powerpc: Rename files to have consistent _32/_64 suffixes

This doesn't change any code, just renames things so we consistently
have foo_32.c and foo_64.c where we have separate 32- and 64-bit
versions.

Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 357 insertions, 0 deletions

diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c
new file mode 100644
index 000000000000..724f97e5dee5
--- /dev/null
+++ b/arch/powerpc/mm/pgtable_64.c
@@ -0,0 +1,357 @@
+/*
+ *  This file contains ioremap and related functions for 64-bit machines.
+ *
+ *  Derived from arch/ppc64/mm/init.c
+ *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
+ *
+ *  Modifications by Paul Mackerras (PowerMac) (paulus@samba.org)
+ *  and Cort Dougan (PReP) (cort@cs.nmt.edu)
+ *    Copyright (C) 1996 Paul Mackerras
+ *  Amiga/APUS changes by Jesper Skov (jskov@cygnus.co.uk).
+ *
+ *  Derived from "arch/i386/mm/init.c"
+ *    Copyright (C) 1991, 1992, 1993, 1994  Linus Torvalds
+ *
+ *  Dave Engebretsen <engebret@us.ibm.com>
+ *      Rework for PPC64 port.
+ *
+ *  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/config.h>
+#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/mman.h>
+#include <linux/mm.h>
+#include <linux/swap.h>
+#include <linux/stddef.h>
+#include <linux/vmalloc.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/bootmem.h>
+#include <linux/highmem.h>
+#include <linux/idr.h>
+#include <linux/nodemask.h>
+#include <linux/module.h>
+
+#include <asm/pgalloc.h>
+#include <asm/page.h>
+#include <asm/prom.h>
+#include <asm/lmb.h>
+#include <asm/rtas.h>
+#include <asm/io.h>
+#include <asm/mmu_context.h>
+#include <asm/pgtable.h>
+#include <asm/mmu.h>
+#include <asm/uaccess.h>
+#include <asm/smp.h>
+#include <asm/machdep.h>
+#include <asm/tlb.h>
+#include <asm/eeh.h>
+#include <asm/processor.h>
+#include <asm/mmzone.h>
+#include <asm/cputable.h>
+#include <asm/ppcdebug.h>
+#include <asm/sections.h>
+#include <asm/system.h>
+#include <asm/iommu.h>
+#include <asm/abs_addr.h>
+#include <asm/vdso.h>
+#include <asm/imalloc.h>
+
+#if PGTABLE_RANGE > USER_VSID_RANGE
+#warning Limited user VSID range means pagetable space is wasted
+#endif
+
+#if (TASK_SIZE_USER64 < PGTABLE_RANGE) && (TASK_SIZE_USER64 < USER_VSID_RANGE)
+#warning TASK_SIZE is smaller than it needs to be.
+#endif
+
+int mem_init_done;
+unsigned long ioremap_bot = IMALLOC_BASE;
+static unsigned long phbs_io_bot = PHBS_IO_BASE;
+
+extern pgd_t swapper_pg_dir[];
+extern struct task_struct *current_set[NR_CPUS];
+
+unsigned long klimit = (unsigned long)_end;
+
+/* max amount of RAM to use */
+unsigned long __max_memory;
+
+/* info on what we think the IO hole is */
+unsigned long   io_hole_start;
+unsigned long   io_hole_size;
+
+#ifdef CONFIG_PPC_ISERIES
+
+void __iomem *ioremap(unsigned long addr, unsigned long size)
+{
+        return (void __iomem *)addr;
+}
+
+extern void __iomem *__ioremap(unsigned long addr, unsigned long size,
+                       unsigned long flags)
+{
+        return (void __iomem *)addr;
+}
+
+void iounmap(volatile void __iomem *addr)
+{
+        return;
+}
+
+#else
+
+/*
+ * map_io_page currently only called by __ioremap
+ * map_io_page adds an entry to the ioremap page table
+ * and adds an entry to the HPT, possibly bolting it
+ */
+static int map_io_page(unsigned long ea, unsigned long pa, int flags)
+{
+        pgd_t *pgdp;
+        pud_t *pudp;
+        pmd_t *pmdp;
+        pte_t *ptep;
+        unsigned long vsid;
+
+        if (mem_init_done) {
+                spin_lock(&init_mm.page_table_lock);
+                pgdp = pgd_offset_k(ea);
+                pudp = pud_alloc(&init_mm, pgdp, ea);
+                if (!pudp)
+                        return -ENOMEM;
+                pmdp = pmd_alloc(&init_mm, pudp, ea);
+                if (!pmdp)
+                        return -ENOMEM;
+                ptep = pte_alloc_kernel(&init_mm, pmdp, ea);
+                if (!ptep)
+                        return -ENOMEM;
+                set_pte_at(&init_mm, ea, ptep, pfn_pte(pa >> PAGE_SHIFT,
+                                                          __pgprot(flags)));
+                spin_unlock(&init_mm.page_table_lock);
+        } else {
+                unsigned long va, vpn, hash, hpteg;
+
+                /*
+                 * If the mm subsystem is not fully up, we cannot create a
+                 * linux page table entry for this mapping.  Simply bolt an
+                 * entry in the hardware page table.
