| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Michal Simek | 627 | 75.72% | 17 | 58.62% |
| Anshuman Khandual | 141 | 17.03% | 1 | 3.45% |
| Mike Rapoport | 33 | 3.99% | 3 | 10.34% |
| Randy Dunlap | 10 | 1.21% | 1 | 3.45% |
| Yinghai Lu | 6 | 0.72% | 1 | 3.45% |
| Paul Gortmaker | 3 | 0.36% | 1 | 3.45% |
| Thomas Gleixner | 3 | 0.36% | 1 | 3.45% |
| Linus Torvalds (pre-git) | 2 | 0.24% | 1 | 3.45% |
| Christoph Hellwig | 1 | 0.12% | 1 | 3.45% |
| Wei Yang | 1 | 0.12% | 1 | 3.45% |
| Linus Torvalds | 1 | 0.12% | 1 | 3.45% |
| Total | 828 | 29 |
/* * Copyright (C) 2007-2008 Michal Simek <monstr@monstr.eu> * Copyright (C) 2006 Atmark Techno, Inc. * * 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/dma-map-ops.h> #include <linux/memblock.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/mm.h> /* mem_init */ #include <linux/initrd.h> #include <linux/of_fdt.h> #include <linux/pagemap.h> #include <linux/pfn.h> #include <linux/slab.h> #include <linux/swap.h> #include <linux/export.h> #include <asm/page.h> #include <asm/mmu_context.h> #include <asm/pgalloc.h> #include <asm/sections.h> #include <asm/tlb.h> #include <asm/fixmap.h> /* Use for MMU and noMMU because of PCI generic code */ int mem_init_done; char *klimit = _end; /* * Initialize the bootmem system and give it all the memory we * have available. */ unsigned long memory_start; EXPORT_SYMBOL(memory_start); unsigned long memory_size; EXPORT_SYMBOL(memory_size); unsigned long lowmem_size; EXPORT_SYMBOL(min_low_pfn); EXPORT_SYMBOL(max_low_pfn); #ifdef CONFIG_HIGHMEM static void __init highmem_init(void) { pr_debug("%x\n", (u32)PKMAP_BASE); map_page(PKMAP_BASE, 0, 0); /* XXX gross */ pkmap_page_table = virt_to_kpte(PKMAP_BASE); } #endif /* CONFIG_HIGHMEM */ void __init arch_zone_limits_init(unsigned long *max_zone_pfns) { #ifdef CONFIG_HIGHMEM max_zone_pfns[ZONE_DMA] = max_low_pfn; max_zone_pfns[ZONE_HIGHMEM] = max_pfn; #else max_zone_pfns[ZONE_DMA] = max_pfn; #endif } /* * paging_init() sets up the page tables - in fact we've already done this. */ static void __init paging_init(void) { int idx; /* Setup fixmaps */ for (idx = 0; idx < __end_of_fixed_addresses; idx++) clear_fixmap(idx); #ifdef CONFIG_HIGHMEM highmem_init(); #endif } void __init setup_memory(void) { /* * Kernel: * start: base phys address of kernel - page align * end: base phys address of kernel - page align * * min_low_pfn - the first page (mm/bootmem.c - node_boot_start) * max_low_pfn */ /* memory start is from the kernel end (aligned) to higher addr */ min_low_pfn = memory_start >> PAGE_SHIFT; /* minimum for allocation */ max_low_pfn = ((u64)memory_start + (u64)lowmem_size) >> PAGE_SHIFT; max_pfn = ((u64)memory_start + (u64)memory_size) >> PAGE_SHIFT; pr_info("%s: min_low_pfn: %#lx\n", __func__, min_low_pfn); pr_info("%s: max_low_pfn: %#lx\n", __func__, max_low_pfn); pr_info("%s: max_pfn: %#lx\n", __func__, max_pfn); paging_init(); } void __init mem_init(void) { mem_init_done = 1; } int page_is_ram(unsigned long pfn) { return pfn < max_low_pfn; } /* * Check for command-line options that affect what MMU_init will do. */ static void __init mm_cmdline_setup(void) { unsigned long maxmem = 0; char *p = cmd_line; /* Look for mem= option on command line */ p = strstr(cmd_line, "mem="); if (p) { p += 4; maxmem = memparse(p, &p); if (maxmem && memory_size > maxmem) { memory_size = maxmem; memblock.memory.regions[0].size = memory_size; } } } /* * MMU_init_hw does the chip-specific initialization of the MMU hardware. */ static void __init