void __init do_init_bootmem(void)
{
unsigned long i;
unsigned long start, bootmap_pages;
unsigned long total_pages;
int boot_mapsize;
max_pfn = total_pages = lmb_end_of_DRAM() >> PAGE_SHIFT;
#ifdef CONFIG_HIGHMEM
total_pages = total_lowmem >> PAGE_SHIFT;
#endif
/*
* Find an area to use for the bootmem bitmap. Calculate the size of
* bitmap required as (Total Memory) / PAGE_SIZE / BITS_PER_BYTE.
* Add 1 additional page in case the address isn't page-aligned.
*/
bootmap_pages = bootmem_bootmap_pages(total_pages);
start = lmb_alloc(bootmap_pages << PAGE_SHIFT, PAGE_SIZE);
BUG_ON(!start);
boot_mapsize = init_bootmem(start >> PAGE_SHIFT, total_pages);
/* Add all physical memory to the bootmem map, mark each area
* present.
*/
for (i = 0; i < lmb.memory.cnt; i++) {
unsigned long base = lmb.memory.region[i].base;
unsigned long size = lmb_size_bytes(&lmb.memory, i);
#ifdef CONFIG_HIGHMEM
if (base >= total_lowmem)
continue;
if (base + size > total_lowmem)
size = total_lowmem - base;
#endif
free_bootmem(base, size);
}
/* reserve the sections we're already using */
for (i = 0; i < lmb.reserved.cnt; i++)
reserve_bootmem(lmb.reserved.region[i].base,
lmb_size_bytes(&lmb.reserved, i));
/* XXX need to clip this if using highmem? */
for (i = 0; i < lmb.memory.cnt; i++)
memory_present(0, lmb_start_pfn(&lmb.memory, i),
lmb_end_pfn(&lmb.memory, i));
init_bootmem_done = 1;
}
void __init do_init_bootmem(void)
{
unsigned long i;
unsigned long start, bootmap_pages;
unsigned long total_pages;
int boot_mapsize;
max_pfn = total_pages = lmb_end_of_DRAM() >> PAGE_SHIFT;
#ifdef CONFIG_HIGHMEM
total_pages = total_lowmem >> PAGE_SHIFT;
#endif
/*
* Find an area to use for the bootmem bitmap. Calculate the size of
* bitmap required as (Total Memory) / PAGE_SIZE / BITS_PER_BYTE.
* Add 1 additional page in case the address isn't page-aligned.
*/
bootmap_pages = bootmem_bootmap_pages(total_pages);
start = lmb_alloc(bootmap_pages << PAGE_SHIFT, PAGE_SIZE);
boot_mapsize = init_bootmem(start >> PAGE_SHIFT, total_pages);
/* Add active regions with valid PFNs */
for (i = 0; i < lmb.memory.cnt; i++) {
unsigned long start_pfn, end_pfn;
start_pfn = lmb.memory.region[i].base >> PAGE_SHIFT;
end_pfn = start_pfn + lmb_size_pages(&lmb.memory, i);
add_active_range(0, start_pfn, end_pfn);
}
/* Add all physical memory to the bootmem map, mark each area
* present.
*/
#ifdef CONFIG_HIGHMEM
free_bootmem_with_active_regions(0, total_lowmem >> PAGE_SHIFT);
#else
free_bootmem_with_active_regions(0, max_pfn);
#endif
/* reserve the sections we're already using */
for (i = 0; i < lmb.reserved.cnt; i++)
reserve_bootmem(lmb.reserved.region[i].base,
lmb_size_bytes(&lmb.reserved, i));
/* XXX need to clip this if using highmem? */
sparse_memory_present_with_active_regions(0);
init_bootmem_done = 1;
}
void __init setup_memory(void)
{
int i;
unsigned long map_size;
u32 kernel_align_start, kernel_align_size;
/* Find main memory where is the kernel */
for (i = 0; i < lmb.memory.cnt; i++) {
memory_start = (u32) lmb.memory.region[i].base;
memory_end = (u32) lmb.memory.region[i].base
+ (u32) lmb.memory.region[i].size;
if ((memory_start <= (u32)_text) &&
((u32)_text <= memory_end)) {
memory_size = memory_end - memory_start;
PAGE_OFFSET = memory_start;
printk(KERN_INFO "%s: Main mem: 0x%x-0x%x, "
"size 0x%08x\n", __func__, memory_start,
memory_end, memory_size);
break;
}
}
if (!memory_start || !memory_end) {
panic("%s: Missing memory setting 0x%08x-0x%08x\n",
__func__, memory_start, memory_end);
}
/* reservation of region where is the kernel */
kernel_align_start = PAGE_DOWN((u32)_text);
/* ALIGN can be remove because _end in vmlinux.lds.S is align */
kernel_align_size = PAGE_UP((u32)klimit) - kernel_align_start;
lmb_reserve(kernel_align_start, kernel_align_size);
printk(KERN_INFO "%s: kernel addr=0x%08x-0x%08x size=0x%08x\n",
__func__, kernel_align_start, kernel_align_start
+ kernel_align_size, kernel_align_size);
/*
* Kernel:
* start: base phys address of kernel - page align
* end: base phys address of kernel - page align
*
* min_low_pfn - the first page (mm/bootmem.c - node_boot_start)
* max_low_pfn
* max_mapnr - the first unused page (mm/bootmem.c - node_low_pfn)
* num_physpages - number of all pages
*/
/* memory start is from the kernel end (aligned) to higher addr */
min_low_pfn = memory_start >> PAGE_SHIFT; /* minimum for allocation */
/* RAM is assumed contiguous */
num_physpages = max_mapnr = memory_size >> PAGE_SHIFT;
max_pfn = max_low_pfn = memory_end >> PAGE_SHIFT;
printk(KERN_INFO "%s: max_mapnr: %#lx\n", __func__, max_mapnr);
printk(KERN_INFO "%s: min_low_pfn: %#lx\n", __func__, min_low_pfn);
printk(KERN_INFO "%s: max_low_pfn: %#lx\n", __func__, max_low_pfn);
/*
* Find an area to use for the bootmem bitmap.
* We look for the first area which is at least
* 128kB in length (128kB is enough for a bitmap
* for 4GB of memory, using 4kB pages), plus 1 page
* (in case the address isn't page-aligned).
*/
map_size = init_bootmem_node(NODE_DATA(0), PFN_UP(TOPHYS((u32)_end)),
min_low_pfn, max_low_pfn);
lmb_reserve(PFN_UP(TOPHYS((u32)_end)) << PAGE_SHIFT, map_size);
/* free bootmem is whole main memory */
free_bootmem(memory_start, memory_size);
/* reserve allocate blocks */
for (i = 0; i < lmb.reserved.cnt; i++) {
pr_debug("reserved %d - 0x%08x-0x%08x\n", i,
(u32) lmb.reserved.region[i].base,
(u32) lmb_size_bytes(&lmb.reserved, i));
reserve_bootmem(lmb.reserved.region[i].base,
lmb_size_bytes(&lmb.reserved, i) - 1, BOOTMEM_DEFAULT);
}
paging_init();
}
