metag: Remove arch/metag/

The earliest Meta architecture port of Linux I have a record of was an
import of a Meta port of Linux v2.4.1 in February 2004, which was worked
on significantly over the next few years by Graham Whaley, Will Newton,
Matt Fleming, myself and others.

Eventually the port was merged into mainline in v3.9 in March 2013, not
long after Imagination Technologies bought MIPS Technologies and shifted
its CPU focus over to the MIPS architecture.

As a result, though the port was maintained for a while, kept on life
support for a while longer, and useful for testing a few specific
drivers for which I don't have ready access to the equivalent MIPS
hardware, it is now essentially dead with no users.

It is also stuck using an out-of-tree toolchain based on GCC 4.2.4 which
is no longer maintained, now struggles to build modern kernels due to
toolchain bugs, and doesn't itself build with a modern GCC. The latest
buildroot port is still using an old uClibc snapshot which is no longer
served, and the latest uClibc doesn't build with GCC 4.2.4.

So lets call it a day and drop the Meta architecture port from the
kernel. RIP Meta.

Signed-off-by: James Hogan <jhogan@kernel.org>
Link: https://lkml.kernel.org/r/95906b76-6ce1-3f84-eaba-c29b4ae952eb@roeck-us.net
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Graham Whaley <graham.whaley@gmail.com>
Cc: linux-metag@vger.kernel.org

