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OpenCloudOS-Kernel
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[SPARC64]: Fully use LMB information in bootmem_init(). 

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2008-02-13 18:31:41 -08:00
parent 25b0c659df
commit 9422273ba7
1 changed files with 18 additions and 82 deletions
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100
arch/sparc64/mm/init.c
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@ -722,57 +722,12 @@ out:
static unsigned long __init choose_bootmap_pfn(unsigned long start_pfn,
unsigned long end_pfn)
{
unsigned long avoid_start, avoid_end, bootmap_size;
int i;
unsigned long bootmap_size;
bootmap_size = bootmem_bootmap_pages(end_pfn - start_pfn);
bootmap_size <<= PAGE_SHIFT;
avoid_start = avoid_end = 0;
#ifdef CONFIG_BLK_DEV_INITRD
avoid_start = initrd_start;
avoid_end = PAGE_ALIGN(initrd_end);
#endif
for (i = 0; i < pavail_ents; i++) {
unsigned long start, end;
start = pavail[i].phys_addr;
end = start + pavail[i].reg_size;
while (start < end) {
if (start >= kern_base &&
start < PAGE_ALIGN(kern_base + kern_size)) {
start = PAGE_ALIGN(kern_base + kern_size);
continue;
}
if (start >= avoid_start && start < avoid_end) {
start = avoid_end;
continue;
}
if ((end - start) < bootmap_size)
break;
if (start < kern_base &&
(start + bootmap_size) > kern_base) {
start = PAGE_ALIGN(kern_base + kern_size);
continue;
}
if (start < avoid_start &&
(start + bootmap_size) > avoid_start) {
start = avoid_end;
continue;
}
/* OK, it doesn't overlap anything, use it. */
return start >> PAGE_SHIFT;
}
}
prom_printf("Cannot find free area for bootmap, aborting.\n");
prom_halt();
return lmb_alloc(bootmap_size, PAGE_SIZE) >> PAGE_SHIFT;
}
static void __init find_ramdisk(unsigned long phys_base)
@ -825,8 +780,7 @@ static void __init find_ramdisk(unsigned long phys_base)
static unsigned long __init bootmem_init(unsigned long *pages_avail,
unsigned long phys_base)
{
unsigned long bootmap_size, end_pfn;
unsigned long bootmap_pfn, size;
unsigned long end_pfn;
int i;
*pages_avail = lmb_phys_mem_size() >> PAGE_SHIFT;
@ -836,49 +790,31 @@ static unsigned long __init bootmem_init(unsigned long *pages_avail,
max_pfn = max_low_pfn = end_pfn;
min_low_pfn = (phys_base >> PAGE_SHIFT);
bootmap_pfn = choose_bootmap_pfn(min_low_pfn, end_pfn);
bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap_pfn,
min_low_pfn, end_pfn);
init_bootmem_node(NODE_DATA(0),
choose_bootmap_pfn(min_low_pfn, end_pfn),
min_low_pfn, end_pfn);
/* Now register the available physical memory with the
* allocator.
*/
for (i = 0; i < pavail_ents; i++)
free_bootmem(pavail[i].phys_addr, pavail[i].reg_size);
for (i = 0; i < lmb.memory.cnt; i++)
free_bootmem(lmb.memory.region[i].base,
lmb_size_bytes(&lmb.memory, i));
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start) {
size = initrd_end - initrd_start;
for (i = 0; i < lmb.reserved.cnt; i++)
reserve_bootmem(lmb.reserved.region[i].base,
lmb_size_bytes(&lmb.reserved, i),
BOOTMEM_DEFAULT);
/* Reserve the initrd image area. */
reserve_bootmem(initrd_start, size, BOOTMEM_DEFAULT);
initrd_start += PAGE_OFFSET;
initrd_end += PAGE_OFFSET;
}
#endif
/* Reserve the kernel text/data/bss. */
reserve_bootmem(kern_base, kern_size, BOOTMEM_DEFAULT);
*pages_avail -= PAGE_ALIGN(kern_size) >> PAGE_SHIFT;
/* Add back in the initmem pages. */
size = ((unsigned long)(__init_end) & PAGE_MASK) -
PAGE_ALIGN((unsigned long)__init_begin);
*pages_avail += size >> PAGE_SHIFT;
for (i = 0; i < lmb.memory.cnt; ++i) {
unsigned long start_pfn, end_pfn, pages;
/* Reserve the bootmem map. We do not account for it
* in pages_avail because we will release that memory
* in free_all_bootmem.
*/
size = bootmap_size;
reserve_bootmem((bootmap_pfn << PAGE_SHIFT), size, BOOTMEM_DEFAULT);
pages = lmb_size_pages(&lmb.memory, i);
start_pfn = lmb.memory.region[i].base >> PAGE_SHIFT;
end_pfn = start_pfn + pages;
for (i = 0; i < pavail_ents; i++) {
unsigned long start_pfn, end_pfn;
start_pfn = pavail[i].phys_addr >> PAGE_SHIFT;
end_pfn = (start_pfn + (pavail[i].reg_size >> PAGE_SHIFT));
memory_present(0, start_pfn, end_pfn);
}