2 * Copyright (c) 2014 Robin Randhawa
3 * Copyright (c) 2015 The FreeBSD Foundation
6 * Portions of this software were developed by Andrew Turner
7 * under sponsorship from the FreeBSD Foundation
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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.
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
32 #include <sys/errno.h>
33 #include <machine/asm.h>
34 #include <machine/param.h>
38 __FBSDID("$FreeBSD$");
42 * Need big.LITTLE awareness at some point.
43 * Using arm64_p[id]cache_line_size may not be the best option.
44 * Need better SMP awareness.
53 * Macro to handle the cache. This takes the start address in x0, length
54 * in x1. It will corrupt x0, x1, x2, x3, and x4.
56 .macro cache_handle_range dcop = 0, ic = 0, icop = 0
58 ldr x3, =dcache_line_size /* Load the D cache line size */
60 ldr x3, =idcache_line_size /* Load the I & D cache line size */
63 sub x4, x3, #1 /* Get the address mask */
64 and x2, x0, x4 /* Get the low bits of the address */
65 add x1, x1, x2 /* Add these to the size */
66 bic x0, x0, x4 /* Clear the low bit of the address */
68 mov x2, x0 /* Save the address */
69 mov x4, x1 /* Save the size */
73 add x0, x0, x3 /* Move to the next line */
74 subs x1, x1, x3 /* Reduce the size */
75 b.hi 1b /* Check if we are done */
80 add x2, x2, x3 /* Move to the next line */
81 subs x4, x4, x3 /* Reduce the size */
82 b.hi 2b /* Check if we are done */
93 * Generic functions to read/modify/write the internal coprocessor registers
96 ENTRY(arm64_tlb_flushID)
106 END(arm64_tlb_flushID)
109 * void arm64_dcache_wb_range(vm_offset_t, vm_size_t)
111 ENTRY(arm64_dcache_wb_range)
112 cache_handle_range dcop = cvac
114 END(arm64_dcache_wb_range)
117 * void arm64_dcache_wbinv_range(vm_offset_t, vm_size_t)
119 ENTRY(arm64_dcache_wbinv_range)
120 cache_handle_range dcop = civac
122 END(arm64_dcache_wbinv_range)
125 * void arm64_dcache_inv_range(vm_offset_t, vm_size_t)
127 * Note, we must not invalidate everything. If the range is too big we
128 * must use wb-inv of the entire cache.
130 ENTRY(arm64_dcache_inv_range)
131 cache_handle_range dcop = ivac
133 END(arm64_dcache_inv_range)
136 * void arm64_dic_idc_icache_sync_range(vm_offset_t, vm_size_t)
137 * When the CTR_EL0.IDC bit is set cleaning to PoU becomes a dsb.
138 * When the CTR_EL0.DIC bit is set icache invalidation becomes an isb.
140 ENTRY(arm64_dic_idc_icache_sync_range)
144 END(arm64_dic_idc_icache_sync_range)
147 * void arm64_aliasing_icache_sync_range(vm_offset_t, vm_size_t)
149 ENTRY(arm64_aliasing_icache_sync_range)
151 * XXX Temporary solution - I-cache flush should be range based for
152 * PIPT cache or IALLUIS for VIVT or VIPT caches
154 /* cache_handle_range dcop = cvau, ic = 1, icop = ivau */
155 cache_handle_range dcop = cvau
160 END(arm64_aliasing_icache_sync_range)
163 * int arm64_icache_sync_range_checked(vm_offset_t, vm_size_t)
165 ENTRY(arm64_icache_sync_range_checked)
166 adr x5, cache_maint_fault
167 SET_FAULT_HANDLER(x5, x6)
168 /* XXX: See comment in arm64_icache_sync_range */
169 cache_handle_range dcop = cvau
173 SET_FAULT_HANDLER(xzr, x6)
176 END(arm64_icache_sync_range_checked)
178 ENTRY(cache_maint_fault)
179 SET_FAULT_HANDLER(xzr, x1)
182 END(cache_maint_fault)