machdep.c revision 170170
180708Sjake/*-
280708Sjake * Copyright (c) 2001 Jake Burkholder.
382902Sjake * Copyright (c) 1992 Terrence R. Lambert.
482902Sjake * Copyright (c) 1982, 1987, 1990 The Regents of the University of California.
580708Sjake * All rights reserved.
680708Sjake *
782902Sjake * This code is derived from software contributed to Berkeley by
882902Sjake * William Jolitz.
982902Sjake *
1080708Sjake * Redistribution and use in source and binary forms, with or without
1180708Sjake * modification, are permitted provided that the following conditions
1280708Sjake * are met:
1380708Sjake * 1. Redistributions of source code must retain the above copyright
1480708Sjake *    notice, this list of conditions and the following disclaimer.
1580708Sjake * 2. Redistributions in binary form must reproduce the above copyright
1680708Sjake *    notice, this list of conditions and the following disclaimer in the
1780708Sjake *    documentation and/or other materials provided with the distribution.
1882902Sjake * 4. Neither the name of the University nor the names of its contributors
1982902Sjake *    may be used to endorse or promote products derived from this software
2082902Sjake *    without specific prior written permission.
2180708Sjake *
2282902Sjake * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
2380708Sjake * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2480708Sjake * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2582902Sjake * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
2680708Sjake * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2780708Sjake * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2880708Sjake * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2980708Sjake * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
3080708Sjake * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
3180708Sjake * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
3280708Sjake * SUCH DAMAGE.
3380708Sjake *
3482902Sjake *	from: @(#)machdep.c	7.4 (Berkeley) 6/3/91
3582902Sjake * 	from: FreeBSD: src/sys/i386/i386/machdep.c,v 1.477 2001/08/27
3680708Sjake */
3780708Sjake
38145151Smarius#include <sys/cdefs.h>
39145151Smarius__FBSDID("$FreeBSD: head/sys/sparc64/sparc64/machdep.c 170170 2007-05-31 22:52:15Z attilio $");
40145151Smarius
41105950Speter#include "opt_compat.h"
4280709Sjake#include "opt_ddb.h"
43118239Speter#include "opt_kstack_pages.h"
4485242Sjake#include "opt_msgbuf.h"
4580709Sjake
4680708Sjake#include <sys/param.h>
47141378Snjl#include <sys/malloc.h>
48141378Snjl#include <sys/proc.h>
4980708Sjake#include <sys/systm.h>
50141249Snjl#include <sys/bio.h>
51141249Snjl#include <sys/buf.h>
52141249Snjl#include <sys/bus.h>
53141249Snjl#include <sys/cpu.h>
5480709Sjake#include <sys/cons.h>
55141378Snjl#include <sys/eventhandler.h>
56141378Snjl#include <sys/exec.h>
57102561Sjake#include <sys/imgact.h>
58141378Snjl#include <sys/interrupt.h>
59131950Smarcel#include <sys/kdb.h>
6080709Sjake#include <sys/kernel.h>
6185262Sjake#include <sys/ktr.h>
6280709Sjake#include <sys/linker.h>
6380709Sjake#include <sys/lock.h>
6485242Sjake#include <sys/msgbuf.h>
6580708Sjake#include <sys/mutex.h>
6680709Sjake#include <sys/pcpu.h>
67141378Snjl#include <sys/ptrace.h>
6885242Sjake#include <sys/reboot.h>
6980708Sjake#include <sys/signalvar.h>
7091616Sjake#include <sys/smp.h>
7182902Sjake#include <sys/sysent.h>
7280708Sjake#include <sys/sysproto.h>
7380709Sjake#include <sys/timetc.h>
7491156Sjake#include <sys/ucontext.h>
7580708Sjake
7680708Sjake#include <dev/ofw/openfirm.h>
7780708Sjake
7880709Sjake#include <vm/vm.h>
79141378Snjl#include <vm/vm_extern.h>
8080709Sjake#include <vm/vm_kern.h>
8180709Sjake#include <vm/vm_page.h>
8280709Sjake#include <vm/vm_map.h>
83141378Snjl#include <vm/vm_object.h>
8480709Sjake#include <vm/vm_pager.h>
85141378Snjl#include <vm/vm_param.h>
8680709Sjake
8780709Sjake#include <ddb/ddb.h>
8880709Sjake
89119696Smarcel#include <machine/bus.h>
9086521Sjake#include <machine/cache.h>
9181383Sjake#include <machine/clock.h>
9282902Sjake#include <machine/cpu.h>
9383366Sjulian#include <machine/fp.h>
94112922Sjake#include <machine/fsr.h>
9581383Sjake#include <machine/intr_machdep.h>
9680708Sjake#include <machine/md_var.h>
9788436Sjake#include <machine/metadata.h>
9886147Stmm#include <machine/ofw_machdep.h>
99115971Sjake#include <machine/ofw_mem.h>
100138129Sdas#include <machine/pcb.h>
10180709Sjake#include <machine/pmap.h>
10280709Sjake#include <machine/pstate.h>
10380708Sjake#include <machine/reg.h>
10482902Sjake#include <machine/sigframe.h>
105141378Snjl#include <machine/smp.h>
10681383Sjake#include <machine/tick.h>
10791613Sjake#include <machine/tlb.h>
10882016Sjake#include <machine/tstate.h>
10991616Sjake#include <machine/upa.h>
11082902Sjake#include <machine/ver.h>
11180708Sjake
11280709Sjaketypedef int ofw_vec_t(void *);
11380708Sjake
114131950Smarcel#ifdef DDB
115131950Smarcelextern vm_offset_t ksym_start, ksym_end;
116131950Smarcel#endif
117131950Smarcel
11897445Sjakestruct tlb_entry *kernel_tlbs;
11991616Sjakeint kernel_tlb_slots;
12091616Sjake
12180708Sjakeint cold = 1;
122102600Speterlong Maxmem;
123142956Sweslong realmem;
12480708Sjake
12591360Sjakechar pcpu0[PCPU_PAGES * PAGE_SIZE];
12689038Sjakestruct trapframe frame0;
12780708Sjake
12889038Sjakevm_offset_t kstack0;
129113238Sjakevm_paddr_t kstack0_phys;
13088781Sjake
13182902Sjakestruct kva_md_info kmi;
13280709Sjake
13380709Sjakeu_long ofw_vec;
13480709Sjakeu_long ofw_tba;
13580709Sjake
136135972Skensmith/*
137135972Skensmith * Note: timer quality for CPU's is set low to try and prevent them from
138135972Skensmith * being chosen as the primary timecounter.  The CPU counters are not
139135972Skensmith * synchronized among the CPU's so in MP machines this causes problems
140135972Skensmith * when calculating the time.  With this value the CPU's should only be
141135972Skensmith * chosen as the primary timecounter as a last resort.
