i386: prepare shared mm/boot_ioremap.c

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 100 deletions

diff --git a/arch/i386/mm/boot_ioremap.c b/arch/i386/mm/boot_ioremap.c
deleted file mode 100644
index 4de95a17a7d..00000000000
--- a/arch/i386/mm/boot_ioremap.c
+++ /dev/null
@@ -1,100 +0,0 @@
-/*
- * arch/i386/mm/boot_ioremap.c
- * 
- * Re-map functions for early boot-time before paging_init() when the 
- * boot-time pagetables are still in use
- *
- * Written by Dave Hansen <haveblue@us.ibm.com>
- */
-
-
-/*
- * We need to use the 2-level pagetable functions, but CONFIG_X86_PAE
- * keeps that from happenning.  If anyone has a better way, I'm listening.
- *
- * boot_pte_t is defined only if this all works correctly
- */
-
-#undef CONFIG_X86_PAE
-#undef CONFIG_PARAVIRT
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/tlbflush.h>
-#include <linux/init.h>
-#include <linux/stddef.h>
-
-/* 
- * I'm cheating here.  It is known that the two boot PTE pages are 
- * allocated next to each other.  I'm pretending that they're just
- * one big array. 
- */
-
-#define BOOT_PTE_PTRS (PTRS_PER_PTE*2)
-
-static unsigned long boot_pte_index(unsigned long vaddr) 
-{
-        return __pa(vaddr) >> PAGE_SHIFT;
-}
-
-static inline boot_pte_t* boot_vaddr_to_pte(void *address)
-{
-        boot_pte_t* boot_pg = (boot_pte_t*)pg0;
-        return &boot_pg[boot_pte_index((unsigned long)address)];
-}
-
-/*
- * This is only for a caller who is clever enough to page-align
- * phys_addr and virtual_source, and who also has a preference
- * about which virtual address from which to steal ptes
- */
-static void __boot_ioremap(unsigned long phys_addr, unsigned long nrpages, 
-                    void* virtual_source)
-{
-        boot_pte_t* pte;
-        int i;
-        char *vaddr = virtual_source;
-
-        pte = boot_vaddr_to_pte(virtual_source);
-        for (i=0; i < nrpages; i++, phys_addr += PAGE_SIZE, pte++) {
-                set_pte(pte, pfn_pte(phys_addr>>PAGE_SHIFT, PAGE_KERNEL));
-                __flush_tlb_one(&vaddr[i*PAGE_SIZE]);
-        }
-}
-
-/* the virtual space we're going to remap comes from this array */
-#define BOOT_IOREMAP_PAGES 4
-#define BOOT_IOREMAP_SIZE (BOOT_IOREMAP_PAGES*PAGE_SIZE)
-static __initdata char boot_ioremap_space[BOOT_IOREMAP_SIZE]
-                       __attribute__ ((aligned (PAGE_SIZE)));
-
-/*
- * This only applies to things which need to ioremap before paging_init()
- * bt_ioremap() and plain ioremap() are both useless at this point.
- * 
- * When used, we're still using the boot-time pagetables, which only
- * have 2 PTE pages mapping the first 8MB
- *
- * There is no unmap.  The boot-time PTE pages aren't used after boot.
- * If you really want the space back, just remap it yourself.
- * boot_ioremap(&ioremap_space-PAGE_OFFSET, BOOT_IOREMAP_SIZE)
- */
-__init void* boot_ioremap(unsigned long phys_addr, unsigned long size)
-{
-        unsigned long last_addr, offset;
-        unsigned int nrpages;
-        
-        last_addr = phys_addr + size - 1;
-
-        /* page align the requested address */
-        offset = phys_addr & ~PAGE_MASK;
-        phys_addr &= PAGE_MASK;
-        size = PAGE_ALIGN(last_addr) - phys_addr;
-        
-        nrpages = size >> PAGE_SHIFT;
-        if (nrpages > BOOT_IOREMAP_PAGES)
-                return NULL;
-        
-        __boot_ioremap(phys_addr, nrpages, boot_ioremap_space);
-
-        return &boot_ioremap_space[offset];
-}