/* * acpi.c - Architecture-Specific Low-Level ACPI Support * * Copyright (C) 1999 VA Linux Systems * Copyright (C) 1999,2000 Walt Drummond * Copyright (C) 2000, 2002-2003 Hewlett-Packard Co. * David Mosberger-Tang * Copyright (C) 2000 Intel Corp. * Copyright (C) 2000,2001 J.I. Lee * Copyright (C) 2001 Paul Diefenbaugh * Copyright (C) 2001 Jenna Hall * Copyright (C) 2001 Takayoshi Kochi * Copyright (C) 2002 Erich Focht * Copyright (C) 2004 Ashok Raj * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define BAD_MADT_ENTRY(entry, end) ( \ (!entry) || (unsigned long)entry + sizeof(*entry) > end || \ ((acpi_table_entry_header *)entry)->length != sizeof(*entry)) #define PREFIX "ACPI: " void (*pm_idle) (void); EXPORT_SYMBOL(pm_idle); void (*pm_power_off) (void); EXPORT_SYMBOL(pm_power_off); unsigned char acpi_kbd_controller_present = 1; unsigned char acpi_legacy_devices; static unsigned int __initdata acpi_madt_rev; unsigned int acpi_cpei_override; unsigned int acpi_cpei_phys_cpuid; #define MAX_SAPICS 256 u16 ia64_acpiid_to_sapicid[MAX_SAPICS] = {[0 ... MAX_SAPICS - 1] = -1 }; EXPORT_SYMBOL(ia64_acpiid_to_sapicid); 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(KERN_ERR "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(KERN_ERR "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(KERN_ERR "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n"); return "dig"; } if (!strcmp(hdr->oem_id, "HP")) { return "hpzx1"; } else if (!strcmp(hdr->oem_id, "SGI")) { return "sn2"; } return "dig"; #else # if defined (CONFIG_IA64_HP_SIM) return "hpsim"; # elif defined (CONFIG_IA64_HP_ZX1) return "hpzx1"; # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB) return "hpzx1_swiotlb"; # elif defined (CONFIG_IA64_SGI_SN2) return "sn2"; # elif defined (CONFIG_IA64_DIG) return "dig"; # else # error Unknown platform. Fix acpi.c. # endif #endif } #ifdef CONFIG_ACPI #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) { /* corrected platform error interrupt */ vector = platform_intr_list[int_type]; } else printk(KERN_ERR "acpi_request_vector(): invalid interrupt type\n"); 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, const unsigned long end) { struct acpi_table_lapic_addr_ovr *lapic; lapic = (struct acpi_table_lapic_addr_ovr *)header; if (BAD_MADT_ENTRY(lapic, end)) return -EINVAL; if (lapic->address) { iounmap(ipi_base_addr); ipi_base_addr = ioremap(lapic->address, 0); } return 0; } static int __init acpi_parse_lsapic(acpi_table_entry_header * header, const unsigned long end) { struct acpi_table_lsapic *lsapic; lsapic = (struct acpi_table_lsapic *)header; if (BAD_MADT_ENTRY(lsapic, end)) return -EINVAL; if (lsapic->flags.enabled) { #ifdef CONFIG_SMP smp_boot_data.cpu_phys_id[available_cpus] = (lsapic->id << 8) | lsapic->eid; #endif ia64_acpiid_to_sapicid[lsapic->acpi_id] = (lsapic->id << 8) | lsapic->eid; ++available_cpus; } total_cpus++; return 0; } static int __init acpi_parse_lapic_nmi(acpi_table_entry_header * header, const unsigned long end) { struct acpi_table_lapic_nmi *lacpi_nmi; lacpi_nmi = (struct acpi_table_lapic_nmi *)header; if (BAD_MADT_ENTRY(lacpi_nmi, end)) return -EINVAL; /* TBD: Support lapic_nmi entries */ return 0; } static int __init acpi_parse_iosapic(acpi_table_entry_header * header, const unsigned long end) { struct acpi_table_iosapic *iosapic; iosapic = (struct acpi_table_iosapic *)header; if (BAD_MADT_ENTRY(iosapic, end)) return -EINVAL; return iosapic_init(iosapic->address, iosapic->global_irq_base); } static int __init acpi_parse_plat_int_src(acpi_table_entry_header * header, const unsigned long end) { struct acpi_table_plat_int_src *plintsrc; int