forked from Minki/linux
5a0e3ad6af
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
754 lines
18 KiB
C
754 lines
18 KiB
C
/*
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* linux/arch/arm/mm/init.c
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*
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* Copyright (C) 1995-2005 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/swap.h>
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#include <linux/init.h>
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#include <linux/bootmem.h>
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#include <linux/mman.h>
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#include <linux/nodemask.h>
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#include <linux/initrd.h>
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#include <linux/sort.h>
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#include <linux/highmem.h>
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#include <linux/gfp.h>
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#include <asm/mach-types.h>
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#include <asm/sections.h>
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#include <asm/setup.h>
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#include <asm/sizes.h>
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#include <asm/tlb.h>
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#include <asm/fixmap.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include "mm.h"
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static unsigned long phys_initrd_start __initdata = 0;
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static unsigned long phys_initrd_size __initdata = 0;
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static int __init early_initrd(char *p)
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{
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unsigned long start, size;
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char *endp;
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start = memparse(p, &endp);
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if (*endp == ',') {
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size = memparse(endp + 1, NULL);
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phys_initrd_start = start;
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phys_initrd_size = size;
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}
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return 0;
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}
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early_param("initrd", early_initrd);
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static int __init parse_tag_initrd(const struct tag *tag)
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{
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printk(KERN_WARNING "ATAG_INITRD is deprecated; "
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"please update your bootloader.\n");
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phys_initrd_start = __virt_to_phys(tag->u.initrd.start);
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phys_initrd_size = tag->u.initrd.size;
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return 0;
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}
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__tagtable(ATAG_INITRD, parse_tag_initrd);
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static int __init parse_tag_initrd2(const struct tag *tag)
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{
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phys_initrd_start = tag->u.initrd.start;
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phys_initrd_size = tag->u.initrd.size;
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return 0;
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}
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__tagtable(ATAG_INITRD2, parse_tag_initrd2);
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/*
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* This keeps memory configuration data used by a couple memory
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* initialization functions, as well as show_mem() for the skipping
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* of holes in the memory map. It is populated by arm_add_memory().
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*/
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struct meminfo meminfo;
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void show_mem(void)
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{
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int free = 0, total = 0, reserved = 0;
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int shared = 0, cached = 0, slab = 0, node, i;
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struct meminfo * mi = &meminfo;
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printk("Mem-info:\n");
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show_free_areas();
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for_each_online_node(node) {
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pg_data_t *n = NODE_DATA(node);
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struct page *map = pgdat_page_nr(n, 0) - n->node_start_pfn;
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for_each_nodebank (i,mi,node) {
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struct membank *bank = &mi->bank[i];
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unsigned int pfn1, pfn2;
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struct page *page, *end;
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pfn1 = bank_pfn_start(bank);
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pfn2 = bank_pfn_end(bank);
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page = map + pfn1;
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end = map + pfn2;
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do {
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total++;
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if (PageReserved(page))
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reserved++;
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else if (PageSwapCache(page))
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cached++;
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else if (PageSlab(page))
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slab++;
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else if (!page_count(page))
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free++;
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else
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shared += page_count(page) - 1;
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page++;
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} while (page < end);
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}
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}
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printk("%d pages of RAM\n", total);
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printk("%d free pages\n", free);
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printk("%d reserved pages\n", reserved);
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printk("%d slab pages\n", slab);
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printk("%d pages shared\n", shared);
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printk("%d pages swap cached\n", cached);
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}
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static void __init find_node_limits(int node, struct meminfo *mi,
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unsigned long *min, unsigned long *max_low, unsigned long *max_high)
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{
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int i;
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*min = -1UL;
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*max_low = *max_high = 0;
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for_each_nodebank(i, mi, node) {
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struct membank *bank = &mi->bank[i];
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unsigned long start, end;
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start = bank_pfn_start(bank);
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end = bank_pfn_end(bank);
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if (*min > start)
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*min = start;
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if (*max_high < end)
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*max_high = end;
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if (bank->highmem)
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continue;
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if (*max_low < end)
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*max_low = end;
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}
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}
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/*
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* FIXME: We really want to avoid allocating the bootmap bitmap
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* over the top of the initrd. Hopefully, this is located towards
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* the start of a bank, so if we allocate the bootmap bitmap at
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* the end, we won't clash.
