diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/s390/mm/init.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/s390/mm/init.c | 262 |
1 files changed, 0 insertions, 262 deletions
diff --git a/ANDROID_3.4.5/arch/s390/mm/init.c b/ANDROID_3.4.5/arch/s390/mm/init.c deleted file mode 100644 index 2bea0605..00000000 --- a/ANDROID_3.4.5/arch/s390/mm/init.c +++ /dev/null @@ -1,262 +0,0 @@ -/* - * arch/s390/mm/init.c - * - * S390 version - * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation - * Author(s): Hartmut Penner (hp@de.ibm.com) - * - * Derived from "arch/i386/mm/init.c" - * Copyright (C) 1995 Linus Torvalds - */ - -#include <linux/signal.h> -#include <linux/sched.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/string.h> -#include <linux/types.h> -#include <linux/ptrace.h> -#include <linux/mman.h> -#include <linux/mm.h> -#include <linux/swap.h> -#include <linux/smp.h> -#include <linux/init.h> -#include <linux/pagemap.h> -#include <linux/bootmem.h> -#include <linux/pfn.h> -#include <linux/poison.h> -#include <linux/initrd.h> -#include <linux/export.h> -#include <linux/gfp.h> -#include <asm/processor.h> -#include <asm/uaccess.h> -#include <asm/pgtable.h> -#include <asm/pgalloc.h> -#include <asm/dma.h> -#include <asm/lowcore.h> -#include <asm/tlb.h> -#include <asm/tlbflush.h> -#include <asm/sections.h> -#include <asm/ctl_reg.h> - -pgd_t swapper_pg_dir[PTRS_PER_PGD] __attribute__((__aligned__(PAGE_SIZE))); - -unsigned long empty_zero_page, zero_page_mask; -EXPORT_SYMBOL(empty_zero_page); - -static unsigned long setup_zero_pages(void) -{ - struct cpuid cpu_id; - unsigned int order; - unsigned long size; - struct page *page; - int i; - - get_cpu_id(&cpu_id); - switch (cpu_id.machine) { - case 0x9672: /* g5 */ - case 0x2064: /* z900 */ - case 0x2066: /* z900 */ - case 0x2084: /* z990 */ - case 0x2086: /* z990 */ - case 0x2094: /* z9-109 */ - case 0x2096: /* z9-109 */ - order = 0; - break; - case 0x2097: /* z10 */ - case 0x2098: /* z10 */ - default: - order = 2; - break; - } - - empty_zero_page = __get_free_pages(GFP_KERNEL | __GFP_ZERO, order); - if (!empty_zero_page) - panic("Out of memory in setup_zero_pages"); - - page = virt_to_page((void *) empty_zero_page); - split_page(page, order); - for (i = 1 << order; i > 0; i--) { - SetPageReserved(page); - page++; - } - - size = PAGE_SIZE << order; - zero_page_mask = (size - 1) & PAGE_MASK; - - return 1UL << order; -} - -/* - * paging_init() sets up the page tables - */ -void __init paging_init(void) -{ - unsigned long max_zone_pfns[MAX_NR_ZONES]; - unsigned long pgd_type, asce_bits; - - init_mm.pgd = swapper_pg_dir; -#ifdef CONFIG_64BIT - if (VMALLOC_END > (1UL << 42)) { - asce_bits = _ASCE_TYPE_REGION2 | _ASCE_TABLE_LENGTH; - pgd_type = _REGION2_ENTRY_EMPTY; - } else { - asce_bits = _ASCE_TYPE_REGION3 | _ASCE_TABLE_LENGTH; - pgd_type = _REGION3_ENTRY_EMPTY; - } -#else - asce_bits = _ASCE_TABLE_LENGTH; - pgd_type = _SEGMENT_ENTRY_EMPTY; -#endif - S390_lowcore.kernel_asce = (__pa(init_mm.pgd) & PAGE_MASK) | asce_bits; - clear_table((unsigned long *) init_mm.pgd, pgd_type, - sizeof(unsigned long)*2048); - vmem_map_init(); - - /* enable virtual mapping in kernel mode */ - __ctl_load(S390_lowcore.kernel_asce, 1, 1); - __ctl_load(S390_lowcore.kernel_asce, 7, 7); - __ctl_load(S390_lowcore.kernel_asce, 13, 13); - arch_local_irq_restore(4UL << (BITS_PER_LONG - 8)); - - atomic_set(&init_mm.context.attach_count, 1); - - sparse_memory_present_with_active_regions(MAX_NUMNODES); - sparse_init(); - memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); - max_zone_pfns[ZONE_DMA] = PFN_DOWN(MAX_DMA_ADDRESS); - max_zone_pfns[ZONE_NORMAL] = max_low_pfn; - free_area_init_nodes(max_zone_pfns); - fault_init(); -} - -void __init mem_init(void) -{ - unsigned long codesize, reservedpages, datasize, initsize; - - max_mapnr = num_physpages = max_low_pfn; - high_memory = (void *) __va(max_low_pfn * PAGE_SIZE); - - /* Setup guest page hinting */ - cmma_init(); - - /* this will put all low memory onto the freelists */ - totalram_pages += free_all_bootmem(); - totalram_pages -= setup_zero_pages(); /* Setup zeroed pages. */ - - reservedpages = 0; - - codesize = (unsigned long) &_etext - (unsigned long) &_text; - datasize = (unsigned long) &_edata - (unsigned long) &_etext; - initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin; - printk("Memory: %luk/%luk available (%ldk kernel code, %ldk reserved, %ldk data, %ldk init)\n", - nr_free_pages() << (PAGE_SHIFT-10), - max_mapnr << (PAGE_SHIFT-10), - codesize >> 10, - reservedpages << (PAGE_SHIFT-10), - datasize >>10, - initsize >> 10); - printk("Write protected kernel read-only data: %#lx - %#lx\n", - (unsigned long)&_stext, - PFN_ALIGN((unsigned long)&_eshared) - 1); -} - -#ifdef CONFIG_DEBUG_PAGEALLOC -void kernel_map_pages(struct page *page, int numpages, int enable) -{ - pgd_t *pgd; - pud_t *pud; - pmd_t *pmd; - pte_t *pte; - unsigned long address; - int i; - - for (i = 0; i < numpages; i++) { - address = page_to_phys(page + i); - pgd = pgd_offset_k(address); - pud = pud_offset(pgd, address); - pmd = pmd_offset(pud, address); - pte = pte_offset_kernel(pmd, address); - if (!enable) { - __ptep_ipte(address, pte); - pte_val(*pte) = _PAGE_TYPE_EMPTY; - continue; - } - *pte = mk_pte_phys(address, __pgprot(_PAGE_TYPE_RW)); - /* Flush cpu write queue. */ - mb(); - } -} -#endif - -void free_init_pages(char *what, unsigned long begin, unsigned long end) -{ - unsigned long addr = begin; - - if (begin >= end) - return; - for (; addr < end; addr += PAGE_SIZE) { - ClearPageReserved(virt_to_page(addr)); - init_page_count(virt_to_page(addr)); - memset((void *)(addr & PAGE_MASK), POISON_FREE_INITMEM, - PAGE_SIZE); - free_page(addr); - totalram_pages++; - } - printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10); -} - -void free_initmem(void) -{ - free_init_pages("unused kernel memory", - (unsigned long)&__init_begin, - (unsigned long)&__init_end); -} - -#ifdef CONFIG_BLK_DEV_INITRD -void free_initrd_mem(unsigned long start, unsigned long end) -{ - free_init_pages("initrd memory", start, end); -} -#endif - -#ifdef CONFIG_MEMORY_HOTPLUG -int arch_add_memory(int nid, u64 start, u64 size) -{ - unsigned long zone_start_pfn, zone_end_pfn, nr_pages; - unsigned long start_pfn = PFN_DOWN(start); - unsigned long size_pages = PFN_DOWN(size); - struct zone *zone; - int rc; - - rc = vmem_add_mapping(start, size); - if (rc) - return rc; - for_each_zone(zone) { - if (zone_idx(zone) != ZONE_MOVABLE) { - /* Add range within existing zone limits */ - zone_start_pfn = zone->zone_start_pfn; - zone_end_pfn = zone->zone_start_pfn + - zone->spanned_pages; - } else { - /* Add remaining range to ZONE_MOVABLE */ - zone_start_pfn = start_pfn; - zone_end_pfn = start_pfn + size_pages; - } - if (start_pfn < zone_start_pfn || start_pfn >= zone_end_pfn) - continue; - nr_pages = (start_pfn + size_pages > zone_end_pfn) ? - zone_end_pfn - start_pfn : size_pages; - rc = __add_pages(nid, zone, start_pfn, nr_pages); - if (rc) - break; - start_pfn += nr_pages; - size_pages -= nr_pages; - if (!size_pages) - break; - } - if (rc) - vmem_remove_mapping(start, size); - return rc; -} -#endif /* CONFIG_MEMORY_HOTPLUG */ |