2005-04-17 00:20:36 +02:00
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1994 - 2000 Ralf Baechle
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* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
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* Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
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* Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
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*/
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2007-09-11 19:05:33 +02:00
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#include <linux/bug.h>
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2005-04-17 00:20:36 +02:00
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/signal.h>
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#include <linux/sched.h>
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2009-06-19 15:05:26 +02:00
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#include <linux/smp.h>
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2005-04-17 00:20:36 +02:00
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/pagemap.h>
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#include <linux/ptrace.h>
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#include <linux/mman.h>
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#include <linux/mm.h>
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#include <linux/bootmem.h>
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#include <linux/highmem.h>
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#include <linux/swap.h>
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2005-01-21 01:59:54 +01:00
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#include <linux/proc_fs.h>
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2006-03-27 11:16:04 +02:00
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#include <linux/pfn.h>
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2009-09-07 20:11:31 +02:00
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#include <linux/hardirq.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
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>
2010-03-24 09:04:11 +01:00
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#include <linux/gfp.h>
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2005-04-17 00:20:36 +02:00
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2007-08-13 13:44:41 +02:00
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#include <asm/asm-offsets.h>
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2005-04-17 00:20:36 +02:00
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#include <asm/bootinfo.h>
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#include <asm/cachectl.h>
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#include <asm/cpu.h>
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#include <asm/dma.h>
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2006-10-22 00:17:35 +02:00
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#include <asm/kmap_types.h>
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2005-04-17 00:20:36 +02:00
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#include <asm/mmu_context.h>
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#include <asm/sections.h>
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#include <asm/pgtable.h>
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#include <asm/pgalloc.h>
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#include <asm/tlb.h>
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2006-10-22 00:17:35 +02:00
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#include <asm/fixmap.h>
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/* Atomicity and interruptability */
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#ifdef CONFIG_MIPS_MT_SMTC
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#include <asm/mipsmtregs.h>
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#define ENTER_CRITICAL(flags) \
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{ \
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unsigned int mvpflags; \
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local_irq_save(flags);\
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mvpflags = dvpe()
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#define EXIT_CRITICAL(flags) \
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evpe(mvpflags); \
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local_irq_restore(flags); \
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}
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#else
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#define ENTER_CRITICAL(flags) local_irq_save(flags)
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#define EXIT_CRITICAL(flags) local_irq_restore(flags)
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#endif /* CONFIG_MIPS_MT_SMTC */
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2005-04-17 00:20:36 +02:00
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/*
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* We have up to 8 empty zeroed pages so we can map one of the right colour
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* when needed. This is necessary only on R4000 / R4400 SC and MC versions
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* where we have to avoid VCED / VECI exceptions for good performance at
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* any price. Since page is never written to after the initialization we
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* don't have to care about aliases on other CPUs.
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*/
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unsigned long empty_zero_page, zero_page_mask;
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2008-06-06 15:23:06 +02:00
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EXPORT_SYMBOL_GPL(empty_zero_page);
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2005-04-17 00:20:36 +02:00
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/*
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* Not static inline because used by IP27 special magic initialization code
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*/
