4 * DSP-BIOS Bridge driver support functions for TI OMAP processors.
6 * Processor interface at the driver level.
8 * Copyright (C) 2005-2006 Texas Instruments, Inc.
10 * This package is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
14 * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
16 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
19 #include <linux/types.h>
20 /* ------------------------------------ Host OS */
21 #include <linux/dma-mapping.h>
22 #include <linux/scatterlist.h>
23 #include <dspbridge/host_os.h>
25 /* ----------------------------------- DSP/BIOS Bridge */
26 #include <dspbridge/dbdefs.h>
28 /* ----------------------------------- OS Adaptation Layer */
29 #include <dspbridge/ntfy.h>
30 #include <dspbridge/sync.h>
31 /* ----------------------------------- Bridge Driver */
32 #include <dspbridge/dspdefs.h>
33 #include <dspbridge/dspdeh.h>
34 /* ----------------------------------- Platform Manager */
35 #include <dspbridge/cod.h>
36 #include <dspbridge/dev.h>
37 #include <dspbridge/procpriv.h>
38 #include <dspbridge/dmm.h>
40 /* ----------------------------------- Resource Manager */
41 #include <dspbridge/mgr.h>
42 #include <dspbridge/node.h>
43 #include <dspbridge/nldr.h>
44 #include <dspbridge/rmm.h>
46 /* ----------------------------------- Others */
47 #include <dspbridge/dbdcd.h>
48 #include <dspbridge/msg.h>
49 #include <dspbridge/dspioctl.h>
50 #include <dspbridge/drv.h>
52 /* ----------------------------------- This */
53 #include <dspbridge/proc.h>
54 #include <dspbridge/pwr.h>
56 #include <dspbridge/resourcecleanup.h>
57 /* ----------------------------------- Defines, Data Structures, Typedefs */
58 #define MAXCMDLINELEN 255
59 #define PROC_ENVPROCID "PROC_ID=%d"
60 #define MAXPROCIDLEN (8 + 5)
61 #define PROC_DFLT_TIMEOUT 10000 /* Time out in milliseconds */
62 #define PWR_TIMEOUT 500 /* Sleep/wake timout in msec */
63 #define EXTEND "_EXT_END" /* Extmem end addr in DSP binary */
65 #define DSP_CACHE_LINE 128
67 #define BUFMODE_MASK (3 << 14)
69 /* Buffer modes from DSP perspective */
70 #define RBUF 0x4000 /* Input buffer */
71 #define WBUF 0x8000 /* Output Buffer */
73 extern struct device *bridge;
75 /* ----------------------------------- Globals */
77 /* The proc_object structure. */
79 struct list_head link; /* Link to next proc_object */
80 struct dev_object *dev_obj; /* Device this PROC represents */
81 u32 process; /* Process owning this Processor */
82 struct mgr_object *mgr_obj; /* Manager Object Handle */
83 u32 attach_count; /* Processor attach count */
84 u32 processor_id; /* Processor number */
85 u32 timeout; /* Time out count */
86 enum dsp_procstate proc_state; /* Processor state */
87 u32 unit; /* DDSP unit number */
88 bool is_already_attached; /*
89 * True if the Device below has
92 struct ntfy_object *ntfy_obj; /* Manages notifications */
93 /* Bridge Context Handle */
94 struct bridge_dev_context *bridge_context;
95 /* Function interface to Bridge driver */
96 struct bridge_drv_interface *intf_fxns;
98 struct list_head proc_list;
103 DEFINE_MUTEX(proc_lock); /* For critical sections */
105 /* ----------------------------------- Function Prototypes */
106 static int proc_monitor(struct proc_object *proc_obj);
107 static s32 get_envp_count(char **envp);
108 static char **prepend_envp(char **new_envp, char **envp, s32 envp_elems,
109 s32 cnew_envp, char *sz_var);
111 /* remember mapping information */
112 static struct dmm_map_object *add_mapping_info(struct process_context *pr_ctxt,
113 u32 mpu_addr, u32 dsp_addr, u32 size)
115 struct dmm_map_object *map_obj;
117 u32 num_usr_pgs = size / PG_SIZE4K;
119 pr_debug("%s: adding map info: mpu_addr 0x%x virt 0x%x size 0x%x\n",
123 map_obj = kzalloc(sizeof(struct dmm_map_object), GFP_KERNEL);
125 pr_err("%s: kzalloc failed\n", __func__);
128 INIT_LIST_HEAD(&map_obj->link);
130 map_obj->pages = kcalloc(num_usr_pgs, sizeof(struct page *),
132 if (!map_obj->pages) {
133 pr_err("%s: kzalloc failed\n", __func__);
138 map_obj->mpu_addr = mpu_addr;
139 map_obj->dsp_addr = dsp_addr;
140 map_obj->size = size;
141 map_obj->num_usr_pgs = num_usr_pgs;
143 spin_lock(&pr_ctxt->dmm_map_lock);
144 list_add(&map_obj->link, &pr_ctxt->dmm_map_list);
145 spin_unlock(&pr_ctxt->dmm_map_lock);
150 static int match_exact_map_obj(struct dmm_map_object *map_obj,
151 u32 dsp_addr, u32 size)
153 if (map_obj->dsp_addr == dsp_addr && map_obj->size != size)
154 pr_err("%s: addr match (0x%x), size don't (0x%x != 0x%x)\n",
155 __func__, dsp_addr, map_obj->size, size);
157 return map_obj->dsp_addr == dsp_addr &&
158 map_obj->size == size;
161 static void remove_mapping_information(struct process_context *pr_ctxt,
162 u32 dsp_addr, u32 size)
164 struct dmm_map_object *map_obj;
166 pr_debug("%s: looking for virt 0x%x size 0x%x\n", __func__,
169 spin_lock(&pr_ctxt->dmm_map_lock);
170 list_for_each_entry(map_obj, &pr_ctxt->dmm_map_list, link) {
171 pr_debug("%s: candidate: mpu_addr 0x%x virt 0x%x size 0x%x\n",
177 if (match_exact_map_obj(map_obj, dsp_addr, size)) {
178 pr_debug("%s: match, deleting map info\n", __func__);
179 list_del(&map_obj->link);
180 kfree(map_obj->dma_info.sg);
181 kfree(map_obj->pages);
