[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / iommu / omap-iopgtable.h

/*
 * omap iommu: pagetable definitions
 *
 * Copyright (C) 2008-2010 Nokia Corporation
 *
 * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

/*
 * "L2 table" address mask and size definitions.
 */
#define IOPGD_SHIFT		20
#define IOPGD_SIZE		(1UL << IOPGD_SHIFT)
#define IOPGD_MASK		(~(IOPGD_SIZE - 1))

/*
 * "section" address mask and size definitions.
 */
#define IOSECTION_SHIFT		20
#define IOSECTION_SIZE		(1UL << IOSECTION_SHIFT)
#define IOSECTION_MASK		(~(IOSECTION_SIZE - 1))

/*
 * "supersection" address mask and size definitions.
 */
#define IOSUPER_SHIFT		24
#define IOSUPER_SIZE		(1UL << IOSUPER_SHIFT)
#define IOSUPER_MASK		(~(IOSUPER_SIZE - 1))

#define PTRS_PER_IOPGD		(1UL << (32 - IOPGD_SHIFT))
#define IOPGD_TABLE_SIZE	(PTRS_PER_IOPGD * sizeof(u32))

/*
 * "small page" address mask and size definitions.
 */
#define IOPTE_SHIFT		12
#define IOPTE_SIZE		(1UL << IOPTE_SHIFT)
#define IOPTE_MASK		(~(IOPTE_SIZE - 1))

/*
 * "large page" address mask and size definitions.
 */
#define IOLARGE_SHIFT		16
#define IOLARGE_SIZE		(1UL << IOLARGE_SHIFT)
#define IOLARGE_MASK		(~(IOLARGE_SIZE - 1))

#define PTRS_PER_IOPTE		(1UL << (IOPGD_SHIFT - IOPTE_SHIFT))
#define IOPTE_TABLE_SIZE	(PTRS_PER_IOPTE * sizeof(u32))

#define IOPAGE_MASK		IOPTE_MASK

/**
 * omap_iommu_translate() - va to pa translation
 * @d:		omap iommu descriptor
 * @va:		virtual address
 * @mask:	omap iommu descriptor mask
 *
 * va to pa translation
 */
static inline phys_addr_t omap_iommu_translate(u32 d, u32 va, u32 mask)
{
	return (d & mask) | (va & (~mask));
}

/*
 * some descriptor attributes.
 */
#define IOPGD_TABLE		(1 << 0)
#define IOPGD_SECTION		(2 << 0)
#define IOPGD_SUPER		(1 << 18 | 2 << 0)

#define iopgd_is_table(x)	(((x) & 3) == IOPGD_TABLE)
#define iopgd_is_section(x)	(((x) & (1 << 18 | 3)) == IOPGD_SECTION)
#define iopgd_is_super(x)	(((x) & (1 << 18 | 3)) == IOPGD_SUPER)

#define IOPTE_SMALL		(2 << 0)
#define IOPTE_LARGE		(1 << 0)

#define iopte_is_small(x)	(((x) & 2) == IOPTE_SMALL)
#define iopte_is_large(x)	(((x) & 3) == IOPTE_LARGE)

/* to find an entry in a page-table-directory */
#define iopgd_index(da)		(((da) >> IOPGD_SHIFT) & (PTRS_PER_IOPGD - 1))
#define iopgd_offset(obj, da)	((obj)->iopgd + iopgd_index(da))

#define iopgd_page_paddr(iopgd)	(*iopgd & ~((1 << 10) - 1))
#define iopgd_page_vaddr(iopgd)	((u32 *)phys_to_virt(iopgd_page_paddr(iopgd)))

/* to find an entry in the second-level page table. */
#define iopte_index(da)		(((da) >> IOPTE_SHIFT) & (PTRS_PER_IOPTE - 1))
#define iopte_offset(iopgd, da)	(iopgd_page_vaddr(iopgd) + iopte_index(da))

