openwrt-xburst/package/linux/kernel-source/include/bcmutils.h

/*
 * Misc useful os-independent macros and functions.
 *
 * Copyright 2004, Broadcom Corporation
 * All Rights Reserved.
 * 
 * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
 * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
 * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
 * $Id$
 */

#ifndef	_bcmutils_h_
#define	_bcmutils_h_

#ifndef MIN
#define	MIN(a, b)		(((a)<(b))?(a):(b))
#endif

#ifndef MAX
#define	MAX(a, b)		(((a)>(b))?(a):(b))
#endif

#define CEIL(x, y)		(((x) + ((y)-1)) / (y))
#define	ROUNDUP(x, y)		((((ulong)(x)+((y)-1))/(y))*(y))
#define	ISALIGNED(a, x)		(((uint)(a) & ((x)-1)) == 0)
#define	ISPOWEROF2(x)		((((x)-1)&(x))==0)
#define	OFFSETOF(type, member)	((uint) &((type *)0)->member)
#define ARRAYSIZE(a)		(sizeof(a)/sizeof(a[0]))

/* bit map related macros */
#ifndef setbit
#define	NBBY	8	/* 8 bits per byte */
#define	setbit(a,i)	((a)[(i)/NBBY] |= 1<<((i)%NBBY))
#define	clrbit(a,i)	((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
#define	isset(a,i)	((a)[(i)/NBBY] & (1<<((i)%NBBY)))
#define	isclr(a,i)	(((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
#endif

#define	NBITS(type)	(sizeof (type) * 8)

#define _BCM_U	0x01	/* upper */
#define _BCM_L	0x02	/* lower */
#define _BCM_D	0x04	/* digit */
#define _BCM_C	0x08	/* cntrl */
#define _BCM_P	0x10	/* punct */
#define _BCM_S	0x20	/* white space (space/lf/tab) */
#define _BCM_X	0x40	/* hex digit */
#define _BCM_SP	0x80	/* hard space (0x20) */

extern unsigned char bcm_ctype[];
#define bcm_ismask(x) (bcm_ctype[(int)(unsigned char)(x)])

#define bcm_isalnum(c)	((bcm_ismask(c)&(_BCM_U|_BCM_L|_BCM_D)) != 0)
#define bcm_isalpha(c)	((bcm_ismask(c)&(_BCM_U|_BCM_L)) != 0)
#define bcm_iscntrl(c)	((bcm_ismask(c)&(_BCM_C)) != 0)
#define bcm_isdigit(c)	((bcm_ismask(c)&(_BCM_D)) != 0)
#define bcm_isgraph(c)	((bcm_ismask(c)&(_BCM_P|_BCM_U|_BCM_L|_BCM_D)) != 0)
#define bcm_islower(c)	((bcm_ismask(c)&(_BCM_L)) != 0)
#define bcm_isprint(c)	((bcm_ismask(c)&(_BCM_P|_BCM_U|_BCM_L|_BCM_D|_BCM_SP)) != 0)
#define bcm_ispunct(c)	((bcm_ismask(c)&(_BCM_P)) != 0)
#define bcm_isspace(c)	((bcm_ismask(c)&(_BCM_S)) != 0)
#define bcm_isupper(c)	((bcm_ismask(c)&(_BCM_U)) != 0)
#define bcm_isxdigit(c)	((bcm_ismask(c)&(_BCM_D|_BCM_X)) != 0)

/*
 * Spin at most 'us' microseconds while 'exp' is true.
 * Caller should explicitly test 'exp' when this completes
 * and take appropriate error action if 'exp' is still true.
 */
#define SPINWAIT(exp, us) { \
	uint countdown = (us) + 9; \
	while ((exp) && (countdown >= 10)) {\
		OSL_DELAY(10); \
		countdown -= 10; \
	} \
}

