mirror of
https://github.com/smaeul/u-boot.git
synced 2025-10-30 03:28:16 +00:00
8bde7f776c
- remove trailing white space, trailing empty lines, C++ comments, etc.
- split cmd_boot.c (separate cmd_bdinfo.c and cmd_load.c)
* Patches by Kenneth Johansson, 25 Jun 2003:
- major rework of command structure
(work done mostly by Michal Cendrowski and Joakim Kristiansen)
145 lines
3.9 KiB
C
145 lines
3.9 KiB
C
/*
|
|
* Copyright 1995, Russell King.
|
|
* Various bits and pieces copyrights include:
|
|
* Linus Torvalds (test_bit).
|
|
*
|
|
* bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1).
|
|
*
|
|
* Please note that the code in this file should never be included
|
|
* from user space. Many of these are not implemented in assembler
|
|
* since they would be too costly. Also, they require priviledged
|
|
* instructions (which are not available from user mode) to ensure
|
|
* that they are atomic.
|
|
*/
|
|
|
|
#ifndef __ASM_ARM_BITOPS_H
|
|
#define __ASM_ARM_BITOPS_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#define smp_mb__before_clear_bit() do { } while (0)
|
|
#define smp_mb__after_clear_bit() do { } while (0)
|
|
|
|
/*
|
|
* Function prototypes to keep gcc -Wall happy.
|
|
*/
|
|
extern void set_bit(int nr, volatile void * addr);
|
|
|
|
static inline void __set_bit(int nr, volatile void *addr)
|
|
{
|
|
((unsigned char *) addr)[nr >> 3] |= (1U << (nr & 7));
|
|
}
|
|
|
|
extern void clear_bit(int nr, volatile void * addr);
|
|
|
|
static inline void __clear_bit(int nr, volatile void *addr)
|
|
{
|
|
((unsigned char *) addr)[nr >> 3] &= ~(1U << (nr & 7));
|
|
}
|
|
|
|
extern void change_bit(int nr, volatile void * addr);
|
|
|
|
static inline void __change_bit(int nr, volatile void *addr)
|
|
{
|
|
((unsigned char *) addr)[nr >> 3] ^= (1U << (nr & 7));
|
|
}
|
|
|
|
extern int test_and_set_bit(int nr, volatile void * addr);
|
|
|
|
static inline int __test_and_set_bit(int nr, volatile void *addr)
|
|
{
|
|
unsigned int mask = 1 << (nr & 7);
|
|
unsigned int oldval;
|
|
|
|
oldval = ((unsigned char *) addr)[nr >> 3];
|
|
((unsigned char *) addr)[nr >> 3] = oldval | mask;
|
|
return oldval & mask;
|
|
}
|
|
|
|
extern int test_and_clear_bit(int nr, volatile void * addr);
|
|
|
|
static inline int __test_and_clear_bit(int nr, volatile void *addr)
|
|
{
|
|
unsigned int mask = 1 << (nr & 7);
|
|
unsigned int oldval;
|
|
|
|
oldval = ((unsigned char *) addr)[nr >> 3];
|
|
((unsigned char *) addr)[nr >> 3] = oldval & ~mask;
|
|
return oldval & mask;
|
|
}
|
|
|
|
extern int test_and_change_bit(int nr, volatile void * addr);
|
|
|
|
static inline int __test_and_change_bit(int nr, volatile void *addr)
|
|
{
|
|
unsigned int mask = 1 << (nr & 7);
|
|
unsigned int oldval;
|
|
|
|
oldval = ((unsigned char *) addr)[nr >> 3];
|
|
((unsigned char *) addr)[nr >> 3] = oldval ^ mask;
|
|
return oldval & mask;
|
|
}
|
|
|
|
extern int find_first_zero_bit(void * addr, unsigned size);
|
|
extern int find_next_zero_bit(void * addr, int size, int offset);
|
|
|
|
/*
|
|
* This routine doesn't need to be atomic.
|
|
*/
|
|
static inline int test_bit(int nr, const void * addr)
|
|
{
|
|
return ((unsigned char *) addr)[nr >> 3] & (1U << (nr & 7));
|
|
}
|
|
|
|
/*
|
|
* ffz = Find First Zero in word. Undefined if no zero exists,
|
|
* so code should check against ~0UL first..
|
|
*/
|
|
static inline unsigned long ffz(unsigned long word)
|
|
{
|
|
int k;
|
|
|
|
word = ~word;
|
|
k = 31;
|
|
if (word & 0x0000ffff) { k -= 16; word <<= 16; }
|
|
if (word & 0x00ff0000) { k -= 8; word <<= 8; }
|
|
if (word & 0x0f000000) { k -= 4; word <<= 4; }
|
|
if (word & 0x30000000) { k -= 2; word <<= 2; }
|
|
if (word & 0x40000000) { k -= 1; }
|
|
return k;
|
|
}
|
|
|
|
/*
|
|
* ffs: find first bit set. This is defined the same way as
|
|
* the libc and compiler builtin ffs routines, therefore
|
|
* differs in spirit from the above ffz (man ffs).
|
|
*/
|
|
|
|
#define ffs(x) generic_ffs(x)
|
|
|
|
/*
|
|
* hweightN: returns the hamming weight (i.e. the number
|
|
* of bits set) of a N-bit word
|
|
*/
|
|
|
|
#define hweight32(x) generic_hweight32(x)
|
|
#define hweight16(x) generic_hweight16(x)
|
|
#define hweight8(x) generic_hweight8(x)
|
|
|
|
#define ext2_set_bit test_and_set_bit
|
|
#define ext2_clear_bit test_and_clear_bit
|
|
#define ext2_test_bit test_bit
|
|
#define ext2_find_first_zero_bit find_first_zero_bit
|
|
#define ext2_find_next_zero_bit find_next_zero_bit
|
|
|
|
/* Bitmap functions for the minix filesystem. */
|
|
#define minix_test_and_set_bit(nr,addr) test_and_set_bit(nr,addr)
|
|
#define minix_set_bit(nr,addr) set_bit(nr,addr)
|
|
#define minix_test_and_clear_bit(nr,addr) test_and_clear_bit(nr,addr)
|
|
#define minix_test_bit(nr,addr) test_bit(nr,addr)
|
|
#define minix_find_first_zero_bit(addr,size) find_first_zero_bit(addr,size)
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _ARM_BITOPS_H */
|