diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/bigsmp_32.c | 43 |
1 files changed, 24 insertions, 19 deletions
diff --git a/arch/x86/kernel/bigsmp_32.c b/arch/x86/kernel/bigsmp_32.c index f49af36351fa..41732abd7004 100644 --- a/arch/x86/kernel/bigsmp_32.c +++ b/arch/x86/kernel/bigsmp_32.c @@ -1,27 +1,26 @@ /* - * APIC driver for "bigsmp" XAPIC machines with more than 8 virtual CPUs. + * APIC driver for "bigsmp" xAPIC machines with more than 8 virtual CPUs. + * * Drives the local APIC in "clustered mode". */ #include <linux/threads.h> #include <linux/cpumask.h> -#include <asm/mpspec.h> -#include <asm/apic.h> -#include <asm/fixmap.h> -#include <asm/apicdef.h> -#include <asm/ipi.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/dmi.h> #include <linux/smp.h> +#include <asm/apicdef.h> +#include <asm/fixmap.h> +#include <asm/mpspec.h> +#include <asm/apic.h> +#include <asm/ipi.h> static inline unsigned bigsmp_get_apic_id(unsigned long x) { return (x >> 24) & 0xFF; } -#define xapic_phys_to_log_apicid(cpu) (per_cpu(x86_bios_cpu_apicid, cpu)) - static inline int bigsmp_apic_id_registered(void) { return 1; @@ -36,8 +35,6 @@ static inline const cpumask_t *bigsmp_target_cpus(void) #endif } -#define APIC_DFR_VALUE (APIC_DFR_FLAT) - static inline unsigned long bigsmp_check_apicid_used(physid_mask_t bitmap, int apicid) { @@ -52,9 +49,11 @@ static inline unsigned long bigsmp_check_apicid_present(int bit) static inline unsigned long calculate_ldr(int cpu) { unsigned long val, id; + val = apic_read(APIC_LDR) & ~APIC_LDR_MASK; - id = xapic_phys_to_log_apicid(cpu); + id = per_cpu(x86_bios_cpu_apicid, cpu); val |= SET_APIC_LOGICAL_ID(id); + return val; } @@ -70,15 +69,16 @@ static inline void bigsmp_init_apic_ldr(void) unsigned long val; int cpu = smp_processor_id(); - apic_write(APIC_DFR, APIC_DFR_VALUE); + apic_write(APIC_DFR, APIC_DFR_FLAT); val = calculate_ldr(cpu); apic_write(APIC_LDR, val); } static inline void bigsmp_setup_apic_routing(void) { - printk("Enabling APIC mode: %s. Using %d I/O APICs\n", - "Physflat", nr_ioapics); + printk(KERN_INFO + "Enabling APIC mode: Physflat. Using %d I/O APICs\n", + nr_ioapics); } static inline int bigsmp_apicid_to_node(int logical_apicid) @@ -100,6 +100,7 @@ static inline physid_mask_t bigsmp_apicid_to_cpu_present(int phys_apicid) } extern u8 cpu_2_logical_apicid[]; + /* Mapping from cpu number to logical apicid */ static inline int bigsmp_cpu_to_logical_apicid(int cpu) { @@ -175,21 +176,24 @@ 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-"),} + { 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-"),} + { 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, cpumask_t *retmask) @@ -204,6 +208,7 @@ static int probe_bigsmp(void) dmi_bigsmp = 1; else dmi_check_system(bigsmp_dmi_table); + return dmi_bigsmp; } |