| Current Path : /sys/ia64/ia64/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/ia64/ia64/machdep.c |
/*-
* Copyright (c) 2003,2004 Marcel Moolenaar
* Copyright (c) 2000,2001 Doug Rabson
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/ia64/ia64/machdep.c 232786 2012-03-10 17:47:43Z gavin $");
#include "opt_compat.h"
#include "opt_ddb.h"
#include "opt_kstack_pages.h"
#include "opt_sched.h"
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/bus.h>
#include <sys/cons.h>
#include <sys/cpu.h>
#include <sys/eventhandler.h>
#include <sys/exec.h>
#include <sys/imgact.h>
#include <sys/kdb.h>
#include <sys/kernel.h>
#include <sys/linker.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/msgbuf.h>
#include <sys/pcpu.h>
#include <sys/ptrace.h>
#include <sys/random.h>
#include <sys/reboot.h>
#include <sys/sched.h>
#include <sys/signalvar.h>
#include <sys/syscall.h>
#include <sys/syscallsubr.h>
#include <sys/sysctl.h>
#include <sys/sysproto.h>
#include <sys/ucontext.h>
#include <sys/uio.h>
#include <sys/uuid.h>
#include <sys/vmmeter.h>
#include <sys/vnode.h>
#include <ddb/ddb.h>
#include <net/netisr.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 <machine/bootinfo.h>
#include <machine/cpu.h>
#include <machine/efi.h>
#include <machine/elf.h>
#include <machine/fpu.h>
#include <machine/intr.h>
#include <machine/mca.h>
#include <machine/md_var.h>
#include <machine/pal.h>
#include <machine/pcb.h>
#include <machine/reg.h>
#include <machine/sal.h>
#include <machine/sigframe.h>
#ifdef SMP
#include <machine/smp.h>
#endif
#include <machine/unwind.h>
#include <machine/vmparam.h>
SYSCTL_NODE(_hw, OID_AUTO, freq, CTLFLAG_RD, 0, "");
SYSCTL_NODE(_machdep, OID_AUTO, cpu, CTLFLAG_RD, 0, "");
static u_int bus_freq;
SYSCTL_UINT(_hw_freq, OID_AUTO, bus, CTLFLAG_RD, &bus_freq, 0,
"Bus clock frequency");
static u_int cpu_freq;
SYSCTL_UINT(_hw_freq, OID_AUTO, cpu, CTLFLAG_RD, &cpu_freq, 0,
"CPU clock frequency");
static u_int itc_freq;
SYSCTL_UINT(_hw_freq, OID_AUTO, itc, CTLFLAG_RD, &itc_freq, 0,
"ITC frequency");
int cold = 1;
struct bootinfo *bootinfo;
struct pcpu pcpu0;
extern u_int64_t kernel_text[], _end[];
extern u_int64_t ia64_gateway_page[];
extern u_int64_t break_sigtramp[];
extern u_int64_t epc_sigtramp[];
struct fpswa_iface *fpswa_iface;
vm_size_t ia64_pal_size;
vm_paddr_t ia64_pal_base;
vm_offset_t ia64_port_base;
u_int64_t ia64_lapic_addr = PAL_PIB_DEFAULT_ADDR;
struct ia64_pib *ia64_pib;
static int ia64_sync_icache_needed;
char machine[] = MACHINE;
SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, "");
static char cpu_model[64];
SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD, cpu_model, 0,
"The CPU model name");
static char cpu_family[64];
SYSCTL_STRING(_hw, OID_AUTO, family, CTLFLAG_RD, cpu_family, 0,
"The CPU family name");
#ifdef DDB
extern vm_offset_t ksym_start, ksym_end;
#endif
struct msgbuf *msgbufp = NULL;
/* Other subsystems (e.g., ACPI) can hook this later. */
void (*cpu_idle_hook)(void) = NULL;
long Maxmem = 0;
long realmem = 0;
#define PHYSMAP_SIZE (2 * VM_PHYSSEG_MAX)
vm_paddr_t phys_avail[PHYSMAP_SIZE + 2];
/* must be 2 less so 0 0 can signal end of chunks */
#define PHYS_AVAIL_ARRAY_END ((sizeof(phys_avail) / sizeof(vm_offset_t)) - 2)
struct kva_md_info kmi;
#define Mhz 1000000L
#define Ghz (1000L*Mhz)
static void
identifycpu(void)
{
char vendor[17];
char *family_name, *model_name;
u_int64_t features, tmp;
int number, revision, model, family, archrev;
/*
* Assumes little-endian.
*/
*(u_int64_t *) &vendor[0] = ia64_get_cpuid(0);
*(u_int64_t *) &vendor[8] = ia64_get_cpuid(1);
vendor[16] = '\0';
tmp = ia64_get_cpuid(3);
number = (tmp >> 0) & 0xff;
revision = (tmp >> 8) & 0xff;
model = (tmp >> 16) & 0xff;
family = (tmp >> 24) & 0xff;
archrev = (tmp >> 32) & 0xff;
family_name = model_name = "unknown";
switch (family) {
case 0x07:
family_name = "Itanium";
model_name = "Merced";
break;
case 0x1f:
family_name = "Itanium 2";
switch (model) {
case 0x00:
model_name = "McKinley";
break;
case 0x01:
/*
* Deerfield is a low-voltage variant based on the
* Madison core. We need circumstantial evidence
* (i.e. the clock frequency) to identify those.
* Allow for roughly 1% error margin.
