Aaron Durbin | 3d0071b | 2013-01-18 14:32:50 -0600 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright (C) 2012 ChromeOS Authors |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; version 2 of the License. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | */ |
| 19 | |
| 20 | #include <stdint.h> |
Aaron Durbin | 7492ec1 | 2013-02-08 22:18:04 -0600 | [diff] [blame] | 21 | #include <string.h> |
Aaron Durbin | 3d0071b | 2013-01-18 14:32:50 -0600 | [diff] [blame] | 22 | #include <cbmem.h> |
| 23 | #include <console/console.h> |
Aaron Durbin | a267161 | 2013-02-06 21:41:01 -0600 | [diff] [blame] | 24 | #include <arch/cpu.h> |
| 25 | #include <cpu/x86/bist.h> |
| 26 | #include <cpu/x86/msr.h> |
Aaron Durbin | 38d9423 | 2013-02-07 00:03:33 -0600 | [diff] [blame] | 27 | #include <cpu/x86/mtrr.h> |
| 28 | #include <cpu/x86/stack.h> |
Aaron Durbin | a267161 | 2013-02-06 21:41:01 -0600 | [diff] [blame] | 29 | #include <lib.h> |
| 30 | #include <timestamp.h> |
| 31 | #include <arch/io.h> |
Aaron Durbin | 7492ec1 | 2013-02-08 22:18:04 -0600 | [diff] [blame] | 32 | #include <arch/stages.h> |
Aaron Durbin | a267161 | 2013-02-06 21:41:01 -0600 | [diff] [blame] | 33 | #include <arch/romcc_io.h> |
| 34 | #include <device/pci_def.h> |
| 35 | #include <cpu/x86/lapic.h> |
| 36 | #include <cbmem.h> |
| 37 | #if CONFIG_CHROMEOS |
| 38 | #include <vendorcode/google/chromeos/chromeos.h> |
| 39 | #endif |
| 40 | #include "haswell.h" |
| 41 | #include "northbridge/intel/haswell/haswell.h" |
| 42 | #include "northbridge/intel/haswell/raminit.h" |
| 43 | #include "southbridge/intel/lynxpoint/pch.h" |
| 44 | #include "southbridge/intel/lynxpoint/me.h" |
Aaron Durbin | 3d0071b | 2013-01-18 14:32:50 -0600 | [diff] [blame] | 45 | |
Aaron Durbin | a267161 | 2013-02-06 21:41:01 -0600 | [diff] [blame] | 46 | |
Aaron Durbin | 38d9423 | 2013-02-07 00:03:33 -0600 | [diff] [blame] | 47 | /* The cache-as-ram assembly file calls romstage_main() after setting up |
| 48 | * cache-as-ram. romstage_main() will then call the mainboards's |
| 49 | * mainboard_romstage_entry() function. That function then calls |
| 50 | * romstage_common() below. The reason for the back and forth is to provide |
| 51 | * common entry point from cache-as-ram while still allowing for code sharing. |
| 52 | * Because we can't use global variables the stack is used for allocations -- |
| 53 | * thus the need to call back and forth. */ |
Aaron Durbin | 3d0071b | 2013-01-18 14:32:50 -0600 | [diff] [blame] | 54 | |
Aaron Durbin | 38d9423 | 2013-02-07 00:03:33 -0600 | [diff] [blame] | 55 | |
| 56 | static inline u32 *stack_push(u32 *stack, u32 value) |
| 57 | { |
| 58 | stack = &stack[-1]; |
| 59 | *stack = value; |
| 60 | return stack; |
