diff options
Diffstat (limited to 'arch/ia64/kernel/acpi.c')
| -rw-r--r-- | arch/ia64/kernel/acpi.c | 913 |
1 files changed, 0 insertions, 913 deletions
diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c deleted file mode 100644 index 41e8fe55cd..0000000000 --- a/arch/ia64/kernel/acpi.c +++ /dev/null @@ -1,913 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * 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, 2002-2003 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> - * Copyright (C) 2001 Jenna Hall <jenna.s.hall@intel.com> - * Copyright (C) 2001 Takayoshi Kochi <t-kochi@bq.jp.nec.com> - * Copyright (C) 2002 Erich Focht <efocht@ess.nec.de> - * Copyright (C) 2004 Ashok Raj <ashok.raj@intel.com> - */ - -#include <linux/module.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 <linux/mmzone.h> -#include <linux/nodemask.h> -#include <linux/slab.h> -#include <acpi/processor.h> -#include <asm/io.h> -#include <asm/iosapic.h> -#include <asm/page.h> -#include <asm/numa.h> -#include <asm/sal.h> -#include <asm/cyclone.h> - -#define PREFIX "ACPI: " - -int acpi_lapic; -unsigned int acpi_cpei_override; -unsigned int acpi_cpei_phys_cpuid; - -#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; -} - -void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size) -{ - return __va(phys); -} - -void __init __acpi_unmap_table(void __iomem *map, unsigned long size) -{ -} - -/* -------------------------------------------------------------------------- - Boot-time Table Parsing - -------------------------------------------------------------------------- */ - -static int available_cpus __initdata; -struct acpi_table_madt *acpi_madt __initdata; -static u8 has_8259; - -static int __init -acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header, - const unsigned long end) -{ - struct acpi_madt_local_apic_override *lapic; - - lapic = (struct acpi_madt_local_apic_override *)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(union acpi_subtable_headers *header, const unsigned long end) -{ - struct acpi_madt_local_sapic *lsapic; - - lsapic = (struct acpi_madt_local_sapic *)header; - - /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */ - - if (lsapic->lapic_flags & ACPI_MADT_ENABLED) { -#ifdef CONFIG_SMP - smp_boot_data.cpu_phys_id[available_cpus] = - (lsapic->id << 8) | lsapic->eid; -#endif - ++available_cpus; - } - - total_cpus++; - return 0; -} - -static int __init -acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end) -{ - struct acpi_madt_local_apic_nmi *lacpi_nmi; - - lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header; - - if (BAD_MADT_ENTRY(lacpi_nmi, end)) - return -EINVAL; - - /* TBD: Support lapic_nmi entries */ - return 0; -} - -static int __init -acpi_parse_iosapic(union acpi_subtable_headers * header, const unsigned long end) -{ - struct acpi_madt_io_sapic *iosapic; - - iosapic = (struct acpi_madt_io_sapic *)header; - - if (BAD_MADT_ENTRY(iosapic, end)) - return -EINVAL; - - return iosapic_init(iosapic->address, iosapic->global_irq_base); -} - -static unsigned int __initdata acpi_madt_rev; - -static int __init -acpi_parse_plat_int_src(union acpi_subtable_headers * header, - const unsigned long end) -{ - struct acpi_madt_interrupt_source *plintsrc; - int vector; - - plintsrc = (struct acpi_madt_interrupt_source *)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->io_sapic_vector, - plintsrc->eid, - plintsrc->id, - ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) == - ACPI_MADT_POLARITY_ACTIVE_HIGH) ? - IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW, - ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) == - ACPI_MADT_TRIGGER_EDGE) ? - IOSAPIC_EDGE : IOSAPIC_LEVEL); - - platform_intr_list[plintsrc->type] = vector; - if (acpi_madt_rev > 1) { - acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE; - } - - /* - * 