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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [score/] [cpu/] [powerpc/] [new_exception_processing/] [cpu_asm.S] - Blame information for rev 173

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/*  cpu_asm.s   1.1 - 95/12/04
 *
 *  This file contains the assembly code for the PowerPC implementation
 *  of RTEMS.
 *
 *  Author:     Andrew Bray 
 *
 *  COPYRIGHT (c) 1995 by i-cubed ltd.
 *
 *  To anyone who acknowledges that this file is provided "AS IS"
 *  without any express or implied warranty:
 *      permission to use, copy, modify, and distribute this file
 *      for any purpose is hereby granted without fee, provided that
 *      the above copyright notice and this notice appears in all
 *      copies, and that the name of i-cubed limited not be used in
 *      advertising or publicity pertaining to distribution of the
 *      software without specific, written prior permission.
 *      i-cubed limited makes no representations about the suitability
 *      of this software for any purpose.
 *
 *  Derived from c/src/exec/cpu/no_cpu/cpu_asm.c:
 *
 *  COPYRIGHT (c) 1989-1997.
 *  On-Line Applications Research Corporation (OAR).
 *  Copyright assigned to U.S. Government, 1994.
 *
 *  The license and distribution terms for this file may in
 *  the file LICENSE in this distribution or at
 *  http://www.OARcorp.com/rtems/license.html.
 *
 *  $Id: cpu_asm.S,v 1.2 2001-09-27 11:59:29 chris Exp $
 */
 
#include 
 
/*
 * Offsets for various Contexts
 */
        .set    GP_1, 0
        .set    GP_2, (GP_1 + 4)
        .set    GP_13, (GP_2 + 4)
        .set    GP_14, (GP_13 + 4)
 
        .set    GP_15, (GP_14 + 4)
        .set    GP_16, (GP_15 + 4)
        .set    GP_17, (GP_16 + 4)
        .set    GP_18, (GP_17 + 4)
 
        .set    GP_19, (GP_18 + 4)
        .set    GP_20, (GP_19 + 4)
        .set    GP_21, (GP_20 + 4)
        .set    GP_22, (GP_21 + 4)
 
        .set    GP_23, (GP_22 + 4)
        .set    GP_24, (GP_23 + 4)
        .set    GP_25, (GP_24 + 4)
        .set    GP_26, (GP_25 + 4)
 
        .set    GP_27, (GP_26 + 4)
        .set    GP_28, (GP_27 + 4)
        .set    GP_29, (GP_28 + 4)
        .set    GP_30, (GP_29 + 4)
 
        .set    GP_31, (GP_30 + 4)
        .set    GP_CR, (GP_31 + 4)
        .set    GP_PC, (GP_CR + 4)
        .set    GP_MSR, (GP_PC + 4)
 
        .set    FP_0, 0
        .set    FP_1, (FP_0 + 4)
        .set    FP_2, (FP_1 + 4)
        .set    FP_3, (FP_2 + 4)
        .set    FP_4, (FP_3 + 4)
        .set    FP_5, (FP_4 + 4)
        .set    FP_6, (FP_5 + 4)
        .set    FP_7, (FP_6 + 4)
        .set    FP_8, (FP_7 + 4)
        .set    FP_9, (FP_8 + 4)
        .set    FP_10, (FP_9 + 4)
        .set    FP_11, (FP_10 + 4)
        .set    FP_12, (FP_11 + 4)
        .set    FP_13, (FP_12 + 4)
        .set    FP_14, (FP_13 + 4)
        .set    FP_15, (FP_14 + 4)
        .set    FP_16, (FP_15 + 4)
        .set    FP_17, (FP_16 + 4)
        .set    FP_18, (FP_17 + 4)
        .set    FP_19, (FP_18 + 4)
        .set    FP_20, (FP_19 + 4)
        .set    FP_21, (FP_20 + 4)
        .set    FP_22, (FP_21 + 4)
        .set    FP_23, (FP_22 + 4)
        .set    FP_24, (FP_23 + 4)
        .set    FP_25, (FP_24 + 4)
        .set    FP_26, (FP_25 + 4)
        .set    FP_27, (FP_26 + 4)
        .set    FP_28, (FP_27 + 4)
        .set    FP_29, (FP_28 + 4)
        .set    FP_30, (FP_29 + 4)
        .set    FP_31, (FP_30 + 4)
        .set    FP_FPSCR, (FP_31 + 4)
 