142135972Skensmith */
143135972Skensmith
144135972Skensmith#define	UP_TICK_QUALITY	1000
145135972Skensmith#define	MP_TICK_QUALITY	-100
14680709Sjakestatic struct timecounter tick_tc;
14780709Sjake
148106555Stmmchar sparc64_model[32];
149106555Stmm
150113166Sjakestatic int cpu_use_vis = 1;
151113166Sjake
152113166Sjakecpu_block_copy_t *cpu_block_copy;
153113166Sjakecpu_block_zero_t *cpu_block_zero;
154113166Sjake
15580709Sjakestatic timecounter_get_t tick_get_timecount;
15691616Sjakevoid sparc64_init(caddr_t mdp, u_long o1, u_long o2, u_long o3,
15789038Sjake		  ofw_vec_t *vec);
15886147Stmmvoid sparc64_shutdown_final(void *dummy, int howto);
15980709Sjake
16080709Sjakestatic void cpu_startup(void *);
16180709SjakeSYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
16280709Sjake
16391336SjakeCTASSERT((1 << INT_SHIFT) == sizeof(int));
16491336SjakeCTASSERT((1 << PTR_SHIFT) == sizeof(char *));
16591336Sjake
166105733SjakeCTASSERT(sizeof(struct reg) == 256);
167105733SjakeCTASSERT(sizeof(struct fpreg) == 272);
168105733SjakeCTASSERT(sizeof(struct __mcontext) == 512);
169105733Sjake
170113023SjakeCTASSERT((sizeof(struct pcb) & (64 - 1)) == 0);
171113023SjakeCTASSERT((offsetof(struct pcb, pcb_kfp) & (64 - 1)) == 0);
172113023SjakeCTASSERT((offsetof(struct pcb, pcb_ufp) & (64 - 1)) == 0);
173113023SjakeCTASSERT(sizeof(struct pcb) <= ((KSTACK_PAGES * PAGE_SIZE) / 8));
174113023Sjake
17591360SjakeCTASSERT(sizeof(struct pcpu) <= ((PCPU_PAGES * PAGE_SIZE) / 2));
17689038Sjake
17780709Sjakestatic void
17880709Sjakecpu_startup(void *arg)
17980709Sjake{
180115971Sjake	vm_paddr_t physsz;
181115971Sjake	int i;
18280709Sjake
18380709Sjake	tick_tc.tc_get_timecount = tick_get_timecount;
18480709Sjake	tick_tc.tc_poll_pps = NULL;
18580709Sjake	tick_tc.tc_counter_mask = ~0u;
186105946Stmm	tick_tc.tc_frequency = tick_freq;
18780709Sjake	tick_tc.tc_name = "tick";
188135972Skensmith	tick_tc.tc_quality = UP_TICK_QUALITY;
189135972Skensmith#ifdef SMP
190135972Skensmith	/*
191135972Skensmith	 * We do not know if each CPU's tick counter is synchronized.
