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/*-
* Copyright (c) 2001 Jake Burkholder.
* Copyright (c) 1992 Terrence R. Lambert.
* Copyright (c) 1982, 1987, 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: @(#)machdep.c 7.4 (Berkeley) 6/3/91
* from: FreeBSD: src/sys/i386/i386/machdep.c,v 1.477 2001/08/27
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/sparc64/sparc64/machdep.c 235260 2012-05-11 04:10:23Z attilio $");
#include "opt_compat.h"
#include "opt_ddb.h"
#include "opt_kstack_pages.h"
#include <sys/param.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/bus.h>
#include <sys/cpu.h>
#include <sys/cons.h>
#include <sys/eventhandler.h>
#include <sys/exec.h>
#include <sys/imgact.h>
#include <sys/interrupt.h>
#include <sys/kdb.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
#include <sys/linker.h>
#include <sys/lock.h>
#include <sys/msgbuf.h>
#include <sys/mutex.h>
#include <sys/pcpu.h>
#include <sys/ptrace.h>
#include <sys/reboot.h>
#include <sys/signalvar.h>
#include <sys/smp.h>
#include <sys/syscallsubr.h>
#include <sys/sysent.h>
#include <sys/sysproto.h>
#include <sys/timetc.h>
#include <sys/ucontext.h>
#include <dev/ofw/openfirm.h>
#include <vm/vm.h>
#include <vm/vm_extern.h>
#include <vm/vm_kern.h>
#include <vm/vm_page.h>
#include <vm/vm_map.h>
#include <vm/vm_object.h>
#include <vm/vm_pager.h>
#include <vm/vm_param.h>
#include <ddb/ddb.h>
#include <machine/bus.h>
#include <machine/cache.h>
#include <machine/cmt.h>
#include <machine/cpu.h>
#include <machine/fireplane.h>
#include <machine/fp.h>
#include <machine/fsr.h>
#include <machine/intr_machdep.h>
#include <machine/jbus.h>
#include <machine/md_var.h>
#include <machine/metadata.h>
#include <machine/ofw_machdep.h>
#include <machine/ofw_mem.h>
#include <machine/pcb.h>
#include <machine/pmap.h>
#include <machine/pstate.h>
#include <machine/reg.h>
#include <machine/sigframe.h>
#include <machine/smp.h>
#include <machine/tick.h>
#include <machine/tlb.h>
#include <machine/tstate.h>
#include <machine/upa.h>
#include <machine/ver.h>
typedef int ofw_vec_t(void *);
#ifdef DDB
extern vm_offset_t ksym_start, ksym_end;
#endif
int dtlb_slots;
int itlb_slots;
struct tlb_entry *kernel_tlbs;
int kernel_tlb_slots;
int cold = 1;
long Maxmem;
long realmem;
void *dpcpu0;
char pcpu0[PCPU_PAGES * PAGE_SIZE];
struct trapframe frame0;
vm_offset_t kstack0;
vm_paddr_t kstack0_phys;
struct kva_md_info kmi;
u_long ofw_vec;
u_long ofw_tba;
u_int tba_taken_over;
char sparc64_model[32];
static int cpu_use_vis = 1;
cpu_block_copy_t *cpu_block_copy;
cpu_block_zero_t *cpu_block_zero;
static phandle_t find_bsp(phandle_t node, uint32_t bspid, u_int cpu_impl);
void sparc64_init(caddr_t mdp, u_long o1, u_long o2, u_long o3,
ofw_vec_t *vec);
static void sparc64_shutdown_final(void *dummy, int howto);
static void cpu_startup(void *arg);
SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
CTASSERT((1 << INT_SHIFT) == sizeof(int));