vector; plintsrc = (struct acpi_table_plat_int_src *)header; if (BAD_MADT_ENTRY(plintsrc, end)) return -EINVAL; /* * 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) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW, (plintsrc->flags.trigger == 1) ? IOSAPIC_EDGE : IOSAPIC_LEVEL); platform_intr_list[plintsrc->type] = vector; if (acpi_madt_rev > 1) { acpi_cpei_override = plintsrc->plint_flags.cpei_override_flag; } /* * Save the physical id, so we can check when its being removed */ acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff; return 0; } #ifdef CONFIG_HOTPLUG_CPU unsigned int can_cpei_retarget(void) { extern int cpe_vector; extern unsigned int force_cpei_retarget; /* * Only if CPEI is supported and the override flag * is present, otherwise return that its re-targettable * if we are in polling mode. */ if (cpe_vector > 0) { if (acpi_cpei_override || force_cpei_retarget) return 1; else return 0; } return 1; } unsigned int is_cpu_cpei_target(unsigned int cpu) { unsigned int logical_id; logical_id = cpu_logical_id(acpi_cpei_phys_cpuid); if (logical_id == cpu) return 1; else return 0; } void set_cpei_target_cpu(unsigned int cpu) { acpi_cpei_phys_cpuid = cpu_physical_id(cpu); } #endif unsigned int get_cpei_target_cpu(void) { return acpi_cpei_phys_cpuid; } static int __init acpi_parse_int_src_ovr(acpi_table_entry_header * header, const unsigned long end) { struct acpi_table_int_src_ovr *p; p = (struct acpi_table_int_src_ovr *)header; if (BAD_MADT_ENTRY(p, end)) return -EINVAL; iosapic_override_isa_irq(p->bus_irq, p->global_irq, (p->flags.polarity == 1) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW, (p->flags.trigger == 1) ? IOSAPIC_EDGE : IOSAPIC_LEVEL); return 0; } static int __init acpi_parse_nmi_src(acpi_table_entry_header * header, const unsigned long end) { struct acpi_table_nmi_src *nmi_src; nmi_src = (struct acpi_table_nmi_src *)header; if (BAD_MADT_ENTRY(nmi_src, end)) return -EINVAL; /* TBD: Support nimsrc entries */ return 0; } static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id) { if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) { /* * Unfortunately ITC_DRIFT is not yet part of the * official SAL spec, so the ITC_DRIFT bit is not * set by the BIOS on this hardware. */ sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT; cyclone_setup(); } } 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); acpi_madt_rev = acpi_madt->header.revision; /* remember the value for reference after free_initmem() */ #ifdef CONFIG_ITANIUM has_8259 = 1; /* Firmware on old Itanium systems is broken */ #else has_8259 = acpi_madt->flags.pcat_compat; #endif iosapic_system_init(has_8259); /* Get base address of IPI Message Block */ if (acpi_madt->lapic_address) ipi_base_addr = ioremap(acpi_madt->lapic_address, 0); printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr); acpi_madt_oem_check(acpi_madt->header.oem_id, acpi_madt->header.oem_table_id); return 0; } #ifdef CONFIG_ACPI_NUMA #undef SLIT_DEBUG #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32) static int __initdata srat_num_cpus; /* number of cpus */ static u32 __devinitdata pxm_flag[PXM_FLAG_LEN]; #define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag)) #define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag)) /* maps to convert between proximity domain and logical node ID */ int __devinitdata pxm_to_nid_map[MAX_PXM_DOMAINS]; int __initdata nid_to_pxm_map[MAX_NUMNODES]; static struct acpi_table_slit __initdata *slit_table; /* * ACPI 2.0 SLIT (System Locality Information Table) * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf */ void __init acpi_numa_slit_init(struct