diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/microblaze/mm/init.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/microblaze/mm/init.c | 502 |
1 files changed, 0 insertions, 502 deletions
diff --git a/ANDROID_3.4.5/arch/microblaze/mm/init.c b/ANDROID_3.4.5/arch/microblaze/mm/init.c deleted file mode 100644 index ce808230..00000000 --- a/ANDROID_3.4.5/arch/microblaze/mm/init.c +++ /dev/null @@ -1,502 +0,0 @@ -/* - * 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/bootmem.h> -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/memblock.h> -#include <linux/mm.h> /* mem_init */ -#include <linux/initrd.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; - -#ifndef CONFIG_MMU -unsigned int __page_offset; -EXPORT_SYMBOL(__page_offset); - -#else -static int init_bootmem_done; -#endif /* CONFIG_MMU */ - -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; - -#ifdef CONFIG_HIGHMEM -pte_t *kmap_pte; -EXPORT_SYMBOL(kmap_pte); -pgprot_t kmap_prot; -EXPORT_SYMBOL(kmap_prot); - -static inline pte_t *virt_to_kpte(unsigned long vaddr) -{ - return pte_offset_kernel(pmd_offset(pgd_offset_k(vaddr), - vaddr), vaddr); -} - -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); - - kmap_pte = virt_to_kpte(__fix_to_virt(FIX_KMAP_BEGIN)); - kmap_prot = PAGE_KERNEL; -} - -static unsigned long highmem_setup(void) -{ - unsigned long pfn; - unsigned long reservedpages = 0; - - for (pfn = max_low_pfn; pfn < max_pfn; ++pfn) { - struct page *page = pfn_to_page(pfn); - - /* FIXME not sure about */ - if (memblock_is_reserved(pfn << PAGE_SHIFT)) - continue; - ClearPageReserved(page); - init_page_count(page); - __free_page(page); - totalhigh_pages++; - reservedpages++; - } - totalram_pages += totalhigh_pages; - printk(KERN_INFO "High memory: %luk\n", - totalhigh_pages << (PAGE_SHIFT-10)); - - return reservedpages; -} -#endif /* CONFIG_HIGHMEM */ - -/* - * paging_init() sets up the page tables - in fact we've already done this. - */ -static void __init paging_init(void) -{ - unsigned long zones_size[MAX_NR_ZONES]; -#ifdef CONFIG_MMU - int idx; - - /* Setup fixmaps */ - for (idx = 0; idx < __end_of_fixed_addresses; idx++) - clear_fixmap(idx); -#endif - - /* Clean every zones */ - memset(zones_size, 0, sizeof(zones_size)); - -#ifdef CONFIG_HIGHMEM - highmem_init(); - - zones_size[ZONE_DMA] = max_low_pfn; - zones_size[ZONE_HIGHMEM] = max_pfn; -#else - zones_size[ZONE_DMA] = max_pfn; -#endif - - /* We don't have holes in memory map */ - free_area_init_nodes(zones_size); -} - -void __init setup_memory(void) -{ - unsigned long map_size; - struct memblock_region *reg; - -#ifndef CONFIG_MMU - u32 kernel_align_start, kernel_align_size; - - /* Find main memory where is the kernel */ - for_each_memblock(memory, reg) { - memory_start = (u32)reg->base; - lowmem_size = reg->size; - if ((memory_start <= (u32)_text) && - ((u32)_text <= (memory_start + lowmem_size - 1))) { - memory_size = lowmem_size; - PAGE_OFFSET = memory_start; - printk(KERN_INFO "%s: Main mem: 0x%x, " - "size 0x%08x\n", __func__, (u32) memory_start, - (u32) memory_size); - break; - } - } - - if (!memory_start || !memory_size) { - panic("%s: Missing memory setting 0x%08x, size=0x%08x\n", - __func__, (u32) memory_start, (u32) memory_size); - } - - /* reservation of region where is the kernel */ - kernel_align_start = PAGE_DOWN((u32)_text); - /* ALIGN