| /* |
| * Intel Multiprocessor Specification 1.1 and 1.4 |
| * compliant MP-table parsing routines. |
| * |
| * (c) 1995 Alan Cox, Building #3 <alan@redhat.com> |
| * (c) 1998, 1999, 2000 Ingo Molnar <mingo@redhat.com> |
| * |
| * Fixes |
| * Erich Boleyn : MP v1.4 and additional changes. |
| * Alan Cox : Added EBDA scanning |
| * Ingo Molnar : various cleanups and rewrites |
| * Maciej W. Rozycki: Bits for default MP configurations |
| * Paul Diefenbaugh: Added full ACPI support |
| */ |
| |
| #include <linux/mm.h> |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| #include <linux/bootmem.h> |
| #include <linux/kernel_stat.h> |
| #include <linux/mc146818rtc.h> |
| #include <linux/acpi.h> |
| #include <linux/module.h> |
| |
| #include <asm/smp.h> |
| #include <asm/mtrr.h> |
| #include <asm/mpspec.h> |
| #include <asm/pgalloc.h> |
| #include <asm/io_apic.h> |
| #include <asm/proto.h> |
| #include <asm/acpi.h> |
| |
| #include <mach_apic.h> |
| |
| /* Have we found an MP table */ |
| int smp_found_config; |
| unsigned int __cpuinitdata maxcpus = NR_CPUS; |
| |
| /* |
| * Various Linux-internal data structures created from the |
| * MP-table. |
| */ |
| DECLARE_BITMAP(mp_bus_not_pci, MAX_MP_BUSSES); |
| int mp_bus_id_to_pci_bus[MAX_MP_BUSSES] = {[0 ... MAX_MP_BUSSES - 1] = -1 }; |
| |
| static int mp_current_pci_id = 0; |
| /* I/O APIC entries */ |
| struct mpc_config_ioapic mp_ioapics[MAX_IO_APICS]; |
| |
| /* # of MP IRQ source entries */ |
| struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES]; |
| |
| /* MP IRQ source entries */ |
| int mp_irq_entries; |
| |
| int nr_ioapics; |
| unsigned long mp_lapic_addr = 0; |
| |
| /* Processor that is doing the boot up */ |
| unsigned int boot_cpu_physical_apicid = -1U; |
| EXPORT_SYMBOL(boot_cpu_physical_apicid); |
| |
| /* Internal processor count */ |
| unsigned int num_processors; |
| |
| unsigned disabled_cpus __cpuinitdata; |
| |
| /* Bitmask of physically existing CPUs */ |
| physid_mask_t phys_cpu_present_map = PHYSID_MASK_NONE; |
| |
| u16 x86_bios_cpu_apicid_init[NR_CPUS] __initdata |
| = {[0 ... NR_CPUS - 1] = BAD_APICID }; |
| void *x86_bios_cpu_apicid_early_ptr; |
| DEFINE_PER_CPU(u16, x86_bios_cpu_apicid) = BAD_APICID; |
| EXPORT_PER_CPU_SYMBOL(x86_bios_cpu_apicid); |
| |
| /* |
| * Intel MP BIOS table parsing routines: |
| */ |
| |
| /* |
| * Checksum an MP configuration block. |
| */ |
| |
| static int __init mpf_checksum(unsigned char *mp, int len) |
| { |
| int sum = 0; |
| |
| while (len--) |
| sum += *mp++; |
| |
| return sum & 0xFF; |
| } |
| |
| static void __cpuinit MP_processor_info(struct mpc_config_processor *m) |
| { |
| int cpu; |
| cpumask_t tmp_map; |
| char *bootup_cpu = ""; |
| |
| if (!(m->mpc_cpuflag & CPU_ENABLED)) { |
| disabled_cpus++; |
| return; |
| } |
| if (m->mpc_cpuflag & CPU_BOOTPROCESSOR) { |
| bootup_cpu = " (Bootup-CPU)"; |
| boot_cpu_physical_apicid = m->mpc_apicid; |
| } |
| |
| printk(KERN_INFO "Processor #%d%s\n", m->mpc_apicid, bootup_cpu); |
| |
| if (num_processors >= NR_CPUS) { |
| printk(KERN_WARNING "WARNING: NR_CPUS limit of %i reached." |
| " Processor ignored.\n", NR_CPUS); |
| return; |
| } |
| |
