/arch/powerpc/include/asm/tce.h

 1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2/*
 3 * Copyright (C) 2001 Mike Corrigan & Dave Engebretsen, IBM Corporation
 4 * Rewrite, cleanup:
 5 * Copyright (C) 2004 Olof Johansson <olof@lixom.net>, IBM Corporation
 6 */
 7
 8#ifndef _ASM_POWERPC_TCE_H
 9#define _ASM_POWERPC_TCE_H
10#ifdef __KERNEL__
11
12#include <asm/iommu.h>
13
14/*
15 * Tces come in two formats, one for the virtual bus and a different
16 * format for PCI.  PCI TCEs can have hardware or software maintianed
17 * coherency.
18 */
19#define TCE_VB			0
20#define TCE_PCI			1
21
22/* TCE page size is 4096 bytes (1 << 12) */
23
24#define TCE_SHIFT	12
25#define TCE_PAGE_SIZE	(1 << TCE_SHIFT)
26
27#define TCE_ENTRY_SIZE		8		/* each TCE is 64 bits */
28
29#define TCE_RPN_MASK		0xfffffffffful  /* 40-bit RPN (4K pages) */
30#define TCE_RPN_SHIFT		12
31#define TCE_VALID		0x800		/* TCE valid */
32#define TCE_ALLIO		0x400		/* TCE valid for all lpars */
33#define TCE_PCI_WRITE		0x2		/* write from PCI allowed */
34#define TCE_PCI_READ		0x1		/* read from PCI allowed */
35#define TCE_VB_WRITE		0x1		/* write from VB allowed */
36
37#endif /* __KERNEL__ */
38#endif /* _ASM_POWERPC_TCE_H */