patch-1.3.93 linux/include/asm-sparc/smp.h

• Lines: 196
• Date: Sun Apr 21 12:30:34 1996
• Orig file: v1.3.92/linux/include/asm-sparc/smp.h
• Orig date: Fri Apr 12 15:52:06 1996

diff -u --recursive --new-file v1.3.92/linux/include/asm-sparc/smp.h linux/include/asm-sparc/smp.h
@@ -6,73 +6,142 @@
 #ifndef _SPARC_SMP_H
 #define _SPARC_SMP_H
 
-#include <asm/bitops.h>
-#include <asm/ptrace.h>
+#ifdef __SMP__
 
-/* Per processor Sparc parameters. */
+#ifndef __ASSEMBLY__
+
+/* PROM provided per-processor information we need
+ * to start them all up.
+ */
+
+struct prom_cpuinfo {
+	int prom_node;
+	int mid;
+};
+
+extern struct prom_cpuinfo linux_cpus[NCPUS];
+
+/* Per processor Sparc parameters we need. */
 
 struct cpuinfo_sparc {
-	unsigned char impl;
-	unsigned char vers;
-	unsigned long udelay_val;
+	unsigned long udelay_val; /* thats it */
 };
 
 extern struct cpuinfo_sparc cpu_data[NR_CPUS];
 
-typedef klock_t volatile unsigned char;
-extern klock_t kernel_lock;
+typedef volatile unsigned char klock_t;
+extern klock_t kernel_flag;
 
 #define KLOCK_HELD       0xff
 #define KLOCK_CLEAR      0x00
 
-struct sparc_ipi_invalidate {
-	struct mm_struct *mm;
-	unsigned long addr;   /* page for inv_pg, start for inv_rnge */
-	unsigned long end;    /* Used for inv_rnge only. */
-};
-
-struct sparc_ipimsg {
-	union {
-		/* Add more here as we need them. */
-		struct sparc_ipi_invalidate invmsg;
-	};
-};
-
-extern void smp_scan_prom_for_cpus(unsigned long, unsigned long);
-extern unsigned long smp_alloc_memory(unsigned long mem_base);
-extern unsigned long *kernel_stacks[NR_CPUS];
+/*
+ *	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;
-extern unsigned long kernel_counter;
+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(int cpl, struct pt_regs *regs);
-extern void smp_reschedule_irq(int cpl, struct pt_regs *regs);
-extern void smp_invalidate_rcv(void);
-extern volatils unsigned long syscall_count;
-
-extern void (*smp_invalidate_all)(void);
-extern void (*smp_invalidate_mm)(struct mm_struct *);
-extern void (*smp_invalidate_range)(struct mm_struct *, unsigned long, unsigned long);
-extern void (*smp_invalidate_page)(struct vm_area_struct *, unsigned long);
+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 _inline_ int smp_processor_id(void)
+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, 24, %0\n\t"
+			     "srl %0, 12, %0\n\t"
 			     "and %0, 3, %0\n\t" :
-			     "=&r" (cpuid) :
-			     "0" (cpuid));
+			     "=&r" (cpuid));
 	return cpuid;
 }
 
-/* Empirical PROM processor mailbox constants.  If the per-cpu mailbox
+
+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 */
+
+/* Imperical 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
@@ -86,6 +155,11 @@
 
 #define NO_PROC_ID            0xFF
 
-#define PROC_CHANGE_PENALTY   0x23
+#define PROC_CHANGE_PENALTY     20
+
+#define SMP_FROM_INT		1
+#define SMP_FROM_SYSCALL	2
+
+#endif /* !(__SMP__) */
 
 #endif /* !(_SPARC_SMP_H) */