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5c5ce192 RM |
1 | /* |
2 | * The PCI Library -- Access to i386 I/O ports on DJGPP | |
3 | * | |
4 | * Copyright (c) 2010, 2017 Rudolf Marek <r.marek@assembler.cz> | |
5 | * | |
6 | * Can be freely distributed and used under the terms of the GNU GPL. | |
7 | */ | |
8 | ||
9 | #include <pc.h> | |
10 | #include <dos.h> | |
11 | #define outb(x,y) outportb(y, x) | |
12 | #define outw(x,y) outportw(y, x) | |
13 | #define outl(x,y) outportl(y, x) | |
14 | ||
15 | #define inb inportb | |
16 | #define inw inportw | |
17 | #define inl inportl | |
18 | ||
19 | static int irq_enabled; | |
20 | ||
21 | static int | |
22 | intel_setup_io(struct pci_access *a UNUSED) | |
23 | { | |
24 | return 1; | |
25 | } | |
26 | ||
27 | static inline int | |
28 | intel_cleanup_io(struct pci_access *a UNUSED) | |
29 | { | |
30 | return 1; | |
31 | } | |
32 | ||
33 | static inline void intel_io_lock(void) | |
34 | { | |
35 | asm volatile("" : : : "memory"); | |
36 | irq_enabled = disable(); | |
37 | } | |
38 | ||
39 | static inline void intel_io_unlock(void) | |
40 | { | |
41 | asm volatile("" : : : "memory"); | |
42 | if (irq_enabled) { | |
43 | enable(); | |
44 | } | |
45 | } |