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acpi_machdep.c revision 1.12 
      1 /* $NetBSD: acpi_machdep.c,v 1.12 2016/01/28 23:50:04 htodd Exp $ */
      2 
      3 /*
      4  * Copyright 2001 Wasabi Systems, Inc.
      5  * All rights reserved.
      6  *
      7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *	This product includes software developed for the NetBSD Project by
     20  *	Wasabi Systems, Inc.
     21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
     22  *    or promote products derived from this software without specific prior
     23  *    written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
     29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     35  * POSSIBILITY OF SUCH DAMAGE.
     36  */
     37 
     38 /*
     39  * Machine-dependent routines for ACPICA.
     40  */
     41 
     42 #include <sys/cdefs.h>
     43 __KERNEL_RCSID(0, "$NetBSD: acpi_machdep.c,v 1.12 2016/01/28 23:50:04 htodd Exp $");
     44 
     45 #include <sys/param.h>
     46 #include <sys/systm.h>
     47 #include <sys/bus.h>
     48 #include <sys/cpu.h>
     49 #include <sys/device.h>
     50 
     51 #include <uvm/uvm_extern.h>
     52 
     53 #include <machine/cpufunc.h>
     54 #include <machine/bootinfo.h>
     55 
     56 #include <dev/acpi/acpica.h>
     57 #include <dev/acpi/acpivar.h>
     58 #include <dev/acpi/acpi_mcfg.h>
     59 
     60 #include <machine/acpi_machdep.h>
     61 #include <machine/mpbiosvar.h>
     62 #include <machine/mpacpi.h>
     63 #include <machine/i82093reg.h>
     64 #include <machine/i82093var.h>
     65 #include <machine/pic.h>
     66 
     67 #include <x86/efi.h>
     68 
     69 #include <dev/pci/pcivar.h>
     70 
     71 #include <dev/isa/isareg.h>
     72 #include <dev/isa/isavar.h>
     73 
     74 #include "ioapic.h"
     75 
     76 #include "acpica.h"
     77 #include "opt_mpbios.h"
     78 #include "opt_acpi.h"
     79 
     80 ACPI_STATUS
     81 acpi_md_OsInitialize(void)
     82 {
     83 	return AE_OK;
     84 }
     85 
     86 ACPI_PHYSICAL_ADDRESS
     87 acpi_md_OsGetRootPointer(void)
     88 {
     89 	ACPI_PHYSICAL_ADDRESS PhysicalAddress;
     90 	ACPI_STATUS Status;
     91 
     92 #ifndef XEN
     93 	/* If EFI is available, attempt to use it to locate the ACPI table. */
     94 	if (efi_probe()) {
     95 		PhysicalAddress = efi_getcfgtblpa(&EFI_UUID_ACPI20);
     96 		if (!PhysicalAddress)
     97 			PhysicalAddress = efi_getcfgtblpa(&EFI_UUID_ACPI10);
     98 		if (PhysicalAddress)
     99 			return PhysicalAddress;
    100 	}
    101 
    102 #endif
    103 	Status = AcpiFindRootPointer(&PhysicalAddress);
    104 	if (ACPI_FAILURE(Status))
    105 		PhysicalAddress = 0;
    106 
    107 	return PhysicalAddress;
    108 }
    109 
    110 struct acpi_md_override {
    111 	int irq;
    112 	int pin;
    113 	int flags;
    114 };
    115 
    116 #if NIOAPIC > 0
    117 static ACPI_STATUS
    118 acpi_md_findoverride(ACPI_SUBTABLE_HEADER *hdrp, void *aux)
    119 {
    120 	ACPI_MADT_INTERRUPT_OVERRIDE *iop;
    121 	struct acpi_md_override *ovrp;
    122 
    123 	if (hdrp->Type != ACPI_MADT_TYPE_INTERRUPT_OVERRIDE) {
    124 		return AE_OK;
    125 	}
    126 
    127 	iop = (void *)hdrp;
    128 	ovrp = aux;
    129 	if (iop->SourceIrq == ovrp->irq) {
    130 		ovrp->pin = iop->GlobalIrq;
    131 		ovrp->flags = iop->IntiFlags;
    132 	}
    133 	return AE_OK;
    134 }
    135 #endif
    136 
    137 ACPI_STATUS
    138 acpi_md_OsInstallInterruptHandler(uint32_t InterruptNumber,
    139     ACPI_OSD_HANDLER ServiceRoutine, void *Context, void **cookiep)
    140 {
    141 	void *ih;
    142 	struct pic *pic;
    143 #if NIOAPIC > 0
    144 	struct ioapic_softc *sc;
    145 	struct acpi_md_override ovr;
    146 	struct mp_intr_map tmpmap, *mip, **mipp = NULL;
    147 #endif
    148 	int irq, pin, type, redir, mpflags;
    149 
    150 	/*
    151 	 * ACPI interrupts default to level-triggered active-low.
