FreeBSD-5.3/sys/i386/acpica/acpi_wakeup.c
/*-
* Copyright (c) 2001 Takanori Watanabe <takawata@jp.freebsd.org>
* Copyright (c) 2001 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
* 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: src/sys/i386/acpica/acpi_wakeup.c,v 1.37.2.1 2004/08/23 05:14:18 njl Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/lock.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <vm/vm_map.h>
#include <machine/bus.h>
#include <machine/cpufunc.h>
#include <machine/intr_machdep.h>
#include <machine/segments.h>
#include "acpi.h"
#include <dev/acpica/acpivar.h>
#include "acpi_wakecode.h"
extern uint32_t acpi_reset_video;
extern void initializecpu(void);
static struct region_descriptor r_idt, r_gdt, *p_gdt;
static uint16_t r_ldt;
static uint32_t r_eax, r_ebx, r_ecx, r_edx, r_ebp, r_esi, r_edi,
r_efl, r_cr0, r_cr2, r_cr3, r_cr4, ret_addr;
static uint16_t r_cs, r_ds, r_es, r_fs, r_gs, r_ss, r_tr;
static uint32_t r_esp = 0;
static void acpi_printcpu(void);
static void acpi_realmodeinst(void *arg, bus_dma_segment_t *segs,
int nsegs, int error);
static void acpi_alloc_wakeup_handler(void);
/* XXX shut gcc up */
extern int acpi_savecpu(void);
extern int acpi_restorecpu(void);
#if defined(__GNUC__) || defined(__INTEL_COMPILER)
__asm__(" \n\
.text \n\
.p2align 2, 0x90 \n\
.type acpi_restorecpu, @function\n\
acpi_restorecpu: \n\
.align 4 \n\
movl r_eax,%eax \n\
movl r_ebx,%ebx \n\
movl r_ecx,%ecx \n\
movl r_edx,%edx \n\
movl r_ebp,%ebp \n\
movl r_esi,%esi \n\
movl r_edi,%edi \n\
movl r_esp,%esp \n\
\n\
pushl r_efl \n\
popfl \n\
\n\
movl ret_addr,%eax \n\
movl %eax,(%esp) \n\
xorl %eax,%eax \n\
ret \n\
\n\
.text \n\
.p2align 2, 0x90 \n\
.type acpi_savecpu, @function \n\
acpi_savecpu: \n\
movw %cs,r_cs \n\
movw %ds,r_ds \n\
movw %es,r_es \n\
movw %fs,r_fs \n\
movw %gs,r_gs \n\
movw %ss,r_ss \n\
\n\
movl %eax,r_eax \n\
movl %ebx,r_ebx \n\
movl %ecx,r_ecx \n\
movl %edx,r_edx \n\
movl %ebp,r_ebp \n\
movl %esi,r_esi \n\
movl %edi,r_edi \n\
\n\
movl %cr0,%eax \n\
movl %eax,r_cr0 \n\
movl %cr2,%eax \n\
movl %eax,r_cr2 \n\
movl %cr3,%eax \n\
movl %eax,r_cr3 \n\
movl %cr4,%eax \n\
movl %eax,r_cr4 \n\
\n\
pushfl \n\
popl r_efl \n\
\n\
movl %esp,r_esp \n\
\n\
sgdt r_gdt \n\
sidt r_idt \n\
sldt r_ldt \n\
str r_tr \n\
\n\
movl (%esp),%eax \n\
movl %eax,ret_addr \n\
movl $1,%eax \n\
ret \n\
");
#endif /* __GNUC__ || __INTEL_COMPILER */
static void
acpi_printcpu(void)
{
printf("======== acpi_printcpu() debug dump ========\n");
printf("gdt[%04x:%08x] idt[%04x:%08x] ldt[%04x] tr[%04x] efl[%08x]\n",
r_gdt.rd_limit, r_gdt.rd_base, r_idt.rd_limit, r_idt.rd_base,
r_ldt, r_tr, r_efl);
printf("eax[%08x] ebx[%08x] ecx[%08x] edx[%08x]\n",
r_eax, r_ebx, r_ecx, r_edx);
printf("esi[%08x] edi[%08x] ebp[%08x] esp[%08x]\n",
r_esi, r_edi, r_ebp, r_esp);
printf("cr0[%08x] cr2[%08x] cr3[%08x] cr4[%08x]\n",
r_cr0, r_cr2, r_cr3, r_cr4);
printf("cs[%04x] ds[%04x] es[%04x] fs[%04x] gs[%04x] ss[%04x]\n",
r_cs, r_ds, r_es, r_fs, r_gs, r_ss);
}
#define WAKECODE_FIXUP(offset, type, val) do { \
type *addr; \
addr = (type *)(sc->acpi_wakeaddr + offset); \
*addr = val; \
} while (0)
#define WAKECODE_BCOPY(offset, type, val) do { \
void *addr; \
addr = (void *)(sc->acpi_wakeaddr + offset); \
bcopy(&(val), addr, sizeof(type)); \
} while (0)
int
acpi_sleep_machdep(struct acpi_softc *sc, int state)
{
ACPI_STATUS status;
struct pmap *pm;
vm_page_t page;
int ret;
uint32_t cr3;
u_long ef;
struct proc *p;
ret = 0;
