kernel/aarch64: Add exception code + frame fixups

- Add handle_exception() as higher level logic to handle the exceptions
- Simplify frame.h
- Call C handler in vector.S
- Clean up stack after creating frame
- Add register dump on exception

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 36 insertions, 44 deletions

diff --git a/sys/include/arch/aarch64/frame.h b/sys/include/arch/aarch64/frame.h
index f14fa01..143f4d0 100644
--- a/sys/include/arch/aarch64/frame.h
+++ b/sys/include/arch/aarch64/frame.h
@@ -31,46 +31,11 @@
 #define _MACHINE_FRAME_H_
 
 #include <sys/types.h>
+#include <sys/cdefs.h>
 
 typedef uint64_t lreg_t;
 typedef uint64_t frament_t;
 
-/* General purpose registers */
-struct gpregs {
-    frament_t trapno;
-    lreg_t x0;
-    lreg_t x1;
-    lreg_t x2;
-    lreg_t x3;
-    lreg_t x4;
-    lreg_t x5;
-    lreg_t x6;
-    lreg_t x7;
-    lreg_t x8;
-    lreg_t x9;
-    lreg_t x10;
-    lreg_t x11;
-    lreg_t x12;
-    lreg_t x13;
-    lreg_t x14;
-    lreg_t x15;
-    lreg_t x16;
-    lreg_t x17;
-    lreg_t x18;
-    lreg_t x19;
-    lreg_t x20;
-    lreg_t x21;
-    lreg_t x22;
-    lreg_t x23;
-    lreg_t x24;
-    lreg_t x25;
-    lreg_t x26;
-    lreg_t x27;
-    lreg_t x28;
-    lreg_t x29;
-    lreg_t x30;
-};
-
 /* Stack regs */
 struct sregs {
     lreg_t sp_el0;
@@ -85,14 +50,41 @@ struct pstat {
     lreg_t spsr_el3;
 };
 
-struct trapframe {
-    struct gpregs gp;
-    struct sregs stack;
-    struct pstat status;
-    lreg_t elr_el1;
-    lreg_t elr_el2;
-    lreg_t elr_el3;
-    lreg_t pc;
+struct __aligned(16) trapframe {
+    lreg_t x30;
+    lreg_t x29;
+    lreg_t x28;
+    lreg_t x27;
+    lreg_t x26;
+    lreg_t x25;
+    lreg_t x24;
+    lreg_t x23;
+    lreg_t x22;
+    lreg_t x21;
+    lreg_t x20;
+    lreg_t x19;
+    lreg_t x18;
+    lreg_t x17;
+    lreg_t x16;
+    lreg_t x15;
+    lreg_t x14;
+    lreg_t x13;
+    lreg_t x12;
+    lreg_t x11;
+    lreg_t x10;
+    lreg_t x9;
+    lreg_t x8;
+    lreg_t x7;
+    lreg_t x6;
+    lreg_t x5;
+    lreg_t x4;
+    lreg_t x3;
+    lreg_t x2;
+    lreg_t x1;
+    lreg_t x0;
+    lreg_t elr;
+    lreg_t esr;
+    frament_t trapno;
 };
 
 #define TF_IP(TFP) ((TFP)->pc)