| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2015 Damien Zammit <damien@zamaudio.com> |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of |
| * the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <arch/io.h> |
| #include <cbmem.h> |
| #include <console/console.h> |
| #include <cpu/x86/cache.h> |
| #include <cpu/x86/mtrr.h> |
| #include <delay.h> |
| #include <halt.h> |
| #include <lib.h> |
| #include "iomap.h" |
| #include <southbridge/intel/i82801gx/i82801gx.h> /* smbus_read_byte */ |
| #include "x4x.h" |
| #include <pc80/mc146818rtc.h> |
| #include <spd.h> |
| #include <string.h> |
| |
| static inline int spd_read_byte(unsigned int device, unsigned int address) |
| { |
| return smbus_read_byte(device, address); |
| } |
| |
| static void sdram_read_spds(struct sysinfo *s) |
| { |
| u8 i, j, chan; |
| int status = 0; |
| FOR_EACH_DIMM(i) { |
| if (s->spd_map[i] == 0) { |
| /* Non-existent SPD address */ |
| s->dimms[i].card_type = RAW_CARD_UNPOPULATED; |
| continue; |
| } |
| for (j = 0; j < 64; j++) { |
| status = spd_read_byte(s->spd_map[i], j); |
| if (status < 0) { |
| /* No SPD here */ |
| s->dimms[i].card_type = RAW_CARD_UNPOPULATED; |
| break; |
| } |
| s->dimms[i].spd_data[j] = (u8) status; |
| if (j == 62) |
| s->dimms[i].card_type = ((u8) status) & 0x1f; |
| } |
| if (status >= 0) { |
| hexdump(s->dimms[i].spd_data, 64); |
| } |
| } |
| |
| s->spd_type = 0; |
| int fail = 1; |
| FOR_EACH_POPULATED_DIMM(s->dimms, i) { |
| switch ((enum ddrxspd) s->dimms[i].spd_data[2]) { |
| case DDR2SPD: |
| if (s->spd_type == 0) { |
| s->spd_type = DDR2; |
| } else if (s->spd_type == DDR3) { |
| die("DIMM type mismatch\n"); |
| } |
| break; |
| case DDR3SPD: |
| default: |
| if (s->spd_type == 0) { |
| s->spd_type = DDR3; |
| } else if (s->spd_type == DDR2) { |
| die("DIMM type mismatch\n"); |
| } |
| break; |
| } |
| } |
| if (s->spd_type == DDR3) { |
| FOR_EACH_POPULATED_DIMM(s->dimms, i) { |
| s->dimms[i].sides = (s->dimms[i].spd_data[5] & 0x0f) + 1; |
| s->dimms[i].ranks = ((s->dimms[i].spd_data[7] >> 3) & 0x7) + 1; |
| s->dimms[i].chip_capacity = (s->dimms[i].spd_data[4] & 0xf); |
| s->dimms[i].banks = 8; |
| s->dimms[i].rows = ((s->dimms[i].spd_data[5] >> 3) & 0x7) + 12; |
| s->dimms[i].cols = (s->dimms[i].spd_data[5] & 0x7) + 9; |
| s->dimms[i].cas_latencies = 0xfe; |
| s->dimms[i].cas_latencies &= (s->dimms[i].spd_data[14] << 1); |
| if (s->dimms[i].cas_latencies == 0) |
| s->dimms[i].cas_latencies = 0x40; |
| s->dimms[i].tAAmin = s->dimms[i].spd_data[16]; |
| s->dimms[i].tCKmin = s->dimms[i].spd_data[12]; |
| s->dimms[i].width = s->dimms[i].spd_data[7] & 0x7; |
| s->dimms[i].page_size = s->dimms[i].width * (1 << s->dimms[i].cols); // Bytes |
| s->dimms[i].tRAS = ((s->dimms[i].spd_data[21] & 0xf) << 8) | |
| s->dimms[i].spd_data[22]; |
| s->dimms[i].tRP = s->dimms[i].spd_data[20]; |
| s->dimms[i].tRCD = s->dimms[i].spd_data[18]; |
| s->dimms[i].tWR = s->dimms[i].spd_data[17]; |
| fail = 0; |
| } |
| } else if (s->spd_type == DDR2) { |
| FOR_EACH_POPULATED_DIMM(s->dimms, i) { |
| s->dimms[i].sides = (s->dimms[i].spd_data[5] & 0x7) + 1; |
| s->dimms[i].banks = (s->dimms[i].spd_data[17] >> 2) - 1; |
| s->dimms[i].chip_capacity = s->dimms[i].banks; |
| s->dimms[i].rows = s->dimms[i].spd_data[3];// - 12; |
| s->dimms[i].cols = s->dimms[i].spd_data[4];// - 9; |
| s->dimms[i].cas_latencies = s->dimms[i].spd_data[18]; |