192135972Skensmith	 */
193135972Skensmith	if (cpu_mp_probe())
194135972Skensmith		tick_tc.tc_quality = MP_TICK_QUALITY;
195135972Skensmith#endif
196135972Skensmith
19780709Sjake	tc_init(&tick_tc);
19880709Sjake
199115971Sjake	physsz = 0;
200115971Sjake	for (i = 0; i < sparc64_nmemreg; i++)
201115971Sjake		physsz += sparc64_memreg[i].mr_size;
202115971Sjake	printf("real memory  = %lu (%lu MB)\n", physsz,
203115971Sjake	    physsz / (1024 * 1024));
204155680Sjhb	realmem = (long)physsz / PAGE_SIZE;
20580709Sjake
20682902Sjake	vm_ksubmap_init(&kmi);
20780709Sjake
20880709Sjake	bufinit();
20980709Sjake	vm_pager_bufferinit();
21080709Sjake
21186147Stmm	EVENTHANDLER_REGISTER(shutdown_final, sparc64_shutdown_final, NULL,
21286147Stmm	    SHUTDOWN_PRI_LAST);
213113338Sjake
214170170Sattilio	printf("avail memory = %lu (%lu MB)\n", cnt.v_free_count * PAGE_SIZE,
215170170Sattilio	    cnt.v_free_count / ((1024 * 1024) / PAGE_SIZE));
216113338Sjake
217113338Sjake	if (bootverbose)
218113338Sjake		printf("machine: %s\n", sparc64_model);
219113338Sjake
220113338Sjake	cpu_identify(rdpr(ver), tick_freq, PCPU_GET(cpuid));
22180709Sjake}
22280709Sjake
22387702Sjhbvoid
22487702Sjhbcpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
22587702Sjhb{
22697265Sjake	struct intr_request *ir;
22797265Sjake	int i;
22897265Sjake
22997265Sjake	pcpu->pc_irtail = &pcpu->pc_irhead;
23097265Sjake	for (i = 0; i < IR_FREE; i++) {
23197265Sjake		ir = &pcpu->pc_irpool[i];
23297265Sjake		ir->ir_next = pcpu->pc_irfree;
23397265Sjake		pcpu->pc_irfree = ir;
23497265Sjake	}
23587702Sjhb}
23687702Sjhb
237144637Sjhbvoid
238144637Sjhbspinlock_enter(void)
239144637Sjhb{
240144637Sjhb	struct thread *td;
241145085Sjhb	register_t pil;
242144637Sjhb
243144637Sjhb	td = curthread;
244144637Sjhb	if (td->td_md.md_spinlock_count == 0) {
245145085Sjhb		pil = rdpr(pil);
246145151Smarius		wrpr(pil, 0, PIL_TICK);
247145085Sjhb		td->td_md.md_saved_pil = pil;
248144637Sjhb	}
249144637Sjhb	td->td_md.md_spinlock_count++;
250144637Sjhb	critical_enter();
251144637Sjhb}
252144637Sjhb
253144637Sjhbvoid
254144637Sjhbspinlock_exit(void)
255144637Sjhb{
256144637Sjhb	struct thread *td;
257144637Sjhb
258144637Sjhb	td = curthread;
259144637Sjhb	critical_exit();
260144637Sjhb	td->td_md.md_spinlock_count--;
261144637Sjhb	if (td->td_md.md_spinlock_count == 0)
262144637Sjhb		wrpr(pil, td->td_md.md_saved_pil, 0);
263144637Sjhb}
264144637Sjhb
26580709Sjakeunsigned
26680709Sjaketick_get_timecount(struct timecounter *tc)
26780709Sjake{
26880709Sjake	return ((unsigned)rd(tick));
26980709Sjake}
27080709Sjake
27180708Sjakevoid
27291616Sjakesparc64_init(caddr_t mdp, u_long o1, u_long o2, u_long o3, ofw_vec_t *vec)
27380708Sjake{
274101898Sjake	phandle_t child;
275101898Sjake	phandle_t root;
27689038Sjake	struct pcpu *pc;
27786521Sjake	vm_offset_t end;
27886521Sjake	caddr_t kmdp;
279105946Stmm	u_int clock;
280105569Smux	char *env;
281101898Sjake	char type[8];
28280709Sjake
28386521Sjake	end = 0;
28486521Sjake	kmdp = NULL;
28586521Sjake
28680709Sjake	/*
287112398Sjake	 * Find out what kind of cpu we have first, for anything that changes
288112398Sjake	 * behaviour.
289112398Sjake	 */
290112398Sjake	cpu_impl = VER_IMPL(rdpr(ver));
291112398Sjake
292112398Sjake	/*
293133862Smarius	 * Initialize Open Firmware (needed for console).
29480709Sjake	 */
29580709Sjake	OF_init(vec);
29680709Sjake
29780709Sjake	/*
29886521Sjake	 * Parse metadata if present and fetch parameters.  Must be before the
29986521Sjake	 * console is inited so cninit gets the right value of boothowto.
30086521Sjake	 */
30186521Sjake	if (mdp != NULL) {
30286521Sjake		preload_metadata = mdp;
303114374Speter		kmdp = preload_search_by_type("elf kernel");
30486521Sjake		if (kmdp != NULL) {
30586521Sjake			boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
30686521Sjake			kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *);
30786521Sjake			end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
30891616Sjake			kernel_tlb_slots = MD_FETCH(kmdp, MODINFOMD_DTLB_SLOTS,
30991616Sjake			    int);
31097445Sjake			kernel_tlbs = (void *)preload_search_info(kmdp,
31191616Sjake			    MODINFO_METADATA | MODINFOMD_DTLB);
31286521Sjake		}
31386521Sjake	}
31486521Sjake
315122462Sjake	init_param1();
316122462Sjake
317122462Sjake	root = OF_peer(0);
318122462Sjake	for (child = OF_child(root); child != 0; child = OF_peer(child)) {
319122462Sjake		OF_getprop(child, "device_type", type, sizeof(type));
320122462Sjake		if (strcmp(type, "cpu") == 0)
321122462Sjake			break;
322122462Sjake	}
323122462Sjake
324157227Smarius	/*
325157227Smarius	 * Initialize the tick counter.  Must be before the console is inited
326157227Smarius	 * in order to provide the low-level console drivers with a working
327157227Smarius	 * DELAY().
328157227Smarius	 */
329122462Sjake	OF_getprop(child, "clock-frequency", &clock, sizeof(clock));
330122462Sjake	tick_init(clock);
331122462Sjake
33286521Sjake	/*
33380709Sjake	 * Initialize the console before printing anything.
33480709Sjake	 */
33588639Sjake	cninit();
33680709Sjake
33780709Sjake	/*
338157227Smarius	 * Panic if there is no metadata.  Most likely the kernel was booted
33986521Sjake	 * directly, instead of through loader(8).
