#include <linux/bootmem.h>
#include <linux/proc_fs.h>
#include <linux/pci.h>
+#include <linux/pfn.h>
#include <linux/poison.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/memory_hotplug.h>
+#include <linux/nmi.h>
#include <asm/processor.h>
#include <asm/system.h>
#define Dprintk(x...)
#endif
-struct dma_mapping_ops* dma_ops;
+const struct dma_mapping_ops* dma_ops;
EXPORT_SYMBOL(dma_ops);
static unsigned long dma_reserve __initdata;
for_each_online_pgdat(pgdat) {
for (i = 0; i < pgdat->node_spanned_pages; ++i) {
+ /* this loop can take a while with 256 GB and 4k pages
+ so update the NMI watchdog */
+ if (unlikely(i % MAX_ORDER_NR_PAGES == 0)) {
+ touch_nmi_watchdog();
+ }
+ if (!pfn_valid(pgdat->node_start_pfn + i))
+ continue;
page = pfn_to_page(pgdat->node_start_pfn + i);
total++;
if (PageReserved(page))
set_pte_phys(address, phys, prot);
}
-unsigned long __initdata table_start, table_end;
+unsigned long __meminitdata table_start, table_end;
-extern pmd_t temp_boot_pmds[];
-
-static struct temp_map {
- pmd_t *pmd;
- void *address;
- int allocated;
-} temp_mappings[] __initdata = {
- { &temp_boot_pmds[0], (void *)(40UL * 1024 * 1024) },
- { &temp_boot_pmds[1], (void *)(42UL * 1024 * 1024) },
- {}
-};
-
-static __meminit void *alloc_low_page(int *index, unsigned long *phys)
+static __meminit void *alloc_low_page(unsigned long *phys)
{
- struct temp_map *ti;
- int i;
- unsigned long pfn = table_end++, paddr;
+ unsigned long pfn = table_end++;
void *adr;
if (after_bootmem) {
if (pfn >= end_pfn)
panic("alloc_low_page: ran out of memory");
- for (i = 0; temp_mappings[i].allocated; i++) {
- if (!temp_mappings[i].pmd)
- panic("alloc_low_page: ran out of temp mappings");
- }
- ti = &temp_mappings[i];
- paddr = (pfn << PAGE_SHIFT) & PMD_MASK;
- set_pmd(ti->pmd, __pmd(paddr | _KERNPG_TABLE | _PAGE_PSE));
- ti->allocated = 1;
- __flush_tlb();
- adr = ti->address + ((pfn << PAGE_SHIFT) & ~PMD_MASK);
+
+ adr = early_ioremap(pfn * PAGE_SIZE, PAGE_SIZE);
memset(adr, 0, PAGE_SIZE);
- *index = i;
- *phys = pfn * PAGE_SIZE;
- return adr;
-}
+ *phys = pfn * PAGE_SIZE;
+ return adr;
+}
-static __meminit void unmap_low_page(int i)
+static __meminit void unmap_low_page(void *adr)
{
- struct temp_map *ti;
if (after_bootmem)
return;
- ti = &temp_mappings[i];
- set_pmd(ti->pmd, __pmd(0));
- ti->allocated = 0;
+ early_iounmap(adr, PAGE_SIZE);
}
/* Must run before zap_low_mappings */
-__init void *early_ioremap(unsigned long addr, unsigned long size)
+__meminit void *early_ioremap(unsigned long addr, unsigned long size)
{
- unsigned long map = round_down(addr, LARGE_PAGE_SIZE);
-
- /* actually usually some more */
- if (size >= LARGE_PAGE_SIZE) {
- return NULL;
+ unsigned long vaddr;
+ pmd_t *pmd, *last_pmd;
+ int i, pmds;
+
+ pmds = ((addr & ~PMD_MASK) + size + ~PMD_MASK) / PMD_SIZE;
+ vaddr = __START_KERNEL_map;
+ pmd = level2_kernel_pgt;
+ last_pmd = level2_kernel_pgt + PTRS_PER_PMD - 1;
