| Aurelien Jacquiot | 687b12b | 2011-10-04 11:03:44 -0400 | [diff] [blame] | 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) |