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unsigned long setup_zero_pages(void)
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{
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2006-03-22 09:08:05 +01:00
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unsigned int order;
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unsigned long size;
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2005-04-17 00:20:36 +02:00
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struct page *page;
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if (cpu_has_vce)
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order = 3;
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else
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order = 0;
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empty_zero_page = __get_free_pages(GFP_KERNEL | __GFP_ZERO, order);
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if (!empty_zero_page)
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panic("Oh boy, that early out of memory?");
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2006-10-19 13:19:59 +02:00
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page = virt_to_page((void *)empty_zero_page);
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2006-03-22 09:08:05 +01:00
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split_page(page, order);
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2006-10-19 13:19:59 +02:00
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while (page < virt_to_page((void *)(empty_zero_page + (PAGE_SIZE << order)))) {
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2005-12-12 09:37:23 +01:00
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SetPageReserved(page);
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2005-04-17 00:20:36 +02:00
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page++;
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}
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size = PAGE_SIZE << order;
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zero_page_mask = (size - 1) & PAGE_MASK;
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return 1UL << order;
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}
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2006-10-22 00:17:35 +02:00
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#ifdef CONFIG_MIPS_MT_SMTC
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static pte_t *kmap_coherent_pte;
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static void __init kmap_coherent_init(void)
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{
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unsigned long vaddr;
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/* cache the first coherent kmap pte */
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vaddr = __fix_to_virt(FIX_CMAP_BEGIN);
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kmap_coherent_pte = kmap_get_fixmap_pte(vaddr);
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}
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#else
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static inline void kmap_coherent_init(void) {}
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#endif
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2007-03-23 22:36:37 +01:00
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void *kmap_coherent(struct page *page, unsigned long addr)
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2006-10-22 00:17:35 +02:00
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{
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enum fixed_addresses idx;
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unsigned long vaddr, flags, entrylo;
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unsigned long old_ctx;
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pte_t pte;
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int tlbidx;
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2007-09-11 19:05:33 +02:00
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BUG_ON(Page_dcache_dirty(page));
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2006-10-22 00:17:35 +02:00
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inc_preempt_count();
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idx = (addr >> PAGE_SHIFT) & (FIX_N_COLOURS - 1);
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#ifdef CONFIG_MIPS_MT_SMTC
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2009-09-07 20:11:31 +02:00
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idx += FIX_N_COLOURS * smp_processor_id() +
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(in_interrupt() ? (FIX_N_COLOURS * NR_CPUS) : 0);
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#else
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idx += in_interrupt() ? FIX_N_COLOURS : 0;
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2006-10-22 00:17:35 +02:00
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#endif
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vaddr = __fix_to_virt(FIX_CMAP_END - idx);
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pte = mk_pte(page, PAGE_KERNEL);
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2007-09-19 01:46:32 +02:00
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#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32)
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2006-10-22 00:17:35 +02:00
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entrylo = pte.pte_high;
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#else
|
2010-02-11 00:12:47 +01:00
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entrylo = pte_to_entrylo(pte_val(pte));
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2006-10-22 00:17:35 +02:00
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#endif
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ENTER_CRITICAL(flags);
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old_ctx = read_c0_entryhi();
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write_c0_entryhi(vaddr & (PAGE_MASK << 1));
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write_c0_entrylo0(entrylo);
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write_c0_entrylo1(entrylo);
