1 /* =========================================================================
2 * $File: //dwh/usb_iip/dev/software/dwc_common_port_2/dwc_os.h $
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45 * DWC portability library, low level os-wrapper functions
49 /* These basic types need to be defined by some OS header file or custom header
50 * file for your specific target architecture.
52 * uint8_t, int8_t, uint16_t, int16_t, uint32_t, int32_t, uint64_t, int64_t
54 * Any custom or alternate header file must be added and enabled here.
58 # include <linux/types.h>
59 # ifdef CONFIG_DEBUG_MUTEXES
60 # include <linux/mutex.h>
62 # include <linux/spinlock.h>
63 # include <linux/errno.h>
67 #if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
72 /** @name Primitive Types and Values */
74 /** We define a boolean type for consistency. Can be either YES or NO */
75 typedef uint8_t dwc_bool_t;
81 /** @name Error Codes */
82 #define DWC_E_INVALID EINVAL
83 #define DWC_E_NO_MEMORY ENOMEM
84 #define DWC_E_NO_DEVICE ENODEV
85 #define DWC_E_NOT_SUPPORTED EOPNOTSUPP
86 #define DWC_E_TIMEOUT ETIMEDOUT
87 #define DWC_E_BUSY EBUSY
88 #define DWC_E_AGAIN EAGAIN
89 #define DWC_E_RESTART ERESTART
90 #define DWC_E_ABORT ECONNABORTED
91 #define DWC_E_SHUTDOWN ESHUTDOWN
92 #define DWC_E_NO_DATA ENODATA
93 #define DWC_E_DISCONNECT ECONNRESET
94 #define DWC_E_UNKNOWN EINVAL
95 #define DWC_E_NO_STREAM_RES ENOSR
96 #define DWC_E_COMMUNICATION ECOMM
97 #define DWC_E_OVERFLOW EOVERFLOW
98 #define DWC_E_PROTOCOL EPROTO
99 #define DWC_E_IN_PROGRESS EINPROGRESS
100 #define DWC_E_PIPE EPIPE
102 #define DWC_E_NO_SPACE ENOSPC
106 /** @name Error Codes */
107 #define DWC_E_INVALID 1001
108 #define DWC_E_NO_MEMORY 1002
109 #define DWC_E_NO_DEVICE 1003
110 #define DWC_E_NOT_SUPPORTED 1004
111 #define DWC_E_TIMEOUT 1005
112 #define DWC_E_BUSY 1006
113 #define DWC_E_AGAIN 1007
114 #define DWC_E_RESTART 1008
115 #define DWC_E_ABORT 1009
116 #define DWC_E_SHUTDOWN 1010
117 #define DWC_E_NO_DATA 1011
118 #define DWC_E_DISCONNECT 2000
119 #define DWC_E_UNKNOWN 3000
120 #define DWC_E_NO_STREAM_RES 4001
121 #define DWC_E_COMMUNICATION 4002
122 #define DWC_E_OVERFLOW 4003
123 #define DWC_E_PROTOCOL 4004
124 #define DWC_E_IN_PROGRESS 4005
125 #define DWC_E_PIPE 4006
126 #define DWC_E_IO 4007
127 #define DWC_E_NO_SPACE 4008
132 /** @name Tracing/Logging Functions
134 * These function provide the capability to add tracing, debugging, and error
135 * messages, as well exceptions as assertions. The WUDEV uses these
136 * extensively. These could be logged to the main console, the serial port, an
137 * internal buffer, etc. These functions could also be no-op if they are too
138 * expensive on your system. By default undefining the DEBUG macro already
139 * no-ops some of these functions. */
141 /** Returns non-zero if in interrupt context. */
142 extern dwc_bool_t DWC_IN_IRQ(void);
143 #define dwc_in_irq DWC_IN_IRQ
145 /** Returns "IRQ" if DWC_IN_IRQ is true. */
146 static inline char *dwc_irq(void) {
147 return DWC_IN_IRQ() ? "IRQ" : "";
150 /** Returns non-zero if in bottom-half context. */
151 extern dwc_bool_t DWC_IN_BH(void);
152 #define dwc_in_bh DWC_IN_BH
154 /** Returns "BH" if DWC_IN_BH is true. */
155 static inline char *dwc_bh(void) {
156 return DWC_IN_BH() ? "BH" : "";
160 * A vprintf() clone. Just call vprintf if you've got it.
162 extern void DWC_VPRINTF(char *format, va_list args);
163 #define dwc_vprintf DWC_VPRINTF
166 * A vsnprintf() clone. Just call vprintf if you've got it.
168 extern int DWC_VSNPRINTF(char *str, int size, char *format, va_list args);
169 #define dwc_vsnprintf DWC_VSNPRINTF
172 * printf() clone. Just call printf if you've go it.
174 extern void DWC_PRINTF(char *format, ...)
175 /* This provides compiler level static checking of the parameters if you're
178 __attribute__ ((format(printf, 1, 2)));
182 #define dwc_printf DWC_PRINTF
185 * sprintf() clone. Just call sprintf if you've got it.
187 extern int DWC_SPRINTF(char *string, char *format, ...)
189 __attribute__ ((format(printf, 2, 3)));
193 #define dwc_sprintf DWC_SPRINTF
196 * snprintf() clone. Just call snprintf if you've got it.
198 extern int DWC_SNPRINTF(char *string, int size, char *format, ...)
200 __attribute__ ((format(printf, 3, 4)));
204 #define dwc_snprintf DWC_SNPRINTF
207 * Prints a WARNING message. On systems that don't differentiate between
208 * warnings and regular log messages, just print it. Indicates that something
209 * may be wrong with the driver. Works like printf().
211 * Use the DWC_WARN macro to call this function.
213 extern void __DWC_WARN(char *format, ...)
215 __attribute__ ((format(printf, 1, 2)));
221 * Prints an error message. On systems that don't differentiate between errors
222 * and regular log messages, just print it. Indicates that something went wrong
223 * with the driver. Works like printf().
225 * Use the DWC_ERROR macro to call this function.
227 extern void __DWC_ERROR(char *format, ...)
229 __attribute__ ((format(printf, 1, 2)));
235 * Prints an exception error message and takes some user-defined action such as
236 * print out a backtrace or trigger a breakpoint. Indicates that something went
237 * abnormally wrong with the driver such as programmer error, or other
238 * exceptional condition. It should not be ignored so even on systems without
239 * printing capability, some action should be taken to notify the developer of
240 * it. Works like printf().
242 extern void DWC_EXCEPTION(char *format, ...)