185 pr_debug("%s: candidate didn't match\n", __func__);
188 pr_err("%s: failed to find given map info\n", __func__);
190 spin_unlock(&pr_ctxt->dmm_map_lock);
193 static int match_containing_map_obj(struct dmm_map_object *map_obj,
194 u32 mpu_addr, u32 size)
196 u32 map_obj_end = map_obj->mpu_addr + map_obj->size;
198 return mpu_addr >= map_obj->mpu_addr &&
199 mpu_addr + size <= map_obj_end;
202 static struct dmm_map_object *find_containing_mapping(
203 struct process_context *pr_ctxt,
204 u32 mpu_addr, u32 size)
206 struct dmm_map_object *map_obj;
207 pr_debug("%s: looking for mpu_addr 0x%x size 0x%x\n", __func__,
210 spin_lock(&pr_ctxt->dmm_map_lock);
211 list_for_each_entry(map_obj, &pr_ctxt->dmm_map_list, link) {
212 pr_debug("%s: candidate: mpu_addr 0x%x virt 0x%x size 0x%x\n",
217 if (match_containing_map_obj(map_obj, mpu_addr, size)) {
218 pr_debug("%s: match!\n", __func__);
222 pr_debug("%s: no match!\n", __func__);
227 spin_unlock(&pr_ctxt->dmm_map_lock);
231 static int find_first_page_in_cache(struct dmm_map_object *map_obj,
232 unsigned long mpu_addr)
234 u32 mapped_base_page = map_obj->mpu_addr >> PAGE_SHIFT;
235 u32 requested_base_page = mpu_addr >> PAGE_SHIFT;
236 int pg_index = requested_base_page - mapped_base_page;
238 if (pg_index < 0 || pg_index >= map_obj->num_usr_pgs) {
239 pr_err("%s: failed (got %d)\n", __func__, pg_index);
243 pr_debug("%s: first page is %d\n", __func__, pg_index);
247 static inline struct page *get_mapping_page(struct dmm_map_object *map_obj,
250 pr_debug("%s: looking for pg_i %d, num_usr_pgs: %d\n", __func__,
251 pg_i, map_obj->num_usr_pgs);
253 if (pg_i < 0 || pg_i >= map_obj->num_usr_pgs) {
254 pr_err("%s: requested pg_i %d is out of mapped range\n",
259 return map_obj->pages[pg_i];
263 * ======== proc_attach ========
265 * Prepare for communication with a particular DSP processor, and return
266 * a handle to the processor object.
269 proc_attach(u32 processor_id,
270 const struct dsp_processorattrin *attr_in,
271 void **ph_processor, struct process_context *pr_ctxt)
274 struct dev_object *hdev_obj;
275 struct proc_object *p_proc_object = NULL;
276 struct mgr_object *hmgr_obj = NULL;
277 struct drv_object *hdrv_obj = NULL;
278 struct drv_data *drv_datap = dev_get_drvdata(bridge);
281 if (pr_ctxt->processor) {
282 *ph_processor = pr_ctxt->processor;
286 /* Get the Driver and Manager Object Handles */
287 if (!drv_datap || !drv_datap->drv_object || !drv_datap->mgr_object) {
289 pr_err("%s: Failed to get object handles\n", __func__);
291 hdrv_obj = drv_datap->drv_object;
292 hmgr_obj = drv_datap->mgr_object;
296 /* Get the Device Object */
297 status = drv_get_dev_object(processor_id, hdrv_obj, &hdev_obj);
300 status = dev_get_dev_type(hdev_obj, &dev_type);
305 /* If we made it this far, create the Proceesor object: */
306 p_proc_object = kzalloc(sizeof(struct proc_object), GFP_KERNEL);
307 /* Fill out the Processor Object: */
308 if (p_proc_object == NULL) {
312 p_proc_object->dev_obj = hdev_obj;
313 p_proc_object->mgr_obj = hmgr_obj;
314 p_proc_object->processor_id = dev_type;
315 /* Store TGID instead of process handle */
316 p_proc_object->process = current->tgid;
318 INIT_LIST_HEAD(&p_proc_object->proc_list);
321 p_proc_object->timeout = attr_in->timeout;
323 p_proc_object->timeout = PROC_DFLT_TIMEOUT;
325 status = dev_get_intf_fxns(hdev_obj, &p_proc_object->intf_fxns);
327 status = dev_get_bridge_context(hdev_obj,
328 &p_proc_object->bridge_context);
330 kfree(p_proc_object);
332 kfree(p_proc_object);
337 /* Create the Notification Object */
338 /* This is created with no event mask, no notify mask
339 * and no valid handle to the notification. They all get
340 * filled up when proc_register_notify is called */
341 p_proc_object->ntfy_obj = kmalloc(sizeof(struct ntfy_object),
343 if (p_proc_object->ntfy_obj)
344 ntfy_init(p_proc_object->ntfy_obj);
349 /* Insert the Processor Object into the DEV List.
350 * Return handle to this Processor Object:
351 * Find out if the Device is already attached to a
352 * Processor. If so, return AlreadyAttached status */
353 status = dev_insert_proc_object(p_proc_object->dev_obj,
356 is_already_attached);
358 if (p_proc_object->is_already_attached)
361 if (p_proc_object->ntfy_obj) {
362 ntfy_delete(p_proc_object->ntfy_obj);
363 kfree(p_proc_object->ntfy_obj);
366 kfree(p_proc_object);
369 *ph_processor = (void *)p_proc_object;
370 pr_ctxt->processor = *ph_processor;
371 (void)proc_notify_clients(p_proc_object,
372 DSP_PROCESSORATTACH);
375 /* Don't leak memory if status is failed */
376 kfree(p_proc_object);
382 static int get_exec_file(struct cfg_devnode *dev_node_obj,
383 struct dev_object *hdev_obj,
384 u32 size, char *exec_file)
388 struct drv_data *drv_datap = dev_get_drvdata(bridge);
390 dev_get_dev_type(hdev_obj, (u8 *) &dev_type);
395 if (dev_type == DSP_UNIT) {
396 if (!drv_datap || !drv_datap->base_img)
399 if (strlen(drv_datap->base_img) > size)
402 strcpy(exec_file, drv_datap->base_img);
403 } else if (dev_type == IVA_UNIT && iva_img) {
404 len = strlen(iva_img);
405 strncpy(exec_file, iva_img, len + 1);
414 * ======== proc_auto_start ======== =
416 * A Particular device gets loaded with the default image
417 * if the AutoStart flag is set.
