| 1 | /*␊ |
| 2 | * Copyright 2008 Islam Ahmed Zaid. All rights reserved. <azismed@gmail.com>␊ |
| 3 | * AsereBLN: 2009: cleanup and bugfix␊ |
| 4 | */␊ |
| 5 | ␊ |
| 6 | #include "libsaio.h"␊ |
| 7 | #include "platform.h"␊ |
| 8 | #include "cpu.h"␊ |
| 9 | ␊ |
| 10 | #ifndef DEBUG_CPU␊ |
| 11 | #define DEBUG_CPU 0␊ |
| 12 | #endif␊ |
| 13 | ␊ |
| 14 | #if DEBUG_CPU␊ |
| 15 | #define DBG(x...)␉␉printf(x)␊ |
| 16 | #else␊ |
| 17 | #define DBG(x...)␉␉msglog(x)␊ |
| 18 | #endif␊ |
| 19 | ␊ |
| 20 | //#define LEGACY_CPU ␊ |
| 21 | ␊ |
| 22 | // DFE: enable_PIT2 and disable_PIT2 come from older xnu␊ |
| 23 | ␊ |
| 24 | /*␊ |
| 25 | * Enable or disable timer 2.␊ |
| 26 | * Port 0x61 controls timer 2:␊ |
| 27 | * bit 0 gates the clock,␊ |
| 28 | * bit 1 gates output to speaker.␊ |
| 29 | */␊ |
| 30 | static inline void enable_PIT2(void)␊ |
| 31 | {␊ |
| 32 | /* Enable gate, disable speaker */␊ |
| 33 | __asm__ volatile(␊ |
| 34 | ␉␉␉␉␉ " inb $0x61,%%al \n\t"␊ |
| 35 | ␉␉␉␉␉ " and $0xFC,%%al \n\t" /* & ~0x03 */␊ |
| 36 | ␉␉␉␉␉ " or $1,%%al \n\t"␊ |
| 37 | ␉␉␉␉␉ " outb %%al,$0x61 \n\t"␊ |
| 38 | ␉␉␉␉␉ : : : "%al" );␊ |
| 39 | }␊ |
| 40 | ␊ |
| 41 | static inline void disable_PIT2(void)␊ |
| 42 | {␊ |
| 43 | /* Disable gate and output to speaker */␊ |
| 44 | __asm__ volatile(␊ |
| 45 | ␉␉␉␉␉ " inb $0x61,%%al \n\t"␊ |
| 46 | ␉␉␉␉␉ " and $0xFC,%%al \n\t"␉/* & ~0x03 */␊ |
| 47 | ␉␉␉␉␉ " outb %%al,$0x61 \n\t"␊ |
| 48 | ␉␉␉␉␉ : : : "%al" );␊ |
| 49 | }␊ |
| 50 | ␊ |
| 51 | // DFE: set_PIT2_mode0, poll_PIT2_gate, and measure_tsc_frequency are␊ |
| 52 | // roughly based on Linux code␊ |
| 53 | ␊ |
| 54 | /* Set the 8254 channel 2 to mode 0 with the specified value.␊ |
| 55 | In mode 0, the counter will initially set its gate low when the␊ |
| 56 | timer expires. For this to be useful, you ought to set it high␊ |
| 57 | before calling this function. The enable_PIT2 function does this.␊ |
| 58 | */␊ |
| 59 | static inline void set_PIT2_mode0(uint16_t value)␊ |
| 60 | {␊ |
| 61 | __asm__ volatile(␊ |
| 62 | ␉␉␉␉␉ " movb $0xB0,%%al \n\t"␊ |
| 63 | ␉␉␉␉␉ " outb␉%%al,$0x43␉\n\t"␊ |
| 64 | ␉␉␉␉␉ " movb␉%%dl,%%al␉\n\t"␊ |
| 65 | ␉␉␉␉␉ " outb␉%%al,$0x42␉\n\t"␊ |
| 66 | ␉␉␉␉␉ " movb␉%%dh,%%al␉\n\t"␊ |
| 67 | ␉␉␉␉␉ " outb␉%%al,$0x42"␊ |
| 68 | ␉␉␉␉␉ : : "d"(value) /*: no clobber */ );␊ |
| 69 | }␊ |
| 70 | ␊ |
| 71 | /* Returns the number of times the loop ran before the PIT2 signaled */␊ |
| 72 | static inline unsigned long poll_PIT2_gate(void)␊ |
| 73 | {␊ |
| 74 | unsigned long count = 0;␊ |
| 75 | unsigned char nmi_sc_val;␊ |
| 76 | do {␊ |
| 77 | ++count;␊ |
| 78 | __asm__ volatile(␊ |
| 79 | ␉␉␉␉␉␉ "inb␉$0x61,%0"␊ |
| 80 | ␉␉␉␉␉␉ : "=q"(nmi_sc_val) /*:*/ /* no input */ /*:*/ /* no clobber */);␊ |
| 81 | } while( (nmi_sc_val & 0x20) == 0);␊ |
| 82 | return count;␊ |
| 83 | }␊ |
| 84 | ␊ |
| 85 | #ifdef LEGACY_CPU␊ |
| 86 | static uint64_t measure_tsc_frequency(void);␊ |
| 87 | /*␊ |
| 88 | * DFE: Measures the TSC frequency in Hz (64-bit) using the ACPI PM timer␊ |
| 89 | */␊ |
| 90 | static uint64_t measure_tsc_frequency(void)␊ |
| 91 | {␊ |
| 92 | uint64_t tscStart;␊ |
| 93 | uint64_t tscEnd;␊ |
| 94 | uint64_t tscDelta = 0xffffffffffffffffULL;␊ |
| 95 | unsigned long pollCount;␊ |
| 96 | uint64_t retval = 0;␊ |
| 97 | int i;␊ |
| 98 | ␉␊ |
| 99 | /* Time how many TSC ticks elapse in 30 msec using the 8254 PIT␊ |
| 100 | * counter 2. We run this loop 3 times to make sure the cache␊ |
| 101 | * is hot and we take the minimum delta from all of the runs.␊ |
| 102 | * That is to say that we're biased towards measuring the minimum␊ |
| 103 | * number of TSC ticks that occur while waiting for the timer to␊ |
| 104 | * expire. That theoretically helps avoid inconsistencies when␊ |
| 105 | * running under a VM if the TSC is not virtualized and the host␊ |
| 106 | * steals time. The TSC is normally virtualized for VMware.␊ |
| 107 | */␊ |
| 108 | for(i = 0; i < 10; ++i)␊ |
| 109 | {␊ |
| 110 | enable_PIT2();␊ |
| 111 | set_PIT2_mode0(CALIBRATE_LATCH);␊ |
| 112 | tscStart = rdtsc64();␊ |
| 113 | pollCount = poll_PIT2_gate();␊ |
| 114 | tscEnd = rdtsc64();␊ |
| 115 | /* The poll loop must have run at least a few times for accuracy */␊ |
| 116 | if(pollCount <= 1)␊ |
| 117 | continue;␊ |
| 118 | /* The TSC must increment at LEAST once every millisecond. We␊ |
| 119 | * should have waited exactly 30 msec so the TSC delta should␊ |
| 120 | * be >= 30. Anything less and the processor is way too slow.␊ |
| 121 | */␊ |
| 122 | if((tscEnd - tscStart) <= CALIBRATE_TIME_MSEC)␊ |
| 123 | continue;␊ |
