release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/staging/tidspbridge/dynload/dload_internal.h

   1 /*
   2  * dload_internal.h
   3  *
   4  * DSP-BIOS Bridge driver support functions for TI OMAP processors.
   5  *
   6  * Copyright (C) 2005-2006 Texas Instruments, Inc.
   7  *
   8  * This package is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  13  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  14  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  15  */
  16
  17 #ifndef _DLOAD_INTERNAL_
  18 #define _DLOAD_INTERNAL_
  19
  20 #include <linux/types.h>
  21
  22 /*
  23  * Internal state definitions for the dynamic loader
  24  */
  25
  26 /* type used for relocation intermediate results */
  27 typedef s32 rvalue;
  28
  29 /* unsigned version of same; must have at least as many bits */
  30 typedef u32 urvalue;
  31
  32 /*
  33  * Dynamic loader configuration constants
  34  */
  35 /* error issued if input has more sections than this limit */
  36 #define REASONABLE_SECTION_LIMIT 100
  37
  38 /* (Addressable unit) value used to clear BSS section */
  39 #define DLOAD_FILL_BSS 0
  40
  41 /*
  42  * Reorder maps explained (?)
  43  *
  44  * The doff file format defines a 32-bit pattern used to determine the
  45  * byte order of an image being read.  That value is
  46  * BYTE_RESHUFFLE_VALUE == 0x00010203
  47  * For purposes of the reorder routine, we would rather have the all-is-OK
  48  * for 32-bits pattern be 0x03020100.  This first macro makes the
  49  * translation from doff file header value to MAP value: */
  50 #define REORDER_MAP(rawmap) ((rawmap) ^ 0x3030303)
  51 /* This translation is made in dload_headers.  Thereafter, the all-is-OK
  52  * value for the maps stored in dlthis is REORDER_MAP(BYTE_RESHUFFLE_VALUE).
  53  * But sadly, not all bits of the doff file are 32-bit integers.
  54  * The notable exceptions are strings and image bits.
  55  * Strings obey host byte order: */
  56 #if defined(_BIG_ENDIAN)
  57 #define HOST_BYTE_ORDER(cookedmap) ((cookedmap) ^ 0x3030303)
  58 #else
  59 #define HOST_BYTE_ORDER(cookedmap) (cookedmap)
  60 #endif
  61 /* Target bits consist of target AUs (could be bytes, or 16-bits,
  62  * or 32-bits) stored as an array in host order.  A target order
  63  * map is defined by: */
  64 #if !defined(_BIG_ENDIAN) || TARGET_AU_BITS > 16
  65 #define TARGET_ORDER(cookedmap) (cookedmap)
  66 #elif TARGET_AU_BITS > 8
  67 #define TARGET_ORDER(cookedmap) ((cookedmap) ^ 0x2020202)
  68 #else
  69 #define TARGET_ORDER(cookedmap) ((cookedmap) ^ 0x3030303)
  70 #endif
  71
  72 /* forward declaration for handle returned by dynamic loader */
  73 struct my_handle;
  74
  75 /*
  76  * a list of module handles, which mirrors the debug list on the target
  77  */
  78 struct dbg_mirror_root {
  79         /* must be same as dbg_mirror_list; __DLModules address on target */
  80         u32 dbthis;
  81         struct my_handle *hnext;        /* must be same as dbg_mirror_list */
  82         u16 changes;            /* change counter */
  83         u16 refcount;           /* number of modules referencing this root */
  84 };
  85
  86 struct dbg_mirror_list {
  87         u32 dbthis;
  88         struct my_handle *hnext, *hprev;
  89         struct dbg_mirror_root *hroot;
  90         u16 dbsiz;
  91         u32 context;    /* Save context for .dllview memory allocation */
  92 };
  93
  94 #define VARIABLE_SIZE 1
  95 /*
  96  * the structure we actually return as an opaque module handle
  97  */
  98 struct my_handle {
  99         struct dbg_mirror_list dm;      /* !!! must be first !!! */
 100         /* sections following << 1, LSB is set for big-endian target */
 101         u16 secn_count;
 102         struct ldr_section_info secns[VARIABLE_SIZE];
 103 };
 104 #define MY_HANDLE_SIZE (sizeof(struct my_handle) -\
 105                         sizeof(struct ldr_section_info))
 106 /* real size of my_handle */
 107
 108 /*
 109  * reduced symbol structure used for symbols during relocation
 110  */
 111 struct local_symbol {
 112         s32 value;              /* Relocated symbol value */
 113         s32 delta;              /* Original value in input file */
 114         s16 secnn;              /* section number */
 115         s16 sclass;             /* symbol class */
 116 };
 117
 118 /*
 119  * Trampoline data structures
 120  */
 121 #define TRAMP_NO_GEN_AVAIL              65535
 122 #define TRAMP_SYM_PREFIX                "__$dbTR__"
 123 #define TRAMP_SECT_NAME                 ".dbTR"
 124 /* MUST MATCH THE LENGTH ABOVE!! */
 125 #define TRAMP_SYM_PREFIX_LEN            9
 126 /* Includes NULL termination */
 127 #define TRAMP_SYM_HEX_ASCII_LEN         9
 128
 129 #define GET_CONTAINER(ptr, type, field) ((type *)((unsigned long)ptr -\
 130                                 (unsigned long)(&((type *)0)->field)))
 131 #ifndef FIELD_OFFSET
 132 #define FIELD_OFFSET(type, field)       ((unsigned long)(&((type *)0)->field))
 133 #endif
 134
 135 /*
 136     The trampoline code for the target is located in a table called
 137     "tramp_gen_info" with is indexed by looking up the index in the table
 138     "tramp_map".  The tramp_map index is acquired using the target
 139     HASH_FUNC on the relocation type that caused the trampoline.  Each
 140     trampoline code table entry MUST follow this format:
 141
 142     |----------------------------------------------|
 143     |  tramp_gen_code_hdr                          |
 144     |----------------------------------------------|
 145     |  Trampoline image code                       |
 146     |  (the raw instruction code for the target)   |
 147     |----------------------------------------------|
 148     |  Relocation entries for the image code       |
 149     |----------------------------------------------|
 150
 151     This is very similar to how image data is laid out in the DOFF file
 152     itself.