419 * hdev_obj: Handle to the Device
421 * 0: On Successful Loading
422 * -EPERM General Failure
427 int proc_auto_start(struct cfg_devnode *dev_node_obj,
428 struct dev_object *hdev_obj)
431 struct proc_object *p_proc_object;
432 char sz_exec_file[MAXCMDLINELEN];
434 struct mgr_object *hmgr_obj = NULL;
435 struct drv_data *drv_datap = dev_get_drvdata(bridge);
438 /* Create a Dummy PROC Object */
439 if (!drv_datap || !drv_datap->mgr_object) {
441 pr_err("%s: Failed to retrieve the object handle\n", __func__);
444 hmgr_obj = drv_datap->mgr_object;
447 p_proc_object = kzalloc(sizeof(struct proc_object), GFP_KERNEL);
448 if (p_proc_object == NULL) {
452 p_proc_object->dev_obj = hdev_obj;
453 p_proc_object->mgr_obj = hmgr_obj;
454 status = dev_get_intf_fxns(hdev_obj, &p_proc_object->intf_fxns);
456 status = dev_get_bridge_context(hdev_obj,
457 &p_proc_object->bridge_context);
461 /* Stop the Device, put it into standby mode */
462 status = proc_stop(p_proc_object);
467 /* Get the default executable for this board... */
468 dev_get_dev_type(hdev_obj, (u8 *) &dev_type);
469 p_proc_object->processor_id = dev_type;
470 status = get_exec_file(dev_node_obj, hdev_obj, sizeof(sz_exec_file),
473 argv[0] = sz_exec_file;
475 /* ...and try to load it: */
476 status = proc_load(p_proc_object, 1, (const char **)argv, NULL);
478 status = proc_start(p_proc_object);
480 kfree(p_proc_object->last_coff);
481 p_proc_object->last_coff = NULL;
483 kfree(p_proc_object);
489 * ======== proc_ctrl ========
491 * Pass control information to the GPP device driver managing the
494 * This will be an OEM-only function, and not part of the DSP/BIOS Bridge
495 * application developer's API.
496 * Call the bridge_dev_ctrl fxn with the Argument. This is a Synchronous
497 * Operation. arg can be null.
499 int proc_ctrl(void *hprocessor, u32 dw_cmd, struct dsp_cbdata * arg)
502 struct proc_object *p_proc_object = hprocessor;
506 /* intercept PWR deep sleep command */
507 if (dw_cmd == BRDIOCTL_DEEPSLEEP) {
508 timeout = arg->cb_data;
509 status = pwr_sleep_dsp(PWR_DEEPSLEEP, timeout);
511 /* intercept PWR emergency sleep command */
512 else if (dw_cmd == BRDIOCTL_EMERGENCYSLEEP) {
513 timeout = arg->cb_data;
514 status = pwr_sleep_dsp(PWR_EMERGENCYDEEPSLEEP, timeout);
515 } else if (dw_cmd == PWR_DEEPSLEEP) {
516 /* timeout = arg->cb_data; */
517 status = pwr_sleep_dsp(PWR_DEEPSLEEP, timeout);
519 /* intercept PWR wake commands */
520 else if (dw_cmd == BRDIOCTL_WAKEUP) {
521 timeout = arg->cb_data;
522 status = pwr_wake_dsp(timeout);
523 } else if (dw_cmd == PWR_WAKEUP) {
524 /* timeout = arg->cb_data; */
525 status = pwr_wake_dsp(timeout);
527 if (!((*p_proc_object->intf_fxns->dev_cntrl)
528 (p_proc_object->bridge_context, dw_cmd,
542 * ======== proc_detach ========
544 * Destroys the Processor Object. Removes the notification from the Dev
547 int proc_detach(struct process_context *pr_ctxt)
550 struct proc_object *p_proc_object = NULL;
552 p_proc_object = (struct proc_object *)pr_ctxt->processor;
555 /* Notify the Client */
556 ntfy_notify(p_proc_object->ntfy_obj, DSP_PROCESSORDETACH);
557 /* Remove the notification memory */
558 if (p_proc_object->ntfy_obj) {
559 ntfy_delete(p_proc_object->ntfy_obj);
560 kfree(p_proc_object->ntfy_obj);
563 kfree(p_proc_object->last_coff);
564 p_proc_object->last_coff = NULL;
565 /* Remove the Proc from the DEV List */
566 (void)dev_remove_proc_object(p_proc_object->dev_obj,
567 (u32) p_proc_object);
568 /* Free the Processor Object */
569 kfree(p_proc_object);
570 pr_ctxt->processor = NULL;
579 * ======== proc_enum_nodes ========
581 * Enumerate and get configuration information about nodes allocated
582 * on a DSP processor.
