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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-s390/sigp.h
downloadlwn-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
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Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'include/asm-s390/sigp.h')
-rw-r--r--include/asm-s390/sigp.h131
1 files changed, 131 insertions, 0 deletions
diff --git a/include/asm-s390/sigp.h b/include/asm-s390/sigp.h
new file mode 100644
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+++ b/include/asm-s390/sigp.h
@@ -0,0 +1,131 @@
+/*
+ * 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)
+ * Heiko Carstens (heiko.carstens@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/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_call_function,
+ ec_bit_last
+} ec_bit_sig;
+
+/*
+ * Signal processor
+ */
+extern __inline__ sigp_ccode
+signal_processor(__u16 cpu_addr, sigp_order_code order_code)
+{
+ sigp_ccode ccode;
+
+ __asm__ __volatile__(
+ " sr 1,1\n" /* parameter=0 in gpr 1 */
+ " sigp 1,%1,0(%2)\n"
+ " ipm %0\n"
+ " srl %0,28\n"
+ : "=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(__u32 parameter, __u16 cpu_addr,
+ sigp_order_code order_code)
+{
+ sigp_ccode ccode;
+
+ __asm__ __volatile__(
+ " lr 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, __u32 parameter,
+ __u16 cpu_addr, sigp_order_code order_code)
+{
+ sigp_ccode ccode;
+
+ __asm__ __volatile__(
+ " sr 2,2\n" /* clear status */
+ " lr 3,%2\n" /* parameter in gpr 3 */
+ " sigp 2,%3,0(%4)\n"
+ " st 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__ */