2 * Copyright (c) 1982, 1986 The Regents of the University of California.
3 * Copyright (c) 1989, 1990 William Jolitz
4 * Copyright (c) 1994 John Dyson
7 * This code is derived from software contributed to Berkeley by
8 * the Systems Programming Group of the University of Utah Computer
9 * Science Department, and William Jolitz.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 * from: @(#)vm_machdep.c 7.3 (Berkeley) 5/13/91
40 * Utah $Hdr: vm_machdep.c 1.16.1.1 89/06/23$
44 * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
45 * All rights reserved.
47 * Author: Chris G. Demetriou
49 * Permission to use, copy, modify and distribute this software and
50 * its documentation is hereby granted, provided that both the copyright
51 * notice and this permission notice appear in all copies of the
52 * software, derivative works or modified versions, and any portions
53 * thereof, and that both notices appear in supporting documentation.
55 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
56 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
57 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
59 * Carnegie Mellon requests users of this software to return to
61 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
62 * School of Computer Science
63 * Carnegie Mellon University
64 * Pittsburgh PA 15213-3890
66 * any improvements or extensions that they make and grant Carnegie the
67 * rights to redistribute these changes.
70 #include <sys/param.h>
71 #include <sys/systm.h>
73 #include <sys/malloc.h>
76 #include <sys/sysent.h>
77 #include <sys/vnode.h>
78 #include <sys/vmmeter.h>
79 #include <sys/kernel.h>
81 #include <sys/sf_buf.h>
82 #include <sys/sysctl.h>
83 #include <sys/unistd.h>
85 #include <machine/cpu.h>
86 #include <machine/fpu.h>
87 #include <machine/md_var.h>
88 #include <machine/pcb.h>
91 #include <vm/vm_param.h>
93 #include <vm/vm_kern.h>
94 #include <vm/vm_page.h>
95 #include <vm/vm_map.h>
96 #include <vm/vm_extern.h>
98 #include <i386/include/psl.h>
101 cpu_thread_exit(struct thread *td)
104 /* Throw away the high FP registers. */
105 ia64_highfp_drop(td);
109 cpu_thread_clean(struct thread *td)
114 cpu_thread_alloc(struct thread *td)
118 sp = td->td_kstack + td->td_kstack_pages * PAGE_SIZE;
119 sp -= sizeof(struct pcb);
120 td->td_pcb = (struct pcb *)sp;
121 sp -= sizeof(struct trapframe);
122 td->td_frame = (struct trapframe *)sp;
123 td->td_frame->tf_length = sizeof(struct trapframe);
127 cpu_thread_free(struct thread *td)
132 cpu_thread_swapin(struct thread *td)
137 cpu_thread_swapout(struct thread *td)
140 ia64_highfp_save(td);
144 cpu_set_syscall_retval(struct thread *td, int error)
147 struct trapframe *tf;
149 if (error == EJUSTRETURN)
155 * Save the "raw" error code in r10. We use this to handle
156 * syscall restarts (see do_ast()).
158 tf->tf_scratch.gr10 = error;
160 tf->tf_scratch.gr8 = td->td_retval[0];
161 tf->tf_scratch.gr9 = td->td_retval[1];
162 } else if (error != ERESTART) {
164 if (error < p->p_sysent->sv_errsize)
165 error = p->p_sysent->sv_errtbl[error];
167 * Translated error codes are returned in r8. User
169 tf->tf_scratch.gr8 = error;
174 cpu_set_upcall(struct thread *td, struct thread *td0)
177 struct trapframe *tf;
179 ia64_highfp_save(td0);
182 KASSERT(tf != NULL, ("foo"));
183 bcopy(td0->td_frame, tf, sizeof(*tf));
184 tf->tf_length = sizeof(struct trapframe);
185 tf->tf_flags = FRAME_SYSCALL;
186 tf->tf_special.ndirty = 0;
187 tf->tf_special.bspstore &= ~0x1ffUL;
188 tf->tf_scratch.gr8 = 0;
189 tf->tf_scratch.gr9 = 1;
190 tf->tf_scratch.gr10 = 0;
193 KASSERT(pcb != NULL, ("foo"));
194 bcopy(td0->td_pcb, pcb, sizeof(*pcb));
195 pcb->pcb_special.bspstore = td->td_kstack;
196 pcb->pcb_special.pfs = 0;
197 pcb->pcb_current_pmap = vmspace_pmap(td->td_proc->p_vmspace);
198 pcb->pcb_special.sp = (uintptr_t)tf - 16;
199 pcb->pcb_special.rp = FDESC_FUNC(fork_trampoline);
200 cpu_set_fork_handler(td, (void (*)(void*))fork_return, td);
202 /* Setup to release the spin count in fork_exit(). */
203 td->td_md.md_spinlock_count = 1;
204 td->td_md.md_saved_intr = 1;
208 cpu_set_upcall_kse(struct thread *td, void (*entry)(void *), void *arg,
211 struct ia64_fdesc *fd;
212 struct trapframe *tf;
216 ndirty = tf->tf_special.ndirty + (tf->tf_special.bspstore & 0x1ffUL);
218 KASSERT((ndirty & ~PAGE_MASK) == 0,
219 ("Whoa there! We have more than 8KB of dirty registers!"));
221 fd = (struct ia64_fdesc *)entry;
222 sp = (uint64_t)stack->ss_sp;
224 bzero(&tf->tf_special, sizeof(tf->tf_special));
225 tf->tf_special.iip = fuword(&fd->func);
226 tf->tf_special.gp = fuword(&fd->gp);
227 tf->tf_special.sp = (sp + stack->ss_size - 16) & ~15;
228 tf->tf_special.rsc = 0xf;
229 tf->tf_special.fpsr = IA64_FPSR_DEFAULT;
230 tf->tf_special.psr = IA64_PSR_IC | IA64_PSR_I | IA64_PSR_IT |
231 IA64_PSR_DT | IA64_PSR_RT | IA64_PSR_DFH | IA64_PSR_BN |
234 if (tf->tf_flags & FRAME_SYSCALL) {
235 tf->tf_special.cfm = (3UL<<62) | (1UL<<7) | 1UL;
236 tf->tf_special.bspstore = sp + 8;
237 suword((caddr_t)sp, (uint64_t)arg);
239 tf->tf_special.cfm = (1UL<<63) | (1UL<<7) | 1UL;
240 tf->tf_special.bspstore = sp;
241 tf->tf_special.ndirty = 8;
242 sp = td->td_kstack + ndirty - 8;
243 if ((sp & 0x1ff) == 0x1f8) {
245 tf->tf_special.ndirty += 8;
248 *(uint64_t*)sp = (uint64_t)arg;
253 cpu_set_user_tls(struct thread *td, void *tls_base)
255 td->td_frame->tf_special.tp = (unsigned long)tls_base;
260 * Finish a fork operation, with process p2 nearly set up.
