acpi.c
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上传日期:2013-04-10
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文件大小:20k
- /*
- * acpi.c - Architecture-Specific Low-Level ACPI Support
- *
- * Copyright (C) 1999 VA Linux Systems
- * Copyright (C) 1999,2000 Walt Drummond <drummond@valinux.com>
- * Copyright (C) 2000, 2002 Hewlett-Packard Co.
- * David Mosberger-Tang <davidm@hpl.hp.com>
- * Copyright (C) 2000 Intel Corp.
- * Copyright (C) 2000,2001 J.I. Lee <jung-ik.lee@intel.com>
- * Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- */
- #include <linux/config.h>
- #include <linux/init.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/smp.h>
- #include <linux/string.h>
- #include <linux/types.h>
- #include <linux/irq.h>
- #include <linux/acpi.h>
- #include <linux/efi.h>
- #include <asm/io.h>
- #include <asm/iosapic.h>
- #include <asm/machvec.h>
- #include <asm/page.h>
- #include <asm/system.h>
- #define PREFIX "ACPI: "
- asm (".weak iosapic_register_intr");
- asm (".weak iosapic_override_isa_irq");
- asm (".weak iosapic_register_platform_intr");
- asm (".weak iosapic_init");
- asm (".weak iosapic_version");
- void (*pm_idle) (void);
- void (*pm_power_off) (void);
- unsigned char acpi_kbd_controller_present = 1;
- const char *
- acpi_get_sysname (void)
- {
- #ifdef CONFIG_IA64_GENERIC
- unsigned long rsdp_phys;
- struct acpi20_table_rsdp *rsdp;
- struct acpi_table_xsdt *xsdt;
- struct acpi_table_header *hdr;
- rsdp_phys = acpi_find_rsdp();
- if (!rsdp_phys) {
- printk("ACPI 2.0 RSDP not found, default to "dig"n");
- return "dig";
- }
- rsdp = (struct acpi20_table_rsdp *) __va(rsdp_phys);
- if (strncmp(rsdp->signature, RSDP_SIG, sizeof(RSDP_SIG) - 1)) {
- printk("ACPI 2.0 RSDP signature incorrect, default to "dig"n");
- return "dig";
- }
- xsdt = (struct acpi_table_xsdt *) __va(rsdp->xsdt_address);
- hdr = &xsdt->header;
- if (strncmp(hdr->signature, XSDT_SIG, sizeof(XSDT_SIG) - 1)) {
- printk("ACPI 2.0 XSDT signature incorrect, default to "dig"n");
- return "dig";
- }
- if (!strcmp(hdr->oem_id, "HP")) {
- return "hpzx1";
- }
- return "dig";
- #else
- # if defined (CONFIG_IA64_HP_SIM)
- return "hpsim";
- # elif defined (CONFIG_IA64_HP_ZX1)
- return "hpzx1";
- # elif defined (CONFIG_IA64_SGI_SN1)
- return "sn1";
- # elif defined (CONFIG_IA64_SGI_SN2)
- return "sn2";
- # elif defined (CONFIG_IA64_DIG)
- return "dig";
- # elif defined (CONFIG_IA64_HP_ZX1)
- return "hpzx1";
- # else
- # error Unknown platform. Fix acpi.c.
- # endif
- #endif
- }
- #ifdef CONFIG_ACPI
- /**
- * acpi_get_crs - Return the current resource settings for a device
- * obj: A handle for this device
- * buf: A buffer to be populated by this call.
- *
- * Pass a valid handle, typically obtained by walking the namespace and a
- * pointer to an allocated buffer, and this function will fill in the buffer
- * with a list of acpi_resource structures.