| if (s->dimms[i].cas_latencies == 0) |
| s->dimms[i].cas_latencies = 0x60; // 6,5 CL |
| s->dimms[i].tAAmin = s->dimms[i].spd_data[26]; |
| s->dimms[i].tCKmin = s->dimms[i].spd_data[25]; |
| s->dimms[i].width = (s->dimms[i].spd_data[13] >> 3) - 1; |
| s->dimms[i].page_size = (s->dimms[i].width+1) * (1 << s->dimms[i].cols); // Bytes |
| s->dimms[i].tRAS = s->dimms[i].spd_data[30]; |
| s->dimms[i].tRP = s->dimms[i].spd_data[27]; |
| s->dimms[i].tRCD = s->dimms[i].spd_data[29]; |
| s->dimms[i].tWR = s->dimms[i].spd_data[36]; |
| s->dimms[i].ranks = s->dimms[i].sides; // XXX |
| |
| printk(BIOS_DEBUG, "DIMM %d\n", i); |
| printk(BIOS_DEBUG, " Sides : %d\n", s->dimms[i].sides); |
| printk(BIOS_DEBUG, " Banks : %d\n", s->dimms[i].banks); |
| printk(BIOS_DEBUG, " Ranks : %d\n", s->dimms[i].ranks); |
| printk(BIOS_DEBUG, " Rows : %d\n", s->dimms[i].rows); |
| printk(BIOS_DEBUG, " Cols : %d\n", s->dimms[i].cols); |
| printk(BIOS_DEBUG, " Page size : %d\n", s->dimms[i].page_size); |
| printk(BIOS_DEBUG, " Width : %d\n", (s->dimms[i].width+1)*8); |
| fail = 0; |
| } |
| } |
| if (fail) { |
| die("No memory dimms, halt\n"); |
| } |
| |
| FOR_EACH_POPULATED_CHANNEL(s->dimms, chan) { |
| FOR_EACH_POPULATED_DIMM_IN_CHANNEL(s->dimms, chan, i) { |
| int dimm_config; |
| if (s->dimms[i].ranks == 1) { |
| if (s->dimms[i].width == 0) /* x8 */ |
| dimm_config = 1; |
| else /* x16 */ |
| dimm_config = 3; |
| } else { |
| if (s->dimms[i].width == 0) /* x8 */ |
| dimm_config = 2; |
| else |
| die("Dual-rank x16 not supported\n"); |
| } |
| s->dimm_config[chan] |= |
| dimm_config << (i % DIMMS_PER_CHANNEL) * 2; |
| } |
| printk(BIOS_DEBUG, " Config[CH%d] : %d\n", chan, s->dimm_config[chan]); |
| } |
| } |
| |
| static u8 msbpos(u8 val) //Reverse |
| { |
| u8 i; |
| for (i = 7; (i >= 0) && ((val & (1 << i)) == 0); i--); |
| return i; |
| } |
| |
| static void mchinfo_ddr2(struct sysinfo *s) |
| { |
| const u32 eax = cpuid_ext(0x04, 0).eax; |
| s->cores = ((eax >> 26) & 0x3f) + 1; |
| printk(BIOS_WARNING, "%d CPU cores\n", s->cores); |
| |
| u32 capid = pci_read_config16(PCI_DEV(0, 0, 0), 0xe8); |
| if (!(capid & (1<<(79-64)))) { |
| printk(BIOS_WARNING, "iTPM enabled\n"); |
| } |
| |
| capid = pci_read_config32(PCI_DEV(0, 0, 0), 0xe4); |
| if (!(capid & (1<<(57-32)))) { |
| printk(BIOS_WARNING, "ME enabled\n"); |
| } |
| |
| if (!(capid & (1<<(56-32)))) { |
| printk(BIOS_WARNING, "AMT enabled\n"); |
| } |
| |
| s->max_ddr2_mhz = 800; // All chipsets in x4x support up to 800MHz DDR2 |
| printk(BIOS_WARNING, "Capable of DDR2 of %d MHz or lower\n", s->max_ddr2_mhz); |
| |
| if (!(capid & (1<<(48-32)))) { |
| printk(BIOS_WARNING, "VT-d enabled\n"); |
| } |
| } |
| |
| static void sdram_detect_ram_speed(struct sysinfo *s) |
| { |
| u8 i; |
| u8 commoncas = 0; |
| u8 currcas; |
| u8 currfreq; |
| u8 maxfreq; |
| u8 freq = 0; |
| |
| // spdidx,cycletime @CAS 5 6 |
| u8 idx800[7][2] = {{0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {23,0x30}, {9,0x25}}; |
| int found = 0; |
| |
| // Find max FSB speed |
| switch (MCHBAR32(0xc00) & 0x7) { |
| case 0x0: |
| s->max_fsb = FSB_CLOCK_1066MHz; |
| break; |
| case 0x2: |
| s->max_fsb = FSB_CLOCK_800MHz; |
| break; |
| case 0x4: |
| s->max_fsb = FSB_CLOCK_1333MHz; |
| break; |
| default: |
| s->max_fsb = FSB_CLOCK_800MHz; |
| printk(BIOS_WARNING, "Can't detect FSB, setting 800MHz\n"); |
| break; |
| } |
| |
| // Max RAM speed |
| if (s->spd_type == DDR2) { |