        .set    IP_LINK, 0
        .set    IP_0, (IP_LINK + 8)
        .set    IP_2, (IP_0 + 4)
 
        .set    IP_3, (IP_2 + 4)
        .set    IP_4, (IP_3 + 4)
        .set    IP_5, (IP_4 + 4)
        .set    IP_6, (IP_5 + 4)
 
        .set    IP_7, (IP_6 + 4)
        .set    IP_8, (IP_7 + 4)
        .set    IP_9, (IP_8 + 4)
        .set    IP_10, (IP_9 + 4)
 
        .set    IP_11, (IP_10 + 4)
        .set    IP_12, (IP_11 + 4)
        .set    IP_13, (IP_12 + 4)
        .set    IP_28, (IP_13 + 4)
 
        .set    IP_29, (IP_28 + 4)
        .set    IP_30, (IP_29 + 4)
        .set    IP_31, (IP_30 + 4)
        .set    IP_CR, (IP_31 + 4)
 
        .set    IP_CTR, (IP_CR + 4)
        .set    IP_XER, (IP_CTR + 4)
        .set    IP_LR, (IP_XER + 4)
        .set    IP_PC, (IP_LR + 4)
 
        .set    IP_MSR, (IP_PC + 4)
        .set    IP_END, (IP_MSR + 16)
 
        BEGIN_CODE
/*
 *  _CPU_Context_save_fp_context
 *
 *  This routine is responsible for saving the FP context
 *  at *fp_context_ptr.  If the point to load the FP context
 *  from is changed then the pointer is modified by this routine.
 *
 *  Sometimes a macro implementation of this is in cpu.h which dereferences
 *  the ** and a similarly named routine in this file is passed something
 *  like a (Context_Control_fp *).  The general rule on making this decision
 *  is to avoid writing assembly language.
 */
 
        ALIGN (PPC_CACHE_ALIGNMENT, PPC_CACHE_ALIGN_POWER)
        PUBLIC_PROC (_CPU_Context_save_fp)
PROC (_CPU_Context_save_fp):
#if (PPC_HAS_FPU == 1)
        lwz     r3, 0(r3)
        stfs    f0, FP_0(r3)
        stfs    f1, FP_1(r3)
        stfs    f2, FP_2(r3)
        stfs    f3, FP_3(r3)
        stfs    f4, FP_4(r3)
        stfs    f5, FP_5(r3)
        stfs    f6, FP_6(r3)
        stfs    f7, FP_7(r3)
        stfs    f8, FP_8(r3)
        stfs    f9, FP_9(r3)
        stfs    f10, FP_10(r3)
        stfs    f11, FP_11(r3)
        stfs    f12, FP_12(r3)
        stfs    f13, FP_13(r3)
        stfs    f14, FP_14(r3)
        stfs    f15, FP_15(r3)
        stfs    f16, FP_16(r3)
        stfs    f17, FP_17(r3)
        stfs    f18, FP_18(r3)
        stfs    f19, FP_19(r3)
        stfs    f20, FP_20(r3)
        stfs    f21, FP_21(r3)
        stfs    f22, FP_22(r3)
        stfs    f23, FP_23(r3)
        stfs    f24, FP_24(r3)
        stfs    f25, FP_25(r3)
        stfs    f26, FP_26(r3)
        stfs    f27, FP_27(r3)
        stfs    f28, FP_28(r3)
        stfs    f29, FP_29(r3)
        stfs    f30, FP_30(r3)
        stfs    f31, FP_31(r3)
        mffs    f2
        stfs    f2, FP_FPSCR(r3)
#endif
        blr
 
/*
 *  _CPU_Context_restore_fp_context
 *
 *  This routine is responsible for restoring the FP context
 *  at *fp_context_ptr.  If the point to load the FP context
 *  from is changed then the pointer is modified by this routine.
 *
 *  Sometimes a macro implementation of this is in cpu.h which dereferences
 *  the ** and a similarly named routine in this file is passed something
 *  like a (Context_Control_fp *).  The general rule on making this decision
 *  is to avoid writing assembly language.
 */
 
