/*
* arch/i386/mm/boot_ioremap.c
- *
- * Re-map functions for early boot-time before paging_init() when the
+ *
+ * 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>
#include <linux/init.h>
#include <linux/stddef.h>
-/*
- * I'm cheating here. It is known that the two boot PTE pages are
+/*
+ * 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.
+ * one big array.
*/
#define BOOT_PTE_PTRS (PTRS_PER_PTE*2)
-static unsigned long boot_pte_index(unsigned long vaddr)
+static unsigned long boot_pte_index(unsigned long vaddr)
{
return __pa(vaddr) >> PAGE_SHIFT;
}
* 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,
+static void __boot_ioremap(unsigned long phys_addr, unsigned long nrpages,
void* virtual_source)
{
boot_pte_t* pte;
/*
* 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
*
{
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];