244 __attribute__ ((format(printf, 1, 2)));
248 #define dwc_exception DWC_EXCEPTION
250 #ifndef DWC_OTG_DEBUG_LEV
251 #define DWC_OTG_DEBUG_LEV 0
256 * Prints out a debug message. Used for logging/trace messages.
258 * Use the DWC_DEBUG macro to call this function
260 extern void __DWC_DEBUG(char *format, ...)
262 __attribute__ ((format(printf, 1, 2)));
267 #define __DWC_DEBUG printk
271 * Prints out a Debug message.
273 #define DWC_DEBUG(_format, _args...) __DWC_DEBUG("DEBUG:%s:%s: " _format "\n", \
274 __func__, dwc_irq(), ## _args)
275 #define dwc_debug DWC_DEBUG
277 * Prints out a Debug message if enabled at compile time.
279 #if DWC_OTG_DEBUG_LEV > 0
280 #define DWC_DEBUGC(_format, _args...) DWC_DEBUG(_format, ##_args )
282 #define DWC_DEBUGC(_format, _args...)
284 #define dwc_debugc DWC_DEBUGC
286 * Prints out an informative message.
288 #define DWC_INFO(_format, _args...) DWC_PRINTF("INFO:%s: " _format "\n", \
290 #define dwc_info DWC_INFO
292 * Prints out an informative message if enabled at compile time.
294 #if DWC_OTG_DEBUG_LEV > 1
295 #define DWC_INFOC(_format, _args...) DWC_INFO(_format, ##_args )
297 #define DWC_INFOC(_format, _args...)
299 #define dwc_infoc DWC_INFOC
301 * Prints out a warning message.
303 #define DWC_WARN(_format, _args...) __DWC_WARN("WARN:%s:%s:%d: " _format "\n", \
304 dwc_irq(), __func__, __LINE__, ## _args)
305 #define dwc_warn DWC_WARN
307 * Prints out an error message.
309 #define DWC_ERROR(_format, _args...) __DWC_ERROR("ERROR:%s:%s:%d: " _format "\n", \
310 dwc_irq(), __func__, __LINE__, ## _args)
311 #define dwc_error DWC_ERROR
313 #define DWC_PROTO_ERROR(_format, _args...) __DWC_WARN("ERROR:%s:%s:%d: " _format "\n", \
314 dwc_irq(), __func__, __LINE__, ## _args)
315 #define dwc_proto_error DWC_PROTO_ERROR
318 /** Prints out a exception error message if the _expr expression fails. Disabled
319 * if DEBUG is not enabled. */
320 #define DWC_ASSERT(_expr, _format, _args...) do { \
321 if (!(_expr)) { DWC_EXCEPTION("%s:%s:%d: " _format "\n", dwc_irq(), \
322 __FILE__, __LINE__, ## _args); } \
325 #define DWC_ASSERT(_x...)
327 #define dwc_assert DWC_ASSERT
330 /** @name Byte Ordering
331 * The following functions are for conversions between processor's byte ordering
332 * and specific ordering you want.
335 /** Converts 32 bit data in CPU byte ordering to little endian. */
336 extern uint32_t DWC_CPU_TO_LE32(uint32_t *p);
337 #define dwc_cpu_to_le32 DWC_CPU_TO_LE32
339 /** Converts 32 bit data in CPU byte orderint to big endian. */
340 extern uint32_t DWC_CPU_TO_BE32(uint32_t *p);
341 #define dwc_cpu_to_be32 DWC_CPU_TO_BE32
343 /** Converts 32 bit little endian data to CPU byte ordering. */
344 extern uint32_t DWC_LE32_TO_CPU(uint32_t *p);
345 #define dwc_le32_to_cpu DWC_LE32_TO_CPU
347 /** Converts 32 bit big endian data to CPU byte ordering. */
348 extern uint32_t DWC_BE32_TO_CPU(uint32_t *p);
349 #define dwc_be32_to_cpu DWC_BE32_TO_CPU
351 /** Converts 16 bit data in CPU byte ordering to little endian. */
352 extern uint16_t DWC_CPU_TO_LE16(uint16_t *p);
353 #define dwc_cpu_to_le16 DWC_CPU_TO_LE16
355 /** Converts 16 bit data in CPU byte orderint to big endian. */
356 extern uint16_t DWC_CPU_TO_BE16(uint16_t *p);
357 #define dwc_cpu_to_be16 DWC_CPU_TO_BE16
359 /** Converts 16 bit little endian data to CPU byte ordering. */
360 extern uint16_t DWC_LE16_TO_CPU(uint16_t *p);
361 #define dwc_le16_to_cpu DWC_LE16_TO_CPU
363 /** Converts 16 bit bi endian data to CPU byte ordering. */
364 extern uint16_t DWC_BE16_TO_CPU(uint16_t *p);
365 #define dwc_be16_to_cpu DWC_BE16_TO_CPU
368 /** @name Register Read/Write
370 * The following six functions should be implemented to read/write registers of
371 * 32-bit and 64-bit sizes. All modules use this to read/write register values.
372 * The reg value is a pointer to the register calculated from the void *base
373 * variable passed into the driver when it is started. */
376 /* Linux doesn't need any extra parameters for register read/write, so we
377 * just throw away the IO context parameter.
379 /** Reads the content of a 32-bit register. */
380 extern uint32_t DWC_READ_REG32(uint32_t volatile *reg);
381 #define dwc_read_reg32(_ctx_,_reg_) DWC_READ_REG32(_reg_)
383 /** Reads the content of a 64-bit register. */
384 extern uint64_t DWC_READ_REG64(uint64_t volatile *reg);
385 #define dwc_read_reg64(_ctx_,_reg_) DWC_READ_REG64(_reg_)
387 /** Writes to a 32-bit register. */
388 extern void DWC_WRITE_REG32(uint32_t volatile *reg, uint32_t value);
389 #define dwc_write_reg32(_ctx_,_reg_,_val_) DWC_WRITE_REG32(_reg_, _val_)
391 /** Writes to a 64-bit register. */
392 extern void DWC_WRITE_REG64(uint64_t volatile *reg, uint64_t value);
393 #define dwc_write_reg64(_ctx_,_reg_,_val_) DWC_WRITE_REG64(_reg_, _val_)
396 * Modify bit values in a register. Using the
397 * algorithm: (reg_contents & ~clear_mask) | set_mask.
