Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

5 files changed, 1668 insertions, 0 deletions

diff --git a/arch/parisc/mm/Makefile b/arch/parisc/mm/Makefile
new file mode 100644
index 000000000000..758ceefb373a
--- /dev/null
+++ b/arch/parisc/mm/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for arch/parisc/mm
+#
+
+obj-y	 := init.o fault.o ioremap.o
diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c
new file mode 100644
index 000000000000..eaa701479f5f
--- /dev/null
+++ b/arch/parisc/mm/fault.c
@@ -0,0 +1,271 @@
+/* $Id: fault.c,v 1.5 2000/01/26 16:20:29 jsm Exp $
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ *
+ * Copyright (C) 1995, 1996, 1997, 1998 by Ralf Baechle
+ * Copyright 1999 SuSE GmbH (Philipp Rumpf, prumpf@tux.org)
+ * Copyright 1999 Hewlett Packard Co.
+ *
+ */
+
+#include <linux/mm.h>
+#include <linux/ptrace.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+
+#include <asm/uaccess.h>
+#include <asm/traps.h>
+
+#define PRINT_USER_FAULTS /* (turn this on if you want user faults to be */
+			 /*  dumped to the console via printk)          */
+
+
+/* Defines for parisc_acctyp()	*/
+#define READ		0
+#define WRITE		1
+
+/* Various important other fields */
+#define bit22set(x)		(x & 0x00000200)
+#define bits23_25set(x)		(x & 0x000001c0)
+#define isGraphicsFlushRead(x)	((x & 0xfc003fdf) == 0x04001a80)
+				/* extended opcode is 0x6a */
+
+#define BITSSET		0x1c0	/* for identifying LDCW */
+
+
+DEFINE_PER_CPU(struct exception_data, exception_data);
+
+/*
+ * parisc_acctyp(unsigned int inst) --
+ *    Given a PA-RISC memory access instruction, determine if the
+ *    the instruction would perform a memory read or memory write
+ *    operation.
+ *
+ *    This function assumes that the given instruction is a memory access
+ *    instruction (i.e. you should really only call it if you know that
+ *    the instruction has generated some sort of a memory access fault).
+ *
+ * Returns:
+ *   VM_READ  if read operation
+ *   VM_WRITE if write operation
+ *   VM_EXEC  if execute operation
+ */
+static unsigned long
+parisc_acctyp(unsigned long code, unsigned int inst)
+{
+	if (code == 6 || code == 16)
+	    return VM_EXEC;
+
+	switch (inst & 0xf0000000) {
+	case 0x40000000: /* load */
+	case 0x50000000: /* new load */
+		return VM_READ;
+
+	case 0x60000000: /* store */
+	case 0x70000000: /* new store */
+		return VM_WRITE;
+
+	case 0x20000000: /* coproc */
+	case 0x30000000: /* coproc2 */
+		if (bit22set(inst))
+			return VM_WRITE;
+
+	case 0x0: /* indexed/memory management */
+		if (bit22set(inst)) {
+			/*
+			 * Check for the 'Graphics Flush Read' instruction.
+			 * It resembles an FDC instruction, except for bits
+			 * 20 and 21. Any combination other than zero will
+			 * utilize the block mover functionality on some
+			 * older PA-RISC platforms.  The case where a block
+			 * move is performed from VM to graphics IO space
+			 * should be treated as a READ.
+			 *
+			 * The significance of bits 20,21 in the FDC
+			 * instruction is:
+			 *
+			 *   00  Flush data cache (normal instruction behavior)
+			 *   01  Graphics flush write  (IO space -> VM)
+			 *   10  Graphics flush read   (VM -> IO space)
+			 *   11  Graphics flush read/write (VM <-> IO space)
+			 */
+			if (isGraphicsFlushRead(inst))
+				return VM_READ;
+			return VM_WRITE;
+		} else {
+			/*
+			 * Check for LDCWX and LDCWS (semaphore instructions).
+			 * If bits 23 through 25 are all 1's it is one of
+			 * the above two instructions and is a write.
+			 *
+			 * Note: With the limited bits we are looking at,
+			 * this will also catch PROBEW and PROBEWI. However,
+			 * these should never get in here because they don't
+			 * generate exceptions of the type:
+			 *   Data TLB miss fault/data page fault
+			 *   Data memory protection trap
+			 */
+			if (bits23_25set(inst) == BITSSET)
+				return VM_WRITE;
+		}
+		return VM_READ; /* Default */
+	}
+	return VM_READ; /* Default */
+}
+
+#undef bit22set
+#undef bits23_25set
+#undef isGraphicsFlushRead
+#undef BITSSET
+
+
+#if 0
+/* This is the treewalk to find a vma which is the highest that has
+ * a start < addr.  We're using find_vma_prev instead right now, but
+ * we might want to use this at some point in the future.  Probably
+ * not, but I want it committed to CVS so I don't lose it :-)
+ */
+			while (tree != vm_avl_empty) {
+				if (tree->vm_start > addr) {
+					tree = tree->vm_avl_left;
+				} else {
+					prev = tree;
+					if (prev->vm_next == NULL)
+						break;
+					if (prev->vm_next->vm_start > addr)
+						break;
+					tree = tree->vm_avl_right;
+				}
+			}
+#endif
+
+void do_page_fault(struct pt_regs *regs, unsigned long code,
+			      unsigned long address)
+{
+	struct vm_area_struct *vma, *prev_vma;
+	struct task_struct *tsk = current;
+	struct mm_struct *mm = tsk->mm;
+	const struct exception_table_entry *fix;
+	unsigned long acc_type;
+
+	if (in_interrupt() || !mm)
+		goto no_context;
+
+	down_read(&mm->mmap_sem);
+	vma = find_vma_prev(mm, address, &prev_vma);
+	if (!vma || address < vma->vm_start)
+		goto check_expansion;
+/*
+ * Ok, we have a good vm_area for this memory access. We still need to
+ * check the access permissions.
+ */
+
+good_area:
+
+	acc_type = parisc_acctyp(code,regs->iir);
+
+	if ((vma->vm_flags & acc_type) != acc_type)
+		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.
+	 */
+
+	switch (handle_mm_fault(mm, vma, address, (acc_type & VM_WRITE) != 0)) {
+	      case 1:
+		++current->min_flt;
+		break;
+	      case 2:
+		++current->maj_flt;
+		break;
+	      case 0:
+		/*
+		 * We ran out of memory, or some other thing happened
+		 * to us that made us unable to handle the page fault
+		 * gracefully.
+		 */
+		goto bad_area;
+	      default:
+		goto out_of_memory;
+	}
+	up_read(&mm->mmap_sem);
+	return;
+
+check_expansion:
+	vma = prev_vma;
+	if (vma && (expand_stack(vma, address) == 0))
+		goto good_area;
+
+/*
+ * Something tried to access memory that isn't in our memory map..
