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Diffstat (limited to 'util/romcc/tests/simple_test27.c')
-rw-r--r--util/romcc/tests/simple_test27.c133
1 files changed, 133 insertions, 0 deletions
diff --git a/util/romcc/tests/simple_test27.c b/util/romcc/tests/simple_test27.c
new file mode 100644
index 0000000000..d40e43f1c4
--- /dev/null
+++ b/util/romcc/tests/simple_test27.c
@@ -0,0 +1,133 @@
+void outb(unsigned char value, unsigned short port)
+{
+ __builtin_outb(value, port);
+}
+
+unsigned char inb(unsigned short port)
+{
+ return __builtin_inb(port);
+}
+
+/* Base Address */
+#ifndef TTYS0_BASE
+#define TTYS0_BASE 0x3f8
+#endif
+
+#ifndef TTYS0_BAUD
+#define TTYS0_BAUD 115200
+#endif
+
+#if ((115200%TTYS0_BAUD) != 0)
+#error Bad ttys0 baud rate
+#endif
+
+#if TTYS0_BAUD == 115200
+#define TTYS0_DIV (1)
+#else
+#define TTYS0_DIV (115200/TTYS0_BAUD)
+#endif
+
+/* Line Control Settings */
+#ifndef TTYS0_LCS
+/* Set 8bit, 1 stop bit, no parity */
+#define TTYS0_LCS 0x3
+#endif
+
+#define UART_LCS TTYS0_LCS
+
+/* Data */
+#define UART_RBR 0x00
+#define UART_TBR 0x00
+
+/* Control */
+#define UART_IER 0x01
+#define UART_IIR 0x02
+#define UART_FCR 0x02
+#define UART_LCR 0x03
+#define UART_MCR 0x04
+#define UART_DLL 0x00
+#define UART_DLM 0x01
+
+/* Status */
+#define UART_LSR 0x05
+#define UART_MSR 0x06
+#define UART_SCR 0x07
+
+int uart_can_tx_byte(void)
+{
+ return inb(TTYS0_BASE + UART_LSR) & 0x20;
+}
+
+void uart_wait_to_tx_byte(void)
+{
+ while(!uart_can_tx_byte())
+ ;
+}
+
+void uart_wait_until_sent(void)
+{
+ while(!(inb(TTYS0_BASE + UART_LSR) & 0x40))
+ ;
+}
+
+static void uart_tx_byte(unsigned char data)
+{
+ uart_wait_to_tx_byte();
+ outb(data, TTYS0_BASE + UART_TBR);
+ /* Make certain the data clears the fifos */
+ uart_wait_until_sent();
+}
+
+
+void uart_init(void)
+{
+ /* disable interrupts */
+ outb(0x0, TTYS0_BASE + UART_IER);
+ /* enable fifo's */
+ outb(0x01, TTYS0_BASE + UART_FCR);
+ /* Set Baud Rate Divisor to 12 ==> 115200 Baud */
+ outb(0x80 | UART_LCS, TTYS0_BASE + UART_LCR);
+ outb(TTYS0_DIV & 0xFF, TTYS0_BASE + UART_DLL);
+ outb((TTYS0_DIV >> 8) & 0xFF, TTYS0_BASE + UART_DLM);
+ outb(UART_LCS, TTYS0_BASE + UART_LCR);
+}
+
+
+void __console_tx_char(unsigned char byte)
+{
+ uart_tx_byte(byte);
+
+}
+
+void __console_tx_string(char *str)
+{
+ unsigned char ch;
+ while((ch = *str++) != '\0') {
+ __console_tx_char(ch);
+ }
+}
+
+
+void print_debug_char(unsigned char byte) { __console_tx_char(byte); }
+void print_debug(char *str) { __console_tx_string(str); }
+
+void main(void)
+{
+ static const char msg[] = "hello world\r\n";
+ uart_init();
+#if 0
+ print_debug(msg);
+#endif
+#if 1
+ print_debug("hello world\r\n");
+ print_debug("how are you today\r\n");
+#endif
+ while(1) {
+ ;
+ }
+}
+
+void main2(void)
+{
+ main();
+}