mn10300: Remove the architecture

Remove the MN10300 arch as the hardware is defunct.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Masahiro Yamada <yamada.masahiro@socionext.com>
cc: linux-am33-list@redhat.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 213 deletions

diff --git a/arch/mn10300/mm/tlb-smp.c b/arch/mn10300/mm/tlb-smp.c
deleted file mode 100644
index 085f2bb691ac..000000000000
--- a/arch/mn10300/mm/tlb-smp.c
+++ /dev/null
@@ -1,213 +0,0 @@
-/* SMP TLB support routines.
- *
- * Copyright (C) 2006-2008 Panasonic Corporation
- * All Rights Reserved.
- *
- * 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.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-#include <linux/interrupt.h>
-#include <linux/spinlock.h>
-#include <linux/init.h>
-#include <linux/jiffies.h>
-#include <linux/cpumask.h>
-#include <linux/err.h>
-#include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/sched/mm.h>
-#include <linux/profile.h>
-#include <linux/smp.h>
-#include <asm/tlbflush.h>
-#include <asm/bitops.h>
-#include <asm/processor.h>
-#include <asm/bug.h>
-#include <asm/exceptions.h>
-#include <asm/hardirq.h>
-#include <asm/fpu.h>
-#include <asm/mmu_context.h>
-#include <asm/thread_info.h>
-#include <asm/cpu-regs.h>
-#include <asm/intctl-regs.h>
-
-/*
- * For flush TLB
- */
-#define FLUSH_ALL	0xffffffff
-
-static cpumask_t flush_cpumask;
-static struct mm_struct *flush_mm;
-static unsigned long flush_va;
-static DEFINE_SPINLOCK(tlbstate_lock);
-
-DEFINE_PER_CPU_SHARED_ALIGNED(struct tlb_state, cpu_tlbstate) = {
-	&init_mm, 0
-};
-
-static void flush_tlb_others(cpumask_t cpumask, struct mm_struct *mm,
-			     unsigned long va);
-static void do_flush_tlb_all(void *info);
-
-/**
- * smp_flush_tlb - Callback to invalidate the TLB.
- * @unused: Callback context (ignored).
- */
-void smp_flush_tlb(void *unused)
-{
-	unsigned long cpu_id;
-
-	cpu_id = get_cpu();
-
-	if (!cpumask_test_cpu(cpu_id, &flush_cpumask))
-		/* This was a BUG() but until someone can quote me the line
-		 * from the intel manual that guarantees an IPI to multiple
-		 * CPUs is retried _only_ on the erroring CPUs its staying as a
-		 * return
-		 *
-		 * BUG();
-		 */
-		goto out;
-
-	if (flush_va == FLUSH_ALL)
-		local_flush_tlb();
-	else
-		local_flush_tlb_page(flush_mm, flush_va);
-
-	smp_mb__before_atomic();
-	cpumask_clear_cpu(cpu_id, &flush_cpumask);
-	smp_mb__after_atomic();
-out:
-	put_cpu();
-}
-
-/**
- * flush_tlb_others - Tell the specified CPUs to invalidate their TLBs
- * @cpumask: The list of CPUs to target.
- * @mm: The VM context to flush from (if va!=FLUSH_ALL).
- * @va: Virtual address to flush or FLUSH_ALL to flush everything.
- */
-static void flush_tlb_others(cpumask_t cpumask, struct mm_struct *mm,
-			     unsigned long va)
-{
-	cpumask_t tmp;
-
-	/* A couple of sanity checks (to be removed):
-	 * - mask must not be empty
-	 * - current CPU must not be in mask
-	 * - we do not send IPIs to as-yet unbooted CPUs.
-	 */
-	BUG_ON(!mm);
-	BUG_ON(cpumask_empty(&cpumask));
-	BUG_ON(cpumask_test_cpu(smp_processor_id(), &cpumask));
-
-	cpumask_and(&tmp, &cpumask, cpu_online_mask);
-	BUG_ON(!cpumask_equal(&cpumask, &tmp));
-
-	/* I'm not happy about this global shared spinlock in the MM hot path,
-	 * but we'll see how contended it is.
-	 *
-	 * Temporarily this turns IRQs off, so that lockups are detected by the
-	 * NMI watchdog.
-	 */
-	spin_lock(&tlbstate_lock);
-
-	flush_mm = mm;
-	flush_va = va;
-#if NR_CPUS <= BITS_PER_LONG
-	atomic_or(cpumask.bits[0], (atomic_t *)&flush_cpumask.bits[0]);
-#else
-#error Not supported.
-#endif
-
-	/* FIXME: if NR_CPUS>=3, change send_IPI_mask */
-	smp_call_function(smp_flush_tlb, NULL, 1);
-
-	while (!cpumask_empty(&flush_cpumask))
-		/* Lockup detection does not belong here */
-		smp_mb();
-
-	flush_mm = NULL;
-	flush_va = 0;
-	spin_unlock(&tlbstate_lock);
-}
-
-/**
- * flush_tlb_mm - Invalidate TLB of specified VM context
- * @mm: The VM context to invalidate.
- */
-void flush_tlb_mm(struct mm_struct *mm)
-{
-	cpumask_t cpu_mask;
-
-	preempt_disable();
-	cpumask_copy(&cpu_mask, mm_cpumask(mm));
-	cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
-
-	local_flush_tlb();
-	if (!cpumask_empty(&cpu_mask))
-		flush_tlb_others(cpu_mask, mm, FLUSH_ALL);
-
-	preempt_enable();
-}
-
-/**
- * flush_tlb_current_task - Invalidate TLB of current task
- */
-void flush_tlb_current_task(void)
-{
-	struct mm_struct *mm = current->mm;
-	cpumask_t cpu_mask;
-
-	preempt_disable();
-	cpumask_copy(&cpu_mask, mm_cpumask(mm));
-	cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
-
-	local_flush_tlb();
-	if (!cpumask_empty(&cpu_mask))
-		flush_tlb_others(cpu_mask, mm, FLUSH_ALL);
-
-	preempt_enable();
-}
-
-/**
- * flush_tlb_page - Invalidate TLB of page
- * @vma: The VM context to invalidate the page for.
- * @va: The virtual address of the page to invalidate.
- */
-void flush_tlb_page(struct vm_area_struct *vma, unsigned long va)
-{
-	struct mm_struct *mm = vma->vm_mm;
-	cpumask_t cpu_mask;
-
-	preempt_disable();
-	cpumask_copy(&cpu_mask, mm_cpumask(mm));
-	cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
-
-	local_flush_tlb_page(mm, va);
-	if (!cpumask_empty(&cpu_mask))
-		flush_tlb_others(cpu_mask, mm, va);
-
-	preempt_enable();
-}
-
-/**
- * do_flush_tlb_all - Callback to completely invalidate a TLB
- * @unused: Callback context (ignored).
- */
-static void do_flush_tlb_all(void *unused)
-{
-	local_flush_tlb_all();
-}
-
-/**
- * flush_tlb_all - Completely invalidate TLBs on all CPUs
- */
-void flush_tlb_all(void)
-{
-	on_each_cpu(do_flush_tlb_all, 0, 1);
-}