+                 */
+                vsid = get_kernel_vsid(ea);
+                va = (vsid << 28) | (ea & 0xFFFFFFF);
+                vpn = va >> PAGE_SHIFT;
+
+                hash = hpt_hash(vpn, 0);
+
+                hpteg = ((hash & htab_hash_mask) * HPTES_PER_GROUP);
+
+                /* Panic if a pte grpup is full */
+                if (ppc_md.hpte_insert(hpteg, va, pa >> PAGE_SHIFT,
+                                       HPTE_V_BOLTED,
+                                       _PAGE_NO_CACHE|_PAGE_GUARDED|PP_RWXX)
+                    == -1) {
+                        panic("map_io_page: could not insert mapping");
+                }
+        }
+        return 0;
+}
+
+
+static void __iomem * __ioremap_com(unsigned long addr, unsigned long pa,
+                            unsigned long ea, unsigned long size,
+                            unsigned long flags)
+{
+        unsigned long i;
+
+        if ((flags & _PAGE_PRESENT) == 0)
+                flags |= pgprot_val(PAGE_KERNEL);
+
+        for (i = 0; i < size; i += PAGE_SIZE)
+                if (map_io_page(ea+i, pa+i, flags))
+                        return NULL;
+
+        return (void __iomem *) (ea + (addr & ~PAGE_MASK));
+}
+
+
+void __iomem *
+ioremap(unsigned long addr, unsigned long size)
+{
+        return __ioremap(addr, size, _PAGE_NO_CACHE | _PAGE_GUARDED);
+}
+
+void __iomem * __ioremap(unsigned long addr, unsigned long size,
+                         unsigned long flags)
+{
+        unsigned long pa, ea;
+        void __iomem *ret;
+
+        /*
+         * Choose an address to map it to.
+         * Once the imalloc system is running, we use it.
