slb.h (3455B) - Raw
1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (C) 2009 Nathan Whitehorn 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 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 * SLB page sizes encoding, as present in property ibm,segment-page-sizes 67 * of CPU device tree node. 68 * 69 * See LoPAPR: CPU Node Properties, section C.6.1.4. 70 */ 71 #define SLB_PGSZ_4K_4K 0 72 73 /* Virtual real-mode VSID in LPARs */ 74 #define VSID_VRMA 0x1ffffff 75 76 /* 77 * User segment for copyin/out 78 */ 79 #define USER_SLB_SLOT 0 80 #define USER_SLB_SLBE (((USER_ADDR >> ADDR_SR_SHFT) << SLBE_ESID_SHIFT) | \ 81 SLBE_VALID | USER_SLB_SLOT) 82 83 struct slb { 84 uint64_t slbv; 85 uint64_t slbe; 86 }; 87 88 struct pmap; 89 void handle_kernel_slb_spill(int, register_t, register_t); 90 int handle_user_slb_spill(struct pmap *pm, vm_offset_t addr); 91 92 #endif /* !_MACHINE_SLB_H_ */