bits.h File Reference

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Macros
#define	BIT(nr)   (1UL << (nr))
#define	BIT_MASK(nr)   (1UL << ((nr) % BITS_PER_LONG))
#define	BIT_ULL(nr)   (1ULL << (nr))
#define	BIT_WORD(nr)   ((nr) / BITS_PER_LONG)
#define	BITS_PER_BYTE   8
#define	BITS_PER_LONG   (BITS_PER_BYTE * sizeof(long))
#define	BITS_PER_LONG_LONG   (BITS_PER_BYTE * sizeof(long long))
#define	BITS_TO_LONGS(nr)   DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
#define	DECLARE_BITMAP(name, bits)   unsigned long name[BITS_TO_LONGS(bits)]
#define	GENMASK(h, l)   (((~0UL) - (1UL << (l)) + 1) & (~0UL >> (BITS_PER_LONG - 1 - (h))))
#define	GENMASK_ULL(h, l)   (((~0ULL) - (1ULL << (l)) + 1) & (~0ULL >> (BITS_PER_LONG_LONG - 1 - (h))))

Functions
static void	bitmap_zero (unsigned long *dst, unsigned int nbits)
	bitmap_zero - Clears all the bits in memory More...
static void	clear_bit (unsigned int nr, volatile unsigned long *addr)
	clear_bit - Clear a bit in memory More...
static void	set_bit (unsigned int nr, volatile unsigned long *addr)
	set_bit - Set a bit in memory More...
static int	test_bit (unsigned int nr, const volatile unsigned long *addr)
	test_bit - Determine whether a bit is set More...

Macro Definition Documentation

BIT

#define BIT

(

nr

)

(1UL << (nr))

Definition at line 19 of file bits.h.

BIT_MASK

#define BIT_MASK

(

nr

)

(1UL << ((nr) % BITS_PER_LONG))

Definition at line 27 of file bits.h.

BIT_ULL

#define BIT_ULL

(

nr

)

(1ULL << (nr))

Definition at line 20 of file bits.h.

BIT_WORD

#define BIT_WORD

(

nr

)

((nr) / BITS_PER_LONG)

Definition at line 28 of file bits.h.

BITS_PER_BYTE

#define BITS_PER_BYTE   8

Definition at line 21 of file bits.h.

BITS_PER_LONG

#define BITS_PER_LONG   (BITS_PER_BYTE * sizeof(long))

Definition at line 22 of file bits.h.

BITS_PER_LONG_LONG

#define BITS_PER_LONG_LONG   (BITS_PER_BYTE * sizeof(long long))

Definition at line 23 of file bits.h.

BITS_TO_LONGS

#define BITS_TO_LONGS

(

nr

)

DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))

Definition at line 26 of file bits.h.

DECLARE_BITMAP

#define DECLARE_BITMAP	(		name,
			bits
	)		unsigned long name[BITS_TO_LONGS(bits)]

Definition at line 29 of file bits.h.

GENMASK

#define GENMASK	(		h,
			l
	)		(((~0UL) - (1UL << (l)) + 1) & (~0UL >> (BITS_PER_LONG - 1 - (h))))

Definition at line 24 of file bits.h.

GENMASK_ULL

#define GENMASK_ULL	(		h,
			l
	)		(((~0ULL) - (1ULL << (l)) + 1) & (~0ULL >> (BITS_PER_LONG_LONG - 1 - (h))))

Definition at line 25 of file bits.h.

Function Documentation

bitmap_zero()

static void bitmap_zero ( unsigned long *  dst, unsigned int  nbits  )

inlinestatic

bitmap_zero - Clears all the bits in memory

Parameters

dst	the address of the bitmap
nbits	the number of bits to clear

Definition at line 36 of file bits.h.

References BITS_TO_LONGS.

Referenced by COMMAND_HANDLER(), and stm32l4_protect_same_bank().

clear_bit()

static void clear_bit ( unsigned int  nr, volatile unsigned long *  addr  )

inlinestatic

clear_bit - Clear a bit in memory

Parameters

nr	the bit to set
addr	the address to start counting from

Definition at line 47 of file bits.h.

References addr, BIT_MASK, BIT_WORD, and mask.

Referenced by stlink_dap_closeall_ap(), stlink_dap_reinit_interface(), and stm32l4_protect_same_bank().

set_bit()

static void set_bit ( unsigned int  nr, volatile unsigned long *  addr  )

inlinestatic

set_bit - Set a bit in memory

Parameters

nr	the bit to set
addr	the address to start counting from

Definition at line 60 of file bits.h.

References addr, BIT_MASK, BIT_WORD, and mask.

Referenced by COMMAND_HANDLER(), stlink_usb_open_ap(), and stm32l4_protect_same_bank().

test_bit()

static int test_bit ( unsigned int  nr, const volatile unsigned long *  addr  )

inlinestatic

test_bit - Determine whether a bit is set

Parameters

nr	bit number to test
addr	Address to start counting from

Definition at line 73 of file bits.h.

References addr, BIT_WORD, and BITS_PER_LONG.

Referenced by bitmap_to_ranges(), rsl10_protect_check(), stlink_dap_closeall_ap(), stlink_dap_reinit_interface(), and stlink_usb_open_ap().