        ALIGN (PPC_CACHE_ALIGNMENT, PPC_CACHE_ALIGN_POWER)
        PUBLIC_PROC (_CPU_Context_restore_fp)
PROC (_CPU_Context_restore_fp):
#if (PPC_HAS_FPU == 1)
        lwz     r3, 0(r3)
        lfs     f2, FP_FPSCR(r3)
        mtfsf   255, f2
        lfs     f0, FP_0(r3)
        lfs     f1, FP_1(r3)
        lfs     f2, FP_2(r3)
        lfs     f3, FP_3(r3)
        lfs     f4, FP_4(r3)
        lfs     f5, FP_5(r3)
        lfs     f6, FP_6(r3)
        lfs     f7, FP_7(r3)
        lfs     f8, FP_8(r3)
        lfs     f9, FP_9(r3)
        lfs     f10, FP_10(r3)
        lfs     f11, FP_11(r3)
        lfs     f12, FP_12(r3)
        lfs     f13, FP_13(r3)
        lfs     f14, FP_14(r3)
        lfs     f15, FP_15(r3)
        lfs     f16, FP_16(r3)
        lfs     f17, FP_17(r3)
        lfs     f18, FP_18(r3)
        lfs     f19, FP_19(r3)
        lfs     f20, FP_20(r3)
        lfs     f21, FP_21(r3)
        lfs     f22, FP_22(r3)
        lfs     f23, FP_23(r3)
        lfs     f24, FP_24(r3)
        lfs     f25, FP_25(r3)
        lfs     f26, FP_26(r3)
        lfs     f27, FP_27(r3)
        lfs     f28, FP_28(r3)
        lfs     f29, FP_29(r3)
        lfs     f30, FP_30(r3)
        lfs     f31, FP_31(r3)
#endif
        blr
 
 
/*  _CPU_Context_switch
 *
 *  This routine performs a normal non-FP context switch.
 */
        ALIGN (PPC_CACHE_ALIGNMENT, PPC_CACHE_ALIGN_POWER)
        PUBLIC_PROC (_CPU_Context_switch)
PROC (_CPU_Context_switch):
        sync
        isync
        /* This assumes that all the registers are in the given order */
        li      r5, 32
        addi    r3,r3,-4
#if ( PPC_USE_DATA_CACHE )
        dcbz    r5, r3
#endif
        stw     r1, GP_1+4(r3)
        stw     r2, GP_2+4(r3)
#if (PPC_USE_MULTIPLE == 1)
        addi    r3, r3, GP_18+4
#if ( PPC_USE_DATA_CACHE )
        dcbz    r5, r3
#endif
        stmw    r13, GP_13-GP_18(r3)
#else
        stw     r13, GP_13+4(r3)
        stw     r14, GP_14+4(r3)
        stw     r15, GP_15+4(r3)
        stw     r16, GP_16+4(r3)
        stw     r17, GP_17+4(r3)
        stwu    r18, GP_18+4(r3)
#if ( PPC_USE_DATA_CACHE )
        dcbz    r5, r3
#endif
        stw     r19, GP_19-GP_18(r3)
        stw     r20, GP_20-GP_18(r3)
        stw     r21, GP_21-GP_18(r3)
        stw     r22, GP_22-GP_18(r3)
        stw     r23, GP_23-GP_18(r3)
        stw     r24, GP_24-GP_18(r3)
        stw     r25, GP_25-GP_18(r3)
        stw     r26, GP_26-GP_18(r3)
        stw     r27, GP_27-GP_18(r3)
        stw     r28, GP_28-GP_18(r3)
        stw     r29, GP_29-GP_18(r3)
        stw     r30, GP_30-GP_18(r3)
        stw     r31, GP_31-GP_18(r3)
#endif
#if ( PPC_USE_DATA_CACHE )
        dcbt    r0, r4
#endif
        mfcr    r6
        stw     r6, GP_CR-GP_18(r3)
        mflr    r7
        stw     r7, GP_PC-GP_18(r3)
        mfmsr   r8
        stw     r8, GP_MSR-GP_18(r3)
 
