arch/um/kernel/tt/mem.c

   1 /*
   2  * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #include "linux/stddef.h"
   7 #include "linux/mm.h"
   8 #include "asm/uaccess.h"
   9 #include "mem_user.h"
  10 #include "kern_util.h"
  11 #include "kern.h"
  12 #include "tt.h"
  13
  14 void before_mem_tt(unsigned long brk_start)
  15 {
  16         if(debug)
  17                 remap_data(UML_ROUND_DOWN(&_stext), UML_ROUND_UP(&_etext), 1);
  18         remap_data(UML_ROUND_DOWN(&_sdata), UML_ROUND_UP(&_edata), 1);
  19         remap_data(UML_ROUND_DOWN(&__bss_start), UML_ROUND_UP(&_end), 1);
  20 }
  21
  22 #define SIZE ((CONFIG_NEST_LEVEL + CONFIG_KERNEL_HALF_GIGS) * 0x20000000)
  23 #define START (CONFIG_TOP_ADDR - SIZE)
  24
  25 unsigned long set_task_sizes_tt(unsigned long *task_size_out)
  26 {
  27         unsigned long host_task_size;
  28
  29         /* Round up to the nearest 4M */
  30         host_task_size = ROUND_4M((unsigned long) &host_task_size);
  31         *task_size_out = START;
  32
  33         return host_task_size;
  34 }