    152 	 */
    153 
    154 	type = IST_LEVEL;
    155 	mpflags = (MPS_INTTR_LEVEL << 2) | MPS_INTPO_ACTLO;
    156 	redir = IOAPIC_REDLO_LEVEL | IOAPIC_REDLO_ACTLO;
    157 
    158 #if NIOAPIC > 0
    159 
    160 	/*
    161 	 * Apply any MADT override setting.
    162 	 */
    163 
    164 	ovr.irq = InterruptNumber;
    165 	ovr.pin = -1;
    166 	if (acpi_madt_map() == AE_OK) {
    167 		acpi_madt_walk(acpi_md_findoverride, &ovr);
    168 		acpi_madt_unmap();
    169 	} else {
    170 		aprint_debug("acpi_madt_map() failed, can't check for MADT override\n");
    171 	}
    172 
    173 	if (ovr.pin != -1) {
    174 		bool sci = InterruptNumber == AcpiGbl_FADT.SciInterrupt;
    175 		int polarity = ovr.flags & ACPI_MADT_POLARITY_MASK;
    176 		int trigger = ovr.flags & ACPI_MADT_TRIGGER_MASK;
    177 
    178 		InterruptNumber = ovr.pin;
    179 		if (polarity == ACPI_MADT_POLARITY_ACTIVE_HIGH ||
    180 		    (!sci && polarity == ACPI_MADT_POLARITY_CONFORMS)) {
    181 			mpflags &= ~MPS_INTPO_ACTLO;
    182 			mpflags |= MPS_INTPO_ACTHI;
    183 			redir &= ~IOAPIC_REDLO_ACTLO;
    184 		}
    185 		if (trigger == ACPI_MADT_TRIGGER_EDGE ||
    186 		    (!sci && trigger == ACPI_MADT_TRIGGER_CONFORMS)) {
    187 			type = IST_EDGE;
    188 			mpflags &= ~(MPS_INTTR_LEVEL << 2);
    189 			mpflags |= (MPS_INTTR_EDGE << 2);
    190 			redir &= ~IOAPIC_REDLO_LEVEL;
    191 		}
    192 	}
    193 
    194 	/*
    195 	 * If the interrupt is handled via IOAPIC, update the map.
    196 	 * If the map isn't set up yet, install a temporary one.
    197 	 */
    198 
    199 	sc = ioapic_find_bybase(InterruptNumber);
    200 	if (sc != NULL) {
    201 		pic = &sc->sc_pic;
    202 
    203 		if (pic->pic_type == PIC_IOAPIC) {
    204 			pin = (int)InterruptNumber - pic->pic_vecbase;
    205 			irq = -1;
    206 		} else {
    207 			irq = pin = (int)InterruptNumber;
    208 		}
    209 
    210 		mip = sc->sc_pins[pin].ip_map;
    211 		if (mip) {
    212 			mip->flags &= ~0xf;
    213 			mip->flags |= mpflags;
    214 			mip->redir &= ~(IOAPIC_REDLO_LEVEL |
    215 					IOAPIC_REDLO_ACTLO);
    216 			mip->redir |= redir;
    217 		} else {
    218 			mipp = &sc->sc_pins[pin].ip_map;
    219 			*mipp = &tmpmap;
    220 			tmpmap.redir = redir;
    221 			tmpmap.flags = mpflags;
    222 		}
    223 	} else
    224 #endif
    225 	{
    226 		pic = &i8259_pic;
    227 		irq = pin = (int)InterruptNumber;
    228 	}
    229 
    230 	/*
    231 	 * XXX probably, IPL_BIO is enough.
