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#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>
void radix__flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
{
unsigned long ap, shift;
struct hstate *hstate = hstate_file(vma->vm_file);
shift = huge_page_shift(hstate);
if (shift == mmu_psize_defs[MMU_PAGE_2M].shift)
ap = mmu_get_ap(MMU_PAGE_2M);
else if (shift == mmu_psize_defs[MMU_PAGE_1G].shift)
ap = mmu_get_ap(MMU_PAGE_1G);
else {
WARN(1, "Wrong huge page shift\n");
return ;
}
radix___flush_tlb_page(vma->vm_mm, vmaddr, ap, 0);
}
void radix__local_flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
{
unsigned long ap, shift;
struct hstate *hstate = hstate_file(vma->vm_file);
shift = huge_page_shift(hstate);
if (shift == mmu_psize_defs[MMU_PAGE_2M].shift)
ap = mmu_get_ap(MMU_PAGE_2M);
else if (shift == mmu_psize_defs[MMU_PAGE_1G].shift)
ap = mmu_get_ap(MMU_PAGE_1G);
else {
WARN(1, "Wrong huge page shift\n");
return ;
}
radix___local_flush_tlb_page(vma->vm_mm, vmaddr, ap, 0);
}
/*
* 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 (len & ~huge_page_mask(h))
return -EINVAL;
if (len > 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 (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;
return vm_unmapped_area(&info);
}
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