Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; version 2 of the License. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | */ |
| 15 | |
| 16 | #include <commonlib/helpers.h> |
| 17 | #include <cpu/x86/cache.h> |
| 18 | #include <cpu/x86/cr.h> |
Elyes HAOUAS | 419bfbc | 2018-10-01 08:47:51 +0200 | [diff] [blame] | 19 | #include <cpu/x86/msr.h> |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 20 | #include <cpu/x86/mtrr.h> |
| 21 | #include <cpu/x86/post_code.h> |
| 22 | #include <rules.h> |
| 23 | #include <intelblocks/msr.h> |
| 24 | |
| 25 | .global bootblock_pre_c_entry |
| 26 | bootblock_pre_c_entry: |
| 27 | |
| 28 | post_code(0x20) |
| 29 | |
Arthur Heymans | c4772b9 | 2019-04-14 18:38:35 +0200 | [diff] [blame] | 30 | movl $no_reset, %esp /* return address */ |
| 31 | jmp check_mtrr /* Check if CPU properly reset */ |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 32 | |
| 33 | no_reset: |
| 34 | post_code(0x21) |
| 35 | |
| 36 | /* Clear/disable fixed MTRRs */ |
| 37 | mov $fixed_mtrr_list_size, %ebx |
| 38 | xor %eax, %eax |
| 39 | xor %edx, %edx |
| 40 | |
| 41 | clear_fixed_mtrr: |
| 42 | add $-2, %ebx |
| 43 | movzwl fixed_mtrr_list(%ebx), %ecx |
| 44 | wrmsr |
| 45 | jnz clear_fixed_mtrr |
| 46 | |
| 47 | post_code(0x22) |
| 48 | |
| 49 | /* Figure put how many MTRRs we have, and clear them out */ |
| 50 | mov $MTRR_CAP_MSR, %ecx |
| 51 | rdmsr |
| 52 | movzb %al, %ebx /* Number of variable MTRRs */ |
| 53 | mov $MTRR_PHYS_BASE(0), %ecx |
| 54 | xor %eax, %eax |
| 55 | xor %edx, %edx |
| 56 | |
| 57 | clear_var_mtrr: |
| 58 | wrmsr |
| 59 | inc %ecx |
| 60 | wrmsr |
| 61 | inc %ecx |
| 62 | dec %ebx |
| 63 | jnz clear_var_mtrr |
| 64 | |
| 65 | post_code(0x23) |
| 66 | |
| 67 | /* Configure default memory type to uncacheable (UC) */ |
| 68 | mov $MTRR_DEF_TYPE_MSR, %ecx |
| 69 | rdmsr |
| 70 | /* Clear enable bits and set default type to UC. */ |
| 71 | and $~(MTRR_DEF_TYPE_MASK | MTRR_DEF_TYPE_EN | \ |
| 72 | MTRR_DEF_TYPE_FIX_EN), %eax |
| 73 | wrmsr |
| 74 | |
| 75 | /* Configure MTRR_PHYS_MASK_HIGH for proper addressing above 4GB |
| 76 | * based on the physical address size supported for this processor |
| 77 | * This is based on read from CPUID EAX = 080000008h, EAX bits [7:0] |
| 78 | * |
| 79 | * Examples: |
| 80 | * MTRR_PHYS_MASK_HIGH = 00000000Fh For 36 bit addressing |
| 81 | * MTRR_PHYS_MASK_HIGH = 0000000FFh For 40 bit addressing |
| 82 | */ |
| 83 | |
Elyes HAOUAS | 05498a2 | 2018-05-28 16:26:43 +0200 | [diff] [blame] | 84 | movl $0x80000008, %eax /* Address sizes leaf */ |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 85 | cpuid |
| 86 | sub $32, %al |
| 87 | movzx %al, %eax |
| 88 | xorl %esi, %esi |
| 89 | bts %eax, %esi |
| 90 | dec %esi /* esi <- MTRR_PHYS_MASK_HIGH */ |
