1/*- 2 * Copyright (c) 2014 Robin Randhawa 3 * Copyright (c) 2015 The FreeBSD Foundation 4 * All rights reserved. 5 * 6 * Portions of this software were developed by Andrew Turner 7 * under sponsorship from the FreeBSD Foundation 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 */ 31 32#include <sys/errno.h> 33#include <machine/asm.h> 34#include <machine/param.h> 35 36#include "assym.inc" 37/* 38 * FIXME: 39 * Need big.LITTLE awareness at some point. 40 * Using arm64_p[id]cache_line_size may not be the best option. 41 * Need better SMP awareness. 42 */ 43 .text 44 .align 2 45 46.Lpage_mask: 47 .word PAGE_MASK 48 49/* 50 * Macro to handle the cache. This takes the start address in x0, length 51 * in x1. It will corrupt x0, x1, x2, x3, and x4. 52 */ 53.macro cache_handle_range dcop = 0, ic = 0, icop = 0 54.if \ic == 0 55 adrp x3, dcache_line_size /* Load the D cache line size */ 56 ldr x3, [x3, :lo12:dcache_line_size] 57.else 58 adrp x3, idcache_line_size /* Load the I & D cache line size */ 59 ldr x3, [x3, :lo12:idcache_line_size] 60.endif 61 sub x4, x3, #1 /* Get the address mask */ 62 and x2, x0, x4 /* Get the low bits of the address */ 63 add x1, x1, x2 /* Add these to the size */ 64 bic x0, x0, x4 /* Clear the low bit of the address */ 65.if \ic != 0 66 mov x2, x0 /* Save the address */ 67 mov x4, x1 /* Save the size */ 68.endif 691: 70 dc \dcop, x0 71 add x0, x0, x3 /* Move to the next line */ 72 subs x1, x1, x3 /* Reduce the size */ 73 b.hi 1b /* Check if we are done */ 74 dsb ish 75.if \ic != 0 762: 77 ic \icop, x2 78 add x2, x2, x3 /* Move to the next line */ 79 subs x4, x4, x3 /* Reduce the size */ 80 b.hi 2b /* Check if we are done */ 81 dsb ish 82 isb 83.endif 84.endm 85 86ENTRY(arm64_nullop) 87 ret 88END(arm64_nullop) 89 90/* 91 * Generic functions to read/modify/write the internal coprocessor registers 92 */ 93 94ENTRY(arm64_tlb_flushID) 95 dsb ishst 96#ifdef SMP 97 tlbi vmalle1is 98#else 99 tlbi vmalle1 100#endif 101 dsb ish 102 isb 103 ret 104END(arm64_tlb_flushID) 105 106/* 107 * void arm64_dcache_wb_range(void *, vm_size_t) 108 */ 109ENTRY(arm64_dcache_wb_range) 110 cache_handle_range dcop = cvac 111 ret 112END(arm64_dcache_wb_range) 113 114/* 115 * void arm64_dcache_wbinv_range(void *, vm_size_t) 116 */ 117ENTRY(arm64_dcache_wbinv_range) 118 cache_handle_range dcop = civac 119 ret 120END(arm64_dcache_wbinv_range) 121 122/* 123 * void arm64_dcache_inv_range(void *, vm_size_t) 124 * 125 * Note, we must not invalidate everything. If the range is too big we 126 * must use wb-inv of the entire cache. 127 */ 128ENTRY(arm64_dcache_inv_range) 129 cache_handle_range dcop = ivac 130 ret 131END(arm64_dcache_inv_range) 132 133/* 134 * void arm64_dic_idc_icache_sync_range(void *, vm_size_t) 135 * When the CTR_EL0.IDC bit is set cleaning to PoU becomes a dsb. 136 * When the CTR_EL0.DIC bit is set icache invalidation becomes an isb. 137 */ 138ENTRY(arm64_dic_idc_icache_sync_range) 139 dsb ishst 140 isb 141 ret 142END(arm64_dic_idc_icache_sync_range) 143 144/* 145 * void arm64_idc_aliasing_icache_sync_range(void *, vm_size_t) 146 * When the CTR_EL0.IDC bit is set cleaning to PoU becomes a dsb. 147 */ 148ENTRY(arm64_idc_aliasing_icache_sync_range) 149 dsb ishst 150 ic ialluis 151 dsb ish 152 isb 153 ret 154END(arm64_idc_aliasing_icache_sync_range) 155 156/* 157 * void arm64_aliasing_icache_sync_range(void *, vm_size_t) 158 */ 159ENTRY(arm64_aliasing_icache_sync_range) 160 /* 161 * XXX Temporary solution - I-cache flush should be range based for 162 * PIPT cache or IALLUIS for VIVT or VIPT caches 163 */ 164/* cache_handle_range dcop = cvau, ic = 1, icop = ivau */ 165 cache_handle_range dcop = cvau 166 ic ialluis 167 dsb ish 168 isb 169 ret 170END(arm64_aliasing_icache_sync_range) 171 172/* 173 * int arm64_icache_sync_range_checked(void *, vm_size_t) 174 */ 175ENTRY(arm64_icache_sync_range_checked) 176 adr x5, cache_maint_fault 177 SET_FAULT_HANDLER(x5, x6) 178 /* XXX: See comment in arm64_icache_sync_range */ 179 cache_handle_range dcop = cvau 180 ic ialluis 181 dsb ish 182 isb 183 SET_FAULT_HANDLER(xzr, x6) 184 mov x0, #0 185 ret 186END(arm64_icache_sync_range_checked) 187 188ENTRY(cache_maint_fault) 189 SET_FAULT_HANDLER(xzr, x1) 190 mov x0, #EFAULT 191 ret 192END(cache_maint_fault) 193