#define to_iommu(dev)							\
	(struct omap_iommu *)platform_get_drvdata(to_platform_device(dev))
Commit	Line	Data
a9dcad5e HD	1	/*
	2	* omap iommu: pagetable definitions
	3	*
97ec7d58	4	* Copyright (C) 2008-2010 Nokia Corporation
a9dcad5e HD	5	*
	6	* Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12
97ec7d58 HD	13	/*
	14	* "L2 table" address mask and size definitions.
	15	*/
a9dcad5e	16	#define IOPGD_SHIFT 20
97ec7d58	17	#define IOPGD_SIZE (1UL << IOPGD_SHIFT)
a9dcad5e	18	#define IOPGD_MASK (~(IOPGD_SIZE - 1))
a9dcad5e	19
97ec7d58 HD	20	/*
	21	* "section" address mask and size definitions.
	22	*/
	23	#define IOSECTION_SHIFT 20
	24	#define IOSECTION_SIZE (1UL << IOSECTION_SHIFT)
	25	#define IOSECTION_MASK (~(IOSECTION_SIZE - 1))
	26
	27	/*
	28	* "supersection" address mask and size definitions.
	29	*/
	30	#define IOSUPER_SHIFT 24
	31	#define IOSUPER_SIZE (1UL << IOSUPER_SHIFT)
a9dcad5e HD	32	#define IOSUPER_MASK (~(IOSUPER_SIZE - 1))
a9dcad5e HD	33
97ec7d58 HD	34	#define PTRS_PER_IOPGD (1UL << (32 - IOPGD_SHIFT))
	35	#define IOPGD_TABLE_SIZE (PTRS_PER_IOPGD * sizeof(u32))
	36
	37	/*
	38	* "small page" address mask and size definitions.
	39	*/
a9dcad5e	40	#define IOPTE_SHIFT 12
97ec7d58	41	#define IOPTE_SIZE (1UL << IOPTE_SHIFT)
a9dcad5e	42	#define IOPTE_MASK (~(IOPTE_SIZE - 1))
a9dcad5e	43
97ec7d58 HD	44	/*
	45	* "large page" address mask and size definitions.
	46	*/
	47	#define IOLARGE_SHIFT 16
	48	#define IOLARGE_SIZE (1UL << IOLARGE_SHIFT)
a9dcad5e HD	49	#define IOLARGE_MASK (~(IOLARGE_SIZE - 1))
a9dcad5e HD	50
97ec7d58 HD	51	#define PTRS_PER_IOPTE (1UL << (IOPGD_SHIFT - IOPTE_SHIFT))
	52	#define IOPTE_TABLE_SIZE (PTRS_PER_IOPTE * sizeof(u32))
	53
	54	#define IOPAGE_MASK IOPTE_MASK
	55
f626b52d OBC	56	/**
	57	* omap_iommu_translate() - va to pa translation
	58	* @d: omap iommu descriptor
	59	* @va: virtual address
	60	* @mask: omap iommu descriptor mask
	61	*
	62	* va to pa translation
	63	*/
	64	static inline phys_addr_t omap_iommu_translate(u32 d, u32 va, u32 mask)
	65	{
	66	return (d & mask) \| (va & (~mask));
	67	}
	68
97ec7d58 HD	69	/*
	70	* some descriptor attributes.
	71	*/
a9dcad5e HD	72	#define IOPGD_TABLE (1 << 0)
	73	#define IOPGD_SECTION (2 << 0)
	74	#define IOPGD_SUPER (1 << 18 \| 2 << 0)
	75
a1a54456	76	#define iopgd_is_table(x) (((x) & 3) == IOPGD_TABLE)
f626b52d OBC	77	#define iopgd_is_section(x) (((x) & (1 << 18 \| 3)) == IOPGD_SECTION)
f626b52d OBC	78	#define iopgd_is_super(x) (((x) & (1 << 18 \| 3)) == IOPGD_SUPER)
a1a54456	79
a9dcad5e HD	80	#define IOPTE_SMALL (2 << 0)
	81	#define IOPTE_LARGE (1 << 0)
	82
f626b52d OBC	83	#define iopte_is_small(x) (((x) & 2) == IOPTE_SMALL)
	84	#define iopte_is_large(x) (((x) & 3) == IOPTE_LARGE)
	85
97ec7d58	86	/* to find an entry in a page-table-directory */
a9dcad5e HD	87	#define iopgd_index(da) (((da) >> IOPGD_SHIFT) & (PTRS_PER_IOPGD - 1))
	88	#define iopgd_offset(obj, da) ((obj)->iopgd + iopgd_index(da))
	89
12493359 HD	90	#define iopgd_page_paddr(iopgd) (*iopgd & ~((1 << 10) - 1))
12493359 HD	91	#define iopgd_page_vaddr(iopgd) ((u32 *)phys_to_virt(iopgd_page_paddr(iopgd)))
a9dcad5e	92
97ec7d58	93	/* to find an entry in the second-level page table. */
a9dcad5e	94	#define iopte_index(da) (((da) >> IOPTE_SHIFT) & (PTRS_PER_IOPTE - 1))
12493359	95	#define iopte_offset(iopgd, da) (iopgd_page_vaddr(iopgd) + iopte_index(da))
a9dcad5e	96
a9dcad5e	97	#define to_iommu(dev) \
6c32df43	98	(struct omap_iommu *)platform_get_drvdata(to_platform_device(dev))