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1 | /* |
2 | * Copyright (C) 2011 Texas Instruments Incorporated | |
3 | * Author: Mark Salter (msalter@redhat.com) | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
8 | */ | |
9 | ||
10 | #include <linux/linkage.h> | |
11 | #include <asm/asm-offsets.h> | |
12 | ||
13 | #define SP B15 | |
14 | ||
15 | /* | |
16 | * void __switch_to(struct thread_info *prev, | |
17 | * struct thread_info *next, | |
18 | * struct task_struct *tsk) ; | |
19 | */ | |
20 | ENTRY(__switch_to) | |
21 | LDDW .D2T2 *+B4(THREAD_B15_14),B7:B6 | |
22 | || MV .L2X A4,B5 ; prev | |
23 | || MV .L1X B4,A5 ; next | |
24 | || MVC .S2 RILC,B1 | |
25 | ||
26 | STW .D2T2 B3,*+B5(THREAD_PC) | |
27 | || STDW .D1T1 A13:A12,*+A4(THREAD_A13_12) | |
28 | || MVC .S2 ILC,B0 | |
29 | ||
30 | LDW .D2T2 *+B4(THREAD_PC),B3 | |
31 | || LDDW .D1T1 *+A5(THREAD_A13_12),A13:A12 | |
32 | ||
33 | STDW .D1T1 A11:A10,*+A4(THREAD_A11_10) | |
34 | || STDW .D2T2 B1:B0,*+B5(THREAD_RICL_ICL) | |
35 | #ifndef __DSBT__ | |
36 | || MVKL .S2 current_ksp,B1 | |
37 | #endif | |
38 | ||
39 | STDW .D2T2 B15:B14,*+B5(THREAD_B15_14) | |
40 | || STDW .D1T1 A15:A14,*+A4(THREAD_A15_14) | |
41 | #ifndef __DSBT__ | |
42 | || MVKH .S2 current_ksp,B1 | |
43 | #endif | |
44 | ||
45 | ;; Switch to next SP | |
46 | MV .S2 B7,SP | |
47 | #ifdef __DSBT__ | |
48 | || STW .D2T2 B7,*+B14(current_ksp) | |
49 | #else | |
50 | || STW .D2T2 B7,*B1 | |
51 | || MV .L2 B6,B14 | |
52 | #endif | |
53 | || LDDW .D1T1 *+A5(THREAD_RICL_ICL),A1:A0 | |
54 | ||
55 | STDW .D2T2 B11:B10,*+B5(THREAD_B11_10) | |
56 | || LDDW .D1T1 *+A5(THREAD_A15_14),A15:A14 | |
57 | ||
58 | STDW .D2T2 B13:B12,*+B5(THREAD_B13_12) | |
59 | || LDDW .D1T1 *+A5(THREAD_A11_10),A11:A10 | |
60 | ||
61 | B .S2 B3 ; return in next E1 | |
62 | || LDDW .D2T2 *+B4(THREAD_B13_12),B13:B12 | |
63 | ||
64 | LDDW .D2T2 *+B4(THREAD_B11_10),B11:B10 | |
65 | NOP | |
66 | ||
67 | MV .L2X A0,B0 | |
68 | || MV .S1 A6,A4 | |
69 | ||
70 | MVC .S2 B0,ILC | |
71 | || MV .L2X A1,B1 | |
72 | ||
73 | MVC .S2 B1,RILC | |
74 | ENDPROC(__switch_to) |