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is no longer maintained, now struggles to build modern kernels due to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, 118 deletions

diff --git a/arch/metag/kernel/core_reg.c b/arch/metag/kernel/core_reg.c
deleted file mode 100644
index df2833f2766f..000000000000
--- a/arch/metag/kernel/core_reg.c
+++ /dev/null
@@ -1,118 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- *  Support for reading and writing Meta core internal registers.
- *
- *  Copyright (C) 2011 Imagination Technologies Ltd.
- *
- */
-
-#include <linux/delay.h>
-#include <linux/export.h>
-
-#include <asm/core_reg.h>
-#include <asm/global_lock.h>
-#include <asm/hwthread.h>
-#include <asm/io.h>
-#include <asm/metag_mem.h>
-#include <asm/metag_regs.h>
-
-#define UNIT_BIT_MASK		TXUXXRXRQ_UXX_BITS
-#define REG_BIT_MASK		TXUXXRXRQ_RX_BITS
-#define THREAD_BIT_MASK		TXUXXRXRQ_TX_BITS
-
-#define UNIT_SHIFTS		TXUXXRXRQ_UXX_S
-#define REG_SHIFTS		TXUXXRXRQ_RX_S
-#define THREAD_SHIFTS		TXUXXRXRQ_TX_S
-
-#define UNIT_VAL(x)		(((x) << UNIT_SHIFTS) & UNIT_BIT_MASK)
-#define REG_VAL(x)		(((x) << REG_SHIFTS) & REG_BIT_MASK)
-#define THREAD_VAL(x)		(((x) << THREAD_SHIFTS) & THREAD_BIT_MASK)
-
-/*
- * core_reg_write() - modify the content of a register in a core unit.
- * @unit:	The unit to be modified.
- * @reg:	Register number within the unit.
- * @thread:	The thread we want to access.
- * @val:	The new value to write.
- *
- * Check asm/metag_regs.h for a list/defines of supported units (ie: TXUPC_ID,
- * TXUTR_ID, etc), and regnums within the units (ie: TXMASKI_REGNUM,
- * TXPOLLI_REGNUM, etc).
- */
-void core_reg_write(int unit, int reg, int thread, unsigned int val)
-{
-	unsigned long flags;
-
-	/* TXUCT_ID has its own memory mapped registers */
-	if (unit == TXUCT_ID) {
-		void __iomem *cu_reg = __CU_addr(thread, reg);
-		metag_out32(val, cu_reg);
-		return;
-	}
-
-	__global_lock2(flags);
-
-	/* wait for ready */
-	while (!(metag_in32(TXUXXRXRQ) & TXUXXRXRQ_DREADY_BIT))
-		udelay(10);
-
-	/* set the value to write */
-	metag_out32(val, TXUXXRXDT);
-
-	/* set the register to write */
-	val = UNIT_VAL(unit) | REG_VAL(reg) | THREAD_VAL(thread);
-	metag_out32(val, TXUXXRXRQ);
-
-	/* wait for finish */
-	while (!(metag_in32(TXUXXRXRQ) & TXUXXRXRQ_DREADY_BIT))
-		udelay(10);
-
-	__global_unlock2(flags);
-}
-EXPORT_SYMBOL(core_reg_write);
-
-/*
- * core_reg_read() - read the content of a register in a core unit.
- * @unit:	The unit to be modified.
- * @reg:	Register number within the unit.
- * @thread:	The thread we want to access.
- *
- * Check asm/metag_regs.h for a list/defines of supported units (ie: TXUPC_ID,
- * TXUTR_ID, etc), and regnums within the units (ie: TXMASKI_REGNUM,
- * TXPOLLI_REGNUM, etc).
- */
-unsigned int core_reg_read(int unit, int reg, int thread)
-{
-	unsigned long flags;
-	unsigned int val;
-
-	/* TXUCT_ID has its own memory mapped registers */
-	if (unit == TXUCT_ID) {
-		void __iomem *cu_reg = __CU_addr(thread, reg);
-		val = metag_in32(cu_reg);
-		return val;
-	}
-
-	__global_lock2(flags);
-
-	/* wait for ready */
-	while (!(metag_in32(TXUXXRXRQ) & TXUXXRXRQ_DREADY_BIT))
-		udelay(10);
-
-	/* set the register to read */
-	val = (UNIT_VAL(unit) | REG_VAL(reg) | THREAD_VAL(thread) |
-							TXUXXRXRQ_RDnWR_BIT);
-	metag_out32(val, TXUXXRXRQ);
-
-	/* wait for finish */
-	while (!(metag_in32(TXUXXRXRQ) & TXUXXRXRQ_DREADY_BIT))
-		udelay(10);
-
-	/* read the register value */
-	val = metag_in32(TXUXXRXDT);
-
-	__global_unlock2(flags);
-
-	return val;
-}
-EXPORT_SYMBOL(core_reg_read);