*/
if (cpu_freq > 990 && cpu_freq < 1010)
model_name = "Deerfield";
else
model_name = "Madison";
break;
case 0x02:
model_name = "Madison II";
break;
}
break;
case 0x20:
ia64_sync_icache_needed = 1;
family_name = "Itanium 2";
switch (model) {
case 0x00:
model_name = "Montecito";
break;
case 0x01:
model_name = "Montvale";
break;
}
break;
}
snprintf(cpu_family, sizeof(cpu_family), "%s", family_name);
snprintf(cpu_model, sizeof(cpu_model), "%s", model_name);
features = ia64_get_cpuid(4);
printf("CPU: %s (", model_name);
if (cpu_freq)
printf("%u MHz ", cpu_freq);
printf("%s)\n", family_name);
printf(" Origin = \"%s\" Revision = %d\n", vendor, revision);
printf(" Features = 0x%b\n", (u_int32_t) features,
"\020"
"\001LB" /* long branch (brl) instruction. */
"\002SD" /* Spontaneous deferral. */
"\003AO" /* 16-byte atomic operations (ld, st, cmpxchg). */ );
}
static void
cpu_startup(void *dummy)
{
char nodename[16];
struct pcpu *pc;
struct pcpu_stats *pcs;
/*
* Good {morning,afternoon,evening,night}.
*/
identifycpu();
#ifdef PERFMON
perfmon_init();
#endif
printf("real memory = %ld (%ld MB)\n", ia64_ptob(Maxmem),
ia64_ptob(Maxmem) / 1048576);
realmem = Maxmem;
/*
* Display any holes after the first chunk of extended memory.
*/
if (bootverbose) {
int indx;
printf("Physical memory chunk(s):\n");
for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) {
long size1 = phys_avail[indx + 1] - phys_avail[indx];
printf("0x%08lx - 0x%08lx, %ld bytes (%ld pages)\n",
phys_avail[indx], phys_avail[indx + 1] - 1, size1,
size1 >> PAGE_SHIFT);
}
}
vm_ksubmap_init(&kmi);
printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count),
ptoa(cnt.v_free_count) / 1048576);
if (fpswa_iface == NULL)
printf("Warning: no FPSWA package supplied\n");
else
printf("FPSWA Revision = 0x%lx, Entry = %p\n",
(long)fpswa_iface->if_rev, (void *)fpswa_iface->if_fpswa);
/*
* Set up buffers, so they can be used to read disk labels.
*/
bufinit();
vm_pager_bufferinit();
/*
* Traverse the MADT to discover IOSAPIC and Local SAPIC
* information.
*/
ia64_probe_sapics();
ia64_pib = pmap_mapdev(ia64_lapic_addr, sizeof(*ia64_pib));
ia64_mca_init();
/*
* Create sysctl tree for per-CPU information.
*/
STAILQ_FOREACH(pc, &cpuhead, pc_allcpu) {
snprintf(nodename, sizeof(nodename), "%u", pc->pc_cpuid);
sysctl_ctx_init(&pc->pc_md.sysctl_ctx);
pc->pc_md.sysctl_tree = SYSCTL_ADD_NODE(&pc->pc_md.sysctl_ctx,
SYSCTL_STATIC_CHILDREN(_machdep_cpu), OID_AUTO, nodename,
CTLFLAG_RD, NULL, "");
if (pc->pc_md.sysctl_tree == NULL)
continue;
pcs = &pc->pc_md.stats;
SYSCTL_ADD_ULONG(&pc->pc_md.sysctl_ctx,
SYSCTL_CHILDREN(pc->pc_md.sysctl_tree), OID_AUTO,
"nasts", CTLFLAG_RD, &pcs->pcs_nasts,
"Number of IPI_AST interrupts");
SYSCTL_ADD_ULONG(&pc->pc_md.sysctl_ctx,
SYSCTL_CHILDREN(pc->pc_md.sysctl_tree), OID_AUTO,
"nclks", CTLFLAG_RD, &pcs->pcs_nclks,
"Number of clock interrupts");
SYSCTL_ADD_ULONG(&pc->pc_md.sysctl_ctx,
SYSCTL_CHILDREN(pc->pc_md.sysctl_tree), OID_AUTO,
"nextints", CTLFLAG_RD, &pcs->pcs_nextints,
"Number of ExtINT interrupts");
SYSCTL_ADD_ULONG(&pc->pc_md.sysctl_ctx,
SYSCTL_CHILDREN(pc->pc_md.sysctl_tree), OID_AUTO,
"nhardclocks", CTLFLAG_RD, &pcs->pcs_nhardclocks,
"Number of IPI_HARDCLOCK interrupts");
SYSCTL_ADD_ULONG(&pc->pc_md.sysctl_ctx,
SYSCTL_CHILDREN(pc->pc_md.sysctl_tree), OID_AUTO,
"nhighfps", CTLFLAG_RD, &pcs->pcs_nhighfps,
"Number of IPI_HIGH_FP interrupts");
SYSCTL_ADD_ULONG(&pc->pc_md.sysctl_ctx,
SYSCTL_CHILDREN(pc->pc_md.sysctl_tree), OID_AUTO,
"nhwints", CTLFLAG_RD, &pcs->pcs_nhwints,
"Number of hardware (device) interrupts");
SYSCTL_ADD_ULONG(&pc->pc_md.sysctl_ctx,
SYSCTL_CHILDREN(pc->pc_md.sysctl_tree), OID_AUTO,
"npreempts", CTLFLAG_RD, &pcs->pcs_npreempts,
"Number of IPI_PREEMPT interrupts");
SYSCTL_ADD_ULONG(&pc->pc_md.sysctl_ctx,
SYSCTL_CHILDREN(pc->pc_md.sysctl_tree), OID_AUTO,
"nrdvs", CTLFLAG_RD, &pcs->pcs_nrdvs,
"Number of IPI_RENDEZVOUS interrupts");
SYSCTL_ADD_ULONG(&pc->pc_md.sysctl_ctx,
SYSCTL_CHILDREN(pc->pc_md.sysctl_tree), OID_AUTO,
"nstops", CTLFLAG_RD, &pcs->pcs_nstops,
"Number of IPI_STOP interrupts");
SYSCTL_ADD_ULONG(&pc->pc_md.sysctl_ctx,
SYSCTL_CHILDREN(pc->pc_md.sysctl_tree), OID_AUTO,
"nstrays", CTLFLAG_RD, &pcs->pcs_nstrays,
"Number of stray interrupts");
}
}
