1 | /*␊ |
2 | * Copyright 2008 Islam Ahmed Zaid. All rights reserved. <azismed@gmail.com>␊ |
3 | * AsereBLN: 2009: cleanup and bugfix␊ |
4 | */␊ |
5 | ␊ |
6 | #ifndef __LIBSAIO_CPU_H␊ |
7 | #define __LIBSAIO_CPU_H␊ |
8 | ␊ |
9 | //#include "libsaio.h"␊ |
10 | ␊ |
11 | extern void scan_cpu(PlatformInfo_t *);␊ |
12 | ␊ |
13 | #define bit(n)␉␉␉(1ULL << (n))␊ |
14 | #define bitmask(h,l)␉␉((bit(h)|(bit(h)-1)) & ~(bit(l)-1))␊ |
15 | #define bitfield(x,h,l)␉␉(((x) & bitmask(h,l)) >> l)␊ |
16 | ␊ |
17 | #define CPU_STRING_UNKNOWN␉␉"Unknown CPU Type"␊ |
18 | ␊ |
19 | #define MSR_IA32_PLATFORM_ID 0x17␊ |
20 | #define␉MSR_IA32_PERF_STATUS 0x198␊ |
21 | #define MSR_IA32_PERF_CONTROL 0x199␊ |
22 | #define MSR_IA32_EXT_CONFIG 0xEE␊ |
23 | #define MSR_FLEX_RATIO 0x194␊ |
24 | #define MSR_TURBO_RATIO_LIMIT 0x1AD␊ |
25 | #define␉MSR_PLATFORM_INFO 0xCE␊ |
26 | #define MSR_CORE_THREAD_COUNT 0x35␉␉␉// Undocumented␊ |
27 | ␊ |
28 | #define K8_FIDVID_STATUS 0xC0010042␊ |
29 | #define K10_COFVID_STATUS 0xC0010071␊ |
30 | ␊ |
31 | #define MSR_AMD_MPERF 0x000000E7␊ |
32 | #define MSR_AMD_APERF 0x000000E8␊ |
33 | ␊ |
34 | #define DEFAULT_FSB␉␉100000 /* for now, hardcoding 100MHz for old CPUs */␊ |
35 | ␊ |
36 | // DFE: This constant comes from older xnu:␊ |
37 | #define CLKNUM␉␉␉1193182␉␉/* formerly 1193167 */␊ |
38 | ␊ |
39 | // DFE: These two constants come from Linux except CLOCK_TICK_RATE replaced with CLKNUM␊ |
40 | #define CALIBRATE_TIME_MSEC␉30␉␉/* 30 msecs */␊ |
41 | #define CALIBRATE_LATCH␉␉((CLKNUM * CALIBRATE_TIME_MSEC + 1000/2)/1000)␊ |
42 | ␊ |
43 | // CPUID Values␊ |
44 | #define CPUID_MODEL_DOTHAN␉␉13␉// Dothan␊ |
45 | #define CPUID_MODEL_YONAH␉␉14␉// Intel Mobile Core Solo, Duo␊ |
46 | #define CPUID_MODEL_MEROM␉␉15␉// Intel Mobile Core 2 Solo, Duo, Xeon 30xx, Xeon 51xx, Xeon X53xx, Xeon E53xx, Xeon X32xx␊ |
47 | #define CPUID_MODEL_CONROE␉␉15␊ |
48 | #define CPUID_MODEL_CELERON␉␉22␊ |
49 | #define CPUID_MODEL_PENRYN␉␉23␉// Intel Core 2 Solo, Duo, Quad, Extreme, Xeon X54xx, Xeon X33xx␊ |
50 | #define CPUID_MODEL_WOLFDALE␉␉23␊ |
51 | #define CPUID_MODEL_NEHALEM␉␉26␉// Intel Core i7, Xeon W35xx, Xeon X55xx, Xeon E55xx LGA1366 (45nm)␊ |
52 | #define CPUID_MODEL_ATOM␉␉28␉// Intel Atom (45nm)␊ |
53 | #define CPUID_MODEL_XEON_MP␉␉29␊ |
54 | #define CPUID_MODEL_FIELDS␉␉30␉// Intel Core i5, i7, Xeon X34xx LGA1156 (45nm)␊ |
55 | #define CPUID_MODEL_DALES␉␉31␉// Havendale, Auburndale␊ |
56 | #define CPUID_MODEL_DALES_32NM␉␉37␉// Intel Core i3, i5 LGA1156 (32nm)␊ |
57 | #define CPUID_MODEL_SANDYBRIDGE␉␉42␉// Intel Core i3, i5, i7 LGA1155 (32nm)␊ |
58 | #define CPUID_MODEL_WESTMERE␉␉44␉// Intel Core i7, Xeon X56xx, Xeon E56xx, Xeon W36xx LGA1366 (32nm) 6 Core␊ |
59 | #define CPUID_MODEL_JAKETOWN␉␉45␉// Intel Xeon E5 LGA2011 (22nm)␊ |
60 | #define CPUID_MODEL_NEHALEM_EX␉␉46␉// Intel Xeon X75xx, Xeon X65xx, Xeon E75xx, Xeon E65x␊ |