CTASSERT((1 << PTR_SHIFT) == sizeof(char *));
CTASSERT(sizeof(struct reg) == 256);
CTASSERT(sizeof(struct fpreg) == 272);
CTASSERT(sizeof(struct __mcontext) == 512);
CTASSERT((sizeof(struct pcb) & (64 - 1)) == 0);
CTASSERT((offsetof(struct pcb, pcb_kfp) & (64 - 1)) == 0);
CTASSERT((offsetof(struct pcb, pcb_ufp) & (64 - 1)) == 0);
CTASSERT(sizeof(struct pcb) <= ((KSTACK_PAGES * PAGE_SIZE) / 8));
CTASSERT(sizeof(struct pcpu) <= ((PCPU_PAGES * PAGE_SIZE) / 2));
static void
cpu_startup(void *arg)
{
vm_paddr_t physsz;
int i;
physsz = 0;
for (i = 0; i < sparc64_nmemreg; i++)
physsz += sparc64_memreg[i].mr_size;
printf("real memory = %lu (%lu MB)\n", physsz,
physsz / (1024 * 1024));
realmem = (long)physsz / PAGE_SIZE;
vm_ksubmap_init(&kmi);
bufinit();
vm_pager_bufferinit();
EVENTHANDLER_REGISTER(shutdown_final, sparc64_shutdown_final, NULL,
SHUTDOWN_PRI_LAST);
printf("avail memory = %lu (%lu MB)\n", cnt.v_free_count * PAGE_SIZE,
cnt.v_free_count / ((1024 * 1024) / PAGE_SIZE));
if (bootverbose)
printf("machine: %s\n", sparc64_model);
cpu_identify(rdpr(ver), PCPU_GET(clock), curcpu);
/*
* Add BSP as an interrupt target.
*/
intr_add_cpu(0);
}
void
cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
{
struct intr_request *ir;
int i;
pcpu->pc_irtail = &pcpu->pc_irhead;
for (i = 0; i < IR_FREE; i++) {
ir = &pcpu->pc_irpool[i];
ir->ir_next = pcpu->pc_irfree;
pcpu->pc_irfree = ir;
}
}
void
spinlock_enter(void)
{
struct thread *td;
register_t pil;
td = curthread;
if (td->td_md.md_spinlock_count == 0) {
pil = rdpr(pil);
wrpr(pil, 0, PIL_TICK);
td->td_md.md_spinlock_count = 1;
td->td_md.md_saved_pil = pil;
} else
td->td_md.md_spinlock_count++;
critical_enter();
}
void
spinlock_exit(void)
{
struct thread *td;
register_t pil;
td = curthread;
critical_exit();
pil = td->td_md.md_saved_pil;
td->td_md.md_spinlock_count--;
if (td->td_md.md_spinlock_count == 0)
wrpr(pil, pil, 0);
}
static phandle_t
find_bsp(phandle_t node, uint32_t bspid, u_int cpu_impl)
{
char type[sizeof("cpu")];
phandle_t child;
uint32_t cpuid;
for (; node != 0; node = OF_peer(node)) {
child = OF_child(node);
if (child > 0) {
child = find_bsp(child, bspid, cpu_impl);
if (child > 0)
return (child);
} else {
if (OF_getprop(node, "device_type", type,
sizeof(type)) <= 0)
continue;
if (strcmp(type, "cpu") != 0)
continue;
if (OF_getprop(node, cpu_cpuid_prop(cpu_impl), &cpuid,
sizeof(cpuid)) <= 0)
continue;
if (cpuid == bspid)
return (node);
}
}
return (0);
}
const char *
cpu_cpuid_prop(u_int cpu_impl)
{
switch (cpu_impl) {
case CPU_IMPL_SPARC64:
case CPU_IMPL_SPARC64V:
case CPU_IMPL_ULTRASPARCI:
case CPU_IMPL_ULTRASPARCII:
case CPU_IMPL_ULTRASPARCIIi:
case CPU_IMPL_ULTRASPARCIIe:
return ("upa-portid");
case CPU_IMPL_ULTRASPARCIII:
case CPU_IMPL_ULTRASPARCIIIp:
case CPU_IMPL_ULTRASPARCIIIi:
case CPU_IMPL_ULTRASPARCIIIip:
return ("portid");
case CPU_IMPL_ULTRASPARCIV:
case CPU_IMPL_ULTRASPARCIVp:
return ("cpuid");
default:
return ("");
