[linux-2.6-block.git] / arch / powerpc / mm / hugetlbpage-radix.c

#include <linux/mm.h>
#include <linux/hugetlb.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/cacheflush.h>
#include <asm/machdep.h>
#include <asm/mman.h>
#include <asm/tlb.h>

void radix__flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
{
	int psize;
	struct hstate *hstate = hstate_file(vma->vm_file);

	psize = hstate_get_psize(hstate);
	radix__flush_tlb_page_psize(vma->vm_mm, vmaddr, psize);
}

void radix__local_flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
{
	int psize;
	struct hstate *hstate = hstate_file(vma->vm_file);

	psize = hstate_get_psize(hstate);
	radix__local_flush_tlb_page_psize(vma->vm_mm, vmaddr, psize);
}

void radix__flush_hugetlb_tlb_range(struct vm_area_struct *vma, unsigned long start,
				   unsigned long end)
{
	int psize;
	struct hstate *hstate = hstate_file(vma->vm_file);

	psize = hstate_get_psize(hstate);
	radix__flush_tlb_range_psize(vma->vm_mm, start, end, psize);
}

/*
 * A vairant of hugetlb_get_unmapped_area doing topdown search
 * FIXME!! should we do as x86 does or non hugetlb area does ?
 * ie, use topdown or not based on mmap_is_legacy check ?
 */
unsigned long
radix__hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
				unsigned long len, unsigned long pgoff,
				unsigned long flags)
{
	struct mm_struct *mm = current->mm;
	struct vm_area_struct *vma;
	struct hstate *h = hstate_file(file);
	struct vm_unmapped_area_info info;

	if (unlikely(addr > mm->context.addr_limit && addr < TASK_SIZE))
		mm->context.addr_limit = TASK_SIZE;

	if (len & ~huge_page_mask(h))
		return -EINVAL;
	if (len > mm->task_size)
		return -ENOMEM;

	if (flags & MAP_FIXED) {
		if (prepare_hugepage_range(file, addr, len))
			return -EINVAL;
		return addr;
	}

	if (addr) {
		addr = ALIGN(addr, huge_page_size(h));
		vma = find_vma(mm, addr);
		if (mm->task_size - len >= addr &&
		    (!vma || addr + len <= vma->vm_start))
			return addr;
	}
	/*
	 * We are always doing an topdown search here. Slice code
	 * does that too.
	 */
	info.flags = VM_UNMAPPED_AREA_TOPDOWN;
	info.length = len;
	info.low_limit = PAGE_SIZE;
	info.high_limit = current->mm->mmap_base;
	info.align_mask = PAGE_MASK & ~huge_page_mask(h);
	info.align_offset = 0;

	if (addr > DEFAULT_MAP_WINDOW)
		info.high_limit += mm->context.addr_limit - DEFAULT_MAP_WINDOW;

	return vm_unmapped_area(&info);
}
Commit	Line	Data
48483760 AK	1	#include <linux/mm.h>
	2	#include <linux/hugetlb.h>
	3	#include <asm/pgtable.h>
	4	#include <asm/pgalloc.h>
	5	#include <asm/cacheflush.h>
	6	#include <asm/machdep.h>
	7	#include <asm/mman.h>
fbfa26d8	8	#include <asm/tlb.h>
48483760 AK	9
	10	void radix__flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
	11	{
fbfa26d8	12	int psize;
48483760 AK	13	struct hstate *hstate = hstate_file(vma->vm_file);
48483760 AK	14
fbfa26d8 AK	15	psize = hstate_get_psize(hstate);
fbfa26d8 AK	16	radix__flush_tlb_page_psize(vma->vm_mm, vmaddr, psize);
48483760 AK	17	}
	18
	19	void radix__local_flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
	20	{
fbfa26d8	21	int psize;
48483760 AK	22	struct hstate *hstate = hstate_file(vma->vm_file);
48483760 AK	23
fbfa26d8 AK	24	psize = hstate_get_psize(hstate);
fbfa26d8 AK	25	radix__local_flush_tlb_page_psize(vma->vm_mm, vmaddr, psize);
48483760 AK	26	}
48483760 AK	27
5491ae7b AK	28	void radix__flush_hugetlb_tlb_range(struct vm_area_struct *vma, unsigned long start,
	29	unsigned long end)
	30	{
	31	int psize;
	32	struct hstate *hstate = hstate_file(vma->vm_file);
	33
	34	psize = hstate_get_psize(hstate);
	35	radix__flush_tlb_range_psize(vma->vm_mm, start, end, psize);
	36	}
	37
48483760 AK	38	/*
	39	* A vairant of hugetlb_get_unmapped_area doing topdown search
	40	* FIXME!! should we do as x86 does or non hugetlb area does ?
	41	* ie, use topdown or not based on mmap_is_legacy check ?
	42	*/
	43	unsigned long
	44	radix__hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
	45	unsigned long len, unsigned long pgoff,
	46	unsigned long flags)
	47	{
	48	struct mm_struct *mm = current->mm;
	49	struct vm_area_struct *vma;
	50	struct hstate *h = hstate_file(file);
	51	struct vm_unmapped_area_info info;
	52
f4ea6dcb AK	53	if (unlikely(addr > mm->context.addr_limit && addr < TASK_SIZE))
	54	mm->context.addr_limit = TASK_SIZE;
	55
48483760 AK	56	if (len & ~huge_page_mask(h))
48483760 AK	57	return -EINVAL;
be77e999	58	if (len > mm->task_size)
48483760 AK	59	return -ENOMEM;
	60
	61	if (flags & MAP_FIXED) {
	62	if (prepare_hugepage_range(file, addr, len))
	63	return -EINVAL;
	64	return addr;
	65	}
	66
	67	if (addr) {
	68	addr = ALIGN(addr, huge_page_size(h));
	69	vma = find_vma(mm, addr);
be77e999	70	if (mm->task_size - len >= addr &&
48483760 AK	71	(!vma \|\| addr + len <= vma->vm_start))
	72	return addr;
	73	}
	74	/*
	75	* We are always doing an topdown search here. Slice code
	76	* does that too.
	77	*/
	78	info.flags = VM_UNMAPPED_AREA_TOPDOWN;
	79	info.length = len;
	80	info.low_limit = PAGE_SIZE;
	81	info.high_limit = current->mm->mmap_base;
	82	info.align_mask = PAGE_MASK & ~huge_page_mask(h);
	83	info.align_offset = 0;
f4ea6dcb AK	84
	85	if (addr > DEFAULT_MAP_WINDOW)
	86	info.high_limit += mm->context.addr_limit - DEFAULT_MAP_WINDOW;
	87
48483760 AK	88	return vm_unmapped_area(&info);
48483760 AK	89	}