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*/
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static unsigned int __init
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find_bootmap_pfn(int node, struct meminfo *mi, unsigned int bootmap_pages)
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{
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unsigned int start_pfn, i, bootmap_pfn;
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start_pfn = PAGE_ALIGN(__pa(_end)) >> PAGE_SHIFT;
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bootmap_pfn = 0;
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for_each_nodebank(i, mi, node) {
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struct membank *bank = &mi->bank[i];
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unsigned int start, end;
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start = bank_pfn_start(bank);
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end = bank_pfn_end(bank);
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if (end < start_pfn)
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continue;
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if (start < start_pfn)
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start = start_pfn;
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if (end <= start)
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continue;
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if (end - start >= bootmap_pages) {
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bootmap_pfn = start;
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break;
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}
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}
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if (bootmap_pfn == 0)
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BUG();
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return bootmap_pfn;
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}
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static int __init check_initrd(struct meminfo *mi)
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{
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int initrd_node = -2;
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#ifdef CONFIG_BLK_DEV_INITRD
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unsigned long end = phys_initrd_start + phys_initrd_size;
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/*
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* Make sure that the initrd is within a valid area of
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* memory.
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*/
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if (phys_initrd_size) {
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unsigned int i;
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initrd_node = -1;
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for (i = 0; i < mi->nr_banks; i++) {
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struct membank *bank = &mi->bank[i];
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if (bank_phys_start(bank) <= phys_initrd_start &&
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end <= bank_phys_end(bank))
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initrd_node = bank->node;
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}
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}
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if (initrd_node == -1) {
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printk(KERN_ERR "INITRD: 0x%08lx+0x%08lx extends beyond "
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"physical memory - disabling initrd\n",
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phys_initrd_start, phys_initrd_size);
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phys_initrd_start = phys_initrd_size = 0;
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}
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#endif
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return initrd_node;
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}
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static inline void map_memory_bank(struct membank *bank)
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{
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#ifdef CONFIG_MMU
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struct map_desc map;
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map.pfn = bank_pfn_start(bank);
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map.virtual = __phys_to_virt(bank_phys_start(bank));
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map.length = bank_phys_size(bank);
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map.type = MT_MEMORY;
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create_mapping(&map);
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#endif
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}
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static void __init bootmem_init_node(int node, struct meminfo *mi,
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unsigned long start_pfn, unsigned long end_pfn)
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{
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unsigned long boot_pfn;
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unsigned int boot_pages;
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pg_data_t *pgdat;
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int i;
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/*
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* Map the memory banks for this node.
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*/
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for_each_nodebank(i, mi, node) {
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struct membank *bank = &mi->bank[i];
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if (!bank->highmem)
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map_memory_bank(bank);
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}
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/*
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* Allocate the bootmem bitmap page.
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*/
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boot_pages = bootmem_bootmap_pages(end_pfn - start_pfn);
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boot_pfn = find_bootmap_pfn(node, mi, boot_pages);
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/*
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* Initialise the bootmem allocator for this node, handing the
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* memory banks over to bootmem.
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*/
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node_set_online(node);
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pgdat = NODE_DATA(node);
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init_bootmem_node(pgdat, boot_pfn, start_pfn, end_pfn);
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for_each_nodebank(i, mi, node) {
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struct membank *bank = &mi->bank[i];
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if (!bank->highmem)
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free_bootmem_node(pgdat, bank_phys_start(bank), bank_phys_size(bank));
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}
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/*
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* Reserve the bootmem bitmap for this node.