can be remove because _end in vmlinux.lds.S is align */ - kernel_align_size = PAGE_UP((u32)klimit) - kernel_align_start; - printk(KERN_INFO "%s: kernel addr:0x%08x-0x%08x size=0x%08x\n", - __func__, kernel_align_start, kernel_align_start - + kernel_align_size, kernel_align_size); - memblock_reserve(kernel_align_start, kernel_align_size); -#endif - /* - * 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 - * max_mapnr - the first unused page (mm/bootmem.c - node_low_pfn) - * num_physpages - number of all pages - */ - - /* memory start is from the kernel end (aligned) to higher addr */ - min_low_pfn = memory_start >> PAGE_SHIFT; /* minimum for allocation */ - /* RAM is assumed contiguous */ - num_physpages = max_mapnr = memory_size >> PAGE_SHIFT; - max_low_pfn = ((u64)memory_start + (u64)lowmem_size) >> PAGE_SHIFT; - max_pfn = ((u64)memory_start + (u64)memory_size) >> PAGE_SHIFT; - - printk(KERN_INFO "%s: max_mapnr: %#lx\n", __func__, max_mapnr); - printk(KERN_INFO "%s: min_low_pfn: %#lx\n", __func__, min_low_pfn); - printk(KERN_INFO "%s: max_low_pfn: %#lx\n", __func__, max_low_pfn); - printk(KERN_INFO "%s: max_pfn: %#lx\n", __func__, max_pfn); - - /* - * Find an area to use for the bootmem bitmap. - * We look for the first area which is at least - * 128kB in length (128kB is enough for a bitmap - * for 4GB of memory, using 4kB pages), plus 1 page - * (in case the address isn't page-aligned). - */ - map_size = init_bootmem_node(NODE_DATA(0), - PFN_UP(TOPHYS((u32)klimit)), min_low_pfn, max_low_pfn); - memblock_reserve(PFN_UP(TOPHYS((u32)klimit)) << PAGE_SHIFT, map_size); - - /* Add active regions with valid PFNs */ - for_each_memblock(memory, reg) { - unsigned long start_pfn, end_pfn; - - start_pfn = memblock_region_memory_base_pfn(reg); - end_pfn = memblock_region_memory_end_pfn(reg); - memblock_set_node(start_pfn << PAGE_SHIFT, - (end_pfn - start_pfn) << PAGE_SHIFT, 0); - } - - /* free bootmem is whole main memory */ - free_bootmem_with_active_regions(0, max_low_pfn); - - /* reserve allocate blocks */ - for_each_memblock(reserved, reg) { - unsigned long top = reg->base + reg->size - 1; - - pr_debug("reserved - 0x%08x-0x%08x, %lx, %lx\n", - (u32) reg->base, (u32) reg->size, top, - memory_start + lowmem_size - 1); - - if (top <= (memory_start + lowmem_size - 1)) { - reserve_bootmem(reg->base, reg->size, BOOTMEM_DEFAULT); - } else if (reg->base < (memory_start + lowmem_size - 1)) { - unsigned long trunc_size = memory_start + lowmem_size - - reg->base; - reserve_bootmem(reg->base, trunc_size, BOOTMEM_DEFAULT); - } - } - - /* XXX need to clip this if using highmem? */ - sparse_memory_present_with_active_regions(0); - -#ifdef CONFIG_MMU - init_bootmem_done = 1; -#endif - paging_init(); -} - -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)); - free_page(addr); - totalram_pages++; - } - printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10); -} - -#ifdef CONFIG_BLK_DEV_INITRD -void free_initrd_mem(unsigned long start, unsigned long end) -{ - int pages = 0; - for (; start < end; start += PAGE_SIZE) { - ClearPageReserved(virt_to_page(start)); - init_page_count(virt_to_page(start)); - free_page(start); - totalram_pages++; - pages++; - } - printk(KERN_NOTICE "Freeing initrd memory: %dk freed\n", - (int)(pages * (PAGE_SIZE / 1024))); -} -#endif - -void