patch-2.4.2 linux/include/asm-s390x/smp.h
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- Lines: 79
- Date:
Tue Feb 13 14:13:44 2001
- Orig file:
v2.4.1/linux/include/asm-s390x/smp.h
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.4.1/linux/include/asm-s390x/smp.h linux/include/asm-s390x/smp.h
@@ -0,0 +1,78 @@
+/*
+ * include/asm-s390/smp.h
+ *
+ * S390 version
+ * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ * Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com),
+ * Martin Schwidefsky (schwidefsky@de.ibm.com)
+ */
+#ifndef __ASM_SMP_H
+#define __ASM_SMP_H
+#include <linux/config.h>
+#ifdef CONFIG_SMP
+#ifndef __ASSEMBLY__
+
+#include <asm/lowcore.h>
+#include <linux/kernel.h> // FOR FASTCALL definition
+
+#define smp_processor_id() (current->processor)
+#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 */
+
+extern void count_cpus(void);
+
+extern __inline__ int cpu_logical_map(int cpu)
+{
+ return cpu;
+}
+
+extern __inline__ int cpu_number_map(int cpu)
+{
+ return cpu;
+}
+
+extern __inline__ __u16 hard_smp_processor_id(void)
+{
+ __u16 cpu_address;
+
+ __asm__ ("stap %0\n" : "=m" (cpu_address));
+ return cpu_address;
+}
+
+#define cpu_logical_map(cpu) (cpu)
+
+void smp_local_timer_interrupt(struct pt_regs * regs);
+
+/*
+ s390 specific smp.c headers
+ */
+typedef struct
+{
+ int intresting;
+ sigp_ccode ccode;
+ __u32 status;
+ __u16 cpu;
+} sigp_info;
+
+sigp_ccode
+smp_ext_call(int cpu, void (*callback)(void *info), void *info, int wait);
+void smp_ext_call_others(void (*callback)(void *info), void *info, int wait);
+sigp_ccode smp_ext_bitcall(int cpu, ec_bit_sig sig);
+void smp_ext_bitcall_others(ec_bit_sig sig);
+
+int smp_signal_others(sigp_order_code order_code,__u32 parameter,
+ int spin,sigp_info *info);
+#endif
+#endif
+#endif
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