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786 |
skrzyp |
// #===========================================================================
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// #
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// # context.S
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// #
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// # FUJITSU context switch code
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// #
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// #===========================================================================
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// ####ECOSGPLCOPYRIGHTBEGIN####
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// -------------------------------------------
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// This file is part of eCos, the Embedded Configurable Operating System.
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// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2004 Free Software Foundation, Inc.
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//
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// eCos is free software; you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free
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// Software Foundation; either version 2 or (at your option) any later
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// version.
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//
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// eCos is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with eCos; if not, write to the Free Software Foundation, Inc.,
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// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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// As a special exception, if other files instantiate templates or use
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// macros or inline functions from this file, or you compile this file
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// and link it with other works to produce a work based on this file,
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// this file does not by itself cause the resulting work to be covered by
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// the GNU General Public License. However the source code for this file
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// must still be made available in accordance with section (3) of the GNU
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// General Public License v2.
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//
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// This exception does not invalidate any other reasons why a work based
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// on this file might be covered by the GNU General Public License.
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// -------------------------------------------
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// ####ECOSGPLCOPYRIGHTEND####
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// #===========================================================================
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// ######DESCRIPTIONBEGIN####
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// #
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// # Author(s): nickg, gthomas
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// # Contributors: nickg, gthomas
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// # Date: 1998-09-15
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// # Purpose: FUJITSU context switch code
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// # Description: This file contains implementations of the thread context
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// # switch routines. It also contains the longjmp() and setjmp()
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// # routines.
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// #
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// #####DESCRIPTIONEND####
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// #
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// #===========================================================================
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#include
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#include "frv.inc"
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.text
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// ----------------------------------------------------------------------------
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// hal_thread_switch_context(new, old)
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// Switch thread contexts
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// new = address of context of next thread to execute
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// old = address of context save location of current thread
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// thread state is saved on the current stack
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.globl hal_thread_switch_context
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hal_thread_switch_context:
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subi sp,_TS_size,sp // Space for saved frame
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sti gr2,@(sp,_TS_GPR2) // Save registers
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sti gr3,@(sp,_TS_GPR3)
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sti gr4,@(sp,_TS_GPR4)
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sti gr5,@(sp,_TS_GPR5)
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sti gr6,@(sp,_TS_GPR6)
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sti gr7,@(sp,_TS_GPR7)
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sti gr8,@(sp,_TS_GPR8)
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sti gr9,@(sp,_TS_GPR9)
