4 * DSP-BIOS Bridge driver support functions for TI OMAP processors.
6 * This module implements DSP code management for the DSP/BIOS Bridge
7 * environment. It is mostly a thin wrapper.
9 * This module provides an interface for loading both static and
10 * dynamic code objects onto DSP systems.
12 * Copyright (C) 2005-2006 Texas Instruments, Inc.
14 * This package is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
18 * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
20 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
23 #include <linux/types.h>
25 /* ----------------------------------- Host OS */
26 #include <dspbridge/host_os.h>
28 #include <linux/uaccess.h>
30 /* ----------------------------------- DSP/BIOS Bridge */
31 #include <dspbridge/dbdefs.h>
33 /* ----------------------------------- Trace & Debug */
34 #include <dspbridge/dbc.h>
36 /* ----------------------------------- Platform Manager */
37 /* Include appropriate loader header file */
38 #include <dspbridge/dbll.h>
40 /* ----------------------------------- This */
41 #include <dspbridge/cod.h>
44 * ======== cod_manager ========
47 struct dbll_tar_obj *target;
48 struct dbll_library_obj *base_lib;
49 bool loaded; /* Base library loaded? */
51 struct dbll_fxns fxns;
52 struct dbll_attrs attrs;
53 char sz_zl_file[COD_MAXPATHLENGTH];
57 * ======== cod_libraryobj ========
59 struct cod_libraryobj {
60 struct dbll_library_obj *dbll_lib;
61 struct cod_manager *cod_mgr;
66 static struct dbll_fxns ldr_fxns = {
67 (dbll_close_fxn) dbll_close,
68 (dbll_create_fxn) dbll_create,
69 (dbll_delete_fxn) dbll_delete,
70 (dbll_exit_fxn) dbll_exit,
71 (dbll_get_attrs_fxn) dbll_get_attrs,
72 (dbll_get_addr_fxn) dbll_get_addr,
73 (dbll_get_c_addr_fxn) dbll_get_c_addr,
74 (dbll_get_sect_fxn) dbll_get_sect,
75 (dbll_init_fxn) dbll_init,
76 (dbll_load_fxn) dbll_load,
77 (dbll_open_fxn) dbll_open,
78 (dbll_read_sect_fxn) dbll_read_sect,
79 (dbll_unload_fxn) dbll_unload,
82 static bool no_op(void);
85 * File operations (originally were under kfile.c)
87 static s32 cod_f_close(struct file *filp)
89 /* Check for valid handle */
93 filp_close(filp, NULL);
95 /* we can't use 0 here */
99 static struct file *cod_f_open(const char *psz_file_name, const char *sz_mode)
107 /* ignore given mode and open file as read-only */
108 filp = filp_open(psz_file_name, O_RDONLY, 0);
118 static s32 cod_f_read(void __user *pbuffer, s32 size, s32 count,
121 /* check for valid file handle */
125 if ((size > 0) && (count > 0) && pbuffer) {
132 dw_bytes_read = filp->f_op->read(filp, pbuffer, size * count,
139 return dw_bytes_read / size;
145 static s32 cod_f_seek(struct file *filp, s32 offset, s32 origin)
149 /* check for valid file handle */
153 /* based on the origin flag, move the internal pointer */
154 dw_cur_pos = filp->f_op->llseek(filp, offset, origin);
156 if ((s32) dw_cur_pos < 0)
159 /* we can't use 0 here */
163 static s32 cod_f_tell(struct file *filp)
170 /* Get current position */
171 dw_cur_pos = filp->f_op->llseek(filp, 0, SEEK_CUR);
173 if ((s32) dw_cur_pos < 0)
180 * ======== cod_close ========
182 void cod_close(struct cod_libraryobj *lib)
184 struct cod_manager *hmgr;
186 DBC_REQUIRE(refs > 0);
187 DBC_REQUIRE(lib != NULL);
188 DBC_REQUIRE(lib->cod_mgr);
191 hmgr->fxns.close_fxn(lib->dbll_lib);
197 * ======== cod_create ========
199 * Create an object to manage code on a DSP system.
