Linux-2.6.12-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!

1 files changed, 299 insertions, 0 deletions

diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c
new file mode 100644
index 000000000000..6daf15ac8940
--- /dev/null
+++ b/arch/ia64/mm/contig.c
@@ -0,0 +1,299 @@
+/*
+ * 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) 1998-2003 Hewlett-Packard Co
+ *      David Mosberger-Tang <davidm@hpl.hp.com>
+ *      Stephane Eranian <eranian@hpl.hp.com>
+ * Copyright (C) 2000, Rohit Seth <rohit.seth@intel.com>
+ * Copyright (C) 1999 VA Linux Systems
+ * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
+ * Copyright (C) 2003 Silicon Graphics, Inc. All rights reserved.
+ *
+ * Routines used by ia64 machines with contiguous (or virtually contiguous)
+ * memory.
+ */
+#include <linux/config.h>
+#include <linux/bootmem.h>
+#include <linux/efi.h>
+#include <linux/mm.h>
+#include <linux/swap.h>
+
+#include <asm/meminit.h>
+#include <asm/pgalloc.h>
+#include <asm/pgtable.h>
+#include <asm/sections.h>
+#include <asm/mca.h>
+
+#ifdef CONFIG_VIRTUAL_MEM_MAP
+static unsigned long num_dma_physpages;
+#endif
+
+/**
+ * show_mem - display a memory statistics summary
+ *
+ * Just walks the pages in the system and describes where they're allocated.
+ */
+void
+show_mem (void)
+{
+        int i, total = 0, reserved = 0;
+        int shared = 0, cached = 0;
+
+        printk("Mem-info:\n");
+        show_free_areas();
+
+        printk("Free swap:       %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
+        i = max_mapnr;
+        while (i-- > 0) {
+                if (!pfn_valid(i))
+                        continue;
+                total++;
+                if (PageReserved(mem_map+i))
+                        reserved++;
+                else if (PageSwapCache(mem_map+i))
+                        cached++;
+                else if (page_count(mem_map + i))
+                        shared += page_count(mem_map + i) - 1;
+        }
+        printk("%d pages of RAM\n", total);
+        printk("%d reserved pages\n", reserved);
+        printk("%d pages shared\n", shared);
+        printk("%d pages swap cached\n", cached);
+        printk("%ld pages in page table cache\n", pgtable_cache_size);
+}
+
+/* physical address where the bootmem map is located */
+unsigned long bootmap_start;
+
+/**
+ * find_max_pfn - adjust the maximum page number callback
+ * @start: start of range
+ * @end: end of range
+ * @arg: address of pointer to global max_pfn variable
+ *
+ * Passed as a callback function to efi_memmap_walk() to determine the highest
+ * available page frame number in the system.
+ */
+int
+find_max_pfn (unsigned long start, unsigned long end, void *arg)
+{
+        unsigned long *max_pfnp = arg, pfn;
+
+        pfn = (PAGE_ALIGN(end - 1) - PAGE_OFFSET) >> PAGE_SHIFT;
+        if (pfn > *max_pfnp)
+                *max_pfnp = pfn;
+        return 0;
+}
+
+/**
+ * find_bootmap_location - callback to find a memory area for the bootmap
+ * @start: start of region
+ * @end: end of region
+ * @arg: unused callback data
+ *
+ * Find a place to put the bootmap and return its starting address in
+ * bootmap_start.  This address must be page-aligned.
+ */
+int
+find_bootmap_location (unsigned long start, unsigned long end, void *arg)
+{
+        unsigned long needed = *(unsigned long *)arg;
+        unsigned long range_start, range_end, free_start;
+        int i;
+
+#if IGNORE_PFN0
+        if (start == PAGE_OFFSET) {
+                start += PAGE_SIZE;
+                if (start >= end)
+                        return 0;
+        }
+#endif
+
+        free_start = PAGE_OFFSET;
+
+        for (i = 0; i < num_rsvd_regions; i++) {
+                range_start = max(start, free_start);
+                range_end   = min(end, rsvd_region[i].start & PAGE_MASK);
+
+                free_start = PAGE_ALIGN(rsvd_region[i].end);
+
+                if (range_end <= range_start)
+                        continue; /* skip over empty range */
+
+                if (range_end - range_start >= needed) {
+                        bootmap_start = __pa(range_start);
+                        return -1;      /* done */
+                }
+
+                /* nothing more available in this segment */
+                if (range_end == end)
+                        return 0;
+        }
+        return 0;
+}
+
+/**
+ * find_memory - setup memory map
+ *
+ * Walk the EFI memory map and find usable memory for the system, taking
+ * into account reserved areas.
+ */
+void
+find_memory (void)
+{
+        unsigned long bootmap_size;
+
+        reserve_memory();
+
+        /* first find highest page frame number */
+        max_pfn = 0;
+        efi_memmap_walk(find_max_pfn, &max_pfn);
+
+        /* how many bytes to cover all the pages */
+        bootmap_size = bootmem_bootmap_pages(max_pfn) << PAGE_SHIFT;
+
+        /* look for a location to hold the bootmap */
+        bootmap_start = ~0UL;
+        efi_memmap_walk(find_bootmap_location, &bootmap_size);
+        if (bootmap_start == ~0UL)
+                panic("Cannot find %ld bytes for bootmap\n", bootmap_size);
+
+        bootmap_size = init_bootmem(bootmap_start >> PAGE_SHIFT, max_pfn);
+
+        /* Free all available memory, then mark bootmem-map as being in use. */
+        efi_memmap_walk(filter_rsvd_memory, free_bootmem);
+        reserve_bootmem(bootmap_start, bootmap_size);
+
+        find_initrd();
+}
+
+#ifdef CONFIG_SMP
+/**
+ * per_cpu_init - setup per-cpu variables
+ *
+ * Allocate and setup per-cpu data areas.