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(union acpi_subtable_headers * header, - const unsigned long end) -{ - struct acpi_madt_interrupt_override *p; - - p = (struct acpi_madt_interrupt_override *)header; - - if (BAD_MADT_ENTRY(p, end)) - return -EINVAL; - - iosapic_override_isa_irq(p->source_irq, p->global_irq, - ((p->inti_flags & ACPI_MADT_POLARITY_MASK) == - ACPI_MADT_POLARITY_ACTIVE_LOW) ? - IOSAPIC_POL_LOW : IOSAPIC_POL_HIGH, - ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) == - ACPI_MADT_TRIGGER_LEVEL) ? - IOSAPIC_LEVEL : IOSAPIC_EDGE); - return 0; -} - -static int __init -acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end) -{ - struct acpi_madt_nmi_source *nmi_src; - - nmi_src = (struct acpi_madt_nmi_source *)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(struct acpi_table_header *table) -{ - acpi_madt = (struct acpi_table_madt *)table; - - 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 & ACPI_MADT_PCAT_COMPAT; -#endif - iosapic_system_init(has_8259); - - /* Get base address of IPI Message Block */ - - if (acpi_madt->address) - ipi_base_addr = ioremap(acpi_madt->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 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)) -static struct acpi_table_slit __initdata *slit_table; -cpumask_t early_cpu_possible_map = CPU_MASK_NONE; - -static int __init -get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa) -{ - int pxm; - - pxm = pa->proximity_domain_lo; - if (acpi_srat_revision >= 2) - pxm += pa->proximity_domain_hi[0] << 8; - return pxm; -} - -static int __init -get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma) -{ - int pxm; - - pxm = ma->proximity_domain; - if (acpi_srat_revision <= 1) - pxm &= 0xff; - - return pxm; -} - -/* - * 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->locality_count * slit->locality_count; - if (slit->header.length != len) { - printk(KERN_ERR - "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n", - len, slit->header.length); - return; - } - slit_table = slit; -} - -void __init -acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa) -{ - int pxm; - - if (!(pa->flags & ACPI_SRAT_CPU_ENABLED)) - return; - - if (srat_num_cpus >= ARRAY_SIZE(node_cpuid)) { - printk_once(KERN_WARNING - "node_cpuid[%ld] is too small, may not be able to use all cpus\n", - ARRAY_SIZE(node_cpuid)); - return; - } - pxm = get_processor_proximity_domain(pa); - - /* record this node in proximity bitmap */ - pxm_bit_set(pxm); - - node_cpuid[srat_num_cpus].phys_id = - (pa->apic_id << 8) | (pa->local_sapic_eid); - /* nid should be overridden as logical node id later */ - node_cpuid[srat_num_cpus].nid = pxm; - cpumask_set_cpu(srat_num_cpus, &early_cpu_possible_map); - srat_num_cpus++; -} - -int __init -acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma) -{ - unsigned long paddr, size; - int pxm; - struct node_memblk_s *p, *q, *pend; - - pxm = get_memory_proximity_domain(ma); - - /* fill node memory chunk structure */ - paddr = ma->base_address; - size = ma->length; - - /* Ignore disabled entries */ - if (!(ma->flags & ACPI_SRAT_MEM_ENABLED)) - return -1; - - if (num_node_memblks >= NR_NODE_MEMBLKS) { - pr_err("NUMA: too many memblk ranges\n"); - return -EINVAL; - } - - /* 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++; - return 0; -} - -void __init acpi_numa_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(); - slit_distance(0, 0) = LOCAL_DISTANCE; - goto out; - } - - /* - * 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. - */ - nodes_clear(node_online_map); - for (i = 0; i < MAX_PXM_DOMAINS; i++) { - if (pxm_bit_test(i)) { - int nid = acpi_map_pxm_to_node(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_node(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_each_possible_early_cpu(i) - node_cpuid[i].nid = pxm_to_node(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) { - for (i = 0; i < MAX_NUMNODES; i++) - for (j = 0; j < MAX_NUMNODES; j++) - slit_distance(i, j) = i == j ? - LOCAL_DISTANCE : REMOTE_DISTANCE; - goto out; - } - - memset(numa_slit, -1, sizeof(numa_slit)); - for (i = 0; i < slit_table->locality_count; i++) { - if (!pxm_bit_test(i)) - continue; - node_from = pxm_to_node(i); - for (j = 0; j < slit_table->locality_count; j++) { - if (!pxm_bit_test(j)) - continue; - node_to = pxm_to_node(j); - slit_distance(node_from, node_to) = - slit_table->entry[i * slit_table->locality_count + 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 -out: - node_possible_map = node_online_map; -} -#endif /* CONFIG_ACPI_NUMA */ - -/* - * success: return IRQ number (>=0) - * failure: return < 0 - */ -int acpi_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity) -{ - if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM) - return gsi; - - if (has_8259 && gsi < 16) - return isa_irq_to_vector(gsi); - - return iosapic_register_intr(gsi, - (polarity == - ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH : - IOSAPIC_POL_LOW, - (triggering == - ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE : - IOSAPIC_LEVEL); -} -EXPORT_SYMBOL_GPL(acpi_register_gsi); - -void acpi_unregister_gsi(u32 gsi) -{ - if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM) - return; - - if (has_8259 && gsi < 16) - return; - - iosapic_unregister_intr(gsi); -} -EXPORT_SYMBOL_GPL(acpi_unregister_gsi); - -static int __init acpi_parse_fadt(struct acpi_table_header *table) -{ - struct acpi_table_header *fadt_header; - struct acpi_table_fadt *fadt; - - fadt_header = (struct acpi_table_header *)table; - if (fadt_header->revision != 3) - return -ENODEV; /* Only deal with ACPI 2.0 FADT */ - - fadt = (struct acpi_table_fadt *)fadt_header; - - acpi_register_gsi(NULL, fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE, - ACPI_ACTIVE_LOW); - return 0; -} - -int __init early_acpi_boot_init(void) -{ - int ret; - - /* - * do a partial walk of MADT to determine how many CPUs - * we have including offline CPUs - */ - if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { - printk(KERN_ERR PREFIX "Can't find MADT\n"); - return 0; - } - - ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, - acpi_parse_lsapic, NR_CPUS); - if (ret < 1) - printk(KERN_ERR PREFIX - "Error parsing MADT - no LAPIC entries\n"); - else - acpi_lapic = 1; - -#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; -#endif - /* Make boot-up look pretty */ - printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus, - total_cpus); - - return 0; -} - -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_SIG_MADT, acpi_parse_madt)) { - printk(KERN_ERR PREFIX "Can't find MADT\n"); - goto skip_madt; - } - - /* Local APIC */ - - if (acpi_table_parse_madt - (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 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_TYPE_LOCAL_APIC_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_TYPE_IO_SAPIC, 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_TYPE_INTERRUPT_SOURCE, 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_TYPE_INTERRUPT_OVERRIDE, 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_TYPE_NMI_SOURCE, 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_SIG_FADT, acpi_parse_fadt)) - printk(KERN_ERR PREFIX "Can't find FADT\n"); - -#ifdef CONFIG_ACPI_NUMA -#ifdef CONFIG_SMP - 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 - build_cpu_to_node_map(); -#endif - return 0; -} - -int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) -{ - int tmp; - - if (has_8259 && gsi < 16) - *irq = isa_irq_to_vector(gsi); - else { - tmp = gsi_to_irq(gsi); - if (tmp == -1) - return -1; - *irq = tmp; - } - return 0; -} - -int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) -{ - if (isa_irq >= 16) - return -1; - *gsi = isa_irq; - return 