if (sc->acpi_wakeaddr == 0)
return (0);
AcpiSetFirmwareWakingVector(sc->acpi_wakephys);
ef = read_eflags();
/* Create Identity Mapping */
if ((p = curproc) == NULL)
p = &proc0;
pm = vmspace_pmap(p->p_vmspace);
cr3 = rcr3();
#ifdef PAE
load_cr3(vtophys(pm->pm_pdpt));
#else
load_cr3(vtophys(pm->pm_pdir));
#endif
page = PHYS_TO_VM_PAGE(sc->acpi_wakephys);
pmap_enter(pm, sc->acpi_wakephys, page,
VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE, 1);
ret_addr = 0;
ACPI_DISABLE_IRQS();
if (acpi_savecpu()) {
/* Execute Sleep */
intr_suspend();
p_gdt = (struct region_descriptor *)
(sc->acpi_wakeaddr + physical_gdt);
p_gdt->rd_limit = r_gdt.rd_limit;
p_gdt->rd_base = vtophys(r_gdt.rd_base);
WAKECODE_FIXUP(physical_esp, uint32_t, vtophys(r_esp));
WAKECODE_FIXUP(previous_cr0, uint32_t, r_cr0);
WAKECODE_FIXUP(previous_cr2, uint32_t, r_cr2);
WAKECODE_FIXUP(previous_cr3, uint32_t, r_cr3);
WAKECODE_FIXUP(previous_cr4, uint32_t, r_cr4);
WAKECODE_FIXUP(reset_video, uint32_t, acpi_reset_video);
WAKECODE_FIXUP(previous_tr, uint16_t, r_tr);
WAKECODE_BCOPY(previous_gdt, struct region_descriptor, r_gdt);
WAKECODE_FIXUP(previous_ldt, uint16_t, r_ldt);
WAKECODE_BCOPY(previous_idt, struct region_descriptor, r_idt);
WAKECODE_FIXUP(where_to_recover, void *, acpi_restorecpu);
WAKECODE_FIXUP(previous_ds, uint16_t, r_ds);
WAKECODE_FIXUP(previous_es, uint16_t, r_es);
WAKECODE_FIXUP(previous_fs, uint16_t, r_fs);
WAKECODE_FIXUP(previous_gs, uint16_t, r_gs);
WAKECODE_FIXUP(previous_ss, uint16_t, r_ss);
if (bootverbose)
acpi_printcpu();
/* Call ACPICA to enter the desired sleep state */
if (state == ACPI_STATE_S4 && sc->acpi_s4bios)
status = AcpiEnterSleepStateS4bios();
else
status = AcpiEnterSleepState(state);
if (status != AE_OK) {
device_printf(sc->acpi_dev,
"AcpiEnterSleepState failed - %s\n",
AcpiFormatException(status));
ret = -1;
goto out;
}
for (;;) ;
} else {
/* Execute Wakeup */
intr_resume();
if (bootverbose) {
acpi_savecpu();
acpi_printcpu();
}
}
out:
pmap_remove(pm, sc->acpi_wakephys, sc->acpi_wakephys + PAGE_SIZE);
load_cr3(cr3);
write_eflags(ef);
return (ret);
}
static bus_dma_tag_t acpi_waketag;
static bus_dmamap_t acpi_wakemap;
static vm_offset_t acpi_wakeaddr = 0;
static void
acpi_alloc_wakeup_handler(void)
{
void *wakeaddr;
if (!cold)
return;
if (bus_dma_tag_create(/* parent */ NULL, /* alignment */ 2, 0,
/* lowaddr below 1MB */ 0x9ffff,
/* highaddr */ BUS_SPACE_MAXADDR, NULL, NULL,
PAGE_SIZE, 1, PAGE_SIZE, 0, busdma_lock_mutex,
&Giant, &acpi_waketag) != 0) {
printf("acpi_alloc_wakeup_handler: can't create wake tag\n");
return;
}
if (bus_dmamem_alloc(acpi_waketag, &wakeaddr,
BUS_DMA_NOWAIT, &acpi_wakemap)) {
printf("acpi_alloc_wakeup_handler: can't alloc wake memory\n");
return;
}
acpi_wakeaddr = (vm_offset_t)wakeaddr;
}
SYSINIT(acpiwakeup, SI_SUB_KMEM, SI_ORDER_ANY, acpi_alloc_wakeup_handler, 0)
static void
acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
{
struct acpi_softc *sc = arg;
uint32_t *addr;
addr = (uint32_t *)&wakecode[wakeup_sw32 + 2];
*addr = segs[0].ds_addr + wakeup_32;
bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode));
sc->acpi_wakephys = segs[0].ds_addr;
}
void
acpi_install_wakeup_handler(struct acpi_softc *sc)
{
if (acpi_wakeaddr == 0)
return;
sc->acpi_waketag = acpi_waketag;
sc->acpi_wakeaddr = acpi_wakeaddr;
sc->acpi_wakemap = acpi_wakemap;
bus_dmamap_load(sc->acpi_waketag, sc->acpi_wakemap,
(void *)sc->acpi_wakeaddr, PAGE_SIZE,
acpi_realmodeinst, sc, 0);
}