    232 	 */
    233 	ih = intr_establish(irq, pic, pin, type, IPL_TTY,
    234 	    (int (*)(void *)) ServiceRoutine, Context, false);
    235 
    236 #if NIOAPIC > 0
    237 	if (mipp) {
    238 		*mipp = NULL;
    239 	}
    240 #endif
    241 
    242 	if (ih == NULL)
    243 		return AE_NO_MEMORY;
    244 
    245 	*cookiep = ih;
    246 
    247 	return AE_OK;
    248 }
    249 
    250 void
    251 acpi_md_OsRemoveInterruptHandler(void *cookie)
    252 {
    253 	intr_disestablish(cookie);
    254 }
    255 
    256 ACPI_STATUS
    257 acpi_md_OsMapMemory(ACPI_PHYSICAL_ADDRESS PhysicalAddress,
    258     uint32_t Length, void **LogicalAddress)
    259 {
    260 	int rv;
    261 
    262 	rv = _x86_memio_map(x86_bus_space_mem, PhysicalAddress,
    263 	    Length, 0, (bus_space_handle_t *)LogicalAddress);
    264 
    265 	return (rv != 0) ? AE_NO_MEMORY : AE_OK;
    266 }
    267 
    268 void
    269 acpi_md_OsUnmapMemory(void *LogicalAddress, uint32_t Length)
    270 {
    271 	(void) _x86_memio_unmap(x86_bus_space_mem,
    272 	    (bus_space_handle_t)LogicalAddress, Length, NULL);
    273 }
    274 
    275 ACPI_STATUS
    276 acpi_md_OsGetPhysicalAddress(void *LogicalAddress,
    277     ACPI_PHYSICAL_ADDRESS *PhysicalAddress)
    278 {
    279 	paddr_t pa;
    280 
    281 	if (pmap_extract(pmap_kernel(), (vaddr_t) LogicalAddress, &pa)) {
    282 		*PhysicalAddress = pa;
    283 		return AE_OK;
    284 	}
    285 
    286 	return AE_ERROR;
    287 }
    288 
    289 BOOLEAN
    290 acpi_md_OsReadable(void *Pointer, uint32_t Length)
    291 {
    292 	BOOLEAN rv = TRUE;
    293 	vaddr_t sva, eva;
    294 	pt_entry_t *pte;
    295 
    296 	sva = trunc_page((vaddr_t) Pointer);
    297 	eva = round_page((vaddr_t) Pointer + Length);
    298 
    299 	if (sva < VM_MIN_KERNEL_ADDRESS)
    300 		return FALSE;
    301 
    302 	for (; sva < eva; sva += PAGE_SIZE) {
    303 		pte = kvtopte(sva);
    304 		if ((*pte & PG_V) == 0) {
    305 			rv = FALSE;
    306 			break;
    307 		}
    308 	}
    309 
    310 	return rv;
    311 }
    312 
    313 BOOLEAN
    314 acpi_md_OsWritable(void *Pointer, uint32_t Length)
    315 {
    316 	BOOLEAN rv = TRUE;
    317 	vaddr_t sva, eva;
    318 	pt_entry_t *pte;
    319 
    320 	sva = trunc_page((vaddr_t) Pointer);
    321 	eva = round_page((vaddr_t) Pointer + Length);
    322 
    323 	if (sva < VM_MIN_KERNEL_ADDRESS)
    324 		return FALSE;
    325 
    326 	for (; sva < eva; sva += PAGE_SIZE) {
    327 		pte = kvtopte(sva);
    328 		if ((*pte & (PG_V|PG_W)) != (PG_V|PG_W)) {
    329 			rv = FALSE;
    330 			break;
    331 		}
    332 	}
    333 
    334 	return rv;
    335 }
    336 
    337 void
    338 acpi_md_OsDisableInterrupt(void)
    339 {
    340 	x86_disable_intr();
    341 }
    342 
    343 void
    344 acpi_md_OsEnableInterrupt(void)
    345 {
    346 	x86_enable_intr();
    347 }
    348 
    349 uint32_t
    350 acpi_md_ncpus(void)
    351 {
    352 	return kcpuset_countset(kcpuset_attached);
    353 }
    354 
    355 static bool
    356 acpi_md_mcfg_validate(uint64_t addr, int bus_start, int *bus_end)
    357 {
