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From: cvs at opencores.org<cvs@o...>
Date: Mon Jan 28 03:38:03 CET 2008
Subject: [cvs-checkins] MODIFIED: mlite ...
Date: 00/08/01 28:03:38

Modified: mlite/tools bootldr.c
Log:
Support boot from flash


Revision Changes Path
1.4 mlite/tools/bootldr.c

http://www.opencores.org/cvsweb.shtml/mlite/tools/bootldr.c.diff?r1=1.3&r2=1.4

(In the diff below, changes in quantity of whitespace are not shown.)

Index: bootldr.c
===================================================================
RCS file: /cvsroot/rhoads/mlite/tools/bootldr.c,v
retrieving revision 1.3
retrieving revision 1.4
diff -u -b -r1.3 -r1.4
--- bootldr.c 15 Dec 2007 16:21:16 -0000 1.3
+++ bootldr.c 28 Jan 2008 02:38:03 -0000 1.4
@@ -1,4 +1,14 @@
-/* bootldr.c */
+/*--------------------------------------------------------------------
+ * TITLE: Plasma Bootloader
+ * AUTHOR: Steve Rhoads (rhoadss@y...)
+ * DATE CREATED: 12/17/05
+ * FILENAME: bootldr.c
+ * PROJECT: Plasma CPU core
+ * COPYRIGHT: Software placed into the public domain by the author.
+ * Software 'as is' without warranty. Author liable for nothing.
+ * DESCRIPTION:
+ * Plasma bootloader.
+ *--------------------------------------------------------------------*/
#include "plasma.h"

#define MemoryRead(A) (*(volatile unsigned long*)(A))
@@ -11,6 +21,45 @@
extern int DdrInit(void);

typedef void (*FuncPtr)(void);
+typedef unsigned long uint32;
+typedef unsigned short uint16;
+
+
+void FlashRead(uint16 *dst, uint32 byteOffset, int bytes)
+{
+ volatile uint32 *ptr=(uint32*)(FLASH_BASE + (byteOffset << 1));
+ *ptr = 0xff; //read mode
+ while(bytes > 0)
+ {
+ *dst++ = (uint16)*ptr++;
+ bytes -= 2;
+ }
+}
+
+
+void FlashWrite(uint16 *src, uint32 byteOffset, int bytes)
+{
+ volatile uint32 *ptr=(uint32*)(FLASH_BASE + (byteOffset << 1));
+ while(bytes > 0)
+ {
+ *ptr = 0x40; //write mode
+ *ptr++ = *src++; //write data
+ while((*ptr & 0x80) == 0) //check status
+ ;
+ bytes -= 2;
+ }
+}
+
+
+void FlashErase(uint32 byteOffset)
+{
+ volatile uint32 *ptr=(uint32*)(FLASH_BASE + (byteOffset << 1));
+ *ptr = 0x20; //erase block
+ *ptr = 0xd0; //confirm
+ while((*ptr & 0x80) == 0) //check status
+ ;
+}
+

char *xtoa(unsigned long num)
{
@@ -26,6 +75,7 @@
return buf;
}

+
unsigned long getnum(void)
{
int i;
@@ -62,6 +112,7 @@
return value;
}

+
int main(void)
{
int i, j, ch;
@@ -76,6 +127,14 @@
puts(" ");
puts(__TIME__); puts(":\n"); + MemoryWrite(FLASH_BASE, 0xff); //read mode + if((MemoryRead(GPIOA_IN) & 1) && (MemoryRead(FLASH_BASE) & 0xffff) == 0x3c1c) + { + puts("Boot from flash\n"); + FlashRead((uint16*)RAM_EXTERNAL_BASE, 0, 1024*128); + funcPtr = (FuncPtr)RAM_EXTERNAL_BASE; + funcPtr(); + } for(;;) { puts("\nWaiting for binary image linked at 0x10000000\n"); @@ -89,6 +148,7 @@ puts("7. Raw memory write\n"); puts("8. Checksum\n"); puts("9. Dump\n"); + puts("F. Copy 128KB from DDR to flash\n"); puts("> "); ch = getch(); address = 0; @@ -132,8 +192,6 @@ case '6': puts("\nCount in hex> "); count = getnum(); - //puts(xtoa(count)); - //puts("\n"); for(i = 0; i < count; ++i) { ch = *(unsigned char*)(address + i); @@ -143,8 +201,6 @@ case '7': puts("\nCount in hex> "); count = getnum(); - //puts(xtoa(count)); - //putchar('\n'); for(i = 0; i < count; ++i) { ch = getch(); @@ -176,6 +232,10 @@ } puts("\r\n"); break; + case 'F': + FlashErase(0); + FlashWrite((uint16*)RAM_EXTERNAL_BASE, 0, 1024*128); + break; case 0x3c: //raw test.bin file ptr1 = (unsigned char*)0x10000000; for(i = 0; i < 1024*1024; ++i)