SYSINIT(cpu_startup, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
void
cpu_flush_dcache(void *ptr, size_t len)
{
vm_offset_t lim, va;
va = (uintptr_t)ptr & ~31;
lim = (uintptr_t)ptr + len;
while (va < lim) {
ia64_fc(va);
va += 32;
}
ia64_srlz_d();
}
/* Get current clock frequency for the given cpu id. */
int
cpu_est_clockrate(int cpu_id, uint64_t *rate)
{
if (pcpu_find(cpu_id) == NULL || rate == NULL)
return (EINVAL);
*rate = (u_long)cpu_freq * 1000000ul;
return (0);
}
void
cpu_halt()
{
efi_reset_system();
}
void
cpu_idle(int busy)
{
register_t ie;
if (!busy) {
critical_enter();
cpu_idleclock();
}
ie = intr_disable();
KASSERT(ie != 0, ("%s called with interrupts disabled\n", __func__));
if (sched_runnable())
ia64_enable_intr();
else if (cpu_idle_hook != NULL) {
(*cpu_idle_hook)();
/* The hook must enable interrupts! */
} else {
ia64_call_pal_static(PAL_HALT_LIGHT, 0, 0, 0);
ia64_enable_intr();
}
if (!busy) {
cpu_activeclock();
critical_exit();
}
}
int
cpu_idle_wakeup(int cpu)
{
return (0);
}
void
cpu_reset()
{
efi_reset_system();
}
void
cpu_switch(struct thread *old, struct thread *new, struct mtx *mtx)
{
struct pcb *oldpcb, *newpcb;
oldpcb = old->td_pcb;
#ifdef COMPAT_FREEBSD32
ia32_savectx(oldpcb);
#endif
if (PCPU_GET(fpcurthread) == old)
old->td_frame->tf_special.psr |= IA64_PSR_DFH;
if (!savectx(oldpcb)) {
newpcb = new->td_pcb;
oldpcb->pcb_current_pmap =
pmap_switch(newpcb->pcb_current_pmap);
atomic_store_rel_ptr(&old->td_lock, mtx);
#if defined(SCHED_ULE) && defined(SMP)
while (atomic_load_acq_ptr(&new->td_lock) == &blocked_lock)
cpu_spinwait();
#endif
PCPU_SET(curthread, new);
#ifdef COMPAT_FREEBSD32
ia32_restorectx(newpcb);
#endif
if (PCPU_GET(fpcurthread) == new)
new->td_frame->tf_special.psr &= ~IA64_PSR_DFH;
restorectx(newpcb);
/* We should not get here. */
panic("cpu_switch: restorectx() returned");
/* NOTREACHED */
}
}
void
cpu_throw(struct thread *old __unused, struct thread *new)
{
struct pcb *newpcb;
newpcb = new->td_pcb;
(void)pmap_switch(newpcb->pcb_current_pmap);
#if defined(SCHED_ULE) && defined(SMP)
while (atomic_load_acq_ptr(&new->td_lock) == &blocked_lock)
cpu_spinwait();
#endif
PCPU_SET(curthread, new);
#ifdef COMPAT_FREEBSD32
ia32_restorectx(newpcb);
#endif
restorectx(newpcb);
/* We should not get here. */
panic("cpu_throw: restorectx() returned");
/* NOTREACHED */
}
void
cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
{
/*
* Set pc_acpi_id to "uninitialized".
* See sys/dev/acpica/acpi_cpu.c
*/
pcpu->pc_acpi_id = 0xffffffff;
}
void
spinlock_enter(void)
{
struct thread *td;
int intr;
td = curthread;
if (td->td_md.md_spinlock_count == 0) {
intr = intr_disable();
td->td_md.md_spinlock_count = 1;
td->td_md.md_saved_intr = intr;
} else
td->td_md.md_spinlock_count++;
critical_enter();
}
void
spinlock_exit(void)
{
struct thread *td;
int intr;
td = curthread;
critical_exit();
intr = td->td_md.md_saved_intr;
td->td_md.md_spinlock_count--;
if (td->td_md.md_spinlock_count == 0)
intr_restore(intr);
}
void
map_vhpt(uintptr_t vhpt)
{
pt_entry_t pte;
uint64_t psr;
pte = PTE_PRESENT | PTE_MA_WB | PTE_ACCESSED | PTE_DIRTY |
PTE_PL_KERN | PTE_AR_RW;
pte |= vhpt & PTE_PPN_MASK;
__asm __volatile("ptr.d %0,%1" :: "r"(vhpt),
"r"(pmap_vhpt_log2size << 2));
__asm __volatile("mov %0=psr" : "=r"(psr));
__asm __volatile("rsm psr.ic|psr.i");
ia64_srlz_i();
ia64_set_ifa(vhpt);
ia64_set_itir(pmap_vhpt_log2size << 2);
ia64_srlz_d();
__asm __volatile("itr.d dtr[%0]=%1" :: "r"(3), "r"(pte));
__asm __volatile("mov psr.l=%0" :: "r" (psr));
ia64_srlz_i();
}
void
map_pal_code(void)
{
pt_entry_t pte;
vm_offset_t va;
vm_size_t sz;
uint64_t psr;
u_int shft;
if (ia64_pal_size == 0)
return;
va = IA64_PHYS_TO_RR7(ia64_pal_base);
sz = ia64_pal_size;
shft = 0;
while (sz > 1) {
shft++;
sz >>= 1;
}
pte = PTE_PRESENT | PTE_MA_WB | PTE_ACCESSED | PTE_DIRTY |
PTE_PL_KERN | PTE_AR_RWX;
pte |= ia64_pal_base & PTE_PPN_MASK;
__asm __volatile("ptr.d %0,%1; ptr.i %0,%1" :: "r"(va), "r"(shft<<2));
__asm __volatile("mov %0=psr" : "=r"(psr));
__asm __volatile("rsm psr.ic|psr.i");
ia64_srlz_i();
ia64_set_ifa(va);
ia64_set_itir(shft << 2);
ia64_srlz_d();
__asm __volatile("itr.d dtr[%0]=%1" :: "r"(4), "r"(pte));
ia64_srlz_d();
__asm __volatile("itr.i itr[%0]=%1" :: "r"(1), "r"(pte));
__asm __volatile("mov psr.l=%0" :: "r" (psr));
ia64_srlz_i();