| 91 | |
| 92 | post_code(0x24) |
| 93 | |
| 94 | #if ((CONFIG_DCACHE_RAM_SIZE & (CONFIG_DCACHE_RAM_SIZE - 1)) == 0) |
| 95 | /* Configure CAR region as write-back (WB) */ |
| 96 | mov $MTRR_PHYS_BASE(0), %ecx |
| 97 | mov $CONFIG_DCACHE_RAM_BASE, %eax |
| 98 | or $MTRR_TYPE_WRBACK, %eax |
| 99 | xor %edx,%edx |
| 100 | wrmsr |
| 101 | |
| 102 | /* Configure the MTRR mask for the size region */ |
| 103 | mov $MTRR_PHYS_MASK(0), %ecx |
| 104 | mov $CONFIG_DCACHE_RAM_SIZE, %eax /* size mask */ |
| 105 | dec %eax |
| 106 | not %eax |
| 107 | or $MTRR_PHYS_MASK_VALID, %eax |
| 108 | movl %esi, %edx /* edx <- MTRR_PHYS_MASK_HIGH */ |
| 109 | wrmsr |
| 110 | #elif (CONFIG_DCACHE_RAM_SIZE == 768 * KiB) /* 768 KiB */ |
| 111 | /* Configure CAR region as write-back (WB) */ |
| 112 | mov $MTRR_PHYS_BASE(0), %ecx |
| 113 | mov $CONFIG_DCACHE_RAM_BASE, %eax |
| 114 | or $MTRR_TYPE_WRBACK, %eax |
| 115 | xor %edx,%edx |
| 116 | wrmsr |
| 117 | |
| 118 | mov $MTRR_PHYS_MASK(0), %ecx |
| 119 | mov $(512 * KiB), %eax /* size mask */ |
| 120 | dec %eax |
| 121 | not %eax |
| 122 | or $MTRR_PHYS_MASK_VALID, %eax |
| 123 | movl %esi, %edx /* edx <- MTRR_PHYS_MASK_HIGH */ |
| 124 | wrmsr |
| 125 | |
| 126 | mov $MTRR_PHYS_BASE(1), %ecx |
| 127 | mov $(CONFIG_DCACHE_RAM_BASE + 512 * KiB), %eax |
| 128 | or $MTRR_TYPE_WRBACK, %eax |
| 129 | xor %edx,%edx |
| 130 | wrmsr |
| 131 | |
| 132 | mov $MTRR_PHYS_MASK(1), %ecx |
| 133 | mov $(256 * KiB), %eax /* size mask */ |
| 134 | dec %eax |
| 135 | not %eax |
| 136 | or $MTRR_PHYS_MASK_VALID, %eax |
| 137 | movl %esi, %edx /* edx <- MTRR_PHYS_MASK_HIGH */ |
| 138 | wrmsr |
| 139 | #else |
| 140 | #error "DCACHE_RAM_SIZE is not a power of 2 and setup code is missing" |
| 141 | #endif |
| 142 | post_code(0x25) |
| 143 | |
| 144 | /* Enable variable MTRRs */ |
| 145 | mov $MTRR_DEF_TYPE_MSR, %ecx |
| 146 | rdmsr |
| 147 | or $MTRR_DEF_TYPE_EN, %eax |
| 148 | wrmsr |
| 149 | |
| 150 | /* Enable caching */ |
| 151 | mov %cr0, %eax |
| 152 | and $~(CR0_CD | CR0_NW), %eax |
| 153 | invd |
| 154 | mov %eax, %cr0 |
| 155 | |
Julius Werner | cd49cce | 2019-03-05 16:53:33 -0800 | [diff] [blame] | 156 | #if CONFIG(INTEL_CAR_NEM) |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 157 | jmp car_nem |
Julius Werner | cd49cce | 2019-03-05 16:53:33 -0800 | [diff] [blame] | 158 | #elif CONFIG(INTEL_CAR_CQOS) |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 159 | jmp car_cqos |
Julius Werner | cd49cce | 2019-03-05 16:53:33 -0800 | [diff] [blame] | 160 | #elif CONFIG(INTEL_CAR_NEM_ENHANCED) |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 161 | jmp car_nem_enhanced |
| 162 | #else |
| 163 | jmp .halt_forever /* In case nothing has selected */ |
| 164 | #endif |
| 165 | |
