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 <machine/asm.h> 33#include <machine/param.h> 34__FBSDID("$FreeBSD$"); 35 36/* 37 * FIXME: 38 * Need big.LITTLE awareness at some point. 39 * Using arm64_p[id]cache_line_size may not be the best option. 40 * Need better SMP awareness. 41 */ 42 .text 43 .align 2 44 45.Lpage_mask: 46 .word PAGE_MASK 47 48/* 49 * Macro to handle the cache. This takes the start address in x0, length 50 * in x1. It will corrupt x0, x1, x2, and x3. 51 */ 52.macro cache_handle_range dcop = 0, ic = 0, icop = 0 53.if \ic == 0 54 ldr x3, =dcache_line_size /* Load the D cache line size */ 55.else 56 ldr x3, =idcache_line_size /* Load the I & D cache line size */ 57.endif 58 ldr x3, [x3] 59 sub x4, x3, #1 /* Get the address mask */ 60 and x2, x0, x4 /* Get the low bits of the address */ 61 add x1, x1, x2 /* Add these to the size */ 62 bic x0, x0, x4 /* Clear the low bit of the address */ 631: 64.if \ic != 0 65 ic \icop, x0 66.endif 67 dc \dcop, x0 68 add x0, x0, x3 /* Move to the next line */ 69 subs x1, x1, x3 /* Reduce the size */ 70 b.hi 1b /* Check if we are done */ 71.if \ic != 0 72 isb 73.endif 74 dsb ish 75 ret 76.endm 77 78ENTRY(arm64_nullop) 79 ret 80END(arm64_nullop) 81 82/* 83 * Generic functions to read/modify/write the internal coprocessor registers 84 */ 85 86ENTRY(arm64_setttb) 87 dsb ish 88 msr ttbr0_el1, x0 89 dsb ish 90 isb 91 ret 92END(arm64_setttb) 93 94ENTRY(arm64_tlb_flushID) 95#ifdef SMP 96 tlbi vmalle1is 97#else 98 tlbi vmalle1 99#endif 100 dsb ish 101 isb 102 ret 103END(arm64_tlb_flushID) 104 105ENTRY(arm64_tlb_flushID_SE) 106 ldr x1, .Lpage_mask 107 bic x0, x0, x1 108#ifdef SMP 109 tlbi vae1is, x0 110#else 111 tlbi vae1, x0 112#endif 113 dsb ish 114 isb 115 ret 116END(arm64_tlb_flushID_SE) 117 118/* 119 * void arm64_dcache_wb_range(vm_offset_t, vm_size_t) 120 */ 121ENTRY(arm64_dcache_wb_range) 122 cache_handle_range dcop = cvac 123END(arm64_dcache_wb_range) 124 125/* 126 * void arm64_dcache_wbinv_range(vm_offset_t, vm_size_t) 127 */ 128ENTRY(arm64_dcache_wbinv_range) 129 cache_handle_range dcop = civac 130END(arm64_dcache_wbinv_range) 131 132/* 133 * void arm64_dcache_inv_range(vm_offset_t, vm_size_t) 134 * 135 * Note, we must not invalidate everything. If the range is too big we 136 * must use wb-inv of the entire cache. 137 */ 138ENTRY(arm64_dcache_inv_range) 139 cache_handle_range dcop = ivac 140END(arm64_dcache_inv_range) 141 142/* 143 * void arm64_idcache_wbinv_range(vm_offset_t, vm_size_t) 144 */ 145ENTRY(arm64_idcache_wbinv_range) 146 cache_handle_range dcop = civac, ic = 1, icop = ivau 147END(arm64_idcache_wbinv_range) 148 149/* 150 * void arm64_icache_sync_range(vm_offset_t, vm_size_t) 151 */ 152ENTRY(arm64_icache_sync_range) 153 cache_handle_range dcop = cvac, ic = 1, icop = ivau 154END(arm64_icache_sync_range) 155