+ for (; pmd <= last_pmd; pmd++, vaddr += PMD_SIZE) {
+ for (i = 0; i < pmds; i++) {
+ if (pmd_present(pmd[i]))
+ goto next;
+ }
+ vaddr += addr & ~PMD_MASK;
+ addr &= PMD_MASK;
+ for (i = 0; i < pmds; i++, addr += PMD_SIZE)
+ set_pmd(pmd + i,__pmd(addr | _KERNPG_TABLE | _PAGE_PSE));
+ __flush_tlb();
+ return (void *)vaddr;
+ next:
+ ;
}
- set_pmd(temp_mappings[0].pmd, __pmd(map | _KERNPG_TABLE | _PAGE_PSE));
- map += LARGE_PAGE_SIZE;
- set_pmd(temp_mappings[1].pmd, __pmd(map | _KERNPG_TABLE | _PAGE_PSE));
- __flush_tlb();
- return temp_mappings[0].address + (addr & (LARGE_PAGE_SIZE-1));
+ printk("early_ioremap(0x%lx, %lu) failed\n", addr, size);
+ return NULL;
}
/* To avoid virtual aliases later */
-__init void early_iounmap(void *addr, unsigned long size)
+__meminit void early_iounmap(void *addr, unsigned long size)
{
- if ((void *)round_down((unsigned long)addr, LARGE_PAGE_SIZE) != temp_mappings[0].address)
- printk("early_iounmap: bad address %p\n", addr);
- set_pmd(temp_mappings[0].pmd, __pmd(0));
- set_pmd(temp_mappings[1].pmd, __pmd(0));
+ unsigned long vaddr;
+ pmd_t *pmd;
+ int i, pmds;
+
+ vaddr = (unsigned long)addr;
+ pmds = ((vaddr & ~PMD_MASK) + size + ~PMD_MASK) / PMD_SIZE;
+ pmd = level2_kernel_pgt + pmd_index(vaddr);
+ for (i = 0; i < pmds; i++)
+ pmd_clear(pmd + i);
__flush_tlb();
}
for (; i < PTRS_PER_PUD; i++, addr = (addr & PUD_MASK) + PUD_SIZE ) {
- int map;
unsigned long pmd_phys;
pud_t *pud = pud_page + pud_index(addr);
pmd_t *pmd;
continue;
}
- pmd = alloc_low_page(&map, &pmd_phys);
+ pmd = alloc_low_page(&pmd_phys);
spin_lock(&init_mm.page_table_lock);
set_pud(pud, __pud(pmd_phys | _KERNPG_TABLE));
phys_pmd_init(pmd, addr, end);
spin_unlock(&init_mm.page_table_lock);
- unmap_low_page(map);
+ unmap_low_page(pmd);
}
__flush_tlb();
}
end = (unsigned long)__va(end);
for (; start < end; start = next) {
- int map;
unsigned long pud_phys;
pgd_t *pgd = pgd_offset_k(start);
pud_t *pud;
if (after_bootmem)
pud = pud_offset(pgd, start & PGDIR_MASK);
else
- pud = alloc_low_page(&map, &pud_phys);
+ pud = alloc_low_page(&pud_phys);
next = start + PGDIR_SIZE;
if (next > end)
phys_pud_init(pud, __pa(start), __pa(next));
if (!after_bootmem)
set_pgd(pgd_offset_k(start), mk_kernel_pgd(pud_phys));
- unmap_low_page(map);
+ unmap_low_page(pud);
}
if (!after_bootmem)
__flush_tlb_all();
}
-void __cpuinit zap_low_mappings(int cpu)
-{
- if (cpu == 0) {
- pgd_t *pgd = pgd_offset_k(0UL);
- pgd_clear(pgd);
- } else {
- /*
- * For AP's, zap the low identity mappings by changing the cr3
- * to init_level4_pgt and doing local flush tlb all
- */
- asm volatile("movq %0,%%cr3" :: "r" (__pa_symbol(&init_level4_pgt)));
- }
- __flush_tlb_all();
-}
-
#ifndef CONFIG_NUMA
void __init paging_init(void)
{
reservedpages << (PAGE_SHIFT-10),
datasize >> 10,
initsize >> 10);
-
-#ifdef CONFIG_SMP
- /*
- * Sync boot_level4_pgt mappings with the init_level4_pgt
- * except for the low identity mappings which are already zapped
