From 871480933a1c28f8a9fed4c4d34d06c439a7a422 Mon Sep 17 00:00:00 2001 From: Srikant Patnaik Date: Sun, 11 Jan 2015 12:28:04 +0530 Subject: Moved, renamed, and deleted files The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure. --- arch/x86/kernel/apic/bigsmp_32.c | 279 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 279 insertions(+) create mode 100644 arch/x86/kernel/apic/bigsmp_32.c (limited to 'arch/x86/kernel/apic/bigsmp_32.c') diff --git a/arch/x86/kernel/apic/bigsmp_32.c b/arch/x86/kernel/apic/bigsmp_32.c new file mode 100644 index 00000000..0cdec706 --- /dev/null +++ b/arch/x86/kernel/apic/bigsmp_32.c @@ -0,0 +1,279 @@ +/* + * APIC driver for "bigsmp" xAPIC machines with more than 8 virtual CPUs. + * + * Drives the local APIC in "clustered mode". + */ +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +static unsigned bigsmp_get_apic_id(unsigned long x) +{ + return (x >> 24) & 0xFF; +} + +static int bigsmp_apic_id_registered(void) +{ + return 1; +} + +static const struct cpumask *bigsmp_target_cpus(void) +{ +#ifdef CONFIG_SMP + return cpu_online_mask; +#else + return cpumask_of(0); +#endif +} + +static unsigned long bigsmp_check_apicid_used(physid_mask_t *map, int apicid) +{ + return 0; +} + +static unsigned long bigsmp_check_apicid_present(int bit) +{ + return 1; +} + +static int bigsmp_early_logical_apicid(int cpu) +{ + /* on bigsmp, logical apicid is the same as physical */ + return early_per_cpu(x86_cpu_to_apicid, cpu); +} + +static inline unsigned long calculate_ldr(int cpu) +{ + unsigned long val, id; + + val = apic_read(APIC_LDR) & ~APIC_LDR_MASK; + id = per_cpu(x86_bios_cpu_apicid, cpu); + val |= SET_APIC_LOGICAL_ID(id); + + return val; +} + +/* + * Set up the logical destination ID. + * + * Intel recommends to set DFR, LDR and TPR before enabling + * an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel + * document number 292116). So here it goes... + */ +static void bigsmp_init_apic_ldr(void) +{ + unsigned long val; + int cpu = smp_processor_id(); + + apic_write(APIC_DFR, APIC_DFR_FLAT); + val = calculate_ldr(cpu); + apic_write(APIC_LDR, val); +} + +static void bigsmp_setup_apic_routing(void) +{ + printk(KERN_INFO + "Enabling APIC mode: Physflat. Using %d I/O APICs\n", + nr_ioapics); +} + +static int bigsmp_cpu_present_to_apicid(int mps_cpu) +{ + if (mps_cpu < nr_cpu_ids) + return (int) per_cpu(x86_bios_cpu_apicid, mps_cpu); + + return BAD_APICID; +} + +static void bigsmp_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap) +{ + /* For clustered we don't have a good way to do this yet - hack */ + physids_promote(0xFFL, retmap); +} + +static int bigsmp_check_phys_apicid_present(int phys_apicid) +{ + return 1; +} + +/* As we are using single CPU as destination, pick only one CPU here */ +static unsigned int bigsmp_cpu_mask_to_apicid(const struct cpumask *cpumask) +{ + int cpu = cpumask_first(cpumask); + + if (cpu < nr_cpu_ids) + return cpu_physical_id(cpu); + return BAD_APICID; +} + +static unsigned int bigsmp_cpu_mask_to_apicid_and(const struct cpumask *cpumask, + const struct cpumask *andmask) +{ + int cpu; + + /* + * We're using fixed IRQ delivery, can only return one phys APIC ID. + * May as well be the first. + */ + for_each_cpu_and(cpu, cpumask, andmask) { + if (cpumask_test_cpu(cpu, cpu_online_mask)) + return