diff options
Diffstat (limited to 'arch/x86/mm')
| -rw-r--r-- | arch/x86/mm/Makefile_32 | 1 | ||||
| -rw-r--r-- | arch/x86/mm/boot_ioremap_32.c | 100 |
2 files changed, 0 insertions, 101 deletions
diff --git a/arch/x86/mm/Makefile_32 b/arch/x86/mm/Makefile_32 index be2f55160bf..1aeba3bf34b 100644 --- a/arch/x86/mm/Makefile_32 +++ b/arch/x86/mm/Makefile_32 @@ -8,4 +8,3 @@ obj-$(CONFIG_CPA_DEBUG) += pageattr-test.o obj-$(CONFIG_NUMA) += discontig_32.o obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o obj-$(CONFIG_HIGHMEM) += highmem_32.o -obj-$(CONFIG_BOOT_IOREMAP) += boot_ioremap_32.o diff --git a/arch/x86/mm/boot_ioremap_32.c b/arch/x86/mm/boot_ioremap_32.c deleted file mode 100644 index 7ede1e3e1f4..00000000000 --- a/arch/x86/mm/boot_ioremap_32.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 happening. 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((unsigned long) &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]; -} |