0; -} - -/* - * ACPI based hotplug CPU support - */ -#ifdef CONFIG_ACPI_HOTPLUG_CPU -int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) -{ -#ifdef CONFIG_ACPI_NUMA - /* - * We don't have cpu-only-node hotadd. But if the system equips - * SRAT table, pxm is already found and node is ready. - * So, just pxm_to_nid(pxm) is OK. - * This code here is for the system which doesn't have full SRAT - * table for possible cpus. - */ - node_cpuid[cpu].phys_id = physid; - node_cpuid[cpu].nid = acpi_get_node(handle); -#endif - return 0; -} - -int additional_cpus __initdata = -1; - -static __init int setup_additional_cpus(char *s) -{ - if (s) - additional_cpus = simple_strtol(s, NULL, 0); - - return 0; -} - -early_param("additional_cpus", setup_additional_cpus); - -/* - * cpu_possible_mask should be static, it cannot change as CPUs - * are onlined, or offlined. The reason is per-cpu data-structures - * are allocated by some modules at init time, and dont expect to - * do this dynamically on cpu arrival/departure. - * cpu_present_mask on the other hand can change dynamically. - * In case when cpu_hotplug is not compiled, then we resort to current - * behaviour, which is cpu_possible == cpu_present. - * - Ashok Raj - * - * Three ways to find out the number of additional hotplug CPUs: - * - If the BIOS specified disabled CPUs in ACPI/mptables use that. - * - The user can overwrite it with additional_cpus=NUM - * - Otherwise don't reserve additional CPUs. - */ -__init void prefill_possible_map(void) -{ - int i; - int possible, disabled_cpus; - - disabled_cpus = total_cpus - available_cpus; - - if (additional_cpus == -1) { - if (disabled_cpus > 0) - additional_cpus = disabled_cpus; - else - additional_cpus = 0; - } - - possible = available_cpus + additional_cpus; - - if (possible > nr_cpu_ids) - possible = nr_cpu_ids; - - printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n", - possible, max((possible - available_cpus), 0)); - - for (i = 0; i < possible; i++) - set_cpu_possible(i, true); -} - -static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu) -{ - int cpu; - - cpu = cpumask_first_zero(cpu_present_mask); - if (cpu >= nr_cpu_ids) - return -EINVAL; - - acpi_map_cpu2node(handle, cpu, physid); - - set_cpu_present(cpu, true); - ia64_cpu_to_sapicid[cpu] = physid; - - acpi_processor_set_pdc(handle); - - *pcpu = cpu; - return (0); -} - -/* wrapper to silence section mismatch warning */ -int __ref acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, - int *pcpu) -{ - return _acpi_map_lsapic(handle, physid, pcpu); -} -EXPORT_SYMBOL(acpi_map_cpu); - -int acpi_unmap_cpu(int cpu) -{ - ia64_cpu_to_sapicid[cpu] = -1; - set_cpu_present(cpu, false); - -#ifdef CONFIG_ACPI_NUMA - /* NUMA specific cleanup's */ -#endif - - return (0); -} -EXPORT_SYMBOL(acpi_unmap_cpu); -#endif /* CONFIG_ACPI_HOTPLUG_CPU */ - -#ifdef CONFIG_ACPI_NUMA -static acpi_status 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_madt_io_sapic *iosapic; - unsigned int gsi_base; - int 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)) { - kfree(buffer.pointer); - return AE_OK; - } - - iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer; - - if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) { - kfree(buffer.pointer); - return AE_OK; - } - - gsi_base = iosapic->global_irq_base; - - kfree(buffer.pointer); - - /* OK, it's an IOSAPIC MADT entry; associate it with a node */ - node = acpi_get_node(handle); - if (node == NUMA_NO_NODE || !node_online(node) || - cpumask_empty(cpumask_of_node(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 __ref 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); - -/* - * acpi_suspend_lowlevel() - save kernel state and suspend. - * - * TBD when IA64 starts to support suspend... - */ -int acpi_suspend_lowlevel(void) { return 0; } - -void acpi_proc_quirk_mwait_check(void) -{ -} |