Annotation of sys/arch/arm/arm/arm_machdep.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: arm_machdep.c,v 1.1 2004/02/01 05:09:48 drahn Exp $ */
! 2: /* $NetBSD: arm_machdep.c,v 1.7 2003/10/25 19:44:42 scw Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 2001 Wasabi Systems, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * Written by Jason R. Thorpe for Wasabi Systems, Inc.
! 9: *
! 10: * Redistribution and use in source and binary forms, with or without
! 11: * modification, are permitted provided that the following conditions
! 12: * are met:
! 13: * 1. Redistributions of source code must retain the above copyright
! 14: * notice, this list of conditions and the following disclaimer.
! 15: * 2. Redistributions in binary form must reproduce the above copyright
! 16: * notice, this list of conditions and the following disclaimer in the
! 17: * documentation and/or other materials provided with the distribution.
! 18: * 3. All advertising materials mentioning features or use of this software
! 19: * must display the following acknowledgement:
! 20: * This product includes software developed for the NetBSD Project by
! 21: * Wasabi Systems, Inc.
! 22: * 4. The name of Wasabi Systems, Inc. may not be used to endorse
! 23: * or promote products derived from this software without specific prior
! 24: * written permission.
! 25: *
! 26: * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
! 27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 28: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 29: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
! 30: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 31: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 32: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 33: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 34: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 35: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 36: * POSSIBILITY OF SUCH DAMAGE.
! 37: */
! 38:
! 39: /*
! 40: * Copyright (c) 1994-1998 Mark Brinicombe.
! 41: * Copyright (c) 1994 Brini.
! 42: * All rights reserved.
! 43: *
! 44: * This code is derived from software written for Brini by Mark Brinicombe
! 45: *
! 46: * Redistribution and use in source and binary forms, with or without
! 47: * modification, are permitted provided that the following conditions
! 48: * are met:
! 49: * 1. Redistributions of source code must retain the above copyright
! 50: * notice, this list of conditions and the following disclaimer.
! 51: * 2. Redistributions in binary form must reproduce the above copyright
! 52: * notice, this list of conditions and the following disclaimer in the
! 53: * documentation and/or other materials provided with the distribution.
! 54: * 3. All advertising materials mentioning features or use of this software
! 55: * must display the following acknowledgement:
! 56: * This product includes software developed by Mark Brinicombe
! 57: * for the NetBSD Project.
! 58: * 4. The name of the company nor the name of the author may be used to
! 59: * endorse or promote products derived from this software without specific
! 60: * prior written permission.
! 61: *
! 62: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
! 63: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
! 64: * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 65: * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
! 66: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
! 67: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
! 68: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 69: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 70: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 71: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 72: * SUCH DAMAGE.
! 73: */
! 74:
! 75: #include <sys/param.h>
! 76:
! 77: #include <sys/exec.h>
! 78: #include <sys/proc.h>
! 79: #include <sys/systm.h>
! 80: #include <sys/user.h>
! 81: #include <sys/pool.h>
! 82:
! 83: #include <arm/cpufunc.h>
! 84:
! 85: #include <machine/pcb.h>
! 86: #include <machine/vmparam.h>
! 87: #include <machine/bus.h>
! 88:
! 89: static __inline struct trapframe *
! 90: process_frame(struct proc *p)
! 91: {
! 92:
! 93: return (p->p_addr->u_pcb.pcb_tf);
! 94: }
! 95:
! 96: /*
! 97: * The ARM architecture places the vector page at address 0.
! 98: * Later ARM architecture versions, however, allow it to be
! 99: * relocated to a high address (0xffff0000). This is primarily
! 100: * to support the Fast Context Switch Extension.
! 101: *
! 102: * This variable contains the address of the vector page. It
! 103: * defaults to 0; it only needs to be initialized if we enable
! 104: * relocated vectors.
! 105: */
! 106: vaddr_t vector_page;
! 107:
! 108: /*
! 109: * Clear registers on exec
! 110: */
! 111:
! 112: void
! 113: setregs(struct proc *p, struct exec_package *pack, u_long stack,
! 114: register_t *retval)
! 115: {
! 116: struct trapframe *tf;
! 117:
! 118: tf = p->p_addr->u_pcb.pcb_tf;
! 119:
! 120: memset(tf, 0, sizeof(*tf));
! 121: /* tf->tf_r0 = (u_int)p->p_proc->p_psstr; */
! 122: tf->tf_usr_sp = stack;
! 123: tf->tf_usr_lr = pack->ep_entry;
! 124: tf->tf_svc_lr = 0x77777777; /* Something we can see */
! 125: tf->tf_pc = pack->ep_entry;
! 126: #ifdef __PROG32
! 127: tf->tf_spsr = PSR_USR32_MODE;
! 128: #endif
! 129:
! 130: p->p_addr->u_pcb.pcb_flags = 0;
! 131: retval[1] = 0;
! 132: }
! 133:
! 134: #if 0
! 135: /*
! 136: * startlwp:
! 137: *
! 138: * Start a new LWP.
! 139: */
! 140: void
! 141: startlwp(void *arg)
! 142: {
! 143: int err;
! 144: ucontext_t *uc = arg;
! 145: struct lwp *l = curlwp;
! 146:
! 147: err = cpu_setmcontext(l, &uc->uc_mcontext, uc->uc_flags);
! 148: #ifdef DIAGNOSTIC
! 149: if (err)
! 150: printf("Error %d from cpu_setmcontext.", err);
! 151: #endif
! 152: pool_put(&lwp_uc_pool, uc);
! 153:
! 154: userret(l);
! 155: }
! 156:
! 157: /*
! 158: * XXX This is a terrible name.
