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120 | giacomo | 1 | /* Project: OSLib |
2 | * Description: The OS Construction Kit |
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3 | * Date: 1.6.2000 |
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4 | * Idea by: Luca Abeni & Gerardo Lamastra |
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5 | * |
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6 | * OSLib is an SO project aimed at developing a common, easy-to-use |
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7 | * low-level infrastructure for developing OS kernels and Embedded |
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8 | * Applications; it partially derives from the HARTIK project but it |
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9 | * currently is independently developed. |
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10 | * |
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11 | * OSLib is distributed under GPL License, and some of its code has |
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12 | * been derived from the Linux kernel source; also some important |
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13 | * ideas come from studying the DJGPP go32 extender. |
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14 | * |
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15 | * We acknowledge the Linux Community, Free Software Foundation, |
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16 | * D.J. Delorie and all the other developers who believe in the |
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17 | * freedom of software and ideas. |
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18 | * |
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19 | * For legalese, check out the included GPL license. |
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20 | */ |
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21 | |||
22 | /* Advanced Timer |
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23 | * Date: 8.4.2003 |
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24 | * Author: Giacomo Guidi <giacomo@gandalf.sssup.it> |
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25 | * |
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26 | */ |
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27 | |||
28 | #ifndef __ADVTIMER_H__ |
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29 | #define __ADVTIMER_H__ |
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30 | |||
31 | #include <ll/i386/defs.h> |
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32 | BEGIN_DEF |
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33 | |||
305 | giacomo | 34 | #include <ll/sys/ll/time.h> |
35 | |||
120 | giacomo | 36 | /* TSC */ |
37 | |||
38 | #define rdtsc(low,high) \ |
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648 | mauro | 39 | __asm__ __volatile__("xorl %%eax,%%eax\n\t" \ |
40 | "cpuid\n\t" \ |
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41 | "rdtsc\n\t" \ |
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42 | : "=a" (low), "=d" (high) \ |
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43 | :: "ebx", "ecx") |
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120 | giacomo | 44 | |
45 | #define rdtscll(val) \ |
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648 | mauro | 46 | __asm__ __volatile__("xorl %%eax,%%eax\n\t" \ |
47 | "cpuid\n\t" \ |
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48 | "rdtsc\n\t" \ |
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49 | : "=A" (val) \ |
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50 | :: "ebx","ecx") |
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120 | giacomo | 51 | |
330 | giacomo | 52 | #ifdef __O1000__ |
648 | mauro | 53 | #define ll_read_timespec ll_read_timespec_1000 |
330 | giacomo | 54 | #else |
648 | mauro | 55 | #ifdef __02000__ |
56 | #define ll_read_timespec ll_read_timespec_2000 |
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57 | #else |
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58 | #ifdef __O4000__ |
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59 | #define ll_read_timespec ll_read_timespec_4000 |
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60 | #else |
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61 | #define ll_read_timespec ll_read_timespec_8000 |
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62 | #endif |
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63 | #endif |
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330 | giacomo | 64 | #endif |
65 | |||
66 | //Low level time read function: Optimized for CPU < 1 GHz |
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67 | extern __inline__ void ll_read_timespec_1000(struct timespec *tspec) |
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68 | { |
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652 | mauro | 69 | extern unsigned int clk_opt_1,clk_opt_2; |
70 | extern unsigned long long *ptr_init_tsc; |
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653 | mauro | 71 | extern struct timespec init_time; |
330 | giacomo | 72 | |
652 | mauro | 73 | if (clk_opt_1 == 0) { |
74 | NULL_TIMESPEC(tspec); |
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75 | return; |
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76 | } |
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330 | giacomo | 77 | |
