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// #===========================================================================
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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 Red Hat, 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 version.
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//
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// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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// 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 along
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// with eCos; if not, write to the Free Software Foundation, Inc.,
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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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//
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// As a special exception, if other files instantiate templates or use macros
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// or inline functions from this file, or you compile this file and link it
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// with other works to produce a work based on this file, this file does not
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// by itself cause the resulting work to be covered by the GNU General Public
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// License. However the source code for this file must still be made available
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// in accordance with section (3) of the GNU General Public License.
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//
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// This exception does not invalidate any other reasons why a work based on
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// this file might be covered by the GNU General Public License.
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//
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// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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// at http://sources.redhat.com/ecos/ecos-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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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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#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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152 |
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// ----------------------------------------------------------------------------
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153 |
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// hal_thread_load_context(new)
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154 |
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// Load thread context
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155 |
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// new = address of context of next thread to execute
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156 |
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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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158 |
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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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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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ldi @(sp,_TS_GPR11),gr11
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ldi @(sp,_TS_GPR12),gr12
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ldi @(sp,_TS_GPR13),gr13
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ldi @(sp,_TS_GPR14),gr14
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ldi @(sp,_TS_GPR15),gr15
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ldi @(sp,_TS_GPR16),gr16
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ldi @(sp,_TS_GPR17),gr17
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ldi @(sp,_TS_GPR18),gr18
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ldi @(sp,_TS_GPR19),gr19
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ldi @(sp,_TS_GPR20),gr20
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ldi @(sp,_TS_GPR21),gr21
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ldi @(sp,_TS_GPR22),gr22
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ldi @(sp,_TS_GPR23),gr23
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ldi @(sp,_TS_GPR24),gr24
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ldi @(sp,_TS_GPR25),gr25
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ldi @(sp,_TS_GPR26),gr26
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ldi @(sp,_TS_GPR27),gr27
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ldi @(sp,_TS_GPR28),gr28
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ldi @(sp,_TS_GPR29),gr29
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ldi @(sp,_TS_GPR30),gr30
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ldi @(sp,_TS_GPR31),gr31
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#if _NGPR != 32
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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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216 |
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ldi @(sp,_TS_GPR41),gr41
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217 |
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ldi @(sp,_TS_GPR42),gr42
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218 |
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ldi @(sp,_TS_GPR43),gr43
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219 |
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ldi @(sp,_TS_GPR44),gr44
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220 |
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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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223 |
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ldi @(sp,_TS_GPR48),gr48
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224 |
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ldi @(sp,_TS_GPR49),gr49
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225 |
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ldi @(sp,_TS_GPR50),gr50
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226 |
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ldi @(sp,_TS_GPR51),gr51
|
227 |
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ldi @(sp,_TS_GPR52),gr52