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sti gr10,@(sp,_TS_GPR10)
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sti gr11,@(sp,_TS_GPR11)
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sti gr12,@(sp,_TS_GPR12)
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sti gr13,@(sp,_TS_GPR13)
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sti gr14,@(sp,_TS_GPR14)
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sti gr15,@(sp,_TS_GPR15)
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sti gr16,@(sp,_TS_GPR16)
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sti gr17,@(sp,_TS_GPR17)
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sti gr18,@(sp,_TS_GPR18)
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sti gr19,@(sp,_TS_GPR19)
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sti gr20,@(sp,_TS_GPR20)
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sti gr21,@(sp,_TS_GPR21)
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sti gr22,@(sp,_TS_GPR22)
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sti gr23,@(sp,_TS_GPR23)
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sti gr24,@(sp,_TS_GPR24)
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sti gr25,@(sp,_TS_GPR25)
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sti gr26,@(sp,_TS_GPR26)
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sti gr27,@(sp,_TS_GPR27)
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sti gr28,@(sp,_TS_GPR28)
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sti gr29,@(sp,_TS_GPR29)
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sti gr30,@(sp,_TS_GPR30)
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sti gr31,@(sp,_TS_GPR31)
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#if _NGPR != 32
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#ifdef CYGINT_HAL_FRV_ARCH_FR400
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movsg HSR0,gr5
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srli gr5,#10,gr5
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andicc gr5,#1,gr0,icc0
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bne icc0,0,1f
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#endif
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sti gr32,@(sp,_TS_GPR32)
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sti gr33,@(sp,_TS_GPR33)
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sti gr34,@(sp,_TS_GPR34)
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sti gr35,@(sp,_TS_GPR35)
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sti gr36,@(sp,_TS_GPR36)
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sti gr37,@(sp,_TS_GPR37)
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sti gr38,@(sp,_TS_GPR38)
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sti gr39,@(sp,_TS_GPR39)
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sti gr40,@(sp,_TS_GPR40)
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sti gr41,@(sp,_TS_GPR41)
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sti gr42,@(sp,_TS_GPR42)
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sti gr43,@(sp,_TS_GPR43)
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sti gr44,@(sp,_TS_GPR44)
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sti gr45,@(sp,_TS_GPR45)
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sti gr46,@(sp,_TS_GPR46)
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sti gr47,@(sp,_TS_GPR47)
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sti gr48,@(sp,_TS_GPR48)
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sti gr49,@(sp,_TS_GPR49)
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sti gr50,@(sp,_TS_GPR50)
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sti gr51,@(sp,_TS_GPR51)
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sti gr52,@(sp,_TS_GPR52)
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sti gr53,@(sp,_TS_GPR53)
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sti gr54,@(sp,_TS_GPR54)
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sti gr55,@(sp,_TS_GPR55)
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sti gr56,@(sp,_TS_GPR56)
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sti gr57,@(sp,_TS_GPR57)
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sti gr58,@(sp,_TS_GPR58)
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sti gr59,@(sp,_TS_GPR59)
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sti gr60,@(sp,_TS_GPR60)
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sti gr61,@(sp,_TS_GPR61)
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sti gr62,@(sp,_TS_GPR62)
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sti gr63,@(sp,_TS_GPR63)
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1:
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#endif
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movsg psr,gr4
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sti gr4,@(sp,_TS_PSR)
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movsg lr,gr4
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sti gr4,@(sp,_TS_PC)
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movsg ccr,gr4
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sti gr4,@(sp,_TS_CCR)
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movsg lcr,gr4
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sti gr4,@(sp,_TS_LCR)
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movsg cccr,gr4
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sti gr4,@(sp,_TS_CCCR)
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addi sp,_TS_size,gr4
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sti gr4,@(sp,_TS_SP)
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sti sp,@(gr9,0) // Pointer to saved context
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# Now load the destination thread by dropping through
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# to hal_thread_load_context
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// ----------------------------------------------------------------------------
