diff options
Diffstat (limited to 'sys/amd64/acpica/acpi_wakeup.c')
| -rw-r--r-- | sys/amd64/acpica/acpi_wakeup.c | 328 |
1 files changed, 328 insertions, 0 deletions
diff --git a/sys/amd64/acpica/acpi_wakeup.c b/sys/amd64/acpica/acpi_wakeup.c new file mode 100644 index 0000000..2b10978 --- /dev/null +++ b/sys/amd64/acpica/acpi_wakeup.c @@ -0,0 +1,328 @@ +/*- + * 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", + acpi_strerror(status)); + ret = -1; + goto out; + } + wbinvd(); + + for (;;) ; + } else { + /* Execute Wakeup */ +#if 0 + initializecpu(); +#endif + icu_reinit(); + + 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); + } + + if (debug_wakeup) { + acpi_savecpu(); + acpi_printcpu(); + } + } + +out: + 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); +} + |