}
void
map_gateway_page(void)
{
pt_entry_t pte;
uint64_t psr;
pte = PTE_PRESENT | PTE_MA_WB | PTE_ACCESSED | PTE_DIRTY |
PTE_PL_KERN | PTE_AR_X_RX;
pte |= ia64_tpa((uint64_t)ia64_gateway_page) & PTE_PPN_MASK;
__asm __volatile("ptr.d %0,%1; ptr.i %0,%1" ::
"r"(VM_MAXUSER_ADDRESS), "r"(PAGE_SHIFT << 2));
__asm __volatile("mov %0=psr" : "=r"(psr));
__asm __volatile("rsm psr.ic|psr.i");
ia64_srlz_i();
ia64_set_ifa(VM_MAXUSER_ADDRESS);
ia64_set_itir(PAGE_SHIFT << 2);
ia64_srlz_d();
__asm __volatile("itr.d dtr[%0]=%1" :: "r"(5), "r"(pte));
ia64_srlz_d();
__asm __volatile("itr.i itr[%0]=%1" :: "r"(2), "r"(pte));
__asm __volatile("mov psr.l=%0" :: "r" (psr));
ia64_srlz_i();
/* Expose the mapping to userland in ar.k5 */
ia64_set_k5(VM_MAXUSER_ADDRESS);
}
static u_int
freq_ratio(u_long base, u_long ratio)
{
u_long f;
f = (base * (ratio >> 32)) / (ratio & 0xfffffffful);
return ((f + 500000) / 1000000);
}
static void
calculate_frequencies(void)
{
struct ia64_sal_result sal;
struct ia64_pal_result pal;
register_t ie;
ie = intr_disable();
sal = ia64_sal_entry(SAL_FREQ_BASE, 0, 0, 0, 0, 0, 0, 0);
pal = ia64_call_pal_static(PAL_FREQ_RATIOS, 0, 0, 0);
intr_restore(ie);
if (sal.sal_status == 0 && pal.pal_status == 0) {
if (bootverbose) {
printf("Platform clock frequency %ld Hz\n",
sal.sal_result[0]);
printf("Processor ratio %ld/%ld, Bus ratio %ld/%ld, "
"ITC ratio %ld/%ld\n",
pal.pal_result[0] >> 32,
pal.pal_result[0] & ((1L << 32) - 1),
pal.pal_result[1] >> 32,
pal.pal_result[1] & ((1L << 32) - 1),
pal.pal_result[2] >> 32,
pal.pal_result[2] & ((1L << 32) - 1));
}
cpu_freq = freq_ratio(sal.sal_result[0], pal.pal_result[0]);
bus_freq = freq_ratio(sal.sal_result[0], pal.pal_result[1]);
itc_freq = freq_ratio(sal.sal_result[0], pal.pal_result[2]);
}
}
struct ia64_init_return
ia64_init(void)
{
struct ia64_init_return ret;
int phys_avail_cnt;
vm_offset_t kernstart, kernend;
vm_offset_t kernstartpfn, kernendpfn, pfn0, pfn1;
char *p;
struct efi_md *md;
int metadata_missing;
/* NO OUTPUT ALLOWED UNTIL FURTHER NOTICE */
/*
* TODO: Disable interrupts, floating point etc.
* Maybe flush cache and tlb
*/
ia64_set_fpsr(IA64_FPSR_DEFAULT);
/*
* TODO: Get critical system information (if possible, from the
* information provided by the boot program).
*/
/*
* Look for the I/O ports first - we need them for console
* probing.
*/
for (md = efi_md_first(); md != NULL; md = efi_md_next(md)) {
switch (md->md_type) {
case EFI_MD_TYPE_IOPORT:
ia64_port_base = (uintptr_t)pmap_mapdev(md->md_phys,
md->md_pages * EFI_PAGE_SIZE);
break;
case EFI_MD_TYPE_PALCODE:
ia64_pal_size = md->md_pages * EFI_PAGE_SIZE;
ia64_pal_base = md->md_phys;
break;
}
}
metadata_missing = 0;
if (bootinfo->bi_modulep)
preload_metadata = (caddr_t)bootinfo->bi_modulep;
else
metadata_missing = 1;
if (envmode == 0 && bootinfo->bi_envp)
kern_envp = (caddr_t)bootinfo->bi_envp;
else
kern_envp = static_env;
/*
* Look at arguments passed to us and compute boothowto.
*/
boothowto = bootinfo->bi_boothowto;
if (boothowto & RB_VERBOSE)
bootverbose = 1;
/*
* Find the beginning and end of the kernel.
*/
kernstart = trunc_page(kernel_text);
#ifdef DDB
ksym_start = bootinfo->bi_symtab;
ksym_end = bootinfo->bi_esymtab;
kernend = (vm_offset_t)round_page(ksym_end);
#else
kernend = (vm_offset_t)round_page(_end);
#endif
/* But if the bootstrap tells us otherwise, believe it! */
if (bootinfo->bi_kernend)
kernend = round_page(bootinfo->bi_kernend);
/*
* Region 6 is direct mapped UC and region 7 is direct mapped
* WC. The details of this is controlled by the Alt {I,D}TLB
* handlers. Here we just make sure that they have the largest
* possible page size to minimise TLB usage.
*/
ia64_set_rr(IA64_RR_BASE(6), (6 << 8) | (PAGE_SHIFT << 2));
ia64_set_rr(IA64_RR_BASE(7), (7 << 8) | (PAGE_SHIFT << 2));
ia64_srlz_d();
/*
* Wire things up so we can call the firmware.
*/
map_pal_code();
efi_boot_minimal(bootinfo->bi_systab);
ia64_xiv_init();
ia64_sal_init();
calculate_frequencies();
set_cputicker(ia64_get_itc, (u_long)itc_freq * 1000000, 0);
/*
* Setup the PCPU data for the bootstrap processor. It is needed
* by printf(). Also, since printf() has critical sections, we
* need to initialize at least pc_curthread.
