lkml.org 
[lkml]   [2004]   [Apr]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[RFC/PATCH] FUSYN 4/11: Support for ia64
 arch/ia64/kernel/entry.S  |   10 +++---
include/asm-ia64/fulock.h | 75 ++++++++++++++++++++++++++++++++++++++++++++++
include/asm-ia64/unistd.h | 8 ++++
3 files changed, 87 insertions(+), 6 deletions(-)

--- include/asm-ia64/unistd.h:1.1.1.7 Tue Apr 6 00:22:52 2004
+++ include/asm-ia64/unistd.h Tue Apr 6 02:16:25 2004
@@ -248,13 +248,19 @@
#define __NR_clock_nanosleep 1256
#define __NR_fstatfs64 1257
#define __NR_statfs64 1258
+/* Hole: 1259 */
#define __NR_reserved1 1259 /* reserved for NUMA interface */
#define __NR_reserved2 1260 /* reserved for NUMA interface */
#define __NR_reserved3 1261 /* reserved for NUMA interface */
+#define __NR_ufulock_lock 1262
+#define __NR_ufulock_unlock 1263
+#define __NR_ufulock_ctl 1264
+#define __NR_ufuqueue_wait 1265
+#define __NR_ufuqueue_wake 1266

#ifdef __KERNEL__

-#define NR_syscalls 256 /* length of syscall table */
+#define NR_syscalls 265 /* length of syscall table */

#if !defined(__ASSEMBLY__) && !defined(ASSEMBLER)

--- arch/ia64/kernel/entry.S:1.1.1.8 Tue Apr 6 00:21:45 2004
+++ arch/ia64/kernel/entry.S Tue Apr 6 02:15:29 2004
@@ -1502,11 +1502,11 @@
data8 sys_fstatfs64
data8 sys_statfs64
data8 sys_ni_syscall
- data8 sys_ni_syscall // 1260
- data8 sys_ni_syscall
- data8 sys_ni_syscall
- data8 sys_ni_syscall
- data8 sys_ni_syscall
+ data8 sys_ufulock_lock // 1260
+ data8 sys_ufulock_unlock
+ data8 sys_ufulock_ctl
+ data8 sys_ufuqueue_wait
+ data8 sys_ufuqueue_wake
data8 sys_ni_syscall // 1265
data8 sys_ni_syscall
data8 sys_ni_syscall
--- /dev/null Thu Apr 15 00:58:25 2004
+++ include/asm-ia64/fulock.h Mon Feb 2 23:07:33 2004
@@ -0,0 +1,75 @@
+
+/*
+ * Fast User real-time/pi/pp/robust/deadlock SYNchronization
+ * (C) 2002-2003 Intel Corp
+ * David P. Howell <david.p.howell@intel.com>
+ *
+ * Licensed under the FSF's GNU Public License v2 or later.
+ *
+ * Based on normal futexes (futex.c), (C) Rusty Russell.
+ * Please refer to Documentation/fusyn.txt for more info.
+ */
+
+#ifndef __asm_ia64_fulock_h__
+#define __asm_ia64_fulock_h__
+
+ /* fulock value / state; anything that is not this is a PID that
+ * currently owns the fulock. */
+
+enum vfulock {
+ VFULOCK_UNLOCKED = 0x00000000, /* Unlocked */
+ VFULOCK_HEALTHY = VFULOCK_UNLOCKED, /* KCO mode: the lock is healthy */
+ VFULOCK_WP = 0xfffffffd, /* Waiters blocked in the kernel */
+ VFULOCK_DEAD = 0xfffffffe, /* dead, kernel controls ownership */
+ VFULOCK_NR = 0xffffffff /* fulock is not-recoverable */
+};
+
+
+#ifdef __KERNEL__
+
+/**
+ * [User usable] Atomic compare and swap.
+ *
+ * Used for locking a vfulock.
+ *
+ * @value Pointer to the value to compare and swap.
+ * @old_value Value that *value has to have for the swap to occur.
+ * @new_value New value to set it *value == old_value.
+ * @return !0 if the swap succeeded. 0 if failed.
+ */
+static inline
+unsigned vfulock_acas (volatile unsigned *value,
+ unsigned old_value, unsigned new_value)
+{
+ unsigned retval;
+
+ /* The following should be the expansion of the cmpxchg_acq() */
+ /* macro from intrinsics.h. Needed this due to glibc builds */
+ /* issues with including asm/types.h. */
+ asm volatile ("mov ar.ccv=%0;;" :: "rO"(old_value));
+ asm volatile ("cmpxchg4.acq %0=[%1],%2,ar.ccv"
+ : "=r"(retval)
+ : "r"(value),
+ "r"(new_value)
+ : "memory");
+ return retval == old_value;
+}
+
+
+/**
+ * Set an ufulock's associated value.
+ *
+ * @vfulock: Pointer to the address of the ufulock to contain for.
+ * @value: New value to assign.
+ *
+ * Wrapper for arch-specific idiosyncrasies when setting a value that
+ * is shared across different address mappings.
+ */
+static inline
+void vfulock_set (volatile unsigned *vfulock, unsigned value)
+{
+ *vfulock = value;
+}
+
+#endif /* #ifdef __KERNEL__ */
+#endif /* #ifndef __asm_ia64_fulock_h__ */
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
\
 
 \ /
  Last update: 2005-03-22 14:02    [W:0.062 / U:0.968 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site