metag: add exported <asm/ech.h> for extended context handling (82bbb832) · Commits · 戴 / test

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>

arch/metag/include/uapi/asm/Kbuild

+1 −0

Original line number	Diff line number	Diff line
		@@ -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

arch/metag/include/uapi/asm/ech.h

0 → 100644

+15 −0

Original line number	Diff line number	Diff line
		#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 */

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