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Annotation of prex-old/dev/i386/include/cpu.h, Revision 1.1.1.1

1.1       nbrk        1: /*
                      2:  * Copyright (c) 2005, Kohsuke Ohtani
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms, with or without
                      6:  * modification, are permitted provided that the following conditions
                      7:  * are met:
                      8:  * 1. Redistributions of source code must retain the above copyright
                      9:  *    notice, this list of conditions and the following disclaimer.
                     10:  * 2. Redistributions in binary form must reproduce the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer in the
                     12:  *    documentation and/or other materials provided with the distribution.
                     13:  * 3. Neither the name of the author nor the names of any co-contributors
                     14:  *    may be used to endorse or promote products derived from this software
                     15:  *    without specific prior written permission.
                     16:  *
                     17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
                     18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
                     21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     27:  * SUCH DAMAGE.
                     28:  */
                     29:
                     30: #ifndef _CPU_H
                     31: #define _CPU_H
                     32:
                     33: #include <sys/cdefs.h>
                     34: #include <sys/types.h>
                     35:
                     36: #define BREAKPOINT() __asm__ ("int $3"::)
                     37:
                     38: /*
                     39:  * I/O instructions
                     40:  */
                     41: static __inline void
                     42: outb(unsigned char value, int port)
                     43: {
                     44:        __asm__ __volatile__(
                     45:                "outb %b0, %w1"
                     46:                ::"a" (value),"Nd" (port));
                     47: }
                     48:
                     49: static __inline void
                     50: outw(unsigned short value, int port)
                     51: {
                     52:        __asm__ __volatile__(
                     53:                "outw %w0, %w1"
                     54:                ::"a" (value),"Nd" (port));
                     55: }
                     56:
                     57: static __inline void
                     58: outl(unsigned long value, int port)
                     59: {
                     60:        __asm__ __volatile__(
                     61:                "outl %0, %w1"
                     62:                ::"a" (value),"Nd" (port));
                     63: }
                     64:
                     65: static __inline unsigned char
                     66: inb(int port)
                     67: {
                     68:        unsigned char _val;
                     69:        __asm__ __volatile__(
                     70:                "inb %w1, %b0"
                     71:                :"=a" (_val)
                     72:                :"Nd" (port));
                     73:        return _val;
                     74: }
                     75:
                     76: static __inline unsigned short
                     77: inw(int port)
                     78: {
                     79:        unsigned char _val;
                     80:        __asm__ __volatile__(
                     81:                "inw %w1, %w0"
                     82:                :"=a" (_val)
                     83:                :"Nd" (port));
                     84:        return _val;
                     85: }
                     86:
                     87: static __inline unsigned long
                     88: inl(int port)
                     89: {
                     90:        unsigned char _val;
                     91:        __asm__ __volatile__(
                     92:                "inl %w1, %0"
                     93:                :"=a" (_val)
                     94:                :"Nd" (port));
                     95:        return _val;
                     96: }
                     97:
                     98: static __inline void
                     99: outb_p(unsigned char value, int port)
                    100: {
                    101:        __asm__ __volatile__(
                    102:                "outb %b0, %w1\n\t"
                    103:                "outb %%al, $0x80\n\t"
                    104:                ::"a" (value),"Nd" (port));
                    105: }
                    106:
                    107: static __inline unsigned char
                    108: inb_p(int port)
                    109: {
                    110:        unsigned char _val;
                    111:        __asm__ __volatile__(
                    112:                "inb %w1, %b0\n\t"
                    113:                "outb %%al, $0x80\n\t"
                    114:                :"=a" (_val)
                    115:                :"Nd" (port));
                    116:        return _val;
                    117: }
                    118:
                    119:
                    120: /*
                    121:  * Macro to read/write the machine specific register (MSR)
                    122:  */
                    123: #define rdmsr(msr,val1,val2) \
                    124:        __asm__ __volatile__("rdmsr" \
                    125:                          : "=a" (val1), "=d" (val2) \
                    126:                          : "c" (msr))
                    127:
                    128: #define wrmsr(msr,val1,val2) \
                    129:        __asm__ __volatile__("wrmsr" \
                    130:                          : /* no outputs */ \
                    131:                          : "c" (msr), "a" (val1), "d" (val2))
                    132:
                    133: /*
                    134:  * Get cpu id
                    135:  */
                    136: static __inline void
                    137: cpuid(u_int eax, u_int *p)
                    138: {
                    139:        __asm__ __volatile__(
                    140:                "cpuid\n\t"
                    141:                "movl %%eax, 0(%2)\n\t"
                    142:                "movl %%ebx, 4(%2)\n\t"
                    143:                "movl %%ecx, 8(%2)\n\t"
                    144:                "movl %%edx, 12(%2)\n\t"
                    145:                : "=a" (eax)
                    146:                : "0" (eax), "S" (p)
                    147:                : "bx", "cx", "dx");
                    148: }
                    149:
                    150: #endif /* !_CPU_H */