399 extern void DWC_MODIFY_REG32(uint32_t volatile *reg, uint32_t clear_mask, uint32_t set_mask);
400 #define dwc_modify_reg32(_ctx_,_reg_,_cmsk_,_smsk_) DWC_MODIFY_REG32(_reg_,_cmsk_,_smsk_)
401 extern void DWC_MODIFY_REG64(uint64_t volatile *reg, uint64_t clear_mask, uint64_t set_mask);
402 #define dwc_modify_reg64(_ctx_,_reg_,_cmsk_,_smsk_) DWC_MODIFY_REG64(_reg_,_cmsk_,_smsk_)
404 #endif /* DWC_LINUX */
406 #if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
407 typedef struct dwc_ioctx {
410 bus_space_handle_t ioh;
413 /** BSD needs two extra parameters for register read/write, so we pass
414 * them in using the IO context parameter.
416 /** Reads the content of a 32-bit register. */
417 extern uint32_t DWC_READ_REG32(void *io_ctx, uint32_t volatile *reg);
418 #define dwc_read_reg32 DWC_READ_REG32
420 /** Reads the content of a 64-bit register. */
421 extern uint64_t DWC_READ_REG64(void *io_ctx, uint64_t volatile *reg);
422 #define dwc_read_reg64 DWC_READ_REG64
424 /** Writes to a 32-bit register. */
425 extern void DWC_WRITE_REG32(void *io_ctx, uint32_t volatile *reg, uint32_t value);
426 #define dwc_write_reg32 DWC_WRITE_REG32
428 /** Writes to a 64-bit register. */
429 extern void DWC_WRITE_REG64(void *io_ctx, uint64_t volatile *reg, uint64_t value);
430 #define dwc_write_reg64 DWC_WRITE_REG64
433 * Modify bit values in a register. Using the
434 * algorithm: (reg_contents & ~clear_mask) | set_mask.
436 extern void DWC_MODIFY_REG32(void *io_ctx, uint32_t volatile *reg, uint32_t clear_mask, uint32_t set_mask);
437 #define dwc_modify_reg32 DWC_MODIFY_REG32
438 extern void DWC_MODIFY_REG64(void *io_ctx, uint64_t volatile *reg, uint64_t clear_mask, uint64_t set_mask);
439 #define dwc_modify_reg64 DWC_MODIFY_REG64
441 #endif /* DWC_FREEBSD || DWC_NETBSD */
445 /** @name Some convenience MACROS used internally. Define DWC_DEBUG_REGS to log the
446 * register writes. */
450 # ifdef DWC_DEBUG_REGS
452 #define dwc_define_read_write_reg_n(_reg,_container_type) \
453 static inline uint32_t dwc_read_##_reg##_n(_container_type *container, int num) { \
454 return DWC_READ_REG32(&container->regs->_reg[num]); \
456 static inline void dwc_write_##_reg##_n(_container_type *container, int num, uint32_t data) { \
457 DWC_DEBUG("WRITING %8s[%d]: %p: %08x", #_reg, num, \
458 &(((uint32_t*)container->regs->_reg)[num]), data); \
459 DWC_WRITE_REG32(&(((uint32_t*)container->regs->_reg)[num]), data); \
462 #define dwc_define_read_write_reg(_reg,_container_type) \
463 static inline uint32_t dwc_read_##_reg(_container_type *container) { \
464 return DWC_READ_REG32(&container->regs->_reg); \
466 static inline void dwc_write_##_reg(_container_type *container, uint32_t data) { \
467 DWC_DEBUG("WRITING %11s: %p: %08x", #_reg, &container->regs->_reg, data); \
468 DWC_WRITE_REG32(&container->regs->_reg, data); \
471 # else /* DWC_DEBUG_REGS */
473 #define dwc_define_read_write_reg_n(_reg,_container_type) \
474 static inline uint32_t dwc_read_##_reg##_n(_container_type *container, int num) { \
475 return DWC_READ_REG32(&container->regs->_reg[num]); \
477 static inline void dwc_write_##_reg##_n(_container_type *container, int num, uint32_t data) { \
478 DWC_WRITE_REG32(&(((uint32_t*)container->regs->_reg)[num]), data); \
481 #define dwc_define_read_write_reg(_reg,_container_type) \
482 static inline uint32_t dwc_read_##_reg(_container_type *container) { \
483 return DWC_READ_REG32(&container->regs->_reg); \
485 static inline void dwc_write_##_reg(_container_type *container, uint32_t data) { \
486 DWC_WRITE_REG32(&container->regs->_reg, data); \
489 # endif /* DWC_DEBUG_REGS */
491 #endif /* DWC_LINUX */
493 #if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
495 # ifdef DWC_DEBUG_REGS
497 #define dwc_define_read_write_reg_n(_reg,_container_type) \
498 static inline uint32_t dwc_read_##_reg##_n(void *io_ctx, _container_type *container, int num) { \
499 return DWC_READ_REG32(io_ctx, &container->regs->_reg[num]); \
501 static inline void dwc_write_##_reg##_n(void *io_ctx, _container_type *container, int num, uint32_t data) { \
502 DWC_DEBUG("WRITING %8s[%d]: %p: %08x", #_reg, num, \
503 &(((uint32_t*)container->regs->_reg)[num]), data); \
504 DWC_WRITE_REG32(io_ctx, &(((uint32_t*)container->regs->_reg)[num]), data); \
507 #define dwc_define_read_write_reg(_reg,_container_type) \
508 static inline uint32_t dwc_read_##_reg(void *io_ctx, _container_type *container) { \
509 return DWC_READ_REG32(io_ctx, &container->regs->_reg); \
511 static inline void dwc_write_##_reg(void *io_ctx, _container_type *container, uint32_t data) { \
512 DWC_DEBUG("WRITING %11s: %p: %08x", #_reg, &container->regs->_reg, data); \
513 DWC_WRITE_REG32(io_ctx, &container->regs->_reg, data); \
516 # else /* DWC_DEBUG_REGS */
518 #define dwc_define_read_write_reg_n(_reg,_container_type) \
519 static inline uint32_t dwc_read_##_reg##_n(void *io_ctx, _container_type *container, int num) { \
520 return DWC_READ_REG32(io_ctx, &container->regs->_reg[num]); \
522 static inline void dwc_write_##_reg##_n(void *io_ctx, _container_type *container, int num, uint32_t data) { \
523 DWC_WRITE_REG32(io_ctx, &(((uint32_t*)container->regs->_reg)[num]), data); \
526 #define dwc_define_read_write_reg(_reg,_container_type) \
527 static inline uint32_t dwc_read_##_reg(void *io_ctx, _container_type *container) { \
528 return DWC_READ_REG32(io_ctx, &container->regs->_reg); \
530 static inline void dwc_write_##_reg(void *io_ctx, _container_type *container, uint32_t data) { \
531 DWC_WRITE_REG32(io_ctx, &container->regs->_reg, data); \
534 # endif /* DWC_DEBUG_REGS */
536 #endif /* DWC_FREEBSD || DWC_NETBSD */
542 /** @name Crypto Functions
544 * These are the low-level cryptographic functions used by the driver. */
546 /** Perform AES CBC */
547 extern int DWC_AES_CBC(uint8_t *message, uint32_t messagelen, uint8_t *key, uint32_t keylen, uint8_t iv[16], uint8_t *out);
548 #define dwc_aes_cbc DWC_AES_CBC
550 /** Fill the provided buffer with random bytes. These should be cryptographic grade random numbers. */
551 extern void DWC_RANDOM_BYTES(uint8_t *buffer, uint32_t length);
552 #define dwc_random_bytes DWC_RANDOM_BYTES
554 /** Perform the SHA-256 hash function */
555 extern int DWC_SHA256(uint8_t *message, uint32_t len, uint8_t *out);
556 #define dwc_sha256 DWC_SHA256
558 /** Calculated the HMAC-SHA256 */
559 extern int DWC_HMAC_SHA256(uint8_t *message, uint32_t messagelen, uint8_t *key, uint32_t keylen, uint8_t *out);
560 #define dwc_hmac_sha256 DWC_HMAC_SHA256
562 #endif /* DWC_CRYPTOLIB */
565 /** @name Memory Allocation
567 * These function provide access to memory allocation. There are only 2 DMA
568 * functions and 3 Regular memory functions that need to be implemented. None
569 * of the memory debugging routines need to be implemented. The allocation
570 * routines all ZERO the contents of the memory.
