diff options
Diffstat (limited to 'arch/mn10300/mm/init.c')
| -rw-r--r-- | arch/mn10300/mm/init.c | 83 |
1 files changed, 30 insertions, 53 deletions
diff --git a/arch/mn10300/mm/init.c b/arch/mn10300/mm/init.c index dd27a9a3515..97a1ec0beee 100644 --- a/arch/mn10300/mm/init.c +++ b/arch/mn10300/mm/init.c @@ -17,7 +17,6 @@ #include <linux/types.h> #include <linux/ptrace.h> #include <linux/mman.h> -#include <linux/slab.h> #include <linux/fs.h> #include <linux/mm.h> #include <linux/swap.h> @@ -27,9 +26,9 @@ #include <linux/highmem.h> #include <linux/pagemap.h> #include <linux/bootmem.h> +#include <linux/gfp.h> #include <asm/processor.h> -#include <asm/system.h> #include <asm/uaccess.h> #include <asm/pgtable.h> #include <asm/pgalloc.h> @@ -37,10 +36,12 @@ #include <asm/tlb.h> #include <asm/sections.h> -DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); - unsigned long highstart_pfn, highend_pfn; +#ifdef CONFIG_MN10300_HAS_ATOMIC_OPS_UNIT +static struct vm_struct user_iomap_vm; +#endif + /* * set up paging */ @@ -73,7 +74,24 @@ void __init paging_init(void) /* pass the memory from the bootmem allocator to the main allocator */ free_area_init(zones_size); - __flush_tlb_all(); +#ifdef CONFIG_MN10300_HAS_ATOMIC_OPS_UNIT + /* The Atomic Operation Unit registers need to be mapped to userspace + * for all processes. The following uses vm_area_register_early() to + * reserve the first page of the vmalloc area and sets the pte for that + * page. + * + * glibc hardcodes this virtual mapping, so we're pretty much stuck with + * it from now on. + */ + user_iomap_vm.flags = VM_USERMAP; + user_iomap_vm.size = 1 << PAGE_SHIFT; + vm_area_register_early(&user_iomap_vm, PAGE_SIZE); + ppte = kernel_vmalloc_ptes; + set_pte(ppte, pfn_pte(USER_ATOMIC_OPS_PAGE_ADDR >> PAGE_SHIFT, + PAGE_USERIO)); +#endif + + local_flush_tlb_all(); } /* @@ -81,61 +99,21 @@ void __init paging_init(void) */ void __init mem_init(void) { - int codesize, reservedpages, datasize, initsize; - int tmp; - - if (!mem_map) - BUG(); + BUG_ON(!mem_map); #define START_PFN (contig_page_data.bdata->node_min_pfn) #define MAX_LOW_PFN (contig_page_data.bdata->node_low_pfn) - max_mapnr = num_physpages = MAX_LOW_PFN - START_PFN; + max_mapnr = MAX_LOW_PFN - START_PFN; high_memory = (void *) __va(MAX_LOW_PFN * PAGE_SIZE); /* clear the zero-page */ memset(empty_zero_page, 0, PAGE_SIZE); /* this will put all low memory onto the freelists */ - totalram_pages += free_all_bootmem(); - - reservedpages = 0; - for (tmp = 0; tmp < num_physpages; tmp++) - if (PageReserved(&mem_map[tmp])) - reservedpages++; - - codesize = (unsigned long) &_etext - (unsigned long) &_stext; - datasize = (unsigned long) &_edata - (unsigned long) &_etext; - initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin; - - printk(KERN_INFO - "Memory: %luk/%luk available" - " (%dk kernel code, %dk reserved, %dk data, %dk init," - " %ldk highmem)\n", - nr_free_pages() << (PAGE_SHIFT - 10), - max_mapnr << (PAGE_SHIFT - 10), - codesize >> 10, - reservedpages << (PAGE_SHIFT - 10), - datasize >> 10, - initsize >> 10, - totalhigh_pages << (PAGE_SHIFT - 10)); -} + free_all_bootmem(); -/* - * - */ -void free_init_pages(char *what, unsigned long begin, unsigned long end) -{ - unsigned long addr; - - for (addr = begin; addr < end; addr += PAGE_SIZE) { - ClearPageReserved(virt_to_page(addr)); - init_page_count(virt_to_page(addr)); - memset((void *) addr, 0xcc, PAGE_SIZE); - free_page(addr); - totalram_pages++; - } - printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10); + mem_init_print_info(NULL); } /* @@ -143,9 +121,7 @@ void free_init_pages(char *what, unsigned long begin, unsigned long end) */ void free_initmem(void) { - free_init_pages("unused kernel memory", - (unsigned long) &__init_begin, - (unsigned long) &__init_end); + free_initmem_default(POISON_FREE_INITMEM); } /* @@ -154,6 +130,7 @@ void free_initmem(void) #ifdef CONFIG_BLK_DEV_INITRD void free_initrd_mem(unsigned long start, unsigned long end) { - free_init_pages("initrd memory", start, end); + free_reserved_area((void *)start, (void *)end, POISON_FREE_INITMEM, + "initrd"); } #endif |