2006-12-08 15:56:07 +01:00
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/*
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* Copyright IBM Corp. 2006
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* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
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*/
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#include <linux/bootmem.h>
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#include <linux/pfn.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/list.h>
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2008-04-30 13:38:46 +02:00
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#include <linux/hugetlb.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/slab.h>
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2006-12-08 15:56:07 +01:00
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#include <asm/pgalloc.h>
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#include <asm/pgtable.h>
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#include <asm/setup.h>
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#include <asm/tlbflush.h>
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2008-04-30 13:38:46 +02:00
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#include <asm/sections.h>
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2006-12-08 15:56:07 +01:00
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static DEFINE_MUTEX(vmem_mutex);
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struct memory_segment {
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struct list_head list;
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unsigned long start;
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unsigned long size;
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};
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static LIST_HEAD(mem_segs);
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2008-05-30 10:03:27 +02:00
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static void __ref *vmem_alloc_pages(unsigned int order)
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{
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if (slab_is_available())
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return (void *)__get_free_pages(GFP_KERNEL, order);
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return alloc_bootmem_pages((1 << order) * PAGE_SIZE);
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}
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static inline pud_t *vmem_pud_alloc(void)
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2008-02-09 18:24:36 +01:00
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{
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pud_t *pud = NULL;
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#ifdef CONFIG_64BIT
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2008-05-30 10:03:27 +02:00
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pud = vmem_alloc_pages(2);
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2008-02-09 18:24:36 +01:00
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if (!pud)
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return NULL;
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2008-04-30 13:38:44 +02:00
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clear_table((unsigned long *) pud, _REGION3_ENTRY_EMPTY, PAGE_SIZE * 4);
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2008-02-09 18:24:36 +01:00
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#endif
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return pud;
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}
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2007-10-22 12:52:48 +02:00
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2008-05-30 10:03:27 +02:00
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static inline pmd_t *vmem_pmd_alloc(void)
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2006-12-08 15:56:07 +01:00
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{
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2007-10-22 12:52:47 +02:00
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pmd_t *pmd = NULL;
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2006-12-08 15:56:07 +01:00
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2007-10-22 12:52:47 +02:00
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#ifdef CONFIG_64BIT
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2008-05-30 10:03:27 +02:00
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pmd = vmem_alloc_pages(2);
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2006-12-08 15:56:07 +01:00
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if (!pmd)
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return NULL;
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2008-04-30 13:38:44 +02:00
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clear_table((unsigned long *) pmd, _SEGMENT_ENTRY_EMPTY, PAGE_SIZE * 4);
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2007-10-22 12:52:47 +02:00
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#endif
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2006-12-08 15:56:07 +01:00
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return pmd;
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}
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2011-07-24 10:48:20 +02:00
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static pte_t __ref *vmem_pte_alloc(unsigned long address)
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2006-12-08 15:56:07 +01:00
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{
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2008-02-09 18:24:35 +01:00
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pte_t *pte;
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2006-12-08 15:56:07 +01:00
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2008-02-09 18:24:35 +01:00
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if (slab_is_available())
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2011-07-24 10:48:20 +02:00
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pte = (pte_t *) page_table_alloc(&init_mm, address);
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2008-02-09 18:24:35 +01:00
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else
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pte = alloc_bootmem(PTRS_PER_PTE * sizeof(pte_t));
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2006-12-08 15:56:07 +01:00
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if (!pte)
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return NULL;
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2010-04-09 13:43:01 +02:00
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clear_table((unsigned long *) pte, _PAGE_TYPE_EMPTY,
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PTRS_PER_PTE * sizeof(pte_t));
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2006-12-08 15:56:07 +01:00
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return pte;
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}
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/*
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* Add a physical memory range to the 1:1 mapping.