free_initmem(void) -{ - free_init_pages("unused kernel memory", - (unsigned long)(&__init_begin), - (unsigned long)(&__init_end)); -} - -void __init mem_init(void) -{ - pg_data_t *pgdat; - unsigned long reservedpages = 0, codesize, initsize, datasize, bsssize; - - high_memory = (void *)__va(memory_start + lowmem_size - 1); - - /* this will put all memory onto the freelists */ - totalram_pages += free_all_bootmem(); - - for_each_online_pgdat(pgdat) { - unsigned long i; - struct page *page; - - for (i = 0; i < pgdat->node_spanned_pages; i++) { - if (!pfn_valid(pgdat->node_start_pfn + i)) - continue; - page = pgdat_page_nr(pgdat, i); - if (PageReserved(page)) - reservedpages++; - } - } - -#ifdef CONFIG_HIGHMEM - reservedpages -= highmem_setup(); -#endif - - codesize = (unsigned long)&_sdata - (unsigned long)&_stext; - datasize = (unsigned long)&_edata - (unsigned long)&_sdata; - initsize = (unsigned long)&__init_end - (unsigned long)&__init_begin; - bsssize = (unsigned long)&__bss_stop - (unsigned long)&__bss_start; - - pr_info("Memory: %luk/%luk available (%luk kernel code, " - "%luk reserved, %luk data, %luk bss, %luk init)\n", - nr_free_pages() << (PAGE_SHIFT-10), - num_physpages << (PAGE_SHIFT-10), - codesize >> 10, - reservedpages << (PAGE_SHIFT-10), - datasize >> 10, - bsssize >> 10, - initsize >> 10); - -#ifdef CONFIG_MMU - pr_info("Kernel virtual memory layout:\n"); - pr_info(" * 0x%08lx..0x%08lx : fixmap\n", FIXADDR_START, FIXADDR_TOP); -#ifdef CONFIG_HIGHMEM - pr_info(" * 0x%08lx..0x%08lx : highmem PTEs\n", - PKMAP_BASE, PKMAP_ADDR(LAST_PKMAP)); -#endif /* CONFIG_HIGHMEM */ - pr_info(" * 0x%08lx..0x%08lx : early ioremap\n", - ioremap_bot, ioremap_base); - pr_info(" * 0x%08lx..0x%08lx : vmalloc & ioremap\n", - (unsigned long)VMALLOC_START, VMALLOC_END); -#endif - mem_init_done = 1; -} - -#ifndef CONFIG_MMU -int page_is_ram(unsigned long pfn) -{ - return __range_ok(pfn, 0); -} -#else -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 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 (!memblock.reserved.cnt) { - printk(KERN_EMERG "Error memory count\n"); - machine_restart(NULL); - } - - if ((u32) memblock.memory.regions[0].size < 0x400000) { - printk(KERN_EMERG "Memory must be greater than 4MB\n"); - machine_restart(NULL); - } - - if ((u32) memblock.memory.regions[0].size < kernel_tlb) { - printk(KERN_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) { - mem_pieces_remove(&phys_avail, __pa(initrd_start), - initrd_end - initrd_start, 1); - }*/ -#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); -} - -/* This is only called until mem_init is done. */ -void __init *early_get_page(void) -{ - void *p; - if (init_bootmem_done) { - p = alloc_bootmem_pages(PAGE_SIZE); - } else { - /* - * Mem start + kernel_tlb -> here is limit - * because of mem mapping from head.S - */ - p = __va(memblock_alloc_base(PAGE_SIZE, PAGE_SIZE, - memory_start + kernel_tlb)); - } - return p; -} - -#endif /* CONFIG_MMU */ - -void * __init_refok alloc_maybe_bootmem(size_t size, gfp_t mask) -{ - if (mem_init_done) - return kmalloc(size, mask); - else - return alloc_bootmem(size); -} - -void * __init_refok zalloc_maybe_bootmem(size_t size, gfp_t mask) -{ - void *p; - - if (mem_init_done) - p = kzalloc(size, mask); - else { - p = alloc_bootmem(size); - if (p) - memset(p, 0, size); - } - return p; -} |