    358 	struct btinfo_memmap *bim;
    359 	uint64_t size, mapaddr, mapsize;
    360 	uint32_t type;
    361 	int i, n;
    362 
    363 	bim = lookup_bootinfo(BTINFO_MEMMAP);
    364 	if (bim == NULL)
    365 		return false;
    366 
    367 	size = *bus_end - bus_start + 1;
    368 	size *= ACPIMCFG_SIZE_PER_BUS;
    369 	for (i = 0; i < bim->num; i++) {
    370 		mapaddr = bim->entry[i].addr;
    371 		mapsize = bim->entry[i].size;
    372 		type = bim->entry[i].type;
    373 
    374 		aprint_debug("MCFG: MEMMAP: 0x%016" PRIx64 "-0x%016" PRIx64
    375 		    ", size=0x%016" PRIx64 ", type=%d(%s)\n",
    376 		    mapaddr, mapaddr + mapsize - 1, mapsize, type,
    377 		    (type == BIM_Memory) ?  "Memory" :
    378 		    (type == BIM_Reserved) ?  "Reserved" :
    379 		    (type == BIM_ACPI) ? "ACPI" :
    380 		    (type == BIM_NVS) ? "NVS" :
    381 		    "unknown");
    382 
    383 		switch (type) {
    384 		case BIM_ACPI:
    385 		case BIM_Reserved:
    386 			if (addr < mapaddr || addr >= mapaddr + mapsize)
    387 				break;
    388 
    389 			/* full map */
    390 			if (addr + size <= mapaddr + mapsize)
    391 				return true;
    392 
    393 			/* partial map */
    394 			n = (mapsize - (addr - mapaddr)) /
    395 			    ACPIMCFG_SIZE_PER_BUS;
    396 			/* bus_start == bus_end is not allowed. */
    397 			if (n > 1) {
    398 				*bus_end = bus_start + n - 1;
    399 				return true;
    400 			}
    401 			aprint_debug("MCFG: bus %d-%d, address 0x%016" PRIx64
    402 			    ": invalid size: request 0x%016" PRIx64 ", "
    403 			    "actual 0x%016" PRIx64 "\n",
    404 			    bus_start, *bus_end, addr, size, mapsize);
    405 			break;
    406 		}
    407 	}
    408 	aprint_debug("MCFG: bus %d-%d, address 0x%016" PRIx64 ": "
    409 	    "no valid region\n", bus_start, *bus_end, addr);
    410 	return false;
    411 }
    412 
    413 static uint32_t
    414 acpi_md_mcfg_read(bus_space_tag_t bst, bus_space_handle_t bsh, bus_addr_t addr)
    415 {
    416 	vaddr_t va = bsh + addr;
    417 	uint32_t data = (uint32_t) -1;
    418 
    419 	KASSERT(bst == x86_bus_space_mem);
    420 
    421 	__asm("movl %1, %0" : "=a" (data) : "m" (*(volatile uint32_t *)va));
    422 
    423 	return data;
    424 }
    425 
    426 static void
    427 acpi_md_mcfg_write(bus_space_tag_t bst, bus_space_handle_t bsh, bus_addr_t addr,
    428     uint32_t data)
    429 {
    430 	vaddr_t va = bsh + addr;
    431 
    432 	KASSERT(bst == x86_bus_space_mem);
    433 
    434 	__asm("movl %1, %0" : "=m" (*(volatile uint32_t *)va) : "a" (data));
    435 }
    436 
    437 static const struct acpimcfg_ops acpi_md_mcfg_ops = {
    438 	.ao_validate = acpi_md_mcfg_validate,
    439 
    440 	.ao_read = acpi_md_mcfg_read,
    441 	.ao_write = acpi_md_mcfg_write,
    442 };
    443 
    444 void
    445 acpi_md_callback(struct acpi_softc *sc)
    446 {
    447 #ifdef MPBIOS
    448 	if (!mpbios_scanned)
    449 #endif
    450 	mpacpi_find_interrupts(sc);
    451 
    452 #ifndef XEN
    453 	acpi_md_sleep_init();
    454 #endif
    455 
    456 	acpimcfg_init(x86_bus_space_mem, &acpi_md_mcfg_ops);
    457 }
    458