static void __init contig_initmem_init(void)
{
unsigned long bootmap_size, bootmap;
bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size);
if (bootmap == -1L)
panic("Cannot find bootmem map of size %ld\n",bootmap_size);
bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
e820_bootmem_free(&contig_page_data, 0, end_pfn << PAGE_SHIFT);
reserve_bootmem(bootmap, bootmap_size);
}
void __init reserve_trampoline_memory(void)
{
unsigned long mem;
/* Has to be in very low memory so we can execute real-mode AP code. */
mem = find_e820_area(0, 1<<20, TRAMPOLINE_SIZE, PAGE_SIZE);
if (mem == -1L)
panic("Cannot allocate trampoline\n");
trampoline_base = __va(mem);
reserve_early(mem, mem + TRAMPOLINE_SIZE, "TRAMPOLINE");
}
static void __init
contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
{
unsigned long bootmap_size, bootmap;
bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size);
if (bootmap == -1L)
panic("Cannot find bootmem map of size %ld\n",bootmap_size);
bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
e820_bootmem_free(NODE_DATA(0), 0, end_pfn << PAGE_SHIFT);
reserve_bootmem(bootmap, bootmap_size, BOOTMEM_DEFAULT);
}
/**
* This sets up the bootstrap memory allocator. It is a simple
* bitmap based allocator that tracks memory at a page granularity.
* Once the bootstrap process is complete, each unallocated page
* is added to the real memory allocator's free pool. Memory allocated
* during bootstrap remains allocated forever, unless explicitly
* freed before turning things over to the real memory allocator.
*/
static void __init
setup_bootmem_allocator(
unsigned long start_pfn,
unsigned long end_pfn
)
{
unsigned long bootmap_size, bootmap;
bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size, PAGE_SIZE);
if (bootmap == -1L)
panic("Cannot find bootmem map of size %ld\n",bootmap_size);
bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
e820_bootmem_free(0, end_pfn << PAGE_SHIFT);
reserve_bootmem(bootmap, bootmap_size);
}
/* Callback for SLIT parsing */
void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
{
unsigned length;
unsigned long phys;
length = slit->header.length;
phys = find_e820_area(0, max_pfn_mapped<<PAGE_SHIFT, length,
PAGE_SIZE);
if (phys == -1L)
panic(" Can not save slit!\n");
acpi_slit = __va(phys);
memcpy(acpi_slit, slit, length);
reserve_early(phys, phys + length, "ACPI SLIT");
}
static void __init
contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
{
unsigned long bootmap_size, bootmap;
bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size);
if (bootmap == -1L)
panic("Cannot find bootmem map of size %ld\n",bootmap_size);
bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
#ifdef CONFIG_XEN
e820_bootmem_free(NODE_DATA(0), 0, xen_start_info->nr_pages<<PAGE_SHIFT);
#else
e820_bootmem_free(NODE_DATA(0), 0, end_pfn << PAGE_SHIFT);
#endif
reserve_bootmem(bootmap, bootmap_size);
}
/**
* acpi_reserve_wakeup_memory - do _very_ early ACPI initialisation
*
* We allocate a page from the first 1MB of memory for the wakeup
* routine for when we come back from a sleep state. The
* runtime allocator allows specification of <16MB pages, but not
* <1MB pages.
*/
void __init acpi_reserve_wakeup_memory(void)
{
unsigned long mem;
if ((&wakeup_code_end - &wakeup_code_start) > WAKEUP_SIZE) {
printk(KERN_ERR
"ACPI: Wakeup code way too big, S3 disabled.\n");
return;
}
mem = find_e820_area(0, 1<<20, WAKEUP_SIZE, PAGE_SIZE);
if (mem == -1L) {
printk(KERN_ERR "ACPI: Cannot allocate lowmem, S3 disabled.\n");
return;
}
acpi_realmode = (unsigned long) phys_to_virt(mem);
acpi_wakeup_address = mem;
reserve_early(mem, mem + WAKEUP_SIZE, "ACPI WAKEUP");
}
static void __init find_early_table_space(unsigned long end)
{
unsigned long puds, pmds, tables, start;
puds = (end + PUD_SIZE - 1) >> PUD_SHIFT;
pmds = (end + PMD_SIZE - 1) >> PMD_SHIFT;
tables = round_up(puds * sizeof(pud_t), PAGE_SIZE) +
round_up(pmds * sizeof(pmd_t), PAGE_SIZE);
/* RED-PEN putting page tables only on node 0 could
cause a hotspot and fill up ZONE_DMA. The page tables
need roughly 0.5KB per GB. */
start = 0x8000;
table_start = find_e820_area(start, end, tables);
if (table_start == -1UL)
panic("Cannot find space for the kernel page tables");
table_start >>= PAGE_SHIFT;
table_end = table_start;
early_printk("kernel direct mapping tables up to %lx @ %lx-%lx\n",
end, table_start << PAGE_SHIFT,
(table_start << PAGE_SHIFT) + tables);
}