572 * Defining DWC_DEBUG_MEMORY turns on memory debugging and statistic gathering.
573 * This checks for memory leaks, keeping track of alloc/free pairs. It also
574 * keeps track of how much memory the driver is using at any given time. */
576 #define DWC_PAGE_SIZE 4096
577 #define DWC_PAGE_OFFSET(addr) (((uint32_t)addr) & 0xfff)
578 #define DWC_PAGE_ALIGNED(addr) ((((uint32_t)addr) & 0xfff) == 0)
580 #define DWC_INVALID_DMA_ADDR 0x0
583 /** Type for a DMA address */
584 typedef dma_addr_t dwc_dma_t;
587 #if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
588 typedef bus_addr_t dwc_dma_t;
592 typedef struct dwc_dmactx {
594 bus_dma_tag_t dma_tag;
595 bus_dmamap_t dma_map;
596 bus_addr_t dma_paddr;
602 typedef struct dwc_dmactx {
604 bus_dma_tag_t dma_tag;
605 bus_dmamap_t dma_map;
606 bus_dma_segment_t segs[1];
608 bus_addr_t dma_paddr;
613 /* @todo these functions will be added in the future */
616 * Creates a DMA pool from which you can allocate DMA buffers. Buffers
617 * allocated from this pool will be guaranteed to meet the size, alignment, and
618 * boundary requirements specified.
620 * @param[in] size Specifies the size of the buffers that will be allocated from
622 * @param[in] align Specifies the byte alignment requirements of the buffers
623 * allocated from this pool. Must be a power of 2.
624 * @param[in] boundary Specifies the N-byte boundary that buffers allocated from
625 * this pool must not cross.
627 * @returns A pointer to an internal opaque structure which is not to be
628 * accessed outside of these library functions. Use this handle to specify
629 * which pools to allocate/free DMA buffers from and also to destroy the pool,
630 * when you are done with it.
632 extern dwc_pool_t *DWC_DMA_POOL_CREATE(uint32_t size, uint32_t align, uint32_t boundary);
635 * Destroy a DMA pool. All buffers allocated from that pool must be freed first.
637 extern void DWC_DMA_POOL_DESTROY(dwc_pool_t *pool);
640 * Allocate a buffer from the specified DMA pool and zeros its contents.
642 extern void *DWC_DMA_POOL_ALLOC(dwc_pool_t *pool, uint64_t *dma_addr);
645 * Free a previously allocated buffer from the DMA pool.
647 extern void DWC_DMA_POOL_FREE(dwc_pool_t *pool, void *vaddr, void *daddr);
650 /** Allocates a DMA capable buffer and zeroes its contents. */
651 extern void *__DWC_DMA_ALLOC(void *dma_ctx, uint32_t size, dwc_dma_t *dma_addr);
653 /** Allocates a DMA capable buffer and zeroes its contents in atomic contest */
654 extern void *__DWC_DMA_ALLOC_ATOMIC(void *dma_ctx, uint32_t size, dwc_dma_t *dma_addr);
656 /** Frees a previously allocated buffer. */
657 extern void __DWC_DMA_FREE(void *dma_ctx, uint32_t size, void *virt_addr, dwc_dma_t dma_addr);
659 /** Allocates a block of memory and zeroes its contents. */
660 extern void *__DWC_ALLOC(void *mem_ctx, uint32_t size);
662 /** Allocates a block of memory and zeroes its contents, in an atomic manner
663 * which can be used inside interrupt context. The size should be sufficiently
664 * small, a few KB at most, such that failures are not likely to occur. Can just call
665 * __DWC_ALLOC if it is atomic. */
666 extern void *__DWC_ALLOC_ATOMIC(void *mem_ctx, uint32_t size);
668 /** Frees a previously allocated buffer. */
669 extern void __DWC_FREE(void *mem_ctx, void *addr);
671 #ifndef DWC_DEBUG_MEMORY
673 #define DWC_ALLOC(_size_) __DWC_ALLOC(NULL, _size_)
674 #define DWC_ALLOC_ATOMIC(_size_) __DWC_ALLOC_ATOMIC(NULL, _size_)
675 #define DWC_FREE(_addr_) __DWC_FREE(NULL, _addr_)
678 #define DWC_DMA_ALLOC(_dev, _size_, _dma_) __DWC_DMA_ALLOC(_dev, _size_, _dma_)
679 #define DWC_DMA_ALLOC_ATOMIC(_dev, _size_, _dma_) __DWC_DMA_ALLOC_ATOMIC(_dev, _size_, _dma_)
680 #define DWC_DMA_FREE(_dev, _size_,_virt_, _dma_) __DWC_DMA_FREE(_dev, _size_, _virt_, _dma_)
683 # if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
684 #define DWC_DMA_ALLOC __DWC_DMA_ALLOC
685 #define DWC_DMA_FREE __DWC_DMA_FREE
687 extern void *dwc_dma_alloc_atomic_debug(uint32_t size, dwc_dma_t *dma_addr, char const *func, int line);
689 #else /* DWC_DEBUG_MEMORY */
691 extern void *dwc_alloc_debug(void *mem_ctx, uint32_t size, char const *func, int line);
692 extern void *dwc_alloc_atomic_debug(void *mem_ctx, uint32_t size, char const *func, int line);
693 extern void dwc_free_debug(void *mem_ctx, void *addr, char const *func, int line);
694 extern void *dwc_dma_alloc_debug(void *dma_ctx, uint32_t size, dwc_dma_t *dma_addr,
695 char const *func, int line);
696 extern void *dwc_dma_alloc_atomic_debug(void *dma_ctx, uint32_t size, dwc_dma_t *dma_addr,
697 char const *func, int line);
698 extern void dwc_dma_free_debug(void *dma_ctx, uint32_t size, void *virt_addr,
699 dwc_dma_t dma_addr, char const *func, int line);
701 extern int dwc_memory_debug_start(void *mem_ctx);
