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freebsd_amp_hwpstate/sys/i386/acpica/acpi_wakeup.c

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/*-
* 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <vm/vm_page.h>
#include <vm/vm_map.h>
#include <vm/vm_kern.h>
#include <vm/vm_extern.h>
#include <machine/bus.h>
#include <machine/cpufunc.h>
#include <machine/segments.h>
#include <i386/isa/intr_machdep.h>
#include "acpi.h"
#include <dev/acpica/acpivar.h>
#include "acpi_wakecode.h"
extern void initializecpu(void);
struct region_descriptor r_idt, r_gdt, *p_gdt;
static u_int16_t r_ldt;
static u_int32_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 u_int16_t r_cs, r_ds, r_es, r_fs, r_gs, r_ss, r_tr;
static u_int32_t r_esp = 0;
static int debug_wakeup = 1;
SYSCTL_INT(_debug, OID_AUTO, acpi_wakeup, CTLFLAG_RW, &debug_wakeup, 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);
__asm__("
.text
.p2align 2, 0x90
.type acpi_restorecpu, @function
acpi_restorecpu:
.align 4
movl r_eax,%eax
movl r_ebx,%ebx
movl r_ecx,%ecx
movl r_edx,%edx
movl r_ebp,%ebp
movl r_esi,%esi
movl r_edi,%edi
movl r_esp,%esp
pushl r_efl
popfl
pushl ret_addr
xorl %eax,%eax
ret
.text
.p2align 2, 0x90
.type acpi_savecpu, @function
acpi_savecpu:
movw %cs,r_cs
movw %ds,r_ds
movw %es,r_es
movw %fs,r_fs
movw %gs,r_gs
movw %ss,r_ss
movl %eax,r_eax
movl %ebx,r_ebx
movl %ecx,r_ecx
movl %edx,r_edx
movl %ebp,r_ebp
movl %esi,r_esi
movl %edi,r_edi
movl %cr0,%eax
movl %eax,r_cr0
movl %cr2,%eax
movl %eax,r_cr2
movl %cr3,%eax
movl %eax,r_cr3
movl %cr4,%eax
movl %eax,r_cr4
pushfl
popl r_efl
movl %esp,r_esp
sgdt r_gdt
sidt r_idt
sldt r_ldt
str r_tr
movl (%esp),%eax
movl %eax,ret_addr
movl $1,%eax
ret
");
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);
}
int
acpi_sleep_machdep(struct acpi_softc *sc, int state)
{
ACPI_STATUS status;
void **addr;
vm_offset_t oldphys;
struct pmap *pm;
vm_page_t page;
static vm_page_t opage = NULL;
int ret = 0;
u_long ef;
if (sc->acpi_wakeaddr == NULL) {
return (0);
}
AcpiSetFirmwareWakingVector(sc->acpi_wakephys);
ef = read_eflags();
disable_intr();
/* Create Identity Mapping */
pm = &CURPROC->p_vmspace->vm_pmap;
oldphys = pmap_extract(pm, sc->acpi_wakephys);
if (oldphys) {
opage = PHYS_TO_VM_PAGE(oldphys);
}
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;
if (acpi_savecpu()) {
/* Execute Sleep */
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);
addr = (void **)(sc->acpi_wakeaddr + physical_esp);
(u_int32_t *)*addr = vtophys(r_esp);
addr = (void **)(sc->acpi_wakeaddr + previous_cr0);
(u_int32_t *)*addr = r_cr0;
addr = (void **)(sc->acpi_wakeaddr + previous_cr2);
(u_int32_t *)*addr = r_cr2;
addr = (void **)(sc->acpi_wakeaddr + previous_cr3);
(u_int32_t *)*addr = r_cr3;
addr = (void **)(sc->acpi_wakeaddr + previous_cr4);
(u_int32_t *)*addr = r_cr4;
addr = (void **)(sc->acpi_wakeaddr + previous_tr);
(u_int16_t *)*addr = r_tr;
addr = (void **)(sc->acpi_wakeaddr + previous_gdt);
bcopy(&r_gdt, addr, sizeof(r_gdt));
addr = (void **)(sc->acpi_wakeaddr + previous_ldt);
(u_int16_t *)*addr = r_ldt;
addr = (void **)(sc->acpi_wakeaddr + previous_idt);
bcopy(&r_idt, addr, sizeof(r_idt));
addr = (void **)(sc->acpi_wakeaddr + where_to_recover);
*addr = acpi_restorecpu;
addr = (void **)(sc->acpi_wakeaddr + previous_ds);
(u_int16_t *)*addr = r_ds;
addr = (void **)(sc->acpi_wakeaddr + previous_es);
(u_int16_t *)*addr = r_es;
addr = (void **)(sc->acpi_wakeaddr + previous_fs);
(u_int16_t *)*addr = r_fs;
addr = (void **)(sc->acpi_wakeaddr + previous_gs);
(u_int16_t *)*addr = r_gs;
addr = (void **)(sc->acpi_wakeaddr + previous_ss);
(u_int16_t *)*addr = r_ss;
if (debug_wakeup) {
acpi_printcpu();
}
if ((status = AcpiEnterSleepState(state)) != AE_OK) {
device_printf(sc->acpi_dev,
"AcpiEnterSleepState failed - %s\n",
AcpiFormatException(status));
ret = -1;
goto out;
}
wbinvd();
for (;;) ;
} else {
/* Execute Wakeup */
#if 0
initializecpu();
#endif
icu_reinit();
if (debug_wakeup) {
acpi_savecpu();
acpi_printcpu();
}
}
out:
pmap_remove(pm, sc->acpi_wakephys, sc->acpi_wakephys + PAGE_SIZE);
if (opage) {
pmap_enter(pm, sc->acpi_wakephys, page,
VM_PROT_READ | VM_PROT_WRITE, 0);
}
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)
{
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, &acpi_waketag) != 0) {
printf("acpi_alloc_wakeup_handler: unable to create wake tag\n");
return;
}
if (bus_dmamem_alloc(acpi_waketag, (void **)&acpi_wakeaddr,
BUS_DMA_NOWAIT, &acpi_wakemap)) {
printf("acpi_alloc_wakeup_handler: unable to allocate wake memory\n");
return;
}
}
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;
u_int32_t *addr;
addr = (u_int32_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);
}
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