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/config.h"
   8 #include "linux/mm.h"
   9 #include "asm/uaccess.h"
  10 #include "mem_user.h"
  11 #include "kern_util.h"
  12 #include "user_util.h"
  13 #include "kern.h"
  14 #include "tt.h"
  15
  16 void before_mem_tt(unsigned long brk_start)
  17 {
  18         if(debug)
  19                 remap_data(UML_ROUND_DOWN(&_stext), UML_ROUND_UP(&_etext), 1);
  20         remap_data(UML_ROUND_DOWN(&_sdata), UML_ROUND_UP(&_edata), 1);
  21         remap_data(UML_ROUND_DOWN(&__bss_start), UML_ROUND_UP(&_end), 1);
  22 }
  23
  24 #define SIZE ((CONFIG_NEST_LEVEL + CONFIG_KERNEL_HALF_GIGS) * 0x20000000)
  25 #define START (CONFIG_TOP_ADDR - SIZE)
  26
  27 unsigned long set_task_sizes_tt(unsigned long *task_size_out)
  28 {
  29         unsigned long host_task_size;
  30
  31         /* Round up to the nearest 4M */
  32         host_task_size = ROUND_4M((unsigned long) &host_task_size);
  33         *task_size_out = START;
  34
  35         return host_task_size;
  36 }