1/*
2 * Copyright (c) 2003 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#include <sys/appleapiopts.h>
30#include <ppc/asm.h>					// EXT, LEXT
31#include <machine/cpu_capabilities.h>
32#include <machine/commpage.h>
33
34        .text
35        .align	2
36
37#define	USER_SPRG3	259		// user-mode-readable encoding for SPRG3
38
39
40// ***********************************************************
41// * P T H R E A D _ G E T S P E C I F I C _ S P R G 3 _ 3 2 *
42// ***********************************************************
43//
44// For processors with user-readable SPRG3, in 32-bit mode.   Called with:
45//		r3 = word number
46//		r4 = offset to thread specific data (_PTHREAD_TSD_OFFSET)
47
48pthread_getspecific_sprg3_32:
49        slwi	r5,r3,2				// convert word# to byte offset
50        mfspr	r3,USER_SPRG3		// get per-thread cookie
51        add		r5,r5,r4			// add in offset to first word
52        lwzx	r3,r3,r5			// get the thread-specific word
53        blr
54
55    COMMPAGE_DESCRIPTOR(pthread_getspecific_sprg3_32,_COMM_PAGE_PTHREAD_GETSPECIFIC,k64Bit,0,kCommPage32)
56
57
58// ***********************************************************
59// * P T H R E A D _ G E T S P E C I F I C _ S P R G 3 _ 6 4 *
60// ***********************************************************
61//
62// For processors with user-readable SPRG3, in 64-bit mode.  This may not be used
63// because the 64-bit ABI uses r13 for the thread-local-data pointer.  Called with:
64//		r3 = word number
65//		r4 = offset to thread specific data (_PTHREAD_TSD_OFFSET)
66
67pthread_getspecific_sprg3_64:
68        sldi	r5,r3,3				// convert double-word# to byte offset
69        mfspr	r3,USER_SPRG3		// get per-thread cookie
70        add		r5,r5,r4			// add in offset to first word
71        ldx		r3,r3,r5			// get the thread-specific doubleword
72        blr
73
74    COMMPAGE_DESCRIPTOR(pthread_getspecific_sprg3_64,_COMM_PAGE_PTHREAD_GETSPECIFIC,k64Bit,0,kCommPage64)
75
76
77// ***************************************
78// * P T H R E A D _ S E L F _ S P R G 3 *
79// ***************************************
80//
81// For processors with user-readable SPRG3.  Useable both in 32 and 64-bit modes.
82
83pthread_self_sprg3:
84        mfspr	r3,USER_SPRG3		// get per-thread cookie
85        blr
86
87    COMMPAGE_DESCRIPTOR(pthread_self_sprg3,_COMM_PAGE_PTHREAD_SELF,k64Bit,0,kCommPageBoth)
88
89
90// *******************************************************
91// * P T H R E A D _ G E T S P E C I F I C _ U F T R A P *
92// *******************************************************
93//
94// For processors that use the Ultra-Fast-Trap to get the thread-specific ptr.
95// Called with:
96//		r3 = word number
97//		r4 = offset to thread specific data (_PTHREAD_TSD_OFFSET)
98
99pthread_getspecific_uftrap:
100        slwi	r5,r3,2				// convert word# to byte offset
101        li 		r0,0x7FF2			// magic "pthread_self" ultra-fast trap code
102        sc
103        add		r5,r5,r4			// add in offset to first word
104        lwzx	r3,r3,r5			// get the thread-specific word
105        blr
106
107    COMMPAGE_DESCRIPTOR(pthread_getspecific_uftrap,_COMM_PAGE_PTHREAD_GETSPECIFIC,0,k64Bit,kCommPage32)
108
109
110// *****************************************
111// * P T H R E A D _ S E L F _ U F T R A P *
112// *****************************************
113//
114// For processors that use the Ultra-Fast-Trap to get the thread-specific ptr.
115
116pthread_self_uftrap:
117        li 		r0,0x7FF2			// magic "pthread_self" ultra-fast trap code
118        sc							// get r3==TLDP
119        blr
120
121    COMMPAGE_DESCRIPTOR(pthread_self_uftrap,_COMM_PAGE_PTHREAD_SELF,0,k64Bit,kCommPage32)
122