Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright (C) 2011 The Chromium OS Authors. All rights reserved. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License as |
| 8 | * published by the Free Software Foundation; version 2 of |
| 9 | * the License. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 15 | */ |
| 16 | |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 17 | #include <arch/io.h> |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 18 | #include <console/console.h> |
| 19 | #include <delay.h> |
Nicola Corna | 14604da | 2018-05-15 17:15:03 +0200 | [diff] [blame] | 20 | #include <device/pci_def.h> |
Patrick Georgi | 546953c | 2014-11-29 10:38:17 +0100 | [diff] [blame] | 21 | #include <halt.h> |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 22 | #include <string.h> |
Nathaniel Roach | 52f0871 | 2017-09-09 19:58:08 +0800 | [diff] [blame] | 23 | #include <timestamp.h> |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 24 | #include "me.h" |
| 25 | #include "pch.h" |
| 26 | |
| 27 | static const char *me_ack_values[] = { |
| 28 | [ME_HFS_ACK_NO_DID] = "No DID Ack received", |
| 29 | [ME_HFS_ACK_RESET] = "Non-power cycle reset", |
| 30 | [ME_HFS_ACK_PWR_CYCLE] = "Power cycle reset", |
| 31 | [ME_HFS_ACK_S3] = "Go to S3", |
| 32 | [ME_HFS_ACK_S4] = "Go to S4", |
| 33 | [ME_HFS_ACK_S5] = "Go to S5", |
| 34 | [ME_HFS_ACK_GBL_RESET] = "Global Reset", |
| 35 | [ME_HFS_ACK_CONTINUE] = "Continue to boot" |
| 36 | }; |
| 37 | |
| 38 | static inline void pci_read_dword_ptr(void *ptr, int offset) |
| 39 | { |
| 40 | u32 dword = pci_read_config32(PCH_ME_DEV, offset); |
| 41 | memcpy(ptr, &dword, sizeof(dword)); |
| 42 | } |
| 43 | |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 44 | void intel_early_me_status(void) |
| 45 | { |
| 46 | struct me_hfs hfs; |
| 47 | struct me_gmes gmes; |
Nicola Corna | 14604da | 2018-05-15 17:15:03 +0200 | [diff] [blame] | 48 | u32 id = pci_read_config32(PCH_ME_DEV, PCI_VENDOR_ID); |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 49 | |
Nicola Corna | 14604da | 2018-05-15 17:15:03 +0200 | [diff] [blame] | 50 | if ((id == 0xffffffff) || (id == 0x00000000) || |
| 51 | (id == 0x0000ffff) || (id == 0xffff0000)) { |
| 52 | printk(BIOS_DEBUG, "Missing Intel ME PCI device.\n"); |
| 53 | } else { |
| 54 | pci_read_dword_ptr(&hfs, PCI_ME_HFS); |
| 55 | pci_read_dword_ptr(&gmes, PCI_ME_GMES); |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 56 | |
Nicola Corna | 14604da | 2018-05-15 17:15:03 +0200 | [diff] [blame] | 57 | intel_me_status(&hfs, &gmes); |
| 58 | } |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 59 | } |
| 60 | |
| 61 | int intel_early_me_init(void) |
| 62 | { |
| 63 | int count; |
| 64 | struct me_uma uma; |
| 65 | struct me_hfs hfs; |
| 66 | |
| 67 | printk(BIOS_INFO, "Intel ME early init\n"); |
| 68 | |
| 69 | /* Wait for ME UMA SIZE VALID bit to be set */ |
| 70 | for (count = ME_RETRY; count > 0; --count) { |
| 71 | pci_read_dword_ptr(&uma, PCI_ME_UMA); |
| 72 | if (uma.valid) |
| 73 | break; |
| 74 | udelay(ME_DELAY); |
| 75 | } |
| 76 | if (!count) { |
| 77 | printk(BIOS_ERR, "ERROR: ME is not ready!\n"); |
| 78 | return -1; |
| 79 | } |
| 80 | |
| 81 | /* Check for valid firmware */ |