+ */
+bad_area:
+	up_read(&mm->mmap_sem);
+
+	if (user_mode(regs)) {
+		struct siginfo si;
+
+#ifdef PRINT_USER_FAULTS
+		printk(KERN_DEBUG "\n");
+		printk(KERN_DEBUG "do_page_fault() pid=%d command='%s' type=%lu address=0x%08lx\n",
+		    tsk->pid, tsk->comm, code, address);
+		if (vma) {
+			printk(KERN_DEBUG "vm_start = 0x%08lx, vm_end = 0x%08lx\n",
+					vma->vm_start, vma->vm_end);
+		}
+		show_regs(regs);
+#endif
+		/* FIXME: actually we need to get the signo and code correct */
+		si.si_signo = SIGSEGV;
+		si.si_errno = 0;
+		si.si_code = SEGV_MAPERR;
+		si.si_addr = (void __user *) address;
+		force_sig_info(SIGSEGV, &si, current);
+		return;
+	}
+
+no_context:
+
+	if (!user_mode(regs)) {
+		fix = search_exception_tables(regs->iaoq[0]);
+
+		if (fix) {
+			struct exception_data *d;
+
+			d = &__get_cpu_var(exception_data);
+			d->fault_ip = regs->iaoq[0];
+			d->fault_space = regs->isr;
+			d->fault_addr = regs->ior;
+
+			regs->iaoq[0] = ((fix->fixup) & ~3);
+
+			/*
+			 * NOTE: In some cases the faulting instruction
+			 * may be in the delay slot of a branch. We
+			 * don't want to take the branch, so we don't
+			 * increment iaoq[1], instead we set it to be
+			 * iaoq[0]+4, and clear the B bit in the PSW
+			 */
+
+			regs->iaoq[1] = regs->iaoq[0] + 4;
+			regs->gr[0] &= ~PSW_B; /* IPSW in gr[0] */
+
+			return;
+		}
+	}
+
+	parisc_terminate("Bad Address (null pointer deref?)", regs, code, address);
+
+  out_of_memory:
+	up_read(&mm->mmap_sem);
+	printk(KERN_CRIT "VM: killing process %s\n", current->comm);
+	if (user_mode(regs))
+		do_exit(SIGKILL);
+	goto no_context;
+}
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
new file mode 100644
index 000000000000..cac37589e35c
--- /dev/null
+++ b/arch/parisc/mm/init.c
@@ -0,0 +1,1019 @@
+/*
+ *  linux/arch/parisc/mm/init.c
+ *
+ *  Copyright (C) 1995	Linus Torvalds
+ *  Copyright 1999 SuSE GmbH
+ *    changed by Philipp Rumpf
+ *  Copyright 1999 Philipp Rumpf (prumpf@tux.org)
+ *  Copyright 2004 Randolph Chung (tausq@debian.org)
+ *
+ */
+
+#include <linux/config.h>
+
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/bootmem.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/pci.h>		/* for hppa_dma_ops and pcxl_dma_ops */
+#include <linux/initrd.h>
+#include <linux/swap.h>
+#include <linux/unistd.h>
+#include <linux/nodemask.h>	/* for node_online_map */
+#include <linux/pagemap.h>	/* for release_pages and page_cache_release */
+
+#include <asm/pgalloc.h>
+#include <asm/tlb.h>
+#include <asm/pdc_chassis.h>
+#include <asm/mmzone.h>
+
+DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
+
+extern char _text;	/* start of kernel code, defined by linker */
+extern int  data_start;
+extern char _end;	/* end of BSS, defined by linker */
+extern char __init_begin, __init_end;
+
+#ifdef CONFIG_DISCONTIGMEM
+struct node_map_data node_data[MAX_NUMNODES];
+bootmem_data_t bmem_data[MAX_NUMNODES];
+unsigned char pfnnid_map[PFNNID_MAP_MAX];
+#endif
+
+static struct resource data_resource = {
+	.name	= "Kernel data",
+	.flags	= IORESOURCE_BUSY | IORESOURCE_MEM,
+};
+
+static struct resource code_resource = {
+	.name	= "Kernel code",
+	.flags	= IORESOURCE_BUSY | IORESOURCE_MEM,
+};
+
+static struct resource pdcdata_resource = {
+	.name	= "PDC data (Page Zero)",
+	.start	= 0,
+	.end	= 0x9ff,
+	.flags	= IORESOURCE_BUSY | IORESOURCE_MEM,
+};
+
+static struct resource sysram_resources[MAX_PHYSMEM_RANGES];
+
+/* The following array is initialized from the firmware specific
+ * information retrieved in kernel/inventory.c.
+ */
+
+physmem_range_t pmem_ranges[MAX_PHYSMEM_RANGES];
+int npmem_ranges;
+
+#ifdef __LP64__
+#define MAX_MEM         (~0UL)
+#else /* !__LP64__ */
+#define MAX_MEM         (3584U*1024U*1024U)
+#endif /* !__LP64__ */
+
+static unsigned long mem_limit = MAX_MEM;
+
+static void __init mem_limit_func(void)
+{
+	char *cp, *end;
+	unsigned long limit;
+	extern char saved_command_line[];
+
+	/* We need this before __setup() functions are called */
+
+	limit = MAX_MEM;
+	for (cp = saved_command_line; *cp; ) {
+		if (memcmp(cp, "mem=", 4) == 0) {
+			cp += 4;
+			limit = memparse(cp, &end);
+			if (end != cp)
+				break;
+			cp = end;
+		} else {
+			while (*cp != ' ' && *cp)
+				++cp;
+			while (*cp == ' ')
+				++cp;
+		}
+	}
+
+	if (limit < mem_limit)
+		mem_limit = limit;
+}
+
+#define MAX_GAP (0x40000000UL >> PAGE_SHIFT)
+
+static void __init setup_bootmem(void)
+{
+	unsigned long bootmap_size;
+	unsigned long mem_max;
+	unsigned long bootmap_pages;
+	unsigned long bootmap_start_pfn;
+	unsigned long bootmap_pfn;
+#ifndef CONFIG_DISCONTIGMEM
+	physmem_range_t pmem_holes[MAX_PHYSMEM_RANGES - 1];
+	int npmem_holes;
+#endif
+	int i, sysram_resource_count;
+
+	disable_sr_hashing(); /* Turn off space register hashing */
+
+	/*
+	 * Sort the ranges. Since the number of ranges is typically
+	 * small, and performance is not an issue here, just do
+	 * a simple insertion sort.
+	 */
+
+	for (i = 1; i < npmem_ranges; i++) {
+		int j;
+
+		for (j = i; j > 0; j--) {
+			unsigned long tmp;
+
+			if (pmem_ranges[j-1].start_pfn <
+			    pmem_ranges[j].start_pfn) {
+
+				break;
+			}
+			tmp = pmem_ranges[j-1].start_pfn;
+			pmem_ranges[j-1].start_pfn = pmem_ranges[j].start_pfn;
+			pmem_ranges[j].start_pfn = tmp;
+			tmp = pmem_ranges[j-1].pages;
+			pmem_ranges[j-1].pages = pmem_ranges[j].pages;
+			pmem_ranges[j].pages = tmp;
+		}
+	}
+
+#ifndef CONFIG_DISCONTIGMEM
+	/*
+	 * Throw out ranges that are too far apart (controlled by
+	 * MAX_GAP).
