diff options
| -rw-r--r-- | arch/x86/mm/init_64.c | 52 | ||||
| -rw-r--r-- | arch/x86/mm/ioremap.c | 5 | ||||
| -rw-r--r-- | include/asm-x86/fixmap_64.h | 13 | ||||
| -rw-r--r-- | include/asm-x86/io.h | 13 | ||||
| -rw-r--r-- | include/asm-x86/io_32.h | 12 |
5 files changed, 27 insertions, 68 deletions
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index bfea7605eaa..9b6049133a8 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -257,58 +257,6 @@ static __meminit void unmap_low_page(void *adr) early_iounmap(adr, PAGE_SIZE); } -/* Must run before zap_low_mappings */ -__meminit void *early_ioremap(unsigned long addr, unsigned long size) -{ - pmd_t *pmd, *last_pmd; - unsigned long vaddr; - int i, pmds; - - pmds = ((addr & ~PMD_MASK) + size + ~PMD_MASK) / PMD_SIZE; - vaddr = __START_KERNEL_map; - pmd = level2_kernel_pgt; - last_pmd = level2_kernel_pgt + PTRS_PER_PMD - 1; - - for (; pmd <= last_pmd; pmd++, vaddr += PMD_SIZE) { - for (i = 0; i < pmds; i++) { - if (pmd_present(pmd[i])) - goto continue_outer_loop; - } - vaddr += addr & ~PMD_MASK; - addr &= PMD_MASK; - - for (i = 0; i < pmds; i++, addr += PMD_SIZE) - set_pmd(pmd+i, __pmd(addr | __PAGE_KERNEL_LARGE_EXEC)); - __flush_tlb_all(); - - return (void *)vaddr; -continue_outer_loop: - ; - } - printk(KERN_ERR "early_ioremap(0x%lx, %lu) failed\n", addr, size); - - return NULL; -} - -/* - * To avoid virtual aliases later: - */ -__meminit void early_iounmap(void *addr, unsigned long size) -{ - unsigned long vaddr; - pmd_t *pmd; - int i, pmds; - - vaddr = (unsigned long)addr; - pmds = ((vaddr & ~PMD_MASK) + size + ~PMD_MASK) / PMD_SIZE; - pmd = level2_kernel_pgt + pmd_index(vaddr); - - for (i = 0; i < pmds; i++) - pmd_clear(pmd + i); - - __flush_tlb_all(); -} - static unsigned long __meminit phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end) { diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c index 0561fde56a5..092b3d72498 100644 --- a/arch/x86/mm/ioremap.c +++ b/arch/x86/mm/ioremap.c @@ -381,8 +381,6 @@ void unxlate_dev_mem_ptr(unsigned long phys, void *addr) return; } -#ifdef CONFIG_X86_32 - int __initdata early_ioremap_debug; static int __init early_ioremap_debug_setup(char *str) @@ -483,6 +481,7 @@ static void __init __early_set_fixmap(enum fixed_addresses idx, return; } pte = early_ioremap_pte(addr); + if (pgprot_val(flags)) set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, flags)); else @@ -624,5 +623,3 @@ void __this_fixmap_does_not_exist(void) { WARN_ON(1); } - -#endif /* CONFIG_X86_32 */ diff --git a/include/asm-x86/fixmap_64.h b/include/asm-x86/fixmap_64.h index 626098823a0..c7dcc365f47 100644 --- a/include/asm-x86/fixmap_64.h +++ b/include/asm-x86/fixmap_64.h @@ -49,6 +49,19 @@ enum fixed_addresses { #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT FIX_OHCI1394_BASE, #endif + __end_of_permanent_fixed_addresses, + /* + * 256 temporary boot-time mappings, used by early_ioremap(), + * before ioremap() is functional. + * + * We round it up to the next 512 pages boundary so that we + * can have a single pgd entry and a single pte table: + */ +#define NR_FIX_BTMAPS 64 +#define FIX_BTMAPS_NESTING 4 + FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 512 - + (__end_of_permanent_fixed_addresses & 511), + FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_NESTING - 1, __end_of_fixed_addresses }; diff --git a/include/asm-x86/io.h b/include/asm-x86/io.h index 8e9eca93f9b..c63563df4ac 100644 --- a/include/asm-x86/io.h +++ b/include/asm-x86/io.h @@ -72,4 +72,17 @@ extern int ioremap_change_attr(unsigned long vaddr, unsigned long size, unsigned long prot_val); extern void __iomem *ioremap_wc(unsigned long offset, unsigned long size); +/* + * early_ioremap() and early_iounmap() are for temporary early boot-time + * mappings, before the real ioremap() is functional. + * A boot-time mapping is currently limited to at most 16 pages. + */ +extern void early_ioremap_init(void); +extern void early_ioremap_clear(void); +extern void early_ioremap_reset(void); +extern void *early_ioremap(unsigned long offset, unsigned long size); +extern void early_iounmap(void *addr, unsigned long size); +extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys); + + #endif /* _ASM_X86_IO_H */ diff --git a/include/asm-x86/io_32.h b/include/asm-x86/io_32.h index d71be8df979..4df44ed5407 100644 --- a/include/asm-x86/io_32.h +++ b/include/asm-x86/io_32.h @@ -122,18 +122,6 @@ static inline void __iomem *ioremap(resource_size_t offset, unsigned long size) extern void iounmap(volatile void __iomem *addr); /* - * early_ioremap() and early_iounmap() are for temporary early boot-time - * mappings, before the real ioremap() is functional. - * A boot-time mapping is currently limited to at most 16 pages. - */ -extern void early_ioremap_init(void); -extern void early_ioremap_clear(void); -extern void early_ioremap_reset(void); -extern void *early_ioremap(unsigned long offset, unsigned long size); -extern void early_iounmap(void *addr, unsigned long size); -extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys); - -/* * ISA I/O bus memory addresses are 1:1 with the physical address. */ #define isa_virt_to_bus virt_to_phys |