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*/
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reserve_bootmem_node(pgdat, boot_pfn << PAGE_SHIFT,
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boot_pages << PAGE_SHIFT, BOOTMEM_DEFAULT);
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}
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static void __init bootmem_reserve_initrd(int node)
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{
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#ifdef CONFIG_BLK_DEV_INITRD
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pg_data_t *pgdat = NODE_DATA(node);
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int res;
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res = reserve_bootmem_node(pgdat, phys_initrd_start,
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phys_initrd_size, BOOTMEM_EXCLUSIVE);
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if (res == 0) {
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initrd_start = __phys_to_virt(phys_initrd_start);
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initrd_end = initrd_start + phys_initrd_size;
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} else {
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printk(KERN_ERR
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"INITRD: 0x%08lx+0x%08lx overlaps in-use "
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"memory region - disabling initrd\n",
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phys_initrd_start, phys_initrd_size);
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}
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#endif
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}
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static void __init bootmem_free_node(int node, struct meminfo *mi)
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{
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unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES];
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unsigned long min, max_low, max_high;
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int i;
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find_node_limits(node, mi, &min, &max_low, &max_high);
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/*
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* initialise the zones within this node.
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*/
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memset(zone_size, 0, sizeof(zone_size));
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/*
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* The size of this node has already been determined. If we need
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* to do anything fancy with the allocation of this memory to the
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* zones, now is the time to do it.
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*/
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zone_size[0] = max_low - min;
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#ifdef CONFIG_HIGHMEM
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zone_size[ZONE_HIGHMEM] = max_high - max_low;
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#endif
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/*
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* For each bank in this node, calculate the size of the holes.
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* holes = node_size - sum(bank_sizes_in_node)
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*/
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memcpy(zhole_size, zone_size, sizeof(zhole_size));
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for_each_nodebank(i, mi, node) {
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int idx = 0;
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#ifdef CONFIG_HIGHMEM
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if (mi->bank[i].highmem)
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idx = ZONE_HIGHMEM;
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#endif
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zhole_size[idx] -= bank_pfn_size(&mi->bank[i]);
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}
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/*
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* Adjust the sizes according to any special requirements for
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* this machine type.
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*/
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arch_adjust_zones(node, zone_size, zhole_size);
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free_area_init_node(node, zone_size, min, zhole_size);
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}
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#ifndef CONFIG_SPARSEMEM
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int pfn_valid(unsigned long pfn)
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{
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struct meminfo *mi = &meminfo;
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unsigned int left = 0, right = mi->nr_banks;
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do {
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unsigned int mid = (right + left) / 2;
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struct membank *bank = &mi->bank[mid];
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if (pfn < bank_pfn_start(bank))
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right = mid;
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else if (pfn >= bank_pfn_end(bank))
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left = mid + 1;
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else
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return 1;
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} while (left < right);
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return 0;
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}
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EXPORT_SYMBOL(pfn_valid);
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static void arm_memory_present(struct meminfo *mi, int node)
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{
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}
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#else
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static void arm_memory_present(struct meminfo *mi, int node)
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{
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int i;
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for_each_nodebank(i, mi, node) {
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struct membank *bank = &mi->bank[i];
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memory_present(node, bank_pfn_start(bank), bank_pfn_end(bank));
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}
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}
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#endif
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static int __init meminfo_cmp(const void *_a, const void *_b)
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{
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const struct membank *a = _a, *b = _b;
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long cmp = bank_pfn_start(a) - bank_pfn_start(b);
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return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
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}
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void __init bootmem_init(void)
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{
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struct meminfo *mi = &meminfo;
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unsigned long min, max_low, max_high;
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int node, initrd_node;
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sort(&mi->bank, mi->nr_banks, sizeof(mi->bank[0]), meminfo_cmp, NULL);
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/*
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* Locate which node contains the ramdisk image, if any.
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*/
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initrd_node = check_initrd(mi);
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max_low = max_high = 0;
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/*
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* Run through each node initialising the bootmem allocator.
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*/
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for_each_node(node) {
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unsigned long node_low, node_high;
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find_node_limits(node, mi, &min, &node_low, &node_high);
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if (node_low > max_low)
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max_low = node_low;
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if (node_high > max_high)
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max_high = node_high;
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/*
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* If there is no memory in this node, ignore it.
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* (We can't have nodes which have no lowmem)
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*/
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if (node_low == 0)
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continue;
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bootmem_init_node(node, mi, min, node_low);
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/*
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* Reserve any special node zero regions.
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*/
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if (node == 0)
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reserve_node_zero(NODE_DATA(node));
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/*
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* If the initrd is in this node, reserve its memory.
