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 5/11: Support for ppc
 arch/ppc/kernel/misc.S   |   11 +++++--
include/asm-ppc/fulock.h | 68 +++++++++++++++++++++++++++++++++++++++++++++++
include/asm-ppc/unistd.h | 7 ++++
3 files changed, 82 insertions(+), 4 deletions(-)
--- /dev/null Thu Apr 15 00:58:25 2004
+++ include/asm-ppc/fulock.h Tue Apr 6 02:30:02 2004
@@ -0,0 +1,68 @@
+
+/*
+ * Fast User real-time/pi/pp/robust/deadlock SYNchronization
+ * (C) 2002-2003 Intel Corp
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@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_ppc_fulock_h__
+#define __asm_ppc_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, /* kernel controls ownership */
+ 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 result;
+
+ result = cmpxchg (value, old_value, new_value);
+ return result == 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_ppc_fulock_h__ */
--- include/asm-ppc/unistd.h:1.1.1.4 Tue Apr 6 00:22:57 2004
+++ include/asm-ppc/unistd.h Tue Apr 6 02:16:30 2004
@@ -260,8 +260,13 @@
#define __NR_fstatfs64 253
#define __NR_fadvise64_64 254
#define __NR_rtas 255
+#define __NR_ufulock_lock 256
+#define __NR_ufulock_unlock 257
+#define __NR_ufulock_ctl 258
+#define __NR_ufuqueue_wait 259
+#define __NR_ufuqueue_wake 260

-#define __NR_syscalls 256
+#define __NR_syscalls 261

#define __NR(n) #n

--- arch/ppc/kernel/misc.S:1.1.1.5 Tue Apr 6 00:22:00 2004
+++ arch/ppc/kernel/misc.S Tue Apr 6 02:15:36 2004
@@ -292,7 +292,7 @@
* sense anyway.
* -- Cort
*/
- mfmsr r4
+ mfmsr r4
/* Copy all except the MSR_EE bit from r4 (current MSR value)
to r3. This is the sort of thing the rlwimi instruction is
designed for. -- paulus. */
@@ -976,7 +976,7 @@
* R5 has shift count
* result in R3/R4
*
- * ashrdi3: arithmetic right shift (sign propagation)
+ * ashrdi3: arithmetic right shift (sign propagation)
* lshrdi3: logical right shift
* ashldi3: left shift
*/
@@ -1314,7 +1314,7 @@
.long sys_fstat64
.long sys_pciconfig_read
.long sys_pciconfig_write
- .long sys_pciconfig_iobase /* 200 */
+ .long sys_pciconfig_iobase /* 200 */
.long sys_ni_syscall /* 201 - reserved - MacOnLinux - new */
.long sys_getdents64
.long sys_pivot_root
@@ -1370,3 +1370,8 @@
.long sys_fstatfs64
.long ppc_fadvise64_64
.long sys_ni_syscall /* 255 - rtas (used on ppc64) */
+ .long sys_ufulock_lock
+ .long sys_ufulock_unlock
+ .long sys_ufulock_ctl
+ .long sys_ufuqueue_wait
+ .long sys_ufuqueue_wake /* 260 */
-
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:0.220 / U:0.652 seconds]
©2003-2014 Jasper Spaans. hosted at Digital Ocean