GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/arch/m68k/lib/traps.c

@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2003
+ * Josef Baumgartner <josef.baumgartner@telex.de>
+ *
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ */
+
+#include <common.h>
+#include <init.h>
+#include <watchdog.h>
+#include <command.h>
+#include <asm/processor.h>
+
+
+extern void _exc_handler(void);
+extern void _int_handler(void);
+
+static void show_frame(struct pt_regs *fp)
+{
+	printf ("Vector Number: %d  Format: %02x  Fault Status: %01x\n\n", (fp->vector & 0x3fc) >> 2,
+		fp->format, (fp->vector & 0x3) | ((fp->vector & 0xc00) >> 8));
+	printf ("PC: %08lx    SR: %08lx    SP: %08lx\n", fp->pc, (long) fp->sr, (long) fp);
+	printf ("D0: %08lx    D1: %08lx    D2: %08lx    D3: %08lx\n",
+		fp->d0, fp->d1, fp->d2, fp->d3);
+	printf ("D4: %08lx    D5: %08lx    D6: %08lx    D7: %08lx\n",
+		fp->d4, fp->d5, fp->d6, fp->d7);
+	printf ("A0: %08lx    A1: %08lx    A2: %08lx    A3: %08lx\n",
+		fp->a0, fp->a1, fp->a2, fp->a3);
+	printf ("A4: %08lx    A5: %08lx    A6: %08lx\n",
+		fp->a4, fp->a5, fp->a6);
+}
+
+void exc_handler(struct pt_regs *fp) {
+	printf("\n\n*** Unexpected exception ***\n");
+	show_frame (fp);
+	printf("\n*** Please Reset Board! ***\n");
+	for(;;);
+}
+
+void trap_init(ulong value) {
+	unsigned long *vec = (ulong *)value;
+	int i;
+
+	for(i = 2; i < 25; i++) {
+		vec[i] = (unsigned long)_exc_handler;
+	}
+	for(i = 25; i < 32; i++) {
+		vec[i] = (unsigned long)_int_handler;
+	}
+	for(i = 32; i < 64; i++) {
+		vec[i] = (unsigned long)_exc_handler;
+	}
+	for(i = 64; i < 256; i++) {
+		vec[i] = (unsigned long)_int_handler;
+	}
+
+	setvbr(value);		/* set vector base register to new table */
+}