+	 */
+
+	for (i = 1; i < npmem_ranges; i++) {
+		if (pmem_ranges[i].start_pfn -
+			(pmem_ranges[i-1].start_pfn +
+			 pmem_ranges[i-1].pages) > MAX_GAP) {
+			npmem_ranges = i;
+			printk("Large gap in memory detected (%ld pages). "
+			       "Consider turning on CONFIG_DISCONTIGMEM\n",
+			       pmem_ranges[i].start_pfn -
+			       (pmem_ranges[i-1].start_pfn +
+			        pmem_ranges[i-1].pages));
+			break;
+		}
+	}
+#endif
+
+	if (npmem_ranges > 1) {
+
+		/* Print the memory ranges */
+
+		printk(KERN_INFO "Memory Ranges:\n");
+
+		for (i = 0; i < npmem_ranges; i++) {
+			unsigned long start;
+			unsigned long size;
+
+			size = (pmem_ranges[i].pages << PAGE_SHIFT);
+			start = (pmem_ranges[i].start_pfn << PAGE_SHIFT);
+			printk(KERN_INFO "%2d) Start 0x%016lx End 0x%016lx Size %6ld MB\n",
+				i,start, start + (size - 1), size >> 20);
+		}
+	}
+
+	sysram_resource_count = npmem_ranges;
+	for (i = 0; i < sysram_resource_count; i++) {
+		struct resource *res = &sysram_resources[i];
+		res->name = "System RAM";
+		res->start = pmem_ranges[i].start_pfn << PAGE_SHIFT;
+		res->end = res->start + (pmem_ranges[i].pages << PAGE_SHIFT)-1;
+		res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+		request_resource(&iomem_resource, res);
+	}
+
+	/*
+	 * For 32 bit kernels we limit the amount of memory we can
+	 * support, in order to preserve enough kernel address space
+	 * for other purposes. For 64 bit kernels we don't normally
+	 * limit the memory, but this mechanism can be used to
+	 * artificially limit the amount of memory (and it is written
+	 * to work with multiple memory ranges).
+	 */
+
+	mem_limit_func();       /* check for "mem=" argument */
+
+	mem_max = 0;
+	num_physpages = 0;
+	for (i = 0; i < npmem_ranges; i++) {
+		unsigned long rsize;
+
+		rsize = pmem_ranges[i].pages << PAGE_SHIFT;
+		if ((mem_max + rsize) > mem_limit) {
+			printk(KERN_WARNING "Memory truncated to %ld MB\n", mem_limit >> 20);
+			if (mem_max == mem_limit)
+				npmem_ranges = i;
+			else {
+				pmem_ranges[i].pages =   (mem_limit >> PAGE_SHIFT)
+						       - (mem_max >> PAGE_SHIFT);
+				npmem_ranges = i + 1;
+				mem_max = mem_limit;
+			}
+	        num_physpages += pmem_ranges[i].pages;
+			break;
+		}
+	    num_physpages += pmem_ranges[i].pages;
+		mem_max += rsize;
+	}
+
+	printk(KERN_INFO "Total Memory: %ld MB\n",mem_max >> 20);
+
+#ifndef CONFIG_DISCONTIGMEM
+	/* Merge the ranges, keeping track of the holes */
+
+	{
+		unsigned long end_pfn;
+		unsigned long hole_pages;
+
+		npmem_holes = 0;
+		end_pfn = pmem_ranges[0].start_pfn + pmem_ranges[0].pages;
+		for (i = 1; i < npmem_ranges; i++) {
+
+			hole_pages = pmem_ranges[i].start_pfn - end_pfn;
+			if (hole_pages) {
+				pmem_holes[npmem_holes].start_pfn = end_pfn;
+				pmem_holes[npmem_holes++].pages = hole_pages;
+				end_pfn += hole_pages;
+			}
+			end_pfn += pmem_ranges[i].pages;
+		}
+
+		pmem_ranges[0].pages = end_pfn - pmem_ranges[0].start_pfn;
+		npmem_ranges = 1;
+	}
+#endif
+
+	bootmap_pages = 0;
+	for (i = 0; i < npmem_ranges; i++)
+		bootmap_pages += bootmem_bootmap_pages(pmem_ranges[i].pages);
+
+	bootmap_start_pfn = PAGE_ALIGN(__pa((unsigned long) &_end)) >> PAGE_SHIFT;
+
+#ifdef CONFIG_DISCONTIGMEM
+	for (i = 0; i < MAX_PHYSMEM_RANGES; i++) {
+		memset(NODE_DATA(i), 0, sizeof(pg_data_t));
+		NODE_DATA(i)->bdata = &bmem_data[i];
+	}
+	memset(pfnnid_map, 0xff, sizeof(pfnnid_map));
+
+	for (i = 0; i < npmem_ranges; i++)
+		node_set_online(i);
+#endif
+
+	/*
+	 * Initialize and free the full range of memory in each range.
+	 * Note that the only writing these routines do are to the bootmap,
+	 * and we've made sure to locate the bootmap properly so that they
+	 * won't be writing over anything important.
+	 */
+
+	bootmap_pfn = bootmap_start_pfn;
+	max_pfn = 0;
+	for (i = 0; i < npmem_ranges; i++) {
+		unsigned long start_pfn;
+		unsigned long npages;
+
+		start_pfn = pmem_ranges[i].start_pfn;
+		npages = pmem_ranges[i].pages;
+
+		bootmap_size = init_bootmem_node(NODE_DATA(i),
+						bootmap_pfn,
+						start_pfn,
+						(start_pfn + npages) );
+		free_bootmem_node(NODE_DATA(i),
+				  (start_pfn << PAGE_SHIFT),
+				  (npages << PAGE_SHIFT) );
+		bootmap_pfn += (bootmap_size + PAGE_SIZE - 1) >> PAGE_SHIFT;
+		if ((start_pfn + npages) > max_pfn)
+			max_pfn = start_pfn + npages;
+	}
+
+	if ((bootmap_pfn - bootmap_start_pfn) != bootmap_pages) {
+		printk(KERN_WARNING "WARNING! bootmap sizing is messed up!\n");
+		BUG();
+	}
+
+	/* reserve PAGE0 pdc memory, kernel text/data/bss & bootmap */
+
+#define PDC_CONSOLE_IO_IODC_SIZE 32768
+
+	reserve_bootmem_node(NODE_DATA(0), 0UL,
+			(unsigned long)(PAGE0->mem_free + PDC_CONSOLE_IO_IODC_SIZE));
+	reserve_bootmem_node(NODE_DATA(0),__pa((unsigned long)&_text),
+			(unsigned long)(&_end - &_text));
+	reserve_bootmem_node(NODE_DATA(0), (bootmap_start_pfn << PAGE_SHIFT),
+			((bootmap_pfn - bootmap_start_pfn) << PAGE_SHIFT));
+
+#ifndef CONFIG_DISCONTIGMEM
+
+	/* reserve the holes */
+
+	for (i = 0; i < npmem_holes; i++) {
+		reserve_bootmem_node(NODE_DATA(0),
+				(pmem_holes[i].start_pfn << PAGE_SHIFT),
+				(pmem_holes[i].pages << PAGE_SHIFT));
+	}
+#endif
+
+#ifdef CONFIG_BLK_DEV_INITRD
+	if (initrd_start) {
+		printk(KERN_INFO "initrd: %08lx-%08lx\n", initrd_start, initrd_end);
+		if (__pa(initrd_start) < mem_max) {
+			unsigned long initrd_reserve;
+
+			if (__pa(initrd_end) > mem_max) {
+				initrd_reserve = mem_max - __pa(initrd_start);
+			} else {
+				initrd_reserve = initrd_end - initrd_start;
+			}
+			initrd_below_start_ok = 1;
+			printk(KERN_INFO "initrd: reserving %08lx-%08lx (mem_max %08lx)\n", __pa(initrd_start), __pa(initrd_start) + initrd_reserve, mem_max);
+
+			reserve_bootmem_node(NODE_DATA(0),__pa(initrd_start), initrd_reserve);
+		}
+	}
+#endif
+
+	data_resource.start =  virt_to_phys(&data_start);
+	data_resource.end = virt_to_phys(&_end)-1;
+	code_resource.start = virt_to_phys(&_text);
+	code_resource.end = virt_to_phys(&data_start)-1;
+
+	/* We don't know which region the kernel will be in, so try
+	 * all of them.