#if ( PPC_USE_DATA_CACHE )
        dcbt    r5, r4
#endif
        lwz     r1, GP_1(r4)
        lwz     r2, GP_2(r4)
#if (PPC_USE_MULTIPLE == 1)
        addi    r4, r4, GP_19
#if ( PPC_USE_DATA_CACHE )
        dcbt    r5, r4
#endif
        lmw     r13, GP_13-GP_19(r4)
#else
        lwz     r13, GP_13(r4)
        lwz     r14, GP_14(r4)
        lwz     r15, GP_15(r4)
        lwz     r16, GP_16(r4)
        lwz     r17, GP_17(r4)
        lwz     r18, GP_18(r4)
        lwzu    r19, GP_19(r4)
#if ( PPC_USE_DATA_CACHE )
        dcbt    r5, r4
#endif
        lwz     r20, GP_20-GP_19(r4)
        lwz     r21, GP_21-GP_19(r4)
        lwz     r22, GP_22-GP_19(r4)
        lwz     r23, GP_23-GP_19(r4)
        lwz     r24, GP_24-GP_19(r4)
        lwz     r25, GP_25-GP_19(r4)
        lwz     r26, GP_26-GP_19(r4)
        lwz     r27, GP_27-GP_19(r4)
        lwz     r28, GP_28-GP_19(r4)
        lwz     r29, GP_29-GP_19(r4)
        lwz     r30, GP_30-GP_19(r4)
        lwz     r31, GP_31-GP_19(r4)
#endif
        lwz     r6, GP_CR-GP_19(r4)
        lwz     r7, GP_PC-GP_19(r4)
        lwz     r8, GP_MSR-GP_19(r4)
        mtcrf   255, r6
        mtlr    r7
        mtmsr   r8
 
        blr
 
/*
 *  _CPU_Context_restore
 *
 *  This routine is generallu used only to restart self in an
 *  efficient manner.  It may simply be a label in _CPU_Context_switch.
 *
 *  NOTE: May be unnecessary to reload some registers.
 */
/*
 * ACB: Don't worry about cache optimisation here - this is not THAT critical.
 */
        ALIGN (PPC_CACHE_ALIGNMENT, PPC_CACHE_ALIGN_POWER)
        PUBLIC_PROC (_CPU_Context_restore)
PROC (_CPU_Context_restore):
        lwz     r5, GP_CR(r3)
        lwz     r6, GP_PC(r3)
        lwz     r7, GP_MSR(r3)
        mtcrf   255, r5
        mtlr    r6
        mtmsr   r7
        lwz     r1, GP_1(r3)
        lwz     r2, GP_2(r3)
#if (PPC_USE_MULTIPLE == 1)
        lmw     r13, GP_13(r3)
#else
        lwz     r13, GP_13(r3)
        lwz     r14, GP_14(r3)
        lwz     r15, GP_15(r3)
        lwz     r16, GP_16(r3)
        lwz     r17, GP_17(r3)
        lwz     r18, GP_18(r3)
        lwz     r19, GP_19(r3)
        lwz     r20, GP_20(r3)
        lwz     r21, GP_21(r3)
        lwz     r22, GP_22(r3)
        lwz     r23, GP_23(r3)
        lwz     r24, GP_24(r3)
        lwz     r25, GP_25(r3)
        lwz     r26, GP_26(r3)
        lwz     r27, GP_27(r3)
        lwz     r28, GP_28(r3)
        lwz     r29, GP_29(r3)
        lwz     r30, GP_30(r3)
        lwz     r31, GP_31(r3)
#endif
 
        blr
 

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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [score/] [cpu/] [powerpc/] [new_exception_processing/] [cpu_asm.S] - Blame information for rev 173