*/
pcpup = &pcpu0;
ia64_set_k4((u_int64_t)pcpup);
pcpu_init(pcpup, 0, sizeof(pcpu0));
dpcpu_init((void *)kernend, 0);
PCPU_SET(md.lid, ia64_get_lid());
kernend += DPCPU_SIZE;
PCPU_SET(curthread, &thread0);
/*
* Initialize the console before we print anything out.
*/
cninit();
/* OUTPUT NOW ALLOWED */
if (metadata_missing)
printf("WARNING: loader(8) metadata is missing!\n");
/* Get FPSWA interface */
fpswa_iface = (bootinfo->bi_fpswa == 0) ? NULL :
(struct fpswa_iface *)IA64_PHYS_TO_RR7(bootinfo->bi_fpswa);
/* Init basic tunables, including hz */
init_param1();
p = getenv("kernelname");
if (p != NULL) {
strlcpy(kernelname, p, sizeof(kernelname));
freeenv(p);
}
kernstartpfn = atop(IA64_RR_MASK(kernstart));
kernendpfn = atop(IA64_RR_MASK(kernend));
/*
* Size the memory regions and load phys_avail[] with the results.
*/
/*
* Find out how much memory is available, by looking at
* the memory descriptors.
*/
#ifdef DEBUG_MD
printf("Memory descriptor count: %d\n", mdcount);
#endif
phys_avail_cnt = 0;
for (md = efi_md_first(); md != NULL; md = efi_md_next(md)) {
#ifdef DEBUG_MD
printf("MD %p: type %d pa 0x%lx cnt 0x%lx\n", md,
md->md_type, md->md_phys, md->md_pages);
#endif
pfn0 = ia64_btop(round_page(md->md_phys));
pfn1 = ia64_btop(trunc_page(md->md_phys + md->md_pages * 4096));
if (pfn1 <= pfn0)
continue;
if (md->md_type != EFI_MD_TYPE_FREE)
continue;
/*
* We have a memory descriptor that describes conventional
* memory that is for general use. We must determine if the
* loader has put the kernel in this region.
*/
physmem += (pfn1 - pfn0);
if (pfn0 <= kernendpfn && kernstartpfn <= pfn1) {
/*
* Must compute the location of the kernel
* within the segment.
*/
#ifdef DEBUG_MD
printf("Descriptor %p contains kernel\n", mp);
#endif
if (pfn0 < kernstartpfn) {
/*
* There is a chunk before the kernel.
*/
#ifdef DEBUG_MD
printf("Loading chunk before kernel: "
"0x%lx / 0x%lx\n", pfn0, kernstartpfn);
#endif
phys_avail[phys_avail_cnt] = ia64_ptob(pfn0);
phys_avail[phys_avail_cnt+1] = ia64_ptob(kernstartpfn);
phys_avail_cnt += 2;
}
if (kernendpfn < pfn1) {
/*
* There is a chunk after the kernel.
*/
#ifdef DEBUG_MD
printf("Loading chunk after kernel: "
"0x%lx / 0x%lx\n", kernendpfn, pfn1);
#endif
phys_avail[phys_avail_cnt] = ia64_ptob(kernendpfn);
phys_avail[phys_avail_cnt+1] = ia64_ptob(pfn1);
phys_avail_cnt += 2;
}
} else {
/*
* Just load this cluster as one chunk.
*/
#ifdef DEBUG_MD
printf("Loading descriptor %d: 0x%lx / 0x%lx\n", i,
pfn0, pfn1);
#endif
phys_avail[phys_avail_cnt] = ia64_ptob(pfn0);
phys_avail[phys_avail_cnt+1] = ia64_ptob(pfn1);
phys_avail_cnt += 2;
}
}
phys_avail[phys_avail_cnt] = 0;
Maxmem = physmem;
init_param2(physmem);
/*
* Initialize error message buffer (at end of core).
*/
msgbufp = (struct msgbuf *)pmap_steal_memory(msgbufsize);
msgbufinit(msgbufp, msgbufsize);
proc_linkup0(&proc0, &thread0);
/*
* Init mapping for kernel stack for proc 0
*/
thread0.td_kstack = pmap_steal_memory(KSTACK_PAGES * PAGE_SIZE);
thread0.td_kstack_pages = KSTACK_PAGES;
mutex_init();
/*
* Initialize the rest of proc 0's PCB.
*
* Set the kernel sp, reserving space for an (empty) trapframe,
* and make proc0's trapframe pointer point to it for sanity.
* Initialise proc0's backing store to start after u area.
*/
cpu_thread_alloc(&thread0);
thread0.td_frame->tf_flags = FRAME_SYSCALL;
thread0.td_pcb->pcb_special.sp =
(u_int64_t)thread0.td_frame - 16;
thread0.td_pcb->pcb_special.bspstore = thread0.td_kstack;
/*
* Initialize the virtual memory system.
*/
pmap_bootstrap();
/*
* Initialize debuggers, and break into them if appropriate.
*/
kdb_init();
#ifdef KDB
if (boothowto & RB_KDB)
kdb_enter(KDB_WHY_BOOTFLAGS,
"Boot flags requested debugger\n");
#endif
ia64_set_tpr(0);
ia64_srlz_d();
ret.bspstore = thread0.td_pcb->pcb_special.bspstore;
ret.sp = thread0.td_pcb->pcb_special.sp;
return (ret);
}
uint64_t
ia64_get_hcdp(void)
{
return (bootinfo->bi_hcdp);
}
void
bzero(void *buf, size_t len)
{
caddr_t p = buf;
while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) {
*p++ = 0;
len--;
}
while (len >= sizeof(u_long) * 8) {
*(u_long*) p = 0;
*((u_long*) p + 1) = 0;
*((u_long*) p + 2) = 0;
*((u_long*) p + 3) = 0;
len -= sizeof(u_long) * 8;
*((u_long*) p + 4) = 0;
*((u_long*) p + 5) = 0;
*((u_long*) p + 6) = 0;
*((u_long*) p + 7) = 0;
p += sizeof(u_long) * 8;
}
while (len >= sizeof(u_long)) {
*(u_long*) p = 0;
len -= sizeof(u_long);
p += sizeof(u_long);
}
while (len) {
*p++ = 0;
len--;
}
}
u_int
ia64_itc_freq(void)
{
return (itc_freq);
}
void
DELAY(int n)
{
u_int64_t start, end, now;
sched_pin();
start = ia64_get_itc();
end = start + itc_freq * n;
/* printf("DELAY from 0x%lx to 0x%lx\n", start, end); */
do {
now = ia64_get_itc();
} while (now < end || (now > start && end < start));
sched_unpin();
}
/*
* Send an interrupt (signal) to a process.