584 int proc_enum_nodes(void *hprocessor, void **node_tab,
585 u32 node_tab_size, u32 *pu_num_nodes,
589 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
590 struct node_mgr *hnode_mgr = NULL;
593 if (!(dev_get_node_manager(p_proc_object->dev_obj,
596 status = node_enum_nodes(hnode_mgr, node_tab,
609 /* Cache operation against kernel address instead of users */
610 static int build_dma_sg(struct dmm_map_object *map_obj, unsigned long start,
611 ssize_t len, int pg_i)
614 unsigned long offset;
617 struct scatterlist *sg = map_obj->dma_info.sg;
620 page = get_mapping_page(map_obj, pg_i);
622 pr_err("%s: no page for %08lx\n", __func__, start);
625 } else if (IS_ERR(page)) {
626 pr_err("%s: err page for %08lx(%lu)\n", __func__, start,
632 offset = start & ~PAGE_MASK;
633 rest = min_t(ssize_t, PAGE_SIZE - offset, len);
635 sg_set_page(&sg[i], page, rest, offset);
642 if (i != map_obj->dma_info.num_pages) {
643 pr_err("%s: bad number of sg iterations\n", __func__);
652 static int memory_regain_ownership(struct dmm_map_object *map_obj,
653 unsigned long start, ssize_t len, enum dma_data_direction dir)
656 unsigned long first_data_page = start >> PAGE_SHIFT;
657 unsigned long last_data_page = ((u32)(start + len - 1) >> PAGE_SHIFT);
658 /* calculating the number of pages this area spans */
659 unsigned long num_pages = last_data_page - first_data_page + 1;
660 struct bridge_dma_map_info *dma_info = &map_obj->dma_info;
665 if (dma_info->dir != dir || dma_info->num_pages != num_pages) {
666 pr_err("%s: dma info doesn't match given params\n", __func__);
670 dma_unmap_sg(bridge, dma_info->sg, num_pages, dma_info->dir);
672 pr_debug("%s: dma_map_sg unmapped\n", __func__);
676 map_obj->dma_info.sg = NULL;
682 /* Cache operation against kernel address instead of users */
683 static int memory_give_ownership(struct dmm_map_object *map_obj,
684 unsigned long start, ssize_t len, enum dma_data_direction dir)
686 int pg_i, ret, sg_num;
687 struct scatterlist *sg;
688 unsigned long first_data_page = start >> PAGE_SHIFT;
689 unsigned long last_data_page = ((u32)(start + len - 1) >> PAGE_SHIFT);
690 /* calculating the number of pages this area spans */
691 unsigned long num_pages = last_data_page - first_data_page + 1;
693 pg_i = find_first_page_in_cache(map_obj, start);
695 pr_err("%s: failed to find first page in cache\n", __func__);
700 sg = kcalloc(num_pages, sizeof(*sg), GFP_KERNEL);
702 pr_err("%s: kcalloc failed\n", __func__);
707 sg_init_table(sg, num_pages);
709 /* cleanup a previous sg allocation */
710 /* this may happen if application doesn't signal for e/o DMA */
711 kfree(map_obj->dma_info.sg);
713 map_obj->dma_info.sg = sg;
714 map_obj->dma_info.dir = dir;
715 map_obj->dma_info.num_pages = num_pages;
717 ret = build_dma_sg(map_obj, start, len, pg_i);
721 sg_num = dma_map_sg(bridge, sg, num_pages, dir);
723 pr_err("%s: dma_map_sg failed: %d\n", __func__, sg_num);
728 pr_debug("%s: dma_map_sg mapped %d elements\n", __func__, sg_num);
729 map_obj->dma_info.sg_num = sg_num;
735 map_obj->dma_info.sg = NULL;
740 int proc_begin_dma(void *hprocessor, void *pmpu_addr, u32 ul_size,
741 enum dma_data_direction dir)
743 /* Keep STATUS here for future additions to this function */
745 struct process_context *pr_ctxt = (struct process_context *) hprocessor;
746 struct dmm_map_object *map_obj;
753 pr_debug("%s: addr 0x%x, size 0x%x, type %d\n", __func__,
757 mutex_lock(&proc_lock);
759 /* find requested memory are in cached mapping information */
760 map_obj = find_containing_mapping(pr_ctxt, (u32) pmpu_addr, ul_size);
762 pr_err("%s: find_containing_mapping failed\n", __func__);
767 if (memory_give_ownership(map_obj, (u32) pmpu_addr, ul_size, dir)) {
768 pr_err("%s: InValid address parameters %p %x\n",
769 __func__, pmpu_addr, ul_size);
774 mutex_unlock(&proc_lock);
780 int proc_end_dma(void *hprocessor, void *pmpu_addr, u32 ul_size,
781 enum dma_data_direction dir)
783 /* Keep STATUS here for future additions to this function */
785 struct process_context *pr_ctxt = (struct process_context *) hprocessor;
786 struct dmm_map_object *map_obj;
793 pr_debug("%s: addr 0x%x, size 0x%x, type %d\n", __func__,
797 mutex_lock(&proc_lock);
799 /* find requested memory are in cached mapping information */
800 map_obj = find_containing_mapping(pr_ctxt, (u32) pmpu_addr, ul_size);
802 pr_err("%s: find_containing_mapping failed\n", __func__);
807 if (memory_regain_ownership(map_obj, (u32) pmpu_addr, ul_size, dir)) {
808 pr_err("%s: InValid address parameters %p %x\n",
809 __func__, pmpu_addr, ul_size);
814 mutex_unlock(&proc_lock);
820 * ======== proc_flush_memory ========
824 int proc_flush_memory(void *hprocessor, void *pmpu_addr,
825 u32 ul_size, u32 ul_flags)
827 enum dma_data_direction dir = DMA_BIDIRECTIONAL;
829 return proc_begin_dma(hprocessor, pmpu_addr, ul_size, dir);
833 * ======== proc_invalidate_memory ========
835 * Invalidates the memory specified
837 int proc_invalidate_memory(void *hprocessor, void *pmpu_addr, u32 size)
839 enum dma_data_direction dir = DMA_FROM_DEVICE;
841 return proc_begin_dma(hprocessor, pmpu_addr, size, dir);
845 * ======== proc_get_resource_info ========
847 * Enumerate the resources currently available on a processor.
849 int proc_get_resource_info(void *hprocessor, u32 resource_type,
850 struct dsp_resourceinfo *resource_info,
851 u32 resource_info_size)
854 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
855 struct node_mgr *hnode_mgr = NULL;
856 struct nldr_object *nldr_obj = NULL;
857 struct rmm_target_obj *rmm = NULL;
858 struct io_mgr *hio_mgr = NULL; /* IO manager handle */
860 if (!p_proc_object) {
864 switch (resource_type) {
865 case DSP_RESOURCE_DYNDARAM:
866 case DSP_RESOURCE_DYNSARAM:
867 case DSP_RESOURCE_DYNEXTERNAL:
868 case DSP_RESOURCE_DYNSRAM:
869 status = dev_get_node_manager(p_proc_object->dev_obj,
876 status = node_get_nldr_obj(hnode_mgr, &nldr_obj);
878 status = nldr_get_rmm_manager(nldr_obj, &rmm);
881 (enum dsp_memtype)resource_type,
882 (struct dsp_memstat *)
883 &(resource_info->result.
891 case DSP_RESOURCE_PROCLOAD:
892 status = dev_get_io_mgr(p_proc_object->dev_obj, &hio_mgr);
895 p_proc_object->intf_fxns->
896 io_get_proc_load(hio_mgr,
897 (struct dsp_procloadstat *)
898 &(resource_info->result.
912 * ======== proc_exit ========
914 * Decrement reference count, and free resources when reference count is
923 * ======== proc_get_dev_object ========
925 * Return the Dev Object handle for a given Processor.
928 int proc_get_dev_object(void *hprocessor,
929 struct dev_object **device_obj)
932 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
935 *device_obj = p_proc_object->dev_obj;
946 * ======== proc_get_state ========
948 * Report the state of the specified DSP processor.