! 159: */
! 160: void
! 161: upcallret(struct lwp *l)
! 162: {
! 163:
! 164: userret(l);
! 165: }
! 166:
! 167: /*
! 168: * cpu_upcall:
! 169: *
! 170: * Send an an upcall to userland.
! 171: */
! 172: void
! 173: cpu_upcall(struct lwp *l, int type, int nevents, int ninterrupted, void *sas,
! 174: void *ap, void *sp, sa_upcall_t upcall)
! 175: {
! 176: struct trapframe *tf;
! 177: struct saframe *sf, frame;
! 178:
! 179: tf = process_frame(l);
! 180:
! 181: /* Finally, copy out the rest of the frame. */
! 182: #if 0 /* First 4 args in regs (see below). */
! 183: frame.sa_type = type;
! 184: frame.sa_sas = sas;
! 185: frame.sa_events = nevents;
! 186: frame.sa_interrupted = ninterrupted;
! 187: #endif
! 188: frame.sa_arg = ap;
! 189:
! 190: sf = (struct saframe *)sp - 1;
! 191: if (copyout(&frame, sf, sizeof(frame)) != 0) {
! 192: /* Copying onto the stack didn't work. Die. */
! 193: sigexit(l, SIGILL);
! 194: /* NOTREACHED */
! 195: }
! 196:
! 197: tf->tf_r0 = type;
! 198: tf->tf_r1 = (int) sas;
! 199: tf->tf_r2 = nevents;
! 200: tf->tf_r3 = ninterrupted;
! 201: tf->tf_pc = (int) upcall;
! 202: tf->tf_usr_sp = (int) sf;
! 203: tf->tf_usr_lr = 0; /* no return */
! 204: }
! 205: #endif
! 206:
! 207:
! 208: #define _CONCAT(A,B) A ## B
! 209: #define __C(A,B) _CONCAT(A,B)
! 210:
! 211: #define BUS_SPACE_COPY_N(BYTES,TYPE) \
! 212: void \
! 213: __C(bus_space_copy_,BYTES)(bus_space_tag_t bst, bus_space_handle_t h1, \
! 214: bus_size_t o1, bus_space_handle_t h2, bus_size_t o2, \
! 215: bus_size_t c) \
! 216: { \
! 217: int i; \
! 218: \
! 219: if (h1 == h2 && o2 > o1) \
! 220: for (i = c-1; i >= 0; i--) \
! 221: __C(bus_space_write_,BYTES)(bst, h2, o2+(BYTES*i), \
! 222: __C(bus_space_read_,BYTES)(bst, h1, o1+(BYTES*i))); \
! 223: else \
! 224: for (i = 0; i < c; i++) \
! 225: __C(bus_space_write_,BYTES)(bst, h2, o2+(BYTES*i), \
! 226: __C(bus_space_read_,BYTES)(bst, h1, o1+(BYTES*i))); \
! 227: }
! 228: BUS_SPACE_COPY_N(1,u_int8_t)
! 229: BUS_SPACE_COPY_N(2,u_int16_t)
! 230: BUS_SPACE_COPY_N(4,u_int32_t)
! 231:
! 232:
! 233:
! 234: #if 0
! 235: #define BUS_SPACE_READ_RAW_MULTI_N(BYTES,SHIFT,TYPE) \
! 236: void \
! 237: __C(bus_space_read_raw_multi_,BYTES)(bus_space_tag_t bst, \
! 238: bus_space_handle_t h, bus_addr_t o, u_int8_t *dst, bus_size_t size) \
! 239: { \
! 240: TYPE *src; \
! 241: TYPE *rdst = (TYPE *)dst; \
! 242: int i; \
! 243: int count = size >> SHIFT; \
! 244: \
! 245: src = (TYPE *)(h+o); \
! 246: for (i = 0; i < count; i++) { \
! 247: rdst[i] = *src; \
! 248: } \
! 249: }
! 250: BUS_SPACE_READ_RAW_MULTI_N(2,1,u_int16_t)
! 251: BUS_SPACE_READ_RAW_MULTI_N(4,2,u_int32_t)
! 252:
! 253: #define BUS_SPACE_WRITE_RAW_MULTI_N(BYTES,SHIFT,TYPE) \
! 254: void \
! 255: __C(bus_space_write_raw_multi_,BYTES)( bus_space_tag_t bst, \
! 256: bus_space_handle_t h, bus_addr_t o, const u_int8_t *src, \
! 257: bus_size_t size) \
! 258: { \
! 259: int i; \
! 260: TYPE *dst; \
! 261: TYPE *rsrc = (TYPE *)src; \
! 262: int count = size >> SHIFT; \
! 263: \
! 264: dst = (TYPE *)(h+o); \
! 265: for (i = 0; i < count; i++) { \
! 266: *dst = rsrc[i]; \
! 267: } \
! 268: }
! 269:
! 270: BUS_SPACE_WRITE_RAW_MULTI_N(2,1,u_int16_t)
! 271: BUS_SPACE_WRITE_RAW_MULTI_N(4,2,u_int32_t)
! 272: #endif
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