1 /*- 2 * Copyright (C) 2009 Nathan Whitehorn 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 18 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 20 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 21 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 22 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 23 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 * 25 * $FreeBSD$ 26 */ 27 28 #ifndef _MACHINE_SLB_H_ 29 #define _MACHINE_SLB_H_ 30 31 /* 32 * Bit definitions for segment lookaside buffer entries. 33 * 34 * PowerPC Microprocessor Family: The Programming Environments for 64-bit 35 * Microprocessors, section 7.4.2.1 36 * 37 * Note that these bitmasks are relative to the values for one of the two 38 * values for slbmte, slbmfee, and slbmfev, not the internal SLB 39 * representation. 40 */ 41 42 #define SLBV_KS 0x0000000000000800UL /* Supervisor-state prot key */ 43 #define SLBV_KP 0x0000000000000400UL /* User-state prot key */ 44 #define SLBV_N 0x0000000000000200UL /* No-execute protection */ 45 #define SLBV_L 0x0000000000000100UL /* Large page selector */ 46 #define SLBV_CLASS 0x0000000000000080UL /* Class selector */ 47 #define SLBV_VSID_MASK 0xfffffffffffff000UL /* Virtual segment ID mask */ 48 #define SLBV_VSID_SHIFT 12 49 50 /* 51 * Make a predictable 1:1 map from ESIDs to VSIDs for the kernel. Hash table 52 * coverage is increased by swizzling the ESID and multiplying by a prime 53 * number (0x13bb). 54 */ 55 #define KERNEL_VSID_BIT 0x0000001000000000UL /* Bit set in all kernel VSIDs */ 56 #define KERNEL_VSID(esid) ((((((uint64_t)esid << 8) | ((uint64_t)esid >> 28)) \ 57 * 0x13bbUL) & (KERNEL_VSID_BIT - 1)) | \ 58 KERNEL_VSID_BIT) 59 60 #define SLBE_VALID 0x0000000008000000UL /* SLB entry valid */ 61 #define SLBE_INDEX_MASK 0x0000000000000fffUL /* SLB index mask*/ 62 #define SLBE_ESID_MASK 0xfffffffff0000000UL /* Effective segment ID mask */ 63 #define SLBE_ESID_SHIFT 28 64 65 /* 66 * User segment for copyin/out 67 */ 68 #define USER_SLB_SLOT 63 69 #define USER_SLB_SLBE (((USER_ADDR >> ADDR_SR_SHFT) << SLBE_ESID_SHIFT) | \ 70 SLBE_VALID | USER_SLB_SLOT) 71 72 struct slb { 73 uint64_t slbv; 74 uint64_t slbe; 75 }; 76 77 #endif /* !_MACHINE_SLB_H_ */ 78