*/
void
sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
{
struct proc *p;
struct thread *td;
struct trapframe *tf;
struct sigacts *psp;
struct sigframe sf, *sfp;
u_int64_t sbs, sp;
int oonstack;
int sig;
u_long code;
td = curthread;
p = td->td_proc;
PROC_LOCK_ASSERT(p, MA_OWNED);
sig = ksi->ksi_signo;
code = ksi->ksi_code;
psp = p->p_sigacts;
mtx_assert(&psp->ps_mtx, MA_OWNED);
tf = td->td_frame;
sp = tf->tf_special.sp;
oonstack = sigonstack(sp);
sbs = 0;
/* save user context */
bzero(&sf, sizeof(struct sigframe));
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. Note that if the stack is in P0 space, the
* call to grow() is a nop, and the useracc() check
* will fail if the process has not already allocated
* the space with a `brk'.
*/
if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&
SIGISMEMBER(psp->ps_sigonstack, sig)) {
sbs = (u_int64_t)td->td_sigstk.ss_sp;
sbs = (sbs + 15) & ~15;
sfp = (struct sigframe *)(sbs + td->td_sigstk.ss_size);
#if defined(COMPAT_43)
td->td_sigstk.ss_flags |= SS_ONSTACK;
#endif
} else
sfp = (struct sigframe *)sp;
sfp = (struct sigframe *)((u_int64_t)(sfp - 1) & ~15);
/* Fill in the siginfo structure for POSIX handlers. */
if (SIGISMEMBER(psp->ps_siginfo, sig)) {
sf.sf_si = ksi->ksi_info;
sf.sf_si.si_signo = sig;
/*
* XXX this shouldn't be here after code in trap.c
* is fixed
*/
sf.sf_si.si_addr = (void*)tf->tf_special.ifa;
code = (u_int64_t)&sfp->sf_si;
}
mtx_unlock(&psp->ps_mtx);
PROC_UNLOCK(p);
get_mcontext(td, &sf.sf_uc.uc_mcontext, 0);
/* Copy the frame out to userland. */
if (copyout(&sf, sfp, sizeof(sf)) != 0) {
/*
* Process has trashed its stack; give it an illegal
* instruction to halt it in its tracks.
*/
PROC_LOCK(p);
sigexit(td, SIGILL);
return;
}
if ((tf->tf_flags & FRAME_SYSCALL) == 0) {
tf->tf_special.psr &= ~IA64_PSR_RI;
tf->tf_special.iip = ia64_get_k5() +
((uint64_t)break_sigtramp - (uint64_t)ia64_gateway_page);
} else
tf->tf_special.iip = ia64_get_k5() +
((uint64_t)epc_sigtramp - (uint64_t)ia64_gateway_page);
/*
* Setup the trapframe to return to the signal trampoline. We pass
* information to the trampoline in the following registers:
*
* gp new backing store or NULL
* r8 signal number
* r9 signal code or siginfo pointer
* r10 signal handler (function descriptor)
*/
tf->tf_special.sp = (u_int64_t)sfp - 16;
tf->tf_special.gp = sbs;
tf->tf_special.bspstore = sf.sf_uc.uc_mcontext.mc_special.bspstore;
tf->tf_special.ndirty = 0;
tf->tf_special.rnat = sf.sf_uc.uc_mcontext.mc_special.rnat;
tf->tf_scratch.gr8 = sig;
tf->tf_scratch.gr9 = code;
tf->tf_scratch.gr10 = (u_int64_t)catcher;
PROC_LOCK(p);
mtx_lock(&psp->ps_mtx);
}
/*
* System call to cleanup state after a signal
* has been taken. Reset signal mask and
* stack state from context left by sendsig (above).
* Return to previous pc and psl as specified by
* context left by sendsig. Check carefully to
* make sure that the user has not modified the
* state to gain improper privileges.
*
* MPSAFE
*/
int
sys_sigreturn(struct thread *td,
struct sigreturn_args /* {
ucontext_t *sigcntxp;
} */ *uap)
{
ucontext_t uc;
struct trapframe *tf;
struct pcb *pcb;
tf = td->td_frame;
pcb = td->td_pcb;
/*
* Fetch the entire context structure at once for speed.
* We don't use a normal argument to simplify RSE handling.
