#include <linux/mm.h>
#include <linux/module.h>
#include <linux/list.h>
+#include <linux/hugetlb.h>
+#include <linux/slab.h>
#include <asm/pgalloc.h>
#include <asm/pgtable.h>
#include <asm/setup.h>
#include <asm/tlbflush.h>
+#include <asm/sections.h>
static DEFINE_MUTEX(vmem_mutex);
static LIST_HEAD(mem_segs);
-void __meminit memmap_init(unsigned long size, int nid, unsigned long zone,
- unsigned long start_pfn)
-{
- struct page *start, *end;
- struct page *map_start, *map_end;
- int i;
-
- start = pfn_to_page(start_pfn);
- end = start + size;
-
- for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
- unsigned long cstart, cend;
-
- cstart = PFN_DOWN(memory_chunk[i].addr);
- cend = cstart + PFN_DOWN(memory_chunk[i].size);
-
- map_start = mem_map + cstart;
- map_end = mem_map + cend;
-
- if (map_start < start)
- map_start = start;
- if (map_end > end)
- map_end = end;
-
- map_start -= ((unsigned long) map_start & (PAGE_SIZE - 1))
- / sizeof(struct page);
- map_end += ((PFN_ALIGN((unsigned long) map_end)
- - (unsigned long) map_end)
- / sizeof(struct page));
-
- if (map_start < map_end)
- memmap_init_zone((unsigned long)(map_end - map_start),
- nid, zone, page_to_pfn(map_start),
- MEMMAP_EARLY);
- }
-}
-
-static void __init_refok *vmem_alloc_pages(unsigned int order)
+static void __ref *vmem_alloc_pages(unsigned int order)
{
if (slab_is_available())
return (void *)__get_free_pages(GFP_KERNEL, order);
return alloc_bootmem_pages((1 << order) * PAGE_SIZE);
}
-#define vmem_pud_alloc() ({ BUG(); ((pud_t *) NULL); })
+static inline pud_t *vmem_pud_alloc(void)
+{
+ pud_t *pud = NULL;
+
+#ifdef CONFIG_64BIT
+ pud = vmem_alloc_pages(2);
+ if (!pud)
+ return NULL;
+ clear_table((unsigned long *) pud, _REGION3_ENTRY_EMPTY, PAGE_SIZE * 4);
+#endif
+ return pud;
+}
static inline pmd_t *vmem_pmd_alloc(void)
{
pmd = vmem_alloc_pages(2);
if (!pmd)
return NULL;
- clear_table((unsigned long *) pmd, _SEGMENT_ENTRY_EMPTY, PAGE_SIZE*4);
+ clear_table((unsigned long *) pmd, _SEGMENT_ENTRY_EMPTY, PAGE_SIZE * 4);
#endif
return pmd;
}
-static inline pte_t *vmem_pte_alloc(void)
+static pte_t __ref *vmem_pte_alloc(void)
{
- pte_t *pte = vmem_alloc_pages(0);
+ pte_t *pte;
+ if (slab_is_available())
+ pte = (pte_t *) page_table_alloc(&init_mm);
+ else
+ pte = alloc_bootmem(PTRS_PER_PTE * sizeof(pte_t));
if (!pte)
return NULL;
- clear_table((unsigned long *) pte, _PAGE_TYPE_EMPTY, PAGE_SIZE);
+ if (MACHINE_HAS_HPAGE)
+ clear_table((unsigned long *) pte, _PAGE_TYPE_EMPTY | _PAGE_CO,
+ PTRS_PER_PTE * sizeof(pte_t));
+ else
+ clear_table((unsigned long *) pte, _PAGE_TYPE_EMPTY,
+ PTRS_PER_PTE * sizeof(pte_t));
return pte;
}
/*
* Add a physical memory range to the 1:1 mapping.
*/
-static int vmem_add_range(unsigned long start, unsigned long size)
+static int vmem_add_mem(unsigned long start, unsigned long size, int ro)
{
unsigned long address;
pgd_t *pg_dir;
pud_populate_kernel(&init_mm, pu_dir, pm_dir);
}
+ pte = mk_pte_phys(address, __pgprot(ro ? _PAGE_RO : 0));
pm_dir = pmd_offset(pu_dir, address);
+
+#ifdef __s390x__
+ if (MACHINE_HAS_HPAGE && !(address & ~HPAGE_MASK) &&
+ (address + HPAGE_SIZE <= start + size) &&
+ (address >= HPAGE_SIZE)) {
+ pte_val(pte) |= _SEGMENT_ENTRY_LARGE |
+ _SEGMENT_ENTRY_CO;
+ pmd_val(*pm_dir) = pte_val(pte);
+ address += HPAGE_SIZE - PAGE_SIZE;
+ continue;
+ }
+#endif
if (pmd_none(*pm_dir)) {
pt_dir = vmem_pte_alloc();
if (!pt_dir)
}
pt_dir = pte_offset_kernel(pm_dir, address);
- pte = pfn_pte(address >> PAGE_SHIFT, PAGE_KERNEL);
*pt_dir = pte;
}
ret = 0;
pm_dir = pmd_offset(pu_dir, address);
if (pmd_none(*pm_dir))
continue;
+
+ if (pmd_huge(*pm_dir)) {
+ pmd_clear_kernel(pm_dir);
+ address += HPAGE_SIZE - PAGE_SIZE;
+ continue;
+ }
+
pt_dir = pte_offset_kernel(pm_dir, address);
*pt_dir = pte;
}
/*
* Add a backed mem_map array to the virtual mem_map array.
