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 */ 39