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#ifdef CONFIG_MIPS_MT_SMTC
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set_pte(kmap_coherent_pte - (FIX_CMAP_END - idx), pte);
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/* preload TLB instead of local_flush_tlb_one() */
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mtc0_tlbw_hazard();
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tlb_probe();
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tlb_probe_hazard();
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tlbidx = read_c0_index();
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mtc0_tlbw_hazard();
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if (tlbidx < 0)
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tlb_write_random();
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else
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tlb_write_indexed();
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#else
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tlbidx = read_c0_wired();
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write_c0_wired(tlbidx + 1);
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write_c0_index(tlbidx);
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mtc0_tlbw_hazard();
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tlb_write_indexed();
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#endif
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tlbw_use_hazard();
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write_c0_entryhi(old_ctx);
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EXIT_CRITICAL(flags);
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return (void*) vaddr;
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}
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#define UNIQUE_ENTRYHI(idx) (CKSEG0 + ((idx) << (PAGE_SHIFT + 1)))
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2007-04-26 16:46:25 +02:00
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void kunmap_coherent(void)
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2006-10-22 00:17:35 +02:00
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{
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#ifndef CONFIG_MIPS_MT_SMTC
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unsigned int wired;
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unsigned long flags, old_ctx;
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ENTER_CRITICAL(flags);
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old_ctx = read_c0_entryhi();
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wired = read_c0_wired() - 1;
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write_c0_wired(wired);
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write_c0_index(wired);
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write_c0_entryhi(UNIQUE_ENTRYHI(wired));
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write_c0_entrylo0(0);
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write_c0_entrylo1(0);
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mtc0_tlbw_hazard();
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tlb_write_indexed();
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tlbw_use_hazard();
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write_c0_entryhi(old_ctx);
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EXIT_CRITICAL(flags);
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#endif
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dec_preempt_count();
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preempt_check_resched();
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}
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2006-12-12 18:14:56 +01:00
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void copy_user_highpage(struct page *to, struct page *from,
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unsigned long vaddr, struct vm_area_struct *vma)
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{
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void *vfrom, *vto;
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vto = kmap_atomic(to, KM_USER1);
|
2008-02-16 23:34:25 +01:00
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if (cpu_has_dc_aliases &&
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page_mapped(from) && !Page_dcache_dirty(from)) {
|
2006-12-12 18:14:56 +01:00
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vfrom = kmap_coherent(from, vaddr);
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copy_page(vto, vfrom);
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2007-04-26 16:46:25 +02:00
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kunmap_coherent();
|
2006-12-12 18:14:56 +01:00
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} else {
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vfrom = kmap_atomic(from, KM_USER0);
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copy_page(vto, vfrom);
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kunmap_atomic(vfrom, KM_USER0);
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}
|
2008-04-28 18:14:26 +02:00
|
|
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if ((!cpu_has_ic_fills_f_dc) ||
|
2006-12-12 18:14:56 +01:00
|
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pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK))
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flush_data_cache_page((unsigned long)vto);
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kunmap_atomic(vto, KM_USER1);
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/* Make sure this page is cleared on other CPU's too before using it */
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smp_wmb();
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}
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|
2006-10-22 00:17:35 +02:00
|
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void copy_to_user_page(struct vm_area_struct *vma,
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struct page *page, unsigned long vaddr, void *dst, const void *src,
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unsigned long len)
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{
|
2008-02-16 23:34:25 +01:00
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|
