355 lines
8.9 KiB
C
355 lines
8.9 KiB
C
/*-
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* Copyright (c) 2001 Takanori Watanabe <takawata@jp.freebsd.org>
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* Copyright (c) 2001 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/lock.h>
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#include <sys/proc.h>
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#include <sys/sysctl.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <vm/pmap.h>
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#include <vm/vm_object.h>
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#include <vm/vm_page.h>
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#include <vm/vm_map.h>
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#include <vm/vm_kern.h>
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#include <vm/vm_extern.h>
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#include <machine/bus.h>
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#include <machine/cpufunc.h>
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#include <machine/segments.h>
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#include <i386/isa/intr_machdep.h>
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#include "acpi.h"
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#include <dev/acpica/acpica_support.h>
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#include <dev/acpica/acpivar.h>
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#include "acpi_wakecode.h"
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extern void initializecpu(void);
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static struct region_descriptor r_idt, r_gdt, *p_gdt;
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static u_int16_t r_ldt;
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static u_int32_t r_eax, r_ebx, r_ecx, r_edx, r_ebp, r_esi, r_edi,
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r_efl, r_cr0, r_cr2, r_cr3, r_cr4, ret_addr;
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static u_int16_t r_cs, r_ds, r_es, r_fs, r_gs, r_ss, r_tr;
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static u_int32_t r_esp = 0;
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static void acpi_printcpu(void);
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static void acpi_realmodeinst(void *arg, bus_dma_segment_t *segs,
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int nsegs, int error);
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static void acpi_alloc_wakeup_handler(void);
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/* XXX shut gcc up */
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extern int acpi_savecpu(void);
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extern int acpi_restorecpu(void);
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#ifdef __GNUC__
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__asm__(" \n\
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.text \n\
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.p2align 2, 0x90 \n\
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.type acpi_restorecpu, @function\n\
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acpi_restorecpu: \n\
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.align 4 \n\
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movl r_eax,%eax \n\
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movl r_ebx,%ebx \n\
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movl r_ecx,%ecx \n\
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movl r_edx,%edx \n\
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movl r_ebp,%ebp \n\
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movl r_esi,%esi \n\
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movl r_edi,%edi \n\
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movl r_esp,%esp \n\
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\n\
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pushl r_efl \n\
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popfl \n\
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\n\
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movl ret_addr,%eax \n\
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movl %eax,(%esp) \n\
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xorl %eax,%eax \n\
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ret \n\
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\n\
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.text \n\
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.p2align 2, 0x90 \n\
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.type acpi_savecpu, @function \n\
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acpi_savecpu: \n\
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movw %cs,r_cs \n\
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movw %ds,r_ds \n\
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movw %es,r_es \n\
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movw %fs,r_fs \n\
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movw %gs,r_gs \n\
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movw %ss,r_ss \n\
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\n\
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movl %eax,r_eax \n\
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movl %ebx,r_ebx \n\
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movl %ecx,r_ecx \n\
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movl %edx,r_edx \n\
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movl %ebp,r_ebp \n\
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movl %esi,r_esi \n\
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movl %edi,r_edi \n\
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\n\
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movl %cr0,%eax \n\
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movl %eax,r_cr0 \n\
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movl %cr2,%eax \n\
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movl %eax,r_cr2 \n\
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movl %cr3,%eax \n\
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movl %eax,r_cr3 \n\
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movl %cr4,%eax \n\
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movl %eax,r_cr4 \n\
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\n\
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pushfl \n\
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popl r_efl \n\
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\n\
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movl %esp,r_esp \n\
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\n\
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sgdt r_gdt \n\
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sidt r_idt \n\
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sldt r_ldt \n\
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str r_tr \n\