*/
if (copyin(uap->sigcntxp, (caddr_t)&uc, sizeof(uc)))
return (EFAULT);
set_mcontext(td, &uc.uc_mcontext);
#if defined(COMPAT_43)
if (sigonstack(tf->tf_special.sp))
td->td_sigstk.ss_flags |= SS_ONSTACK;
else
td->td_sigstk.ss_flags &= ~SS_ONSTACK;
#endif
kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
return (EJUSTRETURN);
}
#ifdef COMPAT_FREEBSD4
int
freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap)
{
return sys_sigreturn(td, (struct sigreturn_args *)uap);
}
#endif
/*
* 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_special = tf->tf_special;
pcb->pcb_special.__spare = ~0UL; /* XXX see unwind.c */
save_callee_saved(&pcb->pcb_preserved);
save_callee_saved_fp(&pcb->pcb_preserved_fp);
}
int
ia64_flush_dirty(struct thread *td, struct _special *r)
{
struct iovec iov;
struct uio uio;
uint64_t bspst, kstk, rnat;
int error, locked;
if (r->ndirty == 0)
return (0);
kstk = td->td_kstack + (r->bspstore & 0x1ffUL);
if (td == curthread) {
__asm __volatile("mov ar.rsc=0;;");
__asm __volatile("mov %0=ar.bspstore" : "=r"(bspst));
/* Make sure we have all the user registers written out. */
if (bspst - kstk < r->ndirty) {
__asm __volatile("flushrs;;");
__asm __volatile("mov %0=ar.bspstore" : "=r"(bspst));
}
__asm __volatile("mov %0=ar.rnat;;" : "=r"(rnat));
__asm __volatile("mov ar.rsc=3");
error = copyout((void*)kstk, (void*)r->bspstore, r->ndirty);
kstk += r->ndirty;
r->rnat = (bspst > kstk && (bspst & 0x1ffL) < (kstk & 0x1ffL))
? *(uint64_t*)(kstk | 0x1f8L) : rnat;
} else {
locked = PROC_LOCKED(td->td_proc);
if (!locked)
PHOLD(td->td_proc);
iov.iov_base = (void*)(uintptr_t)kstk;
iov.iov_len = r->ndirty;
uio.uio_iov = &iov;
uio.uio_iovcnt = 1;
uio.uio_offset = r->bspstore;
uio.uio_resid = r->ndirty;
uio.uio_segflg = UIO_SYSSPACE;
uio.uio_rw = UIO_WRITE;
uio.uio_td = td;
error = proc_rwmem(td->td_proc, &uio);
/*
* XXX proc_rwmem() doesn't currently return ENOSPC,
* so I think it can bogusly return 0. Neither do
* we allow short writes.
*/
if (uio.uio_resid != 0 && error == 0)
error = ENOSPC;
if (!locked)
PRELE(td->td_proc);
}
r->bspstore += r->ndirty;
r->ndirty = 0;
return (error);
}
int
get_mcontext(struct thread *td, mcontext_t *mc, int flags)
{
struct trapframe *tf;
int error;
tf = td->td_frame;
bzero(mc, sizeof(*mc));
mc->mc_special = tf->tf_special;
error = ia64_flush_dirty(td, &mc->mc_special);
if (tf->tf_flags & FRAME_SYSCALL) {
mc->mc_flags |= _MC_FLAGS_SYSCALL_CONTEXT;
mc->mc_scratch = tf->tf_scratch;
if (flags & GET_MC_CLEAR_RET) {
mc->mc_scratch.gr8 = 0;
mc->mc_scratch.gr9 = 0;
mc->mc_scratch.gr10 = 0;
mc->mc_scratch.gr11 = 0;
}
} else {
mc->mc_flags |= _MC_FLAGS_ASYNC_CONTEXT;
mc->mc_scratch = tf->tf_scratch;
mc->mc_scratch_fp = tf->tf_scratch_fp;
/*
* XXX If the thread never used the high FP registers, we
* probably shouldn't waste time saving them.
*/
ia64_highfp_save(td);
mc->mc_flags |= _MC_FLAGS_HIGHFP_VALID;
mc->mc_high_fp = td->td_pcb->pcb_high_fp;
}
save_callee_saved(&mc->mc_preserved);
save_callee_saved_fp(&mc->mc_preserved_fp);
return (error);
}
int
set_mcontext(struct thread *td, const mcontext_t *mc)
{
struct _special s;
struct trapframe *tf;
uint64_t psrmask;
tf = td->td_frame;
KASSERT((tf->tf_special.ndirty & ~PAGE_MASK) == 0,
("Whoa there! We have more than 8KB of dirty registers!"));
s = mc->mc_special;
/*
* Only copy the user mask and the restart instruction bit from
* the new context.
*/
psrmask = IA64_PSR_BE | IA64_PSR_UP | IA64_PSR_AC | IA64_PSR_MFL |
IA64_PSR_MFH | IA64_PSR_RI;
s.psr = (tf->tf_special.psr & ~psrmask) | (s.psr & psrmask);
/* We don't have any dirty registers of the new context. */
s.ndirty = 0;
if (mc->mc_flags & _MC_FLAGS_ASYNC_CONTEXT) {
/*
* We can get an async context passed to us while we
* entered the kernel through a syscall: sigreturn(2)
* takes contexts that could previously be the result of
* a trap or interrupt.
* Hence, we cannot assert that the trapframe is not
* a syscall frame, but we can assert that it's at
* least an expected syscall.
*/
if (tf->tf_flags & FRAME_SYSCALL) {
KASSERT(tf->tf_scratch.gr15 == SYS_sigreturn, ("foo"));
tf->tf_flags &= ~FRAME_SYSCALL;
}
tf->tf_scratch = mc->mc_scratch;
tf->tf_scratch_fp = mc->mc_scratch_fp;
if (mc->mc_flags & _MC_FLAGS_HIGHFP_VALID)
td->td_pcb->pcb_high_fp = mc->mc_high_fp;
} else {
KASSERT((tf->tf_flags & FRAME_SYSCALL) != 0, ("foo"));
if ((mc->mc_flags & _MC_FLAGS_SYSCALL_CONTEXT) == 0) {
s.cfm = tf->tf_special.cfm;
s.iip = tf->tf_special.iip;
tf->tf_scratch.gr15 = 0; /* Clear syscall nr. */
} else
tf->tf_scratch = mc->mc_scratch;
}
tf->tf_special = s;
restore_callee_saved(&mc->mc_preserved);
restore_callee_saved_fp(&mc->mc_preserved_fp);
return (0);
}
/*
* Clear registers on exec.
*/
void
exec_setregs(struct thread *td, struct image_params *imgp, u_long stack)
{
struct trapframe *tf;
uint64_t *ksttop, *kst;
tf = td->td_frame;
ksttop = (uint64_t*)(td->td_kstack + tf->tf_special.ndirty +
(tf->tf_special.bspstore & 0x1ffUL));
/*
* We can ignore up to 8KB of dirty registers by masking off the
* lower 13 bits in exception_restore() or epc_syscall(). This
* should be enough for a couple of years, but if there are more
* than 8KB of dirty registers, we lose track of the bottom of
* the kernel stack. The solution is to copy the active part of
* the kernel stack down 1 page (or 2, but not more than that)
* so that we always have less than 8KB of dirty registers.
