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Source at commit 1084 created 13 years 1 month ago. By meklort, BiosDisk Read() function working. Write() complete but untested | |
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1 | /*␊ |
2 | * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.␊ |
3 | *␊ |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@␊ |
5 | * ␊ |
6 | * This file contains Original Code and/or Modifications of Original Code␊ |
7 | * as defined in and that are subject to the Apple Public Source License␊ |
8 | * Version 2.0 (the 'License'). You may not use this file except in␊ |
9 | * compliance with the License. The rights granted to you under the License␊ |
10 | * may not be used to create, or enable the creation or redistribution of,␊ |
11 | * unlawful or unlicensed copies of an Apple operating system, or to␊ |
12 | * circumvent, violate, or enable the circumvention or violation of, any␊ |
13 | * terms of an Apple operating system software license agreement.␊ |
14 | * ␊ |
15 | * Please obtain a copy of the License at␊ |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file.␊ |
17 | * ␊ |
18 | * The Original Code and all software distributed under the License are␊ |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.␊ |
23 | * Please see the License for the specific language governing rights and␊ |
24 | * limitations under the License.␊ |
25 | * ␊ |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@␊ |
27 | */␊ |
28 | ␊ |
29 | #ifndef _OS_OSBYTEORDERPPC_H␊ |
30 | #define _OS_OSBYTEORDERPPC_H␊ |
31 | ␊ |
32 | #include <stdint.h>␊ |
33 | ␊ |
34 | #if !defined(OS_INLINE)␊ |
35 | # if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L␊ |
36 | # define OS_INLINE static inline␊ |
37 | # elif defined(__MWERKS__) || defined(__cplusplus)␊ |
38 | # define OS_INLINE static inline␊ |
39 | # else␊ |
40 | # define OS_INLINE static __inline__␊ |
41 | # endif␊ |
42 | #endif␊ |
43 | ␊ |
44 | /* Functions for byte reversed loads. */␊ |
45 | ␊ |
46 | OS_INLINE␊ |
47 | uint16_t␊ |
48 | OSReadSwapInt16(␊ |
49 | const volatile void * base,␊ |
50 | uintptr_t byteOffset␊ |
51 | )␊ |
52 | {␊ |
53 | uint16_t result;␊ |
54 | volatile uint16_t *addr = (volatile uint16_t *)((uintptr_t)base + byteOffset);␊ |
55 | ␊ |
56 | #if defined(__llvm__)␊ |
57 | result = *addr;␊ |
58 | result = ((result << 8) | (result >> 8));␊ |
59 | #else␊ |
60 | __asm__ ("lhbrx %0, %2, %1"␊ |
61 | : "=r" (result)␊ |
62 | : "r" (base), "bO" (byteOffset), "m" (*addr));␊ |
63 | #endif␊ |
64 | ␊ |
65 | return result;␊ |
66 | }␊ |
67 | ␊ |
68 | OS_INLINE␊ |
69 | uint32_t␊ |
70 | OSReadSwapInt32(␊ |
71 | const volatile void * base,␊ |
72 | uintptr_t byteOffset␊ |
73 | )␊ |
74 | {␊ |
75 | uint32_t result;␊ |
76 | volatile uint32_t *addr = (volatile uint32_t *)((uintptr_t)base + byteOffset);␊ |
77 | ␊ |
78 | #if defined(__llvm__)␊ |
79 | result = __builtin_bswap32(*addr);␊ |
80 | #else␊ |
81 | __asm__ ("lwbrx %0, %2, %1"␊ |
82 | : "=r" (result)␊ |
83 | : "r" (base), "bO" (byteOffset), "m" (*addr));␊ |
84 | #endif␊ |
85 | ␊ |