34080709Sjake	 */
34186521Sjake	if (mdp == NULL || kmdp == NULL) {
34286521Sjake		printf("sparc64_init: no loader metadata.\n"
34386521Sjake		       "This probably means you are not using loader(8).\n");
34486521Sjake		panic("sparc64_init");
34586521Sjake	}
34680709Sjake
34781383Sjake	/*
34886521Sjake	 * Sanity check the kernel end, which is important.
34986521Sjake	 */
35086521Sjake	if (end == 0) {
35186521Sjake		printf("sparc64_init: warning, kernel end not specified.\n"
35286521Sjake		       "Attempting to continue anyway.\n");
35386521Sjake		end = (vm_offset_t)_end;
35486521Sjake	}
35586521Sjake
356101898Sjake	cache_init(child);
357166968Smarius	uma_set_align(cache.dc_linesize - 1);
358101898Sjake
359169178Smarius	cpu_block_copy = bcopy;
360169178Smarius	cpu_block_zero = bzero;
361113166Sjake	getenv_int("machdep.use_vis", &cpu_use_vis);
362113166Sjake	if (cpu_use_vis) {
363169178Smarius		switch (cpu_impl) {
364169178Smarius		case CPU_IMPL_SPARC64:
365169178Smarius		case CPU_IMPL_ULTRASPARCI:
366169178Smarius		case CPU_IMPL_ULTRASPARCII:
367169178Smarius		case CPU_IMPL_ULTRASPARCIIi:
368169178Smarius		case CPU_IMPL_ULTRASPARCIIe:
369169178Smarius			cpu_block_copy = spitfire_block_copy;
370169178Smarius			cpu_block_zero = spitfire_block_zero;
371169178Smarius			break;
372169178Smarius		}
373113166Sjake	}
374113166Sjake
37591616Sjake#ifdef SMP
37691616Sjake	mp_tramp = mp_tramp_alloc();
37791616Sjake#endif
37891616Sjake
37986521Sjake	/*
38090625Stmm	 * Initialize virtual memory and calculate physmem.
38187546Sdillon	 */
38290625Stmm	pmap_bootstrap(end);
38387546Sdillon
38487546Sdillon	/*
38581383Sjake	 * Initialize tunables.
38681383Sjake	 */
38787546Sdillon	init_param2(physmem);
388105569Smux	env = getenv("kernelname");
389105569Smux	if (env != NULL) {
390105569Smux		strlcpy(kernelname, env, sizeof(kernelname));
391105569Smux		freeenv(env);
392105569Smux	}
39381085Sjake
39480709Sjake	/*
39589038Sjake	 * Initialize the interrupt tables.
39689038Sjake	 */
39790624Stmm	intr_init1();
39880709Sjake
39980709Sjake	/*
40080709Sjake	 * Initialize proc0 stuff (p_contested needs to be done early).
40180709Sjake	 */
402163709Sjb	proc_linkup(&proc0, &thread0);
40395744Sjake	proc0.p_md.md_sigtramp = NULL;
40488822Stmm	proc0.p_md.md_utrap = NULL;
40590361Sjulian	thread0.td_kstack = kstack0;
40690361Sjulian	thread0.td_pcb = (struct pcb *)
40790361Sjulian	    (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
408105908Sjake	frame0.tf_tstate = TSTATE_IE | TSTATE_PEF | TSTATE_PRIV;
40990361Sjulian	thread0.td_frame = &frame0;
41080709Sjake
41180709Sjake	/*
41289038Sjake	 * Prime our per-cpu data page for use.  Note, we are using it for our
41389038Sjake	 * stack, so don't pass the real size (PAGE_SIZE) to pcpu_init or
41489038Sjake	 * it'll zero it out from under us.
41580709Sjake	 */
416163973Sjb	pc = (struct pcpu *)(pcpu0 + (PCPU_PAGES * PAGE_SIZE)) - 1;
41789038Sjake	pcpu_init(pc, 0, sizeof(struct pcpu));
41890361Sjulian	pc->pc_curthread = &thread0;
41991156Sjake	pc->pc_curpcb = thread0.td_pcb;
42091616Sjake	pc->pc_mid = UPA_CR_GET_MID(ldxa(0, ASI_UPA_CONFIG_REG));
42191616Sjake	pc->pc_addr = (vm_offset_t)pcpu0;
422101898Sjake	pc->pc_node = child;
42391613Sjake	pc->pc_tlb_ctx = TLB_CTX_USER_MIN;
42491613Sjake	pc->pc_tlb_ctx_min = TLB_CTX_USER_MIN;
42591613Sjake	pc->pc_tlb_ctx_max = TLB_CTX_USER_MAX;
42688639Sjake
42780709Sjake	/*
428163973Sjb	 * Initialize global registers.
429163973Sjb	 */
430163973Sjb	cpu_setregs(pc);
431163973Sjb
432163973Sjb	/*
433108301Sjake	 * Initialize the message buffer (after setting trap table).
43488822Stmm	 */
43588822Stmm	msgbufinit(msgbufp, MSGBUF_SIZE);
43688822Stmm
43793702Sjhb	mutex_init();
43890624Stmm	intr_init2();
439105946Stmm
440133451Salc	/*
441133451Salc	 * Finish pmap initialization now that we're ready for mutexes.