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if (cpu_has_dc_aliases &&
|
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page_mapped(page) && !Page_dcache_dirty(page)) {
|
2006-10-22 00:17:35 +02:00
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void *vto = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
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memcpy(vto, src, len);
|
2007-04-26 16:46:25 +02:00
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kunmap_coherent();
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2007-10-15 17:30:24 +02:00
|
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} else {
|
2006-10-22 00:17:35 +02:00
|
|
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memcpy(dst, src, len);
|
2007-10-15 17:30:24 +02:00
|
|
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if (cpu_has_dc_aliases)
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SetPageDcacheDirty(page);
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}
|
2006-10-22 00:17:35 +02:00
|
|
|
if ((vma->vm_flags & VM_EXEC) && !cpu_has_ic_fills_f_dc)
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flush_cache_page(vma, vaddr, page_to_pfn(page));
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}
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void copy_from_user_page(struct vm_area_struct *vma,
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struct page *page, unsigned long vaddr, void *dst, const void *src,
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|
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unsigned long len)
|
|
|
|
{
|
2008-02-16 23:34:25 +01:00
|
|
|
if (cpu_has_dc_aliases &&
|
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|
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page_mapped(page) && !Page_dcache_dirty(page)) {
|
2007-10-15 17:30:24 +02:00
|
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|
void *vfrom = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
|
2006-10-22 00:17:35 +02:00
|
|
|
memcpy(dst, vfrom, len);
|
2007-04-26 16:46:25 +02:00
|
|
|
kunmap_coherent();
|
2007-10-15 17:30:24 +02:00
|
|
|
} else {
|
2006-10-22 00:17:35 +02:00
|
|
|
memcpy(dst, src, len);
|
2007-10-15 17:30:24 +02:00
|
|
|
if (cpu_has_dc_aliases)
|
|
|
|
SetPageDcacheDirty(page);
|
|
|
|
}
|
2006-10-22 00:17:35 +02:00
|
|
|
}
|
|
|
|
|
2005-02-07 17:13:07 +01:00
|
|
|
void __init fixrange_init(unsigned long start, unsigned long end,
|
2005-04-17 00:20:36 +02:00
|
|
|
pgd_t *pgd_base)
|
|
|
|
{
|
2006-10-22 00:17:35 +02:00
|
|
|
#if defined(CONFIG_HIGHMEM) || defined(CONFIG_MIPS_MT_SMTC)
|
2005-04-17 00:20:36 +02:00
|
|
|
pgd_t *pgd;
|
2005-02-10 13:19:59 +01:00
|
|
|
pud_t *pud;
|
2005-04-17 00:20:36 +02:00
|
|
|
pmd_t *pmd;
|
|
|
|
pte_t *pte;
|
2005-02-10 13:19:59 +01:00
|
|
|
int i, j, k;
|
2005-04-17 00:20:36 +02:00
|
|
|
unsigned long vaddr;
|
|
|
|
|
|
|
|
vaddr = start;
|
|
|
|
i = __pgd_offset(vaddr);
|
2005-02-10 13:19:59 +01:00
|
|
|
j = __pud_offset(vaddr);
|
|
|
|
k = __pmd_offset(vaddr);
|
2005-04-17 00:20:36 +02:00
|
|
|
pgd = pgd_base + i;
|
|
|
|
|
2011-01-06 08:31:30 +01:00
|
|
|
for ( ; (i < PTRS_PER_PGD) && (vaddr < end); pgd++, i++) {
|
2005-02-10 13:19:59 +01:00
|
|
|
pud = (pud_t *)pgd;
|
2011-01-06 08:31:30 +01:00
|
|
|
for ( ; (j < PTRS_PER_PUD) && (vaddr < end); pud++, j++) {
|
2005-02-10 13:19:59 +01:00
|
|
|
pmd = (pmd_t *)pud;
|
2011-01-06 08:31:30 +01:00
|
|
|
for (; (k < PTRS_PER_PMD) && (vaddr < end); pmd++, k++) {
|
2005-02-10 13:19:59 +01:00
|
|
|
if (pmd_none(*pmd)) {
|
|
|
|
pte = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
|
2006-10-22 00:17:35 +02:00
|
|
|
set_pmd(pmd, __pmd((unsigned long)pte));
|
2009-03-30 14:49:44 +02:00
|
|
|
BUG_ON(pte != pte_offset_kernel(pmd, 0));
|
2005-02-10 13:19:59 +01:00
|
|
|
}
|
|
|
|
vaddr += PMD_SIZE;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
2005-02-10 13:19:59 +01:00
|
|
|
k = 0;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
j = 0;
|
|
|
|
}
|
2006-10-22 00:17:35 +02:00
|
|
|
#endif
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
2005-06-25 23:54:31 +02:00
|
|
|
#ifndef CONFIG_NEED_MULTIPLE_NODES
|
2010-01-22 09:16:19 +01:00
|
|
|
int page_is_ram(unsigned long pagenr)
|
[MIPS] Do not count pages in holes with sparsemem
With some memory model other than FLATMEM, the single node can
contains some holes so there might be many invalid pages. For
example, with two 256M memory and one 256M hole, some variables
(num_physpage, totalpages, nr_kernel_pages, nr_all_pages, etc.) will
indicate that there are 768MB on this system. This is not desired
because, for example, alloc_large_system_hash() allocates too many
entries.
Use free_area_init_node() with counted zholes_size[] instead of
free_area_init().
For num_physpages, use number of ram pages instead of max_low_pfn.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-07-06 17:26:02 +02:00
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < boot_mem_map.nr_map; i++) {
|
|
|
|
unsigned long addr, end;
|
|
|
|
|
2011-11-22 15:38:03 +01:00
|
|
|
switch (boot_mem_map.map[i].type) {
|
|
|
|
case BOOT_MEM_RAM:
|
|
|
|
case BOOT_MEM_INIT_RAM:
|
|
|
|
break;
|
|
|
|
default:
|
[MIPS] Do not count pages in holes with sparsemem
With some memory model other than FLATMEM, the single node can
contains some holes so there might be many invalid pages. For
example, with two 256M memory and one 256M hole, some variables
(num_physpage, totalpages, nr_kernel_pages, nr_all_pages, etc.) will
indicate that there are 768MB on this system. This is not desired
because, for example, alloc_large_system_hash() allocates too many
entries.
Use free_area_init_node() with counted zholes_size[] instead of
free_area_init().
For num_physpages, use number of ram pages instead of max_low_pfn.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-07-06 17:26:02 +02:00
|
|
|
/* not usable memory */
|
|
|
|
continue;
|
2011-11-22 15:38:03 +01:00
|
|
|
}
|
[MIPS] Do not count pages in holes with sparsemem
With some memory model other than FLATMEM, the single node can
contains some holes so there might be many invalid pages. For
example, with two 256M memory and one 256M hole, some variables
(num_physpage, totalpages, nr_kernel_pages, nr_all_pages, etc.) will
indicate that there are 768MB on this system. This is not desired
because, for example, alloc_large_system_hash() allocates too many
entries.
