initial commit of lk (little kernel) project
diff --git a/platform/at91sam7/debug.c b/platform/at91sam7/debug.c
new file mode 100644
index 0000000..2cca7b3
--- /dev/null
+++ b/platform/at91sam7/debug.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2008 Travis Geiselbrecht
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include <debug.h>
+#include <printf.h>
+#include <platform/at91sam7.h>
+#include <kernel/thread.h>
+#include <stdarg.h>
+
+void ser_init(void)
+{
+ AT91DBGU *dbgu = AT91DBGU_ADDR;
+
+// AT91PIO *pio = AT91PIO_ADDR;
+// pio->select_a = PIN_DRXD | PIN_DTXD;
+// pio->pio_disable = PIN_DRXD | PIN_DTXD;
+
+ dbgu->MR = DBGU_PAR_NONE | DBGU_MODE_NORMAL;
+ // dbgu->BRGR = 10; //MCK_IN_MHZ / 115200 / 16;
+ dbgu->BRGR = AT91_MCK_MHZ / 115200 / 16;
+ dbgu->CR = DBGU_RXEN | DBGU_TXEN;
+}
+
+void ser_putc(unsigned c)
+{
+ AT91DBGU *dbgu = AT91DBGU_ADDR;
+ if(c == 10) {
+ while(!(dbgu->SR & DBGU_TXRDY));
+ dbgu->THR = 13;
+ }
+ while(!(dbgu->SR & DBGU_TXRDY));
+ dbgu->THR = c;
+}
+
+void ser_puts(const char *s)
+{
+ AT91DBGU *dbgu = AT91DBGU_ADDR;
+ while(*s) {
+ if(*s == 10) {
+ while(!(dbgu->SR & DBGU_TXRDY));
+ dbgu->THR = 13;
+ }
+ while(!(dbgu->SR & DBGU_TXRDY));
+ dbgu->THR = *s++;
+ }
+}
+
+void dputc(char c)
+{
+ ser_putc(c);
+}
+
+void debug_halt()
+{
+ arch_disable_ints();
+ for(;;);
+}
+
+uint32_t debug_cycle_count()
+{
+ PANIC_UNIMPLEMENTED;
+}