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