Use free_area_init_node() with counted zholes_size[] instead of
free_area_init().
For num_physpages, use number of ram pages instead of max_low_pfn.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-07-06 17:26:02 +02:00
|
|
|
|
|
|
|
addr = PFN_UP(boot_mem_map.map[i].addr);
|
|
|
|
end = PFN_DOWN(boot_mem_map.map[i].addr +
|
|
|
|
boot_mem_map.map[i].size);
|
|
|
|
|
|
|
|
if (pagenr >= addr && pagenr < end)
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
void __init paging_init(void)
|
|
|
|
{
|
2007-11-03 03:05:43 +01:00
|
|
|
unsigned long max_zone_pfns[MAX_NR_ZONES];
|
2011-01-24 23:51:37 +01:00
|
|
|
unsigned long lastpfn __maybe_unused;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
pagetable_init();
|
|
|
|
|
|
|
|
#ifdef CONFIG_HIGHMEM
|
|
|
|
kmap_init();
|
|
|
|
#endif
|
2006-10-22 00:17:35 +02:00
|
|
|
kmap_coherent_init();
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2007-03-20 16:36:02 +01:00
|
|
|
#ifdef CONFIG_ZONE_DMA
|
2007-11-03 03:05:43 +01:00
|
|
|
max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN;
|
2005-04-17 00:20:36 +02:00
|
|
|
#endif
|
2007-11-03 03:05:43 +01:00
|
|
|
#ifdef CONFIG_ZONE_DMA32
|
|
|
|
max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN;
|
|
|
|
#endif
|
|
|
|
max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
|
|
|
|
lastpfn = max_low_pfn;
|
2005-04-17 00:20:36 +02:00
|
|
|
#ifdef CONFIG_HIGHMEM
|
2007-11-03 03:05:43 +01:00
|
|
|
max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
|
|
|
|
lastpfn = highend_pfn;
|
2006-12-06 16:48:28 +01:00
|
|
|
|
2007-11-03 03:05:43 +01:00
|
|
|
if (cpu_has_dc_aliases && max_low_pfn != highend_pfn) {
|
2006-12-06 16:48:28 +01:00
|
|
|
printk(KERN_WARNING "This processor doesn't support highmem."
|
2007-11-03 03:05:43 +01:00
|
|
|
" %ldk highmem ignored\n",
|
|
|
|
(highend_pfn - max_low_pfn) << (PAGE_SHIFT - 10));
|
|
|
|
max_zone_pfns[ZONE_HIGHMEM] = max_low_pfn;
|
|
|
|
lastpfn = max_low_pfn;
|
2006-12-06 16:48:28 +01:00
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
#endif
|
|
|
|
|
2007-11-03 03:05:43 +01:00
|
|
|
free_area_init_nodes(max_zone_pfns);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
2005-01-21 01:59:54 +01:00
|
|
|
#ifdef CONFIG_64BIT
|
|
|
|
static struct kcore_list kcore_kseg0;
|
|
|
|
#endif
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
void __init mem_init(void)
|
|
|
|
{
|
|
|
|
unsigned long codesize, reservedpages, datasize, initsize;
|
|
|
|
unsigned long tmp, ram;
|
|
|
|
|
|
|
|
#ifdef CONFIG_HIGHMEM
|
|
|
|
#ifdef CONFIG_DISCONTIGMEM
|
|
|
|
#error "CONFIG_HIGHMEM and CONFIG_DISCONTIGMEM dont work together yet"
|
|
|
|
#endif
|
2010-05-30 09:32:51 +02:00
|
|
|
max_mapnr = highend_pfn ? highend_pfn : max_low_pfn;
|
2005-04-17 00:20:36 +02:00
|
|
|
#else
|
[MIPS] Do not count pages in holes with sparsemem
With some memory model other than FLATMEM, the single node can
contains some holes so there might be many invalid pages. For
example, with two 256M memory and one 256M hole, some variables
(num_physpage, totalpages, nr_kernel_pages, nr_all_pages, etc.) will
indicate that there are 768MB on this system. This is not desired
because, for example, alloc_large_system_hash() allocates too many
entries.
