2 * Copyright (c) 1990 The Regents of the University of California.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * from: @(#)sys_machdep.c 5.5 (Berkeley) 1/19/91
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #include "opt_capsicum.h"
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/capsicum.h>
41 #include <sys/sysproto.h>
42 #include <sys/syscall.h>
43 #include <sys/sysent.h>
45 #include <vm/vm_extern.h>
47 #include <machine/cpu.h>
48 #include <machine/sysarch.h>
49 #include <machine/vmparam.h>
51 #ifndef _SYS_SYSPROTO_H_
59 static int arm32_sync_icache (struct thread *, void *);
60 static int arm32_drain_writebuf(struct thread *, void *);
64 sync_icache(uintptr_t addr, size_t len)
70 * Align starting address to even number because value of "1"
71 * is used as return value for success.
76 /* Break whole range to pages. */
78 size = PAGE_SIZE - (addr & PAGE_MASK);
79 size = min(size, len);
80 rv = dcache_wb_pou_checked(addr, size);
81 if (rv == 1) /* see dcache_wb_pou_checked() */
82 rv = icache_inv_pou_checked(addr, size);
84 if (!useracc((void *)addr, size, VM_PROT_READ)) {
88 /* Valid but unmapped page - skip it. */
94 /* Invalidate branch predictor buffer. */
101 arm32_sync_icache(struct thread *td, void *args)
103 struct arm_sync_icache_args ua;
110 if ((error = copyin(args, &ua, sizeof(ua))) != 0)
114 td->td_retval[0] = 0;
119 * Validate arguments. Address and length are unsigned,
120 * so we can use wrapped overflow check.
122 if (((ua.addr + ua.len) < ua.addr) ||
123 ((ua.addr + ua.len) > VM_MAXUSER_ADDRESS)) {
124 ksiginfo_init_trap(&ksi);
125 ksi.ksi_signo = SIGSEGV;
126 ksi.ksi_code = SEGV_ACCERR;
127 ksi.ksi_addr = (void *)max(ua.addr, VM_MAXUSER_ADDRESS);
128 trapsignal(td, &ksi);
133 rv = sync_icache(ua.addr, ua.len);
135 ksiginfo_init_trap(&ksi);
136 ksi.ksi_signo = SIGSEGV;
137 ksi.ksi_code = SEGV_MAPERR;
138 ksi.ksi_addr = (void *)rv;
139 trapsignal(td, &ksi);
143 cpu_icache_sync_range(ua.addr, ua.len);
146 td->td_retval[0] = 0;
151 arm32_drain_writebuf(struct thread *td, void *args)
156 cpu_drain_writebuf();
159 cpu_l2cache_drain_writebuf();
161 td->td_retval[0] = 0;
166 arm32_set_tp(struct thread *td, void *args)
169 td->td_md.md_tp = (register_t)args;
173 *(register_t *)ARM_TP_ADDRESS = (register_t)args;
179 arm32_get_tp(struct thread *td, void *args)
183 td->td_retval[0] = td->td_md.md_tp;
185 td->td_retval[0] = *(register_t *)ARM_TP_ADDRESS;
193 register struct sysarch_args *uap;
197 #ifdef CAPABILITY_MODE
199 * When adding new operations, add a new case statement here to
200 * explicitly indicate whether or not the operation is safe to
201 * perform in capability mode.
203 if (IN_CAPABILITY_MODE(td)) {
205 case ARM_SYNC_ICACHE:
206 case ARM_DRAIN_WRITEBUF:
213 if (KTRPOINT(td, KTR_CAPFAIL))
214 ktrcapfail(CAPFAIL_SYSCALL, NULL, NULL);
222 case ARM_SYNC_ICACHE:
223 error = arm32_sync_icache(td, uap->parms);
225 case ARM_DRAIN_WRITEBUF:
226 error = arm32_drain_writebuf(td, uap->parms);
229 error = arm32_set_tp(td, uap->parms);
232 error = arm32_get_tp(td, uap->parms);