const dimminfo_t *const dimms, channel_mode_t mode) { /* Never use dual-interleaved mode in pre-jedec config. */ if (CHANNEL_MODE_DUAL_INTERLEAVED == mode) mode = CHANNEL_MODE_DUAL_ASYNC; program_memory_map(dimms, mode, 1, 0); mchbar_setbits32(DCC_MCHBAR, DCC_NO_CHANXOR); } static void ddr3_select_clock_mux(const mem_clock_t ddr3clock, const dimminfo_t *const dimms, const stepping_t stepping) { const int clk1067 = (ddr3clock == MEM_CLOCK_1067MT); const int cardF[] = { CHANNEL_IS_CARDF(dimms, 0), CHANNEL_IS_CARDF(dimms, 1) }; int ch; if (stepping < STEPPING_B1) die("Stepping = STEPPING_CONVERSION_A1; const int cardF[] = { CHANNEL_IS_CARDF(dimms, 0), CHANNEL_IS_CARDF(dimms, 1) }; int ch; if (stepping < STEPPING_B1) die("Stepping = base; addr -= 4) { tmp = mchbar_read32(addr); tmp &= ~((3 << 25) | (1 << 8) | (7 << 16) | (0xf << 20) | (1 << 27)); tmp |= (1 << 27); switch (ddr3clock) { case MEM_CLOCK_667MT: tmp |= (1 << 16) | (4 << 20); break; case MEM_CLOCK_800MT: tmp |= (2 << 16) | (3 << 20); break; case MEM_CLOCK_1067MT: if (!sff) tmp |= (2 << 16) | (1 << 20); else tmp |= (2 << 16) | (2 << 20); break; default: die("Wrong clock"); } mchbar_write32(addr, tmp); } } } static void memory_io_init(const mem_clock_t ddr3clock, const dimminfo_t *const dimms, const stepping_t stepping, const int sff) { u32 tmp; if (stepping < STEPPING_B1) die("Stepping tWR < 5) || (timings->tWR > 12)) die("tWR value unsupported in Jedec initialization.\n"); /* Pre-jedec settings */ mchbar_setbits32(0x40, 1 << 1); mchbar_setbits32(0x230, 3 << 1); mchbar_setbits32(0x238, 3 << 24); mchbar_setbits32(0x23c, 3 << 24); /* Normal write pointer operation */ mchbar_setbits32(0x14f0, 1 << 9); mchbar_setbits32(0x15f0, 1 << 9); mchbar_clrsetbits32(DCC_MCHBAR, DCC_CMD_MASK, DCC_CMD_NOP); pci_and_config8(PCI_DEV(0, 0, 0), 0xf0, ~(1 << 2)); pci_or_config8(PCI_DEV(0, 0, 0), 0xf0, 1 << 2); udelay(2); /* 5 6 7 8 9 10 11 12 */ static const u8 wr_lut[] = { 1, 2, 3, 4, 5, 5, 6, 6 }; const int WL = ((timings->tWL - 5) & 7) << 6; const int ODT_120OHMS = (1 << 9); const int ODS_34OHMS = (1 << 4); const int WR = (wr_lut[timings->tWR - 5] & 7) << 12; const int DLL1 = 1 << 11; const int CAS = ((timings->CAS - 4) & 7) << 7; const int INTERLEAVED = 1 << 6;/* This is READ Burst Type == interleaved. */ int ch, r; FOR_EACH_POPULATED_RANK(dimms, ch, r) { /* We won't do this in dual-interleaved mode, so don't care about the offset. Mirrored ranks aren't taken into account here. */ const u32 rankaddr = raminit_get_rank_addr(ch, r); printk(BIOS_DEBUG, "JEDEC init @0x%08x\n", rankaddr); mchbar_clrsetbits32(DCC_MCHBAR, DCC_SET_EREG_MASK, DCC_SET_EREGx(2)); read32p(rankaddr | WL); mchbar_clrsetbits32(DCC_MCHBAR, DCC_SET_EREG_MASK, DCC_SET_EREGx(3)); read32p(rankaddr); mchbar_clrsetbits32(DCC_MCHBAR, DCC_SET_EREG_MASK, DCC_SET_EREGx(1)); read32p(rankaddr | ODT_120OHMS | ODS_34OHMS); mchbar_clrsetbits32(DCC_MCHBAR, DCC_CMD_MASK, DCC_SET_MREG); read32p(rankaddr | WR | DLL1 | CAS | INTERLEAVED); mchbar_clrsetbits32(DCC_MCHBAR, DCC_CMD_MASK, DCC_SET_MREG); read32p(rankaddr | WR | CAS | INTERLEAVED); } } static void ddr3_calibrate_zq(void) { udelay(2); u32 tmp = mchbar_read32(DCC_MCHBAR); tmp &= ~(7 << 16); tmp |= (5 << 16); /* ZQ calibration mode */ mchbar_write32(DCC_MCHBAR, tmp); mchbar_setbits32(CxDRT6_MCHBAR(0), 1 << 3); mchbar_setbits32(CxDRT6_MCHBAR(1), 1 << 3); udelay(1); mchbar_clrbits32(CxDRT6_MCHBAR(0), 1 << 3); mchbar_clrbits32(CxDRT6_MCHBAR(1), 1 << 3); mchbar_setbits32(DCC_MCHBAR, 7 << 16); /* Normal operation */ } static void post_jedec_sequence(const int cores) { const int quadcore = cores == 4; mchbar_clrbits32(0x0040, 1 << 1); mchbar_clrbits32(0x0230, 3 << 1); mchbar_setbits32(0x0230, 1 << 15); mchbar_clrbits32(0x0230, 1 << 19); mchbar_write32(0x1250, 0x6c4); mchbar_write32(0x1350, 0x6c4); mchbar_write32(0x1254, 0x871a066d); mchbar_write32(0x1354, 0x871a066d); mchbar_setbits32(0x0238, 1 << 26); mchbar_clrbits32(0x0238, 3 << 24); mchbar_setbits32(0x0238, 1 << 23); mchbar_clrsetbits32(0x0238, 7 << 20, 3 << 20); mchbar_clrsetbits32(0x0238, 7 << 17, 6 << 17); mchbar_clrsetbits32(0x0238, 7 << 14, 6 << 14); mchbar_clrsetbits32(0x0238, 7 << 11, 6 << 11); mchbar_clrsetbits32(0x0238, 7 << 8, 6 << 8); mchbar_clrbits32(0x023c, 3 << 24); mchbar_clrbits32(0x023c, 1 << 23); mchbar_clrsetbits32(0x023c, 7 << 20, 3 << 20); mchbar_clrsetbits32(0x023c, 7 << 17, 6 << 17); mchbar_clrsetbits32(0x023c, 7 << 14, 6 << 14); mchbar_clrsetbits32(0x023c, 7 << 11, 6 << 11); mchbar_clrsetbits32(0x023c, 7 << 8, 6 << 8); if (quadcore) { mchbar_setbits32(0xb14, 0xbfbf << 16); } } static void dram_optimizations(const timings_t *const timings, const dimminfo_t *const dimms) { int ch; FOR_EACH_POPULATED_CHANNEL(dimms, ch) { const unsigned int mchbar = CxDRC1_MCHBAR(ch); u32 cxdrc1 = mchbar_read32(mchbar); cxdrc1 &= ~CxDRC1_SSDS_MASK; if (dimms[ch].ranks == 1) cxdrc1 |= CxDRC1_SS; else cxdrc1 |= CxDRC1_DS; mchbar_write32(mchbar, cxdrc1); } } u32 raminit_get_rank_addr(unsigned int channel, unsigned int rank) { if (!channel && !rank) return 0; /* Address of first rank */ /* Read the bound of the previous rank. */ if (rank > 0) { rank--; } else { rank = 3; /* Highest rank per channel */ channel--; } const u32 reg = mchbar_read32(CxDRBy_MCHBAR(channel, rank)); /* Bound is in 32MB. */ return ((reg & CxDRBy_BOUND_MASK(rank)) >> CxDRBy_BOUND_SHIFT(rank)) << 25; } void raminit_reset_readwrite_pointers(void) { mchbar_setbits32(0x1234, 1 << 6); mchbar_clrbits32(0x1234, 1 << 6); mchbar_setbits32(0x1334, 1 << 6); mchbar_clrbits32(0x1334, 1 << 6); mchbar_clrbits32(0x14f0, 1 << 9); mchbar_setbits32(0x14f0, 1 << 9); mchbar_setbits32(0x14f0, 1 << 10); mchbar_clrbits32(0x15f0, 1 << 9); mchbar_setbits32(0x15f0, 1 << 9); mchbar_setbits32(0x15f0, 1 << 10); } void raminit(sysinfo_t *const sysinfo, const int s3resume) { const dimminfo_t *const dimms = sysinfo->dimms; const timings_t *const timings = &sysinfo->selected_timings; int ch; timestamp_add_now(TS_INITRAM_START); /* Wait for some bit, maybe TXT clear. */ if (sysinfo->txt_enabled) { while (!