/*- * 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. * * $FreeBSD$ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "acpi.h" #include #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(); 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); }