702 extern void dwc_memory_debug_stop(void);
703 extern void dwc_memory_debug_report(void);
705 #define DWC_ALLOC(_size_) dwc_alloc_debug(NULL, _size_, __func__, __LINE__)
706 #define DWC_ALLOC_ATOMIC(_size_) dwc_alloc_atomic_debug(NULL, _size_, \
708 #define DWC_FREE(_addr_) dwc_free_debug(NULL, _addr_, __func__, __LINE__)
711 #define DWC_DMA_ALLOC(_dev, _size_, _dma_) \
712 dwc_dma_alloc_debug(_dev, _size_, _dma_, __func__, __LINE__)
713 #define DWC_DMA_ALLOC_ATOMIC(_dev, _size_, _dma_) \
714 dwc_dma_alloc_atomic_debug(_dev, _size_, _dma_, __func__, __LINE__)
715 #define DWC_DMA_FREE(_dev, _size_, _virt_, _dma_) \
716 dwc_dma_free_debug(_dev, _size_, _virt_, _dma_, __func__, __LINE__)
719 # if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
720 #define DWC_DMA_ALLOC(_ctx_,_size_,_dma_) dwc_dma_alloc_debug(_ctx_, _size_, \
721 _dma_, __func__, __LINE__)
722 #define DWC_DMA_FREE(_ctx_,_size_,_virt_,_dma_) dwc_dma_free_debug(_ctx_, _size_, \
723 _virt_, _dma_, __func__, __LINE__)
726 #endif /* DWC_DEBUG_MEMORY */
728 #define dwc_alloc(_ctx_,_size_) DWC_ALLOC(_size_)
729 #define dwc_alloc_atomic(_ctx_,_size_) DWC_ALLOC_ATOMIC(_size_)
730 #define dwc_free(_ctx_,_addr_) DWC_FREE(_addr_)
733 /* Linux doesn't need any extra parameters for DMA buffer allocation, so we
734 * just throw away the DMA context parameter.
736 #define dwc_dma_alloc(_ctx_,_size_,_dma_) DWC_DMA_ALLOC(_size_, _dma_)
737 #define dwc_dma_alloc_atomic(_ctx_,_size_,_dma_) DWC_DMA_ALLOC_ATOMIC(_size_, _dma_)
738 #define dwc_dma_free(_ctx_,_size_,_virt_,_dma_) DWC_DMA_FREE(_size_, _virt_, _dma_)
741 #if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
742 /** BSD needs several extra parameters for DMA buffer allocation, so we pass
743 * them in using the DMA context parameter.
745 #define dwc_dma_alloc DWC_DMA_ALLOC
746 #define dwc_dma_free DWC_DMA_FREE
750 /** @name Memory and String Processing */
752 /** memset() clone */
753 extern void *DWC_MEMSET(void *dest, uint8_t byte, uint32_t size);
754 #define dwc_memset DWC_MEMSET
756 /** memcpy() clone */
757 extern void *DWC_MEMCPY(void *dest, void const *src, uint32_t size);
758 #define dwc_memcpy DWC_MEMCPY
760 /** memmove() clone */
761 extern void *DWC_MEMMOVE(void *dest, void *src, uint32_t size);
762 #define dwc_memmove DWC_MEMMOVE
764 /** memcmp() clone */
765 extern int DWC_MEMCMP(void *m1, void *m2, uint32_t size);
766 #define dwc_memcmp DWC_MEMCMP
768 /** strcmp() clone */
769 extern int DWC_STRCMP(void *s1, void *s2);
770 #define dwc_strcmp DWC_STRCMP
772 /** strncmp() clone */
773 extern int DWC_STRNCMP(void *s1, void *s2, uint32_t size);
774 #define dwc_strncmp DWC_STRNCMP
776 /** strlen() clone, for NULL terminated ASCII strings */
777 extern int DWC_STRLEN(char const *str);
778 #define dwc_strlen DWC_STRLEN
780 /** strcpy() clone, for NULL terminated ASCII strings */
781 extern char *DWC_STRCPY(char *to, const char *from);
782 #define dwc_strcpy DWC_STRCPY
784 /** strdup() clone. If you wish to use memory allocation debugging, this
785 * implementation of strdup should use the DWC_* memory routines instead of
786 * calling a predefined strdup. Otherwise the memory allocated by this routine
787 * will not be seen by the debugging routines. */
788 extern char *DWC_STRDUP(char const *str);
789 #define dwc_strdup(_ctx_,_str_) DWC_STRDUP(_str_)
791 /** NOT an atoi() clone. Read the description carefully. Returns an integer
792 * converted from the string str in base 10 unless the string begins with a "0x"
793 * in which case it is base 16. String must be a NULL terminated sequence of
794 * ASCII characters and may optionally begin with whitespace, a + or -, and a
795 * "0x" prefix if base 16. The remaining characters must be valid digits for
796 * the number and end with a NULL character. If any invalid characters are
797 * encountered or it returns with a negative error code and the results of the
798 * conversion are undefined. On sucess it returns 0. Overflow conditions are
799 * undefined. An example implementation using atoi() can be referenced from the
800 * Linux implementation. */
801 extern int DWC_ATOI(const char *str, int32_t *value);
802 #define dwc_atoi DWC_ATOI
804 /** Same as above but for unsigned. */
805 extern int DWC_ATOUI(const char *str, uint32_t *value);
806 #define dwc_atoui DWC_ATOUI
809 /** This routine returns a UTF16LE unicode encoded string from a UTF8 string. */
810 extern int DWC_UTF8_TO_UTF16LE(uint8_t const *utf8string, uint16_t *utf16string, unsigned len);
811 #define dwc_utf8_to_utf16le DWC_UTF8_TO_UTF16LE
815 /** @name Wait queues
817 * Wait queues provide a means of synchronizing between threads or processes. A
818 * process can block on a waitq if some condition is not true, waiting for it to
