summaryrefslogtreecommitdiff
path: root/arch/blackfin/include/asm/l1layout.h
diff options
context:
space:
mode:
authorDavid S. Miller <davem@davemloft.net>2008-09-09 03:59:05 +0400
committerDavid S. Miller <davem@davemloft.net>2008-09-09 03:59:05 +0400
commit17dce5dfe38ae2fb359b61e855f5d8a3a8b7892b (patch)
tree88bb1fcf84f9ebfa4299c9a8dcd9e6330b358446 /arch/blackfin/include/asm/l1layout.h
parent712d6954e3998d0de2840d8130941e8042541246 (diff)
parent82a28c794f27aac17d7a3ebd7f14d731a11a5532 (diff)
downloadlinux-17dce5dfe38ae2fb359b61e855f5d8a3a8b7892b.tar.xz
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts: net/mac80211/mlme.c
Diffstat (limited to 'arch/blackfin/include/asm/l1layout.h')
-rw-r--r--arch/blackfin/include/asm/l1layout.h31
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/l1layout.h b/arch/blackfin/include/asm/l1layout.h
new file mode 100644
index 000000000000..c13ded777828
--- /dev/null
+++ b/arch/blackfin/include/asm/l1layout.h
@@ -0,0 +1,31 @@
+/*
+ * l1layout.h
+ * Defines a layout of L1 scratchpad memory that userspace can rely on.
+ */
+
+#ifndef _L1LAYOUT_H_
+#define _L1LAYOUT_H_
+
+#include <asm/blackfin.h>
+
+#ifndef __ASSEMBLY__
+
+/* Data that is "mapped" into the process VM at the start of the L1 scratch
+ memory, so that each process can access it at a fixed address. Used for
+ stack checking. */
+struct l1_scratch_task_info
+{
+ /* Points to the start of the stack. */
+ void *stack_start;
+ /* Not updated by the kernel; a user process can modify this to
+ keep track of the lowest address of the stack pointer during its
+ runtime. */
+ void *lowest_sp;
+};
+
+/* A pointer to the structure in memory. */
+#define L1_SCRATCH_TASK_INFO ((struct l1_scratch_task_info *)L1_SCRATCH_START)
+
+#endif
+
+#endif