132 lines
5 KiB
C
132 lines
5 KiB
C
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/*
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* This header file describes this specific Xtensa processor's TIE extensions
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* that extend basic Xtensa core functionality. It is customized to this
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* Xtensa processor configuration.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1999-2007 Tensilica Inc.
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*/
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#ifndef _XTENSA_CORE_TIE_H
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#define _XTENSA_CORE_TIE_H
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#define XCHAL_CP_NUM 1 /* number of coprocessors */
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#define XCHAL_CP_MAX 8 /* max CP ID + 1 (0 if none) */
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#define XCHAL_CP_MASK 0x80 /* bitmask of all CPs by ID */
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#define XCHAL_CP_PORT_MASK 0x80 /* bitmask of only port CPs */
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/* Basic parameters of each coprocessor: */
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#define XCHAL_CP7_NAME "XTIOP"
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#define XCHAL_CP7_IDENT XTIOP
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#define XCHAL_CP7_SA_SIZE 0 /* size of state save area */
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#define XCHAL_CP7_SA_ALIGN 1 /* min alignment of save area */
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#define XCHAL_CP_ID_XTIOP 7 /* coprocessor ID (0..7) */
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/* Filler info for unassigned coprocessors, to simplify arrays etc: */
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#define XCHAL_CP0_SA_SIZE 0
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#define XCHAL_CP0_SA_ALIGN 1
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#define XCHAL_CP1_SA_SIZE 0
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#define XCHAL_CP1_SA_ALIGN 1
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#define XCHAL_CP2_SA_SIZE 0
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#define XCHAL_CP2_SA_ALIGN 1
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#define XCHAL_CP3_SA_SIZE 0
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#define XCHAL_CP3_SA_ALIGN 1
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#define XCHAL_CP4_SA_SIZE 0
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#define XCHAL_CP4_SA_ALIGN 1
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#define XCHAL_CP5_SA_SIZE 0
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#define XCHAL_CP5_SA_ALIGN 1
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#define XCHAL_CP6_SA_SIZE 0
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#define XCHAL_CP6_SA_ALIGN 1
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/* Save area for non-coprocessor optional and custom (TIE) state: */
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#define XCHAL_NCP_SA_SIZE 32
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#define XCHAL_NCP_SA_ALIGN 4
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/* Total save area for optional and custom state (NCP + CPn): */
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#define XCHAL_TOTAL_SA_SIZE 32 /* with 16-byte align padding */
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#define XCHAL_TOTAL_SA_ALIGN 4 /* actual minimum alignment */
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/*
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* Detailed contents of save areas.
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* NOTE: caller must define the XCHAL_SA_REG macro (not defined here)
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* before expanding the XCHAL_xxx_SA_LIST() macros.
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*
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* XCHAL_SA_REG(s,ccused,abikind,kind,opt,name,galign,align,asize,
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* dbnum,base,regnum,bitsz,gapsz,reset,x...)
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*
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* s = passed from XCHAL_*_LIST(s), eg. to select how to expand
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* ccused = set if used by compiler without special options or code
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* abikind = 0 (caller-saved), 1 (callee-saved), or 2 (thread-global)
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* kind = 0 (special reg), 1 (TIE user reg), or 2 (TIE regfile reg)
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* opt = 0 (custom TIE extension or coprocessor), or 1 (optional reg)
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* name = lowercase reg name (no quotes)
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* galign = group byte alignment (power of 2) (galign >= align)
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* align = register byte alignment (power of 2)
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* asize = allocated size in bytes (asize*8 == bitsz + gapsz + padsz)
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* (not including any pad bytes required to galign this or next reg)
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* dbnum = unique target number f/debug (see <xtensa-libdb-macros.h>)
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* base = reg shortname w/o index (or sr=special, ur=TIE user reg)
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* regnum = reg index in regfile, or special/TIE-user reg number
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* bitsz = number of significant bits (regfile width, or ur/sr mask bits)
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* gapsz = intervening bits, if bitsz bits not stored contiguously
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* (padsz = pad bits at end [TIE regfile] or at msbits [ur,sr] of asize)
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* reset = register reset value (or 0 if undefined at reset)
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* x = reserved for future use (0 until then)
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*
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* To filter out certain registers, e.g. to expand only the non-global
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* registers used by the compiler, you can do something like this:
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*
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* #define XCHAL_SA_REG(s,ccused,p...) SELCC##ccused(p)
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* #define SELCC0(p...)
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* #define SELCC1(abikind,p...) SELAK##abikind(p)
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* #define SELAK0(p...) REG(p)
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* #define SELAK1(p...) REG(p)
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* #define SELAK2(p...)
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* #define REG(kind,tie,name,galn,aln,asz,csz,dbnum,base,rnum,bsz,rst,x...) \
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* ...what you want to expand...
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*/
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#define XCHAL_NCP_SA_NUM 8
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#define XCHAL_NCP_SA_LIST(s) \
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XCHAL_SA_REG(s,1,0,0,1, acclo, 4, 4, 4,0x0210, sr,16 , 32,0,0,0) \
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XCHAL_SA_REG(s,1,0,0,1, acchi, 4, 4, 4,0x0211, sr,17 , 8,0,0,0) \
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XCHAL_SA_REG(s,0,0,0,1, m0, 4, 4, 4,0x0220, sr,32 , 32,0,0,0) \
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XCHAL_SA_REG(s,0,0,0,1, m1, 4, 4, 4,0x0221, sr,33 , 32,0,0,0) \
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XCHAL_SA_REG(s,0,0,0,1, m2, 4, 4, 4,0x0222, sr,34 , 32,0,0,0) \
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XCHAL_SA_REG(s,0,0,0,1, m3, 4, 4, 4,0x0223, sr,35 , 32,0,0,0) \
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XCHAL_SA_REG(s,0,0,0,1, scompare1, 4, 4, 4,0x020C, sr,12 , 32,0,0,0) \
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XCHAL_SA_REG(s,1,2,1,1, threadptr, 4, 4, 4,0x03E7, ur,231, 32,0,0,0)
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#define XCHAL_CP0_SA_NUM 0
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#define XCHAL_CP0_SA_LIST(s) /* empty */
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#define XCHAL_CP1_SA_NUM 0
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#define XCHAL_CP1_SA_LIST(s) /* empty */
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#define XCHAL_CP2_SA_NUM 0
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#define XCHAL_CP2_SA_LIST(s) /* empty */
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#define XCHAL_CP3_SA_NUM 0
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#define XCHAL_CP3_SA_LIST(s) /* empty */
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#define XCHAL_CP4_SA_NUM 0
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#define XCHAL_CP4_SA_LIST(s) /* empty */
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#define XCHAL_CP5_SA_NUM 0
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#define XCHAL_CP5_SA_LIST(s) /* empty */
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#define XCHAL_CP6_SA_NUM 0
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#define XCHAL_CP6_SA_LIST(s) /* empty */
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#define XCHAL_CP7_SA_NUM 0
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#define XCHAL_CP7_SA_LIST(s) /* empty */
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/* Byte length of instruction from its first nibble (op0 field), per FLIX. */
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#define XCHAL_OP0_FORMAT_LENGTHS 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3
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#endif /*_XTENSA_CORE_TIE_H*/
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