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/* $Id: VIS.h,v 1.4 1999/05/25 16:52:50 jj Exp $
* VIS.h: High speed copy/clear operations utilizing the UltraSparc
* Visual Instruction Set.
*
* Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
* Copyright (C) 1996, 1997, 1999 Jakub Jelinek (jj@ultra.linux.cz)
*/
/* VIS code can be used for numerous copy/set operation variants.
* It can be made to work in the kernel, one single instance,
* for all of memcpy, copy_to_user, and copy_from_user by setting
* the ASI src/dest globals correctly. Furthermore it can
* be used for kernel-->kernel page copies as well, a hook label
* is put in here just for this purpose.
*
* For userland, compiling this without __KERNEL__ defined makes
* it work just fine as a generic libc bcopy and memcpy.
* If for userland it is compiled with a 32bit gcc (but you need
* -Wa,-Av9a), the code will just rely on lower 32bits of
* IEU registers, if you compile it with 64bit gcc (ie. define
* __sparc_v9__), the code will use full 64bit.
*/
#ifndef __VIS_H
#define __VIS_H
#ifdef __KERNEL__
#include <asm/head.h>
#include <asm/asi.h>
#else
#define ASI_AIUS 0x11 /* Secondary, user */
#define ASI_BLK_AIUS 0x71 /* Secondary, user, blk ld/st */
#define ASI_P 0x80 /* Primary, implicit */
#define ASI_S 0x81 /* Secondary, implicit */
#define ASI_BLK_COMMIT_P 0xe0 /* Primary, blk store commit */
#define ASI_BLK_COMMIT_S 0xe1 /* Secondary, blk store commit */
#define ASI_BLK_P 0xf0 /* Primary, blk ld/st */
#define ASI_BLK_S 0xf1 /* Secondary, blk ld/st */
#define FPRS_FEF 0x04
#endif
/* I'm telling you, they really did this chip right.
* Perhaps the SunSoft folks should visit some of the
* people in Sun Microelectronics and start some brain
* cell exchange program...
*/
#define ASI_BLK_XOR (ASI_P ^ ASI_BLK_P)
/* Well, things get more hairy if we use ASI_AIUS as
* USER_DS and ASI_P as KERNEL_DS, we'd reach
* commit block stores this way which is not what we want...
*/
/* ASI_P->ASI_BLK_P && ASI_AIUS->ASI_BLK_AIUS transitions can be done
* as blkasi = asi | ASI_BLK_OR
*/
#define ASI_BLK_OR (ASI_BLK_P & ~ASI_P)
/* Transition back from ASI_BLK_P->ASI_P && ASI_BLK_AIUS->ASI_AIUS is
* more complicated:
* asi = blkasi ^ (blkasi >> 3) ^ ASI_BLK_XOR1
*/
#define ASI_BLK_XOR1 (ASI_BLK_P ^ (ASI_BLK_P >> 3) ^ ASI_P)
#define asi_src %o3
#define asi_dest %o4
#ifdef __KERNEL__
#define ASI_SETSRC_BLK wr asi_src, 0, %asi;
#define ASI_SETSRC_NOBLK wr asi_src, 0, %asi;
#define ASI_SETDST_BLK wr asi_dest, 0, %asi;
#define ASI_SETDST_NOBLK wr asi_dest, 0, %asi;
#define ASIBLK %asi
#define ASINORMAL %asi
#define LDUB lduba
#define LDUH lduha
#define LDUW lduwa
#define LDX ldxa
#define LDD ldda
#define LDDF ldda
#define LDBLK ldda
#define STB stba
#define STH stha
#define STW stwa
#define STD stda
#define STX stxa
#define STDF stda
#define STBLK stda
#else
#define ASI_SETSRC_BLK
#define ASI_SETSRC_NOBLK
#define ASI_SETDST_BLK
#define ASI_SETDST_NOBLK
#define ASI_SETDST_SPECIAL
#define ASIBLK %asi
#define ASINORMAL
#define LDUB ldub
#define LDUH lduh
#define LDUW lduw
#define LDD ldd
#define LDX ldx
#define LDDF ldd
#define LDBLK ldda
#define STB stb
#define STH sth
#define STW stw
#define STD std
#define STX stx
#define STDF std
#define STBLK stda
#endif
#ifdef __KERNEL__
#define REGS_64BIT
#else
#ifndef REGS_64BIT
#ifdef __sparc_v9__
#define REGS_64BIT
#endif
#endif
#endif
#ifndef REGS_64BIT
#define xcc icc
#endif
#endif
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