442133451Salc	 */
443133451Salc	PMAP_LOCK_INIT(kernel_pmap);
444133451Salc
445106555Stmm	OF_getprop(root, "name", sparc64_model, sizeof(sparc64_model) - 1);
446122604Ssimokawa
447131950Smarcel	kdb_init();
448131950Smarcel
449131950Smarcel#ifdef KDB
450122604Ssimokawa	if (boothowto & RB_KDB)
451131950Smarcel		kdb_enter("Boot flags requested debugger");
452122604Ssimokawa#endif
45380708Sjake}
45480708Sjake
45580708Sjakevoid
45680709Sjakeset_openfirm_callback(ofw_vec_t *vec)
45780709Sjake{
45880709Sjake	ofw_tba = rdpr(tba);
45980709Sjake	ofw_vec = (u_long)vec;
46080709Sjake}
46180709Sjake
46280709Sjakevoid
463151316Sdavidxusendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
46480708Sjake{
46582902Sjake	struct trapframe *tf;
46682902Sjake	struct sigframe *sfp;
46782902Sjake	struct sigacts *psp;
46882902Sjake	struct sigframe sf;
46983366Sjulian	struct thread *td;
47085242Sjake	struct frame *fp;
47182902Sjake	struct proc *p;
47285242Sjake	int oonstack;
47382902Sjake	u_long sp;
474151316Sdavidxu	int sig;
47582902Sjake
47682902Sjake	oonstack = 0;
47783366Sjulian	td = curthread;
47883366Sjulian	p = td->td_proc;
479114983Sjhb	PROC_LOCK_ASSERT(p, MA_OWNED);
480151316Sdavidxu	sig = ksi->ksi_signo;
48182902Sjake	psp = p->p_sigacts;
482114983Sjhb	mtx_assert(&psp->ps_mtx, MA_OWNED);
48383366Sjulian	tf = td->td_frame;
48482902Sjake	sp = tf->tf_sp + SPOFF;
48582902Sjake	oonstack = sigonstack(sp);
48682902Sjake
48783366Sjulian	CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
48882902Sjake	    catcher, sig);
48982902Sjake
490102554Sjake	/* Make sure we have a signal trampoline to return to. */
491102554Sjake	if (p->p_md.md_sigtramp == NULL) {
492102554Sjake		/*
493157445Smarius		 * No signal trampoline... kill the process.
494102554Sjake		 */
495102554Sjake		CTR0(KTR_SIG, "sendsig: no sigtramp");
496102873Sjake		printf("sendsig: %s is too old, rebuild it\n", p->p_comm);
497102554Sjake		sigexit(td, sig);
498102554Sjake		/* NOTREACHED */
499102554Sjake	}
500102554Sjake
50182902Sjake	/* Save user context. */
50282902Sjake	bzero(&sf, sizeof(sf));
503118708Sjake	get_mcontext(td, &sf.sf_uc.uc_mcontext, 0);
50482902Sjake	sf.sf_uc.uc_sigmask = *mask;
505124092Sdavidxu	sf.sf_uc.uc_stack = td->td_sigstk;
506124092Sdavidxu	sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK)
50782902Sjake	    ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE;
50882902Sjake
50982902Sjake	/* Allocate and validate space for the signal handler context. */
510124092Sdavidxu	if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&
51182902Sjake	    SIGISMEMBER(psp->ps_sigonstack, sig)) {
512124092Sdavidxu		sfp = (struct sigframe *)(td->td_sigstk.ss_sp +
513124092Sdavidxu		    td->td_sigstk.ss_size - sizeof(struct sigframe));
51482902Sjake	} else
51582902Sjake		sfp = (struct sigframe *)sp - 1;
516114983Sjhb	mtx_unlock(&psp->ps_mtx);
51782902Sjake	PROC_UNLOCK(p);
51882902Sjake
51985242Sjake	fp = (struct frame *)sfp - 1;
52082902Sjake
52182902Sjake	/* Translate the signal if appropriate. */
52282902Sjake	if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize)
52382902Sjake		sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)];
52482902Sjake
52582902Sjake	/* Build the argument list for the signal handler. */
52682902Sjake	tf->tf_out[0] = sig;
52782902Sjake	tf->tf_out[2] = (register_t)&sfp->sf_uc;
52882902Sjake	tf->tf_out[4] = (register_t)catcher;
529157445Smarius	if (SIGISMEMBER(psp->ps_siginfo, sig)) {
530157445Smarius		/* Signal handler installed with SA_SIGINFO. */
531157445Smarius		tf->tf_out[1] = (register_t)&sfp->sf_si;
53282902Sjake
533157445Smarius		/* Fill in POSIX parts. */
534157445Smarius		sf.sf_si = ksi->ksi_info;
535157445Smarius		sf.sf_si.si_signo = sig; /* maybe a translated signal */
536157445Smarius	} else {
537157445Smarius		/* Old FreeBSD-style arguments. */
538157445Smarius		tf->tf_out[1] = ksi->ksi_code;
539157445Smarius		tf->tf_out[3] = (register_t)ksi->ksi_addr;
540157445Smarius	}
541157445Smarius
54282902Sjake	/* Copy the sigframe out to the user's stack. */
54385242Sjake	if (rwindow_save(td) != 0 || copyout(&sf, sfp, sizeof(*sfp)) != 0 ||
54494254Sjake	    suword(&fp->fr_in[6], tf->tf_out[6]) != 0) {
54582902Sjake		/*
54682902Sjake		 * Something is wrong with the stack pointer.
54782902Sjake		 * ...Kill the process.
