powerpc: Remove arch/ppc and include/asm-ppc

All the maintained platforms are now in arch/powerpc, so the old
arch/ppc stuff can now go away.

Acked-by: Adrian Bunk <bunk@kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Becky Bruce <becky.bruce@freescale.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Jochen Friedrich <jochen@scram.de>
Acked-by: John Linn <john.linn@xilinx.com>
Acked-by: Jon Loeliger <jdl@freescale.com>
Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Acked-by: Scott Wood <scottwood@freescale.com>
Acked-by: Sean MacLennan <smaclennan@pikatech.com>
Acked-by: Segher Boessenkool <segher@kernel.crashing.org>
Acked-by: Stefan Roese <sr@denx.de>
Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
Acked-by: Wolfgang Denk <wd@denx.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 0 insertions, 436 deletions

diff --git a/arch/ppc/mm/fault.c b/arch/ppc/mm/fault.c
deleted file mode 100644
index 36c0e7529edb..000000000000
--- a/arch/ppc/mm/fault.c
+++ /dev/null
@@ -1,436 +0,0 @@
-/*
- *  PowerPC version
- *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
- *
- *  Derived from "arch/i386/mm/fault.c"
- *    Copyright (C) 1991, 1992, 1993, 1994  Linus Torvalds
- *
- *  Modified by Cort Dougan and Paul Mackerras.
- *
- *  This program is free software; you can redistribute it and/or
- *  modify it under the terms of the GNU General Public License
- *  as published by the Free Software Foundation; either version
- *  2 of the License, 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/interrupt.h>
-#include <linux/highmem.h>
-#include <linux/module.h>
-
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/mmu.h>
-#include <asm/mmu_context.h>
-#include <asm/system.h>
-#include <asm/uaccess.h>
-#include <asm/tlbflush.h>
-
-#if defined(CONFIG_XMON) || defined(CONFIG_KGDB)
-extern void (*debugger)(struct pt_regs *);
-extern void (*debugger_fault_handler)(struct pt_regs *);
-extern int (*debugger_dabr_match)(struct pt_regs *);
-int debugger_kernel_faults = 1;
-#endif
-
-unsigned long htab_reloads;	/* updated by hashtable.S:hash_page() */
-unsigned long htab_evicts; 	/* updated by hashtable.S:hash_page() */
-unsigned long htab_preloads;	/* updated by hashtable.S:add_hash_page() */
-unsigned long pte_misses;	/* updated by do_page_fault() */
-unsigned long pte_errors;	/* updated by do_page_fault() */
-unsigned int probingmem;
-
-/*
- * Check whether the instruction at regs->nip is a store using
- * an update addressing form which will update r1.
- */
-static int store_updates_sp(struct pt_regs *regs)
-{
-	unsigned int inst;
-
-	if (get_user(inst, (unsigned int __user *)regs->nip))
-		return 0;
-	/* check for 1 in the rA field */
-	if (((inst >> 16) & 0x1f) != 1)
-		return 0;
-	/* check major opcode */
-	switch (inst >> 26) {
-	case 37:	/* stwu */
-	case 39:	/* stbu */
-	case 45:	/* sthu */
-	case 53:	/* stfsu */
-	case 55:	/* stfdu */
-		return 1;
-	case 31:
-		/* check minor opcode */
-		switch ((inst >> 1) & 0x3ff) {
-		case 183:	/* stwux */
-		case 247:	/* stbux */
-		case 439:	/* sthux */
-		case 695:	/* stfsux */
-		case 759:	/* stfdux */
-			return 1;
-		}
-	}
-	return 0;
-}
-
-/*
- * For 600- and 800-family processors, the error_code parameter is DSISR
- * for a data fault, SRR1 for an instruction fault. For 400-family processors
- * the error_code parameter is ESR for a data fault, 0 for an instruction
- * fault.
- */
-int do_page_fault(struct pt_regs *regs, unsigned long address,
-		  unsigned long error_code)
-{
-	struct vm_area_struct * vma;
-	struct mm_struct *mm = current->mm;
-	siginfo_t info;
-	int code = SEGV_MAPERR;
-	int fault;
-#if defined(CONFIG_4xx) || defined (CONFIG_BOOKE)
-	int is_write = error_code & ESR_DST;
-#else
-	int is_write = 0;
-
-	/*
-	 * Fortunately the bit assignments in SRR1 for an instruction
-	 * fault and DSISR for a data fault are mostly the same for the
-	 * bits we are interested in.  But there are some bits which
-	 * indicate errors in DSISR but can validly be set in SRR1.