| if (num_processors >= maxcpus) { |
| printk(KERN_WARNING "WARNING: maxcpus limit of %i reached." |
| " Processor ignored.\n", maxcpus); |
| return; |
| } |
| |
| num_processors++; |
| cpus_complement(tmp_map, cpu_present_map); |
| cpu = first_cpu(tmp_map); |
| |
| physid_set(m->mpc_apicid, phys_cpu_present_map); |
| if (m->mpc_cpuflag & CPU_BOOTPROCESSOR) { |
| /* |
| * x86_bios_cpu_apicid is required to have processors listed |
| * in same order as logical cpu numbers. Hence the first |
| * entry is BSP, and so on. |
| */ |
| cpu = 0; |
| } |
| /* are we being called early in kernel startup? */ |
| if (x86_cpu_to_apicid_early_ptr) { |
| u16 *cpu_to_apicid = x86_cpu_to_apicid_early_ptr; |
| u16 *bios_cpu_apicid = x86_bios_cpu_apicid_early_ptr; |
| |
| cpu_to_apicid[cpu] = m->mpc_apicid; |
| bios_cpu_apicid[cpu] = m->mpc_apicid; |
| } else { |
| per_cpu(x86_cpu_to_apicid, cpu) = m->mpc_apicid; |
| per_cpu(x86_bios_cpu_apicid, cpu) = m->mpc_apicid; |
| } |
| |
| cpu_set(cpu, cpu_possible_map); |
| cpu_set(cpu, cpu_present_map); |
| } |
| |
| static void __init MP_bus_info(struct mpc_config_bus *m) |
| { |
| char str[7]; |
| |
| memcpy(str, m->mpc_bustype, 6); |
| str[6] = 0; |
| Dprintk("Bus #%d is %s\n", m->mpc_busid, str); |
| |
| if (strncmp(str, "ISA", 3) == 0) { |
| set_bit(m->mpc_busid, mp_bus_not_pci); |
| } else if (strncmp(str, "PCI", 3) == 0) { |
| clear_bit(m->mpc_busid, mp_bus_not_pci); |
| mp_bus_id_to_pci_bus[m->mpc_busid] = mp_current_pci_id; |
| mp_current_pci_id++; |
| } else { |
| printk(KERN_ERR "Unknown bustype %s\n", str); |
| } |
| } |
| |
| static int bad_ioapic(unsigned long address) |
| { |
| if (nr_ioapics >= MAX_IO_APICS) { |
| printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded " |
| "(found %d)\n", MAX_IO_APICS, nr_ioapics); |
| panic("Recompile kernel with bigger MAX_IO_APICS!\n"); |
| } |
| if (!address) { |
| printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address" |
| " found in table, skipping!\n"); |
| return 1; |
| } |
| return 0; |
| } |
| |
| static void __init MP_ioapic_info(struct mpc_config_ioapic *m) |
| { |
| if (!(m->mpc_flags & MPC_APIC_USABLE)) |
| return; |
| |
| printk(KERN_INFO "I/O APIC #%d at 0x%X.\n", m->mpc_apicid, |
| m->mpc_apicaddr); |
| |
| if (bad_ioapic(m->mpc_apicaddr)) |
| return; |
| |
| mp_ioapics[nr_ioapics] = *m; |
| nr_ioapics++; |
| } |
| |
| static void __init MP_intsrc_info(struct mpc_config_intsrc *m) |
| { |
| mp_irqs[mp_irq_entries] = *m; |
| Dprintk("Int: type %d, pol %d, trig %d, bus %d," |
| " IRQ %02x, APIC ID %x, APIC INT %02x\n", |
| m->mpc_irqtype, m->mpc_irqflag & 3, |
| (m->mpc_irqflag >> 2) & 3, m->mpc_srcbus, |
| m->mpc_srcbusirq, m->mpc_dstapic, m->mpc_dstirq); |
| if (++mp_irq_entries >= MAX_IRQ_SOURCES) |
| panic("Max # of irq sources exceeded!!\n"); |
| } |
| |
| static void __init MP_lintsrc_info(struct mpc_config_lintsrc *m) |
| { |
| Dprintk("Lint: type %d, pol %d, trig %d, bus %d," |
| " IRQ %02x, APIC ID %x, APIC LINT %02x\n", |
| m->mpc_irqtype, m->mpc_irqflag & 3, |
| (m->mpc_irqflag >> 2) & 3, m->mpc_srcbusid, |
| m->mpc_srcbusirq, m->mpc_destapic, m->mpc_destapiclint); |
| } |
| |
| /* |