950 int proc_get_state(void *hprocessor,
951 struct dsp_processorstate *proc_state_obj,
955 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
959 /* First, retrieve BRD state information */
960 status = (*p_proc_object->intf_fxns->brd_status)
961 (p_proc_object->bridge_context, &brd_status);
963 switch (brd_status) {
965 proc_state_obj->proc_state = PROC_STOPPED;
967 case BRD_SLEEP_TRANSITION:
968 case BRD_DSP_HIBERNATION:
971 proc_state_obj->proc_state = PROC_RUNNING;
974 proc_state_obj->proc_state = PROC_LOADED;
977 proc_state_obj->proc_state = PROC_ERROR;
980 proc_state_obj->proc_state = 0xFF;
988 dev_dbg(bridge, "%s, results: status: 0x%x proc_state_obj: 0x%x\n",
989 __func__, status, proc_state_obj->proc_state);
994 * ======== proc_get_trace ========
996 * Retrieve the current contents of the trace buffer, located on the
997 * Processor. Predefined symbols for the trace buffer must have been
998 * configured into the DSP executable.
1000 * We support using the symbols SYS_PUTCBEG and SYS_PUTCEND to define a
1001 * trace buffer, only. Treat it as an undocumented feature.
1002 * This call is destructive, meaning the processor is placed in the monitor
1003 * state as a result of this function.
1005 int proc_get_trace(void *hprocessor, u8 * pbuf, u32 max_size)
1013 * ======== proc_init ========
1015 * Initialize PROC's private state, keeping a reference count on each call
1017 bool proc_init(void)
1028 * ======== proc_load ========
1030 * Reset a processor and load a new base program image.
1031 * This will be an OEM-only function, and not part of the DSP/BIOS Bridge
1032 * application developer's API.
1034 int proc_load(void *hprocessor, const s32 argc_index,
1035 const char **user_args, const char **user_envp)
1038 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
1039 struct io_mgr *hio_mgr; /* IO manager handle */
1040 struct msg_mgr *hmsg_mgr;
1041 struct cod_manager *cod_mgr; /* Code manager handle */
1042 char *pargv0; /* temp argv[0] ptr */
1043 char **new_envp; /* Updated envp[] array. */
1044 char sz_proc_id[MAXPROCIDLEN]; /* Size of "PROC_ID=<n>" */
1045 s32 envp_elems; /* Num elements in envp[]. */
1046 s32 cnew_envp; /* " " in new_envp[] */
1047 s32 nproc_id = 0; /* Anticipate MP version. */
1048 struct dcd_manager *hdcd_handle;
1049 struct dmm_object *dmm_mgr;
1053 struct drv_data *drv_datap = dev_get_drvdata(bridge);
1055 #ifdef OPT_LOAD_TIME_INSTRUMENTATION
1060 #if defined(CONFIG_TIDSPBRIDGE_DVFS) && !defined(CONFIG_CPU_FREQ)
1061 struct dspbridge_platform_data *pdata =
1062 omap_dspbridge_dev->dev.platform_data;
1065 #ifdef OPT_LOAD_TIME_INSTRUMENTATION
1066 do_gettimeofday(&tv1);
1068 if (!p_proc_object) {
1072 dev_get_cod_mgr(p_proc_object->dev_obj, &cod_mgr);
1077 status = proc_stop(hprocessor);
1081 /* Place the board in the monitor state. */
1082 status = proc_monitor(hprocessor);
1086 /* Save ptr to original argv[0]. */
1087 pargv0 = (char *)user_args[0];
1088 /*Prepend "PROC_ID=<nproc_id>"to envp array for target. */
1089 envp_elems = get_envp_count((char **)user_envp);
1090 cnew_envp = (envp_elems ? (envp_elems + 1) : (envp_elems + 2));
1091 new_envp = kzalloc(cnew_envp * sizeof(char **), GFP_KERNEL);
1093 status = snprintf(sz_proc_id, MAXPROCIDLEN, PROC_ENVPROCID,
1096 dev_dbg(bridge, "%s: Proc ID string overflow\n",
1101 prepend_envp(new_envp, (char **)user_envp,
1102 envp_elems, cnew_envp, sz_proc_id);
1103 /* Get the DCD Handle */
1104 status = mgr_get_dcd_handle(p_proc_object->mgr_obj,
1105 (u32 *) &hdcd_handle);
1107 /* Before proceeding with new load,
1108 * check if a previously registered COFF
1110 * If yes, unregister nodes in previously
1111 * registered COFF. If any error occurred,
1112 * set previously registered COFF to NULL. */
1113 if (p_proc_object->last_coff != NULL) {
1115 dcd_auto_unregister(hdcd_handle,
1118 /* Regardless of auto unregister status,
1119 * free previously allocated
1121 kfree(p_proc_object->last_coff);
1122 p_proc_object->last_coff = NULL;
1125 /* On success, do cod_open_base() */
1126 status = cod_open_base(cod_mgr, (char *)user_args[0],
1133 /* Auto-register data base */
1134 /* Get the DCD Handle */
1135 status = mgr_get_dcd_handle(p_proc_object->mgr_obj,
1136 (u32 *) &hdcd_handle);
1138 /* Auto register nodes in specified COFF
1139 * file. If registration did not fail,
1140 * (status = 0 or -EACCES)
1141 * save the name of the COFF file for
1142 * de-registration in the future. */
1144 dcd_auto_register(hdcd_handle,
1145 (char *)user_args[0]);
1146 if (status == -EACCES)
1152 /* Allocate memory for pszLastCoff */
1153 p_proc_object->last_coff =
1154 kzalloc((strlen(user_args[0]) +
1156 /* If memory allocated, save COFF file name */
1157 if (p_proc_object->last_coff) {
1158 strncpy(p_proc_object->last_coff,
1159 (char *)user_args[0],
1160 (strlen((char *)user_args[0]) +
1166 /* Update shared memory address and size */