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*/
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if (node == initrd_node)
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bootmem_reserve_initrd(node);
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/*
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* Sparsemem tries to allocate bootmem in memory_present(),
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* so must be done after the fixed reservations
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*/
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arm_memory_present(mi, node);
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}
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/*
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* sparse_init() needs the bootmem allocator up and running.
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*/
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sparse_init();
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/*
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* Now free memory in each node - free_area_init_node needs
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* the sparse mem_map arrays initialized by sparse_init()
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* for memmap_init_zone(), otherwise all PFNs are invalid.
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*/
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for_each_node(node)
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bootmem_free_node(node, mi);
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high_memory = __va((max_low << PAGE_SHIFT) - 1) + 1;
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/*
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* This doesn't seem to be used by the Linux memory manager any
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* more, but is used by ll_rw_block. If we can get rid of it, we
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* also get rid of some of the stuff above as well.
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*
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* Note: max_low_pfn and max_pfn reflect the number of _pages_ in
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* the system, not the maximum PFN.
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*/
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max_low_pfn = max_low - PHYS_PFN_OFFSET;
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max_pfn = max_high - PHYS_PFN_OFFSET;
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}
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static inline int free_area(unsigned long pfn, unsigned long end, char *s)
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{
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unsigned int pages = 0, size = (end - pfn) << (PAGE_SHIFT - 10);
|
|
|
|
for (; pfn < end; pfn++) {
|
|
struct page *page = pfn_to_page(pfn);
|
|
ClearPageReserved(page);
|
|
init_page_count(page);
|
|
__free_page(page);
|
|
pages++;
|
|
}
|
|
|
|
if (size && s)
|
|
printk(KERN_INFO "Freeing %s memory: %dK\n", s, size);
|
|
|
|
return pages;
|
|
}
|
|
|
|
static inline void
|
|
free_memmap(int node, unsigned long start_pfn, unsigned long end_pfn)
|
|
{
|
|
struct page *start_pg, *end_pg;
|
|
unsigned long pg, pgend;
|
|
|
|
/*
|
|
* Convert start_pfn/end_pfn to a struct page pointer.
|
|
*/
|
|
start_pg = pfn_to_page(start_pfn - 1) + 1;
|
|
end_pg = pfn_to_page(end_pfn);
|
|
|
|
/*
|
|
* Convert to physical addresses, and
|
|
* round start upwards and end downwards.
|
|
*/
|
|
pg = PAGE_ALIGN(__pa(start_pg));
|
|
pgend = __pa(end_pg) & PAGE_MASK;
|
|
|
|
/*
|
|
* If there are free pages between these,
|
|
* free the section of the memmap array.
|
|
*/
|
|
if (pg < pgend)
|
|
free_bootmem_node(NODE_DATA(node), pg, pgend - pg);
|
|
}
|
|
|
|
/*
|
|
* The mem_map array can get very big. Free the unused area of the memory map.
|
|
*/
|
|
static void __init free_unused_memmap_node(int node, struct meminfo *mi)
|
|
{
|
|
unsigned long bank_start, prev_bank_end = 0;
|
|
unsigned int i;
|
|
|
|
/*
|
|
* [FIXME] This relies on each bank being in address order. This
|
|
* may not be the case, especially if the user has provided the
|
|
* information on the command line.
|
|
*/
|
|
for_each_nodebank(i, mi, node) {
|
|
struct membank *bank = &mi->bank[i];
|
|
|
|
bank_start = bank_pfn_start(bank);
|
|
if (bank_start < prev_bank_end) {
|
|
printk(KERN_ERR "MEM: unordered memory banks. "
|
|
"Not freeing memmap.\n");
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* If we had a previous bank, and there is a space
|
|
* between the current bank and the previous, free it.
|
|
*/
|
|
if (prev_bank_end && prev_bank_end != bank_start)
|
|
free_memmap(node, prev_bank_end, bank_start);
|
|
|
|
prev_bank_end = bank_pfn_end(bank);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* mem_init() marks the free areas in the mem_map and tells us how much
|
|
* memory is free. This is done after various parts of the system have
|
|
* claimed their memory after the kernel image.
