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, 414 deletions

diff --git a/arch/mn10300/mm/fault.c b/arch/mn10300/mm/fault.c
deleted file mode 100644
index f0bfa1448744..000000000000
--- a/arch/mn10300/mm/fault.c
+++ /dev/null
@@ -1,414 +0,0 @@
-/* MN10300 MMU Fault handler
- *
- * Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd.
- * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
- * Modified by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
- */
-
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/ptrace.h>
-#include <linux/mman.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/interrupt.h>
-#include <linux/init.h>
-#include <linux/vt_kern.h>		/* For unblank_screen() */
-#include <linux/uaccess.h>
-
-#include <asm/pgalloc.h>
-#include <asm/hardirq.h>
-#include <asm/cpu-regs.h>
-#include <asm/debugger.h>
-#include <asm/gdb-stub.h>
-
-/*
- * Unlock any spinlocks which will prevent us from getting the
- * message out
- */
-void bust_spinlocks(int yes)
-{
-	if (yes) {
-		oops_in_progress = 1;
-	} else {
-		int loglevel_save = console_loglevel;
-#ifdef CONFIG_VT
-		unblank_screen();
-#endif
-		oops_in_progress = 0;
-		/*
-		 * OK, the message is on the console.  Now we call printk()
-		 * without oops_in_progress set so that printk will give klogd
-		 * a poke.  Hold onto your hats...
-		 */
-		console_loglevel = 15;	/* NMI oopser may have shut the console
-					 * up */
-		printk(" ");
-		console_loglevel = loglevel_save;
-	}
-}
-
-void do_BUG(const char *file, int line)
-{
-	bust_spinlocks(1);
-	printk(KERN_EMERG CUT_HERE);
-	printk(KERN_EMERG "kernel BUG at %s:%d!\n", file, line);
-}
-
-#if 0
-static void print_pagetable_entries(pgd_t *pgdir, unsigned long address)
-{
-	pgd_t *pgd;
-	pmd_t *pmd;
-	pte_t *pte;
-
-	pgd = pgdir + __pgd_offset(address);
-	printk(KERN_DEBUG "pgd entry %p: %016Lx\n",
-	       pgd, (long long) pgd_val(*pgd));
-
-	if (!pgd_present(*pgd)) {
-		printk(KERN_DEBUG "... pgd not present!\n");
-		return;
-	}
-	pmd = pmd_offset(pgd, address);
-	printk(KERN_DEBUG "pmd entry %p: %016Lx\n",
-	       pmd, (long long)pmd_val(*pmd));
-
-	if (!pmd_present(*pmd)) {
-		printk(KERN_DEBUG "... pmd not present!\n");
-		return;
-	}
-	pte = pte_offset(pmd, address);
-	printk(KERN_DEBUG "pte entry %p: %016Lx\n",
-	       pte, (long long) pte_val(*pte));
-
-	if (!pte_present(*pte))
-		printk(KERN_DEBUG "... pte not present!\n");
-}
-#endif
-
-/*
- * This routine handles page faults.  It determines the address,
- * and the problem, and then passes it off to one of the appropriate
- * routines.
- *
- * fault_code:
- * - LSW: either MMUFCR_IFC or MMUFCR_DFC as appropriate
- * - MSW: 0 if data access, 1 if instruction access
- * - bit 0: TLB miss flag
- * - bit 1: initial write
- * - bit 2: page invalid
- * - bit 3: protection violation
- * - bit 4: accessor (0=user 1=kernel)
- * - bit 5: 0=read 1=write
- * - bit 6-8: page protection spec
- * - bit 9: illegal address
- * - bit 16: 0=data 1=ins
- *
- */
-asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long fault_code,
-			      unsigned long address)
-{
-	struct vm_area_struct *vma;
-	struct task_struct *tsk;
-	struct mm_struct *mm;
-	unsigned long page;
-	siginfo_t info;
-	int fault;
-	unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
-
-#ifdef CONFIG_GDBSTUB
-	/* handle GDB stub causing a fault */
-	if (gdbstub_busy) {
-		gdbstub_exception(regs, TBR & TBR_INT_CODE);
-		return;
-	}
-#endif
-
-#if 0
-	printk(KERN_DEBUG "--- do_page_fault(%p,%s:%04lx,%08lx)\n",
-	       regs,
-	       fault_code & 0x10000 ? "ins" : "data",
-	       fault_code & 0xffff, address);
-#endif
-
-	tsk = current;
-
-	/*
-	 * We fault-in kernel-space virtual memory on-demand. The
-	 * 'reference' page table is init_mm.pgd.
-	 *
-	 * NOTE! We MUST NOT take any locks for this case. We may
-	 * be in an interrupt or a critical region, and should
-	 * only copy the information from the master page table,
-	 * nothing more.