819 * become true. When the waitq is triggered all waiting process will get
820 * unblocked and the condition will be check again. Waitqs should be triggered
821 * every time a condition can potentially change.*/
824 /** Type for a waitq */
825 typedef struct dwc_waitq dwc_waitq_t;
827 /** The type of waitq condition callback function. This is called every time
828 * condition is evaluated. */
829 typedef int (*dwc_waitq_condition_t)(void *data);
831 /** Allocate a waitq */
832 extern dwc_waitq_t *DWC_WAITQ_ALLOC(void);
833 #define dwc_waitq_alloc(_ctx_) DWC_WAITQ_ALLOC()
836 extern void DWC_WAITQ_FREE(dwc_waitq_t *wq);
837 #define dwc_waitq_free DWC_WAITQ_FREE
839 /** Check the condition and if it is false, block on the waitq. When unblocked, check the
840 * condition again. The function returns when the condition becomes true. The return value
841 * is 0 on condition true, DWC_WAITQ_ABORTED on abort or killed, or DWC_WAITQ_UNKNOWN on error. */
842 extern int32_t DWC_WAITQ_WAIT(dwc_waitq_t *wq, dwc_waitq_condition_t cond, void *data);
843 #define dwc_waitq_wait DWC_WAITQ_WAIT
845 /** Check the condition and if it is false, block on the waitq. When unblocked,
846 * check the condition again. The function returns when the condition become
847 * true or the timeout has passed. The return value is 0 on condition true or
848 * DWC_TIMED_OUT on timeout, or DWC_WAITQ_ABORTED, or DWC_WAITQ_UNKNOWN on
850 extern int32_t DWC_WAITQ_WAIT_TIMEOUT(dwc_waitq_t *wq, dwc_waitq_condition_t cond,
851 void *data, int32_t msecs);
852 #define dwc_waitq_wait_timeout DWC_WAITQ_WAIT_TIMEOUT
854 /** Trigger a waitq, unblocking all processes. This should be called whenever a condition
855 * has potentially changed. */
856 extern void DWC_WAITQ_TRIGGER(dwc_waitq_t *wq);
857 #define dwc_waitq_trigger DWC_WAITQ_TRIGGER
859 /** Unblock all processes waiting on the waitq with an ABORTED result. */
860 extern void DWC_WAITQ_ABORT(dwc_waitq_t *wq);
861 #define dwc_waitq_abort DWC_WAITQ_ABORT
866 * A thread must be explicitly stopped. It must check DWC_THREAD_SHOULD_STOP
867 * whenever it is woken up, and then return. The DWC_THREAD_STOP function
868 * returns the value from the thread.
873 /** Type for a thread */
874 typedef struct dwc_thread dwc_thread_t;
876 /** The thread function */
877 typedef int (*dwc_thread_function_t)(void *data);
879 /** Create a thread and start it running the thread_function. Returns a handle
881 extern dwc_thread_t *DWC_THREAD_RUN(dwc_thread_function_t func, char *name, void *data);
882 #define dwc_thread_run(_ctx_,_func_,_name_,_data_) DWC_THREAD_RUN(_func_, _name_, _data_)
884 /** Stops a thread. Return the value returned by the thread. Or will return
885 * DWC_ABORT if the thread never started. */
886 extern int DWC_THREAD_STOP(dwc_thread_t *thread);
887 #define dwc_thread_stop DWC_THREAD_STOP
889 /** Signifies to the thread that it must stop. */
891 /* Linux doesn't need any parameters for kthread_should_stop() */
892 extern dwc_bool_t DWC_THREAD_SHOULD_STOP(void);
893 #define dwc_thread_should_stop(_thrd_) DWC_THREAD_SHOULD_STOP()
895 /* No thread_exit function in Linux */
896 #define dwc_thread_exit(_thrd_)
899 #if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
900 /** BSD needs the thread pointer for kthread_suspend_check() */
901 extern dwc_bool_t DWC_THREAD_SHOULD_STOP(dwc_thread_t *thread);
902 #define dwc_thread_should_stop DWC_THREAD_SHOULD_STOP
904 /** The thread must call this to exit. */
905 extern void DWC_THREAD_EXIT(dwc_thread_t *thread);
906 #define dwc_thread_exit DWC_THREAD_EXIT
910 /** @name Work queues
912 * Workqs are used to queue a callback function to be called at some later time,
913 * in another thread. */
916 /** Type for a workq */
917 typedef struct dwc_workq dwc_workq_t;
919 /** The type of the callback function to be called. */
920 typedef void (*dwc_work_callback_t)(void *data);
922 /** Allocate a workq */
923 extern dwc_workq_t *DWC_WORKQ_ALLOC(char *name);
924 #define dwc_workq_alloc(_ctx_,_name_) DWC_WORKQ_ALLOC(_name_)
926 /** Free a workq. All work must be completed before being freed. */
927 extern void DWC_WORKQ_FREE(dwc_workq_t *workq);
928 #define dwc_workq_free DWC_WORKQ_FREE
930 /** Schedule a callback on the workq, passing in data. The function will be
931 * scheduled at some later time. */
932 extern void DWC_WORKQ_SCHEDULE(dwc_workq_t *workq, dwc_work_callback_t cb,
933 void *data, char *format, ...)
935 __attribute__ ((format(printf, 4, 5)));
939 #define dwc_workq_schedule DWC_WORKQ_SCHEDULE
941 /** Schedule a callback on the workq, that will be called until at least
942 * given number miliseconds have passed. */
943 extern void DWC_WORKQ_SCHEDULE_DELAYED(dwc_workq_t *workq, dwc_work_callback_t cb,
944 void *data, uint32_t time, char *format, ...)
