Changeset 704 for trunk/softs/tsar_boot/src

Timestamp:

May 27, 2014, 4:43:09 PM (10 years ago)

Author:

alain

Message:

tsar_boot:

• Erasing unused constant in defs.h
• Modofication in IO access functions to allow addressing in clusters using physical address extension

Location:

trunk/softs/tsar_boot/src

Files:

• reset.S (modified) (1 diff)
• reset_tty.c (modified) (4 diffs)

trunk/softs/tsar_boot/src/reset.S

@@ -12 +12 @@
  * by the seg_reset_stack_base parameters in ldscript, of size 0x10000 (64k)
  * - Processor 0 uses a larger stack:         64 Kbytes.
- * - Other processors use a smaller stack:    512 bytes.
- *     => the stack size cannot be smaller than 0x90000 bytes (576 K).
+ * - Other processors use a smaller stack:    256 bytes.
+ *     => the seg_stack_size cannot be smaller than 0x50000 bytes (320 Kytes).
+ *         (64K + 1024 * 256 = 320 Kbytes)
  * Those stacks can be used by both the preloader and the boot-loader code.
  * 

trunk/softs/tsar_boot/src/reset_tty.c

@@ +1 @@
+/********************************************************************
+ * \file    reset_tty.c
+ * \date    5 mars 2014
+ * \author  Cesar Fuguet 
+ *
+ * Minimal driver for TTY controler 
+ *******************************************************************/
+
 #include <reset_tty.h>
 #include <io.h>
@@ -7 +15 @@
 {
     unsigned int* tty_address = (unsigned int*) TTY_PADDR_BASE;
-    if (ioread32(&tty_address[TTY_STATUS]) == 0)
-        return 0;
 
-    *c = ioread32(&tty_address[TTY_READ]);
+    if (ioread32( &tty_address[TTY_STATUS] ) == 0) return 0;
+    *c = ioread32( &tty_address[TTY_READ] );
     return 1;
 }
@@ -18 +25 @@
 {
     unsigned int* tty_address = (unsigned int*) TTY_PADDR_BASE;
-    iowrite32(&tty_address[TTY_WRITE], (unsigned int)c);
 
-    if (c == '\n')
-    {
-        iowrite32(&tty_address[TTY_WRITE], (unsigned int)'\r');
-    }
+    iowrite32( &tty_address[TTY_WRITE], (unsigned int)c );
+    if (c == '\n') reset_putc( '\r' );
 }
 
@@ -34 +38 @@
     {
         if (buffer[n] == 0) break;
-
         reset_putc(buffer[n]);
     }