projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /** |
| 2 | * \file drm_os_linux.h | |
| 3 | * OS abstraction macros. | |
| 4 | */ | |
| 5 | ||
| 1da177e4 LT |
6 | #include <linux/interrupt.h> /* For task queue support */ |
| 7 | #include <linux/delay.h> | |
| 8 | ||
| 87f0da55 | 9 | #ifndef readq |
| 522b5cc7 | 10 | static inline u64 readq(void __iomem *reg) |
| 87f0da55 DA |
11 | { |
| 12 | return ((u64) readl(reg)) | (((u64) readl(reg + 4UL)) << 32); | |
| 13 | } | |
| 14 | ||
| 522b5cc7 | 15 | static inline void writeq(u64 val, void __iomem *reg) |
| 87f0da55 DA |
16 | { |
| 17 | writel(val & 0xffffffff, reg); | |
| 18 | writel(val >> 32, reg + 0x4UL); | |
| 19 | } | |
| 20 | #endif | |
| 21 | ||
| 1da177e4 | 22 | /** Current process ID */ |
| ba25f9dc | 23 | #define DRM_CURRENTPID task_pid_nr(current) |
| 1da177e4 LT |
24 | #define DRM_UDELAY(d) udelay(d) |
| 25 | /** Read a byte from a MMIO region */ | |
| 26 | #define DRM_READ8(map, offset) readb(((void __iomem *)(map)->handle) + (offset)) | |
| 27 | /** Read a word from a MMIO region */ | |
| 28 | #define DRM_READ16(map, offset) readw(((void __iomem *)(map)->handle) + (offset)) | |
| 29 | /** Read a dword from a MMIO region */ | |
| 30 | #define DRM_READ32(map, offset) readl(((void __iomem *)(map)->handle) + (offset)) | |
| 31 | /** Write a byte into a MMIO region */ | |
| 32 | #define DRM_WRITE8(map, offset, val) writeb(val, ((void __iomem *)(map)->handle) + (offset)) | |
| 33 | /** Write a word into a MMIO region */ | |
| 34 | #define DRM_WRITE16(map, offset, val) writew(val, ((void __iomem *)(map)->handle) + (offset)) | |
| 35 | /** Write a dword into a MMIO region */ | |
| 36 | #define DRM_WRITE32(map, offset, val) writel(val, ((void __iomem *)(map)->handle) + (offset)) | |
| 87f0da55 DA |
37 | |
| 38 | /** Read a qword from a MMIO region - be careful using these unless you really understand them */ | |
| 39 | #define DRM_READ64(map, offset) readq(((void __iomem *)(map)->handle) + (offset)) | |
| 40 | /** Write a qword into a MMIO region */ | |
| 41 | #define DRM_WRITE64(map, offset, val) writeq(val, ((void __iomem *)(map)->handle) + (offset)) | |
| 42 | ||
| 1da177e4 LT |
43 | #define DRM_WAIT_ON( ret, queue, timeout, condition ) \ |
| 44 | do { \ | |
| 45 | DECLARE_WAITQUEUE(entry, current); \ | |
| 46 | unsigned long end = jiffies + (timeout); \ | |
| 47 | add_wait_queue(&(queue), &entry); \ | |
| 48 | \ | |
| 49 | for (;;) { \ | |
| 50 | __set_current_state(TASK_INTERRUPTIBLE); \ | |
| 51 | if (condition) \ | |
| 52 | break; \ | |
| 53 | if (time_after_eq(jiffies, end)) { \ | |
| 54 | ret = -EBUSY; \ | |
| 55 | break; \ | |
| 56 | } \ | |
| 57 | schedule_timeout((HZ/100 > 1) ? HZ/100 : 1); \ | |
| 58 | if (signal_pending(current)) { \ | |
| 59 | ret = -EINTR; \ | |
| 60 | break; \ | |
| 61 | } \ | |
| 62 | } \ | |
| 63 | __set_current_state(TASK_RUNNING); \ | |
| 64 | remove_wait_queue(&(queue), &entry); \ | |
| 65 | } while (0) |