| 124 | // tscDelta = min(tscDelta, (tscEnd - tscStart))␊ |
| 125 | if( (tscEnd - tscStart) < tscDelta )␊ |
| 126 | tscDelta = tscEnd - tscStart;␊ |
| 127 | }␊ |
| 128 | /* tscDelta is now the least number of TSC ticks the processor made in␊ |
| 129 | * a timespan of 0.03 s (e.g. 30 milliseconds)␊ |
| 130 | * Linux thus divides by 30 which gives the answer in kiloHertz because␊ |
| 131 | * 1 / ms = kHz. But we're xnu and most of the rest of the code uses␊ |
| 132 | * Hz so we need to convert our milliseconds to seconds. Since we're␊ |
| 133 | * dividing by the milliseconds, we simply multiply by 1000.␊ |
| 134 | */␊ |
| 135 | ␉␊ |
| 136 | /* Unlike linux, we're not limited to 32-bit, but we do need to take care␊ |
| 137 | * that we're going to multiply by 1000 first so we do need at least some␊ |
| 138 | * arithmetic headroom. For now, 32-bit should be enough.␊ |
| 139 | * Also unlike Linux, our compiler can do 64-bit integer arithmetic.␊ |
| 140 | */␊ |
| 141 | if(tscDelta > (1ULL<<32))␊ |
| 142 | retval = 0;␊ |
| 143 | else␊ |
| 144 | {␊ |
| 145 | retval = tscDelta * 1000 / 30;␊ |
| 146 | }␊ |
| 147 | disable_PIT2();␊ |
| 148 | return retval;␊ |
| 149 | }␊ |
| 150 | #endif␊ |
| 151 | ␊ |
| 152 | ␊ |
| 153 | #define MSR_AMD_APERF 0x000000E8␊ |
| 154 | /*␊ |
| 155 | * Original comment/code:␊ |
| 156 | * "DFE: Measures the Max Performance Frequency in Hz (64-bit)"␊ |
| 157 | *␊ |
| 158 | * Measures the Actual Performance Frequency in Hz (64-bit)␊ |
| 159 | * (just a naming change, mperf --> aperf )␊ |
| 160 | */␊ |
| 161 | static uint64_t measure_aperf_frequency(void)␊ |
| 162 | {␊ |
| 163 | ␉uint64_t aperfStart;␊ |
| 164 | ␉uint64_t aperfEnd;␊ |
| 165 | ␉uint64_t aperfDelta = 0xffffffffffffffffULL;␊ |
| 166 | ␉unsigned long pollCount;␊ |
| 167 | ␉uint64_t retval = 0;␊ |
| 168 | ␉int i;␊ |
| 169 | ␉␊ |
| 170 | ␉/* Time how many APERF ticks elapse in 30 msec using the 8254 PIT␊ |
| 171 | ␉ * counter 2. We run this loop 3 times to make sure the cache␊ |
| 172 | ␉ * is hot and we take the minimum delta from all of the runs.␊ |
| 173 | ␉ * That is to say that we're biased towards measuring the minimum␊ |
| 174 | ␉ * number of APERF ticks that occur while waiting for the timer to␊ |
| 175 | ␉ * expire.␊ |
| 176 | ␉ */␊ |
| 177 | ␉for(i = 0; i < 10; ++i)␊ |
| 178 | ␉{␊ |
| 179 | ␉␉enable_PIT2();␊ |
| 180 | ␉␉set_PIT2_mode0(CALIBRATE_LATCH);␊ |
| 181 | ␉␉aperfStart = rdmsr64(MSR_AMD_APERF);␊ |
| 182 | ␉␉pollCount = poll_PIT2_gate();␊ |
| 183 | ␉␉aperfEnd = rdmsr64(MSR_AMD_APERF);␊ |
| 184 | ␉␉/* The poll loop must have run at least a few times for accuracy */␊ |
| 185 | ␉␉if (pollCount <= 1)␊ |
| 186 | ␉␉␉continue;␊ |
| 187 | ␉␉/* The TSC must increment at LEAST once every millisecond.␊ |
| 188 | ␉␉ * We should have waited exactly 30 msec so the APERF delta should␊ |
| 189 | ␉␉ * be >= 30. Anything less and the processor is way too slow.␊ |
| 190 | ␉␉ */␊ |
| 191 | ␉␉if ((aperfEnd - aperfStart) <= CALIBRATE_TIME_MSEC)␊ |
| 192 | ␉␉␉continue;␊ |
| 193 | ␉␉// tscDelta = MIN(tscDelta, (tscEnd - tscStart))␊ |
| 194 | ␉␉if ( (aperfEnd - aperfStart) < aperfDelta )␊ |
| 195 | ␉␉␉aperfDelta = aperfEnd - aperfStart;␊ |
| 196 | ␉}␊ |
| 197 | ␉/* mperfDelta is now the least number of MPERF ticks the processor made in␊ |
| 198 | ␉ * a timespan of 0.03 s (e.g. 30 milliseconds)␊ |
| 199 | ␉ */␊ |
| 200 | ␉␊ |
| 201 | ␉if (aperfDelta > (1ULL<<32))␊ |
| 202 | ␉␉retval = 0;␊ |
| 203 | ␉else␊ |
| 204 | ␉{␊ |
| 205 | ␉␉retval = aperfDelta * 1000 / 30;␊ |
| 206 | ␉}␊ |
| 207 | ␉disable_PIT2();␊ |
| 208 | ␉return retval;␊ |
| 209 | }␊ |
| 210 | ␊ |
| 211 | ␊ |
| 212 | /*␊ |
| 213 | License for x2apic_enabled, get_apicbase, compute_bclk.␊ |
| 214 | ␊ |
| 215 | Copyright (c) 2010, Intel Corporation␊ |
| 216 | All rights reserved.␊ |
| 217 | ␊ |
| 218 | Redistribution and use in source and binary forms, with or without␊ |
| 219 | modification, are permitted provided that the following conditions are met:␊ |
| 220 | ␊ |
| 221 | * Redistributions of source code must retain the above copyright notice,␊ |
| 222 | this list of conditions and the following disclaimer.␊ |
| 223 | * Redistributions in binary form must reproduce the above copyright notice,␊ |
| 224 | this list of conditions and the following disclaimer in the documentation␊ |
| 225 | and/or other materials provided with the distribution.␊ |
| 226 | * Neither the name of Intel Corporation nor the names of its contributors␊ |
| 227 | may be used to endorse or promote products derived from this software␊ |
| 228 | without specific prior written permission.␊ |
| 229 | ␊ |