acpi_table_slit *slit) { u32 len; len = sizeof(struct acpi_table_header) + 8 + slit->localities * slit->localities; if (slit->header.length != len) { printk(KERN_ERR "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n", len, slit->header.length); memset(numa_slit, 10, sizeof(numa_slit)); return; } slit_table = slit; } void __init acpi_numa_processor_affinity_init(struct acpi_table_processor_affinity *pa) { /* record this node in proximity bitmap */ pxm_bit_set(pa->proximity_domain); node_cpuid[srat_num_cpus].phys_id = (pa->apic_id << 8) | (pa->lsapic_eid); /* nid should be overridden as logical node id later */ node_cpuid[srat_num_cpus].nid = pa->proximity_domain; srat_num_cpus++; } void __init acpi_numa_memory_affinity_init(struct acpi_table_memory_affinity *ma) { unsigned long paddr, size; u8 pxm; struct node_memblk_s *p, *q, *pend; pxm = ma->proximity_domain; /* fill node memory chunk structure */ paddr = ma->base_addr_hi; paddr = (paddr << 32) | ma->base_addr_lo; size = ma->length_hi; size = (size << 32) | ma->length_lo; /* Ignore disabled entries */ if (!ma->flags.enabled) return; /* record this node in proximity bitmap */ pxm_bit_set(pxm); /* Insertion sort based on base address */ pend = &node_memblk[num_node_memblks]; for (p = &node_memblk[0]; p < pend; p++) { if (paddr < p->start_paddr) break; } if (p < pend) { for (q = pend - 1; q >= p; q--) *(q + 1) = *q; } p->start_paddr = paddr; p->size = size; p->nid = pxm; num_node_memblks++; } void __init acpi_numa_arch_fixup(void) { int i, j, node_from, node_to; /* If there's no SRAT, fix the phys_id and mark node 0 online */ if (srat_num_cpus == 0) { node_set_online(0); node_cpuid[0].phys_id = hard_smp_processor_id(); return; } /* * MCD - This can probably be dropped now. No need for pxm ID to node ID * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES. */ /* calculate total number of nodes in system from PXM bitmap */ memset(pxm_to_nid_map, -1, sizeof(pxm_to_nid_map)); memset(nid_to_pxm_map, -1, sizeof(nid_to_pxm_map)); nodes_clear(node_online_map); for (i = 0; i < MAX_PXM_DOMAINS; i++) { if (pxm_bit_test(i)) { int nid = num_online_nodes(); pxm_to_nid_map[i] = nid; nid_to_pxm_map[nid] = i; node_set_online(nid); } } /* set logical node id in memory chunk structure */ for (i = 0; i < num_node_memblks; i++) node_memblk[i].nid = pxm_to_nid_map[node_memblk[i].nid]; /* assign memory bank numbers for each chunk on each node */ for_each_online_node(i) { int bank; bank = 0; for (j = 0; j < num_node_memblks; j++) if (node_memblk[j].nid == i) node_memblk[j].bank = bank++; } /* set logical node id in cpu structure */ for (i = 0; i < srat_num_cpus; i++) node_cpuid[i].nid = pxm_to_nid_map[node_cpuid[i].nid]; printk(KERN_INFO "Number of logical nodes in system = %d\n", num_online_nodes()); printk(KERN_INFO "Number of memory chunks in system = %d\n", num_node_memblks); if (!slit_table) return; memset(numa_slit, -1, sizeof(numa_slit)); for (i = 0; i < slit_table->localities; i++) { if (!pxm_bit_test(i)) continue; node_from = pxm_to_nid_map[i]; for (j = 0; j < slit_table->localities; j++) { if (!pxm_bit_test(j)) continue; node_to = pxm_to_nid_map[j]; node_distance(node_from, node_to) = slit_table->entry[i * slit_table->localities + j]; } } #ifdef SLIT_DEBUG printk("ACPI 2.0 SLIT locality table:\n"); for_each_online_node(i) { for_each_online_node(j) printk("%03d ", node_distance(i, j)); printk("\n"); } #endif } #endif /* CONFIG_ACPI_NUMA */ /* * success: return IRQ number (>=0) * failure: return < 0 */ int acpi_register_gsi(u32 gsi, int edge_level, int active_high_low) { if (has_8259 && gsi < 16) return isa_irq_to_vector(gsi); return