Line No.	Rev	Author	Line
1	30	unneback
2			`/* cpu_asm.s 1.1 - 95/12/04`
3			`*`
4			`* This file contains the assembly code for the PowerPC implementation`
5			`* of RTEMS.`
6			`*`
7			`* Author: Andrew Bray`
8			`*`
9			`* COPYRIGHT (c) 1995 by i-cubed ltd.`
10			`*`
11			`* To anyone who acknowledges that this file is provided "AS IS"`
12			`* without any express or implied warranty:`
13			`* permission to use, copy, modify, and distribute this file`
14			`* for any purpose is hereby granted without fee, provided that`
15			`* the above copyright notice and this notice appears in all`
16			`* copies, and that the name of i-cubed limited not be used in`
17			`* advertising or publicity pertaining to distribution of the`
18			`* software without specific, written prior permission.`
19			`* i-cubed limited makes no representations about the suitability`
20			`* of this software for any purpose.`
21			`*`
22			`* Derived from c/src/exec/cpu/no_cpu/cpu_asm.c:`
23			`*`
24			`* COPYRIGHT (c) 1989-1997.`
25			`* On-Line Applications Research Corporation (OAR).`
26			`* Copyright assigned to U.S. Government, 1994.`
27			`*`
28			`* The license and distribution terms for this file may in`
29			`* the file LICENSE in this distribution or at`
30			`* http://www.OARcorp.com/rtems/license.html.`
31			`*`
32			`* $Id: cpu_asm.S,v 1.2 2001-09-27 11:59:29 chris Exp $`
33			`*/`
34
35			`#include`
36
37			`/*`
38			`* Offsets for various Contexts`
39			`*/`
40			`.set GP_1, 0`
41			`.set GP_2, (GP_1 + 4)`
42			`.set GP_13, (GP_2 + 4)`
43			`.set GP_14, (GP_13 + 4)`
44
45			`.set GP_15, (GP_14 + 4)`
46			`.set GP_16, (GP_15 + 4)`
47			`.set GP_17, (GP_16 + 4)`
48			`.set GP_18, (GP_17 + 4)`
49
50			`.set GP_19, (GP_18 + 4)`
51			`.set GP_20, (GP_19 + 4)`
52			`.set GP_21, (GP_20 + 4)`
53			`.set GP_22, (GP_21 + 4)`
54
55			`.set GP_23, (GP_22 + 4)`
56			`.set GP_24, (GP_23 + 4)`
57			`.set GP_25, (GP_24 + 4)`
58			`.set GP_26, (GP_25 + 4)`
59
60			`.set GP_27, (GP_26 + 4)`
61			`.set GP_28, (GP_27 + 4)`
62			`.set GP_29, (GP_28 + 4)`
63			`.set GP_30, (GP_29 + 4)`
64
65			`.set GP_31, (GP_30 + 4)`
66			`.set GP_CR, (GP_31 + 4)`
67			`.set GP_PC, (GP_CR + 4)`
68			`.set GP_MSR, (GP_PC + 4)`
69
70			`.set FP_0, 0`
71			`.set FP_1, (FP_0 + 4)`
72			`.set FP_2, (FP_1 + 4)`
73			`.set FP_3, (FP_2 + 4)`
74			`.set FP_4, (FP_3 + 4)`
75			`.set FP_5, (FP_4 + 4)`
76			`.set FP_6, (FP_5 + 4)`
77			`.set FP_7, (FP_6 + 4)`
78			`.set FP_8, (FP_7 + 4)`
79			`.set FP_9, (FP_8 + 4)`
80			`.set FP_10, (FP_9 + 4)`
81			`.set FP_11, (FP_10 + 4)`
82			`.set FP_12, (FP_11 + 4)`
83			`.set FP_13, (FP_12 + 4)`
84			`.set FP_14, (FP_13 + 4)`
85			`.set FP_15, (FP_14 + 4)`
86			`.set FP_16, (FP_15 + 4)`
87			`.set FP_17, (FP_16 + 4)`
88			`.set FP_18, (FP_17 + 4)`
89			`.set FP_19, (FP_18 + 4)`
90			`.set FP_20, (FP_19 + 4)`
91			`.set FP_21, (FP_20 + 4)`
92			`.set FP_22, (FP_21 + 4)`