| 230 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND␊ |
| 231 | ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED␊ |
| 232 | WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE␊ |
| 233 | DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR␊ |
| 234 | ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES␊ |
| 235 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;␊ |
| 236 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON␊ |
| 237 | ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT␊ |
| 238 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS␊ |
| 239 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.␊ |
| 240 | */␊ |
| 241 | static inline __attribute__((always_inline)) void rdmsr32(uint32_t msr, uint32_t * lo_data_addr, uint32_t * hi_data_addr);␊ |
| 242 | static inline __attribute__((always_inline)) void wrmsr32(uint32_t msr, uint32_t lo_data, uint32_t hi_data);␊ |
| 243 | static uint32_t x2apic_enabled(void);␊ |
| 244 | static uint32_t get_apicbase(void);␊ |
| 245 | static uint32_t compute_bclk(void);␊ |
| 246 | static inline __attribute__((always_inline)) void rdmsr32(uint32_t msr, uint32_t * lo_data_addr, uint32_t * hi_data_addr)␊ |
| 247 | { ␊ |
| 248 | __asm__ volatile(␊ |
| 249 | ␉␉␉␉␉ "rdmsr"␊ |
| 250 | ␉␉␉␉␉ : "=a" (*lo_data_addr), "=d" (*hi_data_addr)␊ |
| 251 | ␉␉␉␉␉ : "c" (msr)␊ |
| 252 | ␉␉␉␉␉ ); ␊ |
| 253 | }␉␊ |
| 254 | static inline __attribute__((always_inline)) void wrmsr32(uint32_t msr, uint32_t lo_data, uint32_t hi_data)␊ |
| 255 | {␊ |
| 256 | __asm__ __volatile__ (␊ |
| 257 | ␉␉␉␉␉␉ "wrmsr"␊ |
| 258 | ␉␉␉␉␉␉ : /* No outputs */␊ |
| 259 | ␉␉␉␉␉␉ : "c" (msr), "a" (lo_data), "d" (hi_data)␊ |
| 260 | ␉␉␉␉␉␉ );␊ |
| 261 | }␊ |
| 262 | #define MSR_APIC_BASE 0x1B␊ |
| 263 | #define APIC_TMR_INITIAL_CNT 0x380␊ |
| 264 | #define APIC_TMR_CURRENT_CNT 0x390␊ |
| 265 | #define APIC_TMR_DIVIDE_CFG 0x3E0␊ |
| 266 | #define MSR_APIC_TMR_INITIAL_CNT 0x838␊ |
| 267 | #define MSR_APIC_TMR_CURRENT_CNT 0x839␊ |
| 268 | #define MSR_APIC_TMR_DIVIDE_CFG 0x83E␊ |
| 269 | static uint32_t x2apic_enabled(void)␊ |
| 270 | {␊ |
| 271 | uint64_t temp64;␊ |
| 272 | ␉␊ |
| 273 | temp64 = rdmsr64(MSR_APIC_BASE);␊ |
| 274 | ␉␊ |
| 275 | return (uint32_t) (temp64 & (1 << 10)) ? 1 : 0;␊ |
| 276 | }␊ |
| 277 | static uint32_t get_apicbase(void)␊ |
| 278 | {␊ |
| 279 | uint64_t temp64;␊ |
| 280 | ␉␊ |
| 281 | temp64 = rdmsr64(MSR_APIC_BASE);␊ |
| 282 | ␉␊ |
| 283 | return (uint32_t) (temp64 & 0xfffff000);␊ |
| 284 | }␊ |
| 285 | static uint32_t compute_bclk(void)␊ |
| 286 | {␊ |
| 287 | uint32_t dummy;␊ |
| 288 | uint32_t start, stop;␊ |
| 289 | uint8_t temp8;␊ |
| 290 | uint16_t delay_count;␊ |
| 291 | uint32_t bclk;␊ |
| 292 | ␉␊ |
| 293 | #define DELAY_IN_US 1000␊ |
| 294 | ␉␊ |
| 295 | // Compute fixed delay as time␊ |
| 296 | // delay count = desired time * PIT frequency␊ |
| 297 | // PIT frequency = 1.193182 MHz␊ |
| 298 | delay_count = 1193182 / DELAY_IN_US;␊ |
| 299 | ␉␊ |
| 300 | // PIT channel 2 gate is controlled by IO port 0x61, bit 0␊ |
| 301 | #define PIT_CH2_LATCH_REG 0x61␊ |
| 302 | #define CH2_SPEAKER (1 << 1) // bit 1 -- 1 = speaker enabled 0 = speaker disabled␊ |
| 303 | #define CH2_GATE_IN (1 << 0) // bit 0 -- 1 = gate enabled, 0 = gate disabled␊ |
| 304 | #define CH2_GATE_OUT (1 << 5) // bit 5 -- 1 = gate latched, 0 = gate not latched␊ |
| 305 | ␉␊ |
| 306 | // PIT Command register␊ |
| 307 | #define PIT_MODE_COMMAND_REG 0x43␊ |
| 308 | #define SELECT_CH2 (2 << 6)␊ |
| 309 | #define ACCESS_MODE_LOBYTE_HIBYTE (3 << 4)␊ |
| 310 | #define MODE0_INTERRUPT_ON_TERMINAL_COUNT 0 // Despite name, no interrupts on CH2␊ |
| 311 | ␉␊ |
| 312 | // PIT Channel 2 data port␊ |
| 313 | #define PIT_CH2_DATA 0x42␊ |
| 314 | ␉␊ |
| 315 | // Disable the PIT channel 2 speaker and gate␊ |
| 316 | temp8 = inb(PIT_CH2_LATCH_REG);␊ |
| 317 | temp8 &= ~(CH2_SPEAKER | CH2_GATE_IN);␊ |
| 318 | outb(PIT_CH2_LATCH_REG, temp8);␊ |
| 319 | ␉␊ |
| 320 | // Setup command and mode␊ |
| 321 | outb(PIT_MODE_COMMAND_REG, SELECT_CH2 | ACCESS_MODE_LOBYTE_HIBYTE | MODE0_INTERRUPT_ON_TERMINAL_COUNT);␊ |
| 322 | ␉␊ |
| 323 | // Set time for fixed delay␊ |
| 324 | outb(PIT_CH2_DATA, (uint8_t) (delay_count));␊ |
| 325 | outb(PIT_CH2_DATA, (uint8_t) (delay_count >> 8));␊ |
| 326 | ␉␊ |
| 327 | // Prepare to enable channel 2 gate but leave the speaker disabled␊ |
| 328 | temp8 = inb(PIT_CH2_LATCH_REG);␊ |
| 329 | temp8 &= ~CH2_SPEAKER;␊ |
| 330 | temp8 |= CH2_GATE_IN;␊ |
| 331 | ␉␊ |
| 332 | if (x2apic_enabled())␊ |
| 333 | ␉{␊ |
| 334 | // Set APIC Timer Divide Value as 2␊ |
| 335 | wrmsr32(MSR_APIC_TMR_DIVIDE_CFG, 0, 0);␊ |
