From 7b1008111baa95b4a8c3195f9f5a94bfdbe8d7d2 Mon Sep 17 00:00:00 2001
From: Josh Rahm <joshuarahm@gmail.com>
Date: Sat, 16 Nov 2024 14:37:24 -0700
Subject: Move exc and nmi handlers to their own files.

---
 include/exc.c   | 43 +++++++++++++++++++++++++++++++++++++++++++
 include/panic.h |  9 +++++++++
 src/main.c      | 29 -----------------------------
 3 files changed, 52 insertions(+), 29 deletions(-)
 create mode 100644 include/exc.c
 create mode 100644 include/panic.h

diff --git a/include/exc.c b/include/exc.c
new file mode 100644
index 0000000..707d3b0
--- /dev/null
+++ b/include/exc.c
@@ -0,0 +1,43 @@
+#include <stdio.h>
+
+#include "isr_vector.h"
+#include "panic.h"
+
+#include "ch573/gpio.h"
+
+#define GPIO_PORT_A ch573_gpio__gpio_port_a
+#define GPIO_PORT CH573_GPIO__GPIO_PORT_T_INTF
+
+void delay();
+
+IRQ(exc)
+{
+  uint32_t mcause, mepc, mtval, *sp;
+
+  asm volatile("csrr %0, mcause" : "=r"(mcause));
+  asm volatile("csrr %0, mepc" : "=r"(mepc));
+  asm volatile("csrr %0, mtval" : "=r"(mtval));
+
+  printf("Hardware Exception Caught:\n");
+  printf("  mcause: 0x%80x\n", mcause);
+  printf("    mepc: 0x%80x\n", mepc);
+  printf("   mtval: 0x%80x\n", mtval);
+
+  panic(mcause);
+}
+
+IRQ(nmi)
+{
+  uint32_t mcause, mepc, mtval, *sp;
+
+  asm volatile("csrr %0, mcause" : "=r"(mcause));
+  asm volatile("csrr %0, mepc" : "=r"(mepc));
+  asm volatile("csrr %0, mtval" : "=r"(mtval));
+
+  printf("Unhandled NMI Caught:\n");
+  printf("  mcause: 0x%80x\n", mcause);
+  printf("    mepc: 0x%80x\n", mepc);
+  printf("   mtval: 0x%80x\n", mtval);
+
+  panic(mcause);
+}
diff --git a/include/panic.h b/include/panic.h
new file mode 100644
index 0000000..e52bfc8
--- /dev/null
+++ b/include/panic.h
@@ -0,0 +1,9 @@
+#pragma once
+
+#include <stdint.h>
+
+/** flashes a code forever. */
+void flash_code(uint32_t code);
+
+/** Panics. Call this function when an error is unrrecoverable. */
+void panic(uint32_t code);
diff --git a/src/main.c b/src/main.c
index c2796a9..ed82a3a 100644
--- a/src/main.c
+++ b/src/main.c
@@ -185,32 +185,3 @@ void print_hex(uint32_t x)
     ++i;
   }
 }
-
-
-IRQ(exc)
-{
-  uint32_t mcause, mepc, mtval, *sp;
-
-  asm volatile("csrr %0, mcause" : "=r"(mcause));
-  asm volatile("csrr %0, mepc" : "=r"(mepc));
-  asm volatile("csrr %0, mtval" : "=r"(mtval));
-
-  printf("Hardware Exception Caught:\n");
-  printf("  mcause: 0x%80x\n", mcause);
-  printf("    mepc: 0x%80x\n", mepc);
-  printf("   mtval: 0x%80x\n", mtval);
-
-  panic(mcause);
-
-  while (1);
-}
-
-IRQ(nmi)
-{
-  while (1) {
-    GPIO_PORT.out.set(GPIO_PORT_A, ON, 8);
-    delay();
-    GPIO_PORT.out.set(GPIO_PORT_A, OFF, 8);
-    delay();
-  }
-}
-- 
cgit