| * Read/parse the MPC |
| */ |
| static int __init smp_read_mpc(struct mp_config_table *mpc, unsigned early) |
| { |
| char str[16]; |
| int count = sizeof(*mpc); |
| unsigned char *mpt = ((unsigned char *)mpc) + count; |
| |
| if (memcmp(mpc->mpc_signature, MPC_SIGNATURE, 4)) { |
| printk(KERN_ERR "MPTABLE: bad signature [%c%c%c%c]!\n", |
| mpc->mpc_signature[0], |
| mpc->mpc_signature[1], |
| mpc->mpc_signature[2], mpc->mpc_signature[3]); |
| return 0; |
| } |
| if (mpf_checksum((unsigned char *)mpc, mpc->mpc_length)) { |
| printk(KERN_ERR "MPTABLE: checksum error!\n"); |
| return 0; |
| } |
| if (mpc->mpc_spec != 0x01 && mpc->mpc_spec != 0x04) { |
| printk(KERN_ERR "MPTABLE: bad table version (%d)!!\n", |
| mpc->mpc_spec); |
| return 0; |
| } |
| if (!mpc->mpc_lapic) { |
| printk(KERN_ERR "MPTABLE: null local APIC address!\n"); |
| return 0; |
| } |
| memcpy(str, mpc->mpc_oem, 8); |
| str[8] = 0; |
| printk(KERN_INFO "MPTABLE: OEM ID: %s ", str); |
| |
| memcpy(str, mpc->mpc_productid, 12); |
| str[12] = 0; |
| printk(KERN_INFO "MPTABLE: Product ID: %s ", str); |
| |
| printk(KERN_INFO "MPTABLE: APIC at: 0x%X\n", mpc->mpc_lapic); |
| |
| /* save the local APIC address, it might be non-default */ |
| if (!acpi_lapic) |
| mp_lapic_addr = mpc->mpc_lapic; |
| |
| if (early) |
| return 1; |
| |
| /* |
| * Now process the configuration blocks. |
| */ |
| while (count < mpc->mpc_length) { |
| switch (*mpt) { |
| case MP_PROCESSOR: |
| { |
| struct mpc_config_processor *m = |
| (struct mpc_config_processor *)mpt; |
| if (!acpi_lapic) |
| MP_processor_info(m); |
| mpt += sizeof(*m); |
| count += sizeof(*m); |
| break; |
| } |
| case MP_BUS: |
| { |
| struct mpc_config_bus *m = |
| (struct mpc_config_bus *)mpt; |
| MP_bus_info(m); |
| mpt += sizeof(*m); |
| count += sizeof(*m); |
| break; |
| } |
| case MP_IOAPIC: |
| { |
| struct mpc_config_ioapic *m = |
| (struct mpc_config_ioapic *)mpt; |
| MP_ioapic_info(m); |
| mpt += sizeof(*m); |
| count += sizeof(*m); |
| break; |
| } |
| case MP_INTSRC: |
| { |
| struct mpc_config_intsrc *m = |
| (struct mpc_config_intsrc *)mpt; |
| |
| MP_intsrc_info(m); |
| mpt += sizeof(*m); |
| count += sizeof(*m); |
| break; |
| } |
| case MP_LINTSRC: |
| { |
| struct mpc_config_lintsrc *m = |
| (struct mpc_config_lintsrc *)mpt; |
| MP_lintsrc_info(m); |
| mpt += sizeof(*m); |
| count += sizeof(*m); |
| break; |
| } |
| } |
| } |
| setup_apic_routing(); |
| if (!num_processors) |
| printk(KERN_ERR "MPTABLE: no processors registered!\n"); |
| return num_processors; |
| } |
| |
| static int __init ELCR_trigger(unsigned int irq) |
| { |
| unsigned int port; |
| |
| port = 0x4d0 + (irq >> 3); |
| return (inb(port) >> (irq & 7)) & 1; |
| } |
| |
| static void __init construct_default_ioirq_mptable(int mpc_default_type) |
| { |
| struct mpc_config_intsrc intsrc; |
| int i; |
| int ELCR_fallback = 0; |
| |
| intsrc.mpc_type = MP_INTSRC; |
| intsrc.mpc_irqflag = 0; /* conforming */ |
| intsrc.mpc_srcbus = 0; |
| intsrc.mpc_dstapic = mp_ioapics[0].mpc_apicid; |
| |
| intsrc.mpc_irqtype = mp_INT; |
| |
| /* |
| * If true, we have an ISA/PCI system with no IRQ entries |