652 | mauro | 78 | __asm__("rdtsc\n\t" |
79 | "subl (%%edi),%%eax\n\t" |
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80 | "sbbl 4(%%edi),%%edx\n\t" |
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81 | "divl %%ebx\n\t" |
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82 | "movl %%eax,%%ebx\n\t" |
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83 | "xorl %%eax,%%eax\n\t" |
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84 | "divl %%ecx\n\t" |
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85 | : "=a" (tspec->tv_nsec), "=b" (tspec->tv_sec) |
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86 | : "D" (ptr_init_tsc) , "b" (clk_opt_1), "c" (clk_opt_2) |
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87 | : "edx" ); |
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88 | |||
89 | if (init_time.tv_sec != 0 || init_time.tv_nsec != 0) { |
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90 | __asm__("divl %%ecx\n\t" |
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91 | "addl %%ebx,%%eax\n\t" |
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92 | :"=a" (tspec->tv_sec), "=d" (tspec->tv_nsec) |
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93 | :"a" (init_time.tv_nsec+tspec->tv_nsec), "b" (tspec->tv_sec+init_time.tv_sec), "c" (1000000000), "d" (0)); |
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94 | }; |
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95 | |||
330 | giacomo | 96 | } |
97 | |||
98 | //Low level time read function: Optimized for CPU < 2 GHz |
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99 | extern __inline__ void ll_read_timespec_2000(struct timespec *tspec) |
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100 | { |
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652 | mauro | 101 | extern unsigned int clk_opt_1,clk_opt_3; |
102 | extern unsigned long long *ptr_init_tsc; |
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653 | mauro | 103 | extern struct timespec init_time; |
330 | giacomo | 104 | |
652 | mauro | 105 | if (clk_opt_1 == 0) { |
106 | NULL_TIMESPEC(tspec); |
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107 | return; |
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108 | } |
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330 | giacomo | 109 | |
652 | mauro | 110 | __asm__("rdtsc\n\t" |
111 | "subl (%%edi),%%eax\n\t" |
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112 | "sbbl 4(%%edi),%%edx\n\t" |
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113 | "divl %%ebx\n\t" |
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114 | "movl %%eax,%%ebx\n\t" |
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115 | "xorl %%eax,%%eax\n\t" |
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116 | "shrdl $1,%%edx,%%eax\n\t" |
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117 | "shrl %%edx\n\t" |
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118 | "divl %%ecx\n\t" |
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119 | : "=a" (tspec->tv_nsec), "=b" (tspec->tv_sec) |
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120 | : "D" (ptr_init_tsc) , "b" (clk_opt_1), "c" (clk_opt_3) |
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121 | : "edx" ); |
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122 | |||
123 | if (init_time.tv_sec != 0 || init_time.tv_nsec != 0) { |
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124 | __asm__("divl %%ecx\n\t" |
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125 | "addl %%ebx,%%eax\n\t" |
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126 | :"=a" (tspec->tv_sec), "=d" (tspec->tv_nsec) |
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127 | :"a" (init_time.tv_nsec+tspec->tv_nsec), "b" (tspec->tv_sec+init_time.tv_sec), "c" (1000000000), "d" (0)); |
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128 | }; |
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129 | |||
330 | giacomo | 130 | } |
131 | |||
132 | //Low level time read function: Optimized for CPU < 4 GHz |
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133 | extern __inline__ void ll_read_timespec_4000(struct timespec *tspec) |
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134 | { |
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652 | mauro | 135 | extern unsigned int clk_opt_1,clk_opt_4; |
136 | extern unsigned long long *ptr_init_tsc; |
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653 | mauro | 137 | extern struct timespec init_time; |
330 | giacomo | 138 | |
652 | mauro | 139 | if (clk_opt_1 == 0) { |
140 | NULL_TIMESPEC(tspec); |
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141 | return; |
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142 | } |
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330 | giacomo | 143 | |
652 | mauro | 144 | __asm__("rdtsc\n\t" |
145 | "subl (%%edi),%%eax\n\t" |
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146 | "sbbl 4(%%edi),%%edx\n\t" |
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147 | "divl %%ebx\n\t" |
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148 | "movl %%eax,%%ebx\n\t" |
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149 | "xorl %%eax,%%eax\n\t" |
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150 | "shrdl $2,%%edx,%%eax\n\t" |
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151 | "shrl $2,%%edx\n\t" |
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152 | "divl %%ecx\n\t" |
