u-boot/include/linux/compat.h
Lijun Pan 8f2df5d369 linux/compat.h: port lower_32_bits and upper_32_bits from Linux
[backport from linux commit 204b885e and 218e180e7]
64 bit processors are becomming more and more popular.
lower_32_bits and upper_32_bits save our labor doing
shifts/manipulations like (u32)(n) and (u32)((n) >> 32).
They are good helpers in both little and big endian cases.
Port these two functions here from Linux:include/linux/kernel.h,
cater the comment message to little/big endian cases.
Later on, developers could include linux/compat.h if they want to
use these two functions.

Signed-off-by: Lijun Pan <Lijun.Pan@freescale.com>
2014-07-22 07:44:24 -04:00

79 lines
2 KiB
C

#ifndef _LINUX_COMPAT_H_
#define _LINUX_COMPAT_H_
#define ndelay(x) udelay(1)
#define dev_dbg(dev, fmt, args...) \
debug(fmt, ##args)
#define dev_vdbg(dev, fmt, args...) \
debug(fmt, ##args)
#define dev_info(dev, fmt, args...) \
printf(fmt, ##args)
#define dev_err(dev, fmt, args...) \
printf(fmt, ##args)
#define printk printf
#define KERN_EMERG
#define KERN_ALERT
#define KERN_CRIT
#define KERN_ERR
#define KERN_WARNING
#define KERN_NOTICE
#define KERN_INFO
#define KERN_DEBUG
#define kmalloc(size, flags) malloc(size)
#define kzalloc(size, flags) calloc(size, 1)
#define vmalloc(size) malloc(size)
#define kfree(ptr) free(ptr)
#define vfree(ptr) free(ptr)
#define DECLARE_WAITQUEUE(...) do { } while (0)
#define add_wait_queue(...) do { } while (0)
#define remove_wait_queue(...) do { } while (0)
#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
/*
* ..and if you can't take the strict
* types, you can specify one yourself.
*
* Or not use min/max at all, of course.
*/
#define min_t(type,x,y) \
({ type __x = (x); type __y = (y); __x < __y ? __x: __y; })
#define max_t(type,x,y) \
({ type __x = (x); type __y = (y); __x > __y ? __x: __y; })
#ifndef BUG
#define BUG() do { \
printf("U-Boot BUG at %s:%d!\n", __FILE__, __LINE__); \
} while (0)
#define BUG_ON(condition) do { if (condition) BUG(); } while(0)
#endif /* BUG */
#define WARN_ON(x) if (x) {printf("WARNING in %s line %d\n" \
, __FILE__, __LINE__); }
#define PAGE_SIZE 4096
/**
* upper_32_bits - return MSB bits 32-63 of a number if little endian, or
* return MSB bits 0-31 of a number if big endian.
* @n: the number we're accessing
*
* A basic shift-right of a 64- or 32-bit quantity. Use this to suppress
* the "right shift count >= width of type" warning when that quantity is
* 32-bits.
*/
#define upper_32_bits(n) ((u32)(((n) >> 16) >> 16))
/**
* lower_32_bits - return LSB bits 0-31 of a number if little endian, or
* return LSB bits 32-63 of a number if big endian.
* @n: the number we're accessing
*/
#define lower_32_bits(n) ((u32)(n))
#endif