+ */
+void *
+per_cpu_init (void)
+{
+        void *cpu_data;
+        int cpu;
+
+        /*
+         * get_free_pages() cannot be used before cpu_init() done.  BSP
+         * allocates "NR_CPUS" pages for all CPUs to avoid that AP calls
+         * get_zeroed_page().
+         */
+        if (smp_processor_id() == 0) {
+                cpu_data = __alloc_bootmem(PERCPU_PAGE_SIZE * NR_CPUS,
+                                           PERCPU_PAGE_SIZE, __pa(MAX_DMA_ADDRESS));
+                for (cpu = 0; cpu < NR_CPUS; cpu++) {
+                        memcpy(cpu_data, __phys_per_cpu_start, __per_cpu_end - __per_cpu_start);
+                        __per_cpu_offset[cpu] = (char *) cpu_data - __per_cpu_start;
+                        cpu_data += PERCPU_PAGE_SIZE;
+                        per_cpu(local_per_cpu_offset, cpu) = __per_cpu_offset[cpu];
+                }
+        }
+        return __per_cpu_start + __per_cpu_offset[smp_processor_id()];
+}
+#endif /* CONFIG_SMP */
+
+static int
+count_pages (u64 start, u64 end, void *arg)
+{
+        unsigned long *count = arg;
+
+        *count += (end - start) >> PAGE_SHIFT;
+        return 0;
+}
+
+#ifdef CONFIG_VIRTUAL_MEM_MAP
+static int
+count_dma_pages (u64 start, u64 end, void *arg)
+{
+        unsigned long *count = arg;
+
+        if (start < MAX_DMA_ADDRESS)
+                *count += (min(end, MAX_DMA_ADDRESS) - start) >> PAGE_SHIFT;
+        return 0;
+}
+#endif
+
+/*
+ * Set up the page tables.
+ */
+
+void
+paging_init (void)
+{
+        unsigned long max_dma;
+        unsigned long zones_size[MAX_NR_ZONES];
+#ifdef CONFIG_VIRTUAL_MEM_MAP
+        unsigned long zholes_size[MAX_NR_ZONES];
+        unsigned long max_gap;
+#endif
+
+        /* initialize mem_map[] */
+
+        memset(zones_size, 0, sizeof(zones_size));
+
+        num_physpages = 0;
+        efi_memmap_walk(count_pages, &num_physpages);
+
+        max_dma = virt_to_phys((void *) MAX_DMA_ADDRESS) >> PAGE_SHIFT;
+
+#ifdef CONFIG_VIRTUAL_MEM_MAP
+        memset(zholes_size, 0, sizeof(zholes_size));
+
+        num_dma_physpages = 0;
+        efi_memmap_walk(count_dma_pages, &num_dma_physpages);
+
+        if (max_low_pfn < max_dma) {
+                zones_size[ZONE_DMA] = max_low_pfn;
+                zholes_size[ZONE_DMA] = max_low_pfn - num_dma_physpages;
+        } else {
+                zones_size[ZONE_DMA] = max_dma;
+                zholes_size[ZONE_DMA] = max_dma - num_dma_physpages;
+                if (num_physpages > num_dma_physpages) {
+                        zones_size[ZONE_NORMAL] = max_low_pfn - max_dma;
+                        zholes_size[ZONE_NORMAL] =
+                                ((max_low_pfn - max_dma) -
+                                 (num_physpages - num_dma_physpages));
+                }
+        }
+
+        max_gap = 0;
+        efi_memmap_walk(find_largest_hole, (u64 *)&max_gap);
+        if (max_gap < LARGE_GAP) {
+                vmem_map = (struct page *) 0;
+                free_area_init_node(0, &contig_page_data, zones_size, 0,
+                                    zholes_size);
+        } else {
+                unsigned long map_size;
+
+                /* allocate virtual_mem_map */
+
+                map_size = PAGE_ALIGN(max_low_pfn * sizeof(struct page));
+                vmalloc_end -= map_size;
+                vmem_map = (struct page *) vmalloc_end;
+                efi_memmap_walk(create_mem_map_page_table, NULL);
+
+                NODE_DATA(0)->node_mem_map = vmem_map;
+                free_area_init_node(0, &contig_page_data, zones_size,
+                                    0, zholes_size);
+
+                printk("Virtual mem_map starts at 0x%p\n", mem_map);
+        }
+#else /* !CONFIG_VIRTUAL_MEM_MAP */
+        if (max_low_pfn < max_dma)
+                zones_size[ZONE_DMA] = max_low_pfn;
+        else {
+                zones_size[ZONE_DMA] = max_dma;
+                zones_size[ZONE_NORMAL] = max_low_pfn - max_dma;
+        }
+        free_area_init(zones_size);
+#endif /* !CONFIG_VIRTUAL_MEM_MAP */
+        zero_page_memmap_ptr = virt_to_page(ia64_imva(empty_zero_page));
+}