mmu_init_hw(void) { /* * The Zone Protection Register (ZPR) defines how protection will * be applied to every page which is a member of a given zone. At * present, we utilize only two of the zones. * The zone index bits (of ZSEL) in the PTE are used for software * indicators, except the LSB. For user access, zone 1 is used, * for kernel access, zone 0 is used. We set all but zone 1 * to zero, allowing only kernel access as indicated in the PTE. * For zone 1, we set a 01 binary (a value of 10 will not work) * to allow user access as indicated in the PTE. This also allows * kernel access as indicated in the PTE. */ __asm__ __volatile__ ("ori r11, r0, 0x10000000;" \ "mts rzpr, r11;" : : : "r11"); } /* * MMU_init sets up the basic memory mappings for the kernel, * including both RAM and possibly some I/O regions, * and sets up the page tables and the MMU hardware ready to go. */ /* called from head.S */ asmlinkage void __init mmu_init(void) { unsigned int kstart, ksize; if ((u32) memblock.memory.regions[0].size < 0x400000) { pr_emerg("Memory must be greater than 4MB\n"); machine_restart(NULL); } if ((u32) memblock.memory.regions[0].size < kernel_tlb) { pr_emerg("Kernel size is greater than memory node\n"); machine_restart(NULL); } /* Find main memory where the kernel is */ memory_start = (u32) memblock.memory.regions[0].base; lowmem_size = memory_size = (u32) memblock.memory.regions[0].size; if (lowmem_size > CONFIG_LOWMEM_SIZE) { lowmem_size = CONFIG_LOWMEM_SIZE; #ifndef CONFIG_HIGHMEM memory_size = lowmem_size; #endif } mm_cmdline_setup(); /* FIXME parse args from command line - not used */ /* * Map out the kernel text/data/bss from the available physical * memory. */ kstart = __pa(CONFIG_KERNEL_START); /* kernel start */ /* kernel size */ ksize = PAGE_ALIGN(((u32)_end - (u32)CONFIG_KERNEL_START)); memblock_reserve(kstart, ksize); #if defined(CONFIG_BLK_DEV_INITRD) /* Remove the init RAM disk from the available memory. */ if (initrd_start) { unsigned long size; size = initrd_end - initrd_start; memblock_reserve(__virt_to_phys(initrd_start), size); } #endif /* CONFIG_BLK_DEV_INITRD */ /* Initialize the MMU hardware */ mmu_init_hw(); /* Map in all of RAM starting at CONFIG_KERNEL_START */ mapin_ram(); /* Extend vmalloc and ioremap area as big as possible */ #ifdef CONFIG_HIGHMEM ioremap_base = ioremap_bot = PKMAP_BASE; #else ioremap_base = ioremap_bot = FIXADDR_START; #endif /* Initialize the context management stuff */ mmu_context_init(); /* Shortly after that, the entire linear mapping will be available */ /* This will also cause that unflatten device tree will be allocated * inside 768MB limit */ memblock_set_current_limit(memory_start + lowmem_size - 1); parse_early_param(); early_init_fdt_scan_reserved_mem(); /* CMA initialization */ dma_contiguous_reserve(memory_start + lowmem_size - 1); memblock_dump_all(); } static const pgprot_t protection_map[16] = { [VM_NONE] = PAGE_NONE, [VM_READ] = PAGE_READONLY_X, [VM_WRITE] = PAGE_COPY, [VM_WRITE | VM_READ] = PAGE_COPY_X, [VM_EXEC] = PAGE_READONLY, [VM_EXEC | VM_READ] = PAGE_READONLY_X, [VM_EXEC | VM_WRITE] = PAGE_COPY, [VM_EXEC | VM_WRITE | VM_READ] = PAGE_COPY_X, [VM_SHARED] = PAGE_NONE, [VM_SHARED | VM_READ] = PAGE_READONLY_X, [VM_SHARED | VM_WRITE] = PAGE_SHARED, [VM_SHARED | VM_WRITE | VM_READ] = PAGE_SHARED_X, [VM_SHARED | VM_EXEC] = PAGE_READONLY, [VM_SHARED | VM_EXEC | VM_READ] = PAGE_READONLY_X, [VM_SHARED | VM_EXEC | VM_WRITE] = PAGE_SHARED, [VM_SHARED | VM_EXEC | VM_WRITE | VM_READ] = PAGE_SHARED_X }; DECLARE_VM_GET_PAGE_PROT