1168 /* Create the message manager. This must be done
1169 * before calling the IOOnLoaded function. */
1170 dev_get_msg_mgr(p_proc_object->dev_obj, &hmsg_mgr);
1172 status = msg_create(&hmsg_mgr, p_proc_object->dev_obj,
1173 (msg_onexit) node_on_exit);
1174 dev_set_msg_mgr(p_proc_object->dev_obj, hmsg_mgr);
1178 /* Set the Device object's message manager */
1179 status = dev_get_io_mgr(p_proc_object->dev_obj, &hio_mgr);
1181 status = (*p_proc_object->intf_fxns->io_on_loaded)
1187 /* Now, attempt to load an exec: */
1189 /* Boost the OPP level to Maximum level supported by baseport */
1190 #if defined(CONFIG_TIDSPBRIDGE_DVFS) && !defined(CONFIG_CPU_FREQ)
1191 if (pdata->cpu_set_freq)
1192 (*pdata->cpu_set_freq) (pdata->mpu_speed[VDD1_OPP5]);
1194 status = cod_load_base(cod_mgr, argc_index, (char **)user_args,
1196 p_proc_object->dev_obj, NULL);
1198 if (status == -EBADF) {
1199 dev_dbg(bridge, "%s: Failure to Load the EXE\n",
1202 if (status == -ESPIPE) {
1203 pr_err("%s: Couldn't parse the file\n",
1207 /* Requesting the lowest opp supported */
1208 #if defined(CONFIG_TIDSPBRIDGE_DVFS) && !defined(CONFIG_CPU_FREQ)
1209 if (pdata->cpu_set_freq)
1210 (*pdata->cpu_set_freq) (pdata->mpu_speed[VDD1_OPP1]);
1215 /* Update the Processor status to loaded */
1216 status = (*p_proc_object->intf_fxns->brd_set_state)
1217 (p_proc_object->bridge_context, BRD_LOADED);
1219 p_proc_object->proc_state = PROC_LOADED;
1220 if (p_proc_object->ntfy_obj)
1221 proc_notify_clients(p_proc_object,
1222 DSP_PROCESSORSTATECHANGE);
1226 status = proc_get_processor_id(hprocessor, &proc_id);
1227 if (proc_id == DSP_UNIT) {
1228 /* Use all available DSP address space after EXTMEM
1231 status = cod_get_sym_value(cod_mgr, EXTEND,
1234 /* Reset DMM structs and add an initial free chunk */
1237 dev_get_dmm_mgr(p_proc_object->dev_obj,
1240 /* Set dw_ext_end to DMM START u8
1243 (dw_ext_end + 1) * DSPWORDSIZE;
1244 /* DMM memory is from EXT_END */
1245 status = dmm_create_tables(dmm_mgr,
1254 /* Restore the original argv[0] */
1256 user_args[0] = pargv0;
1258 if (!((*p_proc_object->intf_fxns->brd_status)
1259 (p_proc_object->bridge_context, &brd_state))) {
1260 pr_info("%s: Processor Loaded %s\n", __func__, pargv0);
1261 kfree(drv_datap->base_img);
1262 drv_datap->base_img = kmalloc(strlen(pargv0) + 1,
1264 if (drv_datap->base_img)
1265 strncpy(drv_datap->base_img, pargv0,
1266 strlen(pargv0) + 1);
1274 pr_err("%s: Processor failed to load\n", __func__);
1275 proc_stop(p_proc_object);
1277 #ifdef OPT_LOAD_TIME_INSTRUMENTATION
1278 do_gettimeofday(&tv2);
1279 if (tv2.tv_usec < tv1.tv_usec) {
1280 tv2.tv_usec += 1000000;
1283 dev_dbg(bridge, "%s: time to load %d sec and %d usec\n", __func__,
1284 tv2.tv_sec - tv1.tv_sec, tv2.tv_usec - tv1.tv_usec);
1290 * ======== proc_map ========
1292 * Maps a MPU buffer to DSP address space.
1294 int proc_map(void *hprocessor, void *pmpu_addr, u32 ul_size,
1295 void *req_addr, void **pp_map_addr, u32 ul_map_attr,
1296 struct process_context *pr_ctxt)
1300 struct dmm_object *dmm_mgr;
1303 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
1304 struct dmm_map_object *map_obj;
1307 #ifdef CONFIG_TIDSPBRIDGE_CACHE_LINE_CHECK
1308 if ((ul_map_attr & BUFMODE_MASK) != RBUF) {
1309 if (!IS_ALIGNED((u32)pmpu_addr, DSP_CACHE_LINE) ||
1310 !IS_ALIGNED(ul_size, DSP_CACHE_LINE)) {
1311 pr_err("%s: not aligned: 0x%x (%d)\n", __func__,
1312 (u32)pmpu_addr, ul_size);
1318 /* Calculate the page-aligned PA, VA and size */
1319 va_align = PG_ALIGN_LOW((u32) req_addr, PG_SIZE4K);
1320 pa_align = PG_ALIGN_LOW((u32) pmpu_addr, PG_SIZE4K);
1321 size_align = PG_ALIGN_HIGH(ul_size + (u32) pmpu_addr - pa_align,
1324 if (!p_proc_object) {
1328 /* Critical section */
1329 mutex_lock(&proc_lock);
1330 dmm_get_handle(p_proc_object, &dmm_mgr);
1332 status = dmm_map_memory(dmm_mgr, va_align, size_align);
1336 /* Add mapping to the page tables. */
1339 /* Mapped address = MSB of VA | LSB of PA */
1340 tmp_addr = (va_align | ((u32) pmpu_addr & (PG_SIZE4K - 1)));
1341 /* mapped memory resource tracking */
1342 map_obj = add_mapping_info(pr_ctxt, pa_align, tmp_addr,
1347 status = (*p_proc_object->intf_fxns->brd_mem_map)
1348 (p_proc_object->bridge_context, pa_align, va_align,
1349 size_align, ul_map_attr, map_obj->pages);
1352 /* Mapped address = MSB of VA | LSB of PA */
1353 *pp_map_addr = (void *) tmp_addr;
1355 remove_mapping_information(pr_ctxt, tmp_addr, size_align);
1356 dmm_un_map_memory(dmm_mgr, va_align, &size_align);
1358 mutex_unlock(&proc_lock);
1364 dev_dbg(bridge, "%s: hprocessor %p, pmpu_addr %p, ul_size %x, "
1365 "req_addr %p, ul_map_attr %x, pp_map_addr %p, va_align %x, "
1366 "pa_align %x, size_align %x status 0x%x\n", __func__,
1367 hprocessor, pmpu_addr, ul_size, req_addr, ul_map_attr,
1368 pp_map_addr, va_align, pa_align, size_align, status);
1374 * ======== proc_register_notify ========
1376 * Register to be notified of specific processor events.
