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mm/blackfin: prepare for removing num_physpages and simplify mem_init() 

Prepare for removing num_physpages and simplify mem_init().

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Bob Liu <lliubbo@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jiang Liu 2013-07-03 15:03:51 -07:00 committed by Linus Torvalds
parent 6703bdf669
commit d9d7e76981
1 changed files with 6 additions and 32 deletions
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38
arch/blackfin/mm/init.c
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@ -90,43 +90,17 @@ asmlinkage void __init init_pda(void)
void __init mem_init(void)
{
unsigned int codek = 0, datak = 0, initk = 0;
unsigned int reservedpages = 0, freepages = 0;
unsigned long tmp;
unsigned long start_mem = memory_start;
unsigned long end_mem = memory_end;
char buf[64];
end_mem &= PAGE_MASK;
high_memory = (void *)end_mem;
start_mem = PAGE_ALIGN(start_mem);
max_mapnr = num_physpages = MAP_NR(high_memory);
printk(KERN_DEBUG "Kernel managed physical pages: %lu\n", num_physpages);
high_memory = (void *)(memory_end & PAGE_MASK);
max_mapnr = MAP_NR(high_memory);
printk(KERN_DEBUG "Kernel managed physical pages: %lu\n", max_mapnr);
/* This will put all low memory onto the freelists. */
free_all_bootmem();
reservedpages = 0;
for (tmp = ARCH_PFN_OFFSET; tmp < max_mapnr; tmp++)
if (PageReserved(pfn_to_page(tmp)))
reservedpages++;
freepages = max_mapnr - ARCH_PFN_OFFSET - reservedpages;
/* do not count in kernel image between _rambase and _ramstart */
reservedpages -= (_ramstart - _rambase) >> PAGE_SHIFT;
#if (defined(CONFIG_BFIN_EXTMEM_ICACHEABLE) && ANOMALY_05000263)
reservedpages += (_ramend - memory_end - DMA_UNCACHED_REGION) >> PAGE_SHIFT;
#endif
codek = (_etext - _stext) >> 10;
initk = (__init_end - __init_begin) >> 10;
datak = ((_ramstart - _rambase) >> 10) - codek - initk;
printk(KERN_INFO
"Memory available: %luk/%luk RAM, "
"(%uk init code, %uk kernel code, %uk data, %uk dma, %uk reserved)\n",
(unsigned long) freepages << (PAGE_SHIFT-10), (_ramend - CONFIG_PHY_RAM_BASE_ADDRESS) >> 10,
initk, codek, datak, DMA_UNCACHED_REGION >> 10, (reservedpages << (PAGE_SHIFT-10)));
snprintf(buf, sizeof(buf) - 1, "%uK DMA", DMA_UNCACHED_REGION >> 10);
mem_init_print_info(buf);
}
#ifdef CONFIG_BLK_DEV_INITRD