+	 */
+	for (i = 0; i < sysram_resource_count; i++) {
+		struct resource *res = &sysram_resources[i];
+		request_resource(res, &code_resource);
+		request_resource(res, &data_resource);
+	}
+	request_resource(&sysram_resources[0], &pdcdata_resource);
+}
+
+void free_initmem(void)
+{
+	/* FIXME: */
+#if 0
+	printk(KERN_INFO "NOT FREEING INITMEM (%dk)\n",
+			(&__init_end - &__init_begin) >> 10);
+	return;
+#else
+	unsigned long addr;
+	
+	printk(KERN_INFO "Freeing unused kernel memory: ");
+
+#if 1
+	/* Attempt to catch anyone trying to execute code here
+	 * by filling the page with BRK insns.
+	 * 
+	 * If we disable interrupts for all CPUs, then IPI stops working.
+	 * Kinda breaks the global cache flushing.
+	 */
+	local_irq_disable();
+
+	memset(&__init_begin, 0x00, 
+		(unsigned long)&__init_end - (unsigned long)&__init_begin);
+
+	flush_data_cache();
+	asm volatile("sync" : : );
+	flush_icache_range((unsigned long)&__init_begin, (unsigned long)&__init_end);
+	asm volatile("sync" : : );
+
+	local_irq_enable();
+#endif
+	
+	addr = (unsigned long)(&__init_begin);
+	for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
+		ClearPageReserved(virt_to_page(addr));
+		set_page_count(virt_to_page(addr), 1);
+		free_page(addr);
+		num_physpages++;
+		totalram_pages++;
+	}
+
+	/* set up a new led state on systems shipped LED State panel */
+	pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BCOMPLETE);
+	
+	printk("%luk freed\n", (unsigned long)(&__init_end - &__init_begin) >> 10);
+#endif
+}
+
+/*
+ * Just an arbitrary offset to serve as a "hole" between mapping areas
+ * (between top of physical memory and a potential pcxl dma mapping
+ * area, and below the vmalloc mapping area).
+ *
+ * The current 32K value just means that there will be a 32K "hole"
+ * between mapping areas. That means that  any out-of-bounds memory
+ * accesses will hopefully be caught. The vmalloc() routines leaves
+ * a hole of 4kB between each vmalloced area for the same reason.
+ */
+
+ /* Leave room for gateway page expansion */
+#if KERNEL_MAP_START < GATEWAY_PAGE_SIZE
+#error KERNEL_MAP_START is in gateway reserved region
+#endif
+#define MAP_START (KERNEL_MAP_START)
+
+#define VM_MAP_OFFSET  (32*1024)
+#define SET_MAP_OFFSET(x) ((void *)(((unsigned long)(x) + VM_MAP_OFFSET) \
+				     & ~(VM_MAP_OFFSET-1)))
+
+void *vmalloc_start;
+EXPORT_SYMBOL(vmalloc_start);
+
+#ifdef CONFIG_PA11
+unsigned long pcxl_dma_start;
+#endif
+
+void __init mem_init(void)
+{
+	high_memory = __va((max_pfn << PAGE_SHIFT));
+
+#ifndef CONFIG_DISCONTIGMEM
+	max_mapnr = page_to_pfn(virt_to_page(high_memory - 1)) + 1;
+	totalram_pages += free_all_bootmem();
+#else
+	{
+		int i;
+
+		for (i = 0; i < npmem_ranges; i++)
+			totalram_pages += free_all_bootmem_node(NODE_DATA(i));
+	}
+#endif
+
+	printk(KERN_INFO "Memory: %luk available\n", num_physpages << (PAGE_SHIFT-10));
+
+#ifdef CONFIG_PA11
+	if (hppa_dma_ops == &pcxl_dma_ops) {
+		pcxl_dma_start = (unsigned long)SET_MAP_OFFSET(MAP_START);
+		vmalloc_start = SET_MAP_OFFSET(pcxl_dma_start + PCXL_DMA_MAP_SIZE);
+	} else {
+		pcxl_dma_start = 0;
+		vmalloc_start = SET_MAP_OFFSET(MAP_START);
+	}
+#else
+	vmalloc_start = SET_MAP_OFFSET(MAP_START);
+#endif
+
+}
+
+int do_check_pgt_cache(int low, int high)
+{
+	return 0;
+}
+
+unsigned long *empty_zero_page;
+
+void show_mem(void)
+{
+	int i,free = 0,total = 0,reserved = 0;
+	int shared = 0, cached = 0;
+
+	printk(KERN_INFO "Mem-info:\n");
+	show_free_areas();
+	printk(KERN_INFO "Free swap:	 %6ldkB\n",
+				nr_swap_pages<<(PAGE_SHIFT-10));
+#ifndef CONFIG_DISCONTIGMEM
+	i = max_mapnr;
+	while (i-- > 0) {
+		total++;
+		if (PageReserved(mem_map+i))
+			reserved++;
+		else if (PageSwapCache(mem_map+i))
+			cached++;
+		else if (!page_count(&mem_map[i]))
+			free++;
+		else
+			shared += page_count(&mem_map[i]) - 1;
+	}
+#else
+	for (i = 0; i < npmem_ranges; i++) {
+		int j;
+
+		for (j = node_start_pfn(i); j < node_end_pfn(i); j++) {
+			struct page *p;
+
+			p = node_mem_map(i) + j - node_start_pfn(i);
+
+			total++;
+			if (PageReserved(p))
+				reserved++;
+			else if (PageSwapCache(p))
+				cached++;
+			else if (!page_count(p))
+				free++;
+			else
+				shared += page_count(p) - 1;
+        	}
+	}
+#endif
+	printk(KERN_INFO "%d pages of RAM\n", total);
+	printk(KERN_INFO "%d reserved pages\n", reserved);
+	printk(KERN_INFO "%d pages shared\n", shared);
+	printk(KERN_INFO "%d pages swap cached\n", cached);
+
+
+#ifdef CONFIG_DISCONTIGMEM
+	{
+		struct zonelist *zl;
+		int i, j, k;
+
+		for (i = 0; i < npmem_ranges; i++) {
+			for (j = 0; j < MAX_NR_ZONES; j++) {
+				zl = NODE_DATA(i)->node_zonelists + j;
+
+				printk("Zone list for zone %d on node %d: ", j, i);
+				for (k = 0; zl->zones[k] != NULL; k++) 
+					printk("[%d/%s] ", zl->zones[k]->zone_pgdat->node_id, zl->zones[k]->name);
+				printk("\n");
+			}
+		}
+	}
+#endif
+}
+
+