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// hal_thread_load_context(new)
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// Load thread context
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// new = address of context of next thread to execute
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// Note that this function is also the second half of
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// hal_thread_switch_context and is simply dropped into from it.
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.globl hal_thread_load_context
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hal_thread_load_context:
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ldi @(gr8,0),sp // Saved context
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ldi @(sp,_TS_PSR),gr8
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setlos #~_PSR_ET,gr9 // Turn off exceptions
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and gr8,gr9,gr8
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setlos #_PSR_PS|_PSR_S,gr9 // Stay in supervisor mode
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or gr8,gr9,gr8
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movgs gr8,psr
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ldi @(sp,_TS_PC),gr8
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movgs gr8,pcsr
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ldi @(sp,_TS_CCR),gr8
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movgs gr8,ccr
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ldi @(sp,_TS_LCR),gr8
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movgs gr8,lcr
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ldi @(sp,_TS_CCCR),gr8
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movgs gr8,cccr
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#if _NGPR != 32
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#ifdef CYGINT_HAL_FRV_ARCH_FR400
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movsg HSR0,gr5
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srli gr5,#10,gr5
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andicc gr5,#1,gr0,icc0
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bne icc0,0,1f
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#endif
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ldi @(sp,_TS_GPR32),gr32
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ldi @(sp,_TS_GPR33),gr33
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ldi @(sp,_TS_GPR34),gr34
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ldi @(sp,_TS_GPR35),gr35
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ldi @(sp,_TS_GPR36),gr36
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ldi @(sp,_TS_GPR37),gr37
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ldi @(sp,_TS_GPR38),gr38
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ldi @(sp,_TS_GPR39),gr39
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ldi @(sp,_TS_GPR40),gr40
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ldi @(sp,_TS_GPR41),gr41
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ldi @(sp,_TS_GPR42),gr42
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ldi @(sp,_TS_GPR43),gr43
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ldi @(sp,_TS_GPR44),gr44
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ldi @(sp,_TS_GPR45),gr45
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ldi @(sp,_TS_GPR46),gr46
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ldi @(sp,_TS_GPR47),gr47
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ldi @(sp,_TS_GPR48),gr48
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ldi @(sp,_TS_GPR49),gr49
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ldi @(sp,_TS_GPR50),gr50
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ldi @(sp,_TS_GPR51),gr51
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ldi @(sp,_TS_GPR52),gr52
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ldi @(sp,_TS_GPR53),gr53
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ldi @(sp,_TS_GPR54),gr54
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ldi @(sp,_TS_GPR55),gr55
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ldi @(sp,_TS_GPR56),gr56
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ldi @(sp,_TS_GPR57),gr57
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ldi @(sp,_TS_GPR58),gr58
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ldi @(sp,_TS_GPR59),gr59
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ldi @(sp,_TS_GPR60),gr60
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ldi @(sp,_TS_GPR61),gr61
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ldi @(sp,_TS_GPR62),gr62
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ldi @(sp,_TS_GPR63),gr63
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1:
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#endif
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ldi @(sp,_TS_GPR2),gr2 // Restore registers
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ldi @(sp,_TS_GPR3),gr3
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ldi @(sp,_TS_GPR4),gr4
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ldi @(sp,_TS_GPR5),gr5
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ldi @(sp,_TS_GPR6),gr6
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ldi @(sp,_TS_GPR7),gr7
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ldi @(sp,_TS_GPR8),gr8
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ldi @(sp,_TS_GPR9),gr9
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ldi @(sp,_TS_GPR10),gr10
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| 232 |
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ldi @(sp,_TS_GPR11),gr11
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| 233 |
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ldi @(sp,_TS_GPR12),gr12
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| 234 |
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ldi @(sp,_TS_GPR13),gr13
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| 235 |