86 | return result;␊ |
87 | }␊ |
88 | ␊ |
89 | OS_INLINE␊ |
90 | uint64_t␊ |
91 | OSReadSwapInt64(␊ |
92 | const volatile void * base,␊ |
93 | uintptr_t byteOffset␊ |
94 | )␊ |
95 | {␊ |
96 | volatile uint64_t *addr = (volatile uint64_t *)((uintptr_t)base + byteOffset);␊ |
97 | union {␊ |
98 | uint64_t u64;␊ |
99 | uint32_t u32[2];␊ |
100 | } u;␊ |
101 | ␊ |
102 | #if defined(__llvm__)␊ |
103 | u.u64 = __builtin_bswap64(*addr);␊ |
104 | #else␊ |
105 | __asm__ ("lwbrx %0, %3, %2\n\t"␊ |
106 | "lwbrx %1, %4, %2"␊ |
107 | : "=&r" (u.u32[1]), "=r" (u.u32[0])␊ |
108 | : "r" (base), "bO" (byteOffset), "b" (byteOffset + 4), "m" (*addr));␊ |
109 | #endif␊ |
110 | ␊ |
111 | return u.u64;␊ |
112 | }␊ |
113 | ␊ |
114 | /* Functions for byte reversed stores. */␊ |
115 | ␊ |
116 | OS_INLINE␊ |
117 | void␊ |
118 | OSWriteSwapInt16(␊ |
119 | volatile void * base,␊ |
120 | uintptr_t byteOffset,␊ |
121 | uint16_t data␊ |
122 | )␊ |
123 | {␊ |
124 | volatile uint16_t *addr = (volatile uint16_t *)((uintptr_t)base + byteOffset);␊ |
125 | ␊ |
126 | #if defined(__llvm__)␊ |
127 | *addr = ((data >> 8) | (data << 8));␊ |
128 | #else␊ |
129 | __asm__ ("sthbrx %1, %3, %2"␊ |
130 | : "=m" (*addr)␊ |
131 | : "r" (data), "r" (base), "bO" (byteOffset));␊ |
132 | #endif␊ |
133 | }␊ |
134 | ␊ |
135 | OS_INLINE␊ |
136 | void␊ |
137 | OSWriteSwapInt32(␊ |
138 | volatile void * base,␊ |
139 | uintptr_t byteOffset,␊ |
140 | uint32_t data␊ |
141 | )␊ |
142 | {␊ |
143 | volatile uint32_t *addr = (volatile uint32_t *)((uintptr_t)base + byteOffset);␊ |
144 | ␊ |
145 | #if defined(__llvm__)␊ |
146 | *addr = __builtin_bswap32(data);␊ |
147 | #else␊ |
148 | __asm__ ("stwbrx %1, %3, %2"␊ |
149 | : "=m" (*addr)␊ |
150 | : "r" (data), "r" (base), "bO" (byteOffset));␊ |
151 | #endif␊ |
152 | }␊ |
153 | ␊ |
154 | OS_INLINE␊ |
155 | void␊ |
156 | OSWriteSwapInt64(␊ |
157 | volatile void * base,␊ |
158 | uintptr_t byteOffset,␊ |
159 | uint64_t data␊ |
160 | )␊ |
161 | {␊ |
162 | volatile uint64_t *addr = (volatile uint64_t *)((uintptr_t)base + byteOffset);␊ |
163 | ␊ |
164 | #if defined(__llvm__)␊ |
165 | *addr = __builtin_bswap64(data);␊ |
166 | #else␊ |
167 | uint32_t hi = (uint32_t)(data >> 32);␊ |
168 | uint32_t lo = (uint32_t)(data & 0xffffffff);␊ |
169 | ␊ |
170 | __asm__ ("stwbrx %1, %4, %3\n\t"␊ |
171 | "stwbrx %2, %5, %3"␊ |
172 | : "=m" (*addr)␊ |
173 | : "r" (lo), "r" (hi), "r" (base), "bO" (byteOffset), "b" (byteOffset + 4));␊ |
174 | #endif␊ |
175 | }␊ |
176 | ␊ |
177 | /* Generic byte swapping functions. */␊ |
178 | ␊ |
179 | OS_INLINE␊ |
180 | uint16_t␊ |
181 | _OSSwapInt16(␊ |
182 | uint16_t data␊ |
183 | )␊ |
184 | {␊ |
185 | return OSReadSwapInt16(&data, 0);␊ |
186 | }␊ |
187 | ␊ |
188 | OS_INLINE␊ |
189 | uint32_t␊ |
190 | _OSSwapInt32(␊ |
191 | uint32_t data␊ |
192 | )␊ |
193 | {␊ |
194 | return OSReadSwapInt32(&data, 0);␊ |
195 | }␊ |
196 | ␊ |
197 | OS_INLINE␊ |
198 | uint64_t␊ |
199 | _OSSwapInt64(␊ |
200 | uint64_t data␊ |
201 | )␊ |
202 | {␊ |
203 | return OSReadSwapInt64(&data, 0);␊ |
204 | }␊ |
205 | ␊ |
206 | #endif /* ! _OS_OSBYTEORDERPPC_H */␊ |
207 |