+static void __init map_pages(unsigned long start_vaddr, unsigned long start_paddr, unsigned long size, pgprot_t pgprot)
+{
+	pgd_t *pg_dir;
+	pmd_t *pmd;
+	pte_t *pg_table;
+	unsigned long end_paddr;
+	unsigned long start_pmd;
+	unsigned long start_pte;
+	unsigned long tmp1;
+	unsigned long tmp2;
+	unsigned long address;
+	unsigned long ro_start;
+	unsigned long ro_end;
+	unsigned long fv_addr;
+	unsigned long gw_addr;
+	extern const unsigned long fault_vector_20;
+	extern void * const linux_gateway_page;
+
+	ro_start = __pa((unsigned long)&_text);
+	ro_end   = __pa((unsigned long)&data_start);
+	fv_addr  = __pa((unsigned long)&fault_vector_20) & PAGE_MASK;
+	gw_addr  = __pa((unsigned long)&linux_gateway_page) & PAGE_MASK;
+
+	end_paddr = start_paddr + size;
+
+	pg_dir = pgd_offset_k(start_vaddr);
+
+#if PTRS_PER_PMD == 1
+	start_pmd = 0;
+#else
+	start_pmd = ((start_vaddr >> PMD_SHIFT) & (PTRS_PER_PMD - 1));
+#endif
+	start_pte = ((start_vaddr >> PAGE_SHIFT) & (PTRS_PER_PTE - 1));
+
+	address = start_paddr;
+	while (address < end_paddr) {
+#if PTRS_PER_PMD == 1
+		pmd = (pmd_t *)__pa(pg_dir);
+#else
+		pmd = (pmd_t *)pgd_address(*pg_dir);
+
+		/*
+		 * pmd is physical at this point
+		 */
+
+		if (!pmd) {
+			pmd = (pmd_t *) alloc_bootmem_low_pages_node(NODE_DATA(0),PAGE_SIZE << PMD_ORDER);
+			pmd = (pmd_t *) __pa(pmd);
+		}
+
+		pgd_populate(NULL, pg_dir, __va(pmd));
+#endif
+		pg_dir++;
+
+		/* now change pmd to kernel virtual addresses */
+
+		pmd = (pmd_t *)__va(pmd) + start_pmd;
+		for (tmp1 = start_pmd; tmp1 < PTRS_PER_PMD; tmp1++,pmd++) {
+
+			/*
+			 * pg_table is physical at this point
+			 */
+
+			pg_table = (pte_t *)pmd_address(*pmd);
+			if (!pg_table) {
+				pg_table = (pte_t *)
+					alloc_bootmem_low_pages_node(NODE_DATA(0),PAGE_SIZE);
+				pg_table = (pte_t *) __pa(pg_table);
+			}
+
+			pmd_populate_kernel(NULL, pmd, __va(pg_table));
+
+			/* now change pg_table to kernel virtual addresses */
+
+			pg_table = (pte_t *) __va(pg_table) + start_pte;
+			for (tmp2 = start_pte; tmp2 < PTRS_PER_PTE; tmp2++,pg_table++) {
+				pte_t pte;
+
+				/*
+				 * Map the fault vector writable so we can
+				 * write the HPMC checksum.
+				 */
+				if (address >= ro_start && address < ro_end
+							&& address != fv_addr
+							&& address != gw_addr)
+				    pte = __mk_pte(address, PAGE_KERNEL_RO);
+				else
+				    pte = __mk_pte(address, pgprot);
+
+				if (address >= end_paddr)
+					pte_val(pte) = 0;
+
+				set_pte(pg_table, pte);
+
+				address += PAGE_SIZE;
+			}
+			start_pte = 0;
+
+			if (address >= end_paddr)
+			    break;
+		}
+		start_pmd = 0;
+	}
+}
+
+/*
+ * pagetable_init() sets up the page tables
+ *
+ * Note that gateway_init() places the Linux gateway page at page 0.
+ * Since gateway pages cannot be dereferenced this has the desirable
+ * side effect of trapping those pesky NULL-reference errors in the
+ * kernel.
+ */
+static void __init pagetable_init(void)
+{
+	int range;
+
+	/* Map each physical memory range to its kernel vaddr */
+
+	for (range = 0; range < npmem_ranges; range++) {
+		unsigned long start_paddr;
+		unsigned long end_paddr;
+		unsigned long size;
+
+		start_paddr = pmem_ranges[range].start_pfn << PAGE_SHIFT;
+		end_paddr = start_paddr + (pmem_ranges[range].pages << PAGE_SHIFT);
+		size = pmem_ranges[range].pages << PAGE_SHIFT;
+
+		map_pages((unsigned long)__va(start_paddr), start_paddr,
+			size, PAGE_KERNEL);
+	}
+
+#ifdef CONFIG_BLK_DEV_INITRD
+	if (initrd_end && initrd_end > mem_limit) {
+		printk("initrd: mapping %08lx-%08lx\n", initrd_start, initrd_end);
+		map_pages(initrd_start, __pa(initrd_start),
+			initrd_end - initrd_start, PAGE_KERNEL);
+	}
+#endif
+
+	empty_zero_page = alloc_bootmem_pages(PAGE_SIZE);
+	memset(empty_zero_page, 0, PAGE_SIZE);
+}
+
+static void __init gateway_init(void)
+{
+	unsigned long linux_gateway_page_addr;
+	/* FIXME: This is 'const' in order to trick the compiler
+	   into not treating it as DP-relative data. */
+	extern void * const linux_gateway_page;
+
+	linux_gateway_page_addr = LINUX_GATEWAY_ADDR & PAGE_MASK;
+
+	/*
+	 * Setup Linux Gateway page.
+	 *
+	 * The Linux gateway page will reside in kernel space (on virtual
+	 * page 0), so it doesn't need to be aliased into user space.
+	 */
+
+	map_pages(linux_gateway_page_addr, __pa(&linux_gateway_page),
+		PAGE_SIZE, PAGE_GATEWAY);
+}
+
+#ifdef CONFIG_HPUX
+void
+map_hpux_gateway_page(struct task_struct *tsk, struct mm_struct *mm)
+{
+	pgd_t *pg_dir;
+	pmd_t *pmd;
+	pte_t *pg_table;
+	unsigned long start_pmd;
+	unsigned long start_pte;
+	unsigned long address;
+	unsigned long hpux_gw_page_addr;
+	/* FIXME: This is 'const' in order to trick the compiler
+	   into not treating it as DP-relative data. */
+	extern void * const hpux_gateway_page;
+
+	hpux_gw_page_addr = HPUX_GATEWAY_ADDR & PAGE_MASK;
+
+	/*
+	 * Setup HP-UX Gateway page.
+	 *
+	 * The HP-UX gateway page resides in the user address space,
+	 * so it needs to be aliased into each process.
