/*- * Copyright (c) 2001 Takanori Watanabe * Copyright (c) 2001 Mitsuru IWASAKI * 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 __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "acpi_wakecode.h" #ifndef _SYS_CDEFS_H_ #error this file needs sys/cdefs.h as a prerequisite #endif extern uint32_t acpi_reset_video; extern void initializecpu(void); static struct region_descriptor saved_idt, saved_gdt, *p_gdt; static uint16_t saved_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); #ifdef __GNUCLIKE_ASM __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 saved_gdt \n\ sidt saved_idt \n\ sldt saved_ldt \n\ str r_tr \n\ \n\ movl (%esp),%eax \n\ movl %eax,ret_addr \n\ movl $1,%eax \n\ ret \n\ "); #endif /* __GNUCLIKE_ASM */ 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", saved_gdt.rd_limit, saved_gdt.rd_base, saved_idt.rd_limit, saved_idt.rd_base, saved_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 = saved_gdt.rd_limit; p_gdt->rd_base = vtophys(saved_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, saved_gdt); WAKECODE_FIXUP(previous_ldt, uint16_t, saved_ldt); WAKECODE_BCOPY(previous_idt, struct region_descriptor, saved_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); }