| * in the MP table. To prevent the PCI interrupts from being set up |
| * incorrectly, we try to use the ELCR. The sanity check to see if |
| * there is good ELCR data is very simple - IRQ0, 1, 2 and 13 can |
| * never be level sensitive, so we simply see if the ELCR agrees. |
| * If it does, we assume it's valid. |
| */ |
| if (mpc_default_type == 5) { |
| printk(KERN_INFO "ISA/PCI bus type with no IRQ information... " |
| "falling back to ELCR\n"); |
| |
| if (ELCR_trigger(0) || ELCR_trigger(1) || ELCR_trigger(2) || |
| ELCR_trigger(13)) |
| printk(KERN_ERR "ELCR contains invalid data... " |
| "not using ELCR\n"); |
| else { |
| printk(KERN_INFO |
| "Using ELCR to identify PCI interrupts\n"); |
| ELCR_fallback = 1; |
| } |
| } |
| |
| for (i = 0; i < 16; i++) { |
| switch (mpc_default_type) { |
| case 2: |
| if (i == 0 || i == 13) |
| continue; /* IRQ0 & IRQ13 not connected */ |
| /* fall through */ |
| default: |
| if (i == 2) |
| continue; /* IRQ2 is never connected */ |
| } |
| |
| if (ELCR_fallback) { |
| /* |
| * If the ELCR indicates a level-sensitive interrupt, we |
| * copy that information over to the MP table in the |
| * irqflag field (level sensitive, active high polarity). |
| */ |
| if (ELCR_trigger(i)) |
| intsrc.mpc_irqflag = 13; |
| else |
| intsrc.mpc_irqflag = 0; |
| } |
| |
| intsrc.mpc_srcbusirq = i; |
| intsrc.mpc_dstirq = i ? i : 2; /* IRQ0 to INTIN2 */ |
| MP_intsrc_info(&intsrc); |
| } |
| |
| intsrc.mpc_irqtype = mp_ExtINT; |
| intsrc.mpc_srcbusirq = 0; |
| intsrc.mpc_dstirq = 0; /* 8259A to INTIN0 */ |
| MP_intsrc_info(&intsrc); |
| } |
| |
| static inline void __init construct_default_ISA_mptable(int mpc_default_type) |
| { |
| struct mpc_config_processor processor; |
| struct mpc_config_bus bus; |
| struct mpc_config_ioapic ioapic; |
| struct mpc_config_lintsrc lintsrc; |
| int linttypes[2] = { mp_ExtINT, mp_NMI }; |
| int i; |
| |
| /* |
| * local APIC has default address |
| */ |
| mp_lapic_addr = APIC_DEFAULT_PHYS_BASE; |
| |
| /* |
| * 2 CPUs, numbered 0 & 1. |
| */ |
| processor.mpc_type = MP_PROCESSOR; |
| processor.mpc_apicver = 0; |
| processor.mpc_cpuflag = CPU_ENABLED; |
| processor.mpc_cpufeature = 0; |
| processor.mpc_featureflag = 0; |
| processor.mpc_reserved[0] = 0; |
| processor.mpc_reserved[1] = 0; |
| for (i = 0; i < 2; i++) { |
| processor.mpc_apicid = i; |
| MP_processor_info(&processor); |
| } |
| |
| bus.mpc_type = MP_BUS; |
| bus.mpc_busid = 0; |
| switch (mpc_default_type) { |
| default: |
| printk(KERN_ERR "???\nUnknown standard configuration %d\n", |
| mpc_default_type); |
| /* fall through */ |
| case 1: |
| case 5: |
| memcpy(bus.mpc_bustype, "ISA ", 6); |
| break; |
| } |
| MP_bus_info(&bus); |
| if (mpc_default_type > 4) { |
| bus.mpc_busid = 1; |
| memcpy(bus.mpc_bustype, "PCI ", 6); |
| MP_bus_info(&bus); |
| } |
| |
| ioapic.mpc_type = MP_IOAPIC; |
| ioapic.mpc_apicid = 2; |
| ioapic.mpc_apicver = 0; |
| ioapic.mpc_flags = MPC_APIC_USABLE; |
| ioapic.mpc_apicaddr = 0xFEC00000; |
| MP_ioapic_info(&ioapic); |
| |
| /* |
| * We set up most of the low 16 IO-APIC pins according to MPS rules. |
| */ |
| construct_default_ioirq_mptable(mpc_default_type); |
| |
| lintsrc.mpc_type = MP_LINTSRC; |