| 82 | pci_read_dword_ptr(&hfs, PCI_ME_HFS); |
| 83 | if (hfs.fpt_bad) { |
| 84 | printk(BIOS_WARNING, "WARNING: ME has bad firmware\n"); |
| 85 | return -1; |
| 86 | } |
| 87 | |
| 88 | printk(BIOS_INFO, "Intel ME firmware is ready\n"); |
| 89 | return 0; |
| 90 | } |
| 91 | |
| 92 | int intel_early_me_uma_size(void) |
| 93 | { |
| 94 | struct me_uma uma; |
| 95 | |
| 96 | pci_read_dword_ptr(&uma, PCI_ME_UMA); |
| 97 | if (uma.valid) { |
| 98 | printk(BIOS_DEBUG, "ME: Requested %uMB UMA\n", uma.size); |
| 99 | return uma.size; |
| 100 | } |
| 101 | |
| 102 | printk(BIOS_DEBUG, "ME: Invalid UMA size\n"); |
| 103 | return 0; |
| 104 | } |
| 105 | |
| 106 | static inline void set_global_reset(int enable) |
| 107 | { |
| 108 | u32 etr3 = pci_read_config32(PCH_LPC_DEV, ETR3); |
| 109 | |
| 110 | /* Clear CF9 Without Resume Well Reset Enable */ |
| 111 | etr3 &= ~ETR3_CWORWRE; |
| 112 | |
| 113 | /* CF9GR indicates a Global Reset */ |
| 114 | if (enable) |
| 115 | etr3 |= ETR3_CF9GR; |
| 116 | else |
| 117 | etr3 &= ~ETR3_CF9GR; |
| 118 | |
| 119 | pci_write_config32(PCH_LPC_DEV, ETR3, etr3); |
| 120 | } |
| 121 | |
| 122 | int intel_early_me_init_done(u8 status) |
| 123 | { |
Alexandru Gagniuc | ecf2eb4 | 2015-09-28 21:39:12 -0700 | [diff] [blame] | 124 | u8 reset, errorcode, opmode; |
| 125 | u16 reg16; |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 126 | u32 mebase_l, mebase_h; |
Alexandru Gagniuc | ecf2eb4 | 2015-09-28 21:39:12 -0700 | [diff] [blame] | 127 | u32 millisec; |
| 128 | u32 hfs, me_fws2; |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 129 | struct me_did did = { |
| 130 | .init_done = ME_INIT_DONE, |
| 131 | .status = status |
| 132 | }; |
Alexandru Gagniuc | ecf2eb4 | 2015-09-28 21:39:12 -0700 | [diff] [blame] | 133 | u32 meDID; |
| 134 | |
| 135 | hfs = (pci_read_config32(PCI_DEV(0, 0x16, 0), PCI_ME_HFS) & 0xff000) >> 12; |
| 136 | |
| 137 | opmode = (hfs & 0xf0) >> 4; |
| 138 | errorcode = hfs & 0xf; |
| 139 | |
| 140 | if (opmode != ME_HFS_MODE_NORMAL) { |
| 141 | printk(BIOS_NOTICE, "ME: Wrong mode : %d\n", opmode); |
| 142 | //return 0; |
| 143 | } |
| 144 | if (errorcode) { |
| 145 | printk(BIOS_NOTICE, "ME: HFS error : %d\n", errorcode); |
| 146 | //return 0; |
| 147 | } |
| 148 | |
| 149 | me_fws2 = pci_read_config32(PCI_DEV(0, 0x16, 0), 0x48); |
| 150 | printk(BIOS_NOTICE, "ME: FWS2: 0x%x\n", me_fws2); |
| 151 | printk(BIOS_NOTICE, "ME: Bist in progress: 0x%x\n", me_fws2 & 0x1); |
| 152 | printk(BIOS_NOTICE, "ME: ICC Status : 0x%x\n", (me_fws2 & 0x6) >> 1); |
| 153 | printk(BIOS_NOTICE, "ME: Invoke MEBx : 0x%x\n", (me_fws2 & 0x8) >> 3); |
| 154 | printk(BIOS_NOTICE, "ME: CPU replaced : 0x%x\n", (me_fws2 & 0x10) >> 4); |
| 155 | printk(BIOS_NOTICE, "ME: MBP ready : 0x%x\n", (me_fws2 & 0x20) >> 5); |
| 156 | printk(BIOS_NOTICE, "ME: MFS failure : 0x%x\n", (me_fws2 & 0x40) >> 6); |
| 157 | printk(BIOS_NOTICE, "ME: Warm reset req : 0x%x\n", (me_fws2 & 0x80) >> 7); |
| 158 | printk(BIOS_NOTICE, "ME: CPU repl valid : 0x%x\n", (me_fws2 & 0x100) >> 8); |
| 159 | printk(BIOS_NOTICE, "ME: (Reserved) : 0x%x\n", (me_fws2 & 0x600) >> 9); |
| 160 | printk(BIOS_NOTICE, "ME: FW update req : 0x%x\n", (me_fws2 & 0x800) >> 11); |
| 161 | printk(BIOS_NOTICE, "ME: (Reserved) : 0x%x\n", (me_fws2 & 0xf000) >> 12); |