+	 */
+
+	pg_dir = pgd_offset(mm,hpux_gw_page_addr);
+
+#if PTRS_PER_PMD == 1
+	start_pmd = 0;
+#else
+	start_pmd = ((hpux_gw_page_addr >> PMD_SHIFT) & (PTRS_PER_PMD - 1));
+#endif
+	start_pte = ((hpux_gw_page_addr >> PAGE_SHIFT) & (PTRS_PER_PTE - 1));
+
+	address = __pa(&hpux_gateway_page);
+#if PTRS_PER_PMD == 1
+	pmd = (pmd_t *)__pa(pg_dir);
+#else
+	pmd = (pmd_t *) pgd_address(*pg_dir);
+
+	/*
+	 * pmd is physical at this point
+	 */
+
+	if (!pmd) {
+		pmd = (pmd_t *) get_zeroed_page(GFP_KERNEL);
+		pmd = (pmd_t *) __pa(pmd);
+	}
+
+	__pgd_val_set(*pg_dir, PxD_FLAG_PRESENT | PxD_FLAG_VALID | (unsigned long) pmd);
+#endif
+	/* now change pmd to kernel virtual addresses */
+
+	pmd = (pmd_t *)__va(pmd) + start_pmd;
+
+	/*
+	 * pg_table is physical at this point
+	 */
+
+	pg_table = (pte_t *) pmd_address(*pmd);
+	if (!pg_table)
+		pg_table = (pte_t *) __pa(get_zeroed_page(GFP_KERNEL));
+
+	__pmd_val_set(*pmd, PxD_FLAG_PRESENT | PxD_FLAG_VALID | (unsigned long) pg_table);
+
+	/* now change pg_table to kernel virtual addresses */
+
+	pg_table = (pte_t *) __va(pg_table) + start_pte;
+	set_pte(pg_table, __mk_pte(address, PAGE_GATEWAY));
+}
+EXPORT_SYMBOL(map_hpux_gateway_page);
+#endif
+
+extern void flush_tlb_all_local(void);
+
+void __init paging_init(void)
+{
+	int i;
+
+	setup_bootmem();
+	pagetable_init();
+	gateway_init();
+	flush_cache_all_local(); /* start with known state */
+	flush_tlb_all_local();
+
+	for (i = 0; i < npmem_ranges; i++) {
+		unsigned long zones_size[MAX_NR_ZONES] = { 0, 0, 0 };
+
+		/* We have an IOMMU, so all memory can go into a single
+		   ZONE_DMA zone. */
+		zones_size[ZONE_DMA] = pmem_ranges[i].pages;
+
+#ifdef CONFIG_DISCONTIGMEM
+		/* Need to initialize the pfnnid_map before we can initialize
+		   the zone */
+		{
+		    int j;
+		    for (j = (pmem_ranges[i].start_pfn >> PFNNID_SHIFT);
+			 j <= ((pmem_ranges[i].start_pfn + pmem_ranges[i].pages) >> PFNNID_SHIFT);
+			 j++) {
+			pfnnid_map[j] = i;
+		    }
+		}
+#endif
+
+		free_area_init_node(i, NODE_DATA(i), zones_size,
+				pmem_ranges[i].start_pfn, NULL);
+	}
+}
+
+#ifdef CONFIG_PA20
+
+/*
+ * Currently, all PA20 chips have 18 bit protection id's, which is the
+ * limiting factor (space ids are 32 bits).
+ */
+
+#define NR_SPACE_IDS 262144
+
+#else
+
+/*
+ * Currently we have a one-to-one relationship between space id's and
+ * protection id's. Older parisc chips (PCXS, PCXT, PCXL, PCXL2) only
+ * support 15 bit protection id's, so that is the limiting factor.
+ * PCXT' has 18 bit protection id's, but only 16 bit spaceids, so it's
+ * probably not worth the effort for a special case here.
+ */
+
+#define NR_SPACE_IDS 32768
+
+#endif  /* !CONFIG_PA20 */
+
+#define RECYCLE_THRESHOLD (NR_SPACE_IDS / 2)
+#define SID_ARRAY_SIZE  (NR_SPACE_IDS / (8 * sizeof(long)))
+
+static unsigned long space_id[SID_ARRAY_SIZE] = { 1 }; /* disallow space 0 */
+static unsigned long dirty_space_id[SID_ARRAY_SIZE];
+static unsigned long space_id_index;
+static unsigned long free_space_ids = NR_SPACE_IDS - 1;
+static unsigned long dirty_space_ids = 0;
+
+static DEFINE_SPINLOCK(sid_lock);
+
+unsigned long alloc_sid(void)
+{
+	unsigned long index;
+
+	spin_lock(&sid_lock);
+
+	if (free_space_ids == 0) {
+		if (dirty_space_ids != 0) {
+			spin_unlock(&sid_lock);
+			flush_tlb_all(); /* flush_tlb_all() calls recycle_sids() */
+			spin_lock(&sid_lock);
+		}
+		if (free_space_ids == 0)
+			BUG();
+	}
+
+	free_space_ids--;
+
+	index = find_next_zero_bit(space_id, NR_SPACE_IDS, space_id_index);
+	space_id[index >> SHIFT_PER_LONG] |= (1L << (index & (BITS_PER_LONG - 1)));
+	space_id_index = index;
+
+	spin_unlock(&sid_lock);
+
+	return index << SPACEID_SHIFT;
+}
+
+void free_sid(unsigned long spaceid)
+{
+	unsigned long index = spaceid >> SPACEID_SHIFT;
+	unsigned long *dirty_space_offset;
+
+	dirty_space_offset = dirty_space_id + (index >> SHIFT_PER_LONG);
+	index &= (BITS_PER_LONG - 1);
+
+	spin_lock(&sid_lock);
+
+	if (*dirty_space_offset & (1L << index))
+	    BUG(); /* attempt to free space id twice */
+
+	*dirty_space_offset |= (1L << index);
+	dirty_space_ids++;
+
+	spin_unlock(&sid_lock);
+}
+
+
+#ifdef CONFIG_SMP
+static void get_dirty_sids(unsigned long *ndirtyptr,unsigned long *dirty_array)
+{
+	int i;
+
+	/* NOTE: sid_lock must be held upon entry */
+
+	*ndirtyptr = dirty_space_ids;
+	if (dirty_space_ids != 0) {
+	    for (i = 0; i < SID_ARRAY_SIZE; i++) {
+		dirty_array[i] = dirty_space_id[i];
+		dirty_space_id[i] = 0;
+	    }
+	    dirty_space_ids = 0;
+	}
+
+	return;
+}
+
+static void recycle_sids(unsigned long ndirty,unsigned long *dirty_array)
+{
+	int i;
+
+	/* NOTE: sid_lock must be held upon entry */
+
+	if (ndirty != 0) {
+		for (i = 0; i < SID_ARRAY_SIZE; i++) {
+			space_id[i] ^= dirty_array[i];
+		}
+
+		free_space_ids += ndirty;
+		space_id_index = 0;
+	}
+}
+
+#else /* CONFIG_SMP */
+
+static void recycle_sids(void)
+{
+	int i;
+
+	/* NOTE: sid_lock must be held upon entry */
+
+	if (dirty_space_ids != 0) {
+		for (i = 0; i < SID_ARRAY_SIZE; i++) {
+			space_id[i] ^= dirty_space_id[i];
+			dirty_space_id[i] = 0;
+		}
+
+		free_space_ids += dirty_space_ids;
+		dirty_space_ids = 0;
+		space_id_index = 0;
+	}
+}
+#endif
+
+/*
+ * flush_tlb_all() calls recycle_sids(), since whenever the entire tlb is
+ * purged, we can safely reuse the space ids that were released but
+ * not flushed from the tlb.
