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is no longer maintained, now struggles to build modern kernels due to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, 78 deletions

diff --git a/arch/metag/include/asm/mmu.h b/arch/metag/include/asm/mmu.h
deleted file mode 100644
index cab5a01c3dcb..000000000000
--- a/arch/metag/include/asm/mmu.h
+++ /dev/null
@@ -1,78 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __MMU_H
-#define __MMU_H
-
-#ifdef CONFIG_METAG_USER_TCM
-#include <linux/list.h>
-#endif
-
-#ifdef CONFIG_HUGETLB_PAGE
-#include <asm/page.h>
-#endif
-
-typedef struct {
-	/* Software pgd base pointer used for Meta 1.x MMU. */
-	unsigned long pgd_base;
-#ifdef CONFIG_METAG_USER_TCM
-	struct list_head tcm;
-#endif
-#ifdef CONFIG_HUGETLB_PAGE
-#if HPAGE_SHIFT < HUGEPT_SHIFT
-	/* last partially filled huge page table address */
-	unsigned long part_huge;
-#endif
-#endif
-} mm_context_t;
-
-/* Given a virtual address, return the pte for the top level 4meg entry
- * that maps that address.
- * Returns 0 (an empty pte) if that range is not mapped.
- */
-unsigned long mmu_read_first_level_page(unsigned long vaddr);
-
-/* Given a linear (virtual) address, return the second level 4k pte
- * that maps that address.  Returns 0 if the address is not mapped.
- */
-unsigned long mmu_read_second_level_page(unsigned long vaddr);
-
-/* Get the virtual base address of the MMU */
-unsigned long mmu_get_base(void);
-
-/* Initialize the MMU. */
-void mmu_init(unsigned long mem_end);
-
-#ifdef CONFIG_METAG_META21_MMU
-/*
- * For cpu "cpu" calculate and return the address of the
- * MMCU_TnLOCAL_TABLE_PHYS0 if running in local-space or
- * MMCU_TnGLOBAL_TABLE_PHYS0 if running in global-space.
- */
-static inline unsigned long mmu_phys0_addr(unsigned int cpu)
-{
-	unsigned long phys0;
-
-	phys0 = (MMCU_T0LOCAL_TABLE_PHYS0 +
-		(MMCU_TnX_TABLE_PHYSX_STRIDE * cpu)) +
-		(MMCU_TXG_TABLE_PHYSX_OFFSET * is_global_space(PAGE_OFFSET));
-
-	return phys0;
-}
-
-/*
- * For cpu "cpu" calculate and return the address of the
- * MMCU_TnLOCAL_TABLE_PHYS1 if running in local-space or
- * MMCU_TnGLOBAL_TABLE_PHYS1 if running in global-space.
- */
-static inline unsigned long mmu_phys1_addr(unsigned int cpu)
-{
-	unsigned long phys1;
-
-	phys1 = (MMCU_T0LOCAL_TABLE_PHYS1 +
-		(MMCU_TnX_TABLE_PHYSX_STRIDE * cpu)) +
-		(MMCU_TXG_TABLE_PHYSX_OFFSET * is_global_space(PAGE_OFFSET));
-
-	return phys1;
-}
-#endif /* CONFIG_METAG_META21_MMU */
-
-#endif