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5270 serge 1 
/**
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 * \file drm_os_linux.h
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 * OS abstraction macros.
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 */
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6102 serge 6 
#include 	/* For task queue support */
5270 serge 7 
#include
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#ifndef readq
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static inline u64 readq(void __iomem *reg)
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{
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	return ((u64) readl(reg)) | (((u64) readl(reg + 4UL)) << 32);
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}
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static inline void writeq(u64 val, void __iomem *reg)
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{
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	writel(val & 0xffffffff, reg);
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	writel(val >> 32, reg + 0x4UL);
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}
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#endif
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/** Current process ID */
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#define DRM_CURRENTPID			task_pid_nr(current)
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#define DRM_UDELAY(d)			udelay(d)
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/** Read a byte from a MMIO region */
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#define DRM_READ8(map, offset)		readb(((void __iomem *)(map)->handle) + (offset))
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/** Read a word from a MMIO region */
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#define DRM_READ16(map, offset)         readw(((void __iomem *)(map)->handle) + (offset))
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/** Read a dword from a MMIO region */
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#define DRM_READ32(map, offset)		readl(((void __iomem *)(map)->handle) + (offset))
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/** Write a byte into a MMIO region */
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#define DRM_WRITE8(map, offset, val)	writeb(val, ((void __iomem *)(map)->handle) + (offset))
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/** Write a word into a MMIO region */
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#define DRM_WRITE16(map, offset, val)   writew(val, ((void __iomem *)(map)->handle) + (offset))
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/** Write a dword into a MMIO region */
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#define DRM_WRITE32(map, offset, val)	writel(val, ((void __iomem *)(map)->handle) + (offset))
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/** Read a qword from a MMIO region - be careful using these unless you really understand them */
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#define DRM_READ64(map, offset)		readq(((void __iomem *)(map)->handle) + (offset))
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/** Write a qword into a MMIO region */
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#define DRM_WRITE64(map, offset, val)	writeq(val, ((void __iomem *)(map)->handle) + (offset))
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#define DRM_WAIT_ON( ret, queue, timeout, condition )		\
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do {								\
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	DECLARE_WAITQUEUE(entry, current);			\
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	unsigned long end = jiffies + (timeout);		\
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	add_wait_queue(&(queue), &entry);			\
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								\
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	for (;;) {						\
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		__set_current_state(TASK_INTERRUPTIBLE);	\
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		if (condition)					\
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			break;					\
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		if (time_after_eq(jiffies, end)) {		\
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			ret = -EBUSY;				\
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			break;					\
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		}						\
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		schedule_timeout((HZ/100 > 1) ? HZ/100 : 1);	\
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		if (signal_pending(current)) {			\
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			ret = -EINTR;				\
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			break;					\
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		}						\
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	}							\
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	__set_current_state(TASK_RUNNING);			\
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	remove_wait_queue(&(queue), &entry);			\
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} while (0)