patch-2.3.43 linux/include/asm-ia64/smp.h

• Lines: 101
• Date: Tue Feb 8 12:01:59 2000
• Orig file: v2.3.42/linux/include/asm-ia64/smp.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.42/linux/include/asm-ia64/smp.h linux/include/asm-ia64/smp.h
@@ -0,0 +1,100 @@
+/*
+ * SMP Support
+ *
+ * Copyright (C) 1999 VA Linux Systems 
+ * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
+ */
+#ifndef _ASM_IA64_SMP_H
+#define _ASM_IA64_SMP_H
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/threads.h>
+#include <linux/kernel.h>
+
+#include <asm/ptrace.h>
+#include <asm/spinlock.h>
+#include <asm/io.h>
+
+#define IPI_DEFAULT_BASE_ADDR	0xfee00000
+#define XTP_OFFSET		0x1e0008
+
+#define smp_processor_id() (current->processor)
+
+extern unsigned long cpu_present_map;
+extern unsigned long cpu_online_map;
+extern unsigned long ipi_base_addr;
+extern int bootstrap_processor;
+extern volatile int cpu_number_map[NR_CPUS];
+extern volatile int __cpu_logical_map[NR_CPUS];
+
+#define cpu_logical_map(i)	__cpu_logical_map[i]
+
+#if defined(CONFIG_KDB)
+extern volatile unsigned long smp_kdb_wait;
+#endif  /* CONFIG_KDB */
+
+extern unsigned long ap_wakeup_vector;
+
+/*
+ * XTP control functions:
+ *    min_xtp   :  route all interrupts to this CPU
+ *    normal_xtp:  nominal XTP value
+ *    raise_xtp :  Route all interrupts away from this CPU
+ *    max_xtp   :  never deliver interrupts to this CPU.
+ */
+
+/* 
+ * This turns off XTP based interrupt routing.  There is a bug in the handling of 
+ * IRQ_INPROGRESS when the same vector appears on more than one CPU. 
+ */
+extern int use_xtp;
+
+extern __inline void 
+min_xtp(void)
+{
+	if (use_xtp)
+		writeb(0x80, ipi_base_addr | XTP_OFFSET); /* XTP to min */
+}
+
+extern __inline void
+normal_xtp(void)
+{
+	if (use_xtp)
+		writeb(0x8e, ipi_base_addr | XTP_OFFSET); /* XTP normal */
+}
+
+extern __inline void
+max_xtp(void) 
+{
+	if (use_xtp)
+		writeb(0x8f, ipi_base_addr | XTP_OFFSET); /* Set XTP to max... */
+}
+
+extern __inline unsigned int 
+hard_smp_processor_id(void)
+{
+	struct {
+		unsigned long reserved : 16;
+		unsigned long eid : 8;
+		unsigned long id  : 8;
+		unsigned long ignored : 32;
+	} lid;
+
+	__asm__ __volatile__ ("mov %0=cr.lid" : "=r" (lid));
+
+	/*
+	 * Damn.  IA64 CPU ID's are 16 bits long, Linux expect the hard id to be 
+	 * in the range 0..31.  So, return the low-order bits of the bus-local ID 
+	 * only and hope it's less than 32. This needs to be fixed...
+	 */
+	return (lid.id & 0x0f);
+}
+
+#define NO_PROC_ID 0xffffffff
+#define PROC_CHANGE_PENALTY 20
+
+extern void __init init_smp_config (void);
+extern void smp_do_timer (struct pt_regs *regs);
+
+#endif /* _ASM_IA64_SMP_H */