diff options
Diffstat (limited to 'arch/ia64/kernel/acpi.c')
| -rw-r--r-- | arch/ia64/kernel/acpi.c | 1047 |
1 files changed, 1047 insertions, 0 deletions
diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c new file mode 100644 index 00000000..6f38b612 --- /dev/null +++ b/arch/ia64/kernel/acpi.c @@ -0,0 +1,1047 @@ +/* + * 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> + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * 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/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/machvec.h> +#include <asm/page.h> +#include <asm/numa.h> +#include <asm/sal.h> +#include <asm/cyclone.h> +#include <asm/xen/hypervisor.h> + +#define BAD_MADT_ENTRY(entry, end) ( \ + (!entry) || (unsigned long)entry + sizeof(*entry) > end || \ + ((struct acpi_subtable_header *)entry)->length < sizeof(*entry)) + +#define PREFIX "ACPI: " + +u32 acpi_rsdt_forced; +unsigned int acpi_cpei_override; +unsigned int acpi_cpei_phys_cpuid; + +unsigned long acpi_wakeup_address = 0; + +#ifdef CONFIG_IA64_GENERIC +static unsigned long __init acpi_find_rsdp(void) +{ + unsigned long rsdp_phys = 0; + + if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) + rsdp_phys = efi.acpi20; + else if (efi.acpi != EFI_INVALID_TABLE_ADDR) + printk(KERN_WARNING PREFIX + "v1.0/r0.71 tables no longer supported\n"); + return rsdp_phys; +} + +const char __init * +acpi_get_sysname(void) +{ + unsigned long rsdp_phys; + struct acpi_table_rsdp *rsdp; + struct acpi_table_xsdt *xsdt; + struct acpi_table_header *hdr; +#ifdef CONFIG_INTEL_IOMMU + u64 i, nentries; +#endif + + 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 acpi_table_rsdp *)__va(rsdp_phys); + if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) { + printk(KERN_ERR + "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n"); + return "dig"; + } + + xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address); + hdr = &xsdt->header; + if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 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")) { + if (!strcmp(hdr->oem_table_id + 4, "UV")) + return "uv"; + else + return "sn2"; + } else if (xen_pv_domain() && !strcmp(hdr->oem_id, "XEN")) { + return "xen"; + } + +#ifdef CONFIG_INTEL_IOMMU + /* Look for Intel IOMMU */ + nentries = (hdr->length - sizeof(*hdr)) / + sizeof(xsdt->table_offset_entry[0]); + for (i = 0; i < nentries; i++) { + hdr = __va(xsdt->table_offset_entry[i]); + if (strncmp(hdr->signature, ACPI_SIG_DMAR, + sizeof(ACPI_SIG_DMAR) - 1) == 0) + return "dig_vtd"; + } +#endif + + return "dig"; +} +#endif /* CONFIG_IA64_GENERIC */ + +#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 *__init __acpi_map_table(unsigned long phys_addr, unsigned long size) +{ + return __va(phys_addr); +} + +void __init __acpi_unmap_table(char *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(struct acpi_subtable_header * 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(struct acpi_subtable_header * 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(struct acpi_subtable_header * 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(struct acpi_subtable_header * 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(struct acpi_subtable_header * 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(struct acpi_subtable_header * 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(struct acpi_subtable_header * 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) +{ + if (!table) + return -EINVAL; + + 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 __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)) +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 (ia64_platform_is("sn2") || 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 (!ia64_platform_is("sn2") && 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; + cpu_set(srat_num_cpus, early_cpu_possible_map); + srat_num_cpus++; +} + +void __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; + + /* 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. + */ + 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++) + node_distance(i, j) = i == j ? LOCAL_DISTANCE : + REMOTE_DISTANCE; + return; + } + + 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); + node_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 +} +#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); +} + +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); +} + +static int __init acpi_parse_fadt(struct acpi_table_header *table) +{ + struct acpi_table_header *fadt_header; + struct acpi_table_fadt *fadt; + + if (!table) + return -EINVAL; + + 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"); + +#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) { + if (!ia64_platform_is("sn2")) + 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 +static __cpuinit +int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) +{ +#ifdef CONFIG_ACPI_NUMA + int pxm_id; + int nid; + + pxm_id = acpi_get_pxm(handle); + /* + * 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. + */ + nid = acpi_map_pxm_to_node(pxm_id); + node_cpuid[cpu].phys_id = physid; + node_cpuid[cpu].nid = nid; +#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 __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu) +{ + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; + union acpi_object *obj; + struct acpi_madt_local_sapic *lsapic; + cpumask_t tmp_map; + int cpu, physid; + + 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) + { + kfree(buffer.pointer); + return -EINVAL; + } + + lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer; + + if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) || + (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) { + kfree(buffer.pointer); + return -EINVAL; + } + + physid = ((lsapic->id << 8) | (lsapic->eid)); + + kfree(buffer.pointer); + buffer.length = ACPI_ALLOCATE_BUFFER; + buffer.pointer = NULL; + + cpumask_complement(&tmp_map, cpu_present_mask); + cpu = cpumask_first(&tmp_map); + 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_lsapic(acpi_handle handle, int *pcpu) +{ + return _acpi_map_lsapic(handle, pcpu); +} +EXPORT_SYMBOL(acpi_map_lsapic); + +int acpi_unmap_lsapic(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_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_madt_io_sapic *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)) { + 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, 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_node(pxm); + + if (node >= MAX_NUMNODES || !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 when IA64 starts to support suspend... + */ +int acpi_suspend_lowlevel(void) { return 0; } |