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\n\
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movl (%esp),%eax \n\
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movl %eax,ret_addr \n\
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movl $1,%eax \n\
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ret \n\
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");
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#endif /* __GNUC__ */
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static void
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acpi_printcpu(void)
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{
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printf("======== acpi_printcpu() debug dump ========\n");
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printf("gdt[%04x:%08x] idt[%04x:%08x] ldt[%04x] tr[%04x] efl[%08x]\n",
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r_gdt.rd_limit, r_gdt.rd_base, r_idt.rd_limit, r_idt.rd_base,
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r_ldt, r_tr, r_efl);
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printf("eax[%08x] ebx[%08x] ecx[%08x] edx[%08x]\n",
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r_eax, r_ebx, r_ecx, r_edx);
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printf("esi[%08x] edi[%08x] ebp[%08x] esp[%08x]\n",
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r_esi, r_edi, r_ebp, r_esp);
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printf("cr0[%08x] cr2[%08x] cr3[%08x] cr4[%08x]\n",
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r_cr0, r_cr2, r_cr3, r_cr4);
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printf("cs[%04x] ds[%04x] es[%04x] fs[%04x] gs[%04x] ss[%04x]\n",
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r_cs, r_ds, r_es, r_fs, r_gs, r_ss);
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}
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#define WAKECODE_FIXUP(offset, type, val) do { \
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void **addr; \
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addr = (void **)(sc->acpi_wakeaddr + offset); \
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(type *)*addr = val; \
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} while (0)
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#define WAKECODE_BCOPY(offset, type, val) do { \
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void **addr; \
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addr = (void **)(sc->acpi_wakeaddr + offset); \
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bcopy(&(val), addr, sizeof(type)); \
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} while (0)
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int
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acpi_sleep_machdep(struct acpi_softc *sc, int state)
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{
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ACPI_STATUS status;
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vm_offset_t oldphys;
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struct pmap *pm;
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vm_page_t page;
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static vm_page_t opage = NULL;
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int ret = 0;
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int pteobj_allocated = 0;
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u_long ef;
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struct proc *p;
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if (sc->acpi_wakeaddr == 0) {
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return (0);
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}
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AcpiSetFirmwareWakingVector(sc->acpi_wakephys);
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ef = read_eflags();
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disable_intr();
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/* Create Identity Mapping */
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if ((p = curproc) == NULL)
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p = &proc0;
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pm = vmspace_pmap(p->p_vmspace);
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if (pm->pm_pteobj == NULL) {
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pm->pm_pteobj = vm_object_allocate(OBJT_DEFAULT, PTDPTDI + 1);
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pteobj_allocated = 1;
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}
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oldphys = pmap_extract(pm, sc->acpi_wakephys);
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if (oldphys) {
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opage = PHYS_TO_VM_PAGE(oldphys);
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}
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page = PHYS_TO_VM_PAGE(sc->acpi_wakephys);
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pmap_enter(pm, sc->acpi_wakephys, page,
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VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE, 1);
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ret_addr = 0;
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if (acpi_savecpu()) {
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/* Execute Sleep */
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p_gdt = (struct region_descriptor *)(sc->acpi_wakeaddr + physical_gdt);
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p_gdt->rd_limit = r_gdt.rd_limit;
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p_gdt->rd_base = vtophys(r_gdt.rd_base);
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WAKECODE_FIXUP(physical_esp, u_int32_t, vtophys(r_esp));
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WAKECODE_FIXUP(previous_cr0, u_int32_t, r_cr0);
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WAKECODE_FIXUP(previous_cr2, u_int32_t, r_cr2);
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WAKECODE_FIXUP(previous_cr3, u_int32_t, r_cr3);
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WAKECODE_FIXUP(previous_cr4, u_int32_t, r_cr4);
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WAKECODE_FIXUP(previous_tr, u_int16_t, r_tr);
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WAKECODE_BCOPY(previous_gdt, struct region_descriptor, r_gdt);
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WAKECODE_FIXUP(previous_ldt, u_int16_t, r_ldt);
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WAKECODE_BCOPY(previous_idt, struct region_descriptor, r_idt);
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WAKECODE_FIXUP(where_to_recover, void, acpi_restorecpu);
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WAKECODE_FIXUP(previous_ds, u_int16_t, r_ds);
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WAKECODE_FIXUP(previous_es, u_int16_t, r_es);