iosapic_register_intr(gsi, (active_high_low == ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW, (edge_level == ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE : IOSAPIC_LEVEL); } EXPORT_SYMBOL(acpi_register_gsi); void acpi_unregister_gsi(u32 gsi) { iosapic_unregister_intr(gsi); } EXPORT_SYMBOL(acpi_unregister_gsi); static int __init acpi_parse_fadt(unsigned long phys_addr, unsigned long size) { struct acpi_table_header *fadt_header; struct fadt_descriptor_rev2 *fadt; 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 = (struct fadt_descriptor_rev2 *)fadt_header; if (!(fadt->iapc_boot_arch & BAF_8042_KEYBOARD_CONTROLLER)) acpi_kbd_controller_present = 0; if (fadt->iapc_boot_arch & BAF_LEGACY_DEVICES) acpi_legacy_devices = 1; acpi_register_gsi(fadt->sci_int, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW); return 0; } 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 supported\n"); return rsdp_phys; } int __init acpi_boot_init(void) { /* * 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 MADT\n"); goto skip_madt; } /* Local APIC */ if (acpi_table_parse_madt (ACPI_MADT_LAPIC_ADDR_OVR, acpi_parse_lapic_addr_ovr, 0) < 0) printk(KERN_ERR PREFIX "Error parsing LAPIC address override entry\n"); if (acpi_table_parse_madt(ACPI_MADT_LSAPIC, acpi_parse_lsapic, NR_CPUS) < 1) printk(KERN_ERR PREFIX "Error parsing MADT - no LAPIC entries\n"); if (acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0) < 0) printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); /* I/O APIC */ if (acpi_table_parse_madt (ACPI_MADT_IOSAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) printk(KERN_ERR PREFIX "Error parsing MADT - no IOSAPIC entries\n"); /* System-Level Interrupt Routing */ if (acpi_table_parse_madt (ACPI_MADT_PLAT_INT_SRC, acpi_parse_plat_int_src, ACPI_MAX_PLATFORM_INTERRUPTS) < 0) printk(KERN_ERR PREFIX "Error parsing platform interrupt source entry\n"); if (acpi_table_parse_madt (ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr, 0) < 0) printk(KERN_ERR PREFIX "Error parsing interrupt source overrides entry\n"); if (acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src, 0) < 0) printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); skip_madt: /* * FADT says whether a legacy keyboard controller is present. * The FADT also 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_FADT, acpi_parse_fadt) < 1) printk(KERN_ERR PREFIX "Can't find FADT\n"); #ifdef CONFIG_SMP if (available_cpus == 0) { printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n"); printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id()); smp_boot_data.cpu_phys_id[available_cpus] = hard_smp_processor_id(); available_cpus = 1; /* We've got at least one of these, no? */ } smp_boot_data.cpu_count = available_cpus; smp_build_cpu_map(); # ifdef CONFIG_ACPI_NUMA if (srat_num_cpus == 0) { int cpu, i = 1; for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++) if (smp_boot_data.cpu_phys_id[cpu] != hard_smp_processor_id()) node_cpuid[i++].phys_id = smp_boot_data.cpu_phys_id[cpu]; } # endif #endif #ifdef CONFIG_ACPI_NUMA build_cpu_to_node_map(); #endif /* Make boot-up look pretty */ printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus, total_cpus); return 0; } int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) { int vector; if (has_8259 && gsi < 16) *irq = isa_irq_to_vector(gsi); else { vector = gsi_to_vector(gsi); if (vector == -1) return -1; *irq = vector; } return 0; } /* * ACPI based hotplug CPU support */ #ifdef CONFIG_ACPI_HOTPLUG_CPU static int acpi_map_cpu2node(acpi_handle handle, int cpu, long physid) { #ifdef CONFIG_ACPI_NUMA int pxm_id; pxm_id = acpi_get_pxm(handle); /* * Assuming that the container driver would have set the proximity * domain and would have initialized pxm_to_nid_map[pxm_id] && pxm_flag */ node_cpuid[cpu].nid = (pxm_id < 0) ? 