static void free_owl_reserved_memory(unsigned int free_start, unsigned int free_size)
{
unsigned long n, start, end;
#ifdef CONFIG_HIGHMEM
unsigned long max_low = max_low_pfn + PHYS_PFN_OFFSET;
#endif
start = free_start;
end = free_start + free_size;
if( (start >> PAGE_SHIFT) <= max_low ) {
if( (end >> PAGE_SHIFT) > max_low )
end = max_low << PAGE_SHIFT;
n = free_reserved_area(__phys_to_virt(start), __phys_to_virt(end), 0, NULL);
printk("free reserve pages %lu to buddy system\n", n);
}
#ifdef CONFIG_HIGHMEM
start = free_start >> PAGE_SHIFT;
end = (free_start + free_size) >> PAGE_SHIFT;
if( end > max_low ) {
if(start < max_low)
start = max_low;
for (n = start; n < end; n++)
free_highmem_page(pfn_to_page(n));
printk("free reserve high memory pages %lu to buddy system\n", end - start);
}
#endif
}
static void highmem_setup(void)
{
unsigned long pfn;
for (pfn = max_low_pfn; pfn < max_pfn; ++pfn) {
struct page *page = pfn_to_page(pfn);
/* FIXME not sure about */
if (!memblock_is_reserved(pfn << PAGE_SHIFT))
free_highmem_page(page);
}
}
/*
* mem_init - initializes memory
*
* Frees up bootmem
* Calculates and displays memory available/used
*/
void __init mem_init(void)
{
#ifdef CONFIG_HIGHMEM
unsigned long tmp;
reset_all_zones_managed_pages();
for (tmp = min_high_pfn; tmp < max_pfn; tmp++)
free_highmem_page(pfn_to_page(tmp));
#endif
free_all_bootmem();
mem_init_print_info(NULL);
}
static void __init free_area_high(unsigned long pfn, unsigned long end)
{
for (; pfn < end; pfn++)
free_highmem_page(pfn_to_page(pfn));
}
void __init mem_init(void)
{
#ifdef CONFIG_HIGHMEM
unsigned long tmp;
reset_all_zones_managed_pages();
for (tmp = max_low_pfn; tmp < max_pfn; tmp++)
free_highmem_page(pfn_to_page(tmp));
#endif
max_mapnr = max_pfn - ARCH_PFN_OFFSET;
high_memory = (void *)__va(max_low_pfn << PAGE_SHIFT);
free_all_bootmem();
mem_init_print_info(NULL);
pr_info("virtual kernel memory layout:\n"
#ifdef CONFIG_KASAN
" kasan : 0x%08lx - 0x%08lx (%5lu MB)\n"
#endif
#ifdef CONFIG_MMU
" vmalloc : 0x%08lx - 0x%08lx (%5lu MB)\n"
#endif
#ifdef CONFIG_HIGHMEM
" pkmap : 0x%08lx - 0x%08lx (%5lu kB)\n"
" fixmap : 0x%08lx - 0x%08lx (%5lu kB)\n"
#endif
" lowmem : 0x%08lx - 0x%08lx (%5lu MB)\n"
" .text : 0x%08lx - 0x%08lx (%5lu kB)\n"
" .rodata : 0x%08lx - 0x%08lx (%5lu kB)\n"
" .data : 0x%08lx - 0x%08lx (%5lu kB)\n"
" .init : 0x%08lx - 0x%08lx (%5lu kB)\n"
" .bss : 0x%08lx - 0x%08lx (%5lu kB)\n",
#ifdef CONFIG_KASAN
KASAN_SHADOW_START, KASAN_SHADOW_START + KASAN_SHADOW_SIZE,
KASAN_SHADOW_SIZE >> 20,
#endif
#ifdef CONFIG_MMU
VMALLOC_START, VMALLOC_END,
(VMALLOC_END - VMALLOC_START) >> 20,
#ifdef CONFIG_HIGHMEM
PKMAP_BASE, PKMAP_BASE + LAST_PKMAP * PAGE_SIZE,
(LAST_PKMAP*PAGE_SIZE) >> 10,
FIXADDR_START, FIXADDR_TOP,
(FIXADDR_TOP - FIXADDR_START) >> 10,
#endif
PAGE_OFFSET, PAGE_OFFSET +
(max_low_pfn - min_low_pfn) * PAGE_SIZE,
#else
min_low_pfn * PAGE_SIZE, max_low_pfn * PAGE_SIZE,
#endif
((max_low_pfn - min_low_pfn) * PAGE_SIZE) >> 20,
(unsigned long)_text, (unsigned long)_etext,
(unsigned long)(_etext - _text) >> 10,
(unsigned long)__start_rodata, (unsigned long)_sdata,
(unsigned long)(_sdata - __start_rodata) >> 10,
(unsigned long)_sdata, (unsigned long)_edata,
(unsigned long)(_edata - _sdata) >> 10,
(unsigned long)__init_begin, (unsigned long)__init_end,
(unsigned long)(__init_end - __init_begin) >> 10,
(unsigned long)__bss_start, (unsigned long)__bss_stop,
(unsigned long)(__bss_stop - __bss_start) >> 10);
}