| 336 | ␉␉␊ |
| 337 | // start APIC timer with a known value␊ |
| 338 | start = ~0UL;␊ |
| 339 | wrmsr32(MSR_APIC_TMR_INITIAL_CNT, start, 0);␊ |
| 340 | }␊ |
| 341 | else␊ |
| 342 | ␉{␊ |
| 343 | // Set APIC Timer Divide Value as 2␊ |
| 344 | *(volatile uint32_t *)(uint32_t) (get_apicbase() + APIC_TMR_DIVIDE_CFG) = 0UL;␊ |
| 345 | ␉␉␊ |
| 346 | // start APIC timer with a known value␊ |
| 347 | start = ~0UL;␊ |
| 348 | *(volatile uint32_t *)(uint32_t) (get_apicbase() + APIC_TMR_INITIAL_CNT) = start;␊ |
| 349 | }␊ |
| 350 | ␉␊ |
| 351 | // Actually start the PIT channel 2␊ |
| 352 | outb(PIT_CH2_LATCH_REG, temp8);␊ |
| 353 | ␉␊ |
| 354 | // Wait for the fixed delay␊ |
| 355 | while (!(inb(PIT_CH2_LATCH_REG) & CH2_GATE_OUT));␊ |
| 356 | ␉␊ |
| 357 | if (x2apic_enabled())␊ |
| 358 | ␉{␊ |
| 359 | // read the APIC timer to determine the change that occurred over this fixed delay␊ |
| 360 | rdmsr32(MSR_APIC_TMR_CURRENT_CNT, &stop, &dummy);␊ |
| 361 | ␉␉␊ |
| 362 | // stop APIC timer␊ |
| 363 | wrmsr32(MSR_APIC_TMR_INITIAL_CNT, 0, 0);␊ |
| 364 | ␉␉␊ |
| 365 | }␊ |
| 366 | else␊ |
| 367 | ␉{␊ |
| 368 | // read the APIC timer to determine the change that occurred over this fixed delay␊ |
| 369 | stop = *(volatile uint32_t *)(uint32_t) (get_apicbase() + APIC_TMR_CURRENT_CNT);␊ |
| 370 | ␉␉␊ |
| 371 | // stop APIC timer␊ |
| 372 | *(volatile uint32_t *)(uint32_t) (get_apicbase() + APIC_TMR_INITIAL_CNT) = 0UL;␊ |
| 373 | }␊ |
| 374 | ␉␊ |
| 375 | // Disable channel 2 speaker and gate input␊ |
| 376 | temp8 = inb(PIT_CH2_LATCH_REG);␊ |
| 377 | temp8 &= ~(CH2_SPEAKER | CH2_GATE_IN);␊ |
| 378 | outb(PIT_CH2_LATCH_REG, temp8);␊ |
| 379 | ␉␊ |
| 380 | bclk = (start - stop) * 2 / DELAY_IN_US;␊ |
| 381 | ␉␊ |
| 382 | // Round bclk to the nearest 100/12 integer value␊ |
| 383 | bclk = ((((bclk * 24) + 100) / 200) * 200) / 24;␊ |
| 384 | ␉␊ |
| 385 | return bclk;␊ |
| 386 | }␊ |
| 387 | ␊ |
| 388 | ␊ |
| 389 | /*␊ |
| 390 | * Calculates the FSB and CPU frequencies using specific MSRs for each CPU␊ |
| 391 | * - multi. is read from a specific MSR. In the case of Intel, there is:␊ |
| 392 | * a max multi. (used to calculate the FSB freq.),␊ |
| 393 | * and a current multi. (used to calculate the CPU freq.)␊ |
| 394 | * - FSBFreq = TSCFreq / multi␊ |
| 395 | * - CPUFreq = FSBFreq * multi␊ |
| 396 | */␊ |
| 397 | ␊ |
| 398 | void scan_cpu(void)␊ |
| 399 | {␊ |
| 400 | ␉uint64_t␉msr = 0; ␊ |
| 401 | ␊ |
| 402 | ␊ |
| 403 | uint64_t␉Features = 0;␉␉// CPU Features like MMX, SSE2, VT ...␊ |
| 404 | ␉uint64_t␉ExtFeatures = 0; // CPU Extended Features like SYSCALL, XD, EM64T, LAHF ...␊ |
| 405 | uint64_t␉TSCFreq = 0 ;␊ |
| 406 | uint64_t FSBFreq = 0 ; ␊ |
| 407 | uint64_t CPUFreq = 0;␊ |
| 408 | ␊ |
| 409 | uint32_t␉reg[4];␊ |
| 410 | uint32_t cores_per_package = 0;␊ |
| 411 | uint32_t logical_per_package = 0;␊ |
| 412 | ␊ |
| 413 | uint32_t␉Vendor = 0;␉␉␉// Vendor␊ |
| 414 | ␉uint32_t␉Signature = 0;␉␉// Signature␊ |
| 415 | ␉uint8_t Stepping = 0;␉␉// Stepping␊ |
| 416 | ␉uint8_t Model = 0;␉␉␉// Model␊ |
| 417 | ␉uint8_t ExtModel = 0;␉␉// Extended Model␊ |
| 418 | ␉uint8_t Family = 0;␉␉␉// Family␊ |
| 419 | ␉uint8_t ExtFamily = 0;␉␉// Extended Family␊ |
| 420 | ␉uint32_t␉NoCores = 0;␉␉// No Cores per Package␊ |
| 421 | ␉uint32_t␉NoThreads = 0;␉␉// Threads per Package␊ |
| 422 | ␉uint8_t Brand = 0; ␊ |
| 423 | ␉uint32_t␉MicrocodeVersion = 0; // The microcode version number a.k.a. signature a.k.a. BIOS ID ␊ |
| 424 | ␊ |
| 425 | ␉uint8_t isMobile = 0; ␊ |
| 426 | ␉␊ |
| 427 | ␉boolean_t␉dynamic_acceleration = 0;␊ |
| 428 | ␉boolean_t␉invariant_APIC_timer = 0;␊ |
| 429 | ␉boolean_t␉fine_grain_clock_mod = 0;␊ |
| 430 | ␉␊ |
| 431 | ␉uint32_t cpuid_max_basic = 0;␊ |
| 432 | ␉uint32_t cpuid_max_ext = 0;␊ |
| 433 | ␉uint32_t␉sub_Cstates = 0;␊ |
| 434 | ␉uint32_t extensions = 0; ␊ |
| 435 | ␊ |
| 436 | ␉uint8_t␉␉maxcoef = 0, maxdiv = 0, currcoef = 0, currdiv = 0;␊ |
| 437 | char␉␉CpuBrandString[48];␉// 48 Byte Branding String ␊ |
| 438 | ␊ |
| 439 | ␉do_cpuid(0, reg);␊ |
| 440 | Vendor␉␉= reg[ebx];␊ |
| 441 | cpuid_max_basic = reg[eax];␊ |
| 442 | ␉␊ |
| 443 | if (Vendor == CPUID_VENDOR_INTEL)␊ |
| 444 | {␊ |
| 445 | do_cpuid2(0x00000004, 0, reg);␊ |
| 446 | cores_per_package␉␉= bitfield(reg[eax], 31, 26) + 1;␊ |
| 447 | } ␊ |
| 448 | else if (Vendor != CPUID_VENDOR_AMD)␊ |
| 449 | {␊ |
| 450 | stop("Error: CPU unsupported\n");␊ |
| 451 | return;␊ |
| 452 | }␊ |
| 453 | ␉␊ |
| 454 | /* get extended cpuid results */␊ |
| 455 | ␉do_cpuid(0x80000000, reg);␊ |
| 456 | ␉cpuid_max_ext = reg[eax]; ␊ |
