Fixing cai9n loader for lm32 errors

lm32/logic/sakc/firmware/cain_loader/Makefile

@@ -25,7 +25,7 @@ xmodem.o: xmodem.c
 	$(LM32_CC) $(CFLAGS) -c xmodem.c
 
 image: crt0ram.o main.o soc-hw.o xmodem.o
-	$(LM32_LD) $(LDFLAGS) -Map image.map -N -o image crt0ram.o main.o soc-hw.o  xmodem.o
+	$(LM32_LD) $(LDFLAGS) -Map image.map -N -o image crt0ram.o main.o soc-hw.o xmodem.o
 
 image.lst: image
 	$(LM32_OBJDUMP) -h -S $< > $@
@@ -44,7 +44,7 @@ $(VRAMFILE): image.srec
 	$(SREC2VRAM) image.srec 0x00000000 0x1000 > $(VRAMFILE)
 
 clean:
-	rm -f image image.lst image.bin image.srec image.map image.ram  *.o *.d
+	rm -f image image.lst image.bin image.srec image.map  *.o *.d *.bin
 
 DEPS := $(wildcard *.d)
 ifneq ($(DEPS),)

lm32/logic/sakc/firmware/cain_loader/main.c

@@ -0,0 +1,114 @@
+/**
+ * Primitive first stage bootloader 
+ *
+ *
+ */
+#include "soc-hw.h"
+
+/* prototypes */
+uint32_t read_uint32()
+{
+	uint32_t val = 0, i;
+
+    for (i = 0; i < 4; i++) {
+        val <<= 8;
+        val += (uint8_t)uart_getchar();
+    }
+
+    return val;
+}
+
+void hexprint(unsigned int hexval)
+{
+  int digit[8], pos;
+  uart_putstr("0x");
+  for(pos = 0; pos < 8; pos++)
+    {
+      digit[pos] = (hexval & 0xF);  /* last hexit */
+      hexval = hexval >> 4;
+    }
+  for(pos = 7; pos > -1; pos--)
+    {
+      if(digit[pos] < 0xA)
+        uart_putstr((char *)digit[pos] + '0');
+      else
+        uart_putstr((char *)digit[pos] + 'A' - 10);
+    }
+  uart_putchar(' ');
+}
+
+
+int main(int argc, char **argv)
+{
+	int8_t  *p;
+	uint8_t  c;
+	int key, len, autoboot = 1, dispmenu = 1;
+
+	// Initialize UART
+	uart_init();
+
+
+
+
+  while(1){ /* loop forever until u-boot gets booted or the board is reset */
+    if(dispmenu){
+     uart_putstr("\n1: Upload program to RAM\r\n");
+//      uart_putstr("2: Upload u-boot to Dataflash\r\n");
+//      uart_putstr("3: Upload Kernel to Dataflash\r\n");
+//      uart_putstr("4: Start u-boot\r\n");
+//      uart_putstr("5: Upload Filesystem image\r\n");
+//      uart_putstr("6: Memory test\r\n");
+      dispmenu = 0;
+    }
+
+      key = uart_getchar();
+      autoboot = 0;
+
+    if(key == '1'){
+      len = rxmodem((unsigned char *)0x2000);
+      uart_putstr("Received ");
+      hexprint(len);
+      uart_putstr(" bytes\r\n");
+//      jump(0x1000);
+      dispmenu = 1;
+    }
+    else{
+      uart_putstr("Invalid input\r\n");
+      dispmenu = 1;
+    }
+
+
+
+  }
+
+
+
+	c = '*'; // print msg on first iteration
+	for(;;) {
+		uint32_t start, size; 
+
+		switch (c) {
+    		case 'u': // upload 
+    			start = read_uint32();
+    			size  = read_uint32();
+    			for (p = (int8_t *) start; p < (int8_t *) (start+size); p++)
+    				*p = uart_getchar();
+    			break;
+		case 'd': // download
+    			start = read_uint32();
+    			size  = read_uint32();
+    			for (p = (int8_t *) start; p < (int8_t *) (start+size); p++)
+				uart_putchar( *p );
+    			break;
+    		case 'g': // goto
+    			start = read_uint32();
+    			jump(start);
+    			break;   
+		default:
+			uart_putstr("**SAKC/bootloader** > \r\n");
+			break;
+		};
+		c = uart_getchar();
+	}
+}
+

lm32/logic/sakc/firmware/cain_loader/soc-hw.c

@@ -3,6 +3,7 @@
 uart_t   *uart0  = (uart_t *)   0xF0000000;
 timer_t  *timer0 = (timer_t *)  0xF0010000;
 gpio_t   *gpio0  = (gpio_t *)   0xF0020000;
+// uint32_t *sram0  = (uint32_t *) 0x40000000;
 
 uint32_t msec = 0;
 
