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Diffstat (limited to 'include/asm-x86_64/smp.h')
| -rw-r--r-- | include/asm-x86_64/smp.h | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/include/asm-x86_64/smp.h b/include/asm-x86_64/smp.h new file mode 100644 index 000000000000..fe523e3e2ff4 --- /dev/null +++ b/include/asm-x86_64/smp.h @@ -0,0 +1,149 @@ +#ifndef __ASM_SMP_H +#define __ASM_SMP_H + +/* + * We need the APIC definitions automatically as part of 'smp.h' + */ +#ifndef __ASSEMBLY__ +#include <linux/config.h> +#include <linux/threads.h> +#include <linux/cpumask.h> +#include <linux/bitops.h> +extern int disable_apic; +#endif + +#ifdef CONFIG_X86_LOCAL_APIC +#ifndef __ASSEMBLY__ +#include <asm/fixmap.h> +#include <asm/mpspec.h> +#ifdef CONFIG_X86_IO_APIC +#include <asm/io_apic.h> +#endif +#include <asm/apic.h> +#include <asm/thread_info.h> +#endif +#endif + +#ifdef CONFIG_SMP +#ifndef ASSEMBLY + +#include <asm/pda.h> + +struct pt_regs; + +/* + * Private routines/data + */ + +extern void smp_alloc_memory(void); +extern cpumask_t cpu_online_map; +extern volatile unsigned long smp_invalidate_needed; +extern int pic_mode; +extern int smp_num_siblings; +extern void smp_flush_tlb(void); +extern void smp_message_irq(int cpl, void *dev_id, struct pt_regs *regs); +extern void smp_send_reschedule(int cpu); +extern void smp_invalidate_rcv(void); /* Process an NMI */ +extern void (*mtrr_hook) (void); +extern void zap_low_mappings(void); +void smp_stop_cpu(void); +extern cpumask_t cpu_sibling_map[NR_CPUS]; +extern u8 phys_proc_id[NR_CPUS]; + +#define SMP_TRAMPOLINE_BASE 0x6000 + +/* + * On x86 all CPUs are mapped 1:1 to the APIC space. + * This simplifies scheduling and IPI sending and + * compresses data structures. + */ + +extern cpumask_t cpu_callout_map; +extern cpumask_t cpu_callin_map; +#define cpu_possible_map cpu_callout_map + +static inline int num_booting_cpus(void) +{ + return cpus_weight(cpu_callout_map); +} + +#define __smp_processor_id() read_pda(cpunumber) + +extern __inline int hard_smp_processor_id(void) +{ + /* we don't want to mark this access volatile - bad code generation */ + return GET_APIC_ID(*(unsigned int *)(APIC_BASE+APIC_ID)); +} + +#define safe_smp_processor_id() (disable_apic ? 0 : x86_apicid_to_cpu(hard_smp_processor_id())) + +#endif /* !ASSEMBLY */ + +#define NO_PROC_ID 0xFF /* No processor magic marker */ + +#endif + +#ifndef ASSEMBLY +/* + * Some lowlevel functions might want to know about + * the real APIC ID <-> CPU # mapping. + */ +extern u8 x86_cpu_to_apicid[NR_CPUS]; /* physical ID */ +extern u8 x86_cpu_to_log_apicid[NR_CPUS]; +extern u8 bios_cpu_apicid[]; + +static inline unsigned int cpu_mask_to_apicid(cpumask_t cpumask) +{ + return cpus_addr(cpumask)[0]; +} + +static inline int x86_apicid_to_cpu(u8 apicid) +{ + int i; + + for (i = 0; i < NR_CPUS; ++i) + if (x86_cpu_to_apicid[i] == apicid) + return i; + + /* No entries in x86_cpu_to_apicid? Either no MPS|ACPI, + * or called too early. Either way, we must be CPU 0. */ + if (x86_cpu_to_apicid[0] == BAD_APICID) + return 0; + + return -1; +} + +static inline int cpu_present_to_apicid(int mps_cpu) +{ + if (mps_cpu < NR_CPUS) + return (int)bios_cpu_apicid[mps_cpu]; + else + return BAD_APICID; +} + +#endif /* !ASSEMBLY */ + +#ifndef CONFIG_SMP +#define stack_smp_processor_id() 0 +#define safe_smp_processor_id() 0 +#define cpu_logical_map(x) (x) +#else +#include <asm/thread_info.h> +#define stack_smp_processor_id() \ +({ \ + struct thread_info *ti; \ + __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \ + ti->cpu; \ +}) +#endif + +#ifndef __ASSEMBLY__ +static __inline int logical_smp_processor_id(void) +{ + /* we don't want to mark this access volatile - bad code generation */ + return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR)); +} +#endif + +#endif + |