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*/
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2008-04-30 13:38:47 +02:00
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static int vmem_add_mem(unsigned long start, unsigned long size, int ro)
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2006-12-08 15:56:07 +01:00
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{
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2012-10-01 12:58:34 +02:00
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unsigned long end = start + size;
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unsigned long address = start;
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2006-12-08 15:56:07 +01:00
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pgd_t *pg_dir;
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2007-10-22 12:52:48 +02:00
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pud_t *pu_dir;
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2006-12-08 15:56:07 +01:00
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pmd_t *pm_dir;
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pte_t *pt_dir;
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int ret = -ENOMEM;
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2012-10-01 12:58:34 +02:00
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while (address < end) {
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2006-12-08 15:56:07 +01:00
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pg_dir = pgd_offset_k(address);
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if (pgd_none(*pg_dir)) {
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2007-10-22 12:52:48 +02:00
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pu_dir = vmem_pud_alloc();
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if (!pu_dir)
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goto out;
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2011-05-23 10:24:40 +02:00
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pgd_populate(&init_mm, pg_dir, pu_dir);
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2007-10-22 12:52:48 +02:00
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}
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pu_dir = pud_offset(pg_dir, address);
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2012-10-08 09:18:26 +02:00
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#if defined(CONFIG_64BIT) && !defined(CONFIG_DEBUG_PAGEALLOC)
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if (MACHINE_HAS_EDAT2 && pud_none(*pu_dir) && address &&
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!(address & ~PUD_MASK) && (address + PUD_SIZE <= end)) {
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2012-11-07 13:17:37 +01:00
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pud_val(*pu_dir) = __pa(address) |
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_REGION_ENTRY_TYPE_R3 | _REGION3_ENTRY_LARGE |
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(ro ? _REGION_ENTRY_RO : 0);
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2012-10-08 09:18:26 +02:00
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address += PUD_SIZE;
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continue;
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}
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#endif
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2007-10-22 12:52:48 +02:00
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if (pud_none(*pu_dir)) {
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2006-12-08 15:56:07 +01:00
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pm_dir = vmem_pmd_alloc();
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if (!pm_dir)
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goto out;
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2011-05-23 10:24:40 +02:00
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pud_populate(&init_mm, pu_dir, pm_dir);
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2006-12-08 15:56:07 +01:00
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}
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2007-10-22 12:52:48 +02:00
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pm_dir = pmd_offset(pu_dir, address);
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2012-08-21 12:36:34 +02:00
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#if defined(CONFIG_64BIT) && !defined(CONFIG_DEBUG_PAGEALLOC)
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2012-10-08 07:54:32 +02:00
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if (MACHINE_HAS_EDAT1 && pmd_none(*pm_dir) && address &&
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!(address & ~PMD_MASK) && (address + PMD_SIZE <= end)) {
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2012-11-07 13:17:37 +01:00
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pmd_val(*pm_dir) = __pa(address) |
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_SEGMENT_ENTRY | _SEGMENT_ENTRY_LARGE |
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(ro ? _SEGMENT_ENTRY_RO : 0);
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2012-10-01 12:58:34 +02:00
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address += PMD_SIZE;
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2008-04-30 13:38:46 +02:00
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continue;
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}
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#endif
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2006-12-08 15:56:07 +01:00
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if (pmd_none(*pm_dir)) {
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2011-07-24 10:48:20 +02:00
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pt_dir = vmem_pte_alloc(address);
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2006-12-08 15:56:07 +01:00
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if (!pt_dir)
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goto out;
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2011-05-23 10:24:40 +02:00
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pmd_populate(&init_mm, pm_dir, pt_dir);
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2006-12-08 15:56:07 +01:00
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}
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pt_dir = pte_offset_kernel(pm_dir, address);
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2012-11-07 13:17:37 +01:00
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pte_val(*pt_dir) = __pa(address) | (ro ? _PAGE_RO : 0);
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2012-10-01 12:58:34 +02:00
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address += PAGE_SIZE;
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2006-12-08 15:56:07 +01:00
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}
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ret = 0;
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out:
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2012-10-01 12:58:34 +02:00
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flush_tlb_kernel_range(start, end);
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2006-12-08 15:56:07 +01:00
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return ret;
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}
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/*
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* Remove a physical memory range from the 1:1 mapping.
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* Currently only invalidates page table entries.