- */
- acpi_status
- acpi_get_crs (acpi_handle obj, acpi_buffer *buf)
- {
- acpi_status result;
- buf->length = 0;
- buf->pointer = NULL;
- result = acpi_get_current_resources(obj, buf);
- if (result != AE_BUFFER_OVERFLOW)
- return result;
- buf->pointer = kmalloc(buf->length, GFP_KERNEL);
- if (!buf->pointer)
- return -ENOMEM;
- return acpi_get_current_resources(obj, buf);
- }
- acpi_resource *
- acpi_get_crs_next (acpi_buffer *buf, int *offset)
- {
- acpi_resource *res;
- if (*offset >= buf->length)
- return NULL;
- res = buf->pointer + *offset;
- *offset += res->length;
- return res;
- }
- acpi_resource_data *
- acpi_get_crs_type (acpi_buffer *buf, int *offset, int type)
- {
- for (;;) {
- acpi_resource *res = acpi_get_crs_next(buf, offset);
- if (!res)
- return NULL;
- if (res->id == type)
- return &res->data;
- }
- }
- void
- acpi_dispose_crs (acpi_buffer *buf)
- {
- kfree(buf->pointer);
- }
- static void
- acpi_get_crs_addr (acpi_buffer *buf, int type, u64 *base, u64 *length, u64 *tra)
- {
- int offset = 0;
- acpi_resource_address16 *addr16;
- acpi_resource_address32 *addr32;
- acpi_resource_address64 *addr64;
- for (;;) {
- acpi_resource *res = acpi_get_crs_next(buf, &offset);
- if (!res)
- return;
- switch (res->id) {
- case ACPI_RSTYPE_ADDRESS16:
- addr16 = (acpi_resource_address16 *) &res->data;
- if (type == addr16->resource_type) {
- *base = addr16->min_address_range;
- *length = addr16->address_length;
- *tra = addr16->address_translation_offset;
- return;
- }
- break;
- case ACPI_RSTYPE_ADDRESS32:
- addr32 = (acpi_resource_address32 *) &res->data;
- if (type == addr32->resource_type) {
- *base = addr32->min_address_range;
- *length = addr32->address_length;
- *tra = addr32->address_translation_offset;
- return;
- }
- break;
- case ACPI_RSTYPE_ADDRESS64:
- addr64 = (acpi_resource_address64 *) &res->data;
- if (type == addr64->resource_type) {
- *base = addr64->min_address_range;
- *length = addr64->address_length;
- *tra = addr64->address_translation_offset;
- return;
- }
- break;
- }
- }
- }
- acpi_status
- acpi_get_addr_space(acpi_handle obj, u8 type, u64 *base, u64 *length, u64 *tra)
- {
- acpi_status status;
- acpi_buffer buf;
- *base = 0;
- *length = 0;
- *tra = 0;
- status = acpi_get_crs(obj, &buf);
- if (ACPI_FAILURE(status)) {
- printk(KERN_ERR PREFIX "Unable to get _CRS data on objectn");
- return status;
- }
- acpi_get_crs_addr(&buf, type, base, length, tra);
- acpi_dispose_crs(&buf);
- return AE_OK;
- }
- typedef struct {
- u8 guid_id;
- u8 guid[16];
- u8 csr_base[8];
- u8 csr_length[8];
- } acpi_hp_vendor_long;
- #define HP_CCSR_LENGTH 0x21
- #define HP_CCSR_TYPE 0x2
- #define HP_CCSR_GUID EFI_GUID(0x69e9adf9, 0x924f, 0xab5f,
- 0xf6, 0x4a, 0x24, 0xd2, 0x01, 0x37, 0x0e, 0xad)
- acpi_status
- acpi_hp_csr_space(acpi_handle obj, u64 *csr_base, u64 *csr_length)
- {
- int i, offset = 0;
- acpi_status status;
- acpi_buffer buf;
- acpi_resource_vendor *res;
- acpi_hp_vendor_long *hp_res;
- efi_guid_t vendor_guid;
- *csr_base = 0;
- *csr_length = 0;
- status = acpi_get_crs(obj, &buf);
- if (ACPI_FAILURE(status)) {
- printk(KERN_ERR PREFIX "Unable to get _CRS data on objectn");
- return status;
- }
- res = (acpi_resource_vendor *)acpi_get_crs_type(&buf, &offset, ACPI_RSTYPE_VENDOR);
- if (!res) {
- printk(KERN_ERR PREFIX "Failed to find config space for devicen");