| lintsrc.mpc_irqflag = 0; /* conforming */ |
| lintsrc.mpc_srcbusid = 0; |
| lintsrc.mpc_srcbusirq = 0; |
| lintsrc.mpc_destapic = MP_APIC_ALL; |
| for (i = 0; i < 2; i++) { |
| lintsrc.mpc_irqtype = linttypes[i]; |
| lintsrc.mpc_destapiclint = i; |
| MP_lintsrc_info(&lintsrc); |
| } |
| } |
| |
| static struct intel_mp_floating *mpf_found; |
| |
| /* |
| * Scan the memory blocks for an SMP configuration block. |
| */ |
| static void __init __get_smp_config(unsigned early) |
| { |
| struct intel_mp_floating *mpf = mpf_found; |
| |
| if (acpi_lapic && early) |
| return; |
| /* |
| * ACPI supports both logical (e.g. Hyper-Threading) and physical |
| * processors, where MPS only supports physical. |
| */ |
| if (acpi_lapic && acpi_ioapic) { |
| printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " |
| "information\n"); |
| return; |
| } else if (acpi_lapic) |
| printk(KERN_INFO "Using ACPI for processor (LAPIC) " |
| "configuration information\n"); |
| |
| printk(KERN_INFO "Intel MultiProcessor Specification v1.%d\n", |
| mpf->mpf_specification); |
| |
| /* |
| * Now see if we need to read further. |
| */ |
| if (mpf->mpf_feature1 != 0) { |
| if (early) { |
| /* |
| * local APIC has default address |
| */ |
| mp_lapic_addr = APIC_DEFAULT_PHYS_BASE; |
| return; |
| } |
| |
| printk(KERN_INFO "Default MP configuration #%d\n", |
| mpf->mpf_feature1); |
| construct_default_ISA_mptable(mpf->mpf_feature1); |
| |
| } else if (mpf->mpf_physptr) { |
| |
| /* |
| * Read the physical hardware table. Anything here will |
| * override the defaults. |
| */ |
| if (!smp_read_mpc(phys_to_virt(mpf->mpf_physptr), early)) { |
| smp_found_config = 0; |
| printk(KERN_ERR |
| "BIOS bug, MP table errors detected!...\n"); |
| printk(KERN_ERR "... disabling SMP support. " |
| "(tell your hw vendor)\n"); |
| return; |
| } |
| |
| if (early) |
| return; |
| /* |
| * If there are no explicit MP IRQ entries, then we are |
| * broken. We set up most of the low 16 IO-APIC pins to |
| * ISA defaults and hope it will work. |
| */ |
| if (!mp_irq_entries) { |
| struct mpc_config_bus bus; |
| |
| printk(KERN_ERR "BIOS bug, no explicit IRQ entries, " |
| "using default mptable. " |
| "(tell your hw vendor)\n"); |
| |
| bus.mpc_type = MP_BUS; |
| bus.mpc_busid = 0; |
| memcpy(bus.mpc_bustype, "ISA ", 6); |
| MP_bus_info(&bus); |
| |
| construct_default_ioirq_mptable(0); |
| } |
| |
| } else |
| BUG(); |
| |
| if (!early) |
| printk(KERN_INFO "Processors: %d\n", num_processors); |
| /* |
| * Only use the first configuration found. |
| */ |
| } |
| |
| void __init early_get_smp_config(void) |
| { |
| __get_smp_config(1); |
| } |
| |
| void __init get_smp_config(void) |
| { |
| __get_smp_config(0); |
| } |
| |
| static int __init smp_scan_config(unsigned long base, unsigned long length, |
| unsigned reserve) |
| { |
| extern void __bad_mpf_size(void); |
| unsigned int *bp = phys_to_virt(base); |
| struct intel_mp_floating *mpf; |
| |
| Dprintk("Scan SMP from %p for %ld bytes.\n", bp, length); |
| if (sizeof(*mpf) != 16) |
| __bad_mpf_size(); |
| |
| while (length > 0) { |
| mpf = (struct intel_mp_floating *)bp; |
| if ((*bp == SMP_MAGIC_IDENT) && |