}
}
uint32_t
cpu_get_mid(u_int cpu_impl)
{
switch (cpu_impl) {
case CPU_IMPL_SPARC64:
case CPU_IMPL_SPARC64V:
case CPU_IMPL_ULTRASPARCI:
case CPU_IMPL_ULTRASPARCII:
case CPU_IMPL_ULTRASPARCIIi:
case CPU_IMPL_ULTRASPARCIIe:
return (UPA_CR_GET_MID(ldxa(0, ASI_UPA_CONFIG_REG)));
case CPU_IMPL_ULTRASPARCIII:
case CPU_IMPL_ULTRASPARCIIIp:
return (FIREPLANE_CR_GET_AID(ldxa(AA_FIREPLANE_CONFIG,
ASI_FIREPLANE_CONFIG_REG)));
case CPU_IMPL_ULTRASPARCIIIi:
case CPU_IMPL_ULTRASPARCIIIip:
return (JBUS_CR_GET_JID(ldxa(0, ASI_JBUS_CONFIG_REG)));
case CPU_IMPL_ULTRASPARCIV:
case CPU_IMPL_ULTRASPARCIVp:
return (INTR_ID_GET_ID(ldxa(AA_INTR_ID, ASI_INTR_ID)));
default:
return (0);
}
}
void
sparc64_init(caddr_t mdp, u_long o1, u_long o2, u_long o3, ofw_vec_t *vec)
{
char *env;
struct pcpu *pc;
vm_offset_t end;
vm_offset_t va;
caddr_t kmdp;
phandle_t root;
u_int cpu_impl;
end = 0;
kmdp = NULL;
/*
* Find out what kind of CPU we have first, for anything that changes
* behaviour.
*/
cpu_impl = VER_IMPL(rdpr(ver));
/*
* Do CPU-specific initialization.
*/
if (cpu_impl >= CPU_IMPL_ULTRASPARCIII)
cheetah_init(cpu_impl);
else if (cpu_impl == CPU_IMPL_SPARC64V)
zeus_init(cpu_impl);
/*
* Clear (S)TICK timer (including NPT).
*/
tick_clear(cpu_impl);
/*
* UltraSparc II[e,i] based systems come up with the tick interrupt
* enabled and a handler that resets the tick counter, causing DELAY()
* to not work properly when used early in boot.
* UltraSPARC III based systems come up with the system tick interrupt
* enabled, causing an interrupt storm on startup since they are not
* handled.
*/
tick_stop(cpu_impl);
/*
* Set up Open Firmware entry points.
*/
ofw_tba = rdpr(tba);
ofw_vec = (u_long)vec;
/*
* Parse metadata if present and fetch parameters. Must be before the
* console is inited so cninit() gets the right value of boothowto.
*/
if (mdp != NULL) {
preload_metadata = mdp;
kmdp = preload_search_by_type("elf kernel");
if (kmdp != NULL) {
boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *);
end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
kernel_tlb_slots = MD_FETCH(kmdp, MODINFOMD_DTLB_SLOTS,
int);
kernel_tlbs = (void *)preload_search_info(kmdp,
MODINFO_METADATA | MODINFOMD_DTLB);
}
}
init_param1();
/*
* Initialize Open Firmware (needed for console).
*/
OF_install(OFW_STD_DIRECT, 0);
OF_init(ofw_entry);
/*
* Prime our per-CPU data page for use. Note, we are using it for
* our stack, so don't pass the real size (PAGE_SIZE) to pcpu_init
* or it'll zero it out from under us.
*/
pc = (struct pcpu *)(pcpu0 + (PCPU_PAGES * PAGE_SIZE)) - 1;
pcpu_init(pc, 0, sizeof(struct pcpu));
pc->pc_addr = (vm_offset_t)pcpu0;
pc->pc_impl = cpu_impl;
pc->pc_mid = cpu_get_mid(cpu_impl);
pc->pc_tlb_ctx = TLB_CTX_USER_MIN;
pc->pc_tlb_ctx_min = TLB_CTX_USER_MIN;
pc->pc_tlb_ctx_max = TLB_CTX_USER_MAX;
/*
* Determine the OFW node and frequency of the BSP (and ensure the
* BSP is in the device tree in the first place).