946 __attribute__ ((format(printf, 5, 6)));
950 #define dwc_workq_schedule_delayed DWC_WORKQ_SCHEDULE_DELAYED
952 /** The number of processes in the workq */
953 extern int DWC_WORKQ_PENDING(dwc_workq_t *workq);
954 #define dwc_workq_pending DWC_WORKQ_PENDING
956 /** Blocks until all the work in the workq is complete or timed out. Returns <
958 extern int DWC_WORKQ_WAIT_WORK_DONE(dwc_workq_t *workq, int timeout);
959 #define dwc_workq_wait_work_done DWC_WORKQ_WAIT_WORK_DONE
967 /** Type for a tasklet */
968 typedef struct dwc_tasklet dwc_tasklet_t;
970 /** The type of the callback function to be called */
971 typedef void (*dwc_tasklet_callback_t)(void *data);
973 /** Allocates a tasklet */
974 extern dwc_tasklet_t *DWC_TASK_ALLOC(char *name, dwc_tasklet_callback_t cb, void *data);
975 #define dwc_task_alloc(_ctx_,_name_,_cb_,_data_) DWC_TASK_ALLOC(_name_, _cb_, _data_)
977 /** Frees a tasklet */
978 extern void DWC_TASK_FREE(dwc_tasklet_t *task);
979 #define dwc_task_free DWC_TASK_FREE
981 /** Schedules a tasklet to run */
982 extern void DWC_TASK_SCHEDULE(dwc_tasklet_t *task);
983 #define dwc_task_schedule DWC_TASK_SCHEDULE
985 extern void DWC_TASK_HI_SCHEDULE(dwc_tasklet_t *task);
986 #define dwc_task_hi_schedule DWC_TASK_HI_SCHEDULE
990 * Callbacks must be small and atomic.
994 /** Type for a timer */
995 typedef struct dwc_timer dwc_timer_t;
997 /** The type of the callback function to be called */
998 typedef void (*dwc_timer_callback_t)(void *data);
1000 /** Allocates a timer */
1001 extern dwc_timer_t *DWC_TIMER_ALLOC(char *name, dwc_timer_callback_t cb, void *data);
1002 #define dwc_timer_alloc(_ctx_,_name_,_cb_,_data_) DWC_TIMER_ALLOC(_name_,_cb_,_data_)
1004 /** Frees a timer */
1005 extern void DWC_TIMER_FREE(dwc_timer_t *timer);
1006 #define dwc_timer_free DWC_TIMER_FREE
1008 /** Schedules the timer to run at time ms from now. And will repeat at every
1009 * repeat_interval msec therafter
1011 * Modifies a timer that is still awaiting execution to a new expiration time.
1012 * The mod_time is added to the old time. */
1013 extern void DWC_TIMER_SCHEDULE(dwc_timer_t *timer, uint32_t time);
1014 #define dwc_timer_schedule DWC_TIMER_SCHEDULE
1016 /** Disables the timer from execution. */
1017 extern void DWC_TIMER_CANCEL(dwc_timer_t *timer);
1018 #define dwc_timer_cancel DWC_TIMER_CANCEL
1023 * These locks are used when the work between the lock/unlock is atomic and
1024 * short. Interrupts are also disabled during the lock/unlock and thus they are
1025 * suitable to lock between interrupt/non-interrupt context. They also lock
1026 * between processes if you have multiple CPUs or Preemption. If you don't have
1027 * multiple CPUS or Preemption, then the you can simply implement the
1028 * DWC_SPINLOCK and DWC_SPINUNLOCK to disable and enable interrupts. Because
1029 * the work between the lock/unlock is atomic, the process context will never
1030 * change, and so you never have to lock between processes. */
1032 struct dwc_spinlock;
1034 /** Type for a spinlock */
1035 typedef struct dwc_spinlock dwc_spinlock_t;
1037 /** Type for the 'flags' argument to spinlock funtions */
1038 typedef unsigned long dwc_irqflags_t;
1040 /** Returns an initialized lock variable. This function should allocate and
1041 * initialize the OS-specific data structure used for locking. This data
1042 * structure is to be used for the DWC_LOCK and DWC_UNLOCK functions and should
1043 * be freed by the DWC_FREE_LOCK when it is no longer used.
1045 * For Linux Spinlock Debugging make it macro because the debugging routines use
1046 * the symbol name to determine recursive locking. Using a wrapper function
1047 * makes it falsely think recursive locking occurs. */
1048 #if defined(DWC_LINUX) && defined(CONFIG_DEBUG_SPINLOCK)
1049 #define DWC_SPINLOCK_ALLOC_LINUX_DEBUG(lock) ({ \
1050 lock = DWC_ALLOC(sizeof(spinlock_t)); \
1052 spin_lock_init((spinlock_t *)lock); \
1056 extern dwc_spinlock_t *DWC_SPINLOCK_ALLOC(void);
1057 #define dwc_spinlock_alloc(_ctx_) DWC_SPINLOCK_ALLOC()
1060 /** Frees an initialized lock variable. */
1061 extern void DWC_SPINLOCK_FREE(dwc_spinlock_t *lock);
1062 #define dwc_spinlock_free(_ctx_,_lock_) DWC_SPINLOCK_FREE(_lock_)
1064 /** Disables interrupts and blocks until it acquires the lock.
1066 * @param lock Pointer to the spinlock.
1067 * @param flags Unsigned long for irq flags storage.
1069 extern void DWC_SPINLOCK_IRQSAVE(dwc_spinlock_t *lock, dwc_irqflags_t *flags);
1070 #define dwc_spinlock_irqsave DWC_SPINLOCK_IRQSAVE
1072 /** Re-enables the interrupt and releases the lock.
1074 * @param lock Pointer to the spinlock.
1075 * @param flags Unsigned long for irq flags storage. Must be the same as was
1076 * passed into DWC_LOCK.
1078 extern void DWC_SPINUNLOCK_IRQRESTORE(dwc_spinlock_t *lock, dwc_irqflags_t flags);
1079 #define dwc_spinunlock_irqrestore DWC_SPINUNLOCK_IRQRESTORE
1081 /** Blocks until it acquires the lock.
1083 * @param lock Pointer to the spinlock.
1085 extern void DWC_SPINLOCK(dwc_spinlock_t *lock);
1086 #define dwc_spinlock DWC_SPINLOCK
1088 /** Releases the lock.
1090 * @param lock Pointer to the spinlock.
1092 extern void DWC_SPINUNLOCK(dwc_spinlock_t *lock);
1093 #define dwc_spinunlock DWC_SPINUNLOCK
1098 * Unlike spinlocks Mutexes lock only between processes and the work between the
1099 * lock/unlock CAN block, therefore it CANNOT be called from interrupt context.