54882902Sjake		 */
54983366Sjulian		CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp);
55082902Sjake		PROC_LOCK(p);
55183366Sjulian		sigexit(td, SIGILL);
55282902Sjake		/* NOTREACHED */
55382902Sjake	}
55482902Sjake
555102554Sjake	tf->tf_tpc = (u_long)p->p_md.md_sigtramp;
55682902Sjake	tf->tf_tnpc = tf->tf_tpc + 4;
55785242Sjake	tf->tf_sp = (u_long)fp - SPOFF;
55882902Sjake
55983366Sjulian	CTR3(KTR_SIG, "sendsig: return td=%p pc=%#lx sp=%#lx", td, tf->tf_tpc,
56082902Sjake	    tf->tf_sp);
56184178Sjake
56284178Sjake	PROC_LOCK(p);
563114983Sjhb	mtx_lock(&psp->ps_mtx);
56480708Sjake}
56580708Sjake
56680708Sjake#ifndef	_SYS_SYSPROTO_H_
56783088Sobrienstruct sigreturn_args {
56880708Sjake	ucontext_t *ucp;
56980708Sjake};
57080708Sjake#endif
57180708Sjake
57294606Salc/*
57394606Salc * MPSAFE
57494606Salc */
57580708Sjakeint
57683366Sjuliansigreturn(struct thread *td, struct sigreturn_args *uap)
57780708Sjake{
57883366Sjulian	struct proc *p;
579118768Sjake	mcontext_t *mc;
58082902Sjake	ucontext_t uc;
581118708Sjake	int error;
58282902Sjake
58383366Sjulian	p = td->td_proc;
58483366Sjulian	if (rwindow_save(td)) {
58582902Sjake		PROC_LOCK(p);
58683366Sjulian		sigexit(td, SIGILL);
58782902Sjake	}
58882902Sjake
58983366Sjulian	CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp);
59082902Sjake	if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) {
59183366Sjulian		CTR1(KTR_SIG, "sigreturn: efault td=%p", td);
59282902Sjake		return (EFAULT);
59382902Sjake	}
59482902Sjake
595118768Sjake	mc = &uc.uc_mcontext;
596118768Sjake	error = set_mcontext(td, mc);
597118708Sjake	if (error != 0)
598118708Sjake		return (error);
59982902Sjake
60082902Sjake	PROC_LOCK(p);
601112888Sjeff	td->td_sigmask = uc.uc_sigmask;
602112888Sjeff	SIG_CANTMASK(td->td_sigmask);
603112888Sjeff	signotify(td);
60482902Sjake	PROC_UNLOCK(p);
605105733Sjake
60683366Sjulian	CTR4(KTR_SIG, "sigreturn: return td=%p pc=%#lx sp=%#lx tstate=%#lx",
607118768Sjake	    td, mc->mc_tpc, mc->mc_sp, mc->mc_tstate);
60882902Sjake	return (EJUSTRETURN);
60980708Sjake}
61080708Sjake
611105950Speter#ifdef COMPAT_FREEBSD4
612105950Speterint
613105950Speterfreebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap)
614105950Speter{
615105950Speter
616105950Speter	return sigreturn(td, (struct sigreturn_args *)uap);
617105950Speter}
618105950Speter#endif
619105950Speter
620131905Smarcel/*
621131905Smarcel * Construct a PCB from a trapframe. This is called from kdb_trap() where
622131905Smarcel * we want to start a backtrace from the function that caused us to enter
623131905Smarcel * the debugger. We have the context in the trapframe, but base the trace
624131905Smarcel * on the PCB. The PCB doesn't have to be perfect, as long as it contains
625131905Smarcel * enough for a backtrace.
626131905Smarcel */
627131905Smarcelvoid
628131905Smarcelmakectx(struct trapframe *tf, struct pcb *pcb)
629131905Smarcel{
630131905Smarcel
631131905Smarcel	pcb->pcb_pc = tf->tf_tpc;
632131905Smarcel	pcb->pcb_sp = tf->tf_sp;
633131905Smarcel}
634131905Smarcel
635106977Sdeischenint
636122364Smarcelget_mcontext(struct thread *td, mcontext_t *mc, int flags)
637106977Sdeischen{
638112924Sjake	struct trapframe *tf;
639112924Sjake	struct pcb *pcb;
640106977Sdeischen
641112924Sjake	tf = td->td_frame;
642112924Sjake	pcb = td->td_pcb;
643112924Sjake	bcopy(tf, mc, sizeof(*tf));
644122364Smarcel	if (flags & GET_MC_CLEAR_RET) {
645113998Sdeischen		mc->mc_out[0] = 0;
646113998Sdeischen		mc->mc_out[1] = 0;
647113998Sdeischen	}
648112961Sjake	mc->mc_flags = _MC_VERSION;
649112924Sjake	critical_enter();
650112961Sjake	if ((tf->tf_fprs & FPRS_FEF) != 0) {
651112961Sjake		savefpctx(pcb->pcb_ufp);
652112961Sjake		tf->tf_fprs &= ~FPRS_FEF;
653112961Sjake		pcb->pcb_flags |= PCB_FEF;
654112961Sjake	}
655112961Sjake	if ((pcb->pcb_flags & PCB_FEF) != 0) {
656113018Sjake		bcopy(pcb->pcb_ufp, mc->mc_fp, sizeof(mc->mc_fp));
657112924Sjake		mc->mc_fprs |= FPRS_FEF;
658112924Sjake	}
659112924Sjake	critical_exit();
660112924Sjake	return (0);
661106977Sdeischen}
662106977Sdeischen
663106977Sdeischenint
664112924Sjakeset_mcontext(struct thread *td, const mcontext_t *mc)
665106977Sdeischen{
666112924Sjake	struct trapframe *tf;
667112924Sjake	struct pcb *pcb;
668112924Sjake	uint64_t wstate;
669106977Sdeischen
670112961Sjake	if (!TSTATE_SECURE(mc->mc_tstate) ||
671112961Sjake	    (mc->mc_flags & ((1L << _MC_VERSION_BITS) - 1)) != _MC_VERSION)
672112924Sjake		return (EINVAL);
673112924Sjake	tf = td->td_frame;
674112924Sjake	pcb = td->td_pcb;
675136325Skensmith	/* Make sure the windows are spilled first. */
676136325Skensmith	flushw();
677112924Sjake	wstate = tf->tf_wstate;
678112924Sjake	bcopy(mc, tf, sizeof(*tf));
679112924Sjake	tf->tf_wstate = wstate;
680112924Sjake	if ((mc->mc_fprs & FPRS_FEF) != 0) {
681112924Sjake		tf->tf_fprs = 0;
682113018Sjake		bcopy(mc->mc_fp, pcb->pcb_ufp, sizeof(pcb->pcb_ufp));
683112924Sjake		pcb->pcb_flags |= PCB_FEF;
684112924Sjake	}
685112924Sjake	return (0);
686106977Sdeischen}
687106977Sdeischen
68886147Stmm/*
68992205Sjake * Exit the kernel and execute a firmware call that will not return, as
69092205Sjake * specified by the arguments.