| 162 | printk(BIOS_NOTICE, "ME: Current state : 0x%x\n", (me_fws2 & 0xff0000) >> 16); |
| 163 | printk(BIOS_NOTICE, "ME: Current PM event: 0x%x\n", (me_fws2 & 0xf000000) >> 24); |
| 164 | printk(BIOS_NOTICE, "ME: Progress code : 0x%x\n", (me_fws2 & 0xf0000000) >> 28); |
| 165 | |
Elyes HAOUAS | 1bcd7fc | 2016-07-28 21:20:04 +0200 | [diff] [blame] | 166 | // Poll CPU replaced for 50ms |
Alexandru Gagniuc | ecf2eb4 | 2015-09-28 21:39:12 -0700 | [diff] [blame] | 167 | millisec = 0; |
| 168 | while ((((me_fws2 & 0x100) >> 8) == 0) && millisec < 50) { |
| 169 | udelay(1000); |
| 170 | me_fws2 = pci_read_config32(PCI_DEV(0, 0x16, 0), 0x48); |
| 171 | millisec++; |
| 172 | } |
| 173 | if (millisec >= 50 || ((me_fws2 & 0x100) >> 8) == 0x0) { |
| 174 | printk(BIOS_NOTICE, "Waited long enough, or CPU was not replaced, continue...\n"); |
| 175 | } else if ((me_fws2 & 0x100) == 0x100) { |
| 176 | if ((me_fws2 & 0x80) == 0x80) { |
| 177 | printk(BIOS_NOTICE, "CPU was replaced & warm reset required...\n"); |
Kyösti Mälkki | d45114f | 2013-07-26 08:53:59 +0300 | [diff] [blame] | 178 | reg16 = pci_read_config16(PCI_DEV(0, 31, 0), 0xa2) & ~0x80; |
| 179 | pci_write_config16(PCI_DEV(0, 31, 0), 0xa2, reg16); |
Alexandru Gagniuc | ecf2eb4 | 2015-09-28 21:39:12 -0700 | [diff] [blame] | 180 | set_global_reset(0); |
| 181 | outb(0x6, 0xcf9); |
| 182 | halt(); |
| 183 | } |
| 184 | |
| 185 | if (((me_fws2 & 0x10) == 0x10) && (me_fws2 & 0x80) == 0x00) { |
| 186 | printk(BIOS_NOTICE, "Full training required\n"); |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | printk(BIOS_NOTICE, "PASSED! Tell ME that DRAM is ready\n"); |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 191 | |
| 192 | /* MEBASE from MESEG_BASE[35:20] */ |
| 193 | mebase_l = pci_read_config32(PCI_CPU_DEVICE, PCI_CPU_MEBASE_L); |
| 194 | mebase_h = pci_read_config32(PCI_CPU_DEVICE, PCI_CPU_MEBASE_H) & 0xf; |
| 195 | did.uma_base = (mebase_l >> 20) | (mebase_h << 12); |
| 196 | |
Alexandru Gagniuc | ecf2eb4 | 2015-09-28 21:39:12 -0700 | [diff] [blame] | 197 | meDID = did.uma_base | (1 << 28);// | (1 << 23); |
| 198 | pci_write_config32(PCI_DEV(0, 0x16, 0), PCI_ME_H_GS, meDID); |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 199 | |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 200 | /* Must wait for ME acknowledgement */ |
Nathaniel Roach | d7e0cb9 | 2017-09-09 19:59:07 +0800 | [diff] [blame] | 201 | if (opmode == ME_HFS_MODE_DEBUG) { |
| 202 | printk(BIOS_NOTICE, |
| 203 | "ME: ME is reporting as disabled, " |
| 204 | "so not waiting for a response.\n"); |
| 205 | } else { |
| 206 | timestamp_add_now(TS_ME_INFORM_DRAM_WAIT); |
| 207 | udelay(100); |
| 208 | millisec = 0; |
| 209 | do { |
| 210 | udelay(1000); |
| 211 | hfs = (pci_read_config32( |
| 212 | PCI_DEV(0, 0x16, 0), PCI_ME_HFS) & 0xfe000000) |
| 213 | >> 24; |
| 214 | millisec++; |
| 215 | } while ((((hfs & 0xf0) >> 4) != ME_HFS_BIOS_DRAM_ACK) |
| 216 | && (millisec <= 5000)); |
| 217 | timestamp_add_now(TS_ME_INFORM_DRAM_DONE); |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 218 | } |
Nathaniel Roach | d7e0cb9 | 2017-09-09 19:59:07 +0800 | [diff] [blame] | 219 | |
Alexandru Gagniuc | ecf2eb4 | 2015-09-28 21:39:12 -0700 | [diff] [blame] | 220 | |