/* generic osl packet queue */
struct pktq {
	void *head;	/* first packet to dequeue */
	void *tail;	/* last packet to dequeue */
	uint len;	/* number of queued packets */
	uint maxlen;	/* maximum number of queued packets */
	bool priority;	/* enqueue by packet priority */
};
#define DEFAULT_QLEN	128

#define	pktq_len(q)	((q)->len)
#define	pktq_avail(q)	((q)->maxlen - (q)->len)
#define	pktq_head(q)	((q)->head)
#define	pktq_full(q)	((q)->len >= (q)->maxlen)

/* crc defines */
#define CRC8_INIT_VALUE  0xff		/* Initial CRC8 checksum value */
#define CRC8_GOOD_VALUE  0x9f		/* Good final CRC8 checksum value */
#define CRC16_INIT_VALUE 0xffff		/* Initial CRC16 checksum value */
#define CRC16_GOOD_VALUE 0xf0b8		/* Good final CRC16 checksum value */
#define CRC32_INIT_VALUE 0xffffffff	/* Initial CRC32 checksum value */
#define CRC32_GOOD_VALUE 0xdebb20e3	/* Good final CRC32 checksum value */

/* tag_ID/length/value_buffer tuple */
typedef struct bcm_tlv {
	uint8	id;
	uint8	len;
	uint8	data[1];
} bcm_tlv_t;

/* Check that bcm_tlv_t fits into the given buflen */
#define bcm_valid_tlv(elt, buflen) ((buflen) >= 2 && (buflen) >= 2 + (elt)->len)

/* buffer length for ethernet address from bcm_ether_ntoa() */
#define ETHER_ADDR_STR_LEN	18

/*
* load 32-bit value from unaligned byte array
*/
#ifdef IL_BIGENDIAN
#define load32_ua(a)	((((uint8 *)(a))[0] << 24) + (((uint8 *)(a))[1] << 16) + \
			(((uint8 *)(a))[2] << 8) + ((uint8 *)(a))[3])
#else
#define load32_ua(a)	((((uint8 *)(a))[3] << 24) + (((uint8 *)(a))[2] << 16) + \
			(((uint8 *)(a))[1] << 8) + ((uint8 *)(a))[0])
#endif

/* externs */
extern uint bcm_atoi(char *s);
extern uchar bcm_toupper(uchar c);
extern ulong bcm_strtoul(char *cp, char **endp, uint base);
extern void deadbeef(char *p, uint len);
extern void prhex(char *msg, uchar *buf, uint len);
extern void prpkt(char *msg, void *drv, void *p0);
extern uint pktcopy(void *drv, void *p, uint offset, int len, uchar *buf);
extern uint pkttotlen(void *drv, void *);
extern uchar *bcm_ether_ntoa(char *ea, char *buf);
extern int bcm_ether_atoe(char *p, char *ea);
extern void bcm_mdelay(uint ms);
extern char *getvar(char *vars, char *name);
extern int getintvar(char *vars, char *name);
extern char *bcmstrstr(char *haystack, char *needle);

extern uint8 crc8(uint8 *p, uint nbytes, uint8 crc);
extern uint16 crc16(uint8 *p, uint nbytes, uint16 crc);
extern uint32 crc32(uint8 *p, uint nbytes, uint32 crc);
extern bcm_tlv_t *bcm_next_tlv(bcm_tlv_t *elt, int *buflen);
extern bcm_tlv_t *bcm_parse_tlvs(void *buf, int buflen, uint key);
extern bcm_tlv_t *bcm_parse_ordered_tlvs(void *buf, int buflen, uint key);
extern void pktq_init(struct pktq *q, uint maxlen, bool priority);
extern bool pktenq(struct pktq *q, void *p, bool lifo);
extern void *pktdeq(struct pktq *q);

#define	bcmlog(fmt, a1, a2)
#define	bcmdumplog(buf, size)	*buf = '\0'
#define	bcmdumplogent(buf, idx)	-1

#endif	/* _bcmutils_h_ */