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*/
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static void vmem_remove_range(unsigned long start, unsigned long size)
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{
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2012-10-01 12:58:34 +02:00
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unsigned long end = start + size;
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unsigned long address = start;
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2006-12-08 15:56:07 +01:00
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pgd_t *pg_dir;
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2007-10-22 12:52:48 +02:00
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pud_t *pu_dir;
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2006-12-08 15:56:07 +01:00
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pmd_t *pm_dir;
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pte_t *pt_dir;
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pte_t pte;
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pte_val(pte) = _PAGE_TYPE_EMPTY;
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2012-10-01 12:58:34 +02:00
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while (address < end) {
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2006-12-08 15:56:07 +01:00
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pg_dir = pgd_offset_k(address);
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2012-10-08 07:54:32 +02:00
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if (pgd_none(*pg_dir)) {
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address += PGDIR_SIZE;
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continue;
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}
|
2007-10-22 12:52:48 +02:00
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pu_dir = pud_offset(pg_dir, address);
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2012-10-08 07:54:32 +02:00
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if (pud_none(*pu_dir)) {
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address += PUD_SIZE;
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2006-12-08 15:56:07 +01:00
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continue;
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2012-10-08 07:54:32 +02:00
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}
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2012-10-08 09:18:26 +02:00
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if (pud_large(*pu_dir)) {
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pud_clear(pu_dir);
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address += PUD_SIZE;
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continue;
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}
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2007-10-22 12:52:48 +02:00
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pm_dir = pmd_offset(pu_dir, address);
|
2012-10-08 07:54:32 +02:00
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if (pmd_none(*pm_dir)) {
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address += PMD_SIZE;
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2006-12-08 15:56:07 +01:00
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continue;
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2012-10-08 07:54:32 +02:00
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}
|
2012-10-01 12:58:34 +02:00
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if (pmd_large(*pm_dir)) {
|
2011-05-23 10:24:40 +02:00
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pmd_clear(pm_dir);
|
2012-10-01 12:58:34 +02:00
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address += PMD_SIZE;
|
2008-04-30 13:38:46 +02:00
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continue;
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}
|
2006-12-08 15:56:07 +01:00
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pt_dir = pte_offset_kernel(pm_dir, address);
|
2007-02-05 21:18:17 +01:00
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*pt_dir = pte;
|
2012-10-01 12:58:34 +02:00
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address += PAGE_SIZE;
|
2006-12-08 15:56:07 +01:00
|
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}
|
2012-10-01 12:58:34 +02:00
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flush_tlb_kernel_range(start, end);
|
2006-12-08 15:56:07 +01:00
|
|
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}
|
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|
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/*
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* Add a backed mem_map array to the virtual mem_map array.
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*/
|
2013-04-30 00:07:50 +02:00
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int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node)
|
2006-12-08 15:56:07 +01:00
|
|
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{
|
2013-04-30 00:07:50 +02:00
|
|
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unsigned long address = start;
|
2006-12-08 15:56:07 +01:00
|
|
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pgd_t *pg_dir;
|
2007-10-22 12:52:48 +02:00
|
|
|
pud_t *pu_dir;
|
2006-12-08 15:56:07 +01:00
|
|
|
pmd_t *pm_dir;
|
|
|
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pte_t *pt_dir;
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|
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int ret = -ENOMEM;
|
|
|
|
|
2013-04-30 00:07:50 +02:00
|
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for (address = start; address < end;) {
|
2006-12-08 15:56:07 +01:00
|
|
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pg_dir = pgd_offset_k(address);
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|
|
|
if (pgd_none(*pg_dir)) {
|
2007-10-22 12:52:48 +02:00
|
|
|
pu_dir = vmem_pud_alloc();
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|
|
|
if (!pu_dir)
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|
goto out;
|
2011-05-23 10:24:40 +02:00
|
|
|
pgd_populate(&init_mm, pg_dir, pu_dir);
|
2007-10-22 12:52:48 +02:00
|
|
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}
|
|
|
|
|
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pu_dir = pud_offset(pg_dir, address);
|
|
|
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if (pud_none(*pu_dir)) {
|
2006-12-08 15:56:07 +01:00
|
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pm_dir = vmem_pmd_alloc();
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|
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if (!pm_dir)
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goto out;
|
2011-05-23 10:24:40 +02:00
|
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pud_populate(&init_mm, pu_dir, pm_dir);
|
2006-12-08 15:56:07 +01:00
|
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}
|
|
|
|
|
2007-10-22 12:52:48 +02:00
|
|
|
pm_dir = pmd_offset(pu_dir, address);
|
2006-12-08 15:56:07 +01:00
|
|
|
if (pmd_none(*pm_dir)) {
|
2012-10-17 12:18:05 +02:00
|
|
|
#ifdef CONFIG_64BIT
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|
|
|
/* Use 1MB frames for vmemmap if available. We always
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|
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|
* use large frames even if they are only partially
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* used.
