Large reorganization.

What was in core/ is now moved to arch/stm34l4xxx/peripherals.  This new
directory is *supposed to* to contain raw header files defining just the
pertinent register structures for the various peripherals.  Peripheral
management belongs somewhere in the new `kern/..` directories. This is
not completely the case at the moment, so more refactoring needs to be
done.

What was sitting in the root has now been moved into the kern/
directory. The kern/ directory is to contain everything else
other than raw device register definitions. The root of the kern/
tree is reserved for standard library-esque headers.

The kern/<peripheral> directory contains management systems for that
peripheral. (At the moment DMA is the only peripheral with a decent
management system.) Preferably these peripheral systems should only
include their correlating header in arch/stm34l4xxx/peripherals, and
use other management systems for handling other peripherals rather
than manipulating their raw registers directly. (Though this ideal
will require much more critical mass of management systems.)

1 files changed, 46 insertions, 0 deletions

diff --git a/02-usart/include/arch/stm32l4xxx/peripherals/nvic.h b/02-usart/include/arch/stm32l4xxx/peripherals/nvic.h
new file mode 100644
index 0000000..1645a2d
--- /dev/null
+++ b/02-usart/include/arch/stm32l4xxx/peripherals/nvic.h
@@ -0,0 +1,46 @@
+#ifndef NVIC_H_
+#define NVIC_H_
+
+#include "arch.h"
+#include "kern/common.h"
+
+typedef __IO struct {
+#define nvic_intlinesnum (0x0F << 0)
+  uint32_t ict_r; /* Interrupt control type register. */
+
+  uint8_t reserved0[0xF8];
+
+  uint32_t ise_r[8];
+
+  uint8_t reserved1[0x60];
+
+  uint32_t ice_r[8];
+
+  uint8_t reserved2[0x60];
+
+  uint32_t isp_r[8];
+
+  uint8_t reserved3[0x60];
+
+  uint32_t icp_r[8];
+
+  uint8_t reserved4[0x60];
+
+  uint32_t iab_r[8];
+  
+  uint8_t reserved5[0xE0];
+
+  uint32_t ip_r[60];
+} nvic_t;
+
+static_assert(offsetof(nvic_t, ise_r) == 0x00FC, "Offset check failed");
+static_assert(offsetof(nvic_t, ice_r) == 0x017C, "Offset check failed");
+static_assert(offsetof(nvic_t, isp_r) == 0x01FC, "Offset check failed");
+static_assert(offsetof(nvic_t, icp_r) == 0x027C, "Offset check failed");
+static_assert(offsetof(nvic_t, iab_r) == 0x02FC, "Offset check failed");
+static_assert(offsetof(nvic_t,  ip_r) == 0x03FC, "Offset check failed");
+
+#define NVIC (* (nvic_t*) NVIC_BASE)
+
+
+#endif /* NVIC_H_ */