-	 */
-	if (TRAP(regs) == 0x400)
-		error_code &= 0x48200000;
-	else
-		is_write = error_code & 0x02000000;
-#endif /* CONFIG_4xx || CONFIG_BOOKE */
-
-#if defined(CONFIG_XMON) || defined(CONFIG_KGDB)
-	if (debugger_fault_handler && TRAP(regs) == 0x300) {
-		debugger_fault_handler(regs);
-		return 0;
-	}
-#if !(defined(CONFIG_4xx) || defined(CONFIG_BOOKE))
-	if (error_code & 0x00400000) {
-		/* DABR match */
-		if (debugger_dabr_match(regs))
-			return 0;
-	}
-#endif /* !(CONFIG_4xx || CONFIG_BOOKE)*/
-#endif /* CONFIG_XMON || CONFIG_KGDB */
-
-	if (in_atomic() || mm == NULL)
-		return SIGSEGV;
-
-	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 (!is_write)
-                goto bad_area;
-
-	/*
-	 * N.B. The rs6000/xcoff ABI allows programs to access up to
-	 * a few hundred bytes below the stack pointer.
-	 * The kernel signal delivery code writes up to about 1.5kB
-	 * below the stack pointer (r1) before decrementing it.
-	 * The exec code can write slightly over 640kB to the stack
-	 * before setting the user r1.  Thus we allow the stack to
-	 * expand to 1MB without further checks.
-	 */
-	if (address + 0x100000 < vma->vm_end) {
-		/* get user regs even if this fault is in kernel mode */
-		struct pt_regs *uregs = current->thread.regs;
-		if (uregs == NULL)
-			goto bad_area;
-
-		/*
-		 * A user-mode access to an address a long way below
-		 * the stack pointer is only valid if the instruction
-		 * is one which would update the stack pointer to the
-		 * address accessed if the instruction completed,
-		 * i.e. either stwu rs,n(r1) or stwux rs,r1,rb
-		 * (or the byte, halfword, float or double forms).
-		 *
-		 * If we don't check this then any write to the area
-		 * between the last mapped region and the stack will
-		 * expand the stack rather than segfaulting.
-		 */
-		if (address + 2048 < uregs->gpr[1]
-		    && (!user_mode(regs) || !store_updates_sp(regs)))
-			goto bad_area;
-	}
-	if (expand_stack(vma, address))
-		goto bad_area;
-
-good_area:
-	code = SEGV_ACCERR;
-#if defined(CONFIG_6xx)
-	if (error_code & 0x95700000)
-		/* an error such as lwarx to I/O controller space,
-		   address matching DABR, eciwx, etc. */
-		goto bad_area;
-#endif /* CONFIG_6xx */
-#if defined(CONFIG_8xx)
-        /* The MPC8xx seems to always set 0x80000000, which is
-         * "undefined".  Of those that can be set, this is the only
-         * one which seems bad.
-         */
-	if (error_code & 0x10000000)
-                /* Guarded storage error. */
-		goto bad_area;
-#endif /* CONFIG_8xx */
-
-	/* a write */
-	if (is_write) {
-		if (!(vma->vm_flags & VM_WRITE))
-			goto bad_area;
-#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
-	/* an exec  - 4xx/Book-E allows for per-page execute permission */
-	} else if (TRAP(regs) == 0x400) {
-		pte_t *ptep;
-		pmd_t *pmdp;
-
-#if 0
-		/* It would be nice to actually enforce the VM execute
-		   permission on CPUs which can do so, but far too
-		   much stuff in userspace doesn't get the permissions
-		   right, so we let any page be executed for now. */
-		if (! (vma->vm_flags & VM_EXEC))
-			goto bad_area;
-#endif
-
-		/* Since 4xx/Book-E supports per-page execute permission,
-		 * we lazily flush dcache to icache. */
-		ptep = NULL;
-		if (get_pteptr(mm, address, &ptep, &pmdp)) {
-			spinlock_t *ptl = pte_lockptr(mm, pmdp);
-			spin_lock(ptl);
-			if (pte_present(*ptep)) {
-				struct page *page = pte_page(*ptep);
-
-				if (!test_bit(PG_arch_1, &page->flags)) {
-					flush_dcache_icache_page(page);
-					set_bit(PG_arch_1, &page->flags);
-				}
-				pte_update(ptep, 0, _PAGE_HWEXEC);
-				_tlbie(address, mm->context.id);
-				pte_unmap_unlock(ptep, ptl);
-				up_read(&mm->mmap_sem);
-				return 0;
-			}
-			pte_unmap_unlock(ptep, ptl);
-		}
-#endif
-	/* a read */
-	} else {
-		/* protection fault */
-		if (error_code & 0x08000000)
-			goto bad_area;
-		if (!(vma->vm_flags & (VM_READ | VM_EXEC | VM_WRITE)))
-			goto bad_area;
-	}
-
-	/*
-	 * If for any reason at all we couldn't handle the fault,
-	 * make sure we exit gracefully rather than endlessly redo
-	 * the fault.