cpu_physical_id(cpu); + } + return BAD_APICID; +} + +static int bigsmp_phys_pkg_id(int cpuid_apic, int index_msb) +{ + return cpuid_apic >> index_msb; +} + +static inline void bigsmp_send_IPI_mask(const struct cpumask *mask, int vector) +{ + default_send_IPI_mask_sequence_phys(mask, vector); +} + +static void bigsmp_send_IPI_allbutself(int vector) +{ + default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector); +} + +static void bigsmp_send_IPI_all(int vector) +{ + bigsmp_send_IPI_mask(cpu_online_mask, vector); +} + +static int dmi_bigsmp; /* can be set by dmi scanners */ + +static int hp_ht_bigsmp(const struct dmi_system_id *d) +{ + printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident); + dmi_bigsmp = 1; + + return 0; +} + + +static const struct dmi_system_id bigsmp_dmi_table[] = { + { hp_ht_bigsmp, "HP ProLiant DL760 G2", + { DMI_MATCH(DMI_BIOS_VENDOR, "HP"), + DMI_MATCH(DMI_BIOS_VERSION, "P44-"), + } + }, + + { hp_ht_bigsmp, "HP ProLiant DL740", + { DMI_MATCH(DMI_BIOS_VENDOR, "HP"), + DMI_MATCH(DMI_BIOS_VERSION, "P47-"), + } + }, + { } /* NULL entry stops DMI scanning */ +}; + +static void bigsmp_vector_allocation_domain(int cpu, struct cpumask *retmask) +{ + cpumask_clear(retmask); + cpumask_set_cpu(cpu, retmask); +} + +static int probe_bigsmp(void) +{ + if (def_to_bigsmp) + dmi_bigsmp = 1; + else + dmi_check_system(bigsmp_dmi_table); + + return dmi_bigsmp; +} + +static struct apic apic_bigsmp = { + + .name = "bigsmp", + .probe = probe_bigsmp, + .acpi_madt_oem_check = NULL, + .apic_id_valid = default_apic_id_valid, + .apic_id_registered = bigsmp_apic_id_registered, + + .irq_delivery_mode = dest_Fixed, + /* phys delivery to target CPU: */ + .irq_dest_mode = 0, + + .target_cpus = bigsmp_target_cpus, + .disable_esr = 1, + .dest_logical = 0, + .check_apicid_used = bigsmp_check_apicid_used, + .check_apicid_present = bigsmp_check_apicid_present, + + .vector_allocation_domain = bigsmp_vector_allocation_domain, + .init_apic_ldr = bigsmp_init_apic_ldr, + + .ioapic_phys_id_map = bigsmp_ioapic_phys_id_map, + .setup_apic_routing = bigsmp_setup_apic_routing, + .multi_timer_check = NULL, + .cpu_present_to_apicid = bigsmp_cpu_present_to_apicid, + .apicid_to_cpu_present = physid_set_mask_of_physid, + .setup_portio_remap = NULL, + .check_phys_apicid_present = bigsmp_check_phys_apicid_present, + .enable_apic_mode = NULL, + .phys_pkg_id = bigsmp_phys_pkg_id, + .mps_oem_check = NULL, + + .get_apic_id = bigsmp_get_apic_id, + .set_apic_id = NULL, + .apic_id_mask = 0xFF << 24, + + .cpu_mask_to_apicid = bigsmp_cpu_mask_to_apicid, + .cpu_mask_to_apicid_and = bigsmp_cpu_mask_to_apicid_and, + + .send_IPI_mask = bigsmp_send_IPI_mask, + .send_IPI_mask_allbutself = NULL, + .send_IPI_allbutself = bigsmp_send_IPI_allbutself, + .send_IPI_all = bigsmp_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 = bigsmp_early_logical_apicid, +}; + +void __init generic_bigsmp_probe(void) +{ + unsigned int cpu; + + if (!probe_bigsmp()) + return; + + apic = &apic_bigsmp; + + for_each_possible_cpu(cpu) { + if (early_per_cpu(x86_cpu_to_logical_apicid, + cpu) == BAD_APICID) + continue; + early_per_cpu(x86_cpu_to_logical_apicid, cpu) = + bigsmp_early_logical_apicid(cpu); + } + + pr_info("Overriding APIC driver with %s\n", apic_bigsmp.name); +} + +apic_driver(apic_bigsmp); -- cgit