Import of the contiki-2.x development code from the SICS internal CVS server

core/loader/elfloader-msp430.c

@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2005, Swedish Institute of Computer Science
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This file is part of the Contiki operating system.
+ *
+ * @(#)$Id: elfloader-msp430.c,v 1.1 2006/06/17 22:41:18 adamdunkels Exp $
+ */
+#include "elfloader-arch.h"
+
+#include "dev/flash.h"
+
+static char datamemory[ELFLOADER_DATAMEMORY_SIZE];
+static const char textmemory[ELFLOADER_TEXTMEMORY_SIZE] = {0};
+/*---------------------------------------------------------------------------*/
+void *
+elfloader_arch_allocate_ram(int size)
+{
+  return datamemory;
+}
+/*---------------------------------------------------------------------------*/
+void *
+elfloader_arch_allocate_rom(int size)
+{
+  /* Return an 512-byte aligned pointer. */
+  return (char *)
+    ((unsigned long)&textmemory[0] & 0xfffffe00) +
+    (((unsigned long)&textmemory[0] & 0x1ff) == 0? 0: 0x200);
+}
+/*---------------------------------------------------------------------------*/
+#define READSIZE 32
+void
+elfloader_arch_write_text(int fd, unsigned int size, char *mem)
+{
+  int i;
+  unsigned int ptr;
+  unsigned short *flashptr;
+  
+  flash_setup();
+
+  flashptr = (unsigned short *)mem;
+  
+  for(ptr = 0; ptr < size; ptr += READSIZE) {
+    
+    /* Read data from file into RAM. */
+    cfs_read(fd, (unsigned char *)datamemory, READSIZE);
+
+    /* Clear flash page on 512 byte boundary. */
+    if((((unsigned short)flashptr) & 0x01ff) == 0) {
+      flash_clear(flashptr);
+    }
+    
+    /* Burn data from RAM into flash ROM. Flash is burned one 16-bit
+       word at a time, so we need to be careful when incrementing
+       pointers. The flashptr is already a short pointer, so
+       incrementing it by one will actually increment the address by
+       two. */
+    for(i = 0; i < READSIZE / 2; ++i) {
+      flash_write(flashptr, ((unsigned short *)datamemory)[i]);
+      ++flashptr;
+    }
+  }
+
+  flash_done();
+}
+/*---------------------------------------------------------------------------*/
+void
+elfloader_arch_relocate(int fd, unsigned int sectionoffset,
+			struct elf32_rela *rela, char *addr)
+{
+  addr += rela->r_addend;
+  
+  cfs_seek(fd, sectionoffset + rela->r_offset);  
+  cfs_write(fd, (char *)&addr, 2);
+}
+/*---------------------------------------------------------------------------*/