| 166 | .global car_init_done |
| 167 | car_init_done: |
| 168 | |
| 169 | post_code(0x29) |
| 170 | |
| 171 | /* Setup bootblock stack */ |
Arthur Heymans | df9cdcf | 2019-11-09 06:50:20 +0100 | [diff] [blame] | 172 | mov $_ecar_stack, %esp |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 173 | |
Aaron Durbin | 028e18f | 2017-06-23 11:14:58 -0500 | [diff] [blame] | 174 | /* Need to align stack to 16 bytes at call instruction. Account for |
| 175 | the two pushes below. */ |
| 176 | andl $0xfffffff0, %esp |
| 177 | sub $8, %esp |
| 178 | |
Subrata Banik | 5885ffe | 2019-11-14 11:08:51 +0530 | [diff] [blame] | 179 | /* push TSC value to stack */ |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 180 | movd %mm2, %eax |
| 181 | pushl %eax /* tsc[63:32] */ |
| 182 | movd %mm1, %eax |
Elyes HAOUAS | 05498a2 | 2018-05-28 16:26:43 +0200 | [diff] [blame] | 183 | pushl %eax /* tsc[31:0] */ |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 184 | |
| 185 | before_carstage: |
| 186 | post_code(0x2A) |
| 187 | |
| 188 | call bootblock_c_entry |
| 189 | /* Never reached */ |
| 190 | |
| 191 | .halt_forever: |
| 192 | post_code(POST_DEAD_CODE) |
| 193 | hlt |
| 194 | jmp .halt_forever |
| 195 | |
| 196 | fixed_mtrr_list: |
| 197 | .word MTRR_FIX_64K_00000 |
| 198 | .word MTRR_FIX_16K_80000 |
| 199 | .word MTRR_FIX_16K_A0000 |
| 200 | .word MTRR_FIX_4K_C0000 |
| 201 | .word MTRR_FIX_4K_C8000 |
| 202 | .word MTRR_FIX_4K_D0000 |
| 203 | .word MTRR_FIX_4K_D8000 |
| 204 | .word MTRR_FIX_4K_E0000 |
| 205 | .word MTRR_FIX_4K_E8000 |
| 206 | .word MTRR_FIX_4K_F0000 |
| 207 | .word MTRR_FIX_4K_F8000 |
| 208 | fixed_mtrr_list_size = . - fixed_mtrr_list |
| 209 | |
Julius Werner | cd49cce | 2019-03-05 16:53:33 -0800 | [diff] [blame] | 210 | #if CONFIG(INTEL_CAR_NEM) |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 211 | .global car_nem |
| 212 | car_nem: |
| 213 | /* Disable cache eviction (setup stage) */ |
| 214 | mov $MSR_EVICT_CTL, %ecx |
| 215 | rdmsr |
| 216 | or $0x1, %eax |
| 217 | wrmsr |
| 218 | |
| 219 | post_code(0x26) |
| 220 | |
| 221 | /* Clear the cache memory region. This will also fill up the cache */ |
| 222 | movl $CONFIG_DCACHE_RAM_BASE, %edi |
| 223 | movl $CONFIG_DCACHE_RAM_SIZE, %ecx |
| 224 | shr $0x02, %ecx |
| 225 | xor %eax, %eax |
| 226 | cld |
| 227 | rep stosl |
| 228 | |
| 229 | post_code(0x27) |
| 230 | |
| 231 | /* Disable cache eviction (run stage) */ |
| 232 | mov $MSR_EVICT_CTL, %ecx |
| 233 | rdmsr |
| 234 | or $0x2, %eax |
| 235 | wrmsr |
| 236 | |
| 237 | post_code(0x28) |
| 238 | |
| 239 | jmp car_init_done |
| 240 | |
Julius Werner | cd49cce | 2019-03-05 16:53:33 -0800 | [diff] [blame] | 241 | #elif CONFIG(INTEL_CAR_CQOS) |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 242 | .global car_cqos |
