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75 lines
1.6 KiB
ArmAsm
75 lines
1.6 KiB
ArmAsm
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/*
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* Copyright (C) 2011 Texas Instruments Incorporated
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* Author: Mark Salter (msalter@redhat.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/linkage.h>
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#include <asm/asm-offsets.h>
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#define SP B15
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/*
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* void __switch_to(struct thread_info *prev,
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* struct thread_info *next,
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* struct task_struct *tsk) ;
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*/
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ENTRY(__switch_to)
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LDDW .D2T2 *+B4(THREAD_B15_14),B7:B6
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|| MV .L2X A4,B5 ; prev
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|| MV .L1X B4,A5 ; next
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|| MVC .S2 RILC,B1
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STW .D2T2 B3,*+B5(THREAD_PC)
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|| STDW .D1T1 A13:A12,*+A4(THREAD_A13_12)
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|| MVC .S2 ILC,B0
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LDW .D2T2 *+B4(THREAD_PC),B3
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|| LDDW .D1T1 *+A5(THREAD_A13_12),A13:A12
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STDW .D1T1 A11:A10,*+A4(THREAD_A11_10)
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|| STDW .D2T2 B1:B0,*+B5(THREAD_RICL_ICL)
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#ifndef __DSBT__
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|| MVKL .S2 current_ksp,B1
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#endif
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STDW .D2T2 B15:B14,*+B5(THREAD_B15_14)
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|| STDW .D1T1 A15:A14,*+A4(THREAD_A15_14)
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#ifndef __DSBT__
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|| MVKH .S2 current_ksp,B1
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#endif
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;; Switch to next SP
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MV .S2 B7,SP
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#ifdef __DSBT__
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|| STW .D2T2 B7,*+B14(current_ksp)
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#else
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|| STW .D2T2 B7,*B1
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|| MV .L2 B6,B14
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#endif
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|| LDDW .D1T1 *+A5(THREAD_RICL_ICL),A1:A0
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STDW .D2T2 B11:B10,*+B5(THREAD_B11_10)
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|| LDDW .D1T1 *+A5(THREAD_A15_14),A15:A14
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STDW .D2T2 B13:B12,*+B5(THREAD_B13_12)
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|| LDDW .D1T1 *+A5(THREAD_A11_10),A11:A10
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B .S2 B3 ; return in next E1
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|| LDDW .D2T2 *+B4(THREAD_B13_12),B13:B12
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LDDW .D2T2 *+B4(THREAD_B11_10),B11:B10
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NOP
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MV .L2X A0,B0
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|| MV .S1 A6,A4
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MVC .S2 B0,ILC
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|| MV .L2X A1,B1
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MVC .S2 B1,RILC
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ENDPROC(__switch_to)
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