1378 int proc_register_notify(void *hprocessor, u32 event_mask,
1379 u32 notify_type, struct dsp_notification
1383 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
1384 struct deh_mgr *hdeh_mgr;
1386 /* Check processor handle */
1387 if (!p_proc_object) {
1391 /* Check if event mask is a valid processor related event */
1392 if (event_mask & ~(DSP_PROCESSORSTATECHANGE | DSP_PROCESSORATTACH |
1393 DSP_PROCESSORDETACH | DSP_PROCESSORRESTART |
1394 DSP_MMUFAULT | DSP_SYSERROR | DSP_PWRERROR |
1398 /* Check if notify type is valid */
1399 if (notify_type != DSP_SIGNALEVENT)
1403 /* If event mask is not DSP_SYSERROR, DSP_MMUFAULT,
1404 * or DSP_PWRERROR then register event immediately. */
1406 ~(DSP_SYSERROR | DSP_MMUFAULT | DSP_PWRERROR |
1408 status = ntfy_register(p_proc_object->ntfy_obj,
1409 hnotification, event_mask,
1411 /* Special case alert, special case alert!
1412 * If we're trying to *deregister* (i.e. event_mask
1413 * is 0), a DSP_SYSERROR or DSP_MMUFAULT notification,
1414 * we have to deregister with the DEH manager.
1415 * There's no way to know, based on event_mask which
1416 * manager the notification event was registered with,
1417 * so if we're trying to deregister and ntfy_register
1418 * failed, we'll give the deh manager a shot.
1420 if ((event_mask == 0) && status) {
1422 dev_get_deh_mgr(p_proc_object->dev_obj,
1425 bridge_deh_register_notify(hdeh_mgr,
1431 status = dev_get_deh_mgr(p_proc_object->dev_obj,
1434 bridge_deh_register_notify(hdeh_mgr,
1446 * ======== proc_reserve_memory ========
1448 * Reserve a virtually contiguous region of DSP address space.
1450 int proc_reserve_memory(void *hprocessor, u32 ul_size,
1452 struct process_context *pr_ctxt)
1454 struct dmm_object *dmm_mgr;
1456 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
1457 struct dmm_rsv_object *rsv_obj;
1459 if (!p_proc_object) {
1464 status = dmm_get_handle(p_proc_object, &dmm_mgr);
1470 status = dmm_reserve_memory(dmm_mgr, ul_size, (u32 *) pp_rsv_addr);
1475 * A successful reserve should be followed by insertion of rsv_obj
1476 * into dmm_rsv_list, so that reserved memory resource tracking
1479 rsv_obj = kmalloc(sizeof(struct dmm_rsv_object), GFP_KERNEL);
1481 rsv_obj->dsp_reserved_addr = (u32) *pp_rsv_addr;
1482 spin_lock(&pr_ctxt->dmm_rsv_lock);
1483 list_add(&rsv_obj->link, &pr_ctxt->dmm_rsv_list);
1484 spin_unlock(&pr_ctxt->dmm_rsv_lock);
1488 dev_dbg(bridge, "%s: hprocessor: 0x%p ul_size: 0x%x pp_rsv_addr: 0x%p "
1489 "status 0x%x\n", __func__, hprocessor,
1490 ul_size, pp_rsv_addr, status);
1495 * ======== proc_start ========
1497 * Start a processor running.
1499 int proc_start(void *hprocessor)
1502 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
1503 struct cod_manager *cod_mgr; /* Code manager handle */
1504 u32 dw_dsp_addr; /* Loaded code's entry point. */
1507 if (!p_proc_object) {
1511 /* Call the bridge_brd_start */
1512 if (p_proc_object->proc_state != PROC_LOADED) {
1516 status = dev_get_cod_mgr(p_proc_object->dev_obj, &cod_mgr);
1522 status = cod_get_entry(cod_mgr, &dw_dsp_addr);
1526 status = (*p_proc_object->intf_fxns->brd_start)
1527 (p_proc_object->bridge_context, dw_dsp_addr);
1531 /* Call dev_create2 */
1532 status = dev_create2(p_proc_object->dev_obj);
1534 p_proc_object->proc_state = PROC_RUNNING;
1535 /* Deep sleep switces off the peripheral clocks.
1536 * we just put the DSP CPU in idle in the idle loop.
1537 * so there is no need to send a command to DSP */
1539 if (p_proc_object->ntfy_obj) {
1540 proc_notify_clients(p_proc_object,
1541 DSP_PROCESSORSTATECHANGE);
1544 /* Failed to Create Node Manager and DISP Object
1545 * Stop the Processor from running. Put it in STOPPED State */
1546 (void)(*p_proc_object->intf_fxns->
1547 brd_stop) (p_proc_object->bridge_context);
1548 p_proc_object->proc_state = PROC_STOPPED;
1552 if (!((*p_proc_object->intf_fxns->brd_status)
1553 (p_proc_object->bridge_context, &brd_state))) {
1554 pr_info("%s: dsp in running state\n", __func__);
1557 pr_err("%s: Failed to start the dsp\n", __func__);
1558 proc_stop(p_proc_object);
1566 * ======== proc_stop ========
1568 * Stop a processor running.
1570 int proc_stop(void *hprocessor)
1573 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
1574 struct msg_mgr *hmsg_mgr;
1575 struct node_mgr *hnode_mgr;
1577 u32 node_tab_size = 1;
1579 u32 nodes_allocated = 0;
1581 if (!p_proc_object) {
1585 /* check if there are any running nodes */
1586 status = dev_get_node_manager(p_proc_object->dev_obj, &hnode_mgr);
1587 if (!status && hnode_mgr) {
1588 status = node_enum_nodes(hnode_mgr, &hnode, node_tab_size,
1589 &num_nodes, &nodes_allocated);
1590 if ((status == -EINVAL) || (nodes_allocated > 0)) {
1591 pr_err("%s: Can't stop device, active nodes = %d \n",
1592 __func__, nodes_allocated);
1596 /* Call the bridge_brd_stop */
1597 /* It is OK to stop a device that does n't have nodes OR not started */
1599 (*p_proc_object->intf_fxns->
1600 brd_stop) (p_proc_object->bridge_context);
1602 dev_dbg(bridge, "%s: processor in standby mode\n", __func__);
1603 p_proc_object->proc_state = PROC_STOPPED;
1604 /* Destroy the Node Manager, msg_ctrl Manager */
1605 if (!(dev_destroy2(p_proc_object->dev_obj))) {
1606 /* Destroy the msg_ctrl by calling msg_delete */
1607 dev_get_msg_mgr(p_proc_object->dev_obj, &hmsg_mgr);
1609 msg_delete(hmsg_mgr);
1610 dev_set_msg_mgr(p_proc_object->dev_obj, NULL);
1614 pr_err("%s: Failed to stop the processor\n", __func__);
1622 * ======== proc_un_map ========
1624 * Removes a MPU buffer mapping from the DSP address space.