@@ -66,24 +67,3 @@ void uart_putstr(char *str)
 	}
 }
 
-void hexprint(unsigned int hexval)
-{
-  int digit[8], pos;
-  uart_putstr("0x");
-  for(pos = 0; pos < 8; pos++)
-    {
-      digit[pos] = (hexval & 0xF);  /* last hexit */
-      hexval = hexval >> 4;
-    }
-  for(pos = 7; pos > -1; pos--)
-    {
-      if(digit[pos] < 0xA)
-        uart_putstr((char *)digit[pos] + '0');
-      else
-        uart_putstr((char *)digit[pos] + 'A' - 10);
-    }
-  uart_putchar(' ');
-}
-
-
-

lm32/logic/sakc/firmware/cain_loader/soc-hw.h

@@ -105,7 +105,4 @@ extern uart_t   *uart0;
 extern gpio_t   *gpio0; 
 extern uint32_t *sram0; 
 
-int rxmodem(unsigned char *dest);
-void hexprint(unsigned int hexval);
-
 #endif // SPIKEHW_H

lm32/logic/sakc/firmware/cain_loader/xmodem.c

@@ -77,16 +77,10 @@ int rxmodem(unsigned char *dest)
 	unsigned short crc, tcrc;
 	int i, pid = 1, len = 0;
 
-	for (i = 0; i < 0x100000; i++)
-	{
-		*ptr = 0;
-		ptr++;
-	}
-
-
+        for(i = 0; i < 0x20000; i++) { asm("nop;"); }   
 	uart_putstr("Receiving Xmodem transfer\n");
 	uart_getchar ();
-        for(i = 0; i < 0x20000000; i++) { asm("nop;"); }   
+        for(i = 0; i < 0x20000; i++) { asm("nop;"); }   
 	uart_putchar ('C');
 
 	while(1)

lm32/logic/sakc/firmware/loader_cain/main.c

@@ -1,41 +0,0 @@
-#include "soc-hw.h"
-
-unsigned int i, j,k; // Loop counter.	
-
-
-int main() {
-  int key, len, autoboot = 1, dispmenu = 1;
-
-  uart_putstr("Cain's bootloader!!! \r\n");
-
-  while(1){ /* loop forever until u-boot gets booted or the board is reset */
-    if(dispmenu){
-     uart_putstr("\n1: Upload program to RAM\r\n");
-//      uart_putstr("2: Upload u-boot to Dataflash\r\n");
-//      uart_putstr("3: Upload Kernel to Dataflash\r\n");
-//      uart_putstr("4: Start u-boot\r\n");
-//      uart_putstr("5: Upload Filesystem image\r\n");
-//      uart_putstr("6: Memory test\r\n");
-      dispmenu = 0;
-    }
-      key = uart_getchar();
-      autoboot = 0;
-
-    if(key == '1'){
-      len = rxmodem((unsigned char *)0x1000);
-      uart_putstr("Received ");
-      hexprint(len);
-      uart_putstr(" bytes\r\n");
- //     jump(RAM_BASE);
-      dispmenu = 1;
-    }
-    else{
-      uart_putstr("Invalid input\r\n");
-      dispmenu = 1;
-    }
-  }
-
-  while(1){ asm("nop;"); } 
-
-  return (0);
-}

lm32/logic/sakc/system.v

@@ -6,7 +6,7 @@
 
 module system
 #(
-	parameter   bootram_file     = "../firmware/loader_cain/image.ram",
+	parameter   bootram_file     = "../firmware/cain_loader/image.ram",
 //	parameter   bootram_file     = "../firmware/boot0-serial/image.ram",
 	parameter   clk_freq         = 50000000,
 	parameter   uart_baud_rate   = 57600