|
228 |
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ldi @(sp,_TS_GPR53),gr53
|
229 |
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ldi @(sp,_TS_GPR54),gr54
|
230 |
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ldi @(sp,_TS_GPR55),gr55
|
231 |
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ldi @(sp,_TS_GPR56),gr56
|
232 |
|
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ldi @(sp,_TS_GPR57),gr57
|
233 |
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ldi @(sp,_TS_GPR58),gr58
|
234 |
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ldi @(sp,_TS_GPR59),gr59
|
235 |
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ldi @(sp,_TS_GPR60),gr60
|
236 |
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ldi @(sp,_TS_GPR61),gr61
|
237 |
|
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ldi @(sp,_TS_GPR62),gr62
|
238 |
|
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ldi @(sp,_TS_GPR63),gr63
|
239 |
|
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#endif
|
240 |
|
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ldi @(sp,_TS_SP),sp
|
241 |
|
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rett #0
|
242 |
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|
243 |
|
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// ----------------------------------------------------------------------------
|
244 |
|
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// HAL longjmp, setjmp implementations - based on newlib
|
245 |
|
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// Register jmpbuf offset
|
246 |
|
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// R16-R31 0x0-0x03c
|
247 |
|
|
// R48-R63 0x40-0x7c
|
248 |
|
|
// FR16-FR31 0x80-0xbc
|
249 |
|
|
// FR48-FR63 0xc0-0xfc
|
250 |
|
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// LR 0x100
|
251 |
|
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// SP 0x104
|
252 |
|
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// FP 0x108
|
253 |
|
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//
|
254 |
|
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// R8 contains the pointer to jmpbuf
|
255 |
|
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|
256 |
|
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.text
|
257 |
|
|
.global hal_setjmp
|
258 |
|
|
.type hal_setjmp,@function
|
259 |
|
|
hal_setjmp:
|
260 |
|
|
stdi gr16, @(gr8,0)
|
261 |
|
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stdi gr18, @(gr8,8)
|
262 |
|
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stdi gr20, @(gr8,16)
|
263 |
|
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stdi gr22, @(gr8,24)
|
264 |
|
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stdi gr24, @(gr8,32)
|
265 |
|
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stdi gr26, @(gr8,40)
|
266 |
|
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stdi gr28, @(gr8,48)
|
267 |
|
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stdi gr30, @(gr8,56)
|
268 |
|
|
#if _NGPR != 32
|
269 |
|
|
stdi gr48, @(gr8,64)
|
270 |
|
|
stdi gr50, @(gr8,72)
|
271 |
|
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stdi gr52, @(gr8,80)
|
272 |
|
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stdi gr54, @(gr8,88)
|
273 |
|
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stdi gr56, @(gr8,96)
|
274 |
|
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stdi gr58, @(gr8,104)
|
275 |
|
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stdi gr60, @(gr8,112)
|
276 |
|
|
stdi gr62, @(gr8,120)
|
277 |
|
|
#endif
|
278 |
|
|
|
279 |
|
|
#if _NFPR != 0
|
280 |
|
|
stdfi fr16, @(gr8,128)
|
281 |
|
|
stdfi fr18, @(gr8,136)
|
282 |
|
|
stdfi fr20, @(gr8,144)
|
283 |
|
|
stdfi fr22, @(gr8,152)
|
284 |
|
|
stdfi fr24, @(gr8,160)
|
285 |
|
|
stdfi fr26, @(gr8,168)
|
286 |
|
|
stdfi fr28, @(gr8,176)
|
287 |
|
|
stdfi fr30, @(gr8,184)
|
288 |
|
|
#if _NFPR != 32
|
289 |
|
|
stdfi fr48, @(gr8,192)
|
290 |
|
|
stdfi fr50, @(gr8,200)
|
291 |
|
|
stdfi fr52, @(gr8,208)
|
292 |
|
|
stdfi fr54, @(gr8,216)
|
293 |
|
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stdfi fr56, @(gr8,224)
|
294 |
|
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stdfi fr58, @(gr8,232)
|
295 |
|
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stdfi fr60, @(gr8,240)
|
296 |
|
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stdfi fr62, @(gr8,248)
|
297 |
|
|
#endif
|
298 |
|
|
#endif
|
299 |
|
|
|
300 |
|
|
movsg lr, gr4
|
301 |
|
|
sti gr4, @(gr8,256)
|
302 |
|
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sti sp, @(gr8,260)
|
303 |
|
|
sti fp, @(gr8,264)
|
304 |
|
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|
305 |
|
|
mov gr0,gr8
|
306 |
|
|
ret
|
307 |
|
|
.Lend1:
|
308 |
|
|
.size hal_setjmp,.Lend1-hal_setjmp
|
309 |
|
|
|
310 |
|
|
.global hal_longjmp
|
311 |
|
|
.type hal_longjmp,@function
|
312 |
|
|
hallongjmp:
|
313 |
|
|
lddi @(gr8,0), gr16
|
314 |
|
|
lddi @(gr8,8), gr18
|
315 |
|
|
lddi @(gr8,16), gr20
|
316 |
|
|
lddi @(gr8,24), gr22
|
317 |
|
|
lddi @(gr8,32), gr24
|
318 |
|
|
lddi @(gr8,40), gr26
|
319 |
|
|
lddi @(gr8,48), gr28
|
320 |
|
|
lddi @(gr8,56), gr30
|
321 |
|
|
#if _NGPR != 32
|
322 |
|
|
lddi @(gr8,64), gr48
|
323 |
|
|
lddi @(gr8,72), gr50
|
324 |
|
|
lddi @(gr8,80), gr52
|
325 |
|
|
lddi @(gr8,88), gr54
|
326 |
|
|
lddi @(gr8,96), gr56
|
327 |
|
|
lddi @(gr8,104), gr58
|
328 |
|
|
lddi @(gr8,112), gr60
|
329 |
|
|
lddi @(gr8,120), gr62
|
330 |
|
|
#endif
|
331 |
|
|
|
332 |
|
|
#if _NFPR != 0
|
333 |
|
|
lddfi @(gr8,128), fr16
|
334 |
|
|
lddfi @(gr8,136), fr18
|
335 |
|
|
lddfi @(gr8,144), fr20
|
336 |
|
|
lddfi @(gr8,152), fr22
|
337 |
|
|
lddfi @(gr8,160), fr24
|
338 |
|
|
lddfi @(gr8,168), fr26
|
339 |
|
|
lddfi @(gr8,176), fr28
|
340 |
|
|
lddfi @(gr8,184), fr30
|
341 |
|
|
#if _NFPR != 32
|
342 |
|
|
lddfi @(gr8,192), fr48
|
343 |
|
|
lddfi @(gr8,200), fr50
|
344 |
|
|
lddfi @(gr8,208), fr52
|
345 |
|
|
lddfi @(gr8,216), fr54
|
346 |
|
|
lddfi @(gr8,224), fr56
|
347 |
|
|
lddfi @(gr8,232), fr58
|
348 |
|
|
lddfi @(gr8,240), fr60
|
349 |
|
|
lddfi @(gr8,248), fr62
|
350 |
|
|
#endif
|
351 |
|
|
#endif
|
352 |
|
|
|
353 |
|
|
ldi @(gr8,256), gr4
|
354 |
|
|
movgs gr4,lr
|
355 |
|
|
|
356 |
|
|
ldi @(gr8,260), sp
|
357 |
|
|
ldi @(gr8,264), fp
|
358 |
|
|
|
359 |
|
|
# Value to return is in r9. If zero, return 1
|
360 |
|
|
cmp gr9, gr0, icc0
|
361 |
|
|
setlos #1, gr8
|
362 |
|
|
ckne icc0, cc4
|
363 |
|
|
cmov gr9, gr8, cc4, 1
|
364 |
|
|
ret
|
365 |
|
|
.Lend2:
|
366 |
|
|
.size hal_longjmp,.Lend2-hal_longjmp2
|
367 |
|
|
|
368 |
|
|
// ----------------------------------------------------------------------------
|
369 |
|
|
// end of context.S
|