Commit 97ec7d58 authored by Hiroshi DOYU's avatar Hiroshi DOYU Committed by Tony Lindgren
Browse files

omap iommu: cleanup iommu page address mask and definitions 



This is just a cleanup, but adds a few macros here, which can be used
in the proceeding patches.

Signed-off-by: default avatarHiroshi DOYU <Hiroshi.DOYU@nokia.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent cc87edb1

arch/arm/plat-omap/iopgtable.h

+39 −11
Original line number Diff line number Diff line 
/*

 * omap iommu: pagetable definitions

 *

 * Copyright (C) 2008-2009 Nokia Corporation

 * Copyright (C) 2008-2010 Nokia Corporation

 *

 * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>

 *
@@ -13,26 +13,52 @@ 
#ifndef __PLAT_OMAP_IOMMU_H

#define __PLAT_OMAP_IOMMU_H



/*

 * "L2 table" address mask and size definitions.

 */

#define IOPGD_SHIFT		20

#define IOPGD_SIZE		(1 << IOPGD_SHIFT)

#define IOPGD_SIZE		(1UL << IOPGD_SHIFT)

#define IOPGD_MASK		(~(IOPGD_SIZE - 1))

#define IOSECTION_MASK		IOPGD_MASK

#define PTRS_PER_IOPGD		(1 << (32 - IOPGD_SHIFT))

#define IOPGD_TABLE_SIZE	(PTRS_PER_IOPGD * sizeof(u32))



#define IOSUPER_SIZE		(IOPGD_SIZE << 4)

/*

 * "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		(1 << IOPTE_SHIFT)

#define IOPTE_SIZE		(1UL << IOPTE_SHIFT)

#define IOPTE_MASK		(~(IOPTE_SIZE - 1))

#define IOPAGE_MASK		IOPTE_MASK

#define PTRS_PER_IOPTE		(1 << (IOPGD_SHIFT - IOPTE_SHIFT))

#define IOPTE_TABLE_SIZE	(PTRS_PER_IOPTE * sizeof(u32))



#define IOLARGE_SIZE		(IOPTE_SIZE << 4)

/*

 * "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



/*

 * some descriptor attributes.

 */

#define IOPGD_TABLE		(1 << 0)

#define IOPGD_SECTION		(2 << 0)

#define IOPGD_SUPER		(1 << 18 | 2 << 0)
@@ -40,12 +66,14 @@ 
#define IOPTE_SMALL		(2 << 0)

#define IOPTE_LARGE		(1 << 0)



/* 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 iopte_paddr(iopgd)	(*iopgd & ~((1 << 10) - 1))

#define iopte_vaddr(iopgd)	((u32 *)phys_to_virt(iopte_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)	(iopte_vaddr(iopgd) + iopte_index(da))