69192205Sjake */
69292205Sjakevoid
69392205Sjakecpu_shutdown(void *args)
69492205Sjake{
69592205Sjake
69692205Sjake#ifdef SMP
69792205Sjake	cpu_mp_shutdown();
69892205Sjake#endif
69992205Sjake	openfirmware_exit(args);
70092205Sjake}
70192205Sjake
702141237Snjl/* Get current clock frequency for the given cpu id. */
703141237Snjlint
704141237Snjlcpu_est_clockrate(int cpu_id, uint64_t *rate)
705141237Snjl{
706141237Snjl
707141237Snjl	return (ENXIO);
708141237Snjl}
709141237Snjl
71092205Sjake/*
71186147Stmm * Duplicate OF_exit() with a different firmware call function that restores
71286147Stmm * the trap table, otherwise a RED state exception is triggered in at least
71386147Stmm * some firmware versions.
71486147Stmm */
71580708Sjakevoid
71680708Sjakecpu_halt(void)
71780708Sjake{
71886147Stmm	static struct {
71986147Stmm		cell_t name;
72086147Stmm		cell_t nargs;
72186147Stmm		cell_t nreturns;
72286147Stmm	} args = {
72386147Stmm		(cell_t)"exit",
72486147Stmm		0,
72586147Stmm		0
72686147Stmm	};
72784178Sjake
72892205Sjake	cpu_shutdown(&args);
72980708Sjake}
73080708Sjake
73186147Stmmvoid
73286147Stmmsparc64_shutdown_final(void *dummy, int howto)
73386147Stmm{
73486147Stmm	static struct {
73586147Stmm		cell_t name;
73686147Stmm		cell_t nargs;
73786147Stmm		cell_t nreturns;
73886147Stmm	} args = {
73986147Stmm		(cell_t)"SUNW,power-off",
74086147Stmm		0,
74186147Stmm		0
74286147Stmm	};
74386147Stmm
74486147Stmm	/* Turn the power off? */
74586147Stmm	if ((howto & RB_POWEROFF) != 0)
74692205Sjake		cpu_shutdown(&args);
74786147Stmm	/* In case of halt, return to the firmware */
74886147Stmm	if ((howto & RB_HALT) != 0)
74986147Stmm		cpu_halt();
75086147Stmm}
75186147Stmm
752121237Spetervoid
753121237Spetercpu_idle(void)
754121237Speter{
755121237Speter	/* Insert code to halt (until next interrupt) for the idle loop */
756121237Speter}
757121237Speter
75880708Sjakeint
75983366Sjulianptrace_set_pc(struct thread *td, u_long addr)
76080708Sjake{
76182016Sjake
76283366Sjulian	td->td_frame->tf_tpc = addr;
76383366Sjulian	td->td_frame->tf_tnpc = addr + 4;
76480708Sjake	return (0);
76580708Sjake}
76680708Sjake
76780708Sjakeint
76883366Sjulianptrace_single_step(struct thread *td)
76980708Sjake{
770104271Sjake	/* TODO; */
77180708Sjake	return (0);
77280708Sjake}
77380708Sjake
774132088Sdavidxuint
775132088Sdavidxuptrace_clear_single_step(struct thread *td)
776132088Sdavidxu{
777132088Sdavidxu	/* TODO; */
778132088Sdavidxu	return (0);
779132088Sdavidxu}
780132088Sdavidxu
78180708Sjakevoid
782102561Sjakeexec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings)
78380708Sjake{
78488639Sjake	struct trapframe *tf;
78581135Stmm	struct pcb *pcb;
786102557Sjake	struct proc *p;
78784178Sjake	u_long sp;
78881135Stmm
78988782Sjake	/* XXX no cpu_exec */
790102557Sjake	p = td->td_proc;
791102557Sjake	p->p_md.md_sigtramp = NULL;
792140485Sjhb	if (p->p_md.md_utrap != NULL) {
793140485Sjhb		utrap_free(p->p_md.md_utrap);
794102557Sjake		p->p_md.md_utrap = NULL;
79588782Sjake	}
79688782Sjake
79783366Sjulian	pcb = td->td_pcb;
798105908Sjake	tf = td->td_frame;
79988639Sjake	sp = rounddown(stack, 16);
80098032Sjake	bzero(pcb, sizeof(*pcb));
80198032Sjake	bzero(tf, sizeof(*tf));
80288639Sjake	tf->tf_out[0] = stack;
803105908Sjake	tf->tf_out[3] = p->p_sysent->sv_psstrings;