|
|
*/
|
|
void __init mem_init(void)
|
|
{
|
|
unsigned long reserved_pages, free_pages;
|
|
int i, node;
|
|
|
|
#ifndef CONFIG_DISCONTIGMEM
|
|
max_mapnr = pfn_to_page(max_pfn + PHYS_PFN_OFFSET) - mem_map;
|
|
#endif
|
|
|
|
/* this will put all unused low memory onto the freelists */
|
|
for_each_online_node(node) {
|
|
pg_data_t *pgdat = NODE_DATA(node);
|
|
|
|
free_unused_memmap_node(node, &meminfo);
|
|
|
|
if (pgdat->node_spanned_pages != 0)
|
|
totalram_pages += free_all_bootmem_node(pgdat);
|
|
}
|
|
|
|
#ifdef CONFIG_SA1111
|
|
/* now that our DMA memory is actually so designated, we can free it */
|
|
totalram_pages += free_area(PHYS_PFN_OFFSET,
|
|
__phys_to_pfn(__pa(swapper_pg_dir)), NULL);
|
|
#endif
|
|
|
|
#ifdef CONFIG_HIGHMEM
|
|
/* set highmem page free */
|
|
for_each_online_node(node) {
|
|
for_each_nodebank (i, &meminfo, node) {
|
|
unsigned long start = bank_pfn_start(&meminfo.bank[i]);
|
|
unsigned long end = bank_pfn_end(&meminfo.bank[i]);
|
|
if (start >= max_low_pfn + PHYS_PFN_OFFSET)
|
|
totalhigh_pages += free_area(start, end, NULL);
|
|
}
|
|
}
|
|
totalram_pages += totalhigh_pages;
|
|
#endif
|
|
|
|
reserved_pages = free_pages = 0;
|
|
|
|
for_each_online_node(node) {
|
|
pg_data_t *n = NODE_DATA(node);
|
|
struct page *map = pgdat_page_nr(n, 0) - n->node_start_pfn;
|
|
|
|
for_each_nodebank(i, &meminfo, node) {
|
|
struct membank *bank = &meminfo.bank[i];
|
|
unsigned int pfn1, pfn2;
|
|
struct page *page, *end;
|
|
|
|
pfn1 = bank_pfn_start(bank);
|
|
pfn2 = bank_pfn_end(bank);
|
|
|
|
page = map + pfn1;
|
|
end = map + pfn2;
|
|
|
|
do {
|
|
if (PageReserved(page))
|
|
reserved_pages++;
|
|
else if (!page_count(page))
|
|
free_pages++;
|
|
page++;
|
|
} while (page < end);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Since our memory may not be contiguous, calculate the
|
|
* real number of pages we have in this system
|
|
*/
|
|
printk(KERN_INFO "Memory:");
|
|
num_physpages = 0;
|
|
for (i = 0; i < meminfo.nr_banks; i++) {
|
|
num_physpages += bank_pfn_size(&meminfo.bank[i]);
|
|
printk(" %ldMB", bank_phys_size(&meminfo.bank[i]) >> 20);
|
|
}
|
|
printk(" = %luMB total\n", num_physpages >> (20 - PAGE_SHIFT));
|
|
|
|
printk(KERN_NOTICE "Memory: %luk/%luk available, %luk reserved, %luK highmem\n",
|
|
nr_free_pages() << (PAGE_SHIFT-10),
|
|
free_pages << (PAGE_SHIFT-10),
|
|
reserved_pages << (PAGE_SHIFT-10),
|
|
totalhigh_pages << (PAGE_SHIFT-10));
|
|
|
|
#define MLK(b, t) b, t, ((t) - (b)) >> 10
|
|
#define MLM(b, t) b, t, ((t) - (b)) >> 20
|
|
#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), SZ_1K)
|
|
|
|
printk(KERN_NOTICE "Virtual kernel memory layout:\n"
|
|
" vector : 0x%08lx - 0x%08lx (%4ld kB)\n"
|
|
" fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