93			`.set FP_23, (FP_22 + 4)`
94			`.set FP_24, (FP_23 + 4)`
95			`.set FP_25, (FP_24 + 4)`
96			`.set FP_26, (FP_25 + 4)`
97			`.set FP_27, (FP_26 + 4)`
98			`.set FP_28, (FP_27 + 4)`
99			`.set FP_29, (FP_28 + 4)`
100			`.set FP_30, (FP_29 + 4)`
101			`.set FP_31, (FP_30 + 4)`
102			`.set FP_FPSCR, (FP_31 + 4)`
103
104			`.set IP_LINK, 0`
105			`.set IP_0, (IP_LINK + 8)`
106			`.set IP_2, (IP_0 + 4)`
107
108			`.set IP_3, (IP_2 + 4)`
109			`.set IP_4, (IP_3 + 4)`
110			`.set IP_5, (IP_4 + 4)`
111			`.set IP_6, (IP_5 + 4)`
112
113			`.set IP_7, (IP_6 + 4)`
114			`.set IP_8, (IP_7 + 4)`
115			`.set IP_9, (IP_8 + 4)`
116			`.set IP_10, (IP_9 + 4)`
117
118			`.set IP_11, (IP_10 + 4)`
119			`.set IP_12, (IP_11 + 4)`
120			`.set IP_13, (IP_12 + 4)`
121			`.set IP_28, (IP_13 + 4)`
122
123			`.set IP_29, (IP_28 + 4)`
124			`.set IP_30, (IP_29 + 4)`
125			`.set IP_31, (IP_30 + 4)`
126			`.set IP_CR, (IP_31 + 4)`
127
128			`.set IP_CTR, (IP_CR + 4)`
129			`.set IP_XER, (IP_CTR + 4)`
130			`.set IP_LR, (IP_XER + 4)`
131			`.set IP_PC, (IP_LR + 4)`
132
133			`.set IP_MSR, (IP_PC + 4)`
134			`.set IP_END, (IP_MSR + 16)`
135
136			`BEGIN_CODE`
137			`/*`
138			`* _CPU_Context_save_fp_context`
139			`*`
140			`* This routine is responsible for saving the FP context`
141			`* at *fp_context_ptr. If the point to load the FP context`
142			`* from is changed then the pointer is modified by this routine.`
143			`*`
144			`* Sometimes a macro implementation of this is in cpu.h which dereferences`
145			`* the ** and a similarly named routine in this file is passed something`
146			`* like a (Context_Control_fp *). The general rule on making this decision`
147			`* is to avoid writing assembly language.`
148			`*/`
149
150			`ALIGN (PPC_CACHE_ALIGNMENT, PPC_CACHE_ALIGN_POWER)`
151			`PUBLIC_PROC (_CPU_Context_save_fp)`
152			`PROC (_CPU_Context_save_fp):`
153			`#if (PPC_HAS_FPU == 1)`
154			`lwz r3, 0(r3)`
155			`stfs f0, FP_0(r3)`
156			`stfs f1, FP_1(r3)`
157			`stfs f2, FP_2(r3)`
158			`stfs f3, FP_3(r3)`
159			`stfs f4, FP_4(r3)`
160			`stfs f5, FP_5(r3)`
161			`stfs f6, FP_6(r3)`
162			`stfs f7, FP_7(r3)`
163			`stfs f8, FP_8(r3)`
164			`stfs f9, FP_9(r3)`
165			`stfs f10, FP_10(r3)`
166			`stfs f11, FP_11(r3)`
167			`stfs f12, FP_12(r3)`
168			`stfs f13, FP_13(r3)`
169			`stfs f14, FP_14(r3)`
170			`stfs f15, FP_15(r3)`
171			`stfs f16, FP_16(r3)`
172			`stfs f17, FP_17(r3)`
173			`stfs f18, FP_18(r3)`
174			`stfs f19, FP_19(r3)`
175			`stfs f20, FP_20(r3)`
176			`stfs f21, FP_21(r3)`
177			`stfs f22, FP_22(r3)`
178			`stfs f23, FP_23(r3)`
179			`stfs f24, FP_24(r3)`
180			`stfs f25, FP_25(r3)`
181			`stfs f26, FP_26(r3)`
182			`stfs f27, FP_27(r3)`
183			`stfs f28, FP_28(r3)`
184			`stfs f29, FP_29(r3)`
185			`stfs f30, FP_30(r3)`
186			`stfs f31, FP_31(r3)`
187			`mffs f2`
188			`stfs f2, FP_FPSCR(r3)`
189			`#endif`
190			`blr`
191
192			`/*`