80488639Sjake	tf->tf_out[6] = sp - SPOFF - sizeof(struct frame);
80588639Sjake	tf->tf_tnpc = entry + 4;
80688639Sjake	tf->tf_tpc = entry;
80788639Sjake	tf->tf_tstate = TSTATE_IE | TSTATE_PEF | TSTATE_MM_TSO;
80888639Sjake
80988639Sjake	td->td_retval[0] = tf->tf_out[0];
81088639Sjake	td->td_retval[1] = tf->tf_out[1];
81180708Sjake}
81280708Sjake
81380708Sjakeint
81484178Sjakefill_regs(struct thread *td, struct reg *regs)
81580708Sjake{
81680708Sjake
817105733Sjake	bcopy(td->td_frame, regs, sizeof(*regs));
81880708Sjake	return (0);
81980708Sjake}
82080708Sjake
82180708Sjakeint
82284178Sjakeset_regs(struct thread *td, struct reg *regs)
82380708Sjake{
824112922Sjake	struct trapframe *tf;
82580708Sjake
82684178Sjake	if (!TSTATE_SECURE(regs->r_tstate))
82784178Sjake		return (EINVAL);
828112922Sjake	tf = td->td_frame;
829112922Sjake	regs->r_wstate = tf->tf_wstate;
830112922Sjake	bcopy(regs, tf, sizeof(*regs));
83180708Sjake	return (0);
83280708Sjake}
83380708Sjake
83480708Sjakeint
83585294Sdesfill_dbregs(struct thread *td, struct dbreg *dbregs)
83685294Sdes{
83785294Sdes
83885294Sdes	return (ENOSYS);
83985294Sdes}
84085294Sdes
84185294Sdesint
84285294Sdesset_dbregs(struct thread *td, struct dbreg *dbregs)
84385294Sdes{
84485294Sdes
84585294Sdes	return (ENOSYS);
84685294Sdes}
84785294Sdes
84885294Sdesint
84983366Sjulianfill_fpregs(struct thread *td, struct fpreg *fpregs)
85080708Sjake{
85188639Sjake	struct trapframe *tf;
85284178Sjake	struct pcb *pcb;
85384178Sjake
85484178Sjake	pcb = td->td_pcb;
85588639Sjake	tf = td->td_frame;
856112920Sjake	bcopy(pcb->pcb_ufp, fpregs->fr_regs, sizeof(fpregs->fr_regs));
85788639Sjake	fpregs->fr_fsr = tf->tf_fsr;
858105733Sjake	fpregs->fr_gsr = tf->tf_gsr;
85980708Sjake	return (0);
86080708Sjake}
86180708Sjake
86280708Sjakeint
86383366Sjulianset_fpregs(struct thread *td, struct fpreg *fpregs)
86480708Sjake{
86588639Sjake	struct trapframe *tf;
86684178Sjake	struct pcb *pcb;
86784178Sjake
86884178Sjake	pcb = td->td_pcb;
86988639Sjake	tf = td->td_frame;
870112922Sjake	tf->tf_fprs &= ~FPRS_FEF;
871112920Sjake	bcopy(fpregs->fr_regs, pcb->pcb_ufp, sizeof(pcb->pcb_ufp));
87288639Sjake	tf->tf_fsr = fpregs->fr_fsr;
873105733Sjake	tf->tf_gsr = fpregs->fr_gsr;
87480708Sjake	return (0);
87580708Sjake}
876140485Sjhb
877140485Sjhbstruct md_utrap *
878140485Sjhbutrap_alloc(void)
879140485Sjhb{
880140485Sjhb	struct md_utrap *ut;
881140485Sjhb
882140485Sjhb	ut = malloc(sizeof(struct md_utrap), M_SUBPROC, M_WAITOK | M_ZERO);
883140485Sjhb	ut->ut_refcnt = 1;
884140485Sjhb	return (ut);
885140485Sjhb}
886140485Sjhb
887140485Sjhbvoid
888140485Sjhbutrap_free(struct md_utrap *ut)
889140485Sjhb{
890140485Sjhb	int refcnt;
891140485Sjhb
892140485Sjhb	if (ut == NULL)
893140485Sjhb		return;
894140485Sjhb	mtx_pool_lock(mtxpool_sleep, ut);
895140485Sjhb	ut->ut_refcnt--;
896140485Sjhb	refcnt = ut->ut_refcnt;
897140485Sjhb	mtx_pool_unlock(mtxpool_sleep, ut);
898140485Sjhb	if (refcnt == 0)
899140485Sjhb		free(ut, M_SUBPROC);
900140485Sjhb}
901140485Sjhb
902140485Sjhbstruct md_utrap *
903140485Sjhbutrap_hold(struct md_utrap *ut)
904140485Sjhb{
905140485Sjhb
906140485Sjhb	if (ut == NULL)
907140485Sjhb		return (NULL);
908140485Sjhb	mtx_pool_lock(mtxpool_sleep, ut);
909140485Sjhb	ut->ut_refcnt++;
910140485Sjhb	mtx_pool_unlock(mtxpool_sleep, ut);
911140485Sjhb	return (ut);
912140485Sjhb}
913