- acpi_dispose_crs(&buf);
- return AE_NOT_FOUND;
- }
- hp_res = (acpi_hp_vendor_long *)(res->reserved);
- if (res->length != HP_CCSR_LENGTH || hp_res->guid_id != HP_CCSR_TYPE) {
- printk(KERN_ERR PREFIX "Unknown Vendor datan");
- acpi_dispose_crs(&buf);
- return AE_TYPE; /* Revisit error? */
- }
- memcpy(&vendor_guid, hp_res->guid, sizeof(efi_guid_t));
- if (efi_guidcmp(vendor_guid, HP_CCSR_GUID) != 0) {
- printk(KERN_ERR PREFIX "Vendor GUID does not matchn");
- acpi_dispose_crs(&buf);
- return AE_TYPE; /* Revisit error? */
- }
- for (i = 0 ; i < 8 ; i++) {
- *csr_base |= ((u64)(hp_res->csr_base[i]) << (i * 8));
- *csr_length |= ((u64)(hp_res->csr_length[i]) << (i * 8));
- }
- acpi_dispose_crs(&buf);
- return AE_OK;
- }
- #endif /* CONFIG_ACPI */
- #ifdef CONFIG_ACPI_BOOT
- #define ACPI_MAX_PLATFORM_INTERRUPTS 256
- /* Array to record platform interrupt vectors for generic interrupt routing. */
- int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = { [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1 };
- enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
- /*
- * Interrupt routing API for device drivers. Provides interrupt vector for
- * a generic platform event. Currently only CPEI is implemented.
- */
- int
- acpi_request_vector (u32 int_type)
- {
- int vector = -1;
- if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
- /* correctable platform error interrupt */
- vector = platform_intr_list[int_type];
- } else
- printk("acpi_request_vector(): invalid interrupt typen");
- return vector;
- }
- char *
- __acpi_map_table (unsigned long phys_addr, unsigned long size)
- {
- return __va(phys_addr);
- }
- /* --------------------------------------------------------------------------
- Boot-time Table Parsing
- -------------------------------------------------------------------------- */
- static int total_cpus __initdata;
- static int available_cpus __initdata;
- struct acpi_table_madt * acpi_madt __initdata;
- static u8 has_8259;
- static int __init
- acpi_parse_lapic_addr_ovr (acpi_table_entry_header *header)
- {
- struct acpi_table_lapic_addr_ovr *lapic;
- lapic = (struct acpi_table_lapic_addr_ovr *) header;
- if (!lapic)
- return -EINVAL;
- acpi_table_print_madt_entry(header);
- if (lapic->address) {
- iounmap((void *) ipi_base_addr);
- ipi_base_addr = (unsigned long) ioremap(lapic->address, 0);
- }
- return 0;
- }
- static int __init
- acpi_parse_lsapic (acpi_table_entry_header *header)
- {
- struct acpi_table_lsapic *lsapic;
- lsapic = (struct acpi_table_lsapic *) header;
- if (!lsapic)
- return -EINVAL;
- acpi_table_print_madt_entry(header);
- printk("CPU %d (0x%04x)", total_cpus, (lsapic->id << 8) | lsapic->eid);
- if (lsapic->flags.enabled) {
- available_cpus++;
- printk(" enabled");
- #ifdef CONFIG_SMP
- smp_boot_data.cpu_phys_id[total_cpus] = (lsapic->id << 8) | lsapic->eid;
- if (hard_smp_processor_id() == smp_boot_data.cpu_phys_id[total_cpus])
- printk(" (BSP)");
- #endif
- }
- else {
- printk(" disabled");
- #ifdef CONFIG_SMP
- smp_boot_data.cpu_phys_id[total_cpus] = -1;
- #endif
- }
- printk("n");
- total_cpus++;
- return 0;
- }
- static int __init
- acpi_parse_lapic_nmi (acpi_table_entry_header *header)
- {
- struct acpi_table_lapic_nmi *lacpi_nmi;
- lacpi_nmi = (struct acpi_table_lapic_nmi*) header;