| 457 | ␊ |
| 458 | ␉/* Begin of Copyright: from Apple's XNU cpuid.c */␊ |
| 459 | ␉␊ |
| 460 | ␉/* get brand string (if supported) */␊ |
| 461 | ␉if (cpuid_max_ext > 0x80000004)␊ |
| 462 | ␉{␉␉␊ |
| 463 | char str[128], *s;␊ |
| 464 | ␉␉/*␊ |
| 465 | ␉␉ * The brand string 48 bytes (max), guaranteed to␊ |
| 466 | ␉␉ * be NUL terminated.␊ |
| 467 | ␉␉ */␊ |
| 468 | ␉␉do_cpuid(0x80000002, reg);␊ |
| 469 | ␉␉bcopy((char *)reg, &str[0], 16);␊ |
| 470 | ␉␉do_cpuid(0x80000003, reg);␊ |
| 471 | ␉␉bcopy((char *)reg, &str[16], 16);␊ |
| 472 | ␉␉do_cpuid(0x80000004, reg);␊ |
| 473 | ␉␉bcopy((char *)reg, &str[32], 16);␊ |
| 474 | ␉␉for (s = str; *s != '\0'; s++)␊ |
| 475 | ␉␉{␊ |
| 476 | ␉␉␉if (*s != ' ') break;␊ |
| 477 | ␉␉}␊ |
| 478 | ␉␉␊ |
| 479 | ␉␉strlcpy(CpuBrandString,␉s, sizeof(CpuBrandString));␊ |
| 480 | ␉␉␊ |
| 481 | ␉␉if (!strncmp(CpuBrandString, CPUID_STRING_UNKNOWN, min(sizeof(CpuBrandString), (unsigned)strlen(CPUID_STRING_UNKNOWN) + 1)))␊ |
| 482 | ␉␉{␊ |
| 483 | /*␊ |
| 484 | * This string means we have a firmware-programmable brand string,␊ |
| 485 | * and the firmware couldn't figure out what sort of CPU we have.␊ |
| 486 | */␊ |
| 487 | CpuBrandString[0] = '\0';␊ |
| 488 | }␊ |
| 489 | ␉} ␊ |
| 490 | ␉␊ |
| 491 | /*␊ |
| 492 | ␉ * Get processor signature and decode␊ |
| 493 | ␉ * and bracket this with the approved procedure for reading the␊ |
| 494 | ␉ * the microcode version number a.k.a. signature a.k.a. BIOS ID␊ |
| 495 | ␉ */␊ |
| 496 | if (Vendor == CPUID_VENDOR_INTEL )␊ |
| 497 | {␊ |
| 498 | wrmsr64(MSR_IA32_BIOS_SIGN_ID, 0);␊ |
| 499 | do_cpuid(1, reg);␊ |
| 500 | MicrocodeVersion =␊ |
| 501 | (uint32_t) (rdmsr64(MSR_IA32_BIOS_SIGN_ID) >> 32);␉␊ |
| 502 | }␊ |
| 503 | else if (Vendor != CPUID_VENDOR_AMD)␊ |
| 504 | do_cpuid(1, reg);␊ |
| 505 | ␉␊ |
| 506 | ␉Signature = reg[eax];␊ |
| 507 | ␉Stepping = bitfield(reg[eax], 3, 0);␊ |
| 508 | ␉Model = bitfield(reg[eax], 7, 4);␊ |
| 509 | ␉Family = bitfield(reg[eax], 11, 8);␊ |
| 510 | ␉ExtModel = bitfield(reg[eax], 19, 16);␊ |
| 511 | ␉ExtFamily = bitfield(reg[eax], 27, 20);␊ |
| 512 | ␉Brand = bitfield(reg[ebx], 7, 0);␊ |
| 513 | ␉Features = quad(reg[ecx], reg[edx]);␊ |
| 514 | ␉␊ |
| 515 | /* Fold extensions into family/model */␊ |
| 516 | ␉if (Family == 0x0f)␊ |
| 517 | ␉␉Family += ExtFamily;␊ |
| 518 | ␉if (Family == 0x0f || Family == 0x06)␊ |
| 519 | ␉␉Model += (ExtModel << 4);␊ |
| 520 | ␊ |
| 521 | if (Features & CPUID_FEATURE_HTT)␊ |
| 522 | ␉␉logical_per_package =␊ |
| 523 | bitfield(reg[ebx], 23, 16);␊ |
| 524 | ␉else␊ |
| 525 | ␉␉logical_per_package = 1;␊ |
| 526 | ␉␊ |
| 527 | ␉if (cpuid_max_ext >= 0x80000001)␊ |
| 528 | ␉{␊ |
| 529 | ␉␉do_cpuid(0x80000001, reg);␊ |
| 530 | ␉␉ExtFeatures =␊ |
| 531 | quad(reg[ecx], reg[edx]);␊ |
| 532 | ␉␉␊ |
| 533 | ␉}␊ |
| 534 | ␉␊ |
| 535 | ␉if (cpuid_max_ext >= 0x80000007)␊ |
| 536 | ␉{␊ |
| 537 | ␉␉do_cpuid(0x80000007, reg); ␊ |
| 538 | ␉␉␊ |
| 539 | ␉␉/* Fold in the Invariant TSC feature bit, if present */␊ |
| 540 | ␉␉ExtFeatures |=␊ |
| 541 | reg[edx] & (uint32_t)CPUID_EXTFEATURE_TSCI;␊ |
| 542 | ␉␉␊ |
| 543 | if (Vendor == CPUID_VENDOR_AMD)␊ |
| 544 | {␊ |
| 545 | /* Fold in the Hardware P-State control feature bit, if present */␊ |
| 546 | ␉␉␉ExtFeatures |=␊ |
| 547 | reg[edx] & (uint32_t)_Bit(7);␊ |
| 548 | ␊ |
| 549 | /* Fold in the read-only effective frequency interface feature bit, if present */␊ |
| 550 | ExtFeatures |=␊ |
| 551 | reg[edx] & (uint32_t)_Bit(10);␊ |
| 552 | }␊ |
| 553 | ␉␉␊ |
| 554 | ␉} ␊ |
| 555 | ␉␊ |
| 556 | if (Vendor == CPUID_VENDOR_AMD )␊ |
| 557 | {␊ |
| 558 | if (cpuid_max_ext >= 0x80000008)␊ |
| 559 | {␊ |
| 560 | if (Features & CPUID_FEATURE_HTT) ␊ |
| 561 | {␊ |
| 562 | do_cpuid(0x80000008, reg);␊ |
| 563 | cores_per_package␉␉= bitfield(reg[ecx], 7 , 0) + 1; // NC + 1␊ |
| 564 | }␊ |
| 565 | }␉␉␊ |
| 566 | }␉␊ |
| 567 | if (cpuid_max_basic >= 0x5) { ␊ |
| 568 | ␉␉/*␊ |
| 569 | ␉␉ * Extract the Monitor/Mwait Leaf info:␊ |
| 570 | ␉␉ */␊ |
| 571 | ␉␉do_cpuid(5, reg);␊ |
| 572 | if (Vendor == CPUID_VENDOR_INTEL )␊ |
| 573 | {␊ |
| 574 | sub_Cstates = reg[edx];␊ |
| 575 | }␊ |
| 576 | ␊ |
| 577 | extensions = reg[ecx];␉␊ |
| 578 | ␉}␊ |
| 579 | ␉␊ |
| 580 | if (Vendor == CPUID_VENDOR_INTEL)␊ |
| 581 | {␊ |
| 582 | if (cpuid_max_basic >= 0x6)␊ |
| 583 | { ␊ |
| 584 | /*␊ |
| 585 | * The thermal and Power Leaf:␊ |
| 586 | */␊ |
| 587 | do_cpuid(6, reg);␊ |
| 588 | dynamic_acceleration = bitfield(reg[eax], 1, 1); // "Dynamic Acceleration Technology (Turbo Mode)"␊ |
| 589 | invariant_APIC_timer = bitfield(reg[eax], 2, 2); // "Invariant APIC Timer"␊ |
