reloc_table.h

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/*
 * reloc_table.h
 *
 * DSP-BIOS Bridge driver support functions for TI OMAP processors.
 *
 * Copyright (C) 2005-2006 Texas Instruments, Inc.
 *
 * This package is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef _RELOC_TABLE_H_
#define _RELOC_TABLE_H_
/*
 * Table of relocation operator properties
 */
#include <linux/types.h>

/* How does this relocation operation access the program image? */
#define ROP_N   0       /* does not access image */
#define ROP_R   1       /* read from image */
#define ROP_W   2       /* write to image */
#define ROP_RW  3       /* read from and write to image */

/* For program image access, what are the overflow rules for the bit field? */
/* Beware! Procedure repack depends on this encoding */
#define ROP_ANY 0       /* no overflow ever, just truncate the value */
#define ROP_SGN 1       /* signed field */
#define ROP_UNS 2       /* unsigned field */
#define ROP_MAX 3   /* allow maximum range of either signed or unsigned */

/* How does the relocation operation use the symbol reference */
#define ROP_IGN 0       /* no symbol is referenced */
#define ROP_LIT 0       /* use rp->UVAL literal field */
#define ROP_SYM 1       /* symbol value is used in relocation */
#define ROP_SYMD 2      /* delta value vs last link is used */

/* How does the reloc op use the stack? */
#define RSTK_N 0        /* Does not use */
#define RSTK_POP 1      /* Does a POP */
#define RSTK_UOP 2      /* Unary op, stack position unaffected */
#define RSTK_PSH 3      /* Does a push */

/*
 * Computational actions performed by the dynamic loader
 */
enum dload_actions {
    /* don't alter the current val (from stack or mem fetch) */
    RACT_VAL,
    /* set value to reference amount (from symbol reference) */
    RACT_ASGN,
    RACT_ADD,       /* add reference to value */
    RACT_PCR,       /* add reference minus PC delta to value */
    RACT_ADDISP,        /* add reference plus R_DISP */
    RACT_ASGPC,     /* set value to section addr plus reference */

    RACT_PLUS,      /* stack + */
    RACT_SUB,       /* stack - */
    RACT_NEG,       /* stack unary - */

    RACT_MPY,       /* stack * */
    RACT_DIV,       /* stack / */
    RACT_MOD,       /* stack % */

    RACT_SR,        /* stack unsigned >> */
    RACT_ASR,       /* stack signed >> */
    RACT_SL,        /* stack << */
    RACT_AND,       /* stack & */
    RACT_OR,        /* stack | */
    RACT_XOR,       /* stack ^ */
    RACT_NOT,       /* stack ~ */
    RACT_C6SECT,        /* for C60 R_SECT op */
    RACT_C6BASE,        /* for C60 R_BASE op */
    RACT_C6DSPL,        /* for C60 scaled 15-bit displacement */
    RACT_PCR23T     /* for ARM Thumb long branch */
};

/*
 * macros used to extract values
 */
#define RFV_POSN(aaa) ((aaa) & 0xF)
#define RFV_WIDTH(aaa) (((aaa) >> 4) & 0x3F)
#define RFV_ACTION(aaa) ((aaa) >> 10)

#define RFV_SIGN(iii) (((iii) >> 2) & 0x3)
#define RFV_SYM(iii) (((iii) >> 4) & 0x3)
#define RFV_STK(iii) (((iii) >> 6) & 0x3)
#define RFV_ACCS(iii) ((iii) & 0x3)

#if (TMS32060)
#define RFV_SCALE(iii) ((iii) >> 11)
#define RFV_BIGOFF(iii) (((iii) >> 8) & 0x7)
#else
#define RFV_BIGOFF(iii) ((iii) >> 8)
#endif

#endif /* _RELOC_TABLE_H_ */