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ldi @(sp,_TS_GPR14),gr14
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| 236 |
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ldi @(sp,_TS_GPR15),gr15
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| 237 |
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ldi @(sp,_TS_GPR16),gr16
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| 238 |
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ldi @(sp,_TS_GPR17),gr17
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| 239 |
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ldi @(sp,_TS_GPR18),gr18
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| 240 |
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ldi @(sp,_TS_GPR19),gr19
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| 241 |
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ldi @(sp,_TS_GPR20),gr20
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| 242 |
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ldi @(sp,_TS_GPR21),gr21
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| 243 |
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ldi @(sp,_TS_GPR22),gr22
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| 244 |
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ldi @(sp,_TS_GPR23),gr23
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| 245 |
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ldi @(sp,_TS_GPR24),gr24
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| 246 |
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ldi @(sp,_TS_GPR25),gr25
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| 247 |
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ldi @(sp,_TS_GPR26),gr26
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| 248 |
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ldi @(sp,_TS_GPR27),gr27
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| 249 |
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ldi @(sp,_TS_GPR28),gr28
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| 250 |
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ldi @(sp,_TS_GPR29),gr29
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| 251 |
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ldi @(sp,_TS_GPR30),gr30
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| 252 |
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ldi @(sp,_TS_GPR31),gr31
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| 253 |
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ldi @(sp,_TS_SP),sp
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| 254 |
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rett #0
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| 255 |
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| 256 |
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// ----------------------------------------------------------------------------
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| 257 |
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// HAL longjmp, setjmp implementations - based on newlib
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| 258 |
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// Register jmpbuf offset
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| 259 |
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// R16-R31 0x0-0x03c
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| 260 |
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// R48-R63 0x40-0x7c
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| 261 |
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// FR16-FR31 0x80-0xbc
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| 262 |
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// FR48-FR63 0xc0-0xfc
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| 263 |
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// LR 0x100
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| 264 |
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// SP 0x104
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| 265 |
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// FP 0x108
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| 266 |
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//
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| 267 |
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// R8 contains the pointer to jmpbuf
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| 268 |
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| 269 |
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.text
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| 270 |
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.global hal_setjmp
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| 271 |
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.type hal_setjmp,@function
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| 272 |
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hal_setjmp:
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| 273 |
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stdi gr16, @(gr8,0)
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| 274 |
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stdi gr18, @(gr8,8)
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| 275 |
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stdi gr20, @(gr8,16)
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| 276 |
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stdi gr22, @(gr8,24)
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| 277 |
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stdi gr24, @(gr8,32)
|
| 278 |
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stdi gr26, @(gr8,40)
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| 279 |
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stdi gr28, @(gr8,48)
|
| 280 |
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stdi gr30, @(gr8,56)
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| 281 |
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#if _NGPR != 32