| (mpf->mpf_length == 1) && |
| !mpf_checksum((unsigned char *)bp, 16) && |
| ((mpf->mpf_specification == 1) |
| || (mpf->mpf_specification == 4))) { |
| |
| smp_found_config = 1; |
| mpf_found = mpf; |
| |
| if (!reserve) |
| return 1; |
| |
| reserve_bootmem_generic(virt_to_phys(mpf), PAGE_SIZE); |
| if (mpf->mpf_physptr) |
| reserve_bootmem_generic(mpf->mpf_physptr, |
| PAGE_SIZE); |
| return 1; |
| } |
| bp += 4; |
| length -= 16; |
| } |
| return 0; |
| } |
| |
| static void __init __find_smp_config(unsigned reserve) |
| { |
| unsigned int address; |
| |
| /* |
| * FIXME: Linux assumes you have 640K of base ram.. |
| * this continues the error... |
| * |
| * 1) Scan the bottom 1K for a signature |
| * 2) Scan the top 1K of base RAM |
| * 3) Scan the 64K of bios |
| */ |
| if (smp_scan_config(0x0, 0x400, reserve) || |
| smp_scan_config(639 * 0x400, 0x400, reserve) || |
| smp_scan_config(0xF0000, 0x10000, reserve)) |
| return; |
| /* |
| * If it is an SMP machine we should know now. |
| * |
| * there is a real-mode segmented pointer pointing to the |
| * 4K EBDA area at 0x40E, calculate and scan it here. |
| * |
| * NOTE! There are Linux loaders that will corrupt the EBDA |
| * area, and as such this kind of SMP config may be less |
| * trustworthy, simply because the SMP table may have been |
| * stomped on during early boot. These loaders are buggy and |
| * should be fixed. |
| */ |
| |
| address = *(unsigned short *)phys_to_virt(0x40E); |
| address <<= 4; |
| if (smp_scan_config(address, 0x1000, reserve)) |
| return; |
| |
| /* If we have come this far, we did not find an MP table */ |
| printk(KERN_INFO "No mptable found.\n"); |
| } |
| |
| void __init early_find_smp_config(void) |
| { |
| __find_smp_config(0); |
| } |
| |
| void __init find_smp_config(void) |
| { |
| __find_smp_config(1); |
| } |
| |
| /* -------------------------------------------------------------------------- |
| ACPI-based MP Configuration |
| -------------------------------------------------------------------------- */ |
| |
| #ifdef CONFIG_ACPI |
| |
| void __init mp_register_lapic_address(u64 address) |
| { |
| mp_lapic_addr = (unsigned long)address; |
| set_fixmap_nocache(FIX_APIC_BASE, mp_lapic_addr); |
| if (boot_cpu_physical_apicid == -1U) |
| boot_cpu_physical_apicid = GET_APIC_ID(apic_read(APIC_ID)); |
| } |
| |
| void __cpuinit mp_register_lapic(u8 id, u8 enabled) |
| { |
| struct mpc_config_processor processor; |
| int boot_cpu = 0; |
| |
| if (id == boot_cpu_physical_apicid) |
| boot_cpu = 1; |
| |
| processor.mpc_type = MP_PROCESSOR; |
| processor.mpc_apicid = id; |
| processor.mpc_apicver = 0; |
| processor.mpc_cpuflag = (enabled ? CPU_ENABLED : 0); |
| processor.mpc_cpuflag |= (boot_cpu ? CPU_BOOTPROCESSOR : 0); |
| processor.mpc_cpufeature = 0; |
| processor.mpc_featureflag = 0; |
| processor.mpc_reserved[0] = 0; |
| processor.mpc_reserved[1] = 0; |
| |
| MP_processor_info(&processor); |
| } |
| |
| #define MP_ISA_BUS 0 |
| #define MP_MAX_IOAPIC_PIN 127 |
| |
| static struct mp_ioapic_routing { |
| int apic_id; |
| int gsi_start; |
| int gsi_end; |
| u32 pin_programmed[4]; |
| } mp_ioapic_routing[MAX_IO_APICS]; |
