smp.h
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上传日期:2013-04-10
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- /* smp.h: Sparc specific SMP stuff.
- *
- * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
- */
- #ifndef _SPARC_SMP_H
- #define _SPARC_SMP_H
- #include <linux/config.h>
- #include <linux/threads.h>
- #include <asm/head.h>
- #include <asm/btfixup.h>
- #ifndef __ASSEMBLY__
- /* PROM provided per-processor information we need
- * to start them all up.
- */
- struct prom_cpuinfo {
- int prom_node;
- int mid;
- };
- extern int linux_num_cpus; /* number of CPUs probed */
- #endif /* !(__ASSEMBLY__) */
- #ifdef CONFIG_SMP
- #ifndef __ASSEMBLY__
- #include <asm/ptrace.h>
- #include <asm/asi.h>
- extern struct prom_cpuinfo linux_cpus[NR_CPUS];
- /* Per processor Sparc parameters we need. */
- struct cpuinfo_sparc {
- unsigned long udelay_val; /* that's it */
- unsigned short next;
- unsigned short mid;
- };
- extern struct cpuinfo_sparc cpu_data[NR_CPUS];
- extern unsigned long cpu_offset[NR_CPUS];
- /*
- * Private routines/data
- */
-
- extern int smp_found_cpus;
- extern unsigned char boot_cpu_id;
- extern unsigned long cpu_present_map;
- #define cpu_online_map cpu_present_map
- typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long,
- unsigned long, unsigned long);
- /*
- * General functions that each host system must provide.
- */
-
- void sun4m_init_smp(void);
- void sun4d_init_smp(void);
- void smp_callin(void);
- void smp_boot_cpus(void);
- void smp_store_cpu_info(int);
- struct seq_file;
- void smp_bogo_info(struct seq_file *);
- void smp_info(struct seq_file *);
- BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long)
- BTFIXUPDEF_CALL(void, smp_message_pass, int, int, unsigned long, int)
- BTFIXUPDEF_CALL(int, __smp_processor_id, void)
- BTFIXUPDEF_BLACKBOX(smp_processor_id)
- BTFIXUPDEF_BLACKBOX(load_current)
- #define smp_cross_call(func,arg1,arg2,arg3,arg4,arg5) BTFIXUP_CALL(smp_cross_call)(func,arg1,arg2,arg3,arg4,arg5)
- #define smp_message_pass(target,msg,data,wait) BTFIXUP_CALL(smp_message_pass)(target,msg,data,wait)
- extern __inline__ void xc0(smpfunc_t func) { smp_cross_call(func, 0, 0, 0, 0, 0); }
- extern __inline__ void xc1(smpfunc_t func, unsigned long arg1)
- { smp_cross_call(func, arg1, 0, 0, 0, 0); }
- extern __inline__ void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2)
- { smp_cross_call(func, arg1, arg2, 0, 0, 0); }
- extern __inline__ void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2,
- unsigned long arg3)
- { smp_cross_call(func, arg1, arg2, arg3, 0, 0); }
- extern __inline__ void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2,
- unsigned long arg3, unsigned long arg4)
- { smp_cross_call(func, arg1, arg2, arg3, arg4, 0); }
- extern __inline__ void xc5(smpfunc_t func, unsigned long arg1, unsigned long arg2,
- unsigned long arg3, unsigned long arg4, unsigned long arg5)
- { smp_cross_call(func, arg1, arg2, arg3, arg4, arg5); }
- extern __inline__ int smp_call_function(void (*func)(void *info), void *info, int nonatomic, int wait)
- {
- xc1((smpfunc_t)func, (unsigned long)info);
- return 0;
- }
- extern __volatile__ int __cpu_number_map[NR_CPUS];
- extern __volatile__ int __cpu_logical_map[NR_CPUS];
- extern unsigned long smp_proc_in_lock[NR_CPUS];
- extern __inline__ int cpu_logical_map(int cpu)
- {
- return __cpu_logical_map[cpu];
- }
- extern __inline__ int cpu_number_map(int cpu)
- {
- return __cpu_number_map[cpu];
- }
- extern __inline__ int hard_smp4m_processor_id(void)
- {
- int cpuid;
- __asm__ __volatile__("rd %%tbr, %0nt"
- "srl %0, 12, %0nt"
- "and %0, 3, %0nt" :
- "=&r" (cpuid));
- return cpuid;
- }
- extern __inline__ int hard_smp4d_processor_id(void)
- {
- int cpuid;
- __asm__ __volatile__("lda [%%g0] %1, %0nt" :
- "=&r" (cpuid) : "i" (ASI_M_VIKING_TMP1));
- return cpuid;
- }
- #ifndef MODULE
- extern __inline__ int hard_smp_processor_id(void)
- {
- int cpuid;
- /* Black box - sun4m
- __asm__ __volatile__("rd %%tbr, %0nt"
- "srl %0, 12, %0nt"
- "and %0, 3, %0nt" :
- "=&r" (cpuid));
- - sun4d
- __asm__ __volatile__("lda [%g0] ASI_M_VIKING_TMP1, %0nt"
- "nop; nop" :
- "=&r" (cpuid));
- See btfixup.h and btfixupprep.c to understand how a blackbox works.
- */
- __asm__ __volatile__("sethi %%hi(___b_smp_processor_id), %0nt"
- "sethi %%hi(boot_cpu_id), %0nt"
- "ldub [%0 + %%lo(boot_cpu_id)], %0nt" :
- "=&r" (cpuid));
- return cpuid;
- }
- #else
- extern __inline__ int hard_smp_processor_id(void)
- {
- int cpuid;
-
- __asm__ __volatile__("mov %%o7, %%g1nt"
- "call ___f___smp_processor_idnt"
- " nopnt"
- "mov %%g2, %0nt" : "=r"(cpuid) : : "g1", "g2");
- return cpuid;
- }
- #endif
- #define smp_processor_id() hard_smp_processor_id()
- /* XXX We really need to implement this now. -DaveM */
- extern __inline__ void smp_send_reschedule(int cpu) { }
- extern __inline__ void smp_send_stop(void) { }
- #endif /* !(__ASSEMBLY__) */
- /* Sparc specific messages. */
- #define MSG_CROSS_CALL 0x0005 /* run func on cpus */
- /* Empirical PROM processor mailbox constants. If the per-cpu mailbox
- * contains something other than one of these then the ipi is from
- * Linux's active_kernel_processor. This facility exists so that
- * the boot monitor can capture all the other cpus when one catches
- * a watchdog reset or the user enters the monitor using L1-A keys.
- */
- #define MBOX_STOPCPU 0xFB
- #define MBOX_IDLECPU 0xFC
- #define MBOX_IDLECPU2 0xFD
- #define MBOX_STOPCPU2 0xFE
- #define PROC_CHANGE_PENALTY 15
- #endif /* !(CONFIG_SMP) */
- #define NO_PROC_ID 0xFF
- #endif /* !(_SPARC_SMP_H) */