+ */
+
+#ifdef CONFIG_SMP
+
+static unsigned long recycle_ndirty;
+static unsigned long recycle_dirty_array[SID_ARRAY_SIZE];
+static unsigned int recycle_inuse = 0;
+
+void flush_tlb_all(void)
+{
+	int do_recycle;
+
+	do_recycle = 0;
+	spin_lock(&sid_lock);
+	if (dirty_space_ids > RECYCLE_THRESHOLD) {
+	    if (recycle_inuse) {
+		BUG();  /* FIXME: Use a semaphore/wait queue here */
+	    }
+	    get_dirty_sids(&recycle_ndirty,recycle_dirty_array);
+	    recycle_inuse++;
+	    do_recycle++;
+	}
+	spin_unlock(&sid_lock);
+	on_each_cpu((void (*)(void *))flush_tlb_all_local, NULL, 1, 1);
+	if (do_recycle) {
+	    spin_lock(&sid_lock);
+	    recycle_sids(recycle_ndirty,recycle_dirty_array);
+	    recycle_inuse = 0;
+	    spin_unlock(&sid_lock);
+	}
+}
+#else
+void flush_tlb_all(void)
+{
+	spin_lock(&sid_lock);
+	flush_tlb_all_local();
+	recycle_sids();
+	spin_unlock(&sid_lock);
+}
+#endif
+
+#ifdef CONFIG_BLK_DEV_INITRD
+void free_initrd_mem(unsigned long start, unsigned long end)
+{
+#if 0
+	if (start < end)
+		printk(KERN_INFO "Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
+	for (; start < end; start += PAGE_SIZE) {
+		ClearPageReserved(virt_to_page(start));
+		set_page_count(virt_to_page(start), 1);
+		free_page(start);
+		num_physpages++;
+		totalram_pages++;
+	}
+#endif
+}
+#endif
diff --git a/arch/parisc/mm/ioremap.c b/arch/parisc/mm/ioremap.c
new file mode 100644
index 000000000000..f2df502cdae3
--- /dev/null
+++ b/arch/parisc/mm/ioremap.c
@@ -0,0 +1,207 @@
+/*
+ * arch/parisc/mm/ioremap.c
+ *
+ * Re-map IO memory to kernel address space so that we can access it.
+ * This is needed for high PCI addresses that aren't mapped in the
+ * 640k-1MB IO memory area on PC's
+ *
+ * (C) Copyright 1995 1996 Linus Torvalds
+ * (C) Copyright 2001 Helge Deller <deller@gmx.de>
+ */
+
+#include <linux/vmalloc.h>
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <asm/io.h>
+#include <asm/pgalloc.h>
+
+static inline void remap_area_pte(pte_t * pte, unsigned long address, unsigned long size,
+	unsigned long phys_addr, unsigned long flags)
+{
+	unsigned long end;
+
+	address &= ~PMD_MASK;
+	end = address + size;
+	if (end > PMD_SIZE)
+		end = PMD_SIZE;
+	if (address >= end)
+		BUG();
+	do {
+		if (!pte_none(*pte)) {
+			printk(KERN_ERR "remap_area_pte: page already exists\n");
+			BUG();
+		}
+		set_pte(pte, mk_pte_phys(phys_addr, __pgprot(_PAGE_PRESENT | _PAGE_RW | 
+					_PAGE_DIRTY | _PAGE_ACCESSED | flags)));
+		address += PAGE_SIZE;
+		phys_addr += PAGE_SIZE;
+		pte++;
+	} while (address && (address < end));
+}
+
+static inline int remap_area_pmd(pmd_t * pmd, unsigned long address, unsigned long size,
+	unsigned long phys_addr, unsigned long flags)
+{
+	unsigned long end;
+
+	address &= ~PGDIR_MASK;
+	end = address + size;
+	if (end > PGDIR_SIZE)
+		end = PGDIR_SIZE;
+	phys_addr -= address;
+	if (address >= end)
+		BUG();
+	do {
+		pte_t * pte = pte_alloc_kernel(NULL, pmd, address);
+		if (!pte)
+			return -ENOMEM;
+		remap_area_pte(pte, address, end - address, address + phys_addr, flags);
+		address = (address + PMD_SIZE) & PMD_MASK;
+		pmd++;
+	} while (address && (address < end));
+	return 0;
+}
+
+#if (USE_HPPA_IOREMAP)
+static int remap_area_pages(unsigned long address, unsigned long phys_addr,
+				 unsigned long size, unsigned long flags)
+{
+	int error;
+	pgd_t * dir;
+	unsigned long end = address + size;
+
+	phys_addr -= address;
+	dir = pgd_offset(&init_mm, address);
+	flush_cache_all();
+	if (address >= end)
+		BUG();
+	spin_lock(&init_mm.page_table_lock);
+	do {
+		pmd_t *pmd;
+		pmd = pmd_alloc(dir, address);
+		error = -ENOMEM;
+		if (!pmd)
+			break;
+		if (remap_area_pmd(pmd, address, end - address,
+					 phys_addr + address, flags))
+			break;
+		error = 0;
+		address = (address + PGDIR_SIZE) & PGDIR_MASK;
+		dir++;
+	} while (address && (address < end));
+	spin_unlock(&init_mm.page_table_lock);
+	flush_tlb_all();
+	return error;
+}
+#endif /* USE_HPPA_IOREMAP */
+
+#ifdef CONFIG_DEBUG_IOREMAP
+static unsigned long last = 0;
+
+void gsc_bad_addr(unsigned long addr)
+{
+	if (time_after(jiffies, last + HZ*10)) {
+		printk("gsc_foo() called with bad address 0x%lx\n", addr);
+		dump_stack();
+		last = jiffies;
+	}
+}
+EXPORT_SYMBOL(gsc_bad_addr);
+
+void __raw_bad_addr(const volatile void __iomem *addr)
+{
+	if (time_after(jiffies, last + HZ*10)) {
+		printk("__raw_foo() called with bad address 0x%p\n", addr);
+		dump_stack();
+		last = jiffies;
+	}
+}
+EXPORT_SYMBOL(__raw_bad_addr);
+#endif
+
+/*
+ * Generic mapping function (not visible outside):
+ */
+
+/*
+ * Remap an arbitrary physical address space into the kernel virtual
+ * address space. Needed when the kernel wants to access high addresses
+ * directly.
+ *
+ * NOTE! We need to allow non-page-aligned mappings too: we will obviously
+ * have to convert them into an offset in a page-aligned mapping, but the
+ * caller shouldn't need to know that small detail.