*/
root = OF_peer(0);
pc->pc_node = find_bsp(root, pc->pc_mid, cpu_impl);
if (pc->pc_node == 0)
OF_panic("%s: cannot find boot CPU node", __func__);
if (OF_getprop(pc->pc_node, "clock-frequency", &pc->pc_clock,
sizeof(pc->pc_clock)) <= 0)
OF_panic("%s: cannot determine boot CPU clock", __func__);
/*
* Panic if there is no metadata. Most likely the kernel was booted
* directly, instead of through loader(8).
*/
if (mdp == NULL || kmdp == NULL || end == 0 ||
kernel_tlb_slots == 0 || kernel_tlbs == NULL)
OF_panic("%s: missing loader metadata.\nThis probably means "
"you are not using loader(8).", __func__);
/*
* Work around the broken loader behavior of not demapping no
* longer used kernel TLB slots when unloading the kernel or
* modules.
*/
for (va = KERNBASE + (kernel_tlb_slots - 1) * PAGE_SIZE_4M;
va >= roundup2(end, PAGE_SIZE_4M); va -= PAGE_SIZE_4M) {
if (bootverbose)
OF_printf("demapping unused kernel TLB slot "
"(va %#lx - %#lx)\n", va, va + PAGE_SIZE_4M - 1);
stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_PRIMARY | TLB_DEMAP_PAGE,
ASI_DMMU_DEMAP, 0);
stxa(TLB_DEMAP_VA(va) | TLB_DEMAP_PRIMARY | TLB_DEMAP_PAGE,
ASI_IMMU_DEMAP, 0);
flush(KERNBASE);
kernel_tlb_slots--;
}
/*
* Determine the TLB slot maxima, which are expected to be
* equal across all CPUs.
* NB: for cheetah-class CPUs, these properties only refer
* to the t16s.
*/
if (OF_getprop(pc->pc_node, "#dtlb-entries", &dtlb_slots,
sizeof(dtlb_slots)) == -1)
OF_panic("%s: cannot determine number of dTLB slots",
__func__);
if (OF_getprop(pc->pc_node, "#itlb-entries", &itlb_slots,
sizeof(itlb_slots)) == -1)
OF_panic("%s: cannot determine number of iTLB slots",
__func__);
/*
* Initialize and enable the caches. Note that this may include
* applying workarounds.
*/
cache_init(pc);
cache_enable(cpu_impl);
uma_set_align(pc->pc_cache.dc_linesize - 1);
cpu_block_copy = bcopy;
cpu_block_zero = bzero;
getenv_int("machdep.use_vis", &cpu_use_vis);
if (cpu_use_vis) {
switch (cpu_impl) {
case CPU_IMPL_SPARC64:
case CPU_IMPL_ULTRASPARCI:
case CPU_IMPL_ULTRASPARCII:
case CPU_IMPL_ULTRASPARCIIi:
case CPU_IMPL_ULTRASPARCIIe:
case CPU_IMPL_ULTRASPARCIII: /* NB: we've disabled P$. */
case CPU_IMPL_ULTRASPARCIIIp:
case CPU_IMPL_ULTRASPARCIIIi:
case CPU_IMPL_ULTRASPARCIV:
case CPU_IMPL_ULTRASPARCIVp:
case CPU_IMPL_ULTRASPARCIIIip:
cpu_block_copy = spitfire_block_copy;
cpu_block_zero = spitfire_block_zero;
break;
case CPU_IMPL_SPARC64V:
cpu_block_copy = zeus_block_copy;
cpu_block_zero = zeus_block_zero;
break;
}
}
#ifdef SMP
mp_init(cpu_impl);
#endif
/*
* Initialize virtual memory and calculate physmem.
*/
pmap_bootstrap(cpu_impl);
/*
* Initialize tunables.
*/
init_param2(physmem);
env = getenv("kernelname");
if (env != NULL) {
strlcpy(kernelname, env, sizeof(kernelname));
freeenv(env);
}
/*
* Initialize the interrupt tables.
*/
intr_init1();
/*
* Initialize proc0, set kstack0, frame0, curthread and curpcb.