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|
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* Otherwise we would have also page tables since
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* vmemmap_populate gets called for each section
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* separately. */
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|
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if (MACHINE_HAS_EDAT1) {
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void *new_page;
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|
|
|
|
|
|
new_page = vmemmap_alloc_block(PMD_SIZE, node);
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|
|
if (!new_page)
|
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|
|
goto out;
|
2012-11-07 13:17:37 +01:00
|
|
|
pmd_val(*pm_dir) = __pa(new_page) |
|
2013-02-16 12:42:35 +01:00
|
|
|
_SEGMENT_ENTRY | _SEGMENT_ENTRY_LARGE |
|
|
|
|
_SEGMENT_ENTRY_CO;
|
2012-10-17 12:18:05 +02:00
|
|
|
address = (address + PMD_SIZE) & PMD_MASK;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
#endif
|
2011-07-24 10:48:20 +02:00
|
|
|
pt_dir = vmem_pte_alloc(address);
|
2006-12-08 15:56:07 +01:00
|
|
|
if (!pt_dir)
|
|
|
|
goto out;
|
2011-05-23 10:24:40 +02:00
|
|
|
pmd_populate(&init_mm, pm_dir, pt_dir);
|
2012-10-17 12:18:05 +02:00
|
|
|
} else if (pmd_large(*pm_dir)) {
|
|
|
|
address = (address + PMD_SIZE) & PMD_MASK;
|
|
|
|
continue;
|
2006-12-08 15:56:07 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
pt_dir = pte_offset_kernel(pm_dir, address);
|
|
|
|
if (pte_none(*pt_dir)) {
|
|
|
|
unsigned long new_page;
|
|
|
|
|
2008-05-30 10:03:27 +02:00
|
|
|
new_page =__pa(vmem_alloc_pages(0));
|
2006-12-08 15:56:07 +01:00
|
|
|
if (!new_page)
|
|
|
|
goto out;
|
2012-11-07 13:17:37 +01:00
|
|
|
pte_val(*pt_dir) = __pa(new_page);
|
2006-12-08 15:56:07 +01:00
|
|
|
}
|
2012-10-17 12:18:05 +02:00
|
|
|
address += PAGE_SIZE;
|
2006-12-08 15:56:07 +01:00
|
|
|
}
|
2013-04-30 00:07:50 +02:00
|
|
|
memset((void *)start, 0, end - start);
|
2006-12-08 15:56:07 +01:00
|
|
|
ret = 0;
|
|
|
|
out:
|
2013-04-30 00:07:50 +02:00
|
|
|
flush_tlb_kernel_range(start, end);
|
2006-12-08 15:56:07 +01:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2013-04-30 00:07:50 +02:00
|
|
|
void vmemmap_free(unsigned long start, unsigned long end)
|
2013-02-23 01:33:08 +01:00
|
|
|
{
|
|
|
|
}
|
|
|
|
|
2006-12-08 15:56:07 +01:00
|
|
|
/*
|
|
|
|
* Add memory segment to the segment list if it doesn't overlap with
|
|
|
|
* an already present segment.
|
|
|
|
*/
|
|
|
|
static int insert_memory_segment(struct memory_segment *seg)
|
|
|
|
{
|
|
|
|
struct memory_segment *tmp;
|
|
|
|
|
2008-06-10 10:03:20 +02:00
|
|
|
if (seg->start + seg->size > VMEM_MAX_PHYS ||
|
2006-12-08 15:56:07 +01:00
|
|
|
seg->start + seg->size < seg->start)
|
|
|
|
return -ERANGE;
|
|
|
|
|
|
|
|
list_for_each_entry(tmp, &mem_segs, list) {
|
|
|
|
if (seg->start >= tmp->start + tmp->size)
|
|
|
|
continue;
|
|
|
|
if (seg->start + seg->size <= tmp->start)
|
|
|
|
continue;
|
|
|
|
return -ENOSPC;
|
|
|
|
}
|
|
|
|
list_add(&seg->list, &mem_segs);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Remove memory segment from the segment list.
|
|
|
|
*/
|
|
|
|
static void remove_memory_segment(struct memory_segment *seg)
|
|
|
|
{
|
|
|
|
list_del(&seg->list);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __remove_shared_memory(struct memory_segment *seg)
|
|
|
|
{
|
|
|
|
remove_memory_segment(seg);
|
|
|
|
vmem_remove_range(seg->start, seg->size);
|
|
|
|
}
|
|
|
|
|
2008-04-30 13:38:47 +02:00
|
|
|
int vmem_remove_mapping(unsigned long start, unsigned long size)
|
2006-12-08 15:56:07 +01:00
|
|
|
{
|
|
|
|
struct memory_segment *seg;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
mutex_lock(&vmem_mutex);
|
|
|
|
|
|
|
|
ret = -ENOENT;
|
|
|
|
list_for_each_entry(seg, &mem_segs, list) {
|
|
|
|
if (seg->start == start && seg->size == size)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (seg->start != start || seg->size != size)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
ret = 0;
|
|
|
|
__remove_shared_memory(seg);
|
|
|
|
kfree(seg);
|
|
|
|
out:
|
|
|
|
mutex_unlock(&vmem_mutex);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2008-04-30 13:38:47 +02:00
|
|
|
int vmem_add_mapping(unsigned long start, unsigned long size)
|
2006-12-08 15:56:07 +01:00
|
|
|
{
|
|
|
|
struct memory_segment *seg;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
mutex_lock(&vmem_mutex);
|
|
|
|
ret = -ENOMEM;
|
|
|
|
seg = kzalloc(sizeof(*seg), GFP_KERNEL);
|
|
|
|
if (!seg)
|
|
|
|
goto out;
|
|
|
|
seg->start = start;
|
|
|
|
seg->size = size;
|
|
|
|
|
|
|
|
ret = insert_memory_segment(seg);
|
|
|
|
if (ret)
|
|
|
|
goto out_free;
|
|
|
|
|
2008-04-30 13:38:46 +02:00
|
|
|
ret = vmem_add_mem(start, size, 0);
|
2006-12-08 15:56:07 +01:00
|
|
|
if (ret)
|
|
|
|
goto out_remove;
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
out_remove:
|
|
|
|
__remove_shared_memory(seg);
|
|
|
|
out_free:
|
|
|
|
kfree(seg);
|
|
|
|
out:
|
|
|
|
mutex_unlock(&vmem_mutex);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* map whole physical memory to virtual memory (identity mapping)
|
2008-01-26 14:11:00 +01:00
|
|
|
* we reserve enough space in the vmalloc area for vmemmap to hotplug
|
|
|
|
* additional memory segments.