1104 /** Type for a mutex */
1105 typedef struct dwc_mutex dwc_mutex_t;
1107 /* For Linux Mutex Debugging make it inline because the debugging routines use
1108 * the symbol to determine recursive locking. This makes it falsely think
1109 * recursive locking occurs. */
1110 #if defined(DWC_LINUX) && defined(CONFIG_DEBUG_MUTEXES)
1111 #define DWC_MUTEX_ALLOC_LINUX_DEBUG(__mutexp) ({ \
1112 __mutexp = (dwc_mutex_t *)DWC_ALLOC(sizeof(struct mutex)); \
1113 mutex_init((struct mutex *)__mutexp); \
1117 /** Allocate a mutex */
1118 extern dwc_mutex_t *DWC_MUTEX_ALLOC(void);
1119 #define dwc_mutex_alloc(_ctx_) DWC_MUTEX_ALLOC()
1121 /* For memory leak debugging when using Linux Mutex Debugging */
1122 #if defined(DWC_LINUX) && defined(CONFIG_DEBUG_MUTEXES)
1123 #define DWC_MUTEX_FREE(__mutexp) do { \
1124 mutex_destroy((struct mutex *)__mutexp); \
1125 DWC_FREE(__mutexp); \
1129 extern void DWC_MUTEX_FREE(dwc_mutex_t *mutex);
1130 #define dwc_mutex_free(_ctx_,_mutex_) DWC_MUTEX_FREE(_mutex_)
1134 extern void DWC_MUTEX_LOCK(dwc_mutex_t *mutex);
1135 #define dwc_mutex_lock DWC_MUTEX_LOCK
1137 /** Non-blocking lock returns 1 on successful lock. */
1138 extern int DWC_MUTEX_TRYLOCK(dwc_mutex_t *mutex);
1139 #define dwc_mutex_trylock DWC_MUTEX_TRYLOCK
1141 /** Unlock a mutex */
1142 extern void DWC_MUTEX_UNLOCK(dwc_mutex_t *mutex);
1143 #define dwc_mutex_unlock DWC_MUTEX_UNLOCK
1148 /** Microsecond delay.
1150 * @param usecs Microseconds to delay.
1152 extern void DWC_UDELAY(uint32_t usecs);
1153 #define dwc_udelay DWC_UDELAY
1155 /** Millisecond delay.
1157 * @param msecs Milliseconds to delay.
1159 extern void DWC_MDELAY(uint32_t msecs);
1160 #define dwc_mdelay DWC_MDELAY
1162 /** Non-busy waiting.
1163 * Sleeps for specified number of milliseconds.
1165 * @param msecs Milliseconds to sleep.
1167 extern void DWC_MSLEEP(uint32_t msecs);
1168 #define dwc_msleep DWC_MSLEEP
1171 * Returns number of milliseconds since boot.
1173 extern uint32_t DWC_TIME(void);
1174 #define dwc_time DWC_TIME
1179 /* @mainpage DWC Portability and Common Library
1181 * This is the documentation for the DWC Portability and Common Library.
1183 * @section intro Introduction
1185 * The DWC Portability library consists of wrapper calls and data structures to
1186 * all low-level functions which are typically provided by the OS. The WUDEV
1187 * driver uses only these functions. In order to port the WUDEV driver, only
1188 * the functions in this library need to be re-implemented, with the same
1189 * behavior as documented here.
1191 * The Common library consists of higher level functions, which rely only on
1192 * calling the functions from the DWC Portability library. These common
1193 * routines are shared across modules. Some of the common libraries need to be
1194 * used directly by the driver programmer when porting WUDEV. Such as the
1195 * parameter and notification libraries.
1197 * @section low Portability Library OS Wrapper Functions
1199 * Any function starting with DWC and in all CAPS is a low-level OS-wrapper that
1200 * needs to be implemented when porting, for example DWC_MUTEX_ALLOC(). All of
1201 * these functions are included in the dwc_os.h file.
1203 * There are many functions here covering a wide array of OS services. Please
1204 * see dwc_os.h for details, and implementation notes for each function.
1206 * @section common Common Library Functions
1208 * Any function starting with dwc and in all lowercase is a common library
1209 * routine. These functions have a portable implementation and do not need to
1210 * be reimplemented when porting. The common routines can be used by any
1211 * driver, and some must be used by the end user to control the drivers. For
1212 * example, you must use the Parameter common library in order to set the
1213 * parameters in the WUDEV module.
1215 * The common libraries consist of the following:
1217 * - Connection Contexts - Used internally and can be used by end-user. See dwc_cc.h
1218 * - Parameters - Used internally and can be used by end-user. See dwc_params.h
1219 * - Notifications - Used internally and can be used by end-user. See dwc_notifier.h
1220 * - Lists - Used internally and can be used by end-user. See dwc_list.h
1221 * - Memory Debugging - Used internally and can be used by end-user. See dwc_os.h
1222 * - Modpow - Used internally only. See dwc_modpow.h
1223 * - DH - Used internally only. See dwc_dh.h
1224 * - Crypto - Used internally only. See dwc_crypto.h
1227 * @section prereq Prerequistes For dwc_os.h
1228 * @subsection types Data Types
1230 * The dwc_os.h file assumes that several low-level data types are pre defined for the
1231 * compilation environment. These data types are:
1233 * - uint8_t - unsigned 8-bit data type
1234 * - int8_t - signed 8-bit data type
1235 * - uint16_t - unsigned 16-bit data type
1236 * - int16_t - signed 16-bit data type
1237 * - uint32_t - unsigned 32-bit data type
1238 * - int32_t - signed 32-bit data type
1239 * - uint64_t - unsigned 64-bit data type
1240 * - int64_t - signed 64-bit data type
1242 * Ensure that these are defined before using dwc_os.h. The easiest way to do
1243 * that is to modify the top of the file to include the appropriate header.
1244 * This is already done for the Linux environment. If the DWC_LINUX macro is
1245 * defined, the correct header will be added. A standard header <stdint.h> is
1246 * also used for environments where standard C headers are available.
1248 * @subsection stdarg Variable Arguments
1250 * Variable arguments are provided by a standard C header <stdarg.h>. it is
1251 * available in Both the Linux and ANSI C enviornment. An equivalent must be
1252 * provided in your enviornment in order to use dwc_os.h with the debug and
1253 * tracing message functionality.
1255 * @subsection thread Threading
1257 * WUDEV Core must be run on an operating system that provides for multiple
1258 * threads/processes. Threading can be implemented in many ways, even in
1259 * embedded systems without an operating system. At the bare minimum, the
1260 * system should be able to start any number of processes at any time to handle
1261 * special work. It need not be a pre-emptive system. Process context can
1262 * change upon a call to a blocking function. The hardware interrupt context
1263 * that calls the module's ISR() function must be differentiable from process
1264 * context, even if your processes are impemented via a hardware interrupt.
1265 * Further locking mechanism between process must exist (or be implemented), and
1266 * process context must have a way to disable interrupts for a period of time to
1267 * lock them out. If all of this exists, the functions in dwc_os.h related to
1268 * threading should be able to be implemented with the defined behavior.
1276 #endif /* _DWC_OS_H_ */