(read8((u8 *)0xfed40000) & (1 << 7))) {} } /* Collect information about DIMMs and find common settings. */ collect_dimm_config(sysinfo); /* Check for bad warm boot. */ reset_on_bad_warmboot(); /***** From now on, program according to collected infos: *****/ /* Program DRAM type. */ switch (sysinfo->spd_type) { case DDR2: mchbar_setbits8(0x1434, 1 << 7); break; case DDR3: mchbar_setbits8(0x1434, 3 << 0); break; } /* Program system memory frequency. */ set_system_memory_frequency(timings); /* Program IGD memory frequency. */ set_igd_memory_frequencies(sysinfo); /* Configure DRAM control mode for populated channels. */ configure_dram_control_mode(timings, dimms); /* Initialize RCOMP. */ rcomp_initialization(sysinfo->stepping, sysinfo->sff); /* Power-up DRAM. */ dram_powerup(s3resume); /* Program DRAM timings. */ dram_program_timings(timings); /* Program number of banks. */ dram_program_banks(dimms); /* Enable DRAM clock pairs for populated DIMMs. */ FOR_EACH_POPULATED_CHANNEL(dimms, ch) mchbar_setbits32(CxDCLKDIS_MCHBAR(ch), CxDCLKDIS_ENABLE); /* Enable On-Die Termination. */ odt_setup(timings, sysinfo->sff); /* Miscellaneous settings. */ misc_settings(timings, sysinfo->stepping); /* Program clock crossing registers. */ clock_crossing_setup(timings->fsb_clock, timings->mem_clock, dimms); /* Program egress VC1 timings. */ vc1_program_timings(timings->fsb_clock); /* Perform system-memory i/o initialization. */ memory_io_init(timings->mem_clock, dimms, sysinfo->stepping, sysinfo->sff); /* Initialize memory map with dummy values of 128MB per rank with a page size of 4KB. This makes the JEDEC initialization code easier. */ prejedec_memory_map(dimms, timings->channel_mode); if (!s3resume) /* Perform JEDEC initialization of DIMMS. */ jedec_init(timings, dimms); /* Some programming steps after JEDEC initialization. */ post_jedec_sequence(sysinfo->cores); /* Announce normal operation, initialization completed. */ mchbar_setbits32(DCC_MCHBAR, 0x7 << 16 | 0x1 << 19); pci_or_config8(PCI_DEV(0, 0, 0), 0xf0, 1 << 2); pci_and_config8(PCI_DEV(0, 0, 0), 0xf0, ~(1 << 2)); /* Take a breath (the reader). */ /* Perform ZQ calibration for DDR3. */ if (sysinfo->spd_type == DDR3) ddr3_calibrate_zq(); /* Perform receive-enable calibration. */ raminit_receive_enable_calibration(timings, dimms); /* Lend clock values from receive-enable calibration. */ mchbar_clrsetbits32(CxDRT5_MCHBAR(0), 0xf0, (((mchbar_read32(CxDRT3_MCHBAR(0)) >> 7) - 1) & 0xf) << 4); mchbar_clrsetbits32(CxDRT5_MCHBAR(1), 0xf0, (((mchbar_read32(CxDRT3_MCHBAR(1)) >> 7) - 1) & 0xf) << 4); /* Perform read/write training for high clock rate. */ if (timings->mem_clock == MEM_CLOCK_1067MT) { raminit_read_training(dimms, s3resume); raminit_write_training(timings->mem_clock, dimms, s3resume); } igd_compute_ggc(sysinfo); /* Program final memory map (with real values). */ program_memory_map(dimms, timings->channel_mode, 0, sysinfo->ggc); /* Some last optimizations. */ dram_optimizations(timings, dimms); /* Mark raminit being finished. :-) */ pci_and_config8(PCI_DEV(0, 0x1f, 0), 0xa2, (u8)~(1 << 7)); raminit_thermal(sysinfo); init_igd(sysinfo); timestamp_add_now(TS_INITRAM_END); }