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WAKECODE_FIXUP(previous_fs, u_int16_t, r_fs);
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WAKECODE_FIXUP(previous_gs, u_int16_t, r_gs);
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WAKECODE_FIXUP(previous_ss, u_int16_t, r_ss);
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if (acpi_get_verbose(sc)) {
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acpi_printcpu();
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}
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wbinvd();
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if (state == ACPI_STATE_S4 && sc->acpi_s4bios) {
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status = AcpiEnterSleepStateS4Bios();
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} else {
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status = AcpiEnterSleepState(state);
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}
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if (status != AE_OK) {
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device_printf(sc->acpi_dev,
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"AcpiEnterSleepState failed - %s\n",
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AcpiFormatException(status));
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ret = -1;
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goto out;
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}
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for (;;) ;
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} else {
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/* Execute Wakeup */
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#if 0
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initializecpu();
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#endif
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icu_reinit();
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if (acpi_get_verbose(sc)) {
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acpi_savecpu();
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acpi_printcpu();
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}
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}
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out:
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vm_page_lock_queues();
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pmap_remove(pm, sc->acpi_wakephys, sc->acpi_wakephys + PAGE_SIZE);
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vm_page_unlock_queues();
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if (opage) {
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pmap_enter(pm, sc->acpi_wakephys, page,
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VM_PROT_READ | VM_PROT_WRITE, 0);
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}
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if (pteobj_allocated) {
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vm_object_deallocate(pm->pm_pteobj);
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pm->pm_pteobj = NULL;
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}
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write_eflags(ef);
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return (ret);
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}
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static bus_dma_tag_t acpi_waketag;
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static bus_dmamap_t acpi_wakemap;
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static vm_offset_t acpi_wakeaddr = 0;
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static void
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acpi_alloc_wakeup_handler(void)
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{
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if (!cold)
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return;
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if (bus_dma_tag_create(/* parent */ NULL, /* alignment */ 2, 0,
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/* lowaddr below 1MB */ 0x9ffff,
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/* highaddr */ BUS_SPACE_MAXADDR, NULL, NULL,
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PAGE_SIZE, 1, PAGE_SIZE, 0, &acpi_waketag) != 0) {
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printf("acpi_alloc_wakeup_handler: unable to create wake tag\n");
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return;
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}
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if (bus_dmamem_alloc(acpi_waketag, (void **)&acpi_wakeaddr,
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BUS_DMA_NOWAIT, &acpi_wakemap)) {
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printf("acpi_alloc_wakeup_handler: unable to allocate wake memory\n");
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return;
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}
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}
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SYSINIT(acpiwakeup, SI_SUB_KMEM, SI_ORDER_ANY, acpi_alloc_wakeup_handler, 0)
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static void
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acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
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{
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struct acpi_softc *sc = arg;
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u_int32_t *addr;
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addr = (u_int32_t *)&wakecode[wakeup_sw32 + 2];
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*addr = segs[0].ds_addr + wakeup_32;
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bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode));
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sc->acpi_wakephys = segs[0].ds_addr;
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}
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void
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acpi_install_wakeup_handler(struct acpi_softc *sc)
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{
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if (acpi_wakeaddr == 0) {
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return;
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}
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sc->acpi_waketag = acpi_waketag;
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sc->acpi_wakeaddr = acpi_wakeaddr;
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sc->acpi_wakemap = acpi_wakemap;
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bus_dmamap_load(sc->acpi_waketag, sc->acpi_wakemap,
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(void *)sc->acpi_wakeaddr, PAGE_SIZE,
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acpi_realmodeinst, sc, 0);
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}
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