*/
-static int vmem_add_mem_map(unsigned long start, unsigned long size)
+int __meminit vmemmap_populate(struct page *start, unsigned long nr, int node)
{
unsigned long address, start_addr, end_addr;
- struct page *map_start, *map_end;
pgd_t *pg_dir;
pud_t *pu_dir;
pmd_t *pm_dir;
pte_t pte;
int ret = -ENOMEM;
- map_start = VMEM_MAP + PFN_DOWN(start);
- map_end = VMEM_MAP + PFN_DOWN(start + size);
-
- start_addr = (unsigned long) map_start & PAGE_MASK;
- end_addr = PFN_ALIGN((unsigned long) map_end);
+ start_addr = (unsigned long) start;
+ end_addr = (unsigned long) (start + nr);
for (address = start_addr; address < end_addr; address += PAGE_SIZE) {
pg_dir = pgd_offset_k(address);
*pt_dir = pte;
}
}
+ memset(start, 0, nr * sizeof(struct page));
ret = 0;
out:
flush_tlb_kernel_range(start_addr, end_addr);
return ret;
}
-static int vmem_add_mem(unsigned long start, unsigned long size)
-{
- int ret;
-
- ret = vmem_add_range(start, size);
- if (ret)
- return ret;
- return vmem_add_mem_map(start, size);
-}
-
/*
* Add memory segment to the segment list if it doesn't overlap with
* an already present segment.
{
struct memory_segment *tmp;
- if (seg->start + seg->size >= VMALLOC_START ||
+ if (seg->start + seg->size > VMEM_MAX_PHYS ||
seg->start + seg->size < seg->start)
return -ERANGE;
vmem_remove_range(seg->start, seg->size);
}
-int remove_shared_memory(unsigned long start, unsigned long size)
+int vmem_remove_mapping(unsigned long start, unsigned long size)
{
struct memory_segment *seg;
int ret;
return ret;
}
-int add_shared_memory(unsigned long start, unsigned long size)
+int vmem_add_mapping(unsigned long start, unsigned long size)
{
struct memory_segment *seg;
- struct page *page;
- unsigned long pfn, num_pfn, end_pfn;
int ret;
mutex_lock(&vmem_mutex);
if (ret)
goto out_free;
- ret = vmem_add_mem(start, size);
+ ret = vmem_add_mem(start, size, 0);
if (ret)
goto out_remove;
-
- pfn = PFN_DOWN(start);
- num_pfn = PFN_DOWN(size);
- end_pfn = pfn + num_pfn;
-
- page = pfn_to_page(pfn);
- memset(page, 0, num_pfn * sizeof(struct page));
-
- for (; pfn < end_pfn; pfn++) {
- page = pfn_to_page(pfn);
- init_page_count(page);
- reset_page_mapcount(page);
- SetPageReserved(page);
- INIT_LIST_HEAD(&page->lru);
- }
goto out;
out_remove:
*/
void __init vmem_map_init(void)
{
+ unsigned long ro_start, ro_end;
+ unsigned long start, end;
int i;
- BUILD_BUG_ON((unsigned long)VMEM_MAP + VMEM_MAP_SIZE > VMEM_MAP_MAX);
- NODE_DATA(0)->node_mem_map = VMEM_MAP;
- for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++)
- vmem_add_mem(memory_chunk[i].addr, memory_chunk[i].size);
+ spin_lock_init(&init_mm.context.list_lock);
+ INIT_LIST_HEAD(&init_mm.context.crst_list);
+ INIT_LIST_HEAD(&init_mm.context.pgtable_list);
+ init_mm.context.noexec = 0;
+ ro_start = ((unsigned long)&_stext) & PAGE_MASK;
+ ro_end = PFN_ALIGN((unsigned long)&_eshared);
+ for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
+ start = memory_chunk[i].addr;
+ end = memory_chunk[i].addr + memory_chunk[i].size;
+ if (start >= ro_end || end <= ro_start)
+ vmem_add_mem(start, end - start, 0);
+ else if (start >= ro_start && end <= ro_end)
+ vmem_add_mem(start, end - start, 1);
+ else if (start >= ro_start) {
+ vmem_add_mem(start, ro_end - start, 1);
+ vmem_add_mem(ro_end, end - ro_end, 0);
+ } else if (end < ro_end) {
+ vmem_add_mem(start, ro_start - start, 0);
+ vmem_add_mem(ro_start, end - ro_start, 1);
+ } else {
+ vmem_add_mem(start, ro_start - start, 0);
+ vmem_add_mem(ro_start, ro_end - ro_start, 1);
+ vmem_add_mem(ro_end, end - ro_end, 0);
+ }
+ }
}
/*
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff