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view src/asmops.h @ 80:4db99a52863e

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fixed the "endianess" of the text messages in the ATA identify info block. this is the first time I've seen wrong byteorder in ascii text, the ATA committee should be commended.
author John Tsiombikas <nuclear@member.fsf.org>
date Tue, 06 Dec 2011 13:35:39 +0200
parents 5f6c5751ae05
children
line source
1 #ifndef ASMOPS_H_
2 #define ASMOPS_H_
3
4 #include <inttypes.h>
5
6 /* general purpose registers as they are pushed by pusha */
7 struct registers {
8 uint32_t edi, esi, ebp, esp;
9 uint32_t ebx, edx, ecx, eax;
10 } __attribute__ ((packed));
11
12 #define enable_intr() asm volatile("sti")
13 #define disable_intr() asm volatile("cli")
14 #define halt_cpu() asm volatile("hlt")
15
16 #define push_regs() asm volatile("pusha");
17 #define pop_regs() asm volatile("popa");
18
19 #define inb(dest, port) asm volatile( \
20 "inb %1, %0\n\t" \
21 : "=a" ((unsigned char)(dest)) \
22 : "dN" ((unsigned short)(port)))
23
24 #define inw(dest, port) asm volatile( \
25 "inw %1, %0\n\t" \
26 : "=a" ((unsigned short)(dest)) \
27 : "dN" ((unsigned short)(port)))
28
29 #define inl(dest, port) asm volatile( \
30 "inl %1, %0\n\t" \
31 : "=a" ((unsigned long)(dest)) \
32 : "dN" ((unsigned short)(port)))
33
34 #define outb(src, port) asm volatile( \
35 "outb %0, %1\n\t" \
36 :: "a" ((unsigned char)(src)), "dN" ((unsigned short)(port)))
37
38 #define outw(src, port) asm volatile( \
39 "outw %0, %1\n\t" \
40 :: "a" ((unsigned short)(src)), "dN" ((unsigned short)(port)))
41
42 #define outl(src, port) asm volatile( \
43 "outl %0, %1\n\t" \
44 :: "a" ((unsigned long)(src)), "dN" ((unsigned short)(port)))
45
46 #define iodelay() outb(0, 0x80)
47
48
49 #endif /* ASMOPS_H_ */