| 590 | fine_grain_clock_mod = bitfield(reg[eax], 4, 4);␊ |
| 591 | }␊ |
| 592 | ␊ |
| 593 | if ((Vendor == 0x756E6547 /* Intel */) && ␊ |
| 594 | (Family == 0x06))␊ |
| 595 | {␊ |
| 596 | /*␊ |
| 597 | * Find the number of enabled cores and threads␊ |
| 598 | * (which determines whether SMT/Hyperthreading is active).␊ |
| 599 | */␊ |
| 600 | switch (Model)␊ |
| 601 | {␊ |
| 602 | ␊ |
| 603 | case CPUID_MODEL_DALES_32NM:␊ |
| 604 | case CPUID_MODEL_WESTMERE:␊ |
| 605 | case CPUID_MODEL_WESTMERE_EX:␊ |
| 606 | {␊ |
| 607 | msr = rdmsr64(MSR_CORE_THREAD_COUNT);␊ |
| 608 | NoThreads = bitfield((uint32_t)msr, 15, 0);␊ |
| 609 | NoCores = bitfield((uint32_t)msr, 19, 16); ␊ |
| 610 | break;␊ |
| 611 | }␊ |
| 612 | ␊ |
| 613 | case CPUID_MODEL_NEHALEM:␊ |
| 614 | case CPUID_MODEL_FIELDS:␊ |
| 615 | case CPUID_MODEL_DALES:␊ |
| 616 | case CPUID_MODEL_NEHALEM_EX:␊ |
| 617 | case CPUID_MODEL_SANDYBRIDGE:␊ |
| 618 | case CPUID_MODEL_JAKETOWN:␊ |
| 619 | ␉␉␉␉case CPUID_MODEL_IVYBRIDGE:␊ |
| 620 | {␊ |
| 621 | msr = rdmsr64(MSR_CORE_THREAD_COUNT);␊ |
| 622 | NoThreads = bitfield((uint32_t)msr, 15, 0);␊ |
| 623 | NoCores = bitfield((uint32_t)msr, 31, 16); ␊ |
| 624 | break;␊ |
| 625 | } ␊ |
| 626 | }␊ |
| 627 | }␊ |
| 628 | }␊ |
| 629 | ␊ |
| 630 | if (NoCores == 0)␊ |
| 631 | ␉{␊ |
| 632 | if (Vendor == CPUID_VENDOR_AMD)␊ |
| 633 | {␊ |
| 634 | if (!cores_per_package) {␊ |
| 635 | //legacy method␊ |
| 636 | if ((ExtFeatures & _HBit(1)/* CmpLegacy */) && ( Features & CPUID_FEATURE_HTT) )␊ |
| 637 | cores_per_package = logical_per_package; ␊ |
| 638 | else ␊ |
| 639 | cores_per_package = 1;␊ |
| 640 | }␉␉␊ |
| 641 | }␊ |
| 642 | ␉␉NoThreads = logical_per_package;␊ |
| 643 | ␉␉NoCores = cores_per_package ? cores_per_package : 1 ;␊ |
| 644 | ␉}␊ |
| 645 | ␉␊ |
| 646 | ␉/* End of Copyright: from Apple's XNU cpuid.c */␊ |
| 647 | ␊ |
| 648 | ␉FSBFreq = (uint64_t)(compute_bclk() * 1000000);␊ |
| 649 | ␉␊ |
| 650 | #ifdef LEGACY_CPU␊ |
| 651 | ␉TSCFreq = measure_tsc_frequency();␊ |
| 652 | #endif␉␊ |
| 653 | ␉␊ |
| 654 | if (Vendor == CPUID_VENDOR_AMD)␊ |
| 655 | {␊ |
| 656 | ␉␉␊ |
| 657 | #define K8_FIDVID_STATUS␉␉0xC0010042␊ |
| 658 | #define K10_COFVID_STATUS␉␉0xC0010071␊ |
| 659 | if (ExtFeatures & _Bit(10))␊ |
| 660 | {␉␉␊ |
| 661 | CPUFreq = measure_aperf_frequency();␊ |
| 662 | }␊ |
| 663 | ␊ |
| 664 | if ((Vendor == CPUID_VENDOR_AMD) && (Family == 0x0f))␊ |
| 665 | {␊ |
| 666 | switch(ExtFamily)␊ |
| 667 | {␊ |
| 668 | case 0x00: /* K8 */␊ |
| 669 | msr = rdmsr64(K8_FIDVID_STATUS);␊ |
| 670 | maxcoef = bitfield(msr, 21, 16) / 2 + 4;␊ |
| 671 | currcoef = bitfield(msr, 5, 0) / 2 + 4;␊ |
| 672 | break;␊ |
| 673 | ␊ |
| 674 | case 0x01: /* K10 */␊ |
| 675 | {␊ |
| 676 | //uint32_t reg[4];␊ |
| 677 | msr = rdmsr64(K10_COFVID_STATUS);␊ |
| 678 | /*␊ |
| 679 | do_cpuid2(0x00000006, 0, reg);␊ |
| 680 | EffFreq: effective frequency interface␊ |
| 681 | if (bitfield(reg[ecx], 0, 0) == 1)␊ |
| 682 | {␊ |
| 683 | uint64_t aperf = measure_aperf_frequency();␊ |
| 684 | CPUFreq = aperf;␊ |
| 685 | }␊ |
| 686 | */␉␉␉␉ ␊ |
| 687 | // NOTE: tsc runs at the maccoeff (non turbo)␊ |
| 688 | //␉␉␉*not* at the turbo frequency.␊ |
| 689 | maxcoef␉ = bitfield(msr, 54, 49) / 2 + 4;␊ |
| 690 | currcoef = bitfield(msr, 5, 0) + 0x10;␊ |
| 691 | currdiv = 2 << bitfield(msr, 8, 6);␊ |
| 692 | ␊ |
| 693 | break;␊ |
| 694 | }␉␊ |
| 695 | case 0x05: /* K14 */␊ |
| 696 | msr = rdmsr64(K10_COFVID_STATUS);␊ |
| 697 | currcoef = (bitfield(msr, 54, 49) + 0x10) << 2;␊ |
| 698 | currdiv = (bitfield(msr, 8, 4) + 1) << 2;␊ |
| 699 | currdiv += bitfield(msr, 3, 0);␊ |
| 700 | ␊ |
| 701 | break;␊ |
| 702 | ␊ |
| 703 | case 0x02: /* K11 */␊ |
| 704 | DBG("K11 detected, but not supported !!!\n");␊ |
| 705 | // not implimented␊ |
| 706 | break;␊ |
| 707 | }␊ |
| 708 | ␊ |
| 709 | if (!FSBFreq)␊ |
| 710 | {␊ |
| 711 | if (maxcoef)␊ |
| 712 | {␊ |
| 713 | if (currdiv)␊ |
| 714 | {␊ |
| 715 | if (!currcoef) currcoef = maxcoef;␊ |
| 716 | if (!CPUFreq)␊ |
| 717 | FSBFreq = ((TSCFreq * currdiv) / currcoef);␊ |
| 718 | else␊ |
| 719 | FSBFreq = ((CPUFreq * currdiv) / currcoef);␊ |
| 720 | ␊ |
| 721 | DBG("%d.%d\n", currcoef / currdiv, ((currcoef % currdiv) * 100) / currdiv);␊ |
| 722 | } else {␊ |
| 723 | if (!CPUFreq)␊ |
| 724 | FSBFreq = (TSCFreq / maxcoef);␊ |
| 725 | else ␊ |
| 726 | FSBFreq = (CPUFreq / maxcoef);␊ |
| 727 | DBG("%d\n", currcoef);␊ |
| 728 | }␊ |
| 729 | }␊ |
| 730 | else if (currcoef)␊ |
| 731 | {␊ |
| 732 | if (currdiv)␊ |
| 733 | {␊ |
| 734 | FSBFreq = ((TSCFreq * currdiv) / currcoef);␊ |
