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/*
* tramp_table_c6000.c
*
* 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.
*/
#include "dload_internal.h"
/* These are defined in coff.h, but may not be available on all platforms
so we'll go ahead and define them here. */
#ifndef R_C60LO16
#define R_C60LO16 0x54 /* C60: MVK Low Half Register */
#define R_C60HI16 0x55 /* C60: MVKH/MVKLH High Half Register */
#endif
#define C6X_TRAMP_WORD_COUNT 8
#define C6X_TRAMP_MAX_RELOS 8
/* THIS HASH FUNCTION MUST MATCH THE ONE reloc_table_c6000.c */
#define HASH_FUNC(zz) (((((zz) + 1) * 1845UL) >> 11) & 63)
/* THIS MUST MATCH reloc_record_t FOR A SYMBOL BASED RELO */
struct c6000_relo_record {
s32 vaddr;
s32 symndx;
#ifndef _BIG_ENDIAN
u16 disp;
u16 type;
#else
u16 type;
u16 disp;
#endif
};
struct c6000_gen_code {
struct tramp_gen_code_hdr hdr;
u32 tramp_instrs[C6X_TRAMP_WORD_COUNT];
struct c6000_relo_record relos[C6X_TRAMP_MAX_RELOS];
};
/* Hash mapping for relos that can cause trampolines. */
static const u16 tramp_map[] = {
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
0,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535,
65535
};
static const struct c6000_gen_code tramp_gen_info[] = {
/* Tramp caused by R_C60PCR21 */
{
/* Header - 8 instructions, 2 relos */
{
sizeof(u32) * C6X_TRAMP_WORD_COUNT,
2,
FIELD_OFFSET(struct c6000_gen_code, relos)
},
/* Trampoline instructions */
{
0x053C54F7, /* STW.D2T2 B10, *sp--[2] */
0x0500002A, /* || MVK.S2 <blank>, B10 */
0x0500006A, /* MVKH.S2 <blank>, B10 */
0x00280362, /* B.S2 B10 */
0x053C52E6, /* LDW.D2T2 *++sp[2], B10 */
0x00006000, /* NOP 4 */
0x00000000, /* NOP */
0x00000000 /* NOP */
},
/* Relocations */
{
{4, 0, 0, R_C60LO16},
{8, 0, 0, R_C60HI16},
{0, 0, 0, 0x0000},
{0, 0, 0, 0x0000},
{0, 0, 0, 0x0000},
{0, 0, 0, 0x0000},
{0, 0, 0, 0x0000},
{0, 0, 0, 0x0000}
}
}
};
/* TARGET SPECIFIC FUNCTIONS THAT MUST BE DEFINED */
static u32 tramp_size_get(void)
{
return sizeof(u32) * C6X_TRAMP_WORD_COUNT;
}
static u32 tramp_img_pkt_size_get(void)
{
return sizeof(struct c6000_gen_code);
}
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