61 | #define CPUID_MODEL_WESTMERE_EX␉␉47␉// Intel Xeon E7␊ |
62 | #define CPUID_MODEL_IVYBRIDGE␉␉58␉// Intel Core i5, i7 LGA1155 (22nm)␊ |
63 | ␊ |
64 | static inline uint64_t rdtsc64(void)␊ |
65 | {␊ |
66 | ␉uint64_t ret;␊ |
67 | ␉__asm__ volatile("rdtsc" : "=A" (ret));␊ |
68 | ␉return ret;␊ |
69 | }␊ |
70 | ␊ |
71 | static inline uint64_t rdmsr64(uint32_t msr)␊ |
72 | {␊ |
73 | uint64_t ret;␊ |
74 | __asm__ volatile("rdmsr" : "=A" (ret) : "c" (msr));␊ |
75 | return ret;␊ |
76 | }␊ |
77 | ␊ |
78 | static inline void wrmsr64(uint32_t msr, uint64_t val)␊ |
79 | {␊ |
80 | ␉__asm__ volatile("wrmsr" : : "c" (msr), "A" (val));␊ |
81 | }␊ |
82 | ␊ |
83 | static inline void intel_waitforsts(void) {␊ |
84 | ␉uint32_t inline_timeout = 100000;␊ |
85 | ␉while (rdmsr64(MSR_IA32_PERF_STATUS) & (1 << 21)) { if (!inline_timeout--) break; }␊ |
86 | }␊ |
87 | ␊ |
88 | static inline void do_cpuid(uint32_t selector, uint32_t *data)␊ |
89 | {␊ |
90 | ␉asm volatile ("cpuid"␊ |
91 | ␉␉␉␉ : "=a" (data[0]),␊ |
92 | ␉␉␉␉ "=b" (data[1]),␊ |
93 | ␉␉␉␉ "=c" (data[2]),␊ |
94 | ␉␉␉␉ "=d" (data[3])␊ |
95 | ␉␉␉␉ : "a" (selector));␊ |
96 | }␊ |
97 | ␊ |
98 | static inline void do_cpuid2(uint32_t selector, uint32_t selector2, uint32_t *data)␊ |
99 | {␊ |
100 | ␉asm volatile ("cpuid"␊ |
101 | ␉␉␉␉ : "=a" (data[0]),␊ |
102 | ␉␉␉␉ "=b" (data[1]),␊ |
103 | ␉␉␉␉ "=c" (data[2]),␊ |
104 | ␉␉␉␉ "=d" (data[3])␊ |
105 | ␉␉␉␉ : "a" (selector), "c" (selector2));␊ |
106 | }␊ |
107 | ␊ |
108 | // DFE: enable_PIT2 and disable_PIT2 come from older xnu␊ |
109 | ␊ |
110 | /*␊ |
111 | * Enable or disable timer 2.␊ |
112 | * Port 0x61 controls timer 2:␊ |
113 | * bit 0 gates the clock,␊ |
114 | * bit 1 gates output to speaker.␊ |
115 | */␊ |
116 | static inline void enable_PIT2(void)␊ |
117 | {␊ |
118 | /* Enable gate, disable speaker */␊ |
119 | __asm__ volatile(␊ |
120 | ␉␉␉␉␉ " inb $0x61,%%al \n\t"␊ |
121 | ␉␉␉␉␉ " and $0xFC,%%al \n\t" /* & ~0x03 */␊ |
122 | ␉␉␉␉␉ " or $1,%%al \n\t"␊ |
123 | ␉␉␉␉␉ " outb %%al,$0x61 \n\t"␊ |
124 | ␉␉␉␉␉ : : : "%al" );␊ |
125 | }␊ |
126 | ␊ |
127 | static inline void disable_PIT2(void)␊ |
128 | {␊ |
129 | /* Disable gate and output to speaker */␊ |
130 | __asm__ volatile(␊ |
131 | ␉␉␉␉␉ " inb $0x61,%%al \n\t"␊ |
132 | ␉␉␉␉␉ " and $0xFC,%%al \n\t"␉/* & ~0x03 */␊ |
133 | ␉␉␉␉␉ " outb %%al,$0x61 \n\t"␊ |
134 | ␉␉␉␉␉ : : : "%al" );␊ |
135 | }␊ |
136 | ␊ |
137 | // DFE: set_PIT2_mode0, poll_PIT2_gate, and measure_tsc_frequency are␊ |
138 | // roughly based on Linux code␊ |
139 | ␊ |
140 | /* Set the 8254 channel 2 to mode 0 with the specified value.␊ |
141 | In mode 0, the counter will initially set its gate low when the␊ |
142 | timer expires. For this to be useful, you ought to set it high␊ |
143 | before calling this function. The enable_PIT2 function does this.␊ |
144 | */␊ |
145 | static inline void set_PIT2_mode0(uint16_t value)␊ |
146 | {␊ |
147 | __asm__ volatile(␊ |