| 735 | DBG("%d.%d\n", currcoef / currdiv, ((currcoef % currdiv) * 100) / currdiv);␊ |
| 736 | } else {␊ |
| 737 | FSBFreq = (TSCFreq / currcoef);␊ |
| 738 | DBG("%d\n", currcoef);␊ |
| 739 | }␊ |
| 740 | }␊ |
| 741 | }␊ |
| 742 | ␊ |
| 743 | }␊ |
| 744 | ␊ |
| 745 | // NOTE: This is not the approved method,␊ |
| 746 | // the method provided by AMD is: ␊ |
| 747 | // if ((PowerNow == enabled (cpuid_max_ext >= 0x80000007)) && (StartupFID(??) != MaxFID(??))) then "mobile processor present"␊ |
| 748 | ␊ |
| 749 | if (strstr(CpuBrandString, "obile")) ␊ |
| 750 | isMobile = true;␊ |
| 751 | else ␊ |
| 752 | isMobile = false;␊ |
| 753 | ␊ |
| 754 | DBG("%s platform detected.\n", isMobile?"Mobile":"Desktop");␊ |
| 755 | }␊ |
| 756 | else if ((Vendor == CPUID_VENDOR_INTEL) && ␊ |
| 757 | ␉␉␉ ((Family == 0x06) || ␊ |
| 758 | ␉␉␉ (Family == 0x0f)))␊ |
| 759 | ␉{␊ |
| 760 | ␉␉if ((Family == 0x06 && Model >= 0x0c) || ␊ |
| 761 | ␉␉␉(Family == 0x0f && Model >= 0x03))␊ |
| 762 | ␉␉{␊ |
| 763 | ␉␉␉/* Nehalem CPU model */␊ |
| 764 | ␉␉␉if (Family == 0x06 && (Model == CPUID_MODEL_NEHALEM || ␊ |
| 765 | ␉␉␉␉␉␉␉␉ Model == CPUID_MODEL_FIELDS || ␊ |
| 766 | ␉␉␉␉␉␉␉␉ Model == CPUID_MODEL_DALES || ␊ |
| 767 | ␉␉␉␉␉␉␉␉ Model == CPUID_MODEL_DALES_32NM || ␊ |
| 768 | ␉␉␉␉␉␉␉␉ Model == CPUID_MODEL_WESTMERE ||␊ |
| 769 | ␉␉␉␉␉␉␉␉ Model == CPUID_MODEL_NEHALEM_EX ||␊ |
| 770 | ␉␉␉␉␉␉␉␉ Model == CPUID_MODEL_WESTMERE_EX ||␊ |
| 771 | ␉␉␉␉␉␉␉␉ Model == CPUID_MODEL_SANDYBRIDGE ||␊ |
| 772 | ␉␉␉␉␉␉␉␉ Model == CPUID_MODEL_JAKETOWN)) ␊ |
| 773 | ␉␉␉{␊ |
| 774 | ␉␉␉␉uint8_t␉␉bus_ratio_max = 0, bus_ratio_min = 0;␊ |
| 775 | ␉␉␉␉uint32_t␉max_ratio = 0;␊ |
| 776 | ␉␉␉␉uint64_t␉flex_ratio = 0;␊ |
| 777 | ␉␉␉␉msr = rdmsr64(MSR_PLATFORM_INFO);␊ |
| 778 | #if DEBUG_CPU␊ |
| 779 | ␉␉␉␉DBG("msr(%d): platform_info %08x\n", __LINE__, msr & 0xffffffff);␊ |
| 780 | #endif␊ |
| 781 | ␉␉␉␉bus_ratio_max = (msr >> 8) & 0xff;␊ |
| 782 | ␉␉␉␉bus_ratio_min = (msr >> 40) & 0xff; ␊ |
| 783 | ␉␉␉␉msr = rdmsr64(MSR_FLEX_RATIO);␊ |
| 784 | #if DEBUG_CPU␊ |
| 785 | ␉␉␉␉DBG("msr(%d): flex_ratio %08x\n", __LINE__, msr & 0xffffffff);␊ |
| 786 | #endif␊ |
| 787 | ␉␉␉␉if ((msr >> 16) & 0x01)␊ |
| 788 | ␉␉␉␉{␊ |
| 789 | ␉␉␉␉␉flex_ratio = (msr >> 8) & 0xff;␊ |
| 790 | ␉␉␉␉␉/* bcc9: at least on the gigabyte h67ma-ud2h,␊ |
| 791 | ␉␉␉␉␉ where the cpu multipler can't be changed to␊ |
| 792 | ␉␉␉␉␉ allow overclocking, the flex_ratio msr has unexpected (to OSX)␊ |
| 793 | ␉␉␉␉␉ contents. These contents cause mach_kernel to␊ |
| 794 | ␉␉␉␉␉ fail to compute the bus ratio correctly, instead␊ |
| 795 | ␉␉␉␉␉ causing the system to crash since tscGranularity␊ |
| 796 | ␉␉␉␉␉ is inadvertently set to 0.␊ |
| 797 | ␉␉␉␉␉ */␊ |
| 798 | ␉␉␉␉␉if (flex_ratio == 0)␊ |
| 799 | ␉␉␉␉␉{␊ |
| 800 | ␉␉␉␉␉␉/* Clear bit 16 (evidently the␊ |
| 801 | ␉␉␉␉␉␉ presence bit) */␊ |
| 802 | ␉␉␉␉␉␉wrmsr64(MSR_FLEX_RATIO, (msr & 0xFFFFFFFFFFFEFFFFULL));␊ |
| 803 | ␉␉␉␉␉␉msr = rdmsr64(MSR_FLEX_RATIO);␊ |
| 804 | #if DEBUG_CPU␊ |
| 805 | ␉␉␉␉␉␉DBG("Unusable flex ratio detected. MSR Patched to %08x\n", msr & 0xffffffff);␊ |
| 806 | #endif␊ |
| 807 | ␉␉␉␉␉}␊ |
| 808 | ␉␉␉␉␉else␊ |
| 809 | ␉␉␉␉␉{␊ |
| 810 | ␉␉␉␉␉␉if (bus_ratio_max > flex_ratio)␊ |
| 811 | ␉␉␉␉␉␉{␊ |
| 812 | ␉␉␉␉␉␉␉bus_ratio_max = flex_ratio;␊ |
| 813 | ␉␉␉␉␉␉}␊ |
| 814 | ␉␉␉␉␉}␊ |
| 815 | ␉␉␉␉}␊ |
| 816 | #ifdef LEGACY_CPU␊ |
| 817 | ␉␉␉␉if (bus_ratio_max)␊ |
| 818 | ␉␉␉␉{␊ |
| 819 | ␉␉␉␉␉FSBFreq = (TSCFreq / bus_ratio_max);␊ |
| 820 | ␉␉␉␉}␊ |
| 821 | #endif␊ |
| 822 | ␉␉␉␉//valv: Turbo Ratio Limit␊ |
| 823 | ␉␉␉␉if ((Model != 0x2e) && (Model != 0x2f))␊ |
| 824 | ␉␉␉␉{␊ |
| 825 | ␉␉␉␉␉//msr = rdmsr64(MSR_TURBO_RATIO_LIMIT);␊ |
| 826 | ␉␉␉␉␉CPUFreq = bus_ratio_max * FSBFreq;␊ |
| 827 | ␉␉␉␉␉max_ratio = bus_ratio_max * 10;␊ |
| 828 | ␉␉␉␉}␊ |
| 829 | ␉␉␉␉else␊ |
| 830 | ␉␉␉␉{␊ |
| 831 | #ifdef LEGACY_CPU␊ |
| 832 | ␉␉␉␉␉CPUFreq = TSCFreq;␊ |
| 833 | #else␊ |
| 834 | ␉␉␉␉␉CPUFreq = bus_ratio_max * FSBFreq;␊ |
| 835 | #endif␊ |
| 836 | ␉␉␉␉}␉␉␉␉␉␉␉␉␊ |
| 837 | #if DEBUG_CPU␊ |
| 838 | ␉␉␉␉DBG("Sticking with [BCLK: %dMhz, Bus-Ratio: %d]\n", FSBFreq / 1000000, max_ratio);␊ |
| 839 | #endif␊ |
| 840 | ␉␉␉␉currcoef = bus_ratio_max;␊ |
| 841 | ␊ |
| 842 | TSCFreq = CPUFreq;␊ |
| 843 | ␉␉␉} ␊ |
| 844 | ␉␉␉else␊ |
| 845 | ␉␉␉{␊ |
| 846 | ␉␉␉␉msr = rdmsr64(MSR_IA32_PERF_STATUS);␊ |
| 847 | #if DEBUG_CPU␊ |
| 848 | ␉␉␉␉DBG("msr(%d): ia32_perf_stat 0x%08x\n", __LINE__, msr & 0xffffffff);␊ |
| 849 | #endif␊ |
| 850 | ␉␉␉␉currcoef = (msr >> 8) & 0x1f;␊ |
| 851 | ␉␉␉␉/* Non-integer bus ratio for the max-multi*/␊ |
| 852 | ␉␉␉␉maxdiv = (msr >> 46) & 0x01;␊ |