+ */
+void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags)
+{
+#if !(USE_HPPA_IOREMAP)
+
+	unsigned long end = phys_addr + size - 1;
+	/* Support EISA addresses */
+	if ((phys_addr >= 0x00080000 && end < 0x000fffff)
+			|| (phys_addr >= 0x00500000 && end < 0x03bfffff)) {
+		phys_addr |= 0xfc000000;
+	}
+
+#ifdef CONFIG_DEBUG_IOREMAP
+	return (void __iomem *)(phys_addr - (0x1UL << NYBBLE_SHIFT));
+#else
+	return (void __iomem *)phys_addr;
+#endif
+
+#else
+	void * addr;
+	struct vm_struct * area;
+	unsigned long offset, last_addr;
+
+	/* Don't allow wraparound or zero size */
+	last_addr = phys_addr + size - 1;
+	if (!size || last_addr < phys_addr)
+		return NULL;
+
+	/*
+	 * Don't allow anybody to remap normal RAM that we're using..
+	 */
+	if (phys_addr < virt_to_phys(high_memory)) {
+		char *t_addr, *t_end;
+		struct page *page;
+
+		t_addr = __va(phys_addr);
+		t_end = t_addr + (size - 1);
+	   
+		for(page = virt_to_page(t_addr); page <= virt_to_page(t_end); page++)
+			if(!PageReserved(page))
+				return NULL;
+	}
+
+	/*
+	 * Mappings have to be page-aligned
+	 */
+	offset = phys_addr & ~PAGE_MASK;
+	phys_addr &= PAGE_MASK;
+	size = PAGE_ALIGN(last_addr) - phys_addr;
+
+	/*
+	 * Ok, go for it..
+	 */
+	area = get_vm_area(size, VM_IOREMAP);
+	if (!area)
+		return NULL;
+	addr = area->addr;
+	if (remap_area_pages((unsigned long) addr, phys_addr, size, flags)) {
+		vfree(addr);
+		return NULL;
+	}
+	return (void __iomem *) (offset + (char *)addr);
+#endif
+}
+
+void iounmap(void __iomem *addr)
+{
+#if !(USE_HPPA_IOREMAP)
+	return;
+#else
+	if (addr > high_memory)
+		return vfree((void *) (PAGE_MASK & (unsigned long __force) addr));
+#endif
+}
diff --git a/arch/parisc/mm/kmap.c b/arch/parisc/mm/kmap.c
new file mode 100644
index 000000000000..1b1acd5e2f6e
--- /dev/null
+++ b/arch/parisc/mm/kmap.c
@@ -0,0 +1,166 @@
+/* 
+ *    kmap/page table map and unmap support routines
+ *
+ *    Copyright 1999,2000 Hewlett-Packard Company
+ *    Copyright 2000 John Marvin <jsm at hp.com>
+ *    Copyright 2000 Grant Grundler <grundler at parisc-linux.org>
+ *    Copyright 2000 Philipp Rumpf <prumpf@tux.org>
+ *
+ *
+ *    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.
+ *
+ *    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.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program; if not, write to the Free Software
+ *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+/*
+** Stolen mostly from arch/parisc/kernel/pci-dma.c
+*/
+
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/pci.h>
+
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+
+#include <asm/uaccess.h>
+#include <asm/pgalloc.h>
+
+#include <asm/io.h>
+#include <asm/page.h>		/* get_order */
+
+#undef flush_cache_all
+#define flush_cache_all flush_all_caches
+
+typedef void (*pte_iterator_t) (pte_t * pte, unsigned long arg);
+
+#if 0
+/* XXX This routine could be used with iterate_page() to replace
+ * unmap_uncached_page() and save a little code space but I didn't
+ * do that since I'm not certain whether this is the right path. -PB
+ */
+static void unmap_cached_pte(pte_t * pte, unsigned long addr, unsigned long arg)
+{
+	pte_t page = *pte;
+	pte_clear(&init_mm, addr, pte);
+	if (!pte_none(page)) {
+		if (pte_present(page)) {
+			unsigned long map_nr = pte_pagenr(page);
+			if (map_nr < max_mapnr)
+				__free_page(mem_map + map_nr);
+		} else {
+			printk(KERN_CRIT
+			       "Whee.. Swapped out page in kernel page table\n");
+		}
+	}
+}
+#endif
+
+/* These two routines should probably check a few things... */
+static void set_uncached(pte_t * pte, unsigned long arg)
+{
+	pte_val(*pte) |= _PAGE_NO_CACHE;
+}
+
+static void set_cached(pte_t * pte, unsigned long arg)
+{
+	pte_val(*pte) &= ~_PAGE_NO_CACHE;
+}
+
+static inline void iterate_pte(pmd_t * pmd, unsigned long address,
+			       unsigned long size, pte_iterator_t op,
+			       unsigned long arg)
+{
+	pte_t *pte;
+	unsigned long end;
+
+	if (pmd_none(*pmd))
+		return;
+	if (pmd_bad(*pmd)) {
+		pmd_ERROR(*pmd);
+		pmd_clear(pmd);
+		return;
+	}
+	pte = pte_offset(pmd, address);
+	address &= ~PMD_MASK;
+	end = address + size;
+	if (end > PMD_SIZE)
+		end = PMD_SIZE;
+	do {
+		op(pte, arg);
+		address += PAGE_SIZE;
+		pte++;
+	} while (address < end);
+}
+
+static inline void iterate_pmd(pgd_t * dir, unsigned long address,
+			       unsigned long size, pte_iterator_t op,
+			       unsigned long arg)
+{
+	pmd_t *pmd;
+	unsigned long end;
+
+	if (pgd_none(*dir))
+		return;
+	if (pgd_bad(*dir)) {
+		pgd_ERROR(*dir);
+		pgd_clear(dir);
+		return;
+	}
+	pmd = pmd_offset(dir, address);
+	address &= ~PGDIR_MASK;
+	end = address + size;
+	if (end > PGDIR_SIZE)
+		end = PGDIR_SIZE;
+	do {
+		iterate_pte(pmd, address, end - address, op, arg);
+		address = (address + PMD_SIZE) & PMD_MASK;
+		pmd++;
+	} while (address < end);
+}
+
+static void iterate_pages(unsigned long address, unsigned long size,
+			  pte_iterator_t op, unsigned long arg)
+{
+	pgd_t *dir;
+	unsigned long end = address + size;
+
+	dir = pgd_offset_k(address);
+	flush_cache_all();
+	do {
+		iterate_pmd(dir, address, end - address, op, arg);
+		address = (address + PGDIR_SIZE) & PGDIR_MASK;
+		dir++;
+	} while (address && (address < end));
+	flush_tlb_all();
+}
+
+void
+kernel_set_cachemode(unsigned long vaddr, unsigned long size, int what)
+{
+	switch (what) {
+	case IOMAP_FULL_CACHING:
+		iterate_pages(vaddr, size, set_cached, 0);
+		flush_tlb_range(NULL, vaddr, size);
+		break;
+	case IOMAP_NOCACHE_SER:
+		iterate_pages(vaddr, size, set_uncached, 0);
+		flush_tlb_range(NULL, vaddr, size);
+		break;
+	default:
+		printk(KERN_CRIT
+		       "kernel_set_cachemode mode %d not understood\n",
+		       what);
+		break;
+	}
+}