- if (!lacpi_nmi)
- return -EINVAL;
- acpi_table_print_madt_entry(header);
- /* TBD: Support lapic_nmi entries */
- return 0;
- }
- static int __init
- acpi_find_iosapic (unsigned int gsi, u32 *gsi_base, char **iosapic_address)
- {
- struct acpi_table_iosapic *iosapic;
- int ver;
- int max_pin;
- char *p;
- char *end;
- if (!gsi_base || !iosapic_address)
- return -ENODEV;
- p = (char *) (acpi_madt + 1);
- end = p + (acpi_madt->header.length - sizeof(struct acpi_table_madt));
- while (p < end) {
- if (*p == ACPI_MADT_IOSAPIC) {
- iosapic = (struct acpi_table_iosapic *) p;
- *gsi_base = iosapic->global_irq_base;
- *iosapic_address = ioremap(iosapic->address, 0);
- ver = iosapic_version(*iosapic_address);
- max_pin = (ver >> 16) & 0xff;
- if ((gsi - *gsi_base) <= max_pin)
- return 0; /* Found it! */
- }
- p += p[1];
- }
- return -ENODEV;
- }
- static int __init
- acpi_parse_iosapic (acpi_table_entry_header *header)
- {
- struct acpi_table_iosapic *iosapic;
- iosapic = (struct acpi_table_iosapic *) header;
- if (!iosapic)
- return -EINVAL;
- acpi_table_print_madt_entry(header);
- if (iosapic_init) {
- #ifndef CONFIG_ITANIUM
- /* PCAT_COMPAT flag indicates dual-8259 setup */
- iosapic_init(iosapic->address, iosapic->global_irq_base,
- acpi_madt->flags.pcat_compat);
- #else
- /* Firmware on old Itanium systems is broken */
- iosapic_init(iosapic->address, iosapic->global_irq_base, 1);
- #endif
- }
- return 0;
- }
- static int __init
- acpi_parse_plat_int_src (acpi_table_entry_header *header)
- {
- struct acpi_table_plat_int_src *plintsrc;
- int vector;
- u32 gsi_base;
- char *iosapic_address;
- plintsrc = (struct acpi_table_plat_int_src *) header;
- if (!plintsrc)
- return -EINVAL;
- acpi_table_print_madt_entry(header);
- if (!iosapic_register_platform_intr) {
- printk(KERN_WARNING PREFIX "No ACPI platform interrupt supportn");
- return -ENODEV;
- }
- if (acpi_find_iosapic(plintsrc->global_irq, &gsi_base, &iosapic_address)) {
- printk(KERN_WARNING PREFIX "IOSAPIC not foundn");
- return -ENODEV;
- }
- /*
- * Get vector assignment for this interrupt, set attributes,
- * and program the IOSAPIC routing table.
- */
- vector = iosapic_register_platform_intr(plintsrc->type,
- plintsrc->global_irq,
- plintsrc->iosapic_vector,
- plintsrc->eid,
- plintsrc->id,
- (plintsrc->flags.polarity == 1) ? 1 : 0,
- (plintsrc->flags.trigger == 1) ? 1 : 0,
- gsi_base,
- iosapic_address);
- platform_intr_list[plintsrc->type] = vector;
- return 0;
- }
- static int __init
- acpi_parse_int_src_ovr (acpi_table_entry_header *header)
- {
- struct acpi_table_int_src_ovr *p;
- p = (struct acpi_table_int_src_ovr *) header;
- if (!p)
- return -EINVAL;
- acpi_table_print_madt_entry(header);
- /* Ignore if the platform doesn't support overrides */
- if (!iosapic_override_isa_irq)
- return 0;
- iosapic_override_isa_irq(p->bus_irq, p->global_irq,
- (p->flags.polarity == 1) ? 1 : 0,
- (p->flags.trigger == 1) ? 1 : 0);
- return 0;
- }
- static int __init
- acpi_parse_nmi_src (acpi_table_entry_header *header)
- {
- struct acpi_table_nmi_src *nmi_src;
- nmi_src = (struct acpi_table_nmi_src*) header;
- if (!nmi_src)
- return -EINVAL;
- acpi_table_print_madt_entry(header);
- /* TBD: Support nimsrc entries */
- return 0;
- }
- static int __init
- acpi_parse_madt (unsigned long phys_addr, unsigned long size)
