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/* cpu_asm.s
*
* This file contains the basic algorithms for all assembly code used
* in an specific CPU port of RTEMS. These algorithms must be implemented
* in assembly language.
*
* COPYRIGHT (c) 1989-2011.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*
* Ported to ERC32 implementation of the SPARC by On-Line Applications
* Research Corporation (OAR) under contract to the European Space
* Agency (ESA).
*
* ERC32 modifications of respective RTEMS file: COPYRIGHT (c) 1995.
* European Space Agency.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/asm.h>
#include <rtems/system.h>
#if (SPARC_HAS_FPU == 1)
/*
* void _CPU_Context_save_fp(
* void **fp_context_ptr
* )
*
* This routine is responsible for saving the FP context
* at *fp_context_ptr. If the point to load the FP context
* from is changed then the pointer is modified by this routine.
*
* NOTE: See the README in this directory for information on the
* management of the "EF" bit in the PSR.
*/
.align 4
PUBLIC(_CPU_Context_save_fp)
SYM(_CPU_Context_save_fp):
/*
* The following enables the floating point unit.
*/
mov %psr, %o1
sethi %hi(SPARC_PSR_EF_MASK), %o2
or %o2, %lo(SPARC_PSR_EF_MASK), %o2
or %o1, %o2, %o1
mov %o1, %psr ! **** ENABLE FLOAT ACCESS ****
nop; nop; nop; ! Need three nops before EF is
ld [%o0], %o1 ! active due to pipeline delay!!!
std %f0, [%o1 + FO_F1_OFFSET]
std %f2, [%o1 + F2_F3_OFFSET]
std %f4, [%o1 + F4_F5_OFFSET]
std %f6, [%o1 + F6_F7_OFFSET]
std %f8, [%o1 + F8_F9_OFFSET]
std %f10, [%o1 + F1O_F11_OFFSET]
std %f12, [%o1 + F12_F13_OFFSET]
std %f14, [%o1 + F14_F15_OFFSET]
std %f16, [%o1 + F16_F17_OFFSET]
std %f18, [%o1 + F18_F19_OFFSET]
std %f20, [%o1 + F2O_F21_OFFSET]
std %f22, [%o1 + F22_F23_OFFSET]
std %f24, [%o1 + F24_F25_OFFSET]
std %f26, [%o1 + F26_F27_OFFSET]
std %f28, [%o1 + F28_F29_OFFSET]
std %f30, [%o1 + F3O_F31_OFFSET]
jmp %o7 + 8
st %fsr, [%o1 + FSR_OFFSET]
/*
* void _CPU_Context_restore_fp(
* void **fp_context_ptr
* )
*
* This routine is responsible for restoring the FP context
* at *fp_context_ptr. If the point to load the FP context
* from is changed then the pointer is modified by this routine.
*
* NOTE: See the README in this directory for information on the
* management of the "EF" bit in the PSR.
*/
.align 4
PUBLIC(_CPU_Context_restore_fp)
SYM(_CPU_Context_restore_fp):
/*
* The following enables the floating point unit.
*/
mov %psr, %o1
sethi %hi(SPARC_PSR_EF_MASK), %o2
or %o2, %lo(SPARC_PSR_EF_MASK), %o2
or %o1, %o2, %o1
mov %o1, %psr ! **** ENABLE FLOAT ACCESS ****
nop; nop; nop; ! Need three nops before EF is
ld [%o0], %o1 ! active due to pipeline delay!!!
ldd [%o1 + FO_F1_OFFSET], %f0
ldd [%o1 + F2_F3_OFFSET], %f2
ldd [%o1 + F4_F5_OFFSET], %f4
ldd [%o1 + F6_F7_OFFSET], %f6
ldd [%o1 + F8_F9_OFFSET], %f8
ldd [%o1 + F1O_F11_OFFSET], %f10
ldd [%o1 + F12_F13_OFFSET], %f12
ldd [%o1 + F14_F15_OFFSET], %f14
ldd [%o1 + F16_F17_OFFSET], %f16
ldd [%o1 + F18_F19_OFFSET], %f18
ldd [%o1 + F2O_F21_OFFSET], %f20
ldd [%o1 + F22_F23_OFFSET], %f22
ldd [%o1 + F24_F25_OFFSET], %f24
ldd [%o1 + F26_F27_OFFSET], %f26
ldd [%o1 + F28_F29_OFFSET], %f28
ldd [%o1 + F3O_F31_OFFSET], %f30
jmp %o7 + 8
ld [%o1 + FSR_OFFSET], %fsr
#endif /* SPARC_HAS_FPU */
/* end of file */
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