| 221 | me_fws2 = pci_read_config32(PCI_DEV(0, 0x16, 0), 0x48); |
| 222 | printk(BIOS_NOTICE, "ME: FWS2: 0x%x\n", me_fws2); |
| 223 | printk(BIOS_NOTICE, "ME: Bist in progress: 0x%x\n", me_fws2 & 0x1); |
| 224 | printk(BIOS_NOTICE, "ME: ICC Status : 0x%x\n", (me_fws2 & 0x6) >> 1); |
| 225 | printk(BIOS_NOTICE, "ME: Invoke MEBx : 0x%x\n", (me_fws2 & 0x8) >> 3); |
| 226 | printk(BIOS_NOTICE, "ME: CPU replaced : 0x%x\n", (me_fws2 & 0x10) >> 4); |
| 227 | printk(BIOS_NOTICE, "ME: MBP ready : 0x%x\n", (me_fws2 & 0x20) >> 5); |
| 228 | printk(BIOS_NOTICE, "ME: MFS failure : 0x%x\n", (me_fws2 & 0x40) >> 6); |
| 229 | printk(BIOS_NOTICE, "ME: Warm reset req : 0x%x\n", (me_fws2 & 0x80) >> 7); |
| 230 | printk(BIOS_NOTICE, "ME: CPU repl valid : 0x%x\n", (me_fws2 & 0x100) >> 8); |
| 231 | printk(BIOS_NOTICE, "ME: (Reserved) : 0x%x\n", (me_fws2 & 0x600) >> 9); |
| 232 | printk(BIOS_NOTICE, "ME: FW update req : 0x%x\n", (me_fws2 & 0x800) >> 11); |
| 233 | printk(BIOS_NOTICE, "ME: (Reserved) : 0x%x\n", (me_fws2 & 0xf000) >> 12); |
| 234 | printk(BIOS_NOTICE, "ME: Current state : 0x%x\n", (me_fws2 & 0xff0000) >> 16); |
| 235 | printk(BIOS_NOTICE, "ME: Current PM event: 0x%x\n", (me_fws2 & 0xf000000) >> 24); |
| 236 | printk(BIOS_NOTICE, "ME: Progress code : 0x%x\n", (me_fws2 & 0xf0000000) >> 28); |
| 237 | |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 238 | |
| 239 | /* Return the requested BIOS action */ |
| 240 | printk(BIOS_NOTICE, "ME: Requested BIOS Action: %s\n", |
Alexandru Gagniuc | ecf2eb4 | 2015-09-28 21:39:12 -0700 | [diff] [blame] | 241 | me_ack_values[(hfs & 0xe) >> 1]); |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 242 | |
Alexandru Gagniuc | ecf2eb4 | 2015-09-28 21:39:12 -0700 | [diff] [blame] | 243 | reset = inb(0xcf9); |
| 244 | reset &= 0xf1; |
| 245 | switch ((hfs & 0xe) >> 1) { |
| 246 | case ME_HFS_ACK_NO_DID: |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 247 | case ME_HFS_ACK_CONTINUE: |
| 248 | /* Continue to boot */ |
| 249 | return 0; |
| 250 | case ME_HFS_ACK_RESET: |
| 251 | /* Non-power cycle reset */ |
| 252 | set_global_reset(0); |
Alexandru Gagniuc | ecf2eb4 | 2015-09-28 21:39:12 -0700 | [diff] [blame] | 253 | reset |= 0x06; |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 254 | break; |
| 255 | case ME_HFS_ACK_PWR_CYCLE: |
| 256 | /* Power cycle reset */ |
| 257 | set_global_reset(0); |
Alexandru Gagniuc | ecf2eb4 | 2015-09-28 21:39:12 -0700 | [diff] [blame] | 258 | reset |= 0x0e; |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 259 | break; |
| 260 | case ME_HFS_ACK_GBL_RESET: |
| 261 | /* Global reset */ |
| 262 | set_global_reset(1); |
Alexandru Gagniuc | ecf2eb4 | 2015-09-28 21:39:12 -0700 | [diff] [blame] | 263 | reset |= 0x0e; |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 264 | break; |
| 265 | case ME_HFS_ACK_S3: |
| 266 | case ME_HFS_ACK_S4: |
| 267 | case ME_HFS_ACK_S5: |
| 268 | break; |
| 269 | } |
| 270 | |
| 271 | /* Perform the requested reset */ |
| 272 | if (reset) { |
| 273 | outb(reset, 0xcf9); |
Patrick Georgi | 546953c | 2014-11-29 10:38:17 +0100 | [diff] [blame] | 274 | halt(); |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 275 | } |
| 276 | return -1; |
| 277 | } |