148 | ␉␉␉␉␉ " movb $0xB0,%%al \n\t"␊ |
149 | ␉␉␉␉␉ " outb␉%%al,$0x43␉\n\t"␊ |
150 | ␉␉␉␉␉ " movb␉%%dl,%%al␉\n\t"␊ |
151 | ␉␉␉␉␉ " outb␉%%al,$0x42␉\n\t"␊ |
152 | ␉␉␉␉␉ " movb␉%%dh,%%al␉\n\t"␊ |
153 | ␉␉␉␉␉ " outb␉%%al,$0x42"␊ |
154 | ␉␉␉␉␉ : : "d"(value) /*: no clobber */ );␊ |
155 | }␊ |
156 | ␊ |
157 | /* Returns the number of times the loop ran before the PIT2 signaled */␊ |
158 | static inline unsigned long poll_PIT2_gate(void)␊ |
159 | {␊ |
160 | unsigned long count = 0;␊ |
161 | unsigned char nmi_sc_val;␊ |
162 | do {␊ |
163 | ++count;␊ |
164 | __asm__ volatile(␊ |
165 | ␉␉␉␉␉␉ "inb␉$0x61,%0"␊ |
166 | ␉␉␉␉␉␉ : "=q"(nmi_sc_val) /*:*/ /* no input */ /*:*/ /* no clobber */);␊ |
167 | } while( (nmi_sc_val & 0x20) == 0);␊ |
168 | return count;␊ |
169 | }␊ |
170 | ␊ |
171 | inline static void␊ |
172 | set_PIT2(int value)␊ |
173 | {␊ |
174 | /*␊ |
175 | * First, tell the clock we are going to write 16 bits to the counter␊ |
176 | * and enable one-shot mode (command 0xB8 to port 0x43)␊ |
177 | * Then write the two bytes into the PIT2 clock register (port 0x42).␊ |
178 | * Loop until the value is "realized" in the clock,␊ |
179 | * this happens on the next tick.␊ |
180 | */␊ |
181 | asm volatile(␊ |
182 | " movb $0xB8,%%al \n\t"␊ |
183 | " outb %%al,$0x43 \n\t"␊ |
184 | " movb %%dl,%%al \n\t"␊ |
185 | " outb %%al,$0x42 \n\t"␊ |
186 | " movb %%dh,%%al \n\t"␊ |
187 | " outb %%al,$0x42 \n"␊ |
188 | "1: inb $0x42,%%al \n\t" ␊ |
189 | " inb $0x42,%%al \n\t"␊ |
190 | " cmp %%al,%%dh \n\t"␊ |
191 | " jne 1b"␊ |
192 | : : "d"(value) : "%al");␊ |
193 | }␊ |
194 | ␊ |
195 | ␊ |
196 | inline static uint64_t␊ |
197 | get_PIT2(unsigned int *value)␊ |
198 | {␊ |
199 | register uint64_t result;␊ |
200 | /*␊ |
201 | * This routine first latches the time (command 0x80 to port 0x43),␊ |
202 | * then gets the time stamp so we know how long the read will take later.␊ |
203 | * Read (from port 0x42) and return the current value of the timer.␊ |
204 | */␊ |
205 | #ifdef __i386__␊ |
206 | asm volatile(␊ |
207 | " xorl %%ecx,%%ecx \n\t"␊ |
208 | " movb $0x80,%%al \n\t"␊ |
209 | " outb %%al,$0x43 \n\t"␊ |
210 | " rdtsc \n\t"␊ |
211 | " pushl %%eax \n\t"␊ |
212 | " inb $0x42,%%al \n\t"␊ |
213 | " movb %%al,%%cl \n\t"␊ |
214 | " inb $0x42,%%al \n\t"␊ |
215 | " movb %%al,%%ch \n\t"␊ |
216 | " popl %%eax "␊ |
217 | : "=A"(result), "=c"(*value));␊ |
218 | #else /* __x86_64__ */␊ |
219 | asm volatile(␊ |
220 | ␉␉" xorq %%rcx,%%rcx \n\t"␊ |
221 | ␉␉" movb $0x80,%%al \n\t"␊ |
222 | ␉␉" outb %%al,$0x43 \n\t"␊ |
223 | ␉␉" rdtsc \n\t"␊ |
224 | ␉␉" pushq %%rax \n\t"␊ |
225 | ␉␉" inb $0x42,%%al \n\t"␊ |
226 | ␉␉" movb %%al,%%cl \n\t"␊ |
227 | ␉␉" inb $0x42,%%al \n\t"␊ |
228 | ␉␉" movb %%al,%%ch \n\t"␊ |
229 | ␉␉" popq %%rax "␊ |
230 | ␉␉: "=A"(result), "=c"(*value));␊ |
231 | #endif␊ |
232 | ␊ |
233 | return result;␊ |
234 | }␊ |
235 | ␊ |
236 | #endif /* !__LIBSAIO_CPU_H */␊ |
237 | |