*/
proc_linkup0(&proc0, &thread0);
proc0.p_md.md_sigtramp = NULL;
proc0.p_md.md_utrap = NULL;
thread0.td_kstack = kstack0;
thread0.td_kstack_pages = KSTACK_PAGES;
thread0.td_pcb = (struct pcb *)
(thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
frame0.tf_tstate = TSTATE_IE | TSTATE_PEF | TSTATE_PRIV;
thread0.td_frame = &frame0;
pc->pc_curthread = &thread0;
pc->pc_curpcb = thread0.td_pcb;
/*
* Initialize global registers.
*/
cpu_setregs(pc);
/*
* Take over the trap table via the PROM. Using the PROM for this
* is necessary in order to set obp-control-relinquished to true
* within the PROM so obtaining /virtual-memory/translations doesn't
* trigger a fatal reset error or worse things further down the road.
* XXX it should be possible to use this solely instead of writing
* %tba in cpu_setregs(). Doing so causes a hang however.
*/
sun4u_set_traptable(tl0_base);
/*
* Initialize the console.
* NB: the low-level console drivers require a working DELAY() and
* some compiler optimizations may cause the curthread accesses of
* mutex(9) to be factored out even if the latter aren't actually
* called, both requiring PCPU_REG to be set.
*/
cninit();
/*
* Initialize the dynamic per-CPU area for the BSP and the message
* buffer (after setting the trap table).
*/
dpcpu_init(dpcpu0, 0);
msgbufinit(msgbufp, msgbufsize);
/*
* Initialize mutexes.
*/
mutex_init();
/*
* Finish the interrupt initialization now that mutexes work and
* enable them.
*/
intr_init2();
wrpr(pil, 0, 0);
wrpr(pstate, 0, PSTATE_KERNEL);
OF_getprop(root, "name", sparc64_model, sizeof(sparc64_model) - 1);
kdb_init();
#ifdef KDB
if (boothowto & RB_KDB)
kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
#endif
}
void
sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
{
struct trapframe *tf;
struct sigframe *sfp;
struct sigacts *psp;
struct sigframe sf;
struct thread *td;
struct frame *fp;
struct proc *p;
u_long sp;
int oonstack;
int sig;
oonstack = 0;
td = curthread;
p = td->td_proc;
PROC_LOCK_ASSERT(p, MA_OWNED);
sig = ksi->ksi_signo;
psp = p->p_sigacts;
mtx_assert(&psp->ps_mtx, MA_OWNED);
tf = td->td_frame;
sp = tf->tf_sp + SPOFF;
oonstack = sigonstack(sp);
CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
catcher, sig);
/* Make sure we have a signal trampoline to return to. */
if (p->p_md.md_sigtramp == NULL) {
/*
* No signal trampoline... kill the process.
*/
CTR0(KTR_SIG, "sendsig: no sigtramp");
printf("sendsig: %s is too old, rebuild it\n", p->p_comm);
sigexit(td, sig);
/* NOTREACHED */
}
/* Save user context. */
bzero(&sf, sizeof(sf));
get_mcontext(td, &sf.sf_uc.uc_mcontext, 0);
sf.sf_uc.uc_sigmask = *mask;
sf.sf_uc.uc_stack = td->td_sigstk;
sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) ?
((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE;
/* Allocate and validate space for the signal handler context. */
if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&
SIGISMEMBER(psp->ps_sigonstack, sig)) {
sfp = (struct sigframe *)(td->td_sigstk.ss_sp +
td->td_sigstk.ss_size - sizeof(struct sigframe));
} else
sfp = (struct sigframe *)sp - 1;
mtx_unlock(&psp->ps_mtx);
PROC_UNLOCK(p);
fp = (struct frame *)sfp - 1;
/* Translate the signal if appropriate. */
if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize)
sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)];
/* Build the argument list for the signal handler. */
tf->tf_out[0] = sig;
tf->tf_out[2] = (register_t)&sfp->sf_uc;
tf->tf_out[4] = (register_t)catcher;
if (SIGISMEMBER(psp->ps_siginfo, sig)) {
/* Signal handler installed with SA_SIGINFO. */
tf->tf_out[1] = (register_t)&sfp->sf_si;
/* Fill in POSIX parts. */
sf.sf_si = ksi->ksi_info;
sf.sf_si.si_signo = sig; /* maybe a translated signal */
} else {
/* Old FreeBSD-style arguments. */
tf->tf_out[1] = ksi->ksi_code;
tf->tf_out[3] = (register_t)ksi->ksi_addr;
}
/* Copy the sigframe out to the user's stack. */
if (rwindow_save(td) != 0 || copyout(&sf, sfp, sizeof(*sfp)) != 0 ||
suword(&fp->fr_in[6], tf->tf_out[6]) != 0) {
/*
* Something is wrong with the stack pointer.