| 243 | car_cqos: |
| 244 | /* |
Naresh G Solanki | f329f0c | 2017-09-27 14:21:18 +0530 | [diff] [blame] | 245 | * Create CBM_LEN_MASK based on CBM_LEN |
| 246 | * Get CPUID.(EAX=10H, ECX=2H):EAX.CBM_LEN[bits 4:0] |
| 247 | */ |
| 248 | mov $0x10, %eax |
| 249 | mov $0x2, %ecx |
| 250 | cpuid |
| 251 | and $0x1F, %eax |
| 252 | add $1, %al |
| 253 | |
| 254 | mov $1, %ebx |
| 255 | mov %al, %cl |
| 256 | shl %cl, %ebx |
| 257 | sub $1, %ebx |
| 258 | |
| 259 | /* Store the CBM_LEN_MASK in mm3 for later use. */ |
| 260 | movd %ebx, %mm3 |
| 261 | |
| 262 | /* |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 263 | * Disable both L1 and L2 prefetcher. For yet-to-understood reason, |
| 264 | * prefetchers slow down filling cache with rep stos in CQOS mode. |
| 265 | */ |
| 266 | mov $MSR_PREFETCH_CTL, %ecx |
| 267 | rdmsr |
| 268 | or $(PREFETCH_L1_DISABLE | PREFETCH_L2_DISABLE), %eax |
| 269 | wrmsr |
| 270 | |
| 271 | #if (CONFIG_DCACHE_RAM_SIZE == CONFIG_L2_CACHE_SIZE) |
| 272 | /* |
| 273 | * If CAR size is set to full L2 size, mask is calculated as all-zeros. |
| 274 | * This is not supported by the CPU/uCode. |
| 275 | */ |
| 276 | #error "CQOS CAR may not use whole L2 cache area" |
| 277 | #endif |
| 278 | |
| 279 | /* Calculate how many bits to be used for CAR */ |
| 280 | xor %edx, %edx |
| 281 | mov $CONFIG_DCACHE_RAM_SIZE, %eax /* dividend */ |
| 282 | mov $CONFIG_CACHE_QOS_SIZE_PER_BIT, %ecx /* divisor */ |
| 283 | div %ecx /* result is in eax */ |
| 284 | mov %eax, %ecx /* save to ecx */ |
| 285 | mov $1, %ebx |
| 286 | shl %cl, %ebx |
| 287 | sub $1, %ebx /* resulting mask is is in ebx */ |
| 288 | |
| 289 | /* Set this mask for initial cache fill */ |
| 290 | mov $MSR_L2_QOS_MASK(0), %ecx |
| 291 | rdmsr |
Naresh G Solanki | f329f0c | 2017-09-27 14:21:18 +0530 | [diff] [blame] | 292 | mov %ebx, %eax |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 293 | wrmsr |
| 294 | |
| 295 | /* Set CLOS selector to 0 */ |
Elyes HAOUAS | 419bfbc | 2018-10-01 08:47:51 +0200 | [diff] [blame] | 296 | mov $IA32_PQR_ASSOC, %ecx |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 297 | rdmsr |
| 298 | and $~IA32_PQR_ASSOC_MASK, %edx /* select mask 0 */ |
| 299 | wrmsr |
| 300 | |
| 301 | /* We will need to block CAR region from evicts */ |
| 302 | mov $MSR_L2_QOS_MASK(1), %ecx |
| 303 | rdmsr |
| 304 | /* Invert bits that are to be used for cache */ |
Naresh G Solanki | f329f0c | 2017-09-27 14:21:18 +0530 | [diff] [blame] | 305 | mov %ebx, %eax |
| 306 | xor $~0, %eax /* invert 32 bits */ |
| 307 | |
| 308 | /* |
| 309 | * Use CBM_LEN_MASK stored in mm3 to set bits based on Capacity Bit |
| 310 | * Mask Length. |
| 311 | */ |
| 312 | movd %mm3, %ebx |
| 313 | and %ebx, %eax |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 314 | wrmsr |