|
2006-12-08 15:56:07 +01:00
|
|
|
*/
|
|
|
|
void __init vmem_map_init(void)
|
|
|
|
{
|
2008-04-30 13:38:46 +02:00
|
|
|
unsigned long ro_start, ro_end;
|
|
|
|
unsigned long start, end;
|
2006-12-08 15:56:07 +01:00
|
|
|
int i;
|
|
|
|
|
2012-10-04 17:02:02 +02:00
|
|
|
ro_start = PFN_ALIGN((unsigned long)&_stext);
|
|
|
|
ro_end = (unsigned long)&_eshared & PAGE_MASK;
|
2013-04-30 19:19:58 +02:00
|
|
|
for (i = 0; i < MEMORY_CHUNKS; i++) {
|
|
|
|
if (!memory_chunk[i].size)
|
2011-10-30 15:16:40 +01:00
|
|
|
continue;
|
2008-04-30 13:38:46 +02:00
|
|
|
start = memory_chunk[i].addr;
|
|
|
|
end = memory_chunk[i].addr + memory_chunk[i].size;
|
|
|
|
if (start >= ro_end || end <= ro_start)
|
|
|
|
vmem_add_mem(start, end - start, 0);
|
|
|
|
else if (start >= ro_start && end <= ro_end)
|
|
|
|
vmem_add_mem(start, end - start, 1);
|
|
|
|
else if (start >= ro_start) {
|
|
|
|
vmem_add_mem(start, ro_end - start, 1);
|
|
|
|
vmem_add_mem(ro_end, end - ro_end, 0);
|
|
|
|
} else if (end < ro_end) {
|
|
|
|
vmem_add_mem(start, ro_start - start, 0);
|
|
|
|
vmem_add_mem(ro_start, end - ro_start, 1);
|
|
|
|
} else {
|
|
|
|
vmem_add_mem(start, ro_start - start, 0);
|
|
|
|
vmem_add_mem(ro_start, ro_end - ro_start, 1);
|
|
|
|
vmem_add_mem(ro_end, end - ro_end, 0);
|
|
|
|
}
|
|
|
|
}
|
2006-12-08 15:56:07 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Convert memory chunk array to a memory segment list so there is a single
|
|
|
|
* list that contains both r/w memory and shared memory segments.
|
|
|
|
*/
|
|
|
|
static int __init vmem_convert_memory_chunk(void)
|
|
|
|
{
|
|
|
|
struct memory_segment *seg;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
mutex_lock(&vmem_mutex);
|
2008-01-26 14:11:02 +01:00
|
|
|
for (i = 0; i < MEMORY_CHUNKS; i++) {
|
2006-12-08 15:56:07 +01:00
|
|
|
if (!memory_chunk[i].size)
|
|
|
|
continue;
|
|
|
|
seg = kzalloc(sizeof(*seg), GFP_KERNEL);
|
|
|
|
if (!seg)
|
|
|
|
panic("Out of memory...\n");
|
|
|
|
seg->start = memory_chunk[i].addr;
|
|
|
|
seg->size = memory_chunk[i].size;
|
|
|
|
insert_memory_segment(seg);
|
|
|
|
}
|
|
|
|
mutex_unlock(&vmem_mutex);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
core_initcall(vmem_convert_memory_chunk);
|