| |
| static int mp_find_ioapic(int gsi) |
| { |
| int i = 0; |
| |
| /* Find the IOAPIC that manages this GSI. */ |
| for (i = 0; i < nr_ioapics; i++) { |
| if ((gsi >= mp_ioapic_routing[i].gsi_start) |
| && (gsi <= mp_ioapic_routing[i].gsi_end)) |
| return i; |
| } |
| |
| printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi); |
| return -1; |
| } |
| |
| static u8 uniq_ioapic_id(u8 id) |
| { |
| int i; |
| DECLARE_BITMAP(used, 256); |
| bitmap_zero(used, 256); |
| for (i = 0; i < nr_ioapics; i++) { |
| struct mpc_config_ioapic *ia = &mp_ioapics[i]; |
| __set_bit(ia->mpc_apicid, used); |
| } |
| if (!test_bit(id, used)) |
| return id; |
| return find_first_zero_bit(used, 256); |
| } |
| |
| void __init mp_register_ioapic(u8 id, u32 address, u32 gsi_base) |
| { |
| int idx = 0; |
| |
| if (bad_ioapic(address)) |
| return; |
| |
| idx = nr_ioapics; |
| |
| mp_ioapics[idx].mpc_type = MP_IOAPIC; |
| mp_ioapics[idx].mpc_flags = MPC_APIC_USABLE; |
| mp_ioapics[idx].mpc_apicaddr = address; |
| |
| set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address); |
| mp_ioapics[idx].mpc_apicid = uniq_ioapic_id(id); |
| mp_ioapics[idx].mpc_apicver = 0; |
| |
| /* |
| * Build basic IRQ lookup table to facilitate gsi->io_apic lookups |
| * and to prevent reprogramming of IOAPIC pins (PCI IRQs). |
| */ |
| mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mpc_apicid; |
| mp_ioapic_routing[idx].gsi_start = gsi_base; |
| mp_ioapic_routing[idx].gsi_end = gsi_base + |
| io_apic_get_redir_entries(idx); |
| |
| printk(KERN_INFO "IOAPIC[%d]: apic_id %d, address 0x%x, " |
| "GSI %d-%d\n", idx, mp_ioapics[idx].mpc_apicid, |
| mp_ioapics[idx].mpc_apicaddr, |
| mp_ioapic_routing[idx].gsi_start, |
| mp_ioapic_routing[idx].gsi_end); |
| |
| nr_ioapics++; |
| } |
| |
| void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi) |
| { |
| struct mpc_config_intsrc intsrc; |
| int ioapic = -1; |
| int pin = -1; |
| |
| /* |
| * Convert 'gsi' to 'ioapic.pin'. |
| */ |
| ioapic = mp_find_ioapic(gsi); |
| if (ioapic < 0) |
| return; |
| pin = gsi - mp_ioapic_routing[ioapic].gsi_start; |
| |
| /* |
| * TBD: This check is for faulty timer entries, where the override |
| * erroneously sets the trigger to level, resulting in a HUGE |
| * increase of timer interrupts! |
| */ |
| if ((bus_irq == 0) && (trigger == 3)) |
| trigger = 1; |
| |
| intsrc.mpc_type = MP_INTSRC; |
| intsrc.mpc_irqtype = mp_INT; |
| intsrc.mpc_irqflag = (trigger << 2) | polarity; |
| intsrc.mpc_srcbus = MP_ISA_BUS; |
| intsrc.mpc_srcbusirq = bus_irq; /* IRQ */ |
| intsrc.mpc_dstapic = mp_ioapics[ioapic].mpc_apicid; /* APIC ID */ |
| intsrc.mpc_dstirq = pin; /* INTIN# */ |
| |
| Dprintk("Int: type %d, pol %d, trig %d, bus %d, irq %d, %d-%d\n", |
| intsrc.mpc_irqtype, intsrc.mpc_irqflag & 3, |
| (intsrc.mpc_irqflag >> 2) & 3, intsrc.mpc_srcbus, |
| intsrc.mpc_srcbusirq, intsrc.mpc_dstapic, intsrc.mpc_dstirq); |
| |
| mp_irqs[mp_irq_entries] = intsrc; |
| if (++mp_irq_entries == MAX_IRQ_SOURCES) |
| panic("Max # of irq sources exceeded!\n"); |
| } |
| |
| void __init mp_config_acpi_legacy_irqs(void) |
| { |
| struct mpc_config_intsrc intsrc; |