-	 */
- survive:
-	fault = handle_mm_fault(mm, vma, address, is_write);
-	if (unlikely(fault & VM_FAULT_ERROR)) {
-		if (fault & VM_FAULT_OOM)
-			goto out_of_memory;
-		else if (fault & VM_FAULT_SIGBUS)
-			goto do_sigbus;
-		BUG();
-	}
-	if (fault & VM_FAULT_MAJOR)
-		current->maj_flt++;
-	else
-		current->min_flt++;
-
-	up_read(&mm->mmap_sem);
-	/*
-	 * keep track of tlb+htab misses that are good addrs but
-	 * just need pte's created via handle_mm_fault()
-	 * -- Cort
-	 */
-	pte_misses++;
-	return 0;
-
-bad_area:
-	up_read(&mm->mmap_sem);
-	pte_errors++;
-
-	/* User mode accesses cause a SIGSEGV */
-	if (user_mode(regs)) {
-		_exception(SIGSEGV, regs, code, address);
-		return 0;
-	}
-
-	return SIGSEGV;
-
-/*
- * 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 (is_global_init(current)) {
-		yield();
-		down_read(&mm->mmap_sem);
-		goto survive;
-	}
-	printk("VM: killing process %s\n", current->comm);
-	if (user_mode(regs))
-		do_group_exit(SIGKILL);
-	return SIGKILL;
-
-do_sigbus:
-	up_read(&mm->mmap_sem);
-	info.si_signo = SIGBUS;
-	info.si_errno = 0;
-	info.si_code = BUS_ADRERR;
-	info.si_addr = (void __user *)address;
-	force_sig_info (SIGBUS, &info, current);
-	if (!user_mode(regs))
-		return SIGBUS;
-	return 0;
-}
-
-/*
- * bad_page_fault is called when we have a bad access from the kernel.
- * It is called from the DSI and ISI handlers in head.S and from some
- * of the procedures in traps.c.
- */
-void
-bad_page_fault(struct pt_regs *regs, unsigned long address, int sig)
-{
-	const struct exception_table_entry *entry;
-
-	/* Are we prepared to handle this fault?  */
-	if ((entry = search_exception_tables(regs->nip)) != NULL) {
-		regs->nip = entry->fixup;
-		return;
-	}
-
-	/* kernel has accessed a bad area */
-#if defined(CONFIG_XMON) || defined(CONFIG_KGDB)
-	if (debugger_kernel_faults)
-		debugger(regs);
-#endif
-	die("kernel access of bad area", regs, sig);
-}
-
-#ifdef CONFIG_8xx
-
-/* The pgtable.h claims some functions generically exist, but I
- * can't find them......
- */
-pte_t *va_to_pte(unsigned long address)
-{
-	pgd_t *dir;
-	pmd_t *pmd;
-	pte_t *pte;
-
-	if (address < TASK_SIZE)
-		return NULL;
-
-	dir = pgd_offset(&init_mm, address);
-	if (dir) {
-		pmd = pmd_offset(dir, address & PAGE_MASK);
-		if (pmd && pmd_present(*pmd)) {
-			pte = pte_offset_kernel(pmd, address & PAGE_MASK);
-			if (pte && pte_present(*pte))
-				return(pte);
-		}
-	}
-	return NULL;
-}
-
-unsigned long va_to_phys(unsigned long address)
-{
-	pte_t *pte;
-
-	pte = va_to_pte(address);
-	if (pte)
-		return(((unsigned long)(pte_val(*pte)) & PAGE_MASK) | (address & ~(PAGE_MASK)));
-	return (0);
-}
-
-void
-print_8xx_pte(struct mm_struct *mm, unsigned long addr)
-{
-        pgd_t * pgd;
-        pmd_t * pmd;
-        pte_t * pte;
-
-        printk(" pte @ 0x%8lx: ", addr);
-        pgd = pgd_offset(mm, addr & PAGE_MASK);
-        if (pgd) {
-                pmd = pmd_offset(pgd, addr & PAGE_MASK);
-                if (pmd && pmd_present(*pmd)) {
-                        pte = pte_offset_kernel(pmd, addr & PAGE_MASK);
-                        if (pte) {
-                                printk(" (0x%08lx)->(0x%08lx)->0x%08lx\n",
-                                        (long)pgd, (long)pte, (long)pte_val(*pte));
-#define pp ((long)pte_val(*pte))			
-				printk(" RPN: %05lx PP: %lx SPS: %lx SH: %lx "
-				       "CI: %lx v: %lx\n",
-				       pp>>12,    /* rpn */
-				       (pp>>10)&3, /* pp */
-				       (pp>>3)&1, /* small */
-				       (pp>>2)&1, /* shared */
-				       (pp>>1)&1, /* cache inhibit */
-				       pp&1       /* valid */
-				       );
-#undef pp			
-                        }
-                        else {
-                                printk("no pte\n");
-                        }
-                }
-                else {
-                        printk("no pmd\n");
-                }
-        }
-        else {
-                printk("no pgd\n");
-        }
-}
-
-int
-get_8xx_pte(struct mm_struct *mm, unsigned long addr)
-{
-        pgd_t * pgd;
-        pmd_t * pmd;
-        pte_t * pte;
-        int     retval = 0;
-
-        pgd = pgd_offset(mm, addr & PAGE_MASK);
-        if (pgd) {
-                pmd = pmd_offset(pgd, addr & PAGE_MASK);
-                if (pmd && pmd_present(*pmd)) {
-                        pte = pte_offset_kernel(pmd, addr & PAGE_MASK);
-                        if (pte) {
-				retval = (int)pte_val(*pte);
-                        }
-                }
-        }
-        return(retval);
-}
-#endif /* CONFIG_8xx */