arch/arm-native/ceboot/bootmem.c

   1 /*
   2     Copyright © 1995-2014, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #include <windows.h>
   7
   8 #include <runtime.h>
   9 #include "bootmem.h"
  10 #include "winapi.h"
  11
  12 /* Size of bootinfo buffer - one page */
  13 #define BOOTMEM_SIZE 4096
  14
  15 static void *bootmem_Virt;
  16 static void *bootmem_Limit;
  17 ULONG_PTR bootmem_Phys;
  18
  19 ULONG_PTR InitBootMem(void)
  20 {
  21     bootmem_Virt = AllocPhysMem(BOOTMEM_SIZE, PAGE_READWRITE, 0, 0, &bootmem_Phys);
  22
  23     if (bootmem_Virt)
  24     {
  25         bootmem_Limit = bootmem_Virt + BOOTMEM_SIZE;
  26         /* This routine returns PHYSICAL address */
  27         return bootmem_Phys;
  28     }
  29     else
  30         return 0;
  31 }
  32
  33 void *AllocBootMem(unsigned int size)
  34 {
  35     void *ptr = bootmem_Virt;
  36
  37     /* Align size at pointer boundary */
  38     size = (size + sizeof(void *) - 1) & (~(sizeof(void *) - 1));
  39     if (bootmem_Limit - ptr < size)
  40     {
  41         DisplayError("Not enough memory to build boot information (%d bytes requested)", size);
  42         exit(0); /* I'm tired to write those if's... */
  43     }
  44
  45     bootmem_Virt += size;
  46     bootmem_Phys += size;
  47
  48     return ptr;
  49 }
  50
  51 void *AddTag(unsigned int tag, ULONG_PTR data)
  52 {
  53     ULONG_PTR *ptr = AllocBootMem(sizeof(ULONG_PTR) * 2);
  54
  55     ptr[0] = tag;
  56     ptr[1] = data;
  57
  58     return ptr;
  59 }