1 /* $NetBSD: sys_machdep.c,v 1.11 2010/07/07 01:20:49 chs Exp $ */ 2 3 /* 4 * Copyright (c) 1995-1997 Mark Brinicombe. 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 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Mark Brinicombe 18 * 4. The name of the company nor the name of the author may be used to 19 * endorse or promote products derived from this software without specific 20 * prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 26 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 27 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * RiscBSD kernel project 35 * 36 * sys_machdep.c 37 * 38 * Machine dependant syscalls 39 * 40 * Created : 10/01/96 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: sys_machdep.c,v 1.11 2010/07/07 01:20:49 chs Exp $"); 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/proc.h> 49 #include <sys/mbuf.h> 50 #include <sys/mount.h> 51 #include <sys/cpu.h> 52 #include <uvm/uvm_extern.h> 53 #include <sys/sysctl.h> 54 #include <sys/syscallargs.h> 55 56 #include <machine/sysarch.h> 57 58 /* Prototypes */ 59 static int arm32_sync_icache(struct lwp *, const void *, register_t *); 60 static int arm32_drain_writebuf(struct lwp *, const void *, register_t *); 61 62 static int 63 arm32_sync_icache(struct lwp *l, const void *args, register_t *retval) 64 { 65 struct arm_sync_icache_args ua; 66 int error; 67 68 if ((error = copyin(args, &ua, sizeof(ua))) != 0) 69 return (error); 70 71 pmap_icache_sync_range(vm_map_pmap(&l->l_proc->p_vmspace->vm_map), 72 ua.addr, ua.addr + ua.len); 73 74 *retval = 0; 75 return(0); 76 } 77 78 static int 79 arm32_drain_writebuf(struct lwp *l, const void *args, register_t *retval) 80 { 81 /* No args. */ 82 83 cpu_drain_writebuf(); 84 85 *retval = 0; 86 return(0); 87 } 88 89 int 90 sys_sysarch(struct lwp *l, const struct sys_sysarch_args *uap, register_t *retval) 91 { 92 /* { 93 syscallarg(int) op; 94 syscallarg(void *) parms; 95 } */ 96 int error = 0; 97 98 switch(SCARG(uap, op)) { 99 case ARM_SYNC_ICACHE : 100 error = arm32_sync_icache(l, SCARG(uap, parms), retval); 101 break; 102 103 case ARM_DRAIN_WRITEBUF : 104 error = arm32_drain_writebuf(l, SCARG(uap, parms), retval); 105 break; 106 107 default: 108 error = EINVAL; 109 break; 110 } 111 return (error); 112 } 113 114 int 115 cpu_lwp_setprivate(lwp_t *l, void *addr) 116 { 117 #ifdef _ARM_ARCH_6 118 struct pcb *pcb; 119 120 pcb = lwp_getpcb(l); 121 kpreempt_disable(); 122 pcb->pcb_un.un_32.pcb32_user_pid_ro = (u_int)addr; 123 if (l == curlwp) 124 __asm("mcr p15, 0, %0, c13, c0, 3" : : "r" (addr)); 125 kpreempt_enable(); 126 return 0; 127 #else 128 return ENOSYS; 129 #endif 130 } 131