| 61 | } |
| 62 | |
Aaron Durbin | e2d9e5b | 2013-02-08 17:38:35 -0600 | [diff] [blame] | 63 | static unsigned long choose_top_of_stack(void) |
| 64 | { |
| 65 | unsigned long stack_top; |
| 66 | #if CONFIG_RELOCATABLE_RAMSTAGE |
| 67 | stack_top = (unsigned long)cbmem_add(CBMEM_ID_RESUME_SCRATCH, |
| 68 | CONFIG_HIGH_SCRATCH_MEMORY_SIZE); |
| 69 | stack_top += CONFIG_HIGH_SCRATCH_MEMORY_SIZE; |
| 70 | #else |
| 71 | stack_top = ROMSTAGE_STACK; |
| 72 | #endif |
| 73 | return stack_top; |
| 74 | } |
| 75 | |
Aaron Durbin | 38d9423 | 2013-02-07 00:03:33 -0600 | [diff] [blame] | 76 | /* setup_romstage_stack_after_car() determines the stack to use after |
| 77 | * cache-as-ram is torn down as well as the MTRR settings to use. */ |
| 78 | static void *setup_romstage_stack_after_car(void) |
| 79 | { |
| 80 | unsigned long top_of_stack; |
| 81 | int num_mtrrs; |
| 82 | u32 *slot; |
| 83 | u32 mtrr_mask_upper; |
| 84 | |
| 85 | /* Top of stack needs to be aligned to a 4-byte boundary. */ |
Aaron Durbin | e2d9e5b | 2013-02-08 17:38:35 -0600 | [diff] [blame] | 86 | top_of_stack = choose_top_of_stack() & ~3; |
Aaron Durbin | 38d9423 | 2013-02-07 00:03:33 -0600 | [diff] [blame] | 87 | slot = (void *)top_of_stack; |
| 88 | num_mtrrs = 0; |
| 89 | |
| 90 | /* The upper bits of the MTRR mask need to set according to the number |
| 91 | * of physical address bits. */ |
| 92 | mtrr_mask_upper = (1 << ((cpuid_eax(0x80000008) & 0xff) - 32)) - 1; |
| 93 | |
| 94 | /* The order for each MTTR is value then base with upper 32-bits of |
| 95 | * each value coming before the lower 32-bits. The reasoning for |
| 96 | * this ordering is to create a stack layout like the following: |
| 97 | * +0: Number of MTRRs |
| 98 | * +4: MTTR base 0 31:0 |
| 99 | * +8: MTTR base 0 63:32 |
| 100 | * +12: MTTR mask 0 31:0 |
| 101 | * +16: MTTR mask 0 63:32 |
| 102 | * +20: MTTR base 1 31:0 |
| 103 | * +24: MTTR base 1 63:32 |
| 104 | * +28: MTTR mask 1 31:0 |
| 105 | * +32: MTTR mask 1 63:32 |
| 106 | */ |
| 107 | |
| 108 | /* Cache the ROM as WP just below 4GiB. */ |
| 109 | slot = stack_push(slot, mtrr_mask_upper); /* upper mask */ |
| 110 | slot = stack_push(slot, ~(CONFIG_ROM_SIZE - 1) | MTRRphysMaskValid); |
| 111 | slot = stack_push(slot, 0); /* upper base */ |
| 112 | slot = stack_push(slot, ~(CONFIG_ROM_SIZE - 1) | MTRR_TYPE_WRPROT); |
| 113 | num_mtrrs++; |
| 114 | |
| 115 | /* Cache RAM as WB from 0 -> CONFIG_RAMTOP. */ |
| 116 | slot = stack_push(slot, mtrr_mask_upper); /* upper mask */ |
| 117 | slot = stack_push(slot, ~(CONFIG_RAMTOP - 1) | MTRRphysMaskValid); |
| 118 | slot = stack_push(slot, 0); /* upper base */ |
| 119 | slot = stack_push(slot, 0 | MTRR_TYPE_WRBACK); |
| 120 | num_mtrrs++; |
| 121 | |
