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65 lines
2.2 KiB
65 lines
2.2 KiB
/** |
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* \file drm_os_linux.h |
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* OS abstraction macros. |
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*/ |
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#include <linux/interrupt.h> /* For task queue support */ |
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#include <linux/delay.h> |
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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)
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