| int i = 0; |
| int ioapic = -1; |
| |
| /* |
| * Fabricate the legacy ISA bus (bus #31). |
| */ |
| set_bit(MP_ISA_BUS, mp_bus_not_pci); |
| |
| /* |
| * Locate the IOAPIC that manages the ISA IRQs (0-15). |
| */ |
| ioapic = mp_find_ioapic(0); |
| if (ioapic < 0) |
| return; |
| |
| intsrc.mpc_type = MP_INTSRC; |
| intsrc.mpc_irqflag = 0; /* Conforming */ |
| intsrc.mpc_srcbus = MP_ISA_BUS; |
| intsrc.mpc_dstapic = mp_ioapics[ioapic].mpc_apicid; |
| |
| /* |
| * Use the default configuration for the IRQs 0-15. Unless |
| * overridden by (MADT) interrupt source override entries. |
| */ |
| for (i = 0; i < 16; i++) { |
| int idx; |
| |
| for (idx = 0; idx < mp_irq_entries; idx++) { |
| struct mpc_config_intsrc *irq = mp_irqs + idx; |
| |
| /* Do we already have a mapping for this ISA IRQ? */ |
| if (irq->mpc_srcbus == MP_ISA_BUS |
| && irq->mpc_srcbusirq == i) |
| break; |
| |
| /* Do we already have a mapping for this IOAPIC pin */ |
| if ((irq->mpc_dstapic == intsrc.mpc_dstapic) && |
| (irq->mpc_dstirq == i)) |
| break; |
| } |
| |
| if (idx != mp_irq_entries) { |
| printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); |
| continue; /* IRQ already used */ |
| } |
| |
| intsrc.mpc_irqtype = mp_INT; |
| intsrc.mpc_srcbusirq = i; /* Identity mapped */ |
| intsrc.mpc_dstirq = i; |
| |
| Dprintk("Int: type %d, pol %d, trig %d, bus %d, irq %d, " |
| "%d-%d\n", intsrc.mpc_irqtype, intsrc.mpc_irqflag & 3, |
| (intsrc.mpc_irqflag >> 2) & 3, intsrc.mpc_srcbus, |
| intsrc.mpc_srcbusirq, intsrc.mpc_dstapic, |
| intsrc.mpc_dstirq); |
| |
| mp_irqs[mp_irq_entries] = intsrc; |
| if (++mp_irq_entries == MAX_IRQ_SOURCES) |
| panic("Max # of irq sources exceeded!\n"); |
| } |
| } |
| |
| int mp_register_gsi(u32 gsi, int triggering, int polarity) |
| { |
| int ioapic = -1; |
| int ioapic_pin = 0; |
| int idx, bit = 0; |
| |
| if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) |
| return gsi; |
| |
| /* Don't set up the ACPI SCI because it's already set up */ |
| if (acpi_gbl_FADT.sci_interrupt == gsi) |
| return gsi; |
| |
| ioapic = mp_find_ioapic(gsi); |
| if (ioapic < 0) { |
| printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi); |
| return gsi; |
| } |
| |
| ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_start; |
| |
| /* |
| * Avoid pin reprogramming. PRTs typically include entries |
| * with redundant pin->gsi mappings (but unique PCI devices); |
| * we only program the IOAPIC on the first. |
| */ |
| bit = ioapic_pin % 32; |
| idx = (ioapic_pin < 32) ? 0 : (ioapic_pin / 32); |
| if (idx > 3) { |
| printk(KERN_ERR "Invalid reference to IOAPIC pin " |
| "%d-%d\n", mp_ioapic_routing[ioapic].apic_id, |
| ioapic_pin); |
| return gsi; |
| } |
| if ((1 << bit) & mp_ioapic_routing[ioapic].pin_programmed[idx]) { |
| Dprintk(KERN_DEBUG "Pin %d-%d already programmed\n", |
| mp_ioapic_routing[ioapic].apic_id, ioapic_pin); |
| return gsi; |
| } |
| |
| mp_ioapic_routing[ioapic].pin_programmed[idx] |= (1 << bit); |
| |
| io_apic_set_pci_routing(ioapic, ioapic_pin, gsi, |
| triggering == ACPI_EDGE_SENSITIVE ? 0 : 1, |
| polarity == ACPI_ACTIVE_HIGH ? 0 : 1); |
| return gsi; |
| } |
| #endif /* CONFIG_ACPI */ |