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is no longer maintained, now struggles to build modern kernels due to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, 201 deletions

diff --git a/arch/metag/include/asm/processor.h b/arch/metag/include/asm/processor.h
deleted file mode 100644
index 9a0c502cd4a0..000000000000
--- a/arch/metag/include/asm/processor.h
+++ /dev/null
@@ -1,201 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Copyright (C) 2005,2006,2007,2008 Imagination Technologies
- */
-
-#ifndef __ASM_METAG_PROCESSOR_H
-#define __ASM_METAG_PROCESSOR_H
-
-#include <linux/atomic.h>
-
-#include <asm/page.h>
-#include <asm/ptrace.h>
-#include <asm/metag_regs.h>
-
-/*
- * Default implementation of macro that returns current
- * instruction pointer ("program counter").
- */
-#define current_text_addr() ({ __label__ _l; _l: &&_l; })
-
-/* The task stops where the kernel starts */
-#define TASK_SIZE	PAGE_OFFSET
-/* Add an extra page of padding at the top of the stack for the guard page. */
-#define STACK_TOP	(TASK_SIZE - PAGE_SIZE)
-#define STACK_TOP_MAX	STACK_TOP
-/* Maximum virtual space for stack */
-#define STACK_SIZE_MAX	(CONFIG_MAX_STACK_SIZE_MB*1024*1024)
-
-/* This decides where the kernel will search for a free chunk of vm
- * space during mmap's.
- */
-#define TASK_UNMAPPED_BASE	META_MEMORY_BASE
-
-typedef struct {
-	unsigned long seg;
-} mm_segment_t;
-
-#ifdef CONFIG_METAG_FPU
-struct meta_fpu_context {
-	TBICTXEXTFPU fpstate;
-	union {
-		struct {
-			TBICTXEXTBB4 fx8_15;
-			TBICTXEXTFPACC fpacc;
-		} fx8_15;
-		struct {
-			TBICTXEXTFPACC fpacc;
-			TBICTXEXTBB4 unused;
-		} nofx8_15;
-	} extfpstate;
-	bool needs_restore;
-};
-#else
-struct meta_fpu_context {};
-#endif
-
-#ifdef CONFIG_METAG_DSP
-struct meta_ext_context {
-	struct {
-		TBIEXTCTX ctx;
-		TBICTXEXTBB8 bb8;
-		TBIDUAL ax[TBICTXEXTAXX_BYTES / sizeof(TBIDUAL)];
-		TBICTXEXTHL2 hl2;
-		TBICTXEXTTDPR ext;
-		TBICTXEXTRP6 rp;
-	} regs;
-
-	/* DSPRAM A and B save areas. */
-	void *ram[2];
-
-	/* ECH encoded size of DSPRAM save areas. */
-	unsigned int ram_sz[2];
-};
-#else
-struct meta_ext_context {};
-#endif
-
-struct thread_struct {
-	PTBICTX kernel_context;
-	/* A copy of the user process Sig.SaveMask. */
-	unsigned int user_flags;
-	struct meta_fpu_context *fpu_context;
-	void __user *tls_ptr;
-	unsigned short int_depth;
-	unsigned short txdefr_failure;
-	struct meta_ext_context *dsp_context;
-};
-
-#define INIT_THREAD  { \
-	NULL,			/* kernel_context */	\
-	0,			/* user_flags */	\
-	NULL,			/* fpu_context */	\
-	NULL,			/* tls_ptr */		\
-	1,			/* int_depth - we start in kernel */	\
-	0,			/* txdefr_failure */	\
-	NULL,			/* dsp_context */	\
-}
-
-/* Needed to make #define as we are referencing 'current', that is not visible
- * yet.
- *
- * Stack layout is as below.
-
-      argc            argument counter (integer)
-      argv[0]         program name (pointer)
-      argv[1...N]     program args (pointers)
-      argv[argc-1]    end of args (integer)
-      NULL
-      env[0...N]      environment variables (pointers)
-      NULL
-
- */
-#define start_thread(regs, pc, usp) do {				   \
-	unsigned int *argc = (unsigned int *) bprm->exec;		   \
-	current->thread.int_depth = 1;					   \
-	/* Force this process down to user land */			   \
-	regs->ctx.SaveMask = TBICTX_PRIV_BIT;				   \
-	regs->ctx.CurrPC = pc;						   \
-	regs->ctx.AX[0].U0 = usp;					   \
-	regs->ctx.DX[3].U1 = *((int *)argc);			/* argc */ \
-	regs->ctx.DX[3].U0 = (int)((int *)argc + 1);		/* argv */ \
-	regs->ctx.DX[2].U1 = (int)((int *)argc +			   \
-				   regs->ctx.DX[3].U1 + 2);	/* envp */ \
-	regs->ctx.DX[2].U0 = 0;				   /* rtld_fini */ \
-} while (0)
-
-/* Forward declaration, a strange C thing */
-struct task_struct;
-
-/* Free all resources held by a thread. */
-static inline void release_thread(struct task_struct *dead_task)
-{
-}
-
-/*
- * Return saved PC of a blocked thread.
- */
-#define	thread_saved_pc(tsk)	\
-	((unsigned long)(tsk)->thread.kernel_context->CurrPC)
-#define thread_saved_sp(tsk)	\
-	((unsigned long)(tsk)->thread.kernel_context->AX[0].U0)
-#define thread_saved_fp(tsk)	\
-	((unsigned long)(tsk)->thread.kernel_context->AX[1].U0)
-
-unsigned long get_wchan(struct task_struct *p);
-
-#define	KSTK_EIP(tsk)	(task_pt_regs(tsk)->ctx.CurrPC)
-#define	KSTK_ESP(tsk)	(task_pt_regs(tsk)->ctx.AX[0].U0)
-
-#define user_stack_pointer(regs)        ((regs)->ctx.AX[0].U0)
-
-#define cpu_relax()     barrier()
-
-extern void setup_priv(void);
-
-static inline unsigned int hard_processor_id(void)
-{
-	unsigned int id;
-
-	asm volatile ("MOV	%0, TXENABLE\n"
-		      "AND	%0, %0, %1\n"
-		      "LSR	%0, %0, %2\n"
-		      : "=&d" (id)
-		      : "I" (TXENABLE_THREAD_BITS),
-			"K" (TXENABLE_THREAD_S)
-		      );
-
-	return id;
-}
-
-#define OP3_EXIT	0
-
-#define HALT_OK		0
-#define HALT_PANIC	-1
-
-/*
- * Halt (stop) the hardware thread. This instruction sequence is the
- * standard way to cause a Meta hardware thread to exit. The exit code
- * is pushed onto the stack which is interpreted by the debug adapter.
- */
-static inline void hard_processor_halt(int exit_code)
-{
-	asm volatile ("MOV	D1Ar1, %0\n"
-		      "MOV	D0Ar6, %1\n"
-		      "MSETL	[A0StP],D0Ar6,D0Ar4,D0Ar2\n"
-		      "1:\n"
-		      "SWITCH	#0xC30006\n"
-		      "B		1b\n"
-		      : : "r" (exit_code), "K" (OP3_EXIT));
-}
-
-/* Set these hooks to call SoC specific code to restart/halt/power off. */
-extern void (*soc_restart)(char *cmd);
-extern void (*soc_halt)(void);
-
-extern void show_trace(struct task_struct *tsk, unsigned long *sp,
-		       struct pt_regs *regs);
-
-extern const struct seq_operations cpuinfo_op;
-
-#endif