200 * This object can be used to load an initial program image with
201 * arguments that can later be expanded with
202 * dynamically loaded object files.
205 int cod_create(struct cod_manager **mgr, char *str_zl_file)
207 struct cod_manager *mgr_new;
208 struct dbll_attrs zl_attrs;
211 DBC_REQUIRE(refs > 0);
212 DBC_REQUIRE(mgr != NULL);
217 mgr_new = kzalloc(sizeof(struct cod_manager), GFP_KERNEL);
221 /* Set up loader functions */
222 mgr_new->fxns = ldr_fxns;
224 /* initialize the ZL module */
225 mgr_new->fxns.init_fxn();
227 zl_attrs.alloc = (dbll_alloc_fxn) no_op;
228 zl_attrs.free = (dbll_free_fxn) no_op;
229 zl_attrs.fread = (dbll_read_fxn) cod_f_read;
230 zl_attrs.fseek = (dbll_seek_fxn) cod_f_seek;
231 zl_attrs.ftell = (dbll_tell_fxn) cod_f_tell;
232 zl_attrs.fclose = (dbll_f_close_fxn) cod_f_close;
233 zl_attrs.fopen = (dbll_f_open_fxn) cod_f_open;
234 zl_attrs.sym_lookup = NULL;
235 zl_attrs.base_image = true;
236 zl_attrs.log_write = NULL;
237 zl_attrs.log_write_handle = NULL;
238 zl_attrs.write = NULL;
239 zl_attrs.rmm_handle = NULL;
240 zl_attrs.input_params = NULL;
241 zl_attrs.sym_handle = NULL;
242 zl_attrs.sym_arg = NULL;
244 mgr_new->attrs = zl_attrs;
246 status = mgr_new->fxns.create_fxn(&mgr_new->target, &zl_attrs);
253 /* return the new manager */
260 * ======== cod_delete ========
262 * Delete a code manager object.
264 void cod_delete(struct cod_manager *cod_mgr_obj)
266 DBC_REQUIRE(refs > 0);
267 DBC_REQUIRE(cod_mgr_obj);
269 if (cod_mgr_obj->base_lib) {
270 if (cod_mgr_obj->loaded)
271 cod_mgr_obj->fxns.unload_fxn(cod_mgr_obj->base_lib,
272 &cod_mgr_obj->attrs);
274 cod_mgr_obj->fxns.close_fxn(cod_mgr_obj->base_lib);
276 if (cod_mgr_obj->target) {
277 cod_mgr_obj->fxns.delete_fxn(cod_mgr_obj->target);
278 cod_mgr_obj->fxns.exit_fxn();
284 * ======== cod_exit ========
286 * Discontinue usage of the COD module.
291 DBC_REQUIRE(refs > 0);
295 DBC_ENSURE(refs >= 0);
299 * ======== cod_get_base_lib ========
301 * Get handle to the base image DBL library.
303 int cod_get_base_lib(struct cod_manager *cod_mgr_obj,
304 struct dbll_library_obj **plib)
308 DBC_REQUIRE(refs > 0);
309 DBC_REQUIRE(cod_mgr_obj);
310 DBC_REQUIRE(plib != NULL);
312 *plib = (struct dbll_library_obj *)cod_mgr_obj->base_lib;
318 * ======== cod_get_base_name ========
320 int cod_get_base_name(struct cod_manager *cod_mgr_obj, char *sz_name,
325 DBC_REQUIRE(refs > 0);
326 DBC_REQUIRE(cod_mgr_obj);
327 DBC_REQUIRE(sz_name != NULL);
329 if (usize <= COD_MAXPATHLENGTH)
330 strncpy(sz_name, cod_mgr_obj->sz_zl_file, usize);
338 * ======== cod_get_entry ========
340 * Retrieve the entry point of a loaded DSP program image
343 int cod_get_entry(struct cod_manager *cod_mgr_obj, u32 *entry_pt)
345 DBC_REQUIRE(refs > 0);
346 DBC_REQUIRE(cod_mgr_obj);
347 DBC_REQUIRE(entry_pt != NULL);
349 *entry_pt = cod_mgr_obj->entry;
355 * ======== cod_get_loader ========
357 * Get handle to the DBLL loader.
