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1) uml kernel bootmem managed through bootmem_data->node_bootmem_map, not the struct page array, so the array is unnecessary. 2) the bootmem struct page array has been pointed by a *local* pointer, struct page *map, in init_maps function. The array can be accessed only in init_maps's scope. As a result, uml kernel wastes about 1% of total memory. Signed-off-by: Honggang Li <enjoymindful@gmail.com> Signed-off-by: Richard Weinberger <richard@nod.at>
63 lines
2.4 KiB
C
63 lines
2.4 KiB
C
/*
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* arch/um/include/mem_user.h
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*
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* BRIEF MODULE DESCRIPTION
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* user side memory interface for support IO memory inside user mode linux
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*
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* Copyright (C) 2001 RidgeRun, Inc.
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* Author: RidgeRun, Inc.
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* Greg Lonnon glonnon@ridgerun.com or info@ridgerun.com
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef _MEM_USER_H
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#define _MEM_USER_H
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struct iomem_region {
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struct iomem_region *next;
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char *driver;
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int fd;
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int size;
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unsigned long phys;
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unsigned long virt;
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};
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extern struct iomem_region *iomem_regions;
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extern int iomem_size;
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#define ROUND_4M(n) ((((unsigned long) (n)) + (1 << 22)) & ~((1 << 22) - 1))
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extern int init_mem_user(void);
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extern void setup_memory(void *entry);
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extern unsigned long find_iomem(char *driver, unsigned long *len_out);
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extern void mem_total_pages(unsigned long physmem, unsigned long iomem,
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unsigned long highmem);
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extern unsigned long get_vm(unsigned long len);
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extern void setup_physmem(unsigned long start, unsigned long usable,
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unsigned long len, unsigned long long highmem);
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extern void add_iomem(char *name, int fd, unsigned long size);
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extern unsigned long phys_offset(unsigned long phys);
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extern void map_memory(unsigned long virt, unsigned long phys,
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unsigned long len, int r, int w, int x);
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#endif
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