-	 *
-	 * This verifies that the fault happens in kernel space
-	 * and that the fault was a page not present (invalid) error
-	 */
-	if (address >= VMALLOC_START && address < VMALLOC_END &&
-	    (fault_code & MMUFCR_xFC_ACCESS) == MMUFCR_xFC_ACCESS_SR &&
-	    (fault_code & MMUFCR_xFC_PGINVAL) == MMUFCR_xFC_PGINVAL
-	    )
-		goto vmalloc_fault;
-
-	mm = tsk->mm;
-	info.si_code = SEGV_MAPERR;
-
-	/*
-	 * If we're in an interrupt or have no user
-	 * context, we must not take the fault..
-	 */
-	if (faulthandler_disabled() || !mm)
-		goto no_context;
-
-	if ((fault_code & MMUFCR_xFC_ACCESS) == MMUFCR_xFC_ACCESS_USR)
-		flags |= FAULT_FLAG_USER;
-retry:
-	down_read(&mm->mmap_sem);
-
-	vma = find_vma(mm, address);
-	if (!vma)
-		goto bad_area;
-	if (vma->vm_start <= address)
-		goto good_area;
-	if (!(vma->vm_flags & VM_GROWSDOWN))
-		goto bad_area;
-
-	if ((fault_code & MMUFCR_xFC_ACCESS) == MMUFCR_xFC_ACCESS_USR) {
-		/* accessing the stack below the stack pointer is always a
-		 * bug */
-		if ((address & PAGE_MASK) + 2 * PAGE_SIZE < regs->sp) {
-#if 0
-			printk(KERN_WARNING
-			       "[%d] ### Access below stack @%lx (sp=%lx)\n",
-			       current->pid, address, regs->sp);
-			printk(KERN_WARNING
-			       "vma [%08x - %08x]\n",
-			       vma->vm_start, vma->vm_end);
-			show_registers(regs);
-			printk(KERN_WARNING
-			       "[%d] ### Code: [%08lx]"
-			       " %02x %02x %02x %02x %02x %02x %02x %02x\n",
-			       current->pid,
-			       regs->pc,
-			       ((u8 *) regs->pc)[0],
-			       ((u8 *) regs->pc)[1],
-			       ((u8 *) regs->pc)[2],
-			       ((u8 *) regs->pc)[3],
-			       ((u8 *) regs->pc)[4],
-			       ((u8 *) regs->pc)[5],
-			       ((u8 *) regs->pc)[6],
-			       ((u8 *) regs->pc)[7]
-			       );
-#endif
-			goto bad_area;
-		}
-	}
-
-	if (expand_stack(vma, address))
-		goto bad_area;
-
-/*
- * Ok, we have a good vm_area for this memory access, so
- * we can handle it..
- */
-good_area:
-	info.si_code = SEGV_ACCERR;
-	switch (fault_code & (MMUFCR_xFC_PGINVAL|MMUFCR_xFC_TYPE)) {
-	default:	/* 3: write, present */
-	case MMUFCR_xFC_TYPE_WRITE:
-#ifdef TEST_VERIFY_AREA
-		if ((fault_code & MMUFCR_xFC_ACCESS) == MMUFCR_xFC_ACCESS_SR)
-			printk(KERN_DEBUG "WP fault at %08lx\n", regs->pc);
-#endif
-		/* write to absent page */
-	case MMUFCR_xFC_PGINVAL | MMUFCR_xFC_TYPE_WRITE:
-		if (!(vma->vm_flags & VM_WRITE))
-			goto bad_area;
-		flags |= FAULT_FLAG_WRITE;
-		break;
-
-		/* read from protected page */
-	case MMUFCR_xFC_TYPE_READ:
-		goto bad_area;
-
-		/* read from absent page present */
-	case MMUFCR_xFC_PGINVAL | MMUFCR_xFC_TYPE_READ:
-		if (!(vma->vm_flags & (VM_READ | VM_EXEC)))
-			goto bad_area;
-		break;
-	}
-
-	/*
-	 * If for any reason at all we couldn't handle the fault,
-	 * make sure we exit gracefully rather than endlessly redo
-	 * the fault.
-	 */
-	fault = handle_mm_fault(vma, address, flags);
-
-	if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current))
-		return;
-
-	if (unlikely(fault & VM_FAULT_ERROR)) {
-		if (fault & VM_FAULT_OOM)
-			goto out_of_memory;
-		else if (fault & VM_FAULT_SIGSEGV)
-			goto bad_area;
-		else if (fault & VM_FAULT_SIGBUS)
-			goto do_sigbus;
-		BUG();
-	}
-	if (flags & FAULT_FLAG_ALLOW_RETRY) {
-		if (fault & VM_FAULT_MAJOR)
-			current->maj_flt++;
-		else
-			current->min_flt++;
-		if (fault & VM_FAULT_RETRY) {
-			flags &= ~FAULT_FLAG_ALLOW_RETRY;
-
-			 /* No need to up_read(&mm->mmap_sem) as we would
-			 * have already released it in __lock_page_or_retry
-			 * in mm/filemap.c.
-			 */
-
-			goto retry;
-		}
-	}
-
-	up_read(&mm->mmap_sem);
-	return;
-
-/*
- * Something tried to access memory that isn't in our memory map..
- * Fix it, but check if it's kernel or user first..
- */
-bad_area:
-	up_read(&mm->mmap_sem);
-
-	/* User mode accesses just cause a SIGSEGV */
-	if ((fault_code & MMUFCR_xFC_ACCESS) == MMUFCR_xFC_ACCESS_USR) {
-		info.si_signo = SIGSEGV;
-		info.si_errno = 0;
-		/* info.si_code has been set above */
-		info.si_addr = (void *)address;
-		force_sig_info(SIGSEGV, &info, tsk);
-		return;
-	}
-
-no_context:
-	/* Are we prepared to handle this kernel fault?  */
-	if (fixup_exception(regs))
-		return;
-
-/*
- * Oops. The kernel tried to access some bad page. We'll have to
- * terminate things with extreme prejudice.
- */
-
-	bust_spinlocks(1);
-
-	if (address < PAGE_SIZE)
-		printk(KERN_ALERT
-		       "Unable to handle kernel NULL pointer dereference");
-	else
-		printk(KERN_ALERT
-		       "Unable to handle kernel paging request");
-	printk(" at virtual address %08lx\n", address);
-	printk(" printing pc:\n");
-	printk(KERN_ALERT "%08lx\n", regs->pc);
-
-	debugger_intercept(fault_code & 0x00010000 ? EXCEP_IAERROR : EXCEP_DAERROR,
-			   SIGSEGV, SEGV_ACCERR, regs);
-
-	page = PTBR;
-	page = ((unsigned long *) __va(page))[address >> 22];
-	printk(KERN_ALERT "*pde = %08lx\n", page);
-	if (page & 1) {
-		page &= PAGE_MASK;
-		address &= 0x003ff000;
-		page = ((unsigned long *) __va(page))[address >> PAGE_SHIFT];
-		printk(KERN_ALERT "*pte = %08lx\n", page);
-	}
-
-	die("Oops", regs, fault_code);
-	do_exit(SIGKILL);
-
-/*
- * We ran out of memory, or some other thing happened to us that made
- * us unable to handle the page fault gracefully.
- */
-out_of_memory:
-	up_read(&mm->mmap_sem);
-	if ((fault_code & MMUFCR_xFC_ACCESS) == MMUFCR_xFC_ACCESS_USR) {
-		pagefault_out_of_memory();
-		return;
-	}
-	goto no_context;
-
-do_sigbus:
-	up_read(&mm->mmap_sem);
-
-	/*
-	 * Send a sigbus, regardless of whether we were in kernel
-	 * or user mode.
-	 */
-	info.si_signo = SIGBUS;
-	info.si_errno = 0;
-	info.si_code = BUS_ADRERR;
-	info.si_addr = (void *)address;
-	force_sig_info(SIGBUS, &info, tsk);
-
-	/* Kernel mode? Handle exceptions or die */
-	if ((fault_code & MMUFCR_xFC_ACCESS) == MMUFCR_xFC_ACCESS_SR)
-		goto no_context;
-	return;
-
-vmalloc_fault:
-	{
-		/*
-		 * Synchronize this task's top level page-table
-		 * with the 'reference' page table.
-		 *
-		 * Do _not_ use "tsk" here. We might be inside
-		 * an interrupt in the middle of a task switch..
-		 */
-		int index = pgd_index(address);
-		pgd_t *pgd, *pgd_k;
-		pud_t *pud, *pud_k;
-		pmd_t *pmd, *pmd_k;
-		pte_t *pte_k;
-
-		pgd_k = init_mm.pgd + index;
-
-		if (!pgd_present(*pgd_k))
-			goto no_context;
-
-		pud_k = pud_offset(pgd_k, address);
-		if (!pud_present(*pud_k))
-			goto no_context;
-
-		pmd_k = pmd_offset(pud_k, address);
-		if (!pmd_present(*pmd_k))
-			goto no_context;
-
-		pgd = (pgd_t *) PTBR + index;
-		pud = pud_offset(pgd, address);
-		pmd = pmd_offset(pud, address);
-		set_pmd(pmd, *pmd_k);
-
-		pte_k = pte_offset_kernel(pmd_k, address);
-		if (!pte_present(*pte_k))
-			goto no_context;
-		return;
-	}
-}