- fixed bootloader

- bootloader added board file - refactored header files - constify constants git-svn-id: http://moon:8086/svn/mips@99 a8ebac50-d88d-4704-bea3-6648445a41b3
2017-01-18 22:28:07 +00:00
parent 702cb814a1
commit cf233c4d81
21 changed files with 289 additions and 172 deletions
@@ -0,0 +1,89 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+#include <stddef.h>
+#include "../../../libsys/boards/denano/board.h"
+#include "../../../libsys/uart.h"
+#include "../../../libsys/irq.h"
+
+#define DEBUGGER	gdb_stub
+
+extern uart_if_t uart_if[];
+
+#define ARRAYSIZE(a)	(sizeof(a)/sizeof(a[0]))
+
+static uart_if_t const *dbg_uart = NULL;
+static volatile uint32_t *pGpioData = (uint32_t*)SYS_GPIO_0_DATA;
+static volatile uint32_t *pGpioDir = (uint32_t*)SYS_GPIO_0_DIR;
+static uint32_t led_count = 0;
+
+extern int dbg_handler(struct xcptcontext * xcp);
+extern void handle_exception (unsigned long *registers);
+
+int gdb_stub(struct xcptcontext * xcp)
+{
+//	handle_exception((unsigned long *)xcp);
+	return 0;
+}
+
+void dbg_uart_isr(struct xcptcontext *xcp)
+{
+	if(SYS_UART_BIT_RX_AVAIL & *dbg_uart->pCTRL)
+	{
+		char c = *dbg_uart->pDATA;
+		if (c == 3)
+		{
+			DEBUGGER(xcp);
+		}
+	}
+}
+
+void dbg_uart_setup()
+{
+	const int UART_INT = SYS_INT_UART1;
+	dbg_uart = (uart_if_t*)&uart_if[1];
+	
+	*dbg_uart->pCTRL = SYS_UART_BIT_RX_INTEN;
+}
+
+inline void _dbg_writechar(uart_if_t const *pUart, char c)
+{
+	while((SYS_UART_BIT_TX_HALFFULL & *pUart->pCTRL) != 0);
+
+	*pUart->pDATA = (uint32_t)c;
+	
+}
+
+inline char _dbg_readchar(uart_if_t const *pUart)
+{
+	// busy read
+	while(!(SYS_UART_BIT_RX_AVAIL & *pUart->pCTRL))
+	{
+		(*pGpioData) = (led_count++) >> 16;
+	}
+	led_count = 0;
+	return (*pUart->pDATA & 0xFF);
+
+}
+
+void dbg_putchar(char c)
+{
+	if (c == 0x0A)
+	{
+		_dbg_writechar(dbg_uart, 0x0D);
+	}
+	_dbg_writechar(dbg_uart, c);
+}
+
+char dbg_getchar()
+{
+	return (char)_dbg_readchar(dbg_uart);
+}
+
+void board_init(void)
+{
+
+}