|
|
#ifdef CONFIG_MMU
|
|
" DMA : 0x%08lx - 0x%08lx (%4ld MB)\n"
|
|
#endif
|
|
" vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n"
|
|
" lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n"
|
|
#ifdef CONFIG_HIGHMEM
|
|
" pkmap : 0x%08lx - 0x%08lx (%4ld MB)\n"
|
|
#endif
|
|
" modules : 0x%08lx - 0x%08lx (%4ld MB)\n"
|
|
" .init : 0x%p" " - 0x%p" " (%4d kB)\n"
|
|
" .text : 0x%p" " - 0x%p" " (%4d kB)\n"
|
|
" .data : 0x%p" " - 0x%p" " (%4d kB)\n",
|
|
|
|
MLK(UL(CONFIG_VECTORS_BASE), UL(CONFIG_VECTORS_BASE) +
|
|
(PAGE_SIZE)),
|
|
MLK(FIXADDR_START, FIXADDR_TOP),
|
|
#ifdef CONFIG_MMU
|
|
MLM(CONSISTENT_BASE, CONSISTENT_END),
|
|
#endif
|
|
MLM(VMALLOC_START, VMALLOC_END),
|
|
MLM(PAGE_OFFSET, (unsigned long)high_memory),
|
|
#ifdef CONFIG_HIGHMEM
|
|
MLM(PKMAP_BASE, (PKMAP_BASE) + (LAST_PKMAP) *
|
|
(PAGE_SIZE)),
|
|
#endif
|
|
MLM(MODULES_VADDR, MODULES_END),
|
|
|
|
MLK_ROUNDUP(__init_begin, __init_end),
|
|
MLK_ROUNDUP(_text, _etext),
|
|
MLK_ROUNDUP(_data, _edata));
|
|
|
|
#undef MLK
|
|
#undef MLM
|
|
#undef MLK_ROUNDUP
|
|
|
|
/*
|
|
* Check boundaries twice: Some fundamental inconsistencies can
|
|
* be detected at build time already.
|
|
*/
|
|
#ifdef CONFIG_MMU
|
|
BUILD_BUG_ON(VMALLOC_END > CONSISTENT_BASE);
|
|
BUG_ON(VMALLOC_END > CONSISTENT_BASE);
|
|
|
|
BUILD_BUG_ON(TASK_SIZE > MODULES_VADDR);
|
|
BUG_ON(TASK_SIZE > MODULES_VADDR);
|
|
#endif
|
|
|
|
#ifdef CONFIG_HIGHMEM
|
|
BUILD_BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET);
|
|
BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET);
|
|
#endif
|
|
|
|
if (PAGE_SIZE >= 16384 && num_physpages <= 128) {
|
|
extern int sysctl_overcommit_memory;
|
|
/*
|
|
* On a machine this small we won't get
|
|
* anywhere without overcommit, so turn
|
|
* it on by default.
|
|
*/
|
|
sysctl_overcommit_memory = OVERCOMMIT_ALWAYS;
|
|
}
|
|
}
|
|
|
|
void free_initmem(void)
|
|
{
|
|
#ifdef CONFIG_HAVE_TCM
|
|
extern char *__tcm_start, *__tcm_end;
|
|
|
|
totalram_pages += free_area(__phys_to_pfn(__pa(__tcm_start)),
|
|
__phys_to_pfn(__pa(__tcm_end)),
|
|
"TCM link");
|
|
#endif
|
|
|
|
if (!machine_is_integrator() && !machine_is_cintegrator())
|
|
totalram_pages += free_area(__phys_to_pfn(__pa(__init_begin)),
|
|
__phys_to_pfn(__pa(__init_end)),
|
|
"init");
|
|
}
|
|
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
|
|
static int keep_initrd;
|
|
|
|
void free_initrd_mem(unsigned long start, unsigned long end)
|
|
{
|
|
if (!keep_initrd)
|
|
totalram_pages += free_area(__phys_to_pfn(__pa(start)),
|
|
__phys_to_pfn(__pa(end)),
|
|
"initrd");
|
|
}
|
|
|
|
static int __init keepinitrd_setup(char *__unused)
|
|
{
|
|
keep_initrd = 1;
|
|
return 1;
|
|
}
|
|
|
|
__setup("keepinitrd", keepinitrd_setup);
|
|
#endif
|