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