| 122 | /* Cache 8MiB below the top of ram. On haswell systems the top of |
| 123 | * ram under 4GiB is the start of the TSEG region. It is required to |
| 124 | * be 8MiB aligned. Set this area as cacheable so it can be used later |
| 125 | * for ramstage before setting up the entire RAM as cacheable. */ |
| 126 | slot = stack_push(slot, mtrr_mask_upper); /* upper mask */ |
| 127 | slot = stack_push(slot, ~((8 << 20) - 1) | MTRRphysMaskValid); |
| 128 | slot = stack_push(slot, 0); /* upper base */ |
| 129 | slot = stack_push(slot, |
| 130 | (get_top_of_ram() - (8 << 20)) | MTRR_TYPE_WRBACK); |
| 131 | num_mtrrs++; |
| 132 | |
| 133 | /* Save the number of MTTRs to setup. Return the stack location |
| 134 | * pointing to the number of MTRRs. */ |
| 135 | slot = stack_push(slot, num_mtrrs); |
| 136 | |
| 137 | return slot; |
| 138 | } |
| 139 | |
| 140 | void * __attribute__((regparm(0))) romstage_main(unsigned long bist) |
Aaron Durbin | 3d0071b | 2013-01-18 14:32:50 -0600 | [diff] [blame] | 141 | { |
| 142 | int i; |
Aaron Durbin | 38d9423 | 2013-02-07 00:03:33 -0600 | [diff] [blame] | 143 | void *romstage_stack_after_car; |
Aaron Durbin | 3d0071b | 2013-01-18 14:32:50 -0600 | [diff] [blame] | 144 | const int num_guards = 4; |
| 145 | const u32 stack_guard = 0xdeadbeef; |
| 146 | u32 *stack_base = (void *)(CONFIG_DCACHE_RAM_BASE + |
| 147 | CONFIG_DCACHE_RAM_SIZE - |
| 148 | CONFIG_DCACHE_RAM_ROMSTAGE_STACK_SIZE); |
| 149 | |
| 150 | printk(BIOS_DEBUG, "Setting up stack guards.\n"); |
| 151 | for (i = 0; i < num_guards; i++) |
| 152 | stack_base[i] = stack_guard; |
| 153 | |
Aaron Durbin | a267161 | 2013-02-06 21:41:01 -0600 | [diff] [blame] | 154 | mainboard_romstage_entry(bist); |
Aaron Durbin | 3d0071b | 2013-01-18 14:32:50 -0600 | [diff] [blame] | 155 | |
| 156 | /* Check the stack. */ |
| 157 | for (i = 0; i < num_guards; i++) { |
| 158 | if (stack_base[i] == stack_guard) |
| 159 | continue; |
| 160 | printk(BIOS_DEBUG, "Smashed stack detected in romstage!\n"); |
| 161 | } |
| 162 | |
Aaron Durbin | 38d9423 | 2013-02-07 00:03:33 -0600 | [diff] [blame] | 163 | /* Get the stack to use after cache-as-ram is torn down. */ |
| 164 | romstage_stack_after_car = setup_romstage_stack_after_car(); |
| 165 | |
Aaron Durbin | 3d0071b | 2013-01-18 14:32:50 -0600 | [diff] [blame] | 166 | #if CONFIG_CONSOLE_CBMEM |
| 167 | /* Keep this the last thing this function does. */ |
| 168 | cbmemc_reinit(); |
| 169 | #endif |
Aaron Durbin | 38d9423 | 2013-02-07 00:03:33 -0600 | [diff] [blame] | 170 | |
| 171 | return romstage_stack_after_car; |
Aaron Durbin | 3d0071b | 2013-01-18 14:32:50 -0600 | [diff] [blame] | 172 | } |
Aaron Durbin | a267161 | 2013-02-06 21:41:01 -0600 | [diff] [blame] | 173 | |