* ...Kill the process.
*/
CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp);
PROC_LOCK(p);
sigexit(td, SIGILL);
/* NOTREACHED */
}
tf->tf_tpc = (u_long)p->p_md.md_sigtramp;
tf->tf_tnpc = tf->tf_tpc + 4;
tf->tf_sp = (u_long)fp - SPOFF;
CTR3(KTR_SIG, "sendsig: return td=%p pc=%#lx sp=%#lx", td, tf->tf_tpc,
tf->tf_sp);
PROC_LOCK(p);
mtx_lock(&psp->ps_mtx);
}
#ifndef _SYS_SYSPROTO_H_
struct sigreturn_args {
ucontext_t *ucp;
};
#endif
/*
* MPSAFE
*/
int
sys_sigreturn(struct thread *td, struct sigreturn_args *uap)
{
struct proc *p;
mcontext_t *mc;
ucontext_t uc;
int error;
p = td->td_proc;
if (rwindow_save(td)) {
PROC_LOCK(p);
sigexit(td, SIGILL);
}
CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp);
if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) {
CTR1(KTR_SIG, "sigreturn: efault td=%p", td);
return (EFAULT);
}
mc = &uc.uc_mcontext;
error = set_mcontext(td, mc);
if (error != 0)
return (error);
kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
CTR4(KTR_SIG, "sigreturn: return td=%p pc=%#lx sp=%#lx tstate=%#lx",
td, mc->mc_tpc, mc->mc_sp, mc->mc_tstate);
return (EJUSTRETURN);
}
/*
* Construct a PCB from a trapframe. This is called from kdb_trap() where
* we want to start a backtrace from the function that caused us to enter
* the debugger. We have the context in the trapframe, but base the trace
* on the PCB. The PCB doesn't have to be perfect, as long as it contains
* enough for a backtrace.
*/
void
makectx(struct trapframe *tf, struct pcb *pcb)
{
pcb->pcb_pc = tf->tf_tpc;
pcb->pcb_sp = tf->tf_sp;
}
int
get_mcontext(struct thread *td, mcontext_t *mc, int flags)
{
struct trapframe *tf;
struct pcb *pcb;
tf = td->td_frame;
pcb = td->td_pcb;
/*
* Copy the registers which will be restored by tl0_ret() from the
* trapframe.
* Note that we skip %g7 which is used as the userland TLS register
* and %wstate.
*/
mc->mc_flags = _MC_VERSION;
mc->mc_global[1] = tf->tf_global[1];
mc->mc_global[2] = tf->tf_global[2];
mc->mc_global[3] = tf->tf_global[3];
mc->mc_global[4] = tf->tf_global[4];
mc->mc_global[5] = tf->tf_global[5];
mc->mc_global[6] = tf->tf_global[6];
if (flags & GET_MC_CLEAR_RET) {
mc->mc_out[0] = 0;
mc->mc_out[1] = 0;
} else {
mc->mc_out[0] = tf->tf_out[0];
mc->mc_out[1] = tf->tf_out[1];
}
mc->mc_out[2] = tf->tf_out[2];
mc->mc_out[3] = tf->tf_out[3];
mc->mc_out[4] = tf->tf_out[4];
mc->mc_out[5] = tf->tf_out[5];
mc->mc_out[6] = tf->tf_out[6];
mc->mc_out[7] = tf->tf_out[7];
mc->mc_fprs = tf->tf_fprs;
mc->mc_fsr = tf->tf_fsr;
mc->mc_gsr = tf->tf_gsr;
mc->mc_tnpc = tf->tf_tnpc;
mc->mc_tpc = tf->tf_tpc;
mc->mc_tstate = tf->tf_tstate;
mc->mc_y = tf->tf_y;
critical_enter();
if ((tf->tf_fprs & FPRS_FEF) != 0) {
savefpctx(pcb->pcb_ufp);
tf->tf_fprs &= ~FPRS_FEF;
pcb->pcb_flags |= PCB_FEF;
}
if ((pcb->pcb_flags & PCB_FEF) != 0) {
bcopy(pcb->pcb_ufp, mc->mc_fp, sizeof(mc->mc_fp));
mc->mc_fprs |= FPRS_FEF;
}
critical_exit();
return (0);
}
int
set_mcontext(struct thread *td, const mcontext_t *mc)
{
struct trapframe *tf;
struct pcb *pcb;
if (!TSTATE_SECURE(mc->mc_tstate) ||
(mc->mc_flags & ((1L << _MC_VERSION_BITS) - 1)) != _MC_VERSION)
return (EINVAL);
tf = td->td_frame;
pcb = td->td_pcb;
/* Make sure the windows are spilled first. */
flushw();
/*
* Copy the registers which will be restored by tl0_ret() to the
* trapframe.