| 315 | |
| 316 | post_code(0x26) |
| 317 | |
| 318 | /* Clear the cache memory region. This will also fill up the cache */ |
| 319 | movl $CONFIG_DCACHE_RAM_BASE, %edi |
| 320 | movl $CONFIG_DCACHE_RAM_SIZE, %ecx |
| 321 | shr $0x02, %ecx |
| 322 | xor %eax, %eax |
| 323 | cld |
| 324 | rep stosl |
| 325 | |
| 326 | post_code(0x27) |
| 327 | |
| 328 | /* Cache is populated. Use mask 1 that will block evicts */ |
Elyes HAOUAS | 419bfbc | 2018-10-01 08:47:51 +0200 | [diff] [blame] | 329 | mov $IA32_PQR_ASSOC, %ecx |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 330 | rdmsr |
| 331 | and $~IA32_PQR_ASSOC_MASK, %edx /* clear index bits first */ |
| 332 | or $1, %edx /* select mask 1 */ |
| 333 | wrmsr |
| 334 | |
| 335 | /* Enable prefetchers */ |
| 336 | mov $MSR_PREFETCH_CTL, %ecx |
| 337 | rdmsr |
| 338 | and $~(PREFETCH_L1_DISABLE | PREFETCH_L2_DISABLE), %eax |
| 339 | wrmsr |
| 340 | |
| 341 | post_code(0x28) |
| 342 | |
| 343 | jmp car_init_done |
| 344 | |
Julius Werner | cd49cce | 2019-03-05 16:53:33 -0800 | [diff] [blame] | 345 | #elif CONFIG(INTEL_CAR_NEM_ENHANCED) |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 346 | .global car_nem_enhanced |
| 347 | car_nem_enhanced: |
| 348 | /* Disable cache eviction (setup stage) */ |
| 349 | mov $MSR_EVICT_CTL, %ecx |
| 350 | rdmsr |
| 351 | or $0x1, %eax |
| 352 | wrmsr |
| 353 | post_code(0x26) |
| 354 | |
| 355 | /* Create n-way set associativity of cache */ |
| 356 | xorl %edi, %edi |
| 357 | find_llc_subleaf: |
| 358 | movl %edi, %ecx |
| 359 | movl $0x04, %eax |
| 360 | cpuid |
| 361 | inc %edi |
| 362 | and $0xe0, %al /* EAX[7:5] = Cache Level */ |
| 363 | cmp $0x60, %al /* Check to see if it is LLC */ |
| 364 | jnz find_llc_subleaf |
| 365 | |
| 366 | /* |
Subrata Banik | 8adaffc | 2019-08-10 21:43:12 +0530 | [diff] [blame] | 367 | * Set MSR 0xC91 IA32_L3_MASK_1 = 0xE/0xFE/0xFFE/0xFFFE |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 368 | * for 4/8/16 way of LLC |
| 369 | */ |
| 370 | shr $22, %ebx |
| 371 | inc %ebx |
| 372 | /* Calculate n-way associativity of LLC */ |
| 373 | mov %bl, %cl |
| 374 | |
| 375 | /* |
| 376 | * Maximizing RO cacheability while locking in the CAR to a |
| 377 | * single way since that particular way won't be victim candidate |
| 378 | * for evictions. |
Jonathan Neuschäfer | 5268b76 | 2018-02-12 12:24:25 +0100 | [diff] [blame] | 379 | * This has been done after programming LLC_WAY_MASK_1 MSR |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 380 | * with desired LLC way as mentioned below. |
| 381 | * |
| 382 | * Hence create Code and Data Size as per request |
| 383 | * Code Size (RO) : Up to 16M |
| 384 | * Data Size (RW) : Up to 256K |
| 385 | */ |
| 386 | movl $0x01, %eax |
