split kernel into 2 stages; second stage gets copied to 0x0 and runs from there

1 files changed, 41 insertions, 0 deletions

diff --git a/setup.c b/setup.c
new file mode 100644
index 0000000..48df825
--- /dev/null
+++ b/setup.c
@@ -0,0 +1,41 @@
+#include "uart.h"
+#include "demo_functionality.h"
+#include "paging.h"
+
+void setup(void)
+{
+  uart_init();
+
+  // When we attach screen session after loading kernel with socat
+  // we miss kernel's greeting... So we'll make the kernel wait for
+  // one char we're going to send from within screen
+  uart_getc();
+  
+  uart_puts("Hello, kernel World!\r\n");
+
+  // prints some info
+  demo_paging_support();
+
+  // prints some info
+  demo_current_mode();
+
+  // prints some info and sets upp translation table, turns on MMU
+  setup_flat_map();
+
+  // prints some info and sets up a section for PL0 code,
+  // loads a blob there 
+  demo_setup_PL0();
+
+  // jumps to unprivileged code... never, ever, ever returns
+  demo_go_unprivileged();
+  
+  while (1)
+    {
+      char c = uart_getc();
+
+      uart_putc(c);
+      
+      if (c == '\r')
+	uart_putc('\n');
+    }
+}