arm64: add early_ioremap support

[linux-2.6-block.git] / arch / arm64 / mm / mmu.c

diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index ba259a0e385ebad9bfcadb050f8ba4c8c6420f43..6b7e89569a3a9ff8518e7c6ee856603f1e9fb93b 100644 (file)
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -260,47 +260,6 @@ static void __init create_mapping(phys_addr_t phys, unsigned long virt,
        } while (pgd++, addr = next, addr != end);
 }
 
-#ifdef CONFIG_EARLY_PRINTK
-/*
- * Create an early I/O mapping using the pgd/pmd entries already populated
- * in head.S as this function is called too early to allocated any memory. The
- * mapping size is 2MB with 4KB pages or 64KB or 64KB pages.
- */
-void __iomem * __init early_io_map(phys_addr_t phys, unsigned long virt)
-{
-       unsigned long size, mask;
-       bool page64k = IS_ENABLED(CONFIG_ARM64_64K_PAGES);
-       pgd_t *pgd;
-       pud_t *pud;
-       pmd_t *pmd;
-       pte_t *pte;
-
-       /*
-        * No early pte entries with !ARM64_64K_PAGES configuration, so using
-        * sections (pmd).
-        */
-       size = page64k ? PAGE_SIZE : SECTION_SIZE;
-       mask = ~(size - 1);
-
-       pgd = pgd_offset_k(virt);
-       pud = pud_offset(pgd, virt);
-       if (pud_none(*pud))
-               return NULL;
-       pmd = pmd_offset(pud, virt);
-
-       if (page64k) {
-               if (pmd_none(*pmd))
-                       return NULL;
-               pte = pte_offset_kernel(pmd, virt);
-               set_pte(pte, __pte((phys & mask) | PROT_DEVICE_nGnRE));
-       } else {
-               set_pmd(pmd, __pmd((phys & mask) | PROT_SECT_DEVICE_nGnRE));
-       }
-
-       return (void __iomem *)((virt & mask) + (phys & ~mask));
-}
-#endif
-
 static void __init map_mem(void)
 {
        struct memblock_region *reg;