13f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel/* 23f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * arch/xtensa/mm/init.c 33f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * 43f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * Derived from MIPS, PPC. 53f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * 63f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * This file is subject to the terms and conditions of the GNU General Public 73f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * License. See the file "COPYING" in the main directory of this archive 83f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * for more details. 93f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * 103f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * Copyright (C) 2001 - 2005 Tensilica Inc. 113f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * 123f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * Chris Zankel <chris@zankel.net> 133f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * Joe Taylor <joe@tensilica.com, joetylr@yahoo.com> 143f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * Marc Gauthier 153f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * Kevin Chea 163f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel */ 173f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 183f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel#include <linux/kernel.h> 193f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel#include <linux/errno.h> 203f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel#include <linux/bootmem.h> 215a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/gfp.h> 223f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel#include <linux/swap.h> 236656920b0b50beacb6cb64cf55273cbb686e436eChris Zankel#include <linux/mman.h> 246656920b0b50beacb6cb64cf55273cbb686e436eChris Zankel#include <linux/nodemask.h> 256656920b0b50beacb6cb64cf55273cbb686e436eChris Zankel#include <linux/mm.h> 263f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 273f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel#include <asm/bootparam.h> 283f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel#include <asm/page.h> 293f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 303f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel/* References to section boundaries */ 313f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 323f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankelextern char _ftext, _etext, _fdata, _edata, _rodata_end; 333f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankelextern char __init_begin, __init_end; 343f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 353f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel/* 363f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * mem_reserve(start, end, must_exist) 373f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * 383f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * Reserve some memory from the memory pool. 393f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * 403f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * Parameters: 413f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * start Start of region, 423f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * end End of region, 433f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * must_exist Must exist in memory pool. 443f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * 453f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * Returns: 463f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * 0 (memory area couldn't be mapped) 473f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * -1 (success) 483f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel */ 493f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 503f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankelint __init mem_reserve(unsigned long start, unsigned long end, int must_exist) 513f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel{ 523f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel int i; 533f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 543f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel if (start == end) 553f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel return 0; 563f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 573f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel start = start & PAGE_MASK; 583f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel end = PAGE_ALIGN(end); 593f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 603f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel for (i = 0; i < sysmem.nr_banks; i++) 613f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel if (start < sysmem.bank[i].end 623f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel && end >= sysmem.bank[i].start) 633f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel break; 643f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 653f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel if (i == sysmem.nr_banks) { 663f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel if (must_exist) 673f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel printk (KERN_WARNING "mem_reserve: [0x%0lx, 0x%0lx) " 683f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel "not in any region!\n", start, end); 693f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel return 0; 703f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel } 713f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 723f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel if (start > sysmem.bank[i].start) { 733f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel if (end < sysmem.bank[i].end) { 743f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel /* split entry */ 753f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel if (sysmem.nr_banks >= SYSMEM_BANKS_MAX) 763f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel panic("meminfo overflow\n"); 773f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel sysmem.bank[sysmem.nr_banks].start = end; 783f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel sysmem.bank[sysmem.nr_banks].end = sysmem.bank[i].end; 793f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel sysmem.nr_banks++; 803f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel } 813f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel sysmem.bank[i].end = start; 823f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel } else { 833f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel if (end < sysmem.bank[i].end) 843f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel sysmem.bank[i].start = end; 853f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel else { 863f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel /* remove entry */ 873f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel sysmem.nr_banks--; 883f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel sysmem.bank[i].start = sysmem.bank[sysmem.nr_banks].start; 893f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel sysmem.bank[i].end = sysmem.bank[sysmem.nr_banks].end; 903f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel } 913f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel } 923f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel return -1; 933f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel} 943f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 953f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 963f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel/* 973f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * Initialize the bootmem system and give it all the memory we have available. 983f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel */ 993f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 1003f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankelvoid __init bootmem_init(void) 1013f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel{ 1023f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel unsigned long pfn; 1033f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel unsigned long bootmap_start, bootmap_size; 1043f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel int i; 1053f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 1063f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel max_low_pfn = max_pfn = 0; 1073f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel min_low_pfn = ~0; 1083f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 1093f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel for (i=0; i < sysmem.nr_banks; i++) { 1103f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel pfn = PAGE_ALIGN(sysmem.bank[i].start) >> PAGE_SHIFT; 1113f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel if (pfn < min_low_pfn) 1123f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel min_low_pfn = pfn; 1133f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel pfn = PAGE_ALIGN(sysmem.bank[i].end - 1) >> PAGE_SHIFT; 1143f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel if (pfn > max_pfn) 1153f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel max_pfn = pfn; 1163f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel } 1173f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 1183f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel if (min_low_pfn > max_pfn) 1193f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel panic("No memory found!\n"); 1203f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 121173d6681380aa1d60dfc35ed7178bd7811ba2784Chris Zankel max_low_pfn = max_pfn < MAX_MEM_PFN >> PAGE_SHIFT ? 