1 files changed, 0 insertions, 190 deletions

diff --git a/arch/metag/tbx/tbictxfpu.S b/arch/metag/tbx/tbictxfpu.S
deleted file mode 100644
index e773bea..0000000
--- a/arch/metag/tbx/tbictxfpu.S
+++ /dev/null
@@ -1,190 +0,0 @@
-/*
- * tbictxfpu.S
- *
- * Copyright (C) 2009, 2012 Imagination Technologies.
- *
- * This program is free software; you can redistribute it and/or modify it under
- * the terms of the GNU General Public License version 2 as published by the
- * Free Software Foundation.
- *
- * Explicit state save and restore routines forming part of the thread binary
- * interface for META processors
- */
-
-	.file	"tbifpuctx.S"
-
-#include <asm/metag_regs.h>
-#include <asm/tbx.h>
-
-#ifdef TBI_1_4
-/*
- * void *__TBICtxFPUSave( TBIRES State, void *pExt )
- *
- *                 D0Ar2 contains TBICTX_*_BIT values that control what
- *                    extended data is to be saved.
- *                 These bits must be ored into the SaveMask of this structure.
- *
- *                 Virtually all possible scratch registers are used.
- */
-	.text
-	.balign	4
-	.global	___TBICtxFPUSave
-	.type	___TBICtxFPUSave,function
-___TBICtxFPUSave:
-
-	/* D1Ar1:D0Ar2 - State
-	 * D1Ar3       - pExt
-	 * D0Ar4       - Value of METAC_CORE_ID
-	 * D1Ar5       - Scratch
-	 * D0Ar6       - Scratch
-	 */
-	
-	/* If the FPAC bit isnt set then there is nothing to do */
-	TSTT	D0Ar2,#TBICTX_FPAC_BIT
-	MOVZ	PC, D1RtP
-
-	/* Obtain the Core config */
-	MOVT	D0Ar4,        #HI(METAC_CORE_ID)
-	ADD	D0Ar4, D0Ar4, #LO(METAC_CORE_ID)
-	GETD	D0Ar4, [D0Ar4]
-
-	/* Detect FX.8 - FX.15 and add to core config */
-	MOV	D0Ar6, TXENABLE
-	AND	D0Ar6, D0Ar6, #(TXENABLE_CLASSALT_FPUR8 << TXENABLE_CLASS_S)
-	AND	D0Ar4, D0Ar4, #LO(0x0000FFFF)
-	ORT	D0Ar4, D0Ar4, #HI(TBICTX_CFGFPU_FX16_BIT)
-	XOR	D0Ar4, D0Ar4, D0Ar6
-
-	/* Save the relevant bits to the buffer */
-	SETD	[D1Ar3++], D0Ar4
-
-	/* Save the relevant bits of TXDEFR (Assumes TXDEFR is coherent) ... */
-	MOV	D0Ar6, TXDEFR
-	LSR	D0Re0, D0Ar6, #8
-	AND	D0Re0, D0Re0, #LO(TXDEFR_FPE_FE_BITS>>8)
-	AND	D0Ar6, D0Ar6, #LO(TXDEFR_FPE_ICTRL_BITS)
-	OR	D0Re0, D0Re0, D0Ar6
-
-	/* ... along with relevant bits of TXMODE to buffer */
-	MOV	D0Ar6, TXMODE
-	ANDT	D0Ar6, D0Ar6, #HI(TXMODE_FPURMODE_BITS)
-	ORT	D0Ar6, D0Ar6, #HI(TXMODE_FPURMODEWRITE_BIT)
-	OR	D0Ar6, D0Ar6, D0Re0
-	SETD	[D1Ar3++], D0Ar6
-
-	GETD	D0Ar6,[D1Ar1+#TBICTX_SaveMask-2] /* Get the current SaveMask */
-	/* D0Ar6       - pCtx->SaveMask */
-
-	TSTT	D0Ar4, #HI(TBICTX_CFGFPU_FX16_BIT) /* Perform test here for extended FPU registers
-	    	                                    * to avoid stalls
-	    	                                    */
-	/* Save the standard FPU registers */
-F	MSETL	[D1Ar3++], FX.0, FX.2, FX.4, FX.6
-
-	/* Save the extended FPU registers if they are present */
-	BZ	$Lskip_save_fx8_fx16
-F	MSETL	[D1Ar3++], FX.8, FX.10, FX.12, FX.14
-$Lskip_save_fx8_fx16:
-
-	/* Save the FPU Accumulator if it is present */
-	TST	D0Ar4, #METAC_COREID_NOFPACC_BIT
-	BNZ	$Lskip_save_fpacc
-F	SETL	[D1Ar3++], ACF.0
-F	SETL	[D1Ar3++], ACF.1
-F	SETL	[D1Ar3++], ACF.2
-$Lskip_save_fpacc:
-
-	/* Update pCtx->SaveMask */
-	ANDT	D0Ar2, D0Ar2, #TBICTX_FPAC_BIT
-	OR	D0Ar6, D0Ar6, D0Ar2
-	SETD	[D1Ar1+#TBICTX_SaveMask-2],D0Ar6/* Add in XCBF bit to TBICTX */
-
-	MOV	D0Re0, D1Ar3 /* Return end of save area */
-	MOV	PC, D1RtP
-
-	.size	___TBICtxFPUSave,.-___TBICtxFPUSave
-
-/*
- * void *__TBICtxFPURestore( TBIRES State, void *pExt )
- *
- *                 D0Ar2 contains TBICTX_*_BIT values that control what
- *                    extended data is to be recovered from D1Ar3 (pExt).
- *
- *                 Virtually all possible scratch registers are used.
- */
-/*
- * If TBICTX_XEXT_BIT is specified in State. Then the saved state of
- *       the orginal A0.2 and A1.2 is restored from pExt and the XEXT
- *       related flags are removed from State.pCtx->SaveMask.
- *
- */
-	.balign	4
-	.global	___TBICtxFPURestore
-	.type	___TBICtxFPURestore,function
-___TBICtxFPURestore:
-
-	/* D1Ar1:D0Ar2 - State
-	 * D1Ar3       - pExt
-	 * D0Ar4       - Value of METAC_CORE_ID
-	 * D1Ar5       - Scratch
-	 * D0Ar6       - Scratch
-	 * D1Re0       - Scratch
-	 */
-
-	/* If the FPAC bit isnt set then there is nothing to do */
-	TSTT	D0Ar2,#TBICTX_FPAC_BIT
-	MOVZ	PC, D1RtP
-
-	/* Obtain the relevant bits of the Core config */
-	GETD	D0Ar4, [D1Ar3++]
-
-	/* Restore FPU related parts of TXDEFR. Assumes TXDEFR is coherent */
-	GETD	D1Ar5, [D1Ar3++]
-	MOV	D0Ar6, D1Ar5
-	LSL	D1Re0, D1Ar5, #8
-	ANDT	D1Re0, D1Re0, #HI(TXDEFR_FPE_FE_BITS|TXDEFR_FPE_ICTRL_BITS)
-	AND	D1Ar5, D1Ar5, #LO(TXDEFR_FPE_FE_BITS|TXDEFR_FPE_ICTRL_BITS)
-	OR	D1Re0, D1Re0, D1Ar5
-
-	MOV	D1Ar5, TXDEFR
-	ANDMT	D1Ar5, D1Ar5, #HI(~(TXDEFR_FPE_FE_BITS|TXDEFR_FPE_ICTRL_BITS))
-	ANDMB	D1Ar5, D1Ar5, #LO(~(TXDEFR_FPE_FE_BITS|TXDEFR_FPE_ICTRL_BITS))
-	OR	D1Re0, D1Re0, D1Ar5
-	MOV	TXDEFR, D1Re0
-
-	/* Restore relevant bits of TXMODE */
-	MOV	D1Ar5, TXMODE
-	ANDMT	D1Ar5, D1Ar5, #HI(~TXMODE_FPURMODE_BITS)
-	ANDT	D0Ar6, D0Ar6, #HI(TXMODE_FPURMODE_BITS|TXMODE_FPURMODEWRITE_BIT)
-	OR	D0Ar6, D0Ar6, D1Ar5
-	MOV	TXMODE, D0Ar6
-
-	TSTT	D0Ar4, #HI(TBICTX_CFGFPU_FX16_BIT) /* Perform test here for extended FPU registers
-	    	                                    * to avoid stalls
-	    	                                    */
-	/* Save the standard FPU registers */
-F	MGETL	FX.0, FX.2, FX.4, FX.6, [D1Ar3++]
-
-	/* Save the extended FPU registers if they are present */
-	BZ	$Lskip_restore_fx8_fx16
-F	MGETL	FX.8, FX.10, FX.12, FX.14, [D1Ar3++]
-$Lskip_restore_fx8_fx16:
-
-	/* Save the FPU Accumulator if it is present */
-	TST	D0Ar4, #METAC_COREID_NOFPACC_BIT
-	BNZ	$Lskip_restore_fpacc
-F	GETL	ACF.0, [D1Ar3++]
-F	GETL	ACF.1, [D1Ar3++]
-F	GETL	ACF.2, [D1Ar3++]
-$Lskip_restore_fpacc:
-
-	MOV	D0Re0, D1Ar3 /* Return end of save area */
-	MOV	PC, D1RtP
-
-	.size	___TBICtxFPURestore,.-___TBICtxFPURestore
-
-#endif /* TBI_1_4 */
-
-/*
- * End of tbictx.S
- */