| 174 | void romstage_common(const struct romstage_params *params) |
| 175 | { |
| 176 | int boot_mode = 0; |
| 177 | int wake_from_s3; |
| 178 | int cbmem_was_initted; |
| 179 | |
| 180 | #if CONFIG_COLLECT_TIMESTAMPS |
| 181 | tsc_t start_romstage_time; |
| 182 | tsc_t before_dram_time; |
| 183 | tsc_t after_dram_time; |
| 184 | tsc_t base_time = { |
| 185 | .lo = pci_read_config32(PCI_DEV(0, 0x00, 0), 0xdc), |
| 186 | .hi = pci_read_config32(PCI_DEV(0, 0x1f, 2), 0xd0) |
| 187 | }; |
| 188 | #endif |
| 189 | |
| 190 | #if CONFIG_COLLECT_TIMESTAMPS |
| 191 | start_romstage_time = rdtsc(); |
| 192 | #endif |
| 193 | |
| 194 | if (params->bist == 0) |
| 195 | enable_lapic(); |
| 196 | |
| 197 | wake_from_s3 = early_pch_init(params->gpio_map, params->rcba_config); |
| 198 | |
| 199 | /* Halt if there was a built in self test failure */ |
| 200 | report_bist_failure(params->bist); |
| 201 | |
| 202 | /* Perform some early chipset initialization required |
| 203 | * before RAM initialization can work |
| 204 | */ |
| 205 | haswell_early_initialization(HASWELL_MOBILE); |
| 206 | printk(BIOS_DEBUG, "Back from haswell_early_initialization()\n"); |
| 207 | |
| 208 | if (wake_from_s3) { |
| 209 | #if CONFIG_HAVE_ACPI_RESUME |
| 210 | printk(BIOS_DEBUG, "Resume from S3 detected.\n"); |
| 211 | boot_mode = 2; |
| 212 | #else |
| 213 | printk(BIOS_DEBUG, "Resume from S3 detected, but disabled.\n"); |
| 214 | #endif |
| 215 | } |
| 216 | |
| 217 | /* Prepare USB controller early in S3 resume */ |
| 218 | if (boot_mode == 2) |
| 219 | enable_usb_bar(); |
| 220 | |
| 221 | post_code(0x3a); |
| 222 | params->pei_data->boot_mode = boot_mode; |
| 223 | #if CONFIG_COLLECT_TIMESTAMPS |
| 224 | before_dram_time = rdtsc(); |
| 225 | #endif |
| 226 | |
| 227 | report_platform_info(); |
| 228 | |
| 229 | sdram_initialize(params->pei_data); |
| 230 | |
| 231 | #if CONFIG_COLLECT_TIMESTAMPS |
| 232 | after_dram_time = rdtsc(); |
| 233 | #endif |
| 234 | post_code(0x3b); |
| 235 | |
| 236 | intel_early_me_status(); |
| 237 | |
| 238 | quick_ram_check(); |
| 239 | post_code(0x3e); |
| 240 | |
| 241 | #if CONFIG_EARLY_CBMEM_INIT |
| 242 | cbmem_was_initted = !cbmem_initialize(); |
| 243 | #else |
| 244 | cbmem_was_initted = cbmem_reinit((uint64_t) (get_top_of_ram() |
| 245 | - HIGH_MEMORY_SIZE)); |
| 246 | #endif |
| 247 | |
Aaron Durbin | 2ad1dba | 2013-02-07 00:51:18 -0600 | [diff] [blame] | 248 | /* Save data returned from MRC on non-S3 resumes. */ |
| 249 | if (boot_mode != 2) |
| 250 | save_mrc_data(params->pei_data); |
| 251 | |
Aaron Durbin | a267161 | 2013-02-06 21:41:01 -0600 | [diff] [blame] | 252 | #if CONFIG_HAVE_ACPI_RESUME |
| 253 | /* If there is no high memory area, we didn't boot before, so |