|
| 282 |
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#ifdef CYGINT_HAL_FRV_ARCH_FR400
|
| 283 |
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movsg HSR0,gr5
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| 284 |
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srli gr5,#10,gr5
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| 285 |
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andicc gr5,#1,gr0,icc0
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| 286 |
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bne icc0,0,1f
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| 287 |
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#endif
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| 288 |
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stdi gr48, @(gr8,64)
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| 289 |
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stdi gr50, @(gr8,72)
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| 290 |
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stdi gr52, @(gr8,80)
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| 291 |
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stdi gr54, @(gr8,88)
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| 292 |
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stdi gr56, @(gr8,96)
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| 293 |
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stdi gr58, @(gr8,104)
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| 294 |
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stdi gr60, @(gr8,112)
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| 295 |
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stdi gr62, @(gr8,120)
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| 296 |
|
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1:
|
| 297 |
|
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#endif
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| 298 |
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|
|
| 299 |
|
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#if _NFPR != 0
|
| 300 |
|
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stdfi fr16, @(gr8,128)
|
| 301 |
|
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stdfi fr18, @(gr8,136)
|
| 302 |
|
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stdfi fr20, @(gr8,144)
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| 303 |
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stdfi fr22, @(gr8,152)
|
| 304 |
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stdfi fr24, @(gr8,160)
|
| 305 |
|
|
stdfi fr26, @(gr8,168)
|
| 306 |
|
|
stdfi fr28, @(gr8,176)
|
| 307 |
|
|
stdfi fr30, @(gr8,184)
|
| 308 |
|
|
#if _NFPR != 32
|
| 309 |
|
|
#ifdef CYGINT_HAL_FRV_ARCH_FR400
|
| 310 |
|
|
movsg HSR0,gr5
|
| 311 |
|
|
srli gr5,#11,gr5
|
| 312 |
|
|
andicc gr5,#1,gr0,icc0
|
| 313 |
|
|
bne icc0,0,1f
|
| 314 |
|
|
#endif
|
| 315 |
|
|
stdfi fr48, @(gr8,192)
|
| 316 |
|
|
stdfi fr50, @(gr8,200)
|
| 317 |
|
|
stdfi fr52, @(gr8,208)
|
| 318 |
|
|
stdfi fr54, @(gr8,216)
|
| 319 |
|
|
stdfi fr56, @(gr8,224)
|
| 320 |
|
|
stdfi fr58, @(gr8,232)
|
| 321 |
|
|
stdfi fr60, @(gr8,240)
|
| 322 |
|
|
stdfi fr62, @(gr8,248)
|
| 323 |
|
|
1:
|
| 324 |
|
|
#endif
|
| 325 |
|
|
#endif
|
| 326 |
|
|
|
| 327 |
|
|
movsg lr, gr4
|
| 328 |
|
|
sti gr4, @(gr8,256)
|
| 329 |
|
|
sti sp, @(gr8,260)
|
| 330 |
|
|
sti fp, @(gr8,264)
|
| 331 |
|
|
|
| 332 |
|
|
mov gr0,gr8
|
| 333 |
|
|
ret
|
| 334 |
|
|
.Lend1:
|
| 335 |
|
|
.size hal_setjmp,.Lend1-hal_setjmp
|
| 336 |
|
|
|
| 337 |
|
|
.global hal_longjmp
|
| 338 |
|
|
.type hal_longjmp,@function
|
| 339 |
|
|
hal_longjmp:
|
| 340 |
|
|
#if _NFPR != 0
|
| 341 |
|
|
lddfi @(gr8,128), fr16
|
| 342 |
|
|
lddfi @(gr8,136), fr18
|
| 343 |
|
|
lddfi @(gr8,144), fr20
|
| 344 |
|
|
lddfi @(gr8,152), fr22
|
| 345 |
|
|
lddfi @(gr8,160), fr24
|
| 346 |
|
|
lddfi @(gr8,168), fr26
|
| 347 |
|
|
lddfi @(gr8,176), fr28
|
| 348 |
|
|
lddfi @(gr8,184), fr30
|
| 349 |
|
|
#if _NFPR != 32
|
| 350 |
|
|
#ifdef CYGINT_HAL_FRV_ARCH_FR400
|
| 351 |
|
|
movsg HSR0,gr5
|
| 352 |
|
|
srli gr5,#11,gr5
|
| 353 |
|
|
andicc gr5,#1,gr0,icc0
|
| 354 |
|
|
bne icc0,0,1f
|
| 355 |
|
|
#endif
|
| 356 |
|
|
lddfi @(gr8,192), fr48
|
| 357 |
|
|
lddfi @(gr8,200), fr50
|
| 358 |
|
|
lddfi @(gr8,208), fr52
|
| 359 |
|
|
lddfi @(gr8,216), fr54
|
| 360 |
|
|
lddfi @(gr8,224), fr56
|
| 361 |
|
|
lddfi @(gr8,232), fr58
|
| 362 |
|
|
lddfi @(gr8,240), fr60
|
| 363 |
|
|
lddfi @(gr8,248), fr62
|
| 364 |
|
|
1:
|
| 365 |
|
|
#endif
|
| 366 |
|
|
#endif
|
| 367 |
|
|
|
| 368 |
|
|
#if _NGPR != 32
|
| 369 |
|
|
#ifdef CYGINT_HAL_FRV_ARCH_FR400
|
| 370 |
|
|
movsg HSR0,gr5
|
| 371 |
|
|
srli gr5,#10,gr5
|
| 372 |
|
|
andicc gr5,#1,gr0,icc0
|
| 373 |
|
|
bne icc0,0,1f
|
| 374 |
|
|
#endif
|
| 375 |
|
|
lddi @(gr8,64), gr48
|
| 376 |
|
|
lddi @(gr8,72), gr50
|
| 377 |
|
|
lddi @(gr8,80), gr52
|
| 378 |
|
|
lddi @(gr8,88), gr54
|
| 379 |
|
|
lddi @(gr8,96), gr56
|
| 380 |
|
|
lddi @(gr8,104), gr58
|
| 381 |
|
|
lddi @(gr8,112), gr60
|
| 382 |
|
|
lddi @(gr8,120), gr62
|
| 383 |
|
|
1:
|
| 384 |
|
|
#endif
|
| 385 |
|
|
lddi @(gr8,0), gr16
|
| 386 |
|
|
lddi @(gr8,8), gr18
|
| 387 |
|
|
lddi @(gr8,16), gr20
|
| 388 |
|
|
lddi @(gr8,24), gr22
|
| 389 |
|
|
lddi @(gr8,32), gr24
|
| 390 |
|
|
lddi @(gr8,40), gr26
|
| 391 |
|
|
lddi @(gr8,48), gr28
|
| 392 |
|
|
lddi @(gr8,56), gr30
|
| 393 |
|
|
|
| 394 |
|
|
|
| 395 |
|
|
ldi @(gr8,256), gr4
|
| 396 |
|
|
movgs gr4,lr
|
| 397 |
|
|
|
| 398 |
|
|
ldi @(gr8,260), sp
|
| 399 |
|
|
ldi @(gr8,264), fp
|
| 400 |
|
|
|
| 401 |
|
|
# Value to return is in r9. If zero, return 1
|
| 402 |
|
|
cmp gr9, gr0, icc0
|
| 403 |
|
|
setlos #1, gr8
|
| 404 |
|
|
ckne icc0, cc4
|
| 405 |
|
|
cmov gr9, gr8, cc4, 1
|
| 406 |
|
|
ret
|
| 407 |
|
|
.Lend2:
|
| 408 |
|
|
.size hal_longjmp,.Lend2-hal_longjmp2
|
| 409 |
|
|
|
| 410 |
|
|
// ----------------------------------------------------------------------------
|
| 411 |
|
|
// end of context.S
|
