#ifndef __ASM_SMP_H #define __ASM_SMP_H #ifdef __SMP__ #ifndef ASSEMBLY #include #include #include #include #include /* * Support definitions for SMP machines following the intel multiprocessing * specification */ /* * This tag identifies where the SMP configuration * information is. */ #define SMP_MAGIC_IDENT (('_'<<24)|('P'<<16)|('M'<<8)|'_') struct intel_mp_floating { char mpf_signature[4]; /* "_MP_" */ unsigned long mpf_physptr; /* Configuration table address */ unsigned char mpf_length; /* Our length (paragraphs) */ unsigned char mpf_specification;/* Specification version */ unsigned char mpf_checksum; /* Checksum (makes sum 0) */ unsigned char mpf_feature1; /* Standard or configuration ? */ unsigned char mpf_feature2; /* Bit7 set for IMCR|PIC */ unsigned char mpf_feature3; /* Unused (0) */ unsigned char mpf_feature4; /* Unused (0) */ unsigned char mpf_feature5; /* Unused (0) */ }; struct mp_config_table { char mpc_signature[4]; #define MPC_SIGNATURE "PCMP" unsigned short mpc_length; /* Size of table */ char mpc_spec; /* 0x01 */ char mpc_checksum; char mpc_oem[8]; char mpc_productid[12]; unsigned long mpc_oemptr; /* 0 if not present */ unsigned short mpc_oemsize; /* 0 if not present */ unsigned short mpc_oemcount; unsigned long mpc_lapic; /* APIC address */ unsigned long reserved; }; /* Followed by entries */ #define MP_PROCESSOR 0 #define MP_BUS 1 #define MP_IOAPIC 2 #define MP_INTSRC 3 #define MP_LINTSRC 4 struct mpc_config_processor { unsigned char mpc_type; unsigned char mpc_apicid; /* Local APIC number */ unsigned char mpc_apicver; /* Its versions */ unsigned char mpc_cpuflag; #define CPU_ENABLED 1 /* Processor is available */ #define CPU_BOOTPROCESSOR 2 /* Processor is the BP */ unsigned long mpc_cpufeature; #define CPU_STEPPING_MASK 0x0F #define CPU_MODEL_MASK 0xF0 #define CPU_FAMILY_MASK 0xF00 unsigned long mpc_featureflag; /* CPUID feature value */ unsigned long mpc_reserved[2]; }; struct mpc_config_bus { unsigned char mpc_type; unsigned char mpc_busid; unsigned char mpc_bustype[6] __attribute((packed)); }; #define BUSTYPE_EISA "EISA" #define BUSTYPE_ISA "ISA" #define BUSTYPE_INTERN "INTERN" /* Internal BUS */ #define BUSTYPE_MCA "MCA" #define BUSTYPE_VL "VL" /* Local bus */ #define BUSTYPE_PCI "PCI" #define BUSTYPE_PCMCIA "PCMCIA" /* We don't understand the others */ struct mpc_config_ioapic { unsigned char mpc_type; unsigned char mpc_apicid; unsigned char mpc_apicver; unsigned char mpc_flags; #define MPC_APIC_USABLE 0x01 unsigned long mpc_apicaddr; }; struct mpc_config_intsrc { unsigned char mpc_type; unsigned char mpc_irqtype; unsigned short mpc_irqflag; unsigned char mpc_srcbus; unsigned char mpc_srcbusirq; unsigned char mpc_dstapic; unsigned char mpc_dstirq; }; #define MP_INT_VECTORED 0 #define MP_INT_NMI 1 #define MP_INT_SMI 2 #define MP_INT_EXTINT 3 #define MP_IRQDIR_DEFAULT 0 #define MP_IRQDIR_HIGH 1 #define MP_IRQDIR_LOW 3 struct mpc_config_intlocal { unsigned char mpc_type; unsigned char mpc_irqtype; unsigned short mpc_irqflag; unsigned char mpc_srcbusid; unsigned char mpc_srcbusirq; unsigned char mpc_destapic; #define MP_APIC_ALL 0xFF unsigned char mpc_destapiclint; }; /* * Default configurations * * 1 2 CPU ISA 82489DX * 2 2 CPU EISA 82489DX no IRQ 8 or timer chaining * 3 2 CPU EISA 82489DX * 4 2 CPU MCA 82489DX * 5 2 CPU ISA+PCI * 6 2 CPU EISA+PCI * 7 2 CPU MCA+PCI */ /* * Private routines/data */ extern int smp_found_config; extern int smp_scan_config(unsigned long, unsigned long); extern unsigned long smp_alloc_memory(unsigned long mem_base); extern unsigned char boot_cpu_id; extern unsigned long cpu_present_map; extern volatile int cpu_number_map[NR_CPUS]; extern volatile unsigned long smp_invalidate_needed; extern void smp_flush_tlb(void); extern volatile unsigned long cpu_callin_map[NR_CPUS]; extern void smp_message_irq(int cpl, void *dev_id, struct pt_regs *regs); extern void smp_send_reschedule(int cpu); extern unsigned long ipi_count; extern void smp_invalidate_rcv(void); /* Process an NMI */ extern void smp_local_timer_interrupt(struct pt_regs * regs); extern void (*mtrr_hook) (void); extern void setup_APIC_clock (void); extern volatile int __cpu_logical_map[NR_CPUS]; extern inline int cpu_logical_map(int cpu) { return __cpu_logical_map[cpu]; } /* * General functions that each host system must provide. */ extern void smp_callin(void); extern void smp_boot_cpus(void); extern void smp_store_cpu_info(int id); /* Store per CPU info (like the initial udelay numbers */ extern void smp_message_pass(int target, int msg, unsigned long data, int wait); extern volatile unsigned long smp_proc_in_lock[NR_CPUS]; /* for computing process time */ extern volatile int smp_process_available; /* * APIC handlers: Note according to the Intel specification update * you should put reads between APIC writes. * Intel Pentium processor specification update [11AP, pg 64] * "Back to Back Assertions of HOLD May Cause Lost APIC Write Cycle" */ #define APIC_BASE (fix_to_virt(FIX_APIC_BASE)) extern __inline void apic_write(unsigned long reg, unsigned long v) { *((volatile unsigned long *)(APIC_BASE+reg))=v; } extern __inline unsigned long apic_read(unsigned long reg) { return *((volatile unsigned long *)(APIC_BASE+reg)); } /* * This function is needed by all SMP systems. It must _always_ be valid * from the initial startup. We map APIC_BASE very early in page_setup(), * so this is correct in the x86 case. */ #define smp_processor_id() (current->processor) 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 long *)(APIC_BASE+APIC_ID)); } #endif /* !ASSEMBLY */ #define NO_PROC_ID 0xFF /* No processor magic marker */ /* * This magic constant controls our willingness to transfer * a process across CPUs. Such a transfer incurs misses on the L1 * cache, and on a P6 or P5 with multiple L2 caches L2 hits. My * gut feeling is this will vary by board in value. For a board * with separate L2 cache it probably depends also on the RSS, and * for a board with shared L2 cache it ought to decay fast as other * processes are run. */ #define PROC_CHANGE_PENALTY 20 /* Schedule penalty */ #define SMP_FROM_INT 1 #define SMP_FROM_SYSCALL 2 #endif #endif