xref: /reactos/ntoskrnl/ex/i386/ioport.S (revision 8a978a17) 
1/*
2 * COPYRIGHT:       See COPYING in the top level directory
3 * PROJECT:         ReactOS kernel
4 * FILE:            ntoskrnl/ex/i386/ioport.S
5 * PURPOSE:         FASTCALL Interlocked Functions
6 * PROGRAMMERS:     Alex Ionescu (alex@relsoft.net)
7 */
8
9/* INCLUDES ******************************************************************/
10
11#include <asm.inc>
12#include <ks386.inc>
13
14/* GLOBALS *******************************************************************/
15
16PUBLIC _READ_REGISTER_UCHAR@4
17PUBLIC _READ_REGISTER_USHORT@4
18PUBLIC _READ_REGISTER_ULONG@4
19PUBLIC _READ_REGISTER_BUFFER_UCHAR@12
20PUBLIC _READ_REGISTER_BUFFER_USHORT@12
21PUBLIC _READ_REGISTER_BUFFER_ULONG@12
22PUBLIC _WRITE_REGISTER_UCHAR@8
23PUBLIC _WRITE_REGISTER_USHORT@8
24PUBLIC _WRITE_REGISTER_ULONG@8
25PUBLIC _WRITE_REGISTER_BUFFER_UCHAR@12
26PUBLIC _WRITE_REGISTER_BUFFER_USHORT@12
27PUBLIC _WRITE_REGISTER_BUFFER_ULONG@12
28
29/* FUNCTIONS *****************************************************************/
30
31.code
32
33_READ_REGISTER_UCHAR@4:
34
35    /* Return the requested memory location */
36    mov edx, [esp+4]
37    mov al, [edx]
38    ret 4
39
40
41_READ_REGISTER_USHORT@4:
42
43    /* Return the requested memory location */
44    mov edx, [esp+4]
45    mov ax, [edx]
46    ret 4
47
48
49_READ_REGISTER_ULONG@4:
50
51    /* Return the requested memory location */
52    mov edx, [esp+4]
53    mov eax, [edx]
54    ret 4
55
56
57_READ_REGISTER_BUFFER_UCHAR@12:
58
59    /* Save volatiles */
60    mov eax, esi
61    mov edx, edi
62
63    /* Do the transfer */
64    mov ecx, [esp+12]
65    mov esi, [esp+4]
66    mov edi, [esp+8]
67    rep movsb
68
69    /* Restore volatiles and return */
70    mov edi, edx
71    mov esi, eax
72    ret 12
73
74
75_READ_REGISTER_BUFFER_USHORT@12:
76
77    /* Save volatiles */
78    mov eax, esi
79    mov edx, edi
80
81    /* Do the transfer */
82    mov ecx, [esp+12]
83    mov esi, [esp+4]
84    mov edi, [esp+8]
85    rep movsw
86
87    /* Restore volatiles and return */
88    mov edi, edx
89    mov esi, eax
90    ret 12
91
92
93_READ_REGISTER_BUFFER_ULONG@12:
94
95    /* Save volatiles */
96    mov eax, esi
97    mov edx, edi
98
99    /* Do the transfer */
100    mov ecx, [esp+12]
101    mov esi, [esp+4]
102    mov edi, [esp+8]
103    rep movsd
104
105    /* Restore volatiles and return */
106    mov edi, edx
107    mov esi, eax
108    ret 12
109
110
111_WRITE_REGISTER_UCHAR@8:
112
113    /* Write to memory */
114    mov edx, [esp+4]
115    mov al, [esp+8]
116    mov [edx], al
117
118    /* Flush posted write buffers and return */
119    lock or [esp+4], edx
120    ret 8
121
122
123_WRITE_REGISTER_USHORT@8:
124
125    /* Write to memory */
126    mov edx, [esp+4]
127    mov eax, [esp+8]
128    mov [edx], ax
129
130    /* Flush posted write buffers and return */
131    lock or [esp+4], edx
132    ret 8
133
134
135_WRITE_REGISTER_ULONG@8:
136
137    /* Write to memory */
138    mov edx, [esp+4]
139    mov eax, [esp+8]
140    mov [edx], eax
141
142    /* Flush posted write buffers and return */
143    lock or [esp+4], edx
144    ret 8
145
146
147_WRITE_REGISTER_BUFFER_UCHAR@12:
148
149    /* Save volatiles */
150    mov eax, esi
151    mov edx, edi
152
153    /* Do the transfer */
154    mov ecx, [esp+12]
155    mov esi, [esp+8]
156    mov edi, [esp+4]
157    rep movsb
158
159    /* Flush posted write buffers */
160    lock or [esp+4], ecx
161
162    /* Restore volatiles and return */
163    mov edi, edx
164    mov esi, eax
165    ret 12
166
167
168_WRITE_REGISTER_BUFFER_USHORT@12:
169
170    /* Save volatiles */
171    mov eax, esi
172    mov edx, edi
173
174    /* Do the transfer */
175    mov ecx, [esp+12]
176    mov esi, [esp+8]
177    mov edi, [esp+4]
178    rep movsw
179
180    /* Flush posted write buffers */
181    lock or [esp+4], ecx
182
183    /* Restore volatiles and return */
184    mov edi, edx
185    mov esi, eax
186    ret 12
187
188
189_WRITE_REGISTER_BUFFER_ULONG@12:
190
191    /* Save volatiles */
192    mov eax, esi
193    mov edx, edi
194
195    /* Do the transfer */
196    mov ecx, [esp+12]
197    mov esi, [esp+8]
198    mov edi, [esp+4]
199    rep movsd
200
201    /* Flush posted write buffers */
202    lock or [esp+4], ecx
203
204    /* Restore volatiles and return */
205    mov edi, edx
206    mov esi, eax
207    ret 12
208
209END
210/* EOF */
211