* Note that we skip %g7 which is used as the userland TLS register
* and %wstate.
*/
tf->tf_global[1] = mc->mc_global[1];
tf->tf_global[2] = mc->mc_global[2];
tf->tf_global[3] = mc->mc_global[3];
tf->tf_global[4] = mc->mc_global[4];
tf->tf_global[5] = mc->mc_global[5];
tf->tf_global[6] = mc->mc_global[6];
tf->tf_out[0] = mc->mc_out[0];
tf->tf_out[1] = mc->mc_out[1];
tf->tf_out[2] = mc->mc_out[2];
tf->tf_out[3] = mc->mc_out[3];
tf->tf_out[4] = mc->mc_out[4];
tf->tf_out[5] = mc->mc_out[5];
tf->tf_out[6] = mc->mc_out[6];
tf->tf_out[7] = mc->mc_out[7];
tf->tf_fprs = mc->mc_fprs;
tf->tf_fsr = mc->mc_fsr;
tf->tf_gsr = mc->mc_gsr;
tf->tf_tnpc = mc->mc_tnpc;
tf->tf_tpc = mc->mc_tpc;
tf->tf_tstate = mc->mc_tstate;
tf->tf_y = mc->mc_y;
if ((mc->mc_fprs & FPRS_FEF) != 0) {
tf->tf_fprs = 0;
bcopy(mc->mc_fp, pcb->pcb_ufp, sizeof(pcb->pcb_ufp));
pcb->pcb_flags |= PCB_FEF;
}
return (0);
}
/*
* Exit the kernel and execute a firmware call that will not return, as
* specified by the arguments.
*/
void
cpu_shutdown(void *args)
{
#ifdef SMP
cpu_mp_shutdown();
#endif
ofw_exit(args);
}
/*
* Flush the D-cache for non-DMA I/O so that the I-cache can
* be made coherent later.
*/
void
cpu_flush_dcache(void *ptr, size_t len)
{
/* TBD */
}
/* Get current clock frequency for the given CPU ID. */
int
cpu_est_clockrate(int cpu_id, uint64_t *rate)
{
struct pcpu *pc;
pc = pcpu_find(cpu_id);
if (pc == NULL || rate == NULL)
return (EINVAL);
*rate = pc->pc_clock;
return (0);
}
/*
* Duplicate OF_exit() with a different firmware call function that restores
* the trap table, otherwise a RED state exception is triggered in at least
* some firmware versions.