| 254 | * this is not a resume. In that case we just create the cbmem toc. |
| 255 | */ |
| 256 | |
| 257 | *(u32 *)CBMEM_BOOT_MODE = 0; |
| 258 | *(u32 *)CBMEM_RESUME_BACKUP = 0; |
| 259 | |
| 260 | if ((boot_mode == 2) && cbmem_was_initted) { |
Aaron Durbin | e2d9e5b | 2013-02-08 17:38:35 -0600 | [diff] [blame] | 261 | #if !CONFIG_RELOCATABLE_RAMSTAGE |
Aaron Durbin | a267161 | 2013-02-06 21:41:01 -0600 | [diff] [blame] | 262 | void *resume_backup_memory = cbmem_find(CBMEM_ID_RESUME); |
| 263 | if (resume_backup_memory) { |
| 264 | *(u32 *)CBMEM_BOOT_MODE = boot_mode; |
| 265 | *(u32 *)CBMEM_RESUME_BACKUP = (u32)resume_backup_memory; |
| 266 | } |
Aaron Durbin | e2d9e5b | 2013-02-08 17:38:35 -0600 | [diff] [blame] | 267 | #endif |
Aaron Durbin | a267161 | 2013-02-06 21:41:01 -0600 | [diff] [blame] | 268 | /* Magic for S3 resume */ |
| 269 | pci_write_config32(PCI_DEV(0, 0x00, 0), SKPAD, 0xcafed00d); |
| 270 | } else if (boot_mode == 2) { |
| 271 | /* Failed S3 resume, reset to come up cleanly */ |
| 272 | outb(0x6, 0xcf9); |
| 273 | while (1) { |
| 274 | hlt(); |
| 275 | } |
| 276 | } else { |
| 277 | pci_write_config32(PCI_DEV(0, 0x00, 0), SKPAD, 0xcafebabe); |
| 278 | } |
| 279 | #endif |
| 280 | post_code(0x3f); |
| 281 | #if CONFIG_CHROMEOS |
| 282 | init_chromeos(boot_mode); |
| 283 | #endif |
| 284 | #if CONFIG_COLLECT_TIMESTAMPS |
| 285 | timestamp_init(base_time); |
| 286 | timestamp_add(TS_START_ROMSTAGE, start_romstage_time ); |
| 287 | timestamp_add(TS_BEFORE_INITRAM, before_dram_time ); |
| 288 | timestamp_add(TS_AFTER_INITRAM, after_dram_time ); |
| 289 | timestamp_add_now(TS_END_ROMSTAGE); |
| 290 | #endif |
| 291 | } |
Aaron Durbin | 7492ec1 | 2013-02-08 22:18:04 -0600 | [diff] [blame] | 292 | |
| 293 | static inline void prepare_for_resume(void) |
| 294 | { |
Aaron Durbin | e2d9e5b | 2013-02-08 17:38:35 -0600 | [diff] [blame] | 295 | /* Only need to save memory when ramstage isn't relocatable. */ |
| 296 | #if !CONFIG_RELOCATABLE_RAMSTAGE |
Aaron Durbin | 7492ec1 | 2013-02-08 22:18:04 -0600 | [diff] [blame] | 297 | #if CONFIG_HAVE_ACPI_RESUME |
| 298 | /* Back up the OS-controlled memory where ramstage will be loaded. */ |
| 299 | if (*(u32 *)CBMEM_BOOT_MODE == 2) { |
| 300 | void *src = (void *)CONFIG_RAMBASE; |
| 301 | void *dest = *(void **)CBMEM_RESUME_BACKUP; |
| 302 | memcpy(dest, src, HIGH_MEMORY_SAVE); |
| 303 | } |
| 304 | #endif |
Aaron Durbin | e2d9e5b | 2013-02-08 17:38:35 -0600 | [diff] [blame] | 305 | #endif |
Aaron Durbin | 7492ec1 | 2013-02-08 22:18:04 -0600 | [diff] [blame] | 306 | } |
| 307 | |
| 308 | void romstage_after_car(void) |
| 309 | { |
| 310 | prepare_for_resume(); |
| 311 | /* Load the ramstage. */ |
| 312 | copy_and_run(0); |
| 313 | } |