Use free_area_init_node() with counted zholes_size[] instead of
free_area_init().
For num_physpages, use number of ram pages instead of max_low_pfn.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-07-06 17:26:02 +02:00
|
|
|
max_mapnr = max_low_pfn;
|
2005-04-17 00:20:36 +02:00
|
|
|
#endif
|
|
|
|
high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT);
|
|
|
|
|
|
|
|
totalram_pages += free_all_bootmem();
|
|
|
|
totalram_pages -= setup_zero_pages(); /* Setup zeroed pages. */
|
|
|
|
|
|
|
|
reservedpages = ram = 0;
|
|
|
|
for (tmp = 0; tmp < max_low_pfn; tmp++)
|
2011-11-22 15:38:03 +01:00
|
|
|
if (page_is_ram(tmp) && pfn_valid(tmp)) {
|
2005-04-17 00:20:36 +02:00
|
|
|
ram++;
|
2006-05-31 02:16:49 +02:00
|
|
|
if (PageReserved(pfn_to_page(tmp)))
|
2005-04-17 00:20:36 +02:00
|
|
|
reservedpages++;
|
|
|
|
}
|
[MIPS] Do not count pages in holes with sparsemem
With some memory model other than FLATMEM, the single node can
contains some holes so there might be many invalid pages. For
example, with two 256M memory and one 256M hole, some variables
(num_physpage, totalpages, nr_kernel_pages, nr_all_pages, etc.) will
indicate that there are 768MB on this system. This is not desired
because, for example, alloc_large_system_hash() allocates too many
entries.
Use free_area_init_node() with counted zholes_size[] instead of
free_area_init().
For num_physpages, use number of ram pages instead of max_low_pfn.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-07-06 17:26:02 +02:00
|
|
|
num_physpages = ram;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
#ifdef CONFIG_HIGHMEM
|
|
|
|
for (tmp = highstart_pfn; tmp < highend_pfn; tmp++) {
|
2007-11-04 05:42:03 +01:00
|
|
|
struct page *page = pfn_to_page(tmp);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
if (!page_is_ram(tmp)) {
|
|
|
|
SetPageReserved(page);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
ClearPageReserved(page);
|
2006-03-22 09:08:40 +01:00
|
|
|
init_page_count(page);
|
2005-04-17 00:20:36 +02:00
|
|
|
__free_page(page);
|
|
|
|
totalhigh_pages++;
|
|
|
|
}
|
|
|
|
totalram_pages += totalhigh_pages;
|
[MIPS] Do not count pages in holes with sparsemem
With some memory model other than FLATMEM, the single node can
contains some holes so there might be many invalid pages. For
example, with two 256M memory and one 256M hole, some variables
(num_physpage, totalpages, nr_kernel_pages, nr_all_pages, etc.) will
indicate that there are 768MB on this system. This is not desired
because, for example, alloc_large_system_hash() allocates too many
entries.
Use free_area_init_node() with counted zholes_size[] instead of
free_area_init().