*/
void
cpu_halt(void)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
} args = {
(cell_t)"exit",
0,
0
};
cpu_shutdown(&args);
}
static void
sparc64_shutdown_final(void *dummy, int howto)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
} args = {
(cell_t)"SUNW,power-off",
0,
0
};
/* Turn the power off? */
if ((howto & RB_POWEROFF) != 0)
cpu_shutdown(&args);
/* In case of halt, return to the firmware. */
if ((howto & RB_HALT) != 0)
cpu_halt();
}
void
cpu_idle(int busy)
{
/* Insert code to halt (until next interrupt) for the idle loop. */
}
int
cpu_idle_wakeup(int cpu)
{
return (1);
}
int
ptrace_set_pc(struct thread *td, u_long addr)
{
td->td_frame->tf_tpc = addr;
td->td_frame->tf_tnpc = addr + 4;
return (0);
}
int
ptrace_single_step(struct thread *td)
{
/* TODO; */
return (0);
}
int
ptrace_clear_single_step(struct thread *td)
{
/* TODO; */
return (0);
}
void
exec_setregs(struct thread *td, struct image_params *imgp, u_long stack)
{
struct trapframe *tf;
struct pcb *pcb;
struct proc *p;
u_long sp;
/* XXX no cpu_exec */
p = td->td_proc;
p->p_md.md_sigtramp = NULL;
if (p->p_md.md_utrap != NULL) {
utrap_free(p->p_md.md_utrap);
p->p_md.md_utrap = NULL;
}
pcb = td->td_pcb;
tf = td->td_frame;
sp = rounddown(stack, 16);
bzero(pcb, sizeof(*pcb));
bzero(tf, sizeof(*tf));
tf->tf_out[0] = stack;
tf->tf_out[3] = p->p_sysent->sv_psstrings;
tf->tf_out[6] = sp - SPOFF - sizeof(struct frame);
tf->tf_tnpc = imgp->entry_addr + 4;
tf->tf_tpc = imgp->entry_addr;
/*
* While we could adhere to the memory model indicated in the ELF
* header, it turns out that just always using TSO performs best.
*/
tf->tf_tstate = TSTATE_IE | TSTATE_PEF | TSTATE_MM_TSO;
td->td_retval[0] = tf->tf_out[0];
td->td_retval[1] = tf->tf_out[1];
}
int
fill_regs(struct thread *td, struct reg *regs)
{
bcopy(td->td_frame, regs, sizeof(*regs));
return (0);
}
int
set_regs(struct thread *td, struct reg *regs)
{
struct trapframe *tf;
if (!TSTATE_SECURE(regs->r_tstate))
return (EINVAL);
tf = td->td_frame;
regs->r_wstate = tf->tf_wstate;
bcopy(regs, tf, sizeof(*regs));
return (0);
}
int
fill_dbregs(struct thread *td, struct dbreg *dbregs)
{
return (ENOSYS);
}
int
set_dbregs(struct thread *td, struct dbreg *dbregs)
{
return (ENOSYS);
}
int
fill_fpregs(struct thread *td, struct fpreg *fpregs)
{
struct trapframe *tf;
struct pcb *pcb;
pcb = td->td_pcb;
tf = td->td_frame;
bcopy(pcb->pcb_ufp, fpregs->fr_regs, sizeof(fpregs->fr_regs));
fpregs->fr_fsr = tf->tf_fsr;
fpregs->fr_gsr = tf->tf_gsr;
return (0);
}
int
set_fpregs(struct thread *td, struct fpreg *fpregs)
{
struct trapframe *tf;
struct pcb *pcb;
pcb = td->td_pcb;
tf = td->td_frame;
tf->tf_fprs &= ~FPRS_FEF;
bcopy(fpregs->fr_regs, pcb->pcb_ufp, sizeof(pcb->pcb_ufp));
tf->tf_fsr = fpregs->fr_fsr;
tf->tf_gsr = fpregs->fr_gsr;
return (0);
}
struct md_utrap *
utrap_alloc(void)
{
struct md_utrap *ut;
ut = malloc(sizeof(struct md_utrap), M_SUBPROC, M_WAITOK | M_ZERO);
ut->ut_refcnt = 1;
return (ut);
}
void
utrap_free(struct md_utrap *ut)
{
int refcnt;
if (ut == NULL)
return;
mtx_pool_lock(mtxpool_sleep, ut);
ut->ut_refcnt--;
refcnt = ut->ut_refcnt;
mtx_pool_unlock(mtxpool_sleep, ut);
if (refcnt == 0)
free(ut, M_SUBPROC);
}
struct md_utrap *
utrap_hold(struct md_utrap *ut)
{
if (ut == NULL)
return (NULL);
mtx_pool_lock(mtxpool_sleep, ut);
ut->ut_refcnt++;
mtx_pool_unlock(mtxpool_sleep, ut);
return (ut);
}