- * in init_level4_pgt. This sync-up is essential for AP's bringup
- */
- memcpy(boot_level4_pgt+1, init_level4_pgt+1, (PTRS_PER_PGD-1)*sizeof(pgd_t));
-#endif
}
void free_init_pages(char *what, unsigned long begin, unsigned long end)
if (begin >= end)
return;
- printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10);
+ printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10);
for (addr = begin; addr < end; addr += PAGE_SIZE) {
ClearPageReserved(virt_to_page(addr));
init_page_count(virt_to_page(addr));
memset((void *)(addr & ~(PAGE_SIZE-1)),
POISON_FREE_INITMEM, PAGE_SIZE);
+ if (addr >= __START_KERNEL_map)
+ change_page_attr_addr(addr, 1, __pgprot(0));
free_page(addr);
totalram_pages++;
}
+ if (addr > __START_KERNEL_map)
+ global_flush_tlb();
}
void free_initmem(void)
{
- memset(__initdata_begin, POISON_FREE_INITDATA,
- __initdata_end - __initdata_begin);
free_init_pages("unused kernel memory",
(unsigned long)(&__init_begin),
(unsigned long)(&__init_end));
void mark_rodata_ro(void)
{
- unsigned long addr = (unsigned long)__start_rodata;
+ unsigned long start = (unsigned long)_stext, end;
- for (; addr < (unsigned long)__end_rodata; addr += PAGE_SIZE)
- change_page_attr_addr(addr, 1, PAGE_KERNEL_RO);
+#ifdef CONFIG_HOTPLUG_CPU
+ /* It must still be possible to apply SMP alternatives. */
+ if (num_possible_cpus() > 1)
+ start = (unsigned long)_etext;
+#endif
+ end = (unsigned long)__end_rodata;
+ start = (start + PAGE_SIZE - 1) & PAGE_MASK;
+ end &= PAGE_MASK;
+ if (end <= start)
+ return;
- printk ("Write protecting the kernel read-only data: %luk\n",
- (__end_rodata - __start_rodata) >> 10);
+ change_page_attr_addr(start, (end - start) >> PAGE_SHIFT, PAGE_KERNEL_RO);
+
+ printk(KERN_INFO "Write protecting the kernel read-only data: %luk\n",
+ (end - start) >> 10);
/*
* change_page_attr_addr() requires a global_flush_tlb() call after it.
extern int exception_trace, page_fault_trace;
static ctl_table debug_table2[] = {
- { 99, "exception-trace", &exception_trace, sizeof(int), 0644, NULL,
- proc_dointvec },
- { 0, }
+ {
+ .ctl_name = 99,
+ .procname = "exception-trace",
+ .data = &exception_trace,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec
+ },
+ {}
};
static ctl_table debug_root_table2[] = {
- { .ctl_name = CTL_DEBUG, .procname = "debug", .mode = 0555,
- .child = debug_table2 },
- { 0 },
+ {
+ .ctl_name = CTL_DEBUG,
+ .procname = "debug",
+ .mode = 0555,
+ .child = debug_table2
+ },
+ {}
};
static __init int x8664_sysctl_init(void)
{
- register_sysctl_table(debug_root_table2, 0);
+ register_sysctl_table(debug_root_table2);
return 0;
}
__initcall(x8664_sysctl_init);
{
return (addr >= VSYSCALL_START) && (addr < VSYSCALL_END);
}
+
+void *alloc_bootmem_high_node(pg_data_t *pgdat, unsigned long size)
+{
+ return __alloc_bootmem_core(pgdat->bdata, size,
+ SMP_CACHE_BYTES, (4UL*1024*1024*1024), 0);
+}
projects / karo-tx-linux.git / blobdiff