 153  */
 154 struct tramp_gen_code_hdr {
 155         u32 tramp_code_size;    /*  in BYTES */
 156         u32 num_relos;
 157         u32 relo_offset;        /*  in BYTES */
 158 };
 159
 160 struct tramp_img_pkt {
 161         struct tramp_img_pkt *next;     /*  MUST BE FIRST */
 162         u32 base;
 163         struct tramp_gen_code_hdr hdr;
 164         u8 payload[VARIABLE_SIZE];
 165 };
 166
 167 struct tramp_img_dup_relo {
 168         struct tramp_img_dup_relo *next;
 169         struct reloc_record_t relo;
 170 };
 171
 172 struct tramp_img_dup_pkt {
 173         struct tramp_img_dup_pkt *next; /*  MUST BE FIRST */
 174         s16 secnn;
 175         u32 offset;
 176         struct image_packet_t img_pkt;
 177         struct tramp_img_dup_relo *relo_chain;
 178
 179         /*  PAYLOAD OF IMG PKT FOLLOWS */
 180 };
 181
 182 struct tramp_sym {
 183         struct tramp_sym *next; /*  MUST BE FIRST */
 184         u32 index;
 185         u32 str_index;
 186         struct local_symbol sym_info;
 187 };
 188
 189 struct tramp_string {
 190         struct tramp_string *next;      /*  MUST BE FIRST */
 191         u32 index;
 192         char str[VARIABLE_SIZE];        /*  NULL terminated */
 193 };
 194
 195 struct tramp_info {
 196         u32 tramp_sect_next_addr;
 197         struct ldr_section_info sect_info;
 198
 199         struct tramp_sym *symbol_head;
 200         struct tramp_sym *symbol_tail;
 201         u32 tramp_sym_next_index;
 202         struct local_symbol *final_sym_table;
 203
 204         struct tramp_string *string_head;
 205         struct tramp_string *string_tail;
 206         u32 tramp_string_next_index;
 207         u32 tramp_string_size;
 208         char *final_string_table;
 209
 210         struct tramp_img_pkt *tramp_pkts;
 211         struct tramp_img_dup_pkt *dup_pkts;
 212 };
 213
 214 /*
 215  * States of the .cinit state machine
 216  */
 217 enum cinit_mode {
 218         CI_COUNT = 0,           /* expecting a count */
 219         CI_ADDRESS,             /* expecting an address */
 220 #if CINIT_ALIGN < CINIT_ADDRESS     /* handle case of partial address field */
 221         CI_PARTADDRESS,         /* have only part of the address */
 222 #endif
 223         CI_COPY,                /* in the middle of copying data */
 224         CI_DONE                 /* end of .cinit table */
 225 };
 226
 227 /*
 228  * The internal state of the dynamic loader, which is passed around as
 229  * an object
 230  */
 231 struct dload_state {
 232         struct dynamic_loader_stream *strm;     /* The module input stream */
 233         struct dynamic_loader_sym *mysym;       /* Symbols for this session */
 234         /* target memory allocator */
 235         struct dynamic_loader_allocate *myalloc;
 236         struct dynamic_loader_initialize *myio; /* target memory initializer */
 237         unsigned myoptions;     /* Options parameter dynamic_load_module */
 238
 239         char *str_head;         /* Pointer to string table */
 240 #if BITS_PER_AU > BITS_PER_BYTE
 241         char *str_temp;         /* Pointer to temporary buffer for strings */
 242         /* big enough to hold longest string */
 243         unsigned temp_len;      /* length of last temporary string */
 244         char *xstrings;         /* Pointer to buffer for expanded */
 245         /* strings for sec names */
 246 #endif
 247         /* Total size of strings for DLLView section names */
 248         unsigned debug_string_size;
 249         /* Pointer to parallel section info for allocated sections only */
 250         struct doff_scnhdr_t *sect_hdrs;        /* Pointer to section table */
 251         struct ldr_section_info *ldr_sections;
 252 #if TMS32060
 253         /* The address of the start of the .bss section */
 254         ldr_addr bss_run_base;
 255 #endif
 256         struct local_symbol *local_symtab;      /* Relocation symbol table */
 257