| 853 | ␉␉␉␉/* Non-integer bus ratio for the current-multi (undocumented)*/␊ |
| 854 | ␉␉␉␉currdiv = (msr >> 14) & 0x01;␊ |
| 855 | ␊ |
| 856 | ␉␉␉␉if ((Family == 0x06 && Model >= 0x0e) || ␊ |
| 857 | ␉␉␉␉␉(Family == 0x0f)) // This will always be model >= 3␊ |
| 858 | ␉␉␉␉{␊ |
| 859 | ␉␉␉␉␉/* On these models, maxcoef defines TSC freq */␊ |
| 860 | ␉␉␉␉␉maxcoef = (msr >> 40) & 0x1f;␊ |
| 861 | ␉␉␉␉} ␊ |
| 862 | ␉␉␉␉else ␊ |
| 863 | ␉␉␉␉{␊ |
| 864 | ␉␉␉␉␉/* On lower models, currcoef defines TSC freq */␊ |
| 865 | ␉␉␉␉␉/* XXX */␊ |
| 866 | ␉␉␉␉␉maxcoef = currcoef;␊ |
| 867 | ␉␉␉␉}␊ |
| 868 | ␉␉␉␉if (!currcoef) currcoef = maxcoef;␊ |
| 869 | #ifdef LEGACY_CPU␊ |
| 870 | ␉␉␉␉if (maxcoef) ␊ |
| 871 | ␉␉␉␉{␉␉␉␉␉␊ |
| 872 | ␉␉␉␉␉␊ |
| 873 | ␉␉␉␉␉if (maxdiv)␊ |
| 874 | ␉␉␉␉␉{␊ |
| 875 | ␉␉␉␉␉␉FSBFreq = ((TSCFreq * 2) / ((maxcoef * 2) + 1));␊ |
| 876 | ␉␉␉␉␉}␊ |
| 877 | ␉␉␉␉␉else ␊ |
| 878 | ␉␉␉␉␉{␊ |
| 879 | ␉␉␉␉␉␉FSBFreq = (TSCFreq / maxcoef);␊ |
| 880 | ␉␉␉␉␉}␊ |
| 881 | ␉␉␉␉␉␊ |
| 882 | ␉␉␉␉␉if (currdiv) ␊ |
| 883 | ␉␉␉␉␉{␊ |
| 884 | ␉␉␉␉␉␉CPUFreq = (FSBFreq * ((currcoef * 2) + 1) / 2);␊ |
| 885 | ␉␉␉␉␉}␊ |
| 886 | ␉␉␉␉␉else ␊ |
| 887 | ␉␉␉␉␉{␊ |
| 888 | ␉␉␉␉␉␉CPUFreq = (FSBFreq * currcoef);␊ |
| 889 | ␉␉␉␉␉}␊ |
| 890 | #if DEBUG_CPU␊ |
| 891 | ␉␉␉␉␉DBG("max: %d%s current: %d%s\n", maxcoef, maxdiv ? ".5" : "",currcoef, currdiv ? ".5" : "");␊ |
| 892 | #endif␊ |
| 893 | ␉␉␉␉}␊ |
| 894 | #else␊ |
| 895 | ␉␉␉␉␊ |
| 896 | ␉␉␉␉␊ |
| 897 | ␉␉␉␉if (currdiv) ␊ |
| 898 | ␉␉␉␉{␊ |
| 899 | ␉␉␉␉␉CPUFreq = (FSBFreq * ((currcoef * 2) + 1) / 2);␊ |
| 900 | ␉␉␉␉}␊ |
| 901 | ␉␉␉␉else ␊ |
| 902 | ␉␉␉␉{␊ |
| 903 | ␉␉␉␉␉CPUFreq = (FSBFreq * currcoef);␊ |
| 904 | ␉␉␉␉}␊ |
| 905 | ␉␉␉␉␊ |
| 906 | ␉␉␉␉if (maxcoef) ␊ |
| 907 | ␉␉␉␉{␊ |
| 908 | ␉␉␉␉␉if (maxdiv)␊ |
| 909 | ␉␉␉␉␉{␊ |
| 910 | ␉␉␉␉␉␉TSCFreq = (FSBFreq * ((maxcoef * 2) + 1)) / 2;␊ |
| 911 | ␉␉␉␉␉}␊ |
| 912 | ␉␉␉␉␉else ␊ |
| 913 | ␉␉␉␉␉{␊ |
| 914 | ␉␉␉␉␉␉TSCFreq = FSBFreq * maxcoef;␊ |
| 915 | ␉␉␉␉␉}␊ |
| 916 | ␉␉␉␉}␉␉␉␉␉␉␉␉␊ |
| 917 | #if DEBUG_CPU␊ |
| 918 | ␉␉␉␉DBG("max: %d%s current: %d%s\n", maxcoef, maxdiv ? ".5" : "",currcoef, currdiv ? ".5" : "");␊ |
| 919 | #endif␊ |
| 920 | ␊ |
| 921 | #endif // LEGACY_CPU␊ |
| 922 | ␉␉␉␉␊ |
| 923 | ␉␉␉}␊ |
| 924 | ␉␉}␊ |
| 925 | /* Mobile CPU ? */ ␊ |
| 926 | ␉␉//Slice ␊ |
| 927 | ␉ isMobile = false;␊ |
| 928 | ␉␉switch (Model)␊ |
| 929 | ␉␉{␊ |
| 930 | ␉␉␉case 0x0D:␊ |
| 931 | ␉␉␉␉isMobile = true; ␊ |
| 932 | ␉␉␉␉break;␉␉␉␊ |
| 933 | ␉␉␉case 0x02:␊ |
| 934 | ␉␉␉case 0x03:␊ |
| 935 | ␉␉␉case 0x04:␊ |
| 936 | ␉␉␉case 0x06:␉␊ |
| 937 | ␉␉␉␉isMobile = (rdmsr64(0x2C) & (1 << 21));␊ |
| 938 | ␉␉␉␉break;␊ |
| 939 | ␉␉␉default:␊ |
| 940 | ␉␉␉␉isMobile = (rdmsr64(0x17) & (1 << 28));␊ |
| 941 | ␉␉␉␉break;␊ |
| 942 | ␉␉}␊ |
| 943 | ␉␉␊ |
| 944 | ␉␉DBG("%s platform detected.\n",isMobile?"Mobile":"Desktop");␊ |
| 945 | ␉}␊ |
| 946 | ␉␊ |
| 947 | ␉if (!CPUFreq) CPUFreq = TSCFreq;␊ |
| 948 | if (!TSCFreq) TSCFreq = CPUFreq;␊ |
| 949 | ␊ |
| 950 | ␉if (Vendor == CPUID_VENDOR_INTEL) {␊ |
| 951 | ␉␉set_env(envDynamicAcceleration, dynamic_acceleration); ␊ |
| 952 | ␉␉set_env(envInvariantAPICTimer,␉ invariant_APIC_timer); ␊ |
| 953 | ␉␉set_env(envFineGrainClockMod, fine_grain_clock_mod);␊ |
| 954 | ␉␉set_env(envMicrocodeVersion, MicrocodeVersion); ␊ |
| 955 | ␉␉set_env(envSubCstates, sub_Cstates);␊ |
| 956 | ␉}␉ ␊ |
| 957 | ␉set_env(envVendor, Vendor);␊ |
| 958 | set_env(envModel, Model); ␊ |
| 959 | set_env(envExtModel, ExtModel); ␊ |
| 960 | ␊ |
| 961 | ␉set_env(envCPUIDMaxBasic, cpuid_max_basic);␊ |
| 962 | ␉set_env(envCPUIDMaxBasic, cpuid_max_ext);␊ |
| 963 | ␉␊ |
| 964 | set_env_ptr(envBrandString, CpuBrandString, sizeof(CpuBrandString));␊ |
| 965 | ␉set_env(envSignature, Signature); ␊ |
| 966 | ␉set_env(envStepping, Stepping); ␊ |
| 967 | ␉set_env(envFamily,␉ Family); ␊ |
| 968 | ␉set_env(envExtModel, ExtModel); ␊ |
| 969 | ␉set_env(envExtFamily, ExtFamily); ␊ |
| 970 | ␉set_env(envBrand,␉ Brand); ␊ |
| 971 | ␉set_env(envFeatures, Features);␊ |
| 972 | set_env(envExtFeatures, ExtFeatures);␊ |
| 973 | ␉␊ |
| 974 | ␉set_env(envExtensions, extensions); ␊ |
| 975 | ␉␊ |
| 976 | ␉set_env(envNoThreads,␉ NoThreads); ␊ |
| 977 | ␉set_env(envNoCores,␉␉ NoCores);␊ |
| 978 | ␉set_env(envIsMobile,␉␉ isMobile);␊ |
| 979 | ␉␊ |
| 980 | ␉set_env(envMaxCoef,␉␉ maxcoef); ␊ |
| 981 | ␉set_env(envMaxDiv,␉␉ maxdiv);␊ |
| 982 | ␉set_env(envCurrCoef,␉␉ currcoef);␊ |
| 983 | ␉set_env(envCurrDiv,␉ currdiv); ␊ |
| 984 | ␉set_env(envTSCFreq,␉ TSCFreq);␊ |
| 985 | ␉set_env(envFSBFreq,␉ FSBFreq);␊ |
| 986 | ␉set_env(envCPUFreq,␉ CPUFreq);␊ |
| 987 | ␉␊ |
| 988 | }␊ |
| 989 | |
