patch-2.4.2 linux/include/asm-s390x/sigp.h

• Lines: 160
• Date: Tue Feb 13 14:13:44 2001
• Orig file: v2.4.1/linux/include/asm-s390x/sigp.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.1/linux/include/asm-s390x/sigp.h linux/include/asm-s390x/sigp.h
@@ -0,0 +1,159 @@
+/*
+ *  include/asm-s390/sigp.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)
+ *
+ *  sigp.h by D.J. Barrow (c) IBM 1999
+ *  contains routines / structures for signalling other S/390 processors in an
+ *  SMP configuration.
+ */
+
+#ifndef __SIGP__
+#define __SIGP__
+
+#include <asm/ptrace.h>
+#include <asm/misc390.h>
+#include <asm/atomic.h>
+
+/* get real cpu address from logical cpu number */
+extern volatile int __cpu_logical_map[];
+
+typedef enum
+{
+	sigp_unassigned=0x0,
+	sigp_sense,
+	sigp_external_call,
+	sigp_emergency_signal,
+	sigp_start,
+	sigp_stop,
+	sigp_restart,
+	sigp_unassigned1,
+	sigp_unassigned2,
+	sigp_stop_and_store_status,
+	sigp_unassigned3,
+	sigp_initial_cpu_reset,
+	sigp_cpu_reset,
+	sigp_set_prefix,
+	sigp_store_status_at_address,
+	sigp_store_extended_status_at_address
+} sigp_order_code;
+
+typedef __u32 sigp_status_word;
+
+typedef enum
+{
+        sigp_order_code_accepted=0,
+	sigp_status_stored,
+	sigp_busy,
+	sigp_not_operational
+} sigp_ccode;
+
+
+/*
+ * Definitions for the external call
+ */
+
+/* 'Bit' signals, asynchronous */
+typedef enum
+{
+	ec_schedule=0,
+        ec_restart,
+        ec_halt,
+        ec_power_off,
+	ec_bit_last
+} ec_bit_sig;
+
+/* Signals which come with a parameter area */
+typedef enum
+{
+        ec_callback_sync,
+        ec_callback_async
+} ec_cmd_sig;
+
+/* state information for signals */
+typedef enum
+{
+	ec_pending,
+	ec_executing,
+	ec_done
+} ec_state;
+
+/* header for the queuing of callbacks */
+typedef struct ec_ext_call
+{
+	ec_cmd_sig cmd;
+	atomic_t status;
+	struct ec_ext_call *next;
+	void (*func)(void *info);
+	void *info;
+} ec_ext_call;
+
+/*
+ * Signal processor
+ */
+extern __inline__ sigp_ccode
+signal_processor(__u16 cpu_addr, sigp_order_code order_code)
+{
+	sigp_ccode ccode;
+
+	__asm__ __volatile__(
+		"    sgr    1,1\n"        /* parameter=0 in gpr 1 */
+		"    sigp   1,%1,0(%2)\n"
+		"    ipm    %0\n"
+		"    srl    %0,28"
+		: "=d" (ccode)
+		: "d" (__cpu_logical_map[cpu_addr]), "a" (order_code)
+		: "cc" , "memory", "1" );
+	return ccode;
+}
+
+/*
+ * Signal processor with parameter
+ */
+extern __inline__ sigp_ccode
+signal_processor_p(__u64 parameter,__u16 cpu_addr,sigp_order_code order_code)
+{
+	sigp_ccode ccode;
+	
+	__asm__ __volatile__(
+		"    lgr    1,%1\n"       /* parameter in gpr 1 */
+		"    sigp   1,%2,0(%3)\n"
+		"    ipm    %0\n"
+		"    srl    %0,28\n"
+		: "=d" (ccode)
+		: "d" (parameter), "d" (__cpu_logical_map[cpu_addr]),
+                  "a" (order_code)
+		: "cc" , "memory", "1" );
+	return ccode;
+}
+
+/*
+ * Signal processor with parameter and return status
+ */
+extern __inline__ sigp_ccode
+signal_processor_ps(__u32 *statusptr, __u64 parameter,
+		    __u16 cpu_addr, sigp_order_code order_code)
+{
+	sigp_ccode ccode;
+	
+	__asm__ __volatile__(
+		"    sgr    2,2\n"        /* clear status so it doesn't contain rubbish if not saved. */
+		"    lgr    3,%2\n"       /* parameter in gpr 3 */
+		"    sigp   2,%3,0(%4)\n"
+		"    stg    2,%1\n"
+		"    ipm    %0\n"
+		"    srl    %0,28\n"
+		: "=d" (ccode), "=m" (*statusptr)
+		: "d" (parameter), "d" (__cpu_logical_map[cpu_addr]),
+                  "a" (order_code)
+		: "cc" , "memory", "2" , "3"
+		);
+   return ccode;
+}
+
+#endif __SIGP__
+
+