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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
#ifndef __ASSEMBLY__
/* PROM provided per-processor information we need
* to start them all up.
*/
struct prom_cpuinfo {
int prom_node;
int mid;
};
#endif /* !(__ASSEMBLY__) */
#ifdef __SMP__
#ifndef __ASSEMBLY__
extern struct prom_cpuinfo linux_cpus[NCPUS];
/* Per processor Sparc parameters we need. */
struct cpuinfo_sparc {
unsigned long udelay_val; /* that's it */
};
extern struct cpuinfo_sparc cpu_data[NR_CPUS];
typedef volatile unsigned char klock_t;
extern klock_t kernel_flag;
#define KLOCK_HELD 0xff
#define KLOCK_CLEAR 0x00
/*
* Private routines/data
*/
extern int smp_found_cpus;
extern unsigned char boot_cpu_id;
extern unsigned long cpu_present_map;
extern volatile unsigned long smp_invalidate_needed[NR_CPUS];
extern volatile unsigned long kernel_counter;
extern volatile unsigned char active_kernel_processor;
extern void smp_message_irq(void);
extern unsigned long ipi_count;
extern volatile unsigned long kernel_counter;
extern volatile unsigned long syscall_count;
extern void print_lock_state(void);
typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long,
unsigned long, unsigned long);
/*
* 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);
extern void smp_cross_call(smpfunc_t func, unsigned long arg1, unsigned long arg2,
unsigned long arg3, unsigned long arg4, unsigned long arg5);
extern void smp_capture(void);
extern void smp_release(void);
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 volatile int cpu_number_map[NR_CPUS];
extern volatile int cpu_logical_map[NR_CPUS];
extern __inline int smp_processor_id(void)
{
int cpuid;
__asm__ __volatile__("rd %%tbr, %0\n\t"
"srl %0, 12, %0\n\t"
"and %0, 3, %0\n\t" :
"=&r" (cpuid));
return cpuid;
}
extern volatile unsigned long smp_proc_in_lock[NR_CPUS]; /* for computing process time */
extern volatile int smp_process_available;
extern inline int smp_swap(volatile int *addr, int value)
{
__asm__ __volatile__("swap [%2], %0\n\t" :
"=&r" (value) :
"0" (value), "r" (addr));
return value;
}
extern inline volatile void inc_smp_counter(volatile int *ctr)
{
int tmp;
while((tmp = smp_swap(ctr, -1)) == -1)
;
smp_swap(ctr, (tmp + 1));
}
extern inline volatile void dec_smp_counter(volatile int *ctr)
{
int tmp;
while((tmp = smp_swap(ctr, -1)) == -1)
;
smp_swap(ctr, (tmp - 1));
}
extern inline volatile int read_smp_counter(volatile int *ctr)
{
int value;
while((value = *ctr) == -1)
;
return value;
}
#endif /* !(__ASSEMBLY__) */
/* Sparc specific messages. */
#define MSG_CAPTURE 0x0004 /* Park a processor. */
#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 NO_PROC_ID 0xFF
#define PROC_CHANGE_PENALTY 20
#define SMP_FROM_INT 1
#define SMP_FROM_SYSCALL 2
#endif /* !(__SMP__) */
#endif /* !(_SPARC_SMP_H) */
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