193			`* _CPU_Context_restore_fp_context`
194			`*`
195			`* This routine is responsible for restoring the FP context`
196			`* at *fp_context_ptr. If the point to load the FP context`
197			`* from is changed then the pointer is modified by this routine.`
198			`*`
199			`* Sometimes a macro implementation of this is in cpu.h which dereferences`
200			`* the ** and a similarly named routine in this file is passed something`
201			`* like a (Context_Control_fp *). The general rule on making this decision`
202			`* is to avoid writing assembly language.`
203			`*/`
204
205			`ALIGN (PPC_CACHE_ALIGNMENT, PPC_CACHE_ALIGN_POWER)`
206			`PUBLIC_PROC (_CPU_Context_restore_fp)`
207			`PROC (_CPU_Context_restore_fp):`
208			`#if (PPC_HAS_FPU == 1)`
209			`lwz r3, 0(r3)`
210			`lfs f2, FP_FPSCR(r3)`
211			`mtfsf 255, f2`
212			`lfs f0, FP_0(r3)`
213			`lfs f1, FP_1(r3)`
214			`lfs f2, FP_2(r3)`
215			`lfs f3, FP_3(r3)`
216			`lfs f4, FP_4(r3)`
217			`lfs f5, FP_5(r3)`
218			`lfs f6, FP_6(r3)`
219			`lfs f7, FP_7(r3)`
220			`lfs f8, FP_8(r3)`
221			`lfs f9, FP_9(r3)`
222			`lfs f10, FP_10(r3)`
223			`lfs f11, FP_11(r3)`
224			`lfs f12, FP_12(r3)`
225			`lfs f13, FP_13(r3)`
226			`lfs f14, FP_14(r3)`
227			`lfs f15, FP_15(r3)`
228			`lfs f16, FP_16(r3)`
229			`lfs f17, FP_17(r3)`
230			`lfs f18, FP_18(r3)`
231			`lfs f19, FP_19(r3)`
232			`lfs f20, FP_20(r3)`
233			`lfs f21, FP_21(r3)`
234			`lfs f22, FP_22(r3)`
235			`lfs f23, FP_23(r3)`
236			`lfs f24, FP_24(r3)`
237			`lfs f25, FP_25(r3)`
238			`lfs f26, FP_26(r3)`
239			`lfs f27, FP_27(r3)`
240			`lfs f28, FP_28(r3)`
241			`lfs f29, FP_29(r3)`
242			`lfs f30, FP_30(r3)`
243			`lfs f31, FP_31(r3)`
244			`#endif`
245			`blr`
246
247
248			`/* _CPU_Context_switch`
249			`*`
250			`* This routine performs a normal non-FP context switch.`
251			`*/`
252			`ALIGN (PPC_CACHE_ALIGNMENT, PPC_CACHE_ALIGN_POWER)`
253			`PUBLIC_PROC (_CPU_Context_switch)`
254			`PROC (_CPU_Context_switch):`
255			`sync`
256			`isync`
257			`/* This assumes that all the registers are in the given order */`
258			`li r5, 32`
259			`addi r3,r3,-4`
260			`#if ( PPC_USE_DATA_CACHE )`
261			`dcbz r5, r3`
262			`#endif`
263			`stw r1, GP_1+4(r3)`
264			`stw r2, GP_2+4(r3)`
265			`#if (PPC_USE_MULTIPLE == 1)`
266			`addi r3, r3, GP_18+4`
267			`#if ( PPC_USE_DATA_CACHE )`
268			`dcbz r5, r3`
269			`#endif`
270			`stmw r13, GP_13-GP_18(r3)`
271			`#else`
272			`stw r13, GP_13+4(r3)`
273			`stw r14, GP_14+4(r3)`
274			`stw r15, GP_15+4(r3)`
275			`stw r16, GP_16+4(r3)`
276			`stw r17, GP_17+4(r3)`
277			`stwu r18, GP_18+4(r3)`
278			`#if ( PPC_USE_DATA_CACHE )`
279			`dcbz r5, r3`
280			`#endif`
281			`stw r19, GP_19-GP_18(r3)`
282			`stw r20, GP_20-GP_18(r3)`
283			`stw r21, GP_21-GP_18(r3)`
284			`stw r22, GP_22-GP_18(r3)`
285			`stw r23, GP_23-GP_18(r3)`
286			`stw r24, GP_24-GP_18(r3)`
287			`stw r25, GP_25-GP_18(r3)`
