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authorJames Hogan <james.hogan@imgtec.com>2013-03-26 14:40:58 +0000
committerJames Hogan <james.hogan@imgtec.com>2013-03-27 14:37:53 +0000
commit82bbb8325a232e29e1c2ae09200384ddb989c0d5 (patch)
treee0304e1c7c63c9b5c253ef2d5eb1cda5120ca31f
parente605ff8c1a785f49801ad903846f62e609f954f7 (diff)
metag: add exported <asm/ech.h> for extended context handling
Add an exported header file <asm/ech.h> containing the definitions of some bits which can be set in D0.8 to indicate to the kernel that certain DSP state should be preserved. The definitions have the same names and values as the ones in the kernel-internal <asm/tbx.h>, to make it easier for DSP assembly code to be compatible between Linux and non-Linux operating systems. Signed-off-by: James Hogan <james.hogan@imgtec.com>
-rw-r--r--arch/metag/include/uapi/asm/Kbuild1
-rw-r--r--arch/metag/include/uapi/asm/ech.h15
2 files changed, 16 insertions, 0 deletions
diff --git a/arch/metag/include/uapi/asm/Kbuild b/arch/metag/include/uapi/asm/Kbuild
index 876c71f866de..84e09feb4d54 100644
--- a/arch/metag/include/uapi/asm/Kbuild
+++ b/arch/metag/include/uapi/asm/Kbuild
@@ -2,6 +2,7 @@
include include/uapi/asm-generic/Kbuild.asm
header-y += byteorder.h
+header-y += ech.h
header-y += ptrace.h
header-y += resource.h
header-y += sigcontext.h
diff --git a/arch/metag/include/uapi/asm/ech.h b/arch/metag/include/uapi/asm/ech.h
new file mode 100644
index 000000000000..ac94d1cf9be4
--- /dev/null
+++ b/arch/metag/include/uapi/asm/ech.h
@@ -0,0 +1,15 @@
+#ifndef _UAPI_METAG_ECH_H
+#define _UAPI_METAG_ECH_H
+
+/*
+ * These bits can be set in the top half of the D0.8 register when DSP context
+ * switching is enabled, in order to support partial DSP context save/restore.
+ */
+
+#define TBICTX_XEXT_BIT 0x1000 /* Enable extended context save */
+#define TBICTX_XTDP_BIT 0x0800 /* DSP accumulators/RAM/templates */
+#define TBICTX_XHL2_BIT 0x0400 /* Hardware loops */
+#define TBICTX_XAXX_BIT 0x0200 /* Extended AX registers (A*.4-7) */
+#define TBICTX_XDX8_BIT 0x0100 /* Extended DX registers (D*.8-15) */
+
+#endif /* _UAPI_METAG_ECH_H */