- {
- if (!phys_addr || !size)
- return -EINVAL;
- acpi_madt = (struct acpi_table_madt *) __va(phys_addr);
- /* remember the value for reference after free_initmem() */
- has_8259 = acpi_madt->flags.pcat_compat;
- /* Get base address of IPI Message Block */
- if (acpi_madt->lapic_address)
- ipi_base_addr = (unsigned long) ioremap(acpi_madt->lapic_address, 0);
- printk(KERN_INFO PREFIX "Local APIC address 0x%lxn", ipi_base_addr);
- return 0;
- }
- static int __init
- acpi_parse_fadt (unsigned long phys_addr, unsigned long size)
- {
- struct acpi_table_header *fadt_header;
- fadt_descriptor_rev2 *fadt;
- u32 sci_irq, gsi_base;
- char *iosapic_address;
- if (!phys_addr || !size)
- return -EINVAL;
- fadt_header = (struct acpi_table_header *) __va(phys_addr);
- if (fadt_header->revision != 3)
- return -ENODEV; /* Only deal with ACPI 2.0 FADT */
- fadt = (fadt_descriptor_rev2 *) fadt_header;
- if (!(fadt->iapc_boot_arch & BAF_8042_KEYBOARD_CONTROLLER))
- acpi_kbd_controller_present = 0;
- sci_irq = fadt->sci_int;
- if (has_8259 && sci_irq < 16)
- return 0; /* legacy, no setup required */
- if (!iosapic_register_intr)
- return -ENODEV;
- if (!acpi_find_iosapic(sci_irq, &gsi_base, &iosapic_address))
- iosapic_register_intr(sci_irq, 0, 0, gsi_base, iosapic_address);
- return 0;
- }
- #ifdef CONFIG_SERIAL_ACPI
- #include <linux/acpi_serial.h>
- static int __init
- acpi_parse_spcr (unsigned long phys_addr, unsigned long size)
- {
- acpi_ser_t *spcr;
- u32 gsi, gsi_base;
- char *iosapic_address;
- if (!phys_addr || !size)
- return -EINVAL;
- if (!iosapic_register_intr)
- return -ENODEV;
- /*
- * ACPI is able to describe serial ports that live at non-standard
- * memory addresses and use non-standard interrupts, either via
- * direct SAPIC mappings or via PCI interrupts. We handle interrupt
- * routing for SAPIC-based (non-PCI) devices here. Interrupt routing
- * for PCI devices will be handled when processing the PCI Interrupt
- * Routing Table (PRT).
- */
- spcr = (acpi_ser_t *) __va(phys_addr);
- setup_serial_acpi(spcr);
- if (spcr->length < sizeof(acpi_ser_t))
- /* Table not long enough for full info, thus no interrupt */
- return -ENODEV;
- if ((spcr->base_addr.space_id != ACPI_SERIAL_PCICONF_SPACE) &&
- (spcr->int_type == ACPI_SERIAL_INT_SAPIC)) {
- /* We have a UART in memory space with an SAPIC interrupt */
- gsi = (spcr->global_int[3] << 24) |
- (spcr->global_int[2] << 16) |
- (spcr->global_int[1] << 8) |
- (spcr->global_int[0]);
- if (!acpi_find_iosapic(gsi, &gsi_base, &iosapic_address))
- iosapic_register_intr(gsi, 1, 1,
- gsi_base, iosapic_address);
- }
- return 0;
- }
- #endif /*CONFIG_SERIAL_ACPI*/
- unsigned long __init
- acpi_find_rsdp (void)
- {
- unsigned long rsdp_phys = 0;
- if (efi.acpi20)
- rsdp_phys = __pa(efi.acpi20);
- else if (efi.acpi)
- printk(KERN_WARNING PREFIX "v1.0/r0.71 tables no longer supportedn");
- return rsdp_phys;
- }
- int __init
- acpi_boot_init (char *cmdline)
- {
- int result;
- /* Initialize the ACPI boot-time table parser */
- result = acpi_table_init(cmdline);
- if (result)
- return result;
- /*
- * MADT
- * ----
- * Parse the Multiple APIC Description Table (MADT), if exists.
- * Note that this table provides platform SMP configuration
- * information -- the successor to MPS tables.
