Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Ley Foon Tan | 363 | 52.31% | 2 | 15.38% |
Anshuman Khandual | 253 | 36.46% | 1 | 7.69% |
Mike Rapoport | 76 | 10.95% | 9 | 69.23% |
Michel Lespinasse | 2 | 0.29% | 1 | 7.69% |
Total | 694 | 13 |
/* * Copyright (C) 2013 Altera Corporation * Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch> * Copyright (C) 2009 Wind River Systems Inc * Implemented by fredrik.markstrom@gmail.com and ivarholmqvist@gmail.com * Copyright (C) 2004 Microtronix Datacom Ltd * * based on arch/m68k/mm/init.c * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. */ #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/init.h> #include <linux/pagemap.h> #include <linux/memblock.h> #include <linux/slab.h> #include <linux/binfmts.h> #include <linux/execmem.h> #include <asm/setup.h> #include <asm/page.h> #include <asm/sections.h> #include <asm/tlb.h> #include <asm/mmu_context.h> #include <asm/cpuinfo.h> #include <asm/processor.h> pgd_t *pgd_current; /* * paging_init() continues the virtual memory environment setup which * was begun by the code in arch/head.S. * The parameters are pointers to where to stick the starting and ending * addresses of available kernel virtual memory. */ void __init paging_init(void) { unsigned long max_zone_pfn[MAX_NR_ZONES] = { 0 }; pagetable_init(); pgd_current = swapper_pg_dir; max_zone_pfn[ZONE_NORMAL] = max_mapnr; /* pass the memory from the bootmem allocator to the main allocator */ free_area_init(max_zone_pfn); flush_dcache_range((unsigned long)empty_zero_page, (unsigned long)empty_zero_page + PAGE_SIZE); } void __init mem_init(void) { unsigned long end_mem = memory_end; /* this must not include kernel stack at top */ pr_debug("mem_init: start=%lx, end=%lx\n", memory_start, memory_end); end_mem &= PAGE_MASK; high_memory = __va(end_mem); /* this will put all memory onto the freelists */ memblock_free_all(); } void __init mmu_init(void) { flush_tlb_all(); } pgd_t swapper_pg_dir[PTRS_PER_PGD] __aligned(PAGE_SIZE); pte_t invalid_pte_table[PTRS_PER_PTE] __aligned(PAGE_SIZE); static struct page *kuser_page[1]; static int alloc_kuser_page(void) { extern char __kuser_helper_start[], __kuser_helper_end[]; int kuser_sz = __kuser_helper_end - __kuser_helper_start; unsigned long vpage; vpage = get_zeroed_page(GFP_ATOMIC); if (!vpage) return -ENOMEM; /* Copy kuser helpers */ memcpy((void *)vpage, __kuser_helper_start, kuser_sz); flush_icache_range(vpage, vpage + KUSER_SIZE); kuser_page[0] = virt_to_page(vpage); return 0; } arch_initcall(alloc_kuser_page); int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp) { struct mm_struct *mm = current->mm; int ret; mmap_write_lock(mm); /* Map kuser helpers to user space address */ ret = install_special_mapping(mm, KUSER_BASE, KUSER_SIZE, VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYEXEC, kuser_page); mmap_write_unlock(mm); return ret; } const char *arch_vma_name(struct vm_area_struct *vma) { return (vma->vm_start == KUSER_BASE) ? "[kuser]" : NULL; } static const pgprot_t protection_map[16] = { [VM_NONE] = MKP(0, 0, 0), [VM_READ] = MKP(0, 0, 1), [VM_WRITE] = MKP(0, 0, 0), [VM_WRITE | VM_READ] = MKP(0, 0, 1), [VM_EXEC] = MKP(1, 0, 0), [VM_EXEC | VM_READ] = MKP(1, 0, 1), [VM_EXEC | VM_WRITE] = MKP(1, 0, 0), [VM_EXEC | VM_WRITE | VM_READ] = MKP(1, 0, 1), [VM_SHARED] = MKP(0, 0, 0), [VM_SHARED | VM_READ] = MKP(0, 0, 1), [VM_SHARED | VM_WRITE] = MKP(0, 1, 0), [VM_SHARED | VM_WRITE | VM_READ] = MKP(0, 1, 1), [VM_SHARED | VM_EXEC] = MKP(1, 0, 0), [VM_SHARED | VM_EXEC | VM_READ] = MKP(1, 0, 1), [VM_SHARED | VM_EXEC | VM_WRITE] = MKP(1, 1, 0), [VM_SHARED | VM_EXEC | VM_WRITE | VM_READ] = MKP(1, 1, 1) }; DECLARE_VM_GET_PAGE_PROT #ifdef CONFIG_EXECMEM static struct execmem_info execmem_info __ro_after_init; struct execmem_info __init *execmem_arch_setup(void) { execmem_info = (struct execmem_info){ .ranges = { [EXECMEM_DEFAULT] = { .start = MODULES_VADDR, .end = MODULES_END, .pgprot = PAGE_KERNEL_EXEC, .alignment = 1, }, }, }; return &execmem_info; } #endif /* CONFIG_EXECMEM */
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