261 * Copy and update the pcb, set up the stack so that the child
262 * ready to run and return to user mode.
265 cpu_fork(struct thread *td1, struct proc *p2 __unused, struct thread *td2,
271 KASSERT(td1 == curthread || td1 == &thread0,
272 ("cpu_fork: td1 not curthread and not thread0"));
274 if ((flags & RFPROC) == 0)
278 * Save the preserved registers and the high FP registers in the
279 * PCB if we're the parent (ie td1 == curthread) so that we have
280 * a valid PCB. This also causes a RSE flush. We don't have to
281 * do that otherwise, because there wouldn't be anything important
284 if (td1 == curthread) {
285 if (savectx(td1->td_pcb) != 0)
286 panic("unexpected return from savectx()");
287 ia64_highfp_save(td1);
291 * create the child's kernel stack and backing store. We basicly
292 * create an image of the parent's stack and backing store and
293 * adjust where necessary.
295 stackp = (char *)(td2->td_kstack + td2->td_kstack_pages * PAGE_SIZE);
297 stackp -= sizeof(struct pcb);
298 td2->td_pcb = (struct pcb *)stackp;
299 bcopy(td1->td_pcb, td2->td_pcb, sizeof(struct pcb));
301 stackp -= sizeof(struct trapframe);
302 td2->td_frame = (struct trapframe *)stackp;
303 bcopy(td1->td_frame, td2->td_frame, sizeof(struct trapframe));
304 td2->td_frame->tf_length = sizeof(struct trapframe);
305 ndirty = td2->td_frame->tf_special.ndirty +
306 (td2->td_frame->tf_special.bspstore & 0x1ffUL);
307 bcopy((void*)td1->td_kstack, (void*)td2->td_kstack, ndirty);
309 /* Set-up the return values as expected by the fork() libc stub. */
310 if (td2->td_frame->tf_special.psr & IA64_PSR_IS) {
311 td2->td_frame->tf_scratch.gr8 = 0;
312 td2->td_frame->tf_scratch.gr10 = 1;
314 td2->td_frame->tf_scratch.gr8 = 0;
315 td2->td_frame->tf_scratch.gr9 = 1;
316 td2->td_frame->tf_scratch.gr10 = 0;
319 td2->td_pcb->pcb_special.bspstore = td2->td_kstack + ndirty;
320 td2->td_pcb->pcb_special.pfs = 0;
321 td2->td_pcb->pcb_current_pmap = vmspace_pmap(td2->td_proc->p_vmspace);
323 td2->td_pcb->pcb_special.sp = (uintptr_t)stackp - 16;
324 td2->td_pcb->pcb_special.rp = FDESC_FUNC(fork_trampoline);
325 cpu_set_fork_handler(td2, (void (*)(void*))fork_return, td2);
327 /* Setup to release the spin count in fork_exit(). */
328 td2->td_md.md_spinlock_count = 1;
329 td2->td_md.md_saved_intr = 1;
333 * Intercept the return address from a freshly forked process that has NOT
334 * been scheduled yet.
336 * This is needed to make kernel threads stay in kernel mode.
339 cpu_set_fork_handler(td, func, arg)
341 void (*func)(void *);
344 td->td_frame->tf_scratch.gr2 = (u_int64_t)func;
345 td->td_frame->tf_scratch.gr3 = (u_int64_t)arg;
349 * cpu_exit is called as the last action during exit.
350 * We drop the fp state (if we have it) and switch to a live one.
353 cpu_exit(struct thread *td)
358 * Allocate an sf_buf for the given vm_page. On this machine, however, there
359 * is no sf_buf object. Instead, an opaque pointer to the given vm_page is
363 sf_buf_alloc(struct vm_page *m, int pri)
366 return ((struct sf_buf *)m);
370 * Free the sf_buf. In fact, do nothing because there are no resources
371 * associated with the sf_buf.
374 sf_buf_free(struct sf_buf *sf)
379 * Software interrupt handler for queued VM system processing.
385 if (busdma_swi_pending != 0)