359 int cod_get_loader(struct cod_manager *cod_mgr_obj,
360 struct dbll_tar_obj **loader)
364 DBC_REQUIRE(refs > 0);
365 DBC_REQUIRE(cod_mgr_obj);
366 DBC_REQUIRE(loader != NULL);
368 *loader = (struct dbll_tar_obj *)cod_mgr_obj->target;
374 * ======== cod_get_section ========
376 * Retrieve the starting address and length of a section in the COFF file
377 * given the section name.
379 int cod_get_section(struct cod_libraryobj *lib, char *str_sect,
382 struct cod_manager *cod_mgr_obj;
385 DBC_REQUIRE(refs > 0);
386 DBC_REQUIRE(lib != NULL);
387 DBC_REQUIRE(lib->cod_mgr);
388 DBC_REQUIRE(str_sect != NULL);
389 DBC_REQUIRE(addr != NULL);
390 DBC_REQUIRE(len != NULL);
395 cod_mgr_obj = lib->cod_mgr;
396 status = cod_mgr_obj->fxns.get_sect_fxn(lib->dbll_lib, str_sect,
402 DBC_ENSURE(!status || ((*addr == 0) && (*len == 0)));
408 * ======== cod_get_sym_value ========
410 * Retrieve the value for the specified symbol. The symbol is first
411 * searched for literally and then, if not found, searched for as a
415 int cod_get_sym_value(struct cod_manager *cod_mgr_obj, char *str_sym,
418 struct dbll_sym_val *dbll_sym;
420 DBC_REQUIRE(refs > 0);
421 DBC_REQUIRE(cod_mgr_obj);
422 DBC_REQUIRE(str_sym != NULL);
423 DBC_REQUIRE(pul_value != NULL);
425 dev_dbg(bridge, "%s: cod_mgr_obj: %p str_sym: %s pul_value: %p\n",
426 __func__, cod_mgr_obj, str_sym, pul_value);
427 if (cod_mgr_obj->base_lib) {
428 if (!cod_mgr_obj->fxns.
429 get_addr_fxn(cod_mgr_obj->base_lib, str_sym, &dbll_sym)) {
430 if (!cod_mgr_obj->fxns.
431 get_c_addr_fxn(cod_mgr_obj->base_lib, str_sym,
439 *pul_value = dbll_sym->value;
445 * ======== cod_init ========
447 * Initialize the COD module's private state.
454 DBC_REQUIRE(refs >= 0);
459 DBC_ENSURE((ret && refs > 0) || (!ret && refs >= 0));
464 * ======== cod_load_base ========
466 * Load the initial program image, optionally with command-line arguments,
467 * on the DSP system managed by the supplied handle. The program to be
468 * loaded must be the first element of the args array and must be a fully
469 * qualified pathname.
471 * if num_argc doesn't match the number of arguments in the args array, the
472 * args array is searched for a NULL terminating entry, and argc is
473 * recalculated to reflect this. In this way, we can support NULL
474 * terminating args arrays, if num_argc is very large.
476 int cod_load_base(struct cod_manager *cod_mgr_obj, u32 num_argc, char *args[],
477 cod_writefxn pfn_write, void *arb, char *envp[])
480 struct dbll_attrs save_attrs;
481 struct dbll_attrs new_attrs;
485 DBC_REQUIRE(refs > 0);
486 DBC_REQUIRE(cod_mgr_obj);
487 DBC_REQUIRE(num_argc > 0);
488 DBC_REQUIRE(args != NULL);
489 DBC_REQUIRE(args[0] != NULL);
490 DBC_REQUIRE(pfn_write != NULL);
491 DBC_REQUIRE(cod_mgr_obj->base_lib != NULL);
494 * Make sure every argv[] stated in argc has a value, or change argc to
495 * reflect true number in NULL terminated argv array.
