/*
 * Two Levels Segregate Fit memory allocator (TLSF)
 * Version 1.3
 *
 * Written by Miguel Masmano Tello <mmasmano@disca.upv.es>
 * Copyright (C) Dec, 2002 OCERA Consortium
 * Release under the terms of the GNU General Public License Version 2
 *
 */

/* 
   This file contains wrappers to use TLSF from RTLinux 

   - init_malloc: 
     
   It creates an empty buffer  of "max_size" Kbytes which will be used
   through rtl_malloc, rtl_free, rtl_realloc by RTLinux applications.
   
   Since this function uses vmalloc, a non real-time safe function, it
   must be called in a secure way (from a init_module function)
   

   - cleanup_malloc:
   
   It destroy a previously  allocated buffer using the kernel function
   "vfree"

   Like vmalloc, vfree is not a  secure function either so it only can
   be executed in a secure way (i.e. cleanup_module)
   
 */

#include <rtl.h>

#include <linux/vmalloc.h>

#include "rtl_malloc.h"
#include "TLSF_nondep.h"

static int max_size = 2048; // 2 MByte
static unsigned char *ptr_mem;

int init_malloc(void){
  // First of all we reserve the memory that will be used later
  ptr_mem = (unsigned char *) vmalloc (max_size * 1024);
  if (!ptr_mem) {
    rtl_printf ("rtl_malloc PANIC: Error reserving memory!!");
    return -1;
  }
  memset(ptr_mem, 0x00, max_size * 1024);
  if (init_memory_pool (0, 5, max_size, ptr_mem) < 0) return -1;
  associate_buffer (ptr_mem);
  return 0;
}

void cleanup_malloc(void){
  destroy_memory_pool(ptr_mem);
  vfree (ptr_mem); 
}