1626 int proc_un_map(void *hprocessor, void *map_addr,
1627 struct process_context *pr_ctxt)
1630 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
1631 struct dmm_object *dmm_mgr;
1635 va_align = PG_ALIGN_LOW((u32) map_addr, PG_SIZE4K);
1636 if (!p_proc_object) {
1641 status = dmm_get_handle(hprocessor, &dmm_mgr);
1647 /* Critical section */
1648 mutex_lock(&proc_lock);
1650 * Update DMM structures. Get the size to unmap.
1651 * This function returns error if the VA is not mapped
1653 status = dmm_un_map_memory(dmm_mgr, (u32) va_align, &size_align);
1654 /* Remove mapping from the page tables. */
1656 status = (*p_proc_object->intf_fxns->brd_mem_un_map)
1657 (p_proc_object->bridge_context, va_align, size_align);
1664 * A successful unmap should be followed by removal of map_obj
1665 * from dmm_map_list, so that mapped memory resource tracking
1668 remove_mapping_information(pr_ctxt, (u32) map_addr, size_align);
1671 mutex_unlock(&proc_lock);
1674 dev_dbg(bridge, "%s: hprocessor: 0x%p map_addr: 0x%p status: 0x%x\n",
1675 __func__, hprocessor, map_addr, status);
1680 * ======== proc_un_reserve_memory ========
1682 * Frees a previously reserved region of DSP address space.
1684 int proc_un_reserve_memory(void *hprocessor, void *prsv_addr,
1685 struct process_context *pr_ctxt)
1687 struct dmm_object *dmm_mgr;
1689 struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
1690 struct dmm_rsv_object *rsv_obj;
1692 if (!p_proc_object) {
1697 status = dmm_get_handle(p_proc_object, &dmm_mgr);
1703 status = dmm_un_reserve_memory(dmm_mgr, (u32) prsv_addr);
1708 * A successful unreserve should be followed by removal of rsv_obj
1709 * from dmm_rsv_list, so that reserved memory resource tracking
1712 spin_lock(&pr_ctxt->dmm_rsv_lock);
1713 list_for_each_entry(rsv_obj, &pr_ctxt->dmm_rsv_list, link) {
1714 if (rsv_obj->dsp_reserved_addr == (u32) prsv_addr) {
1715 list_del(&rsv_obj->link);
1720 spin_unlock(&pr_ctxt->dmm_rsv_lock);
1723 dev_dbg(bridge, "%s: hprocessor: 0x%p prsv_addr: 0x%p status: 0x%x\n",
1724 __func__, hprocessor, prsv_addr, status);
1729 * ======== = proc_monitor ======== ==
1731 * Place the Processor in Monitor State. This is an internal
1732 * function and a requirement before Processor is loaded.
1733 * This does a bridge_brd_stop, dev_destroy2 and bridge_brd_monitor.
1734 * In dev_destroy2 we delete the node manager.
1736 * p_proc_object: Pointer to Processor Object
1738 * 0: Processor placed in monitor mode.
1739 * !0: Failed to place processor in monitor mode.
1741 * Valid Processor Handle
1743 * Success: ProcObject state is PROC_IDLE
1745 static int proc_monitor(struct proc_object *proc_obj)
1747 int status = -EPERM;
1748 struct msg_mgr *hmsg_mgr;
1750 /* This is needed only when Device is loaded when it is
1751 * already 'ACTIVE' */
1752 /* Destroy the Node Manager, msg_ctrl Manager */
1753 if (!dev_destroy2(proc_obj->dev_obj)) {
1754 /* Destroy the msg_ctrl by calling msg_delete */
1755 dev_get_msg_mgr(proc_obj->dev_obj, &hmsg_mgr);
1757 msg_delete(hmsg_mgr);
1758 dev_set_msg_mgr(proc_obj->dev_obj, NULL);
1761 /* Place the Board in the Monitor State */
1762 if (!((*proc_obj->intf_fxns->brd_monitor)
1763 (proc_obj->bridge_context))) {
1771 * ======== get_envp_count ========
1773 * Return the number of elements in the envp array, including the
1774 * terminating NULL element.
1776 static s32 get_envp_count(char **envp)
1783 ret += 1; /* Include the terminating NULL in the count. */
1790 * ======== prepend_envp ========
1792 * Prepend an environment variable=value pair to the new envp array, and
1793 * copy in the existing var=value pairs in the old envp array.
1795 static char **prepend_envp(char **new_envp, char **envp, s32 envp_elems,
1796 s32 cnew_envp, char *sz_var)
1798 char **pp_envp = new_envp;
1800 /* Prepend new environ var=value string */
1801 *new_envp++ = sz_var;
1803 /* Copy user's environment into our own. */
1804 while (envp_elems--)
1805 *new_envp++ = *envp++;
1807 /* Ensure NULL terminates the new environment strings array. */
1808 if (envp_elems == 0)
1815 * ======== proc_notify_clients ========
1817 * Notify the processor the events.
1819 int proc_notify_clients(void *proc, u32 events)
1822 struct proc_object *p_proc_object = (struct proc_object *)proc;
1824 if (!p_proc_object) {
1829 ntfy_notify(p_proc_object->ntfy_obj, events);
1835 * ======== proc_notify_all_clients ========
1837 * Notify the processor the events. This includes notifying all clients
1838 * attached to a particulat DSP.
1840 int proc_notify_all_clients(void *proc, u32 events)
1843 struct proc_object *p_proc_object = (struct proc_object *)proc;
1845 if (!p_proc_object) {
1850 dev_notify_clients(p_proc_object->dev_obj, events);
1857 * ======== proc_get_processor_id ========
1859 * Retrieves the processor ID.
1861 int proc_get_processor_id(void *proc, u32 * proc_id)
1864 struct proc_object *p_proc_object = (struct proc_object *)proc;
1867 *proc_id = p_proc_object->processor_id;