diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/hexagon/mm/init.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/hexagon/mm/init.c | 276 |
1 files changed, 0 insertions, 276 deletions
diff --git a/ANDROID_3.4.5/arch/hexagon/mm/init.c b/ANDROID_3.4.5/arch/hexagon/mm/init.c deleted file mode 100644 index b57d7417..00000000 --- a/ANDROID_3.4.5/arch/hexagon/mm/init.c +++ /dev/null @@ -1,276 +0,0 @@ -/* - * Memory subsystem initialization for Hexagon - * - * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 and - * only version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - */ - -#include <linux/init.h> -#include <linux/mm.h> -#include <linux/bootmem.h> -#include <asm/atomic.h> -#include <linux/highmem.h> -#include <asm/tlb.h> -#include <asm/sections.h> -#include <asm/vm_mmu.h> - -/* - * Define a startpg just past the end of the kernel image and a lastpg - * that corresponds to the end of real or simulated platform memory. - */ -#define bootmem_startpg (PFN_UP(((unsigned long) _end) - PAGE_OFFSET)) - -unsigned long bootmem_lastpg; /* Should be set by platform code */ - -/* Set as variable to limit PMD copies */ -int max_kernel_seg = 0x303; - -/* think this should be (page_size-1) the way it's used...*/ -unsigned long zero_page_mask; - -/* indicate pfn's of high memory */ -unsigned long highstart_pfn, highend_pfn; - -/* struct mmu_gather defined in asm-generic.h; */ -DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); - -/* Default cache attribute for newly created page tables */ -unsigned long _dflt_cache_att = CACHEDEF; - -/* - * The current "generation" of kernel map, which should not roll - * over until Hell freezes over. Actual bound in years needs to be - * calculated to confirm. - */ -DEFINE_SPINLOCK(kmap_gen_lock); - -/* checkpatch says don't init this to 0. */ -unsigned long long kmap_generation; - -/* - * mem_init - initializes memory - * - * Frees up bootmem - * Fixes up more stuff for HIGHMEM - * Calculates and displays memory available/used - */ -void __init mem_init(void) -{ - /* No idea where this is actually declared. Seems to evade LXR. */ - totalram_pages += free_all_bootmem(); - num_physpages = bootmem_lastpg; /* seriously, what? */ - - printk(KERN_INFO "totalram_pages = %ld\n", totalram_pages); - - /* - * To-Do: someone somewhere should wipe out the bootmem map - * after we're done? - */ - - /* - * This can be moved to some more virtual-memory-specific - * initialization hook at some point. Set the init_mm - * descriptors "context" value to point to the initial - * kernel segment table's physical address. - */ - init_mm.context.ptbase = __pa(init_mm.pgd); -} - -/* - * free_initmem - frees memory used by stuff declared with __init - * - * Todo: free pages between __init_begin and __init_end; possibly - * some devtree related stuff as well. - */ -void __init_refok free_initmem(void) -{ -} - -/* - * free_initrd_mem - frees... initrd memory. - * @start - start of init memory - * @end - end of init memory - * - * Apparently has to be passed the address of the initrd memory. - * - * Wrapped by #ifdef CONFIG_BLKDEV_INITRD - */ -void free_initrd_mem(unsigned long start, unsigned long end) -{ -} - -void sync_icache_dcache(pte_t pte) -{ - unsigned long addr; - struct page *page; - - page = pte_page(pte); - addr = (unsigned long) page_address(page); - - __vmcache_idsync(addr, PAGE_SIZE); -} - -/* - * In order to set up page allocator "nodes", - * somebody has to call free_area_init() for UMA. - * - * In this mode, we only have one pg_data_t - * structure: contig_mem_data. - */ -void __init paging_init(void) -{ - unsigned long zones_sizes[MAX_NR_ZONES] = {0, }; - - /* - * This is not particularly well documented anywhere, but - * give ZONE_NORMAL all the memory, including the big holes - * left by the kernel+bootmem_map which are already left as reserved - * in the bootmem_map; free_area_init should see those bits and - * adjust accordingly. - */ - - zones_sizes[ZONE_NORMAL] = max_low_pfn; - - free_area_init(zones_sizes); /* sets up the zonelists and mem_map */ - - /* - * Start of high memory area. Will probably need something more - * fancy if we... get more fancy. - */ - high_memory = (void *)((bootmem_lastpg + 1) << PAGE_SHIFT); -} - -#ifndef DMA_RESERVE -#define DMA_RESERVE (4) -#endif - -#define DMA_CHUNKSIZE (1<<22) -#define DMA_RESERVED_BYTES (DMA_RESERVE * DMA_CHUNKSIZE) - -/* - * Pick out the memory size. We look for mem=size, - * where size is "size[KkMm]" - */ -static int __init early_mem(char *p) -{ - unsigned long size; - char *endp; - - size = memparse(p, &endp); - - bootmem_lastpg = PFN_DOWN(size); - - return 0; -} -early_param("mem", early_mem); - -size_t hexagon_coherent_pool_size = (size_t) (DMA_RESERVE << 22); - -void __init setup_arch_memory(void) -{ - int bootmap_size; - /* XXX Todo: this probably should be cleaned up */ - u32 *segtable = (u32 *) &swapper_pg_dir[0]; - u32 *segtable_end; - - /* - * Set up boot memory allocator - * - * The Gorman book also talks about these functions. - * This needs to change for highmem setups. - */ - - /* Memory size needs to be a multiple of 16M */ - bootmem_lastpg = PFN_DOWN((bootmem_lastpg << PAGE_SHIFT) & - ~((BIG_KERNEL_PAGE_SIZE) - 1)); - - /* - * Reserve the top DMA_RESERVE bytes of RAM for DMA (uncached) - * memory allocation - */ - bootmap_size = init_bootmem(bootmem_startpg, bootmem_lastpg - - PFN_DOWN(DMA_RESERVED_BYTES)); - - printk(KERN_INFO "bootmem_startpg: 0x%08lx\n", bootmem_startpg); - printk(KERN_INFO "bootmem_lastpg: 0x%08lx\n", bootmem_lastpg); - printk(KERN_INFO "bootmap_size: %d\n", bootmap_size); - printk(KERN_INFO "max_low_pfn: 0x%08lx\n", max_low_pfn); - - /* - * The default VM page tables (will be) populated with - * VA=PA+PAGE_OFFSET mapping. We go in and invalidate entries - * higher than what we have memory for. - */ - - /* this is pointer arithmetic; each entry covers 4MB */ - segtable = segtable + (PAGE_OFFSET >> 22); - - /* this actually only goes to the end of the first gig */ - segtable_end = segtable + (1<<(30-22)); - - /* Move forward to the start of empty pages */ - segtable += bootmem_lastpg >> (22-PAGE_SHIFT); - - { - int i; - - for (i = 1 ; i <= DMA_RESERVE ; i++) - segtable[-i] = ((segtable[-i] & __HVM_PTE_PGMASK_4MB) - | __HVM_PTE_R | __HVM_PTE_W | __HVM_PTE_X - | __HEXAGON_C_UNC << 6 - | __HVM_PDE_S_4MB); - } - - printk(KERN_INFO "clearing segtable from %p to %p\n", segtable, - segtable_end); - while (segtable < (segtable_end-8)) - *(segtable++) = __HVM_PDE_S_INVALID; - /* stop the pointer at the device I/O 4MB page */ - - printk(KERN_INFO "segtable = %p (should be equal to _K_io_map)\n", - segtable); - -#if 0 - /* Other half of the early device table from vm_init_segtable. */ - printk(KERN_INFO "&_K_init_devicetable = 0x%08x\n", - (unsigned long) _K_init_devicetable-PAGE_OFFSET); - *segtable = ((u32) (unsigned long) _K_init_devicetable-PAGE_OFFSET) | - __HVM_PDE_S_4KB; - printk(KERN_INFO "*segtable = 0x%08x\n", *segtable); -#endif - - /* - * Free all the memory that wasn't taken up by the bootmap, the DMA - * reserve, or kernel itself. - */ - free_bootmem(PFN_PHYS(bootmem_startpg)+bootmap_size, - PFN_PHYS(bootmem_lastpg - bootmem_startpg) - bootmap_size - - DMA_RESERVED_BYTES); - - /* - * The bootmem allocator seemingly just lives to feed memory - * to the paging system - */ - printk(KERN_INFO "PAGE_SIZE=%lu\n", PAGE_SIZE); - paging_init(); /* See Gorman Book, 2.3 */ - - /* - * At this point, the page allocator is kind of initialized, but - * apparently no pages are available (just like with the bootmem - * allocator), and need to be freed themselves via mem_init(), - * which is called by start_kernel() later on in the process - */ -} |