 258         /* pointer to DL section info for the section being relocated */
 259         struct ldr_section_info *image_secn;
 260         /* change in run address for current section during relocation */
 261         ldr_addr delta_runaddr;
 262         ldr_addr image_offset;  /* offset of current packet in section */
 263         enum cinit_mode cinit_state;    /* current state of cload_cinit() */
 264         int cinit_count;        /* the current count */
 265         ldr_addr cinit_addr;    /* the current address */
 266         s16 cinit_page;         /* the current page */
 267         /* Handle to be returned by dynamic_load_module */
 268         struct my_handle *myhandle;
 269         unsigned dload_errcount;        /* Total # of errors reported so far */
 270         /* Number of target sections that require allocation and relocation */
 271         unsigned allocated_secn_count;
 272 #ifndef TARGET_ENDIANNESS
 273         int big_e_target;       /* Target data in big-endian format */
 274 #endif
 275         /* map for reordering bytes, 0 if not needed */
 276         u32 reorder_map;
 277         struct doff_filehdr_t dfile_hdr;        /* DOFF file header structure */
 278         struct doff_verify_rec_t verify;        /* Verify record */
 279
 280         struct tramp_info tramp;        /* Trampoline data, if needed */
 281
 282         int relstkidx;          /* index into relocation value stack */
 283         /* relocation value stack used in relexp.c */
 284         rvalue relstk[STATIC_EXPR_STK_SIZE];
 285
 286 };
 287
 288 #ifdef TARGET_ENDIANNESS
 289 #define TARGET_BIG_ENDIAN TARGET_ENDIANNESS
 290 #else
 291 #define TARGET_BIG_ENDIAN (dlthis->big_e_target)
 292 #endif
 293
 294 /*
 295  * Exports from cload.c to rest of the world
 296  */
 297 extern void dload_error(struct dload_state *dlthis, const char *errtxt, ...);
 298 extern void dload_syms_error(struct dynamic_loader_sym *syms,
 299                              const char *errtxt, ...);
 300 extern void dload_headers(struct dload_state *dlthis);
 301 extern void dload_strings(struct dload_state *dlthis, bool sec_names_only);
 302 extern void dload_sections(struct dload_state *dlthis);
 303 extern void dload_reorder(void *data, int dsiz, u32 map);
 304 extern u32 dload_checksum(void *data, unsigned siz);
 305
 306 #if HOST_ENDIANNESS
 307 extern uint32_t dload_reverse_checksum(void *data, unsigned siz);
 308 #if (TARGET_AU_BITS > 8) && (TARGET_AU_BITS < 32)
 309 extern uint32_t dload_reverse_checksum16(void *data, unsigned siz);
 310 #endif
 311 #endif
 312
 313 /*
 314  * exported by reloc.c
 315  */
 316 extern void dload_relocate(struct dload_state *dlthis, tgt_au_t * data,
 317                            struct reloc_record_t *rp, bool * tramps_generated,
 318                            bool second_pass);
 319
 320 extern rvalue dload_unpack(struct dload_state *dlthis, tgt_au_t * data,
 321                            int fieldsz, int offset, unsigned sgn);
 322
 323 extern int dload_repack(struct dload_state *dlthis, rvalue val, tgt_au_t * data,
 324                         int fieldsz, int offset, unsigned sgn);
 325
 326 /*
 327  * exported by tramp.c
 328  */
 329 extern bool dload_tramp_avail(struct dload_state *dlthis,
 330                               struct reloc_record_t *rp);
 331
 332 int dload_tramp_generate(struct dload_state *dlthis, s16 secnn,
 333                          u32 image_offset, struct image_packet_t *ipacket,
 334                          struct reloc_record_t *rp);
 335
 336 extern int dload_tramp_pkt_udpate(struct dload_state *dlthis,
 337                                   s16 secnn, u32 image_offset,
 338                                   struct image_packet_t *ipacket);
 339
 340 extern int dload_tramp_finalize(struct dload_state *dlthis);
 341
 342 extern void dload_tramp_cleanup(struct dload_state *dlthis);
 343
 344 #endif /* _DLOAD_INTERNAL_ */