arch: Remove Itanium (IA-64) architecture

[sfrench/cifs-2.6.git] / arch / ia64 / mm / hugetlbpage.c

diff --git a/arch/ia64/mm/hugetlbpage.c b/arch/ia64/mm/hugetlbpage.c
deleted file mode 100644 (file)
index adc49f2..0000000
--- a/arch/ia64/mm/hugetlbpage.c
+++ /dev/null
@@ -1,186 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * IA-64 Huge TLB Page Support for Kernel.
- *
- * Copyright (C) 2002-2004 Rohit Seth <rohit.seth@intel.com>
- * Copyright (C) 2003-2004 Ken Chen <kenneth.w.chen@intel.com>
- *
- * Sep, 2003: add numa support
- * Feb, 2004: dynamic hugetlb page size via boot parameter
- */
-
-#include <linux/init.h>
-#include <linux/fs.h>
-#include <linux/mm.h>
-#include <linux/hugetlb.h>
-#include <linux/pagemap.h>
-#include <linux/module.h>
-#include <linux/sysctl.h>
-#include <linux/log2.h>
-#include <asm/mman.h>
-#include <asm/tlb.h>
-#include <asm/tlbflush.h>
-
-unsigned int hpage_shift = HPAGE_SHIFT_DEFAULT;
-EXPORT_SYMBOL(hpage_shift);
-
-pte_t *
-huge_pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma,
-              unsigned long addr, unsigned long sz)
-{
-       unsigned long taddr = htlbpage_to_page(addr);
-       pgd_t *pgd;
-       p4d_t *p4d;
-       pud_t *pud;
-       pmd_t *pmd;
-       pte_t *pte = NULL;
-
-       pgd = pgd_offset(mm, taddr);
-       p4d = p4d_offset(pgd, taddr);
-       pud = pud_alloc(mm, p4d, taddr);
-       if (pud) {
-               pmd = pmd_alloc(mm, pud, taddr);
-               if (pmd)
-                       pte = pte_alloc_huge(mm, pmd, taddr);
-       }
-       return pte;
-}
-
-pte_t *
-huge_pte_offset (struct mm_struct *mm, unsigned long addr, unsigned long sz)
-{
-       unsigned long taddr = htlbpage_to_page(addr);
-       pgd_t *pgd;
-       p4d_t *p4d;
-       pud_t *pud;
-       pmd_t *pmd;
-       pte_t *pte = NULL;
-
-       pgd = pgd_offset(mm, taddr);
-       if (pgd_present(*pgd)) {
-               p4d = p4d_offset(pgd, taddr);
-               if (p4d_present(*p4d)) {
-                       pud = pud_offset(p4d, taddr);
-                       if (pud_present(*pud)) {
-                               pmd = pmd_offset(pud, taddr);
-                               if (pmd_present(*pmd))
-                                       pte = pte_offset_huge(pmd, taddr);
-                       }
-               }
-       }
-
-       return pte;
-}
-
-#define mk_pte_huge(entry) { pte_val(entry) |= _PAGE_P; }
-
-/*
- * Don't actually need to do any preparation, but need to make sure
- * the address is in the right region.
- */
-int prepare_hugepage_range(struct file *file,
-                       unsigned long addr, unsigned long len)
-{
-       if (len & ~HPAGE_MASK)
-               return -EINVAL;
-       if (addr & ~HPAGE_MASK)
-               return -EINVAL;
-       if (REGION_NUMBER(addr) != RGN_HPAGE)
-               return -EINVAL;
-
-       return 0;
-}
-
-int pmd_huge(pmd_t pmd)
-{
-       return 0;
-}
-
-int pud_huge(pud_t pud)
-{
-       return 0;
-}
-
-void hugetlb_free_pgd_range(struct mmu_gather *tlb,
-                       unsigned long addr, unsigned long end,
-                       unsigned long floor, unsigned long ceiling)
-{
-       /*
-        * This is called to free hugetlb page tables.
-        *
-        * The offset of these addresses from the base of the hugetlb
-        * region must be scaled down by HPAGE_SIZE/PAGE_SIZE so that
-        * the standard free_pgd_range will free the right page tables.
-        *
-        * If floor and ceiling are also in the hugetlb region, they
-        * must likewise be scaled down; but if outside, left unchanged.
-        */
-
-       addr = htlbpage_to_page(addr);
-       end  = htlbpage_to_page(end);
-       if (REGION_NUMBER(floor) == RGN_HPAGE)
-               floor = htlbpage_to_page(floor);
-       if (REGION_NUMBER(ceiling) == RGN_HPAGE)
-               ceiling = htlbpage_to_page(ceiling);
-
-       free_pgd_range(tlb, addr, end, floor, ceiling);
-}
-
-unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, unsigned long len,
-               unsigned long pgoff, unsigned long flags)
-{
-       struct vm_unmapped_area_info info;
-
-       if (len > RGN_MAP_LIMIT)
-               return -ENOMEM;
-       if (len & ~HPAGE_MASK)
-               return -EINVAL;
-
-       /* Handle MAP_FIXED */
-       if (flags & MAP_FIXED) {
-               if (prepare_hugepage_range(file, addr, len))
-                       return -EINVAL;
-               return addr;
-       }
-
-       /* This code assumes that RGN_HPAGE != 0. */
-       if ((REGION_NUMBER(addr) != RGN_HPAGE) || (addr & (HPAGE_SIZE - 1)))
-               addr = HPAGE_REGION_BASE;
-
-       info.flags = 0;
-       info.length = len;
-       info.low_limit = addr;
-       info.high_limit = HPAGE_REGION_BASE + RGN_MAP_LIMIT;
-       info.align_mask = PAGE_MASK & (HPAGE_SIZE - 1);
-       info.align_offset = 0;
-       return vm_unmapped_area(&info);
-}
-
-static int __init hugetlb_setup_sz(char *str)
-{
-       u64 tr_pages;
-       unsigned long long size;
-
-       if (ia64_pal_vm_page_size(&tr_pages, NULL) != 0)
-               /*
-                * shouldn't happen, but just in case.
-                */
-               tr_pages = 0x15557000UL;
-
-       size = memparse(str, &str);
-       if (*str || !is_power_of_2(size) || !(tr_pages & size) ||
-               size <= PAGE_SIZE ||
-               size > (1UL << PAGE_SHIFT << MAX_ORDER)) {
-               printk(KERN_WARNING "Invalid huge page size specified\n");
-               return 1;
-       }
-
-       hpage_shift = __ffs(size);
-       /*
-        * boot cpu already executed ia64_mmu_init, and has HPAGE_SHIFT_DEFAULT
-        * override here with new page shift.
-        */
-       ia64_set_rr(HPAGE_REGION_BASE, hpage_shift << 2);
-       return 0;
-}
-early_param("hugepagesz", hugetlb_setup_sz);