/* $Id: asi.h,v 1.16 1996/04/25 06:12:43 davem Exp $ */
#ifndef _SPARC_ASI_H
#define _SPARC_ASI_H

/* asi.h:  Address Space Identifier values for the sparc.
 *
 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
 *
 * Pioneer work for sun4m: Paul Hatchman (paul@sfe.com.au)
 * Joint edition for sun4c+sun4m: Pete A. Zaitcev <zaitcev@ipmce.su>
 */

/* The first batch are for the sun4c. */

#define ASI_NULL1           0x00
#define ASI_NULL2           0x01

/* sun4c and sun4 control registers and mmu/vac ops */
#define ASI_CONTROL         0x02
#define ASI_SEGMAP          0x03
#define ASI_PTE             0x04
#define ASI_HWFLUSHSEG      0x05
#define ASI_HWFLUSHPAGE     0x06
#define ASI_REGMAP          0x06
#define ASI_HWFLUSHCONTEXT  0x07

#define ASI_USERTXT         0x08
#define ASI_KERNELTXT       0x09
#define ASI_USERDATA        0x0a
#define ASI_KERNELDATA      0x0b

/* VAC Cache flushing on sun4c and sun4 */
#define ASI_FLUSHSEG        0x0c
#define ASI_FLUSHPG         0x0d
#define ASI_FLUSHCTX        0x0e

/* SPARCstation-5: only 6 bits are decoded. */
/* wo = Write Only, rw = Read Write;        */
/* ss = Single Size, as = All Sizes;        */
#define ASI_M_RES00         0x00   /* Don't touch... */
#define ASI_M_UNA01         0x01   /* Same here... */
#define ASI_M_MXCC          0x02   /* Access to TI VIKING MXCC registers */
#define ASI_M_FLUSH_PROBE   0x03   /* Reference MMU Flush/Probe; rw, ss */
#define ASI_M_MMUREGS       0x04   /* MMU Registers; rw, ss */
#define ASI_M_TLBDIAG       0x05   /* MMU TLB only Diagnostics */
#define ASI_M_DIAGS         0x06   /* Reference MMU Diagnostics */
#define ASI_M_IODIAG        0x07   /* MMU I/O TLB only Diagnostics */
#define ASI_M_USERTXT       0x08   /* Same as ASI_USERTXT; rw, as */
#define ASI_M_KERNELTXT     0x09   /* Same as ASI_KERNELTXT; rw, as */
#define ASI_M_USERDATA      0x0A   /* Same as ASI_USERDATA; rw, as */
#define ASI_M_KERNELDATA    0x0B   /* Same as ASI_KERNELDATA; rw, as */
#define ASI_M_TXTC_TAG      0x0C   /* Instruction Cache Tag; rw, ss */
#define ASI_M_TXTC_DATA     0x0D   /* Instruction Cache Data; rw, ss */
#define ASI_M_DATAC_TAG     0x0E   /* Data Cache Tag; rw, ss */
#define ASI_M_DATAC_DATA    0x0F   /* Data Cache Data; rw, ss */

/* The following cache flushing ASIs work only with the 'sta'
 * instruction. Results are unpredictable for 'swap' and 'ldstuba',
 * so don't do it.
 */

/* These ASI flushes affect external caches too. */
#define ASI_M_FLUSH_PAGE    0x10   /* Flush I&D Cache Line (page); wo, ss */
#define ASI_M_FLUSH_SEG     0x11   /* Flush I&D Cache Line (seg); wo, ss */
#define ASI_M_FLUSH_REGION  0x12   /* Flush I&D Cache Line (region); wo, ss */
#define ASI_M_FLUSH_CTX     0x13   /* Flush I&D Cache Line (context); wo, ss */
#define ASI_M_FLUSH_USER    0x14   /* Flush I&D Cache Line (user); wo, ss */

/* Block-copy operations are available only on certain V8 cpus. */
#define ASI_M_BCOPY         0x17   /* Block copy */

/* These affect only the ICACHE and are Ross HyperSparc specific. */
#define ASI_M_IFLUSH_PAGE   0x18   /* Flush I Cache Line (page); wo, ss */
#define ASI_M_IFLUSH_SEG    0x19   /* Flush I Cache Line (seg); wo, ss */
#define ASI_M_IFLUSH_REGION 0x1A   /* Flush I Cache Line (region); wo, ss */
#define ASI_M_IFLUSH_CTX    0x1B   /* Flush I Cache Line (context); wo, ss */
#define ASI_M_IFLUSH_USER   0x1C   /* Flush I Cache Line (user); wo, ss */

/* Block-fill operations are available on certain V8 cpus */
#define ASI_M_BFILL         0x1F

/* This allows direct access to main memory, actually 0x20 to 0x2f are
 * the available ASI's for physical ram pass-through, but I don't have
 * any idea what the other ones do....
 */

#define ASI_M_BYPASS       0x20   /* Reference MMU bypass; rw, as */
#define ASI_M_FBMEM        0x29   /* Graphics card frame buffer access */
#define ASI_M_VMEUS        0x2A   /* VME user 16-bit access */
#define ASI_M_VMEPS        0x2B   /* VME priv 16-bit access */
#define ASI_M_VMEUT        0x2C   /* VME user 32-bit access */
#define ASI_M_VMEPT        0x2D   /* VME priv 32-bit access */
#define ASI_M_SBUS         0x2E   /* Direct SBus access */
#define ASI_M_CTL          0x2F   /* Control Space (ECC and MXCC are here) */


/* This is ROSS HyperSparc only. */
#define ASI_M_FLUSH_IWHOLE 0x31   /* Flush entire ICACHE; wo, ss */

/* Tsunami/Viking i/d cache flash clear. */
#define ASI_M_IC_FLCLEAR   0x36
#define ASI_M_DC_FLCLEAR   0x37

#define ASI_M_DCDR         0x39   /* Data Cache Diagnostics Register rw, ss */

#define ASI_M_ACTION       0x4c   /* Breakpoint Action Register (GNU/Viking) */

#endif /* _SPARC_ASI_H */