- */
- if (acpi_table_parse(ACPI_APIC, acpi_parse_madt) < 1) {
- printk(KERN_ERR PREFIX "Can't find MADTn");
- goto skip_madt;
- }
- /* Local APIC */
- if (acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR,
- acpi_parse_lapic_addr_ovr) < 0)
- printk(KERN_ERR PREFIX "Error parsing LAPIC address override entryn");
- if (acpi_table_parse_madt(ACPI_MADT_LSAPIC,
- acpi_parse_lsapic) < 1)
- printk(KERN_ERR PREFIX "Error parsing MADT - no LAPIC entriesn");
- if (acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI,
- acpi_parse_lapic_nmi) < 0)
- printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entryn");
- /* I/O APIC */
- if (acpi_table_parse_madt(ACPI_MADT_IOSAPIC,
- acpi_parse_iosapic) < 1)
- printk(KERN_ERR PREFIX "Error parsing MADT - no IOAPIC entriesn");
- /* System-Level Interrupt Routing */
- if (acpi_table_parse_madt(ACPI_MADT_PLAT_INT_SRC,
- acpi_parse_plat_int_src) < 0)
- printk(KERN_ERR PREFIX "Error parsing platform interrupt source entryn");
- if (acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR,
- acpi_parse_int_src_ovr) < 0)
- printk(KERN_ERR PREFIX "Error parsing interrupt source overrides entryn");
- if (acpi_table_parse_madt(ACPI_MADT_NMI_SRC,
- acpi_parse_nmi_src) < 0)
- printk(KERN_ERR PREFIX "Error parsing NMI SRC entryn");
- skip_madt:
- /*
- * The FADT table contains an SCI_INT line, by which the system
- * gets interrupts such as power and sleep buttons. If it's not
- * on a Legacy interrupt, it needs to be setup.
- */
- if (acpi_table_parse(ACPI_FACP, acpi_parse_fadt) < 1)
- printk(KERN_ERR PREFIX "Can't find FADTn");
- #ifdef CONFIG_SERIAL_ACPI
- acpi_table_parse(ACPI_SPCR, acpi_parse_spcr);
- #endif
- #ifdef CONFIG_SMP
- if (available_cpus == 0) {
- printk("ACPI: Found 0 CPUS; assuming 1n");
- available_cpus = 1; /* We've got at least one of these, no? */
- }
- smp_boot_data.cpu_count = total_cpus;
- #endif
- /* Make boot-up look pretty */
- printk("%d CPUs available, %d CPUs totaln", available_cpus, total_cpus);
- return 0;
- }
- /* --------------------------------------------------------------------------
- PCI Interrupt Routing
- -------------------------------------------------------------------------- */
- int __init
- acpi_get_prt (struct pci_vector_struct **vectors, int *count)
- {
- struct pci_vector_struct *vector;
- struct list_head *node;
- struct acpi_prt_entry *entry;
- int i = 0;
- if (!vectors || !count)
- return -EINVAL;
- *vectors = NULL;
- *count = 0;
- if (acpi_prt.count < 0) {
- printk(KERN_ERR PREFIX "No PCI interrupt routing entriesn");
- return -ENODEV;
- }
- /* Allocate vectors */
- *vectors = kmalloc(sizeof(struct pci_vector_struct) * acpi_prt.count, GFP_KERNEL);
- if (!(*vectors))
- return -ENOMEM;
- /* Convert PRT entries to IOSAPIC PCI vectors */
- vector = *vectors;
- list_for_each(node, &acpi_prt.entries) {
- entry = (struct acpi_prt_entry *)node;
- vector[i].segment = entry->id.segment;
- vector[i].bus = entry->id.bus;
- vector[i].pci_id = ((u32) entry->id.device << 16) | 0xffff;
- vector[i].pin = entry->pin;
- vector[i].irq = entry->link.index;
- i++;
- }
- *count = acpi_prt.count;
- return 0;
- }
- /* Assume IA64 always use I/O SAPIC */
- int __init
- acpi_get_interrupt_model (int *type)
- {
- if (!type)
- return -EINVAL;
- *type = ACPI_IRQ_MODEL_IOSAPIC;
- return 0;
- }
- int
- acpi_irq_to_vector (u32 irq)
- {
- if (has_8259 && irq < 16)
- return isa_irq_to_vector(irq);
- return gsi_to_vector(irq);
- }
- #endif /* CONFIG_ACPI_BOOT */