288			`stw r26, GP_26-GP_18(r3)`
289			`stw r27, GP_27-GP_18(r3)`
290			`stw r28, GP_28-GP_18(r3)`
291			`stw r29, GP_29-GP_18(r3)`
292			`stw r30, GP_30-GP_18(r3)`
293			`stw r31, GP_31-GP_18(r3)`
294			`#endif`
295			`#if ( PPC_USE_DATA_CACHE )`
296			`dcbt r0, r4`
297			`#endif`
298			`mfcr r6`
299			`stw r6, GP_CR-GP_18(r3)`
300			`mflr r7`
301			`stw r7, GP_PC-GP_18(r3)`
302			`mfmsr r8`
303			`stw r8, GP_MSR-GP_18(r3)`
304
305			`#if ( PPC_USE_DATA_CACHE )`
306			`dcbt r5, r4`
307			`#endif`
308			`lwz r1, GP_1(r4)`
309			`lwz r2, GP_2(r4)`
310			`#if (PPC_USE_MULTIPLE == 1)`
311			`addi r4, r4, GP_19`
312			`#if ( PPC_USE_DATA_CACHE )`
313			`dcbt r5, r4`
314			`#endif`
315			`lmw r13, GP_13-GP_19(r4)`
316			`#else`
317			`lwz r13, GP_13(r4)`
318			`lwz r14, GP_14(r4)`
319			`lwz r15, GP_15(r4)`
320			`lwz r16, GP_16(r4)`
321			`lwz r17, GP_17(r4)`
322			`lwz r18, GP_18(r4)`
323			`lwzu r19, GP_19(r4)`
324			`#if ( PPC_USE_DATA_CACHE )`
325			`dcbt r5, r4`
326			`#endif`
327			`lwz r20, GP_20-GP_19(r4)`
328			`lwz r21, GP_21-GP_19(r4)`
329			`lwz r22, GP_22-GP_19(r4)`
330			`lwz r23, GP_23-GP_19(r4)`
331			`lwz r24, GP_24-GP_19(r4)`
332			`lwz r25, GP_25-GP_19(r4)`
333			`lwz r26, GP_26-GP_19(r4)`
334			`lwz r27, GP_27-GP_19(r4)`
335			`lwz r28, GP_28-GP_19(r4)`
336			`lwz r29, GP_29-GP_19(r4)`
337			`lwz r30, GP_30-GP_19(r4)`
338			`lwz r31, GP_31-GP_19(r4)`
339			`#endif`
340			`lwz r6, GP_CR-GP_19(r4)`
341			`lwz r7, GP_PC-GP_19(r4)`
342			`lwz r8, GP_MSR-GP_19(r4)`
343			`mtcrf 255, r6`
344			`mtlr r7`
345			`mtmsr r8`
346
347			`blr`
348
349			`/*`
350			`* _CPU_Context_restore`
351			`*`
352			`* This routine is generallu used only to restart self in an`
353			`* efficient manner. It may simply be a label in _CPU_Context_switch.`
354			`*`
355			`* NOTE: May be unnecessary to reload some registers.`
356			`*/`
357			`/*`
358			`* ACB: Don't worry about cache optimisation here - this is not THAT critical.`
359			`*/`
360			`ALIGN (PPC_CACHE_ALIGNMENT, PPC_CACHE_ALIGN_POWER)`
361			`PUBLIC_PROC (_CPU_Context_restore)`
362			`PROC (_CPU_Context_restore):`
363			`lwz r5, GP_CR(r3)`
364			`lwz r6, GP_PC(r3)`
365			`lwz r7, GP_MSR(r3)`
366			`mtcrf 255, r5`
367			`mtlr r6`
368			`mtmsr r7`
369			`lwz r1, GP_1(r3)`
370			`lwz r2, GP_2(r3)`
371			`#if (PPC_USE_MULTIPLE == 1)`
372			`lmw r13, GP_13(r3)`
373			`#else`
374			`lwz r13, GP_13(r3)`
375			`lwz r14, GP_14(r3)`
376			`lwz r15, GP_15(r3)`
377			`lwz r16, GP_16(r3)`
378			`lwz r17, GP_17(r3)`
379			`lwz r18, GP_18(r3)`
380			`lwz r19, GP_19(r3)`
381			`lwz r20, GP_20(r3)`
382			`lwz r21, GP_21(r3)`
383			`lwz r22, GP_22(r3)`
384			`lwz r23, GP_23(r3)`
385			`lwz r24, GP_24(r3)`
386			`lwz r25, GP_25(r3)`
387			`lwz r26, GP_26(r3)`
388			`lwz r27, GP_27(r3)`
389			`lwz r28, GP_28(r3)`
390			`lwz r29, GP_29(r3)`
391			`lwz r30, GP_30(r3)`
392			`lwz r31, GP_31(r3)`
393			`#endif`
394
395			`blr`
396