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Diffstat (limited to 'drivers/staging/tidspbridge/include/dspbridge/rmm.h')
| -rw-r--r-- | drivers/staging/tidspbridge/include/dspbridge/rmm.h | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/drivers/staging/tidspbridge/include/dspbridge/rmm.h b/drivers/staging/tidspbridge/include/dspbridge/rmm.h new file mode 100644 index 000000000000..baea536681e9 --- /dev/null +++ b/drivers/staging/tidspbridge/include/dspbridge/rmm.h @@ -0,0 +1,181 @@ +/* + * rmm.h + * + * DSP-BIOS Bridge driver support functions for TI OMAP processors. + * + * This memory manager provides general heap management and arbitrary + * alignment for any number of memory segments, and management of overlay + * memory. + * + * 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 RMM_ +#define RMM_ + +/* + * ======== rmm_addr ======== + * DSP address + segid + */ +struct rmm_addr { + u32 addr; + s32 segid; +}; + +/* + * ======== rmm_segment ======== + * Memory segment on the DSP available for remote allocations. + */ +struct rmm_segment { + u32 base; /* Base of the segment */ + u32 length; /* Size of the segment (target MAUs) */ + s32 space; /* Code or data */ + u32 number; /* Number of Allocated Blocks */ +}; + +/* + * ======== RMM_Target ======== + */ +struct rmm_target_obj; + +/* + * ======== rmm_alloc ======== + * + * rmm_alloc is used to remotely allocate or reserve memory on the DSP. + * + * Parameters: + * target - Target returned from rmm_create(). + * segid - Memory segment to allocate from. + * size - Size (target MAUS) to allocate. + * align - alignment. + * dsp_address - If reserve is FALSE, the location to store allocated + * address on output, otherwise, the DSP address to + * reserve. + * reserve - If TRUE, reserve the memory specified by dsp_address. + * Returns: + * 0: Success. + * -ENOMEM: Memory allocation on GPP failed. + * -ENXIO: Cannot "allocate" overlay memory because it's + * already in use. + * Requires: + * RMM initialized. + * Valid target. + * dsp_address != NULL. + * size > 0 + * reserve || target->num_segs > 0. + * Ensures: + */ +extern int rmm_alloc(struct rmm_target_obj *target, u32 segid, u32 size, + u32 align, u32 *dsp_address, bool reserve); + +/* + * ======== rmm_create ======== + * Create a target object with memory segments for remote allocation. If + * seg_tab == NULL or num_segs == 0, memory can only be reserved through + * rmm_alloc(). + * + * Parameters: + * target_obj: - Location to store target on output. + * seg_tab: - Table of memory segments. + * num_segs: - Number of memory segments. + * Returns: + * 0: Success. + * -ENOMEM: Memory allocation failed. + * Requires: + * RMM initialized. + * target_obj != NULL. + * num_segs == 0 || seg_tab != NULL. + * Ensures: + * Success: Valid *target_obj. + * Failure: *target_obj == NULL. + */ +extern int rmm_create(struct rmm_target_obj **target_obj, + struct rmm_segment seg_tab[], u32 num_segs); + +/* + * ======== rmm_delete ======== + * Delete target allocated in rmm_create(). + * + * Parameters: + * target - Target returned from rmm_create(). + * Returns: + * Requires: + * RMM initialized. + * Valid target. + * Ensures: + */ +extern void rmm_delete(struct rmm_target_obj *target); + +/* + * ======== rmm_exit ======== + * Exit the RMM module + * + * Parameters: + * Returns: + * Requires: + * rmm_init successfully called. + * Ensures: + */ +extern void rmm_exit(void); + +/* + * ======== rmm_free ======== + * Free or unreserve memory allocated through rmm_alloc(). + * + * Parameters: + * target: - Target returned from rmm_create(). + * segid: - Segment of memory to free. + * dsp_address: - Address to free or unreserve. + * size: - Size of memory to free or unreserve. + * reserved: - TRUE if memory was reserved only, otherwise FALSE. + * Returns: + * Requires: + * RMM initialized. + * Valid target. + * reserved || segid < target->num_segs. + * reserve || [dsp_address, dsp_address + size] is a valid memory range. + * Ensures: + */ +extern bool rmm_free(struct rmm_target_obj *target, u32 segid, u32 dsp_addr, + u32 size, bool reserved); + +/* + * ======== rmm_init ======== + * Initialize the RMM module + * + * Parameters: + * Returns: + * TRUE: Success. + * FALSE: Failure. + * Requires: + * Ensures: + */ +extern bool rmm_init(void); + +/* + * ======== rmm_stat ======== + * Obtain memory segment status + * + * Parameters: + * segid: Segment ID of the dynamic loading segment. + * mem_stat_buf: Pointer to allocated buffer into which memory stats are + * placed. + * Returns: + * TRUE: Success. + * FALSE: Failure. + * Requires: + * segid < target->num_segs + * Ensures: + */ +extern bool rmm_stat(struct rmm_target_obj *target, enum dsp_memtype segid, + struct dsp_memstat *mem_stat_buf); + +#endif /* RMM_ */ |