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153 | : "=a" (tspec->tv_nsec), "=b" (tspec->tv_sec) |
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154 | : "D" (ptr_init_tsc) , "b" (clk_opt_1), "c" (clk_opt_4) |
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155 | : "edx" ); |
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156 | |||
157 | if (init_time.tv_sec != 0 || init_time.tv_nsec != 0) { |
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158 | __asm__("divl %%ecx\n\t" |
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159 | "addl %%ebx,%%eax\n\t" |
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160 | :"=a" (tspec->tv_sec), "=d" (tspec->tv_nsec) |
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161 | :"a" (init_time.tv_nsec+tspec->tv_nsec), "b" (tspec->tv_sec+init_time.tv_sec), "c" (1000000000), "d" (0)); |
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162 | }; |
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163 | |||
330 | giacomo | 164 | } |
165 | |||
305 | giacomo | 166 | //Low level time read function |
336 | giacomo | 167 | extern __inline__ void ll_read_timespec_8000(struct timespec *tspec) |
305 | giacomo | 168 | { |
648 | mauro | 169 | extern unsigned int clk_opt_0,clk_opt_5; |
170 | extern unsigned long long *ptr_init_tsc; |
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171 | extern struct timespec init_time; |
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172 | |||
173 | if (clk_opt_0 == 0) { |
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174 | NULL_TIMESPEC(tspec); |
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175 | return; |
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176 | } |
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305 | giacomo | 177 | |
648 | mauro | 178 | __asm__("rdtsc\n\t" |
179 | "subl (%%edi),%%eax\n\t" |
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180 | "sbbl 4(%%edi),%%edx\n\t" |
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181 | "shrdl $1,%%edx,%%eax\n\t" |
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182 | "shrl %%edx\n\t" |
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183 | "divl %%ebx\n\t" |
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184 | "movl %%eax,%%ebx\n\t" |
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185 | "xorl %%eax,%%eax\n\t" |
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186 | "shrdl $2,%%edx,%%eax\n\t" |
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187 | "shrl $2,%%edx\n\t" |
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188 | "divl %%ecx\n\t" |
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189 | : "=b" (tspec->tv_sec), "=a" (tspec->tv_nsec) |
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190 | : "D" (ptr_init_tsc), "b" (clk_opt_0), "c" (clk_opt_5) |
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191 | : "edx"); |
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192 | |||
193 | if (init_time.tv_sec != 0 || init_time.tv_nsec != 0) { |
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194 | __asm__("divl %%ecx\n\t" |
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195 | "addl %%ebx,%%eax\n\t" |
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196 | :"=a" (tspec->tv_sec), "=d" (tspec->tv_nsec) |
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652 | mauro | 197 | :"a" (init_time.tv_nsec+tspec->tv_nsec), "b" (tspec->tv_sec+init_time.tv_sec), "c" (1000000000), "d" (0)); |
648 | mauro | 198 | }; |
199 | |||
305 | giacomo | 200 | } |
201 | |||
299 | giacomo | 202 | #define rdmsr(msr,val1,val2) \ |
648 | mauro | 203 | __asm__ __volatile__("rdmsr" \ |
204 | : "=a" (val1), "=d" (val2) \ |
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205 | : "c" (msr)) |
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299 | giacomo | 206 | |
207 | #define wrmsr(msr,val1,val2) \ |
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648 | mauro | 208 | __asm__ __volatile__("wrmsr" \ |
209 | : /* no outputs */ \ |
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210 | : "c" (msr), "a" (val1), "d" (val2)) |
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299 | giacomo | 211 | |
120 | giacomo | 212 | /* RTC */ |
213 | |||
214 | #define RTC_PORT(x) (0x70 + (x)) |
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215 | |||
216 | #define CMOS_READ(addr,val) \ |
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217 | { \ |
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218 | outp(RTC_PORT(0),(addr)); \ |
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219 | val = inp(RTC_PORT(1)); \ |
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220 | } |
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221 | |||
222 | #define CMOS_WRITE(addr,val) \ |
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223 | { \ |
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224 | outp(RTC_PORT(0),(addr)); \ |
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225 | outp(RTC_PORT(1),(val)); \ |
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226 | } |
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227 | |||
228 | #define RTC_IRQ 8 |
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229 | |||
131 | giacomo | 230 | void ll_init_advtimer(void); |
301 | giacomo | 231 | void ll_restore_adv(void); |
646 | mauro | 232 | void ll_scale_advtimer(unsigned int old_f, unsigned int new_f); |
131 | giacomo | 233 | |
120 | giacomo | 234 | END_DEF |
235 | #endif |