| 387 | /* |
| 388 | * LLC Ways -> LLC_WAY_MASK_1: |
| 389 | * 4: 0x000E |
| 390 | * 8: 0x00FE |
| 391 | * 12: 0x0FFE |
| 392 | * 16: 0xFFFE |
| 393 | * |
| 394 | * These MSRs contain one bit per each way of LLC |
| 395 | * - If this bit is '0' - the way is protected from eviction |
| 396 | * - If this bit is '1' - the way is not protected from eviction |
| 397 | */ |
| 398 | shl %cl, %eax |
| 399 | subl $0x02, %eax |
Elyes HAOUAS | 419bfbc | 2018-10-01 08:47:51 +0200 | [diff] [blame] | 400 | movl $IA32_L3_MASK_1, %ecx |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 401 | xorl %edx, %edx |
| 402 | wrmsr |
| 403 | /* |
| 404 | * Set MSR 0xC92 IA32_L3_MASK_2 = 0x1 |
| 405 | * |
| 406 | * For SKL SOC, data size remains 256K consistently. |
| 407 | * Hence, creating 1-way associative cache for Data |
| 408 | */ |
Elyes HAOUAS | 419bfbc | 2018-10-01 08:47:51 +0200 | [diff] [blame] | 409 | mov $IA32_L3_MASK_2, %ecx |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 410 | mov $0x01, %eax |
| 411 | xorl %edx, %edx |
| 412 | wrmsr |
| 413 | /* |
Elyes HAOUAS | 419bfbc | 2018-10-01 08:47:51 +0200 | [diff] [blame] | 414 | * Set IA32_PQR_ASSOC = 0x02 |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 415 | * |
| 416 | * Possible values: |
| 417 | * 0: Default value, no way mask should be applied |
| 418 | * 1: Apply way mask 1 to LLC |
| 419 | * 2: Apply way mask 2 to LLC |
| 420 | * 3: Shouldn't be use in NEM Mode |
| 421 | */ |
Elyes HAOUAS | 419bfbc | 2018-10-01 08:47:51 +0200 | [diff] [blame] | 422 | movl $IA32_PQR_ASSOC, %ecx |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 423 | movl $0x02, %eax |
| 424 | xorl %edx, %edx |
| 425 | wrmsr |
| 426 | |
| 427 | movl $CONFIG_DCACHE_RAM_BASE, %edi |
| 428 | movl $CONFIG_DCACHE_RAM_SIZE, %ecx |
| 429 | shr $0x02, %ecx |
| 430 | xor %eax, %eax |
| 431 | cld |
| 432 | rep stosl |
| 433 | /* |
Elyes HAOUAS | 419bfbc | 2018-10-01 08:47:51 +0200 | [diff] [blame] | 434 | * Set IA32_PQR_ASSOC = 0x01 |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 435 | * At this stage we apply LLC_WAY_MASK_1 to the cache. |
| 436 | * i.e. way 0 is protected from eviction. |
| 437 | */ |
Elyes HAOUAS | 419bfbc | 2018-10-01 08:47:51 +0200 | [diff] [blame] | 438 | movl $IA32_PQR_ASSOC, %ecx |
Subrata Banik | 03e971c | 2017-03-07 14:02:23 +0530 | [diff] [blame] | 439 | movl $0x01, %eax |
| 440 | xorl %edx, %edx |
| 441 | wrmsr |
| 442 | |
| 443 | post_code(0x27) |
| 444 | /* |
| 445 | * Enable No-Eviction Mode Run State by setting |
| 446 | * NO_EVICT_MODE MSR 2E0h bit [1] = '1'. |
| 447 | */ |
| 448 | |
| 449 | movl $MSR_EVICT_CTL, %ecx |
| 450 | rdmsr |
| 451 | orl $0x02, %eax |
| 452 | wrmsr |
| 453 | |
| 454 | post_code(0x28) |
| 455 | |
| 456 | jmp car_init_done |
| 457 | #endif |