/*
* This header file contains assembly - language definitions ( assembly
* macros , etc . ) for this specific Xtensa processor ' s TIE extensions
* and options . It is customized to this Xtensa processor configuration .
*
* This file is subject to the terms and conditions of the GNU General Public
* License . See the file " COPYING " in the main directory of this archive
* for more details .
*
* Copyright ( C ) 1999 - 2007 Tensilica Inc .
*/
#ifndef _XTENSA_CORE_TIE_ASM_H
#define _XTENSA_CORE_TIE_ASM_H
/* Selection parameter values for save-area save/restore macros: */
/* Option vs. TIE: */
#define XTHAL_SAS_TIE 0 x0001 /* custom extension or coprocessor */
#define XTHAL_SAS_OPT 0 x0002 /* optional (and not a coprocessor) */
/* Whether used automatically by compiler: */
#define XTHAL_SAS_NOCC 0 x0004 /* not used by compiler w/o special opts/code */
#define XTHAL_SAS_CC 0 x0008 /* used by compiler without special opts/code */
/* ABI handling across function calls: */
#define XTHAL_SAS_CALR 0 x0010 /* caller-saved */
#define XTHAL_SAS_CALE 0 x0020 /* callee-saved */
#define XTHAL_SAS_GLOB 0 x0040 /* global across function calls (in thread) */
/* Misc */
#define XTHAL_SAS_ALL 0 xFFFF /* include all default NCP contents */
/* Macro to save all non-coprocessor (extra) custom TIE and optional state
* ( not including zero - overhead loop registers ) .
* Save area ptr ( clobbered ) : ptr ( 1 byte aligned )
* Scratch regs ( clobbered ) : at1 . . at4 ( only first XCHAL_NCP_NUM_ATMPS needed )
*/
.macro xchal_ncp_store ptr at1 at2 at3 at4 continue =0 ofs=-1 select=XTHAL_SAS_ALL
xchal_sa_start \continue , \ofs
.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~\select
xchal_sa_align \ptr, 0 , 1024 -8 , 4 , 4
rsr \at1, ACCLO // MAC16 accumulator
rsr \at2, ACCHI
s32i \at1, \ptr, .Lxchal_ofs_ + 0
s32i \at2, \ptr, .Lxchal_ofs_ + 4
.set .Lxchal_ofs_, .Lxchal_ofs_ + 8
.endif
.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~\select
xchal_sa_align \ptr, 0 , 1024 -16 , 4 , 4
rsr \at1, M0 // MAC16 registers
rsr \at2, M1
s32i \at1, \ptr, .Lxchal_ofs_ + 0
s32i \at2, \ptr, .Lxchal_ofs_ + 4
rsr \at1, M2
rsr \at2, M3
s32i \at1, \ptr, .Lxchal_ofs_ + 8
s32i \at2, \ptr, .Lxchal_ofs_ + 12
.set .Lxchal_ofs_, .Lxchal_ofs_ + 16
.endif
.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~\select
xchal_sa_align \ptr, 0 , 1024 -4 , 4 , 4
rsr \at1, SCOMPARE1 // conditional store option
s32i \at1, \ptr, .Lxchal_ofs_ + 0
.set .Lxchal_ofs_, .Lxchal_ofs_ + 4
.endif
.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~\select
xchal_sa_align \ptr, 0 , 1024 -4 , 4 , 4
rur \at1, THREADPTR // threadptr option
s32i \at1, \ptr, .Lxchal_ofs_ + 0
.set .Lxchal_ofs_, .Lxchal_ofs_ + 4
.endif
.endm // xchal_ncp_store
/* Macro to save all non-coprocessor (extra) custom TIE and optional state
* ( not including zero - overhead loop registers ) .
* Save area ptr ( clobbered ) : ptr ( 1 byte aligned )
* Scratch regs ( clobbered ) : at1 . . at4 ( only first XCHAL_NCP_NUM_ATMPS needed )
*/
.macro xchal_ncp_load ptr at1 at2 at3 at4 continue =0 ofs=-1 select=XTHAL_SAS_ALL
xchal_sa_start \continue , \ofs
.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~\select
xchal_sa_align \ptr, 0 , 1024 -8 , 4 , 4
l32i \at1, \ptr, .Lxchal_ofs_ + 0
l32i \at2, \ptr, .Lxchal_ofs_ + 4
wsr \at1, ACCLO // MAC16 accumulator
wsr \at2, ACCHI
.set .Lxchal_ofs_, .Lxchal_ofs_ + 8
.endif
.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~\select
xchal_sa_align \ptr, 0 , 1024 -16 , 4 , 4
l32i \at1, \ptr, .Lxchal_ofs_ + 0
l32i \at2, \ptr, .Lxchal_ofs_ + 4
wsr \at1, M0 // MAC16 registers
wsr \at2, M1
l32i \at1, \ptr, .Lxchal_ofs_ + 8
l32i \at2, \ptr, .Lxchal_ofs_ + 12
wsr \at1, M2
wsr \at2, M3
.set .Lxchal_ofs_, .Lxchal_ofs_ + 16
.endif
.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~\select
xchal_sa_align \ptr, 0 , 1024 -4 , 4 , 4
l32i \at1, \ptr, .Lxchal_ofs_ + 0
wsr \at1, SCOMPARE1 // conditional store option
.set .Lxchal_ofs_, .Lxchal_ofs_ + 4
.endif
.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~\select
xchal_sa_align \ptr, 0 , 1024 -4 , 4 , 4
l32i \at1, \ptr, .Lxchal_ofs_ + 0
wur \at1, THREADPTR // threadptr option
.set .Lxchal_ofs_, .Lxchal_ofs_ + 4
.endif
.endm // xchal_ncp_load
#define XCHAL_NCP_NUM_ATMPS 2
#define XCHAL_SA_NUM_ATMPS 2
#endif /*_XTENSA_CORE_TIE_ASM_H*/
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