1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
150 lines
3.3 KiB
C
150 lines
3.3 KiB
C
#ifndef __ASM_SMP_H
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#define __ASM_SMP_H
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/*
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* We need the APIC definitions automatically as part of 'smp.h'
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*/
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#ifndef __ASSEMBLY__
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#include <linux/config.h>
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#include <linux/threads.h>
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#include <linux/cpumask.h>
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#include <linux/bitops.h>
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extern int disable_apic;
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#endif
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#ifdef CONFIG_X86_LOCAL_APIC
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#ifndef __ASSEMBLY__
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#include <asm/fixmap.h>
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#include <asm/mpspec.h>
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#ifdef CONFIG_X86_IO_APIC
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#include <asm/io_apic.h>
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#endif
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#include <asm/apic.h>
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#include <asm/thread_info.h>
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#endif
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#endif
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#ifdef CONFIG_SMP
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#ifndef ASSEMBLY
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#include <asm/pda.h>
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struct pt_regs;
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/*
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* Private routines/data
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*/
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extern void smp_alloc_memory(void);
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extern cpumask_t cpu_online_map;
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extern volatile unsigned long smp_invalidate_needed;
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extern int pic_mode;
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extern int smp_num_siblings;
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extern void smp_flush_tlb(void);
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extern void smp_message_irq(int cpl, void *dev_id, struct pt_regs *regs);
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extern void smp_send_reschedule(int cpu);
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extern void smp_invalidate_rcv(void); /* Process an NMI */
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extern void (*mtrr_hook) (void);
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extern void zap_low_mappings(void);
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void smp_stop_cpu(void);
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extern cpumask_t cpu_sibling_map[NR_CPUS];
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extern u8 phys_proc_id[NR_CPUS];
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#define SMP_TRAMPOLINE_BASE 0x6000
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/*
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* On x86 all CPUs are mapped 1:1 to the APIC space.
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* This simplifies scheduling and IPI sending and
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* compresses data structures.
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*/
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extern cpumask_t cpu_callout_map;
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extern cpumask_t cpu_callin_map;
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#define cpu_possible_map cpu_callout_map
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static inline int num_booting_cpus(void)
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{
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return cpus_weight(cpu_callout_map);
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}
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#define __smp_processor_id() read_pda(cpunumber)
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extern __inline int hard_smp_processor_id(void)
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{
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/* we don't want to mark this access volatile - bad code generation */
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return GET_APIC_ID(*(unsigned int *)(APIC_BASE+APIC_ID));
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}
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#define safe_smp_processor_id() (disable_apic ? 0 : x86_apicid_to_cpu(hard_smp_processor_id()))
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#endif /* !ASSEMBLY */
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#define NO_PROC_ID 0xFF /* No processor magic marker */
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#endif
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#ifndef ASSEMBLY
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/*
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* Some lowlevel functions might want to know about
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* the real APIC ID <-> CPU # mapping.
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*/
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extern u8 x86_cpu_to_apicid[NR_CPUS]; /* physical ID */
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extern u8 x86_cpu_to_log_apicid[NR_CPUS];
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extern u8 bios_cpu_apicid[];
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static inline unsigned int cpu_mask_to_apicid(cpumask_t cpumask)
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{
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return cpus_addr(cpumask)[0];
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}
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static inline int x86_apicid_to_cpu(u8 apicid)
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{
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int i;
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for (i = 0; i < NR_CPUS; ++i)
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if (x86_cpu_to_apicid[i] == apicid)
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return i;
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/* No entries in x86_cpu_to_apicid? Either no MPS|ACPI,
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* or called too early. Either way, we must be CPU 0. */
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if (x86_cpu_to_apicid[0] == BAD_APICID)
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return 0;
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return -1;
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}
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static inline int cpu_present_to_apicid(int mps_cpu)
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{
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if (mps_cpu < NR_CPUS)
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return (int)bios_cpu_apicid[mps_cpu];
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else
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return BAD_APICID;
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}
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#endif /* !ASSEMBLY */
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#ifndef CONFIG_SMP
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#define stack_smp_processor_id() 0
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#define safe_smp_processor_id() 0
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#define cpu_logical_map(x) (x)
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#else
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#include <asm/thread_info.h>
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#define stack_smp_processor_id() \
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({ \
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struct thread_info *ti; \
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__asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
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ti->cpu; \
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})
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#endif
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#ifndef __ASSEMBLY__
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static __inline int logical_smp_processor_id(void)
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{
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/* we don't want to mark this access volatile - bad code generation */
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return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
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}
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#endif
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#endif
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