122173d6681380aa1d60dfc35ed7178bd7811ba2784Chris Zankel max_pfn : MAX_MEM_PFN >> PAGE_SHIFT; 1233f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 1243f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel /* Find an area to use for the bootmem bitmap. */ 1253f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 126264da9f708b130122d881fa4570d1cd618440a73Johannes Weiner bootmap_size = bootmem_bootmap_pages(max_low_pfn - min_low_pfn); 127264da9f708b130122d881fa4570d1cd618440a73Johannes Weiner bootmap_size <<= PAGE_SHIFT; 1283f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel bootmap_start = ~0; 1293f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 1303f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel for (i=0; i<sysmem.nr_banks; i++) 1313f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel if (sysmem.bank[i].end - sysmem.bank[i].start >= bootmap_size) { 1323f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel bootmap_start = sysmem.bank[i].start; 1333f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel break; 1343f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel } 1353f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 1363f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel if (bootmap_start == ~0UL) 1373f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel panic("Cannot find %ld bytes for bootmap\n", bootmap_size); 1383f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 1393f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel /* Reserve the bootmem bitmap area */ 1403f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 1413f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel mem_reserve(bootmap_start, bootmap_start + bootmap_size, 1); 1420bef42e5c061b4aa63cc488d11400a1ef8b8f5a2Johannes Weiner bootmap_size = init_bootmem_node(NODE_DATA(0), 1433f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel bootmap_start >> PAGE_SHIFT, 1440bef42e5c061b4aa63cc488d11400a1ef8b8f5a2Johannes Weiner min_low_pfn, 1453f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel max_low_pfn); 1463f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 1473f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel /* Add all remaining memory pieces into the bootmem map */ 1483f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 1493f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel for (i=0; i<sysmem.nr_banks; i++) 1503f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel free_bootmem(sysmem.bank[i].start, 1513f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel sysmem.bank[i].end - sysmem.bank[i].start); 1523f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 1533f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel} 1543f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 1553f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 156e5083a63b6a8546c5fe1e571fe529e3939787ec2Johannes Weinervoid __init zones_init(void) 1573f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel{ 1583f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel unsigned long zones_size[MAX_NR_ZONES]; 1593f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel int i; 1603f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 1613f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel /* All pages are DMA-able, so we put them all in the DMA zone. */ 1623f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 163c947a585ab13f310c9223284dfd502790abd05f9Johannes Weiner zones_size[ZONE_DMA] = max_low_pfn - ARCH_PFN_OFFSET; 1643f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel for (i = 1; i < MAX_NR_ZONES; i++) 1653f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel zones_size[i] = 0; 1663f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 1673f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel#ifdef CONFIG_HIGHMEM 1683f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel zones_size[ZONE_HIGHMEM] = max_pfn - max_low_pfn; 1693f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel#endif 1703f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 171c947a585ab13f310c9223284dfd502790abd05f9Johannes Weiner free_area_init_node(0, zones_size, ARCH_PFN_OFFSET, NULL); 1723f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel} 1733f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 1743f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel/* 1753f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel * Initialize memory pages. 1763f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel */ 1773f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 1783f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankelvoid __init mem_init(void) 1793f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel{ 1803f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel unsigned long codesize, reservedpages, datasize, initsize; 1813f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel unsigned long highmemsize, tmp, ram; 1823f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 183c947a585ab13f310c9223284dfd502790abd05f9Johannes Weiner max_mapnr = num_physpages = max_low_pfn - ARCH_PFN_OFFSET; 184c947a585ab13f310c9223284dfd502790abd05f9Johannes Weiner high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT); 1853f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel highmemsize = 0; 1863f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 187288a60cf4d7cc35f84f46cd8ffd0b34f9d8e7346Chris Zankel#ifdef CONFIG_HIGHMEM 1883f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel#error HIGHGMEM not implemented in init.c 1893f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel#endif 1903f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 1913f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel totalram_pages += free_all_bootmem(); 1923f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 1933f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel reservedpages = ram = 0; 194c947a585ab13f310c9223284dfd502790abd05f9Johannes Weiner for (tmp = 0; tmp < max_mapnr; tmp++) { 1953f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel ram++; 1963f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel if (PageReserved(mem_map+tmp)) 1973f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel reservedpages++; 1983f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel } 1993f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 2003f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel codesize = (unsigned long) &_etext - (unsigned long) &_ftext; 2013f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel datasize = (unsigned long) &_edata - (unsigned long) &_fdata; 2023f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin; 2033f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 2043f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel printk("Memory: %luk/%luk available (%ldk kernel code, %ldk reserved, " 2053f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel "%ldk data, %ldk init %ldk highmem)\n", 206cc013a88906bad9d2832d6316de1c7dbc1c2a794Geert Uytterhoeven nr_free_pages() << (PAGE_SHIFT-10), 2073f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel ram << (PAGE_SHIFT-10), 2083f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel codesize >> 10, 2093f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel reservedpages << (PAGE_SHIFT-10), 2103f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel datasize >> 10, 2113f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel initsize >> 10, 2123f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel highmemsize >> 10); 2133f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel} 2143f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 2153f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankelvoid 2163f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankelfree_reserved_mem(void *start, void *end) 2173f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel{ 2183f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel for (; start < end; start += PAGE_SIZE) { 2193f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel ClearPageReserved(virt_to_page(start)); 2207835e98b2e3c66dba79cb0ff8ebb90a2fe030c29Nick Piggin init_page_count(virt_to_page(start)); 2213f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel free_page((unsigned long)start); 2223f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel totalram_pages++; 2233f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel } 2243f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel} 2253f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 2263f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel#ifdef CONFIG_BLK_DEV_INITRD 2273f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankelextern int initrd_is_mapped; 2283f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 2293f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankelvoid free_initrd_mem(unsigned long start, unsigned long end) 2303f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel{ 2313f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel if (initrd_is_mapped) { 2323f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel free_reserved_mem((void*)start, (void*)end); 2333f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel printk ("Freeing initrd memory: %ldk freed\n",(end-start)>>10); 2343f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel } 2353f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel} 2363f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel#endif 2373f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel 2383f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankelvoid free_initmem(void) 2393f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel{ 2403f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel free_reserved_mem(&__init_begin, &__init_end); 2413f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel printk("Freeing unused kernel memory: %dk freed\n", 2423f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel (&__init_end - &__init_begin) >> 10); 2433f65ce4d141e435e54c20ed2379d983d362a2cb5Chris Zankel} 244