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generated by cgit v1.2.3 (git 2.25.1) at 2025-01-13 19:27:01 +0000
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/**
 * \file drm_os_linux.h
 * OS abstraction macros.
 */

#include <linux/interrupt.h>	/* For task queue support */
#include <linux/delay.h>

/** File pointer type */
#define DRMFILE                         struct file *
/** Ioctl arguments */
#define DRM_IOCTL_ARGS			struct inode *inode, struct file *filp, unsigned int cmd, unsigned long data
#define DRM_ERR(d)			-(d)
/** Current process ID */
#define DRM_CURRENTPID			current->pid
#define DRM_SUSER(p)			capable(CAP_SYS_ADMIN)
#define DRM_UDELAY(d)			udelay(d)
#if LINUX_VERSION_CODE <= 0x020608	/* KERNEL_VERSION(2,6,8) */
#ifndef __iomem
#define __iomem
#endif
/** 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))
#else
/** Read a byte from a MMIO region */
#define DRM_READ8(map, offset)		readb((map)->handle + (offset))
/** Read a word from a MMIO region */
#define DRM_READ16(map, offset)		readw((map)->handle + (offset))
/** Read a dword from a MMIO region */
#define DRM_READ32(map, offset)		readl((map)->handle + (offset))
/** Write a byte into a MMIO region */
#define DRM_WRITE8(map, offset, val)	writeb(val, (map)->handle + (offset))
/** Write a word into a MMIO region */
#define DRM_WRITE16(map, offset, val)	writew(val, (map)->handle + (offset))
/** Write a dword into a MMIO region */
#define DRM_WRITE32(map, offset, val)	writel(val, (map)->handle + (offset))
#endif
/** Read memory barrier */
#define DRM_READMEMORYBARRIER()		rmb()
/** Write memory barrier */
#define DRM_WRITEMEMORYBARRIER()	wmb()
/** Read/write memory barrier */
#define DRM_MEMORYBARRIER()		mb()
/** DRM device local declaration */
#define DRM_DEVICE	drm_file_t	*priv	= filp->private_data; \
			drm_device_t	*dev	= priv->head->dev

/** IRQ handler arguments and return type and values */
#define DRM_IRQ_ARGS		int irq, void *arg
/** backwards compatibility with old irq return values */
#ifndef IRQ_HANDLED
typedef void irqreturn_t;
#define IRQ_HANDLED		/* nothing */
#define IRQ_NONE		/* nothing */
#endif

/** AGP types */
#if __OS_HAS_AGP
#define DRM_AGP_MEM		struct agp_memory
#define DRM_AGP_KERN		struct agp_kern_info
#else
/* define some dummy types for non AGP supporting kernels */
struct no_agp_kern {
	unsigned long aper_base;
	unsigned long aper_size;
};
#define DRM_AGP_MEM		int
#define DRM_AGP_KERN		struct no_agp_kern
#endif

#if !(__OS_HAS_MTRR)
static __inline__ int mtrr_add(unsigned long base, unsigned long size,
			       unsigned int type, char increment)
{
	return -ENODEV;
}

static __inline__ int mtrr_del(int reg, unsigned long base, unsigned long size)
{
	return -ENODEV;
}

#define MTRR_TYPE_WRCOMB     1
#endif