0 : pxm_to_nid_map[pxm_id]; node_cpuid[cpu].phys_id = physid; #endif return (0); } int acpi_map_lsapic(acpi_handle handle, int *pcpu) { struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; union acpi_object *obj; struct acpi_table_lsapic *lsapic; cpumask_t tmp_map; long physid; int cpu; if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) return -EINVAL; if (!buffer.length || !buffer.pointer) return -EINVAL; obj = buffer.pointer; if (obj->type != ACPI_TYPE_BUFFER || obj->buffer.length < sizeof(*lsapic)) { acpi_os_free(buffer.pointer); return -EINVAL; } lsapic = (struct acpi_table_lsapic *)obj->buffer.pointer; if ((lsapic->header.type != ACPI_MADT_LSAPIC) || (!lsapic->flags.enabled)) { acpi_os_free(buffer.pointer); return -EINVAL; } physid = ((lsapic->id << 8) | (lsapic->eid)); acpi_os_free(buffer.pointer); buffer.length = ACPI_ALLOCATE_BUFFER; buffer.pointer = NULL; cpus_complement(tmp_map, cpu_present_map); cpu = first_cpu(tmp_map); if (cpu >= NR_CPUS) return -EINVAL; acpi_map_cpu2node(handle, cpu, physid); cpu_set(cpu, cpu_present_map); ia64_cpu_to_sapicid[cpu] = physid; ia64_acpiid_to_sapicid[lsapic->acpi_id] = ia64_cpu_to_sapicid[cpu]; *pcpu = cpu; return (0); } EXPORT_SYMBOL(acpi_map_lsapic); int acpi_unmap_lsapic(int cpu) { int i; for (i = 0; i < MAX_SAPICS; i++) { if (ia64_acpiid_to_sapicid[i] == ia64_cpu_to_sapicid[cpu]) { ia64_acpiid_to_sapicid[i] = -1; break; } } ia64_cpu_to_sapicid[cpu] = -1; cpu_clear(cpu, cpu_present_map); #ifdef CONFIG_ACPI_NUMA /* NUMA specific cleanup's */ #endif return (0); } EXPORT_SYMBOL(acpi_unmap_lsapic); #endif /* CONFIG_ACPI_HOTPLUG_CPU */ #ifdef CONFIG_ACPI_NUMA static acpi_status __devinit acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret) { struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; union acpi_object *obj; struct acpi_table_iosapic *iosapic; unsigned int gsi_base; int pxm, node; /* Only care about objects w/ a method that returns the MADT */ if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) return AE_OK; if (!buffer.length || !buffer.pointer) return AE_OK; obj = buffer.pointer; if (obj->type != ACPI_TYPE_BUFFER || obj->buffer.length < sizeof(*iosapic)) { acpi_os_free(buffer.pointer); return AE_OK; } iosapic = (struct acpi_table_iosapic *)obj->buffer.pointer; if (iosapic->header.type != ACPI_MADT_IOSAPIC) { acpi_os_free(buffer.pointer); return AE_OK; } gsi_base = iosapic->global_irq_base; acpi_os_free(buffer.pointer); /* * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell * us which node to associate this with. */ pxm = acpi_get_pxm(handle); if (pxm < 0) return AE_OK; node = pxm_to_nid_map[pxm]; if (node >= MAX_NUMNODES || !node_online(node) || cpus_empty(node_to_cpumask(node))) return AE_OK; /* We know a gsi to node mapping! */ map_iosapic_to_node(gsi_base, node); return AE_OK; } static int __init acpi_map_iosapics (void) { acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL); return 0; } fs_initcall(acpi_map_iosapics); #endif /* CONFIG_ACPI_NUMA */ int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) { int err; if ((err = iosapic_init(phys_addr, gsi_base))) return err; #ifdef CONFIG_ACPI_NUMA acpi_map_iosapic(handle, 0, NULL, NULL); #endif /* CONFIG_ACPI_NUMA */ return 0; } EXPORT_SYMBOL(acpi_register_ioapic); int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) { return iosapic_remove(gsi_base); } EXPORT_SYMBOL(acpi_unregister_ioapic); #endif /* CONFIG_ACPI */