+         * Before that, we map using addresses going
+         * up from ioremap_bot.  imalloc will use
+         * the addresses from ioremap_bot through
+         * IMALLOC_END
+         * 
+         */
+        pa = addr & PAGE_MASK;
+        size = PAGE_ALIGN(addr + size) - pa;
+
+        if (size == 0)
+                return NULL;
+
+        if (mem_init_done) {
+                struct vm_struct *area;
+                area = im_get_free_area(size);
+                if (area == NULL)
+                        return NULL;
+                ea = (unsigned long)(area->addr);
+                ret = __ioremap_com(addr, pa, ea, size, flags);
+                if (!ret)
+                        im_free(area->addr);
+        } else {
+                ea = ioremap_bot;
+                ret = __ioremap_com(addr, pa, ea, size, flags);
+                if (ret)
+                        ioremap_bot += size;
+        }
+        return ret;
+}
+
+#define IS_PAGE_ALIGNED(_val) ((_val) == ((_val) & PAGE_MASK))
+
+int __ioremap_explicit(unsigned long pa, unsigned long ea,
+                       unsigned long size, unsigned long flags)
+{
+        struct vm_struct *area;
+        void __iomem *ret;
+        
+        /* For now, require page-aligned values for pa, ea, and size */
+        if (!IS_PAGE_ALIGNED(pa) || !IS_PAGE_ALIGNED(ea) ||
+            !IS_PAGE_ALIGNED(size)) {
+                printk(KERN_ERR "unaligned value in %s\n", __FUNCTION__);
+                return 1;
+        }
+        
+        if (!mem_init_done) {
+                /* Two things to consider in this case:
+                 * 1) No records will be kept (imalloc, etc) that the region
+                 *    has been remapped
+                 * 2) It won't be easy to iounmap() the region later (because
+                 *    of 1)
+                 */
+                ;
+        } else {
+                area = im_get_area(ea, size,
+                        IM_REGION_UNUSED|IM_REGION_SUBSET|IM_REGION_EXISTS);
+                if (area == NULL) {
+                        /* Expected when PHB-dlpar is in play */
+                        return 1;
+                }
+                if (ea != (unsigned long) area->addr) {
+                        printk(KERN_ERR "unexpected addr return from "
+                               "im_get_area\n");
+                        return 1;
+                }
+        }
+        
+        ret = __ioremap_com(pa, pa, ea, size, flags);
+        if (ret == NULL) {
+                printk(KERN_ERR "ioremap_explicit() allocation failure !\n");
+                return 1;
+        }
+        if (ret != (void *) ea) {
+                printk(KERN_ERR "__ioremap_com() returned unexpected addr\n");
+                return 1;
+        }
+
+        return 0;
+}
+
+/*  
+ * Unmap an IO region and remove it from imalloc'd list.
+ * Access to IO memory should be serialized by driver.
+ * This code is modeled after vmalloc code - unmap_vm_area()
+ *
+ * XXX  what about calls before mem_init_done (ie python_countermeasures())
+ */
+void iounmap(volatile void __iomem *token)
+{
+        void *addr;
+
+        if (!mem_init_done)
+                return;
+        
+        addr = (void *) ((unsigned long __force) token & PAGE_MASK);
+
+        im_free(addr);
+}
+
+static int iounmap_subset_regions(unsigned long addr, unsigned long size)
+{
+        struct vm_struct *area;
+
+        /* Check whether subsets of this region exist */
+        area = im_get_area(addr, size, IM_REGION_SUPERSET);
+        if (area == NULL)
+                return 1;
+
+        while (area) {
+                iounmap((void __iomem *) area->addr);
+                area = im_get_area(addr, size,
+                                IM_REGION_SUPERSET);
+        }
+
+        return 0;
+}
+
+int iounmap_explicit(volatile void __iomem *start, unsigned long size)
+{
+        struct vm_struct *area;
+        unsigned long addr;
+        int rc;
+        
+        addr = (unsigned long __force) start & PAGE_MASK;
+
+        /* Verify that the region either exists or is a subset of an existing
+         * region.  In the latter case, split the parent region to create 
+         * the exact region 
+         */
+        area = im_get_area(addr, size, 
+                            IM_REGION_EXISTS | IM_REGION_SUBSET);
+        if (area == NULL) {
+                /* Determine whether subset regions exist.  If so, unmap */
+                rc = iounmap_subset_regions(addr, size);
+                if (rc) {
+                        printk(KERN_ERR
+                               "%s() cannot unmap nonexistent range 0x%lx\n",
+                                __FUNCTION__, addr);
+                        return 1;
+                }
+        } else {
+                iounmap((void __iomem *) area->addr);
+        }
+        /*
+         * FIXME! This can't be right:
+        iounmap(area->addr);
+         * Maybe it should be "iounmap(area);"
+         */
+        return 0;
+}
+
+#endif
+
+EXPORT_SYMBOL(ioremap);
+EXPORT_SYMBOL(__ioremap);
+EXPORT_SYMBOL(iounmap);