| |
| // FIXME: Limit memory speed to 667MHz if FSB is 1333MHz |
| maxfreq = (s->max_fsb == FSB_CLOCK_1333MHz) |
| ? MEM_CLOCK_667MHz : MEM_CLOCK_800MHz; |
| |
| // Choose common CAS latency from {6,5}, 4 does not work |
| commoncas = 0x60; |
| |
| FOR_EACH_POPULATED_DIMM(s->dimms, i) { |
| commoncas &= s->dimms[i].cas_latencies; |
| } |
| if (commoncas == 0) { |
| die("No common CAS among dimms\n"); |
| } |
| |
| // Working from fastest to slowest, |
| // fast->slow 5@800 6@800 5@667 |
| found = 0; |
| for (currcas = 5; currcas <= msbpos(commoncas); currcas++) { |
| currfreq = maxfreq; |
| if (currfreq == MEM_CLOCK_800MHz) { |
| found = 1; |
| FOR_EACH_POPULATED_DIMM(s->dimms, i) { |
| if (s->dimms[i].spd_data[idx800[currcas][0]] > idx800[currcas][1]) { |
| // this is too fast |
| found = 0; |
| } |
| } |
| if (found) |
| break; |
| } |
| } |
| |
| if (!found) { |
| currcas = 5; |
| currfreq = MEM_CLOCK_667MHz; |
| found = 1; |
| FOR_EACH_POPULATED_DIMM(s->dimms, i) { |
| if (s->dimms[i].spd_data[9] > 0x30) { |
| // this is too fast |
| found = 0; |
| } |
| } |
| } |
| |
| if (!found) |
| die("No valid CAS/frequencies detected\n"); |
| |
| s->selected_timings.mem_clk = currfreq; |
| s->selected_timings.CAS = currcas; |
| |
| } else { // DDR3 |
| // Limit frequency for MCH |
| maxfreq = (s->max_ddr2_mhz == 800) ? MEM_CLOCK_800MHz : MEM_CLOCK_667MHz; |
| maxfreq >>= 3; |
| freq = MEM_CLOCK_1333MHz; |
| if (maxfreq) { |
| freq = maxfreq + 2; |
| } |
| if (freq > MEM_CLOCK_1333MHz) { |
| freq = MEM_CLOCK_1333MHz; |
| } |
| |
| // Limit DDR speed to FSB speed |
| switch (s->max_fsb) { |
| case FSB_CLOCK_800MHz: |
| if (freq > MEM_CLOCK_800MHz) { |
| freq = MEM_CLOCK_800MHz; |
| } |
| break; |
| case FSB_CLOCK_1066MHz: |
| if (freq > MEM_CLOCK_1066MHz) { |
| freq = MEM_CLOCK_1066MHz; |
| } |
| break; |
| case FSB_CLOCK_1333MHz: |
| if (freq > MEM_CLOCK_1333MHz) { |
| freq = MEM_CLOCK_1333MHz; |
| } |
| break; |
| default: |
| die("Invalid FSB\n"); |
| break; |
| } |
| |
| // TODO: CAS detection for DDR3 |
| } |
| } |
| |
| /** |
| * @param boot_path: 0 = normal, 1 = reset, 2 = resume from s3 |
| */ |
| void sdram_initialize(int boot_path, const u8 *spd_map) |
| { |
| struct sysinfo s; |
| u8 reg8; |
| |
| printk(BIOS_DEBUG, "Setting up RAM controller.\n"); |
| |
| pci_write_config8(PCI_DEV(0,0,0), 0xdf, 0xff); |
| |
| memset(&s, 0, sizeof(struct sysinfo)); |
| |
| s.boot_path = boot_path; |
| s.spd_map[0] = spd_map[0]; |
| s.spd_map[1] = spd_map[1]; |
| s.spd_map[2] = spd_map[2]; |
| s.spd_map[3] = spd_map[3]; |
| |
| /* Detect dimms per channel */ |
| s.dimms_per_ch = 2; |
| reg8 = pci_read_config8(PCI_DEV(0,0,0), 0xe9); |
| if (reg8 & 0x10) |
| s.dimms_per_ch = 1; |
| |
| printk(BIOS_DEBUG, "Dimms per channel: %d\n", s.dimms_per_ch); |
| |
| mchinfo_ddr2(&s); |
| |
| sdram_read_spds(&s); |
| |
| /* Choose Common Frequency */ |
| sdram_detect_ram_speed(&s); |
| |
| switch (s.spd_type) { |
| case DDR2: |
| raminit_ddr2(&s); |
| break; |
| case DDR3: |
| // FIXME Add: raminit_ddr3(&s); |
| break; |
| default: |
| die("Unknown DDR type\n"); |
| break; |
| } |
| |
| reg8 = pci_read_config8(PCI_DEV(0, 0x1f, 0), 0xa2); |
| pci_write_config8(PCI_DEV(0, 0x1f, 0), 0xa2, reg8 & ~0x80); |
| |
| reg8 = pci_read_config8(PCI_DEV(0,0,0), 0xf4); |
| pci_write_config8(PCI_DEV(0,0,0), 0xf4, reg8 | 1); |
| printk(BIOS_DEBUG, "RAM initialization finished.\n"); |
| } |