*/
KASSERT((tf->tf_special.ndirty & ~PAGE_MASK) == 0,
("Whoa there! We have more than 8KB of dirty registers!"));
bzero(&tf->tf_special, sizeof(tf->tf_special));
if ((tf->tf_flags & FRAME_SYSCALL) == 0) { /* break syscalls. */
bzero(&tf->tf_scratch, sizeof(tf->tf_scratch));
bzero(&tf->tf_scratch_fp, sizeof(tf->tf_scratch_fp));
tf->tf_special.cfm = (1UL<<63) | (3UL<<7) | 3UL;
tf->tf_special.bspstore = IA64_BACKINGSTORE;
/*
* Copy the arguments onto the kernel register stack so that
* they get loaded by the loadrs instruction. Skip over the
* NaT collection points.
*/
kst = ksttop - 1;
if (((uintptr_t)kst & 0x1ff) == 0x1f8)
*kst-- = 0;
*kst-- = 0;
if (((uintptr_t)kst & 0x1ff) == 0x1f8)
*kst-- = 0;
*kst-- = imgp->ps_strings;
if (((uintptr_t)kst & 0x1ff) == 0x1f8)
*kst-- = 0;
*kst = stack;
tf->tf_special.ndirty = (ksttop - kst) << 3;
} else { /* epc syscalls (default). */
tf->tf_special.cfm = (3UL<<62) | (3UL<<7) | 3UL;
tf->tf_special.bspstore = IA64_BACKINGSTORE + 24;
/*
* Write values for out0, out1 and out2 to the user's backing
* store and arrange for them to be restored into the user's
* initial register frame.
* Assumes that (bspstore & 0x1f8) < 0x1e0.
*/
suword((caddr_t)tf->tf_special.bspstore - 24, stack);
suword((caddr_t)tf->tf_special.bspstore - 16, imgp->ps_strings);
suword((caddr_t)tf->tf_special.bspstore - 8, 0);
}
tf->tf_special.iip = imgp->entry_addr;
tf->tf_special.sp = (stack & ~15) - 16;
tf->tf_special.rsc = 0xf;
tf->tf_special.fpsr = IA64_FPSR_DEFAULT;
tf->tf_special.psr = IA64_PSR_IC | IA64_PSR_I | IA64_PSR_IT |
IA64_PSR_DT | IA64_PSR_RT | IA64_PSR_DFH | IA64_PSR_BN |
IA64_PSR_CPL_USER;
}
int
ptrace_set_pc(struct thread *td, unsigned long addr)
{
uint64_t slot;
switch (addr & 0xFUL) {
case 0:
slot = IA64_PSR_RI_0;
break;
case 1:
/* XXX we need to deal with MLX bundles here */
slot = IA64_PSR_RI_1;
break;
case 2:
slot = IA64_PSR_RI_2;
break;
default:
return (EINVAL);
}
td->td_frame->tf_special.iip = addr & ~0x0FULL;
td->td_frame->tf_special.psr =
(td->td_frame->tf_special.psr & ~IA64_PSR_RI) | slot;
return (0);
}
int
ptrace_single_step(struct thread *td)
{
struct trapframe *tf;
/*
* There's no way to set single stepping when we're leaving the
* kernel through the EPC syscall path. The way we solve this is
* by enabling the lower-privilege trap so that we re-enter the
* kernel as soon as the privilege level changes. See trap.c for
* how we proceed from there.
*/
tf = td->td_frame;
if (tf->tf_flags & FRAME_SYSCALL)
tf->tf_special.psr |= IA64_PSR_LP;
else
tf->tf_special.psr |= IA64_PSR_SS;
return (0);
}
int
ptrace_clear_single_step(struct thread *td)
{
struct trapframe *tf;
/*
* Clear any and all status bits we may use to implement single
* stepping.
*/
tf = td->td_frame;
tf->tf_special.psr &= ~IA64_PSR_SS;
tf->tf_special.psr &= ~IA64_PSR_LP;
tf->tf_special.psr &= ~IA64_PSR_TB;
return (0);
}
int
fill_regs(struct thread *td, struct reg *regs)
{
struct trapframe *tf;
tf = td->td_frame;
regs->r_special = tf->tf_special;
regs->r_scratch = tf->tf_scratch;
save_callee_saved(®s->r_preserved);
return (0);
}
int
set_regs(struct thread *td, struct reg *regs)
{
struct trapframe *tf;
int error;
tf = td->td_frame;
error = ia64_flush_dirty(td, &tf->tf_special);
if (!error) {
tf->tf_special = regs->r_special;
tf->tf_special.bspstore += tf->tf_special.ndirty;
tf->tf_special.ndirty = 0;
tf->tf_scratch = regs->r_scratch;
restore_callee_saved(®s->r_preserved);
}
return (error);
}
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 *frame = td->td_frame;
struct pcb *pcb = td->td_pcb;
/* Save the high FP registers. */
ia64_highfp_save(td);
fpregs->fpr_scratch = frame->tf_scratch_fp;
save_callee_saved_fp(&fpregs->fpr_preserved);
fpregs->fpr_high = pcb->pcb_high_fp;
return (0);
}
int
set_fpregs(struct thread *td, struct fpreg *fpregs)
{
struct trapframe *frame = td->td_frame;
struct pcb *pcb = td->td_pcb;
/* Throw away the high FP registers (should be redundant). */
ia64_highfp_drop(td);
frame->tf_scratch_fp = fpregs->fpr_scratch;
restore_callee_saved_fp(&fpregs->fpr_preserved);
pcb->pcb_high_fp = fpregs->fpr_high;
return (0);
}
void
ia64_sync_icache(vm_offset_t va, vm_offset_t sz)
{
vm_offset_t lim;
if (!ia64_sync_icache_needed)
return;
lim = va + sz;
while (va < lim) {
ia64_fc_i(va);
va += 32; /* XXX */
}
ia64_sync_i();
ia64_srlz_i();
}