diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/x86/kernel/apic/probe_32.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/x86/kernel/apic/probe_32.c | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/ANDROID_3.4.5/arch/x86/kernel/apic/probe_32.c b/ANDROID_3.4.5/arch/x86/kernel/apic/probe_32.c new file mode 100644 index 00000000..ff2c1b9a --- /dev/null +++ b/ANDROID_3.4.5/arch/x86/kernel/apic/probe_32.c @@ -0,0 +1,271 @@ +/* + * Default generic APIC driver. This handles up to 8 CPUs. + * + * Copyright 2003 Andi Kleen, SuSE Labs. + * Subject to the GNU Public License, v.2 + * + * Generic x86 APIC driver probe layer. + */ +#include <linux/threads.h> +#include <linux/cpumask.h> +#include <linux/module.h> +#include <linux/string.h> +#include <linux/kernel.h> +#include <linux/ctype.h> +#include <linux/init.h> +#include <linux/errno.h> +#include <asm/fixmap.h> +#include <asm/mpspec.h> +#include <asm/apicdef.h> +#include <asm/apic.h> +#include <asm/setup.h> + +#include <linux/smp.h> +#include <asm/ipi.h> + +#include <linux/interrupt.h> +#include <asm/acpi.h> +#include <asm/e820.h> + +#ifdef CONFIG_HOTPLUG_CPU +#define DEFAULT_SEND_IPI (1) +#else +#define DEFAULT_SEND_IPI (0) +#endif + +int no_broadcast = DEFAULT_SEND_IPI; + +static __init int no_ipi_broadcast(char *str) +{ + get_option(&str, &no_broadcast); + pr_info("Using %s mode\n", + no_broadcast ? "No IPI Broadcast" : "IPI Broadcast"); + return 1; +} +__setup("no_ipi_broadcast=", no_ipi_broadcast); + +static int __init print_ipi_mode(void) +{ + pr_info("Using IPI %s mode\n", + no_broadcast ? "No-Shortcut" : "Shortcut"); + return 0; +} +late_initcall(print_ipi_mode); + +static int default_x86_32_early_logical_apicid(int cpu) +{ + return 1 << cpu; +} + +static void setup_apic_flat_routing(void) +{ +#ifdef CONFIG_X86_IO_APIC + printk(KERN_INFO + "Enabling APIC mode: Flat. Using %d I/O APICs\n", + nr_ioapics); +#endif +} + +static void default_vector_allocation_domain(int cpu, struct cpumask *retmask) +{ + /* + * Careful. Some cpus do not strictly honor the set of cpus + * specified in the interrupt destination when using lowest + * priority interrupt delivery mode. + * + * In particular there was a hyperthreading cpu observed to + * deliver interrupts to the wrong hyperthread when only one + * hyperthread was specified in the interrupt desitination. + */ + cpumask_clear(retmask); + cpumask_bits(retmask)[0] = APIC_ALL_CPUS; +} + +/* should be called last. */ +static int probe_default(void) +{ + return 1; +} + +static struct apic apic_default = { + + .name = "default", + .probe = probe_default, + .acpi_madt_oem_check = NULL, + .apic_id_valid = default_apic_id_valid, + .apic_id_registered = default_apic_id_registered, + + .irq_delivery_mode = dest_LowestPrio, + /* logical delivery broadcast to all CPUs: */ + .irq_dest_mode = 1, + + .target_cpus = default_target_cpus, + .disable_esr = 0, + .dest_logical = APIC_DEST_LOGICAL, + .check_apicid_used = default_check_apicid_used, + .check_apicid_present = default_check_apicid_present, + + .vector_allocation_domain = default_vector_allocation_domain, + .init_apic_ldr = default_init_apic_ldr, + + .ioapic_phys_id_map = default_ioapic_phys_id_map, + .setup_apic_routing = setup_apic_flat_routing, + .multi_timer_check = NULL, + .cpu_present_to_apicid = default_cpu_present_to_apicid, + .apicid_to_cpu_present = physid_set_mask_of_physid, + .setup_portio_remap = NULL, + .check_phys_apicid_present = default_check_phys_apicid_present, + .enable_apic_mode = NULL, + .phys_pkg_id = default_phys_pkg_id, + .mps_oem_check = NULL, + + .get_apic_id = default_get_apic_id, + .set_apic_id = NULL, + .apic_id_mask = 0x0F << 24, + + .cpu_mask_to_apicid = default_cpu_mask_to_apicid, + .cpu_mask_to_apicid_and = default_cpu_mask_to_apicid_and, + + .send_IPI_mask = default_send_IPI_mask_logical, + .send_IPI_mask_allbutself = default_send_IPI_mask_allbutself_logical, + .send_IPI_allbutself = default_send_IPI_allbutself, + .send_IPI_all = default_send_IPI_all, + .send_IPI_self = default_send_IPI_self, + + .trampoline_phys_low = DEFAULT_TRAMPOLINE_PHYS_LOW, + .trampoline_phys_high = DEFAULT_TRAMPOLINE_PHYS_HIGH, + + .wait_for_init_deassert = default_wait_for_init_deassert, + + .smp_callin_clear_local_apic = NULL, + .inquire_remote_apic = default_inquire_remote_apic, + + .read = native_apic_mem_read, + .write = native_apic_mem_write, + .icr_read = native_apic_icr_read, + .icr_write = native_apic_icr_write, + .wait_icr_idle = native_apic_wait_icr_idle, + .safe_wait_icr_idle = native_safe_apic_wait_icr_idle, + + .x86_32_early_logical_apicid = default_x86_32_early_logical_apicid, +}; + +apic_driver(apic_default); + +struct apic *apic = &apic_default; +EXPORT_SYMBOL_GPL(apic); + +static int cmdline_apic __initdata; +static int __init parse_apic(char *arg) +{ + struct apic **drv; + + if (!arg) + return -EINVAL; + + for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) { + if (!strcmp((*drv)->name, arg)) { + apic = *drv; + cmdline_apic = 1; + return 0; + } + } + + /* Parsed again by __setup for debug/verbose */ + return 0; +} +early_param("apic", parse_apic); + +void __init default_setup_apic_routing(void) +{ + int version = apic_version[boot_cpu_physical_apicid]; + + if (num_possible_cpus() > 8) { + switch (boot_cpu_data.x86_vendor) { + case X86_VENDOR_INTEL: + if (!APIC_XAPIC(version)) { + def_to_bigsmp = 0; + break; + } + /* If P4 and above fall through */ + case X86_VENDOR_AMD: + def_to_bigsmp = 1; + } + } + +#ifdef CONFIG_X86_BIGSMP + /* + * This is used to switch to bigsmp mode when + * - There is no apic= option specified by the user + * - generic_apic_probe() has chosen apic_default as the sub_arch + * - we find more than 8 CPUs in acpi LAPIC listing with xAPIC support + */ + + if (!cmdline_apic && apic == &apic_default) + generic_bigsmp_probe(); +#endif + + if (apic->setup_apic_routing) + apic->setup_apic_routing(); +} + +void __init generic_apic_probe(void) +{ + if (!cmdline_apic) { + struct apic **drv; + + for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) { + if ((*drv)->probe()) { + apic = *drv; + break; + } + } + /* Not visible without early console */ + if (drv == __apicdrivers_end) + panic("Didn't find an APIC driver"); + } + printk(KERN_INFO "Using APIC driver %s\n", apic->name); +} + +/* These functions can switch the APIC even after the initial ->probe() */ + +int __init +generic_mps_oem_check(struct mpc_table *mpc, char *oem, char *productid) +{ + struct apic **drv; + + for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) { + if (!((*drv)->mps_oem_check)) + continue; + if (!(*drv)->mps_oem_check(mpc, oem, productid)) + continue; + + if (!cmdline_apic) { + apic = *drv; + printk(KERN_INFO "Switched to APIC driver `%s'.\n", + apic->name); + } + return 1; + } + return 0; +} + +int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id) +{ + struct apic **drv; + + for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) { + if (!(*drv)->acpi_madt_oem_check) + continue; + if (!(*drv)->acpi_madt_oem_check(oem_id, oem_table_id)) + continue; + + if (!cmdline_apic) { + apic = *drv; + printk(KERN_INFO "Switched to APIC driver `%s'.\n", + apic->name); + } + return 1; + } + return 0; +} |