497 for (i = 0; i < num_argc; i++) {
498 if (args[i] == NULL) {
504 /* set the write function for this operation */
505 cod_mgr_obj->fxns.get_attrs_fxn(cod_mgr_obj->target, &save_attrs);
507 new_attrs = save_attrs;
508 new_attrs.write = (dbll_write_fxn) pfn_write;
509 new_attrs.input_params = arb;
510 new_attrs.alloc = (dbll_alloc_fxn) no_op;
511 new_attrs.free = (dbll_free_fxn) no_op;
512 new_attrs.log_write = NULL;
513 new_attrs.log_write_handle = NULL;
516 flags = DBLL_CODE | DBLL_DATA | DBLL_SYMB;
517 status = cod_mgr_obj->fxns.load_fxn(cod_mgr_obj->base_lib, flags,
519 &cod_mgr_obj->entry);
521 cod_mgr_obj->fxns.close_fxn(cod_mgr_obj->base_lib);
524 cod_mgr_obj->loaded = true;
526 cod_mgr_obj->base_lib = NULL;
532 * ======== cod_open ========
533 * Open library for reading sections.
535 int cod_open(struct cod_manager *hmgr, char *sz_coff_path,
536 u32 flags, struct cod_libraryobj **lib_obj)
539 struct cod_libraryobj *lib = NULL;
541 DBC_REQUIRE(refs > 0);
543 DBC_REQUIRE(sz_coff_path != NULL);
544 DBC_REQUIRE(flags == COD_NOLOAD || flags == COD_SYMB);
545 DBC_REQUIRE(lib_obj != NULL);
549 lib = kzalloc(sizeof(struct cod_libraryobj), GFP_KERNEL);
555 status = hmgr->fxns.open_fxn(hmgr->target, sz_coff_path, flags,
562 pr_err("%s: error status 0x%x, sz_coff_path: %s flags: 0x%x\n",
563 __func__, status, sz_coff_path, flags);
568 * ======== cod_open_base ========
570 * Open base image for reading sections.
572 int cod_open_base(struct cod_manager *hmgr, char *sz_coff_path,
576 struct dbll_library_obj *lib;
578 DBC_REQUIRE(refs > 0);
580 DBC_REQUIRE(sz_coff_path != NULL);
582 /* if we previously opened a base image, close it now */
583 if (hmgr->base_lib) {
585 hmgr->fxns.unload_fxn(hmgr->base_lib, &hmgr->attrs);
586 hmgr->loaded = false;
588 hmgr->fxns.close_fxn(hmgr->base_lib);
589 hmgr->base_lib = NULL;
591 status = hmgr->fxns.open_fxn(hmgr->target, sz_coff_path, flags, &lib);
593 /* hang onto the library for subsequent sym table usage */
594 hmgr->base_lib = lib;
595 strncpy(hmgr->sz_zl_file, sz_coff_path, COD_MAXPATHLENGTH - 1);
596 hmgr->sz_zl_file[COD_MAXPATHLENGTH - 1] = '\0';
600 pr_err("%s: error status 0x%x sz_coff_path: %s\n", __func__,
601 status, sz_coff_path);
606 * ======== cod_read_section ========
608 * Retrieve the content of a code section given the section name.
610 int cod_read_section(struct cod_libraryobj *lib, char *str_sect,
611 char *str_content, u32 content_size)
615 DBC_REQUIRE(refs > 0);
616 DBC_REQUIRE(lib != NULL);
617 DBC_REQUIRE(lib->cod_mgr);
618 DBC_REQUIRE(str_sect != NULL);
619 DBC_REQUIRE(str_content != NULL);
623 lib->cod_mgr->fxns.read_sect_fxn(lib->dbll_lib, str_sect,
624 str_content, content_size);
632 * ======== no_op ========
637 static bool no_op(void)