For num_physpages, use number of ram pages instead of max_low_pfn.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-07-06 17:26:02 +02:00
|
|
|
num_physpages += totalhigh_pages;
|
2005-04-17 00:20:36 +02:00
|
|
|
#endif
|
|
|
|
|
|
|
|
codesize = (unsigned long) &_etext - (unsigned long) &_text;
|
|
|
|
datasize = (unsigned long) &_edata - (unsigned long) &_etext;
|
|
|
|
initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
|
|
|
|
|
2005-01-21 01:59:54 +01:00
|
|
|
#ifdef CONFIG_64BIT
|
|
|
|
if ((unsigned long) &_text > (unsigned long) CKSEG0)
|
|
|
|
/* The -4 is a hack so that user tools don't have to handle
|
|
|
|
the overflow. */
|
2009-09-23 01:45:43 +02:00
|
|
|
kclist_add(&kcore_kseg0, (void *) CKSEG0,
|
|
|
|
0x80000000 - 4, KCORE_TEXT);
|
2005-01-21 01:59:54 +01:00
|
|
|
#endif
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, "
|
|
|
|
"%ldk reserved, %ldk data, %ldk init, %ldk highmem)\n",
|
2009-09-22 02:02:36 +02:00
|
|
|
nr_free_pages() << (PAGE_SHIFT-10),
|
2005-04-17 00:20:36 +02:00
|
|
|
ram << (PAGE_SHIFT-10),
|
|
|
|
codesize >> 10,
|
|
|
|
reservedpages << (PAGE_SHIFT-10),
|
|
|
|
datasize >> 10,
|
|
|
|
initsize >> 10,
|
2010-01-08 23:42:31 +01:00
|
|
|
totalhigh_pages << (PAGE_SHIFT-10));
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
2005-06-25 23:54:31 +02:00
|
|
|
#endif /* !CONFIG_NEED_MULTIPLE_NODES */
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2006-12-29 16:43:59 +01:00
|
|
|
void free_init_pages(const char *what, unsigned long begin, unsigned long end)
|
2006-03-24 14:21:50 +01:00
|
|
|
{
|
2006-10-19 13:20:05 +02:00
|
|
|
unsigned long pfn;
|
2006-03-24 14:21:50 +01:00
|
|
|
|
2006-10-19 13:20:05 +02:00
|
|
|
for (pfn = PFN_UP(begin); pfn < PFN_DOWN(end); pfn++) {
|
|
|
|
struct page *page = pfn_to_page(pfn);
|
|
|
|
void *addr = phys_to_virt(PFN_PHYS(pfn));
|
|
|
|
|
|
|
|
ClearPageReserved(page);
|
|
|
|
init_page_count(page);
|
|
|
|
memset(addr, POISON_FREE_INITMEM, PAGE_SIZE);
|
|
|
|
__free_page(page);
|
2006-03-24 14:21:50 +01:00
|
|
|
totalram_pages++;
|
|
|
|
}
|
|
|
|
printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10);
|
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
|
|
void free_initrd_mem(unsigned long start, unsigned long end)
|
|
|
|
{
|
2006-10-19 13:20:05 +02:00
|
|
|
free_init_pages("initrd memory",
|
|
|
|
virt_to_phys((void *)start),
|
|
|
|
virt_to_phys((void *)end));
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2007-07-22 16:44:20 +02:00
|
|
|
void __init_refok free_initmem(void)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2006-12-29 16:43:59 +01:00
|
|
|
prom_free_prom_memory();
|
2006-10-19 13:20:05 +02:00
|
|
|
free_init_pages("unused kernel memory",
|
|
|
|
__pa_symbol(&__init_begin),
|
|
|
|
__pa_symbol(&__init_end));
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
2007-01-23 17:21:05 +01:00
|
|
|
|
2009-10-14 21:16:56 +02:00
|
|
|
#ifndef CONFIG_MIPS_PGD_C0_CONTEXT
|
2007-01-23 17:21:05 +01:00
|
|
|
unsigned long pgd_current[NR_CPUS];
|
2009-10-14 21:16:56 +02:00
|
|
|
#endif
|
2007-01-23 17:21:05 +01:00
|
|
|
/*
|
|
|
|
* On 64-bit we've got three-level pagetables with a slightly
|
|
|
|
* different layout ...
|
|
|
|
*/
|
|
|
|
#define __page_aligned(order) __attribute__((__aligned__(PAGE_SIZE<<order)))
|
2007-08-13 13:44:41 +02:00
|
|
|
|
|
|
|
/*
|
|
|
|
* gcc 3.3 and older have trouble determining that PTRS_PER_PGD and PGD_ORDER
|
|
|
|
* are constants. So we use the variants from asm-offset.h until that gcc
|
|
|
|
* will officially be retired.
|
|
|
|
*/
|
|
|
|
pgd_t swapper_pg_dir[_PTRS_PER_PGD] __page_aligned(_PGD_ORDER);
|
2009-12-04 22:52:36 +01:00
|
|
|
#ifndef __PAGETABLE_PMD_FOLDED
|
2007-01-23 17:21:05 +01:00
|
|
|
pmd_t invalid_pmd_table[PTRS_PER_PMD] __page_aligned(PMD_ORDER);
|
|
|
|
#endif
|
|
|
|
pte_t invalid_pte_table[PTRS_PER_PTE] __page_aligned(PTE_ORDER);
|