[ADS5121] Support for the ADS5121 board

The following MPC5121e subsystems are supported:

- low-level CPU init
- NOR Boot Flash (common CFI driver)
- DDR SDRAM
- FEC
- I2C
- Watchdog

Signed-off-by: Grzegorz Bernacki <gjb@semihalf.com>
Signed-off-by: Rafal Jaworowski <raj@semihalf.com>
Signed-off-by: Jan Wrobel <wrr@semihalf.com>

1 files changed, 205 insertions, 0 deletions

diff --git a/cpu/mpc512x/traps.c b/cpu/mpc512x/traps.c
new file mode 100644
index 0000000..40281a2
--- /dev/null
+++ b/cpu/mpc512x/traps.c
@@ -0,0 +1,205 @@
+/*
+ * (C) Copyright 2000 - 2007
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Copyright (C) 1995-1996  Gary Thomas (gdt@linuxppc.org)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ * Derived from the MPC83xx code.
+ */
+
+/*
+ * This file handles the architecture-dependent parts of hardware
+ * exceptions
+ */
+
+#include <common.h>
+#include <asm/processor.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+extern unsigned long search_exception_table(unsigned long);
+
+#define END_OF_MEM	(gd->bd->bi_memstart + gd->bd->bi_memsize)
+
+/*
+ * Trap & Exception support
+ */
+
+void
+print_backtrace (unsigned long *sp)
+{
+	int cnt = 0;
+	unsigned long i;
+
+	puts ("Call backtrace: ");
+	while (sp) {
+		if ((uint)sp > END_OF_MEM)
+			break;
+
+		i = sp[1];
+		if (cnt++ % 7 == 0)
+			putc ('\n');
+		printf ("%08lX ", i);
+		if (cnt > 32) break;
+		sp = (unsigned long *) *sp;
+	}
+	putc ('\n');
+}
+
+void show_regs (struct pt_regs * regs)
+{
+	int i;
+
+	printf ("NIP: %08lX XER: %08lX LR: %08lX REGS: %p TRAP: %04lx DAR: %08lX\n",
+	       regs->nip, regs->xer, regs->link, regs, regs->trap, regs->dar);
+	printf ("MSR: %08lx EE: %01x PR: %01x FP: %01x ME: %01x IR/DR: %01x%01x\n",
+	       regs->msr, regs->msr & MSR_EE ? 1 : 0, regs->msr & MSR_PR ? 1 : 0,
+	       regs->msr & MSR_FP ? 1 : 0,regs->msr & MSR_ME ? 1 : 0,
+	       regs->msr & MSR_IR ? 1 : 0,
+	       regs->msr & MSR_DR ? 1 : 0);
+
+	putc ('\n');
+	for (i = 0;  i < 32;  i++) {
+		if ((i % 8) == 0) {
+			printf ("GPR%02d: ", i);
+		}
+
+		printf ("%08lX ", regs->gpr[i]);
+		if ((i % 8) == 7) {
+			putc ('\n');
+		}
+	}
+}
+
+
+void
+_exception (int signr, struct pt_regs *regs)
+{
+	show_regs (regs);
+	print_backtrace ((unsigned long *)regs->gpr[1]);
+	panic ("Exception at pc %lx signal %d", regs->nip,signr);
+}
+
+
+void
+MachineCheckException (struct pt_regs *regs)
+{
+	unsigned long fixup;
+
+	if ((fixup = search_exception_table (regs->nip)) != 0) {
+		regs->nip = fixup;
+		return;
+	}
+
+#if (CONFIG_COMMANDS & CFG_CMD_KGDB)
+	if (debugger_exception_handler && (*debugger_exception_handler)(regs))
+		return;
+#endif
+
+	puts ("Machine check.\nCaused by (from msr): ");
+	printf ("regs %p ",regs);
+	switch (regs->msr & 0x00FF0000) {
+	case (0x80000000 >> 10):
+		puts ("Instruction cache parity signal\n");
+		break;
+	case (0x80000000 >> 11):
+		puts ("Data cache parity signal\n");
+		break;
+	case (0x80000000 >> 12):
+		puts ("Machine check signal\n");
+		break;
+	case (0x80000000 >> 13):
+		puts ("Transfer error ack signal\n");
+		break;
+	case (0x80000000 >> 14):
+		puts ("Data parity signal\n");
+		break;
+	case (0x80000000 >> 15):
+		puts ("Address parity signal\n");
+		break;
+	default:
+		puts ("Unknown values in msr\n");
+	}
+	show_regs (regs);
+	print_backtrace ((unsigned long *)regs->gpr[1]);
+
+	panic ("machine check");
+}
+
+void
+AlignmentException (struct pt_regs *regs)
+{
+#if (CONFIG_COMMANDS & CFG_CMD_KGDB)
+	if (debugger_exception_handler && (*debugger_exception_handler)(regs))
+		return;
+#endif
+	show_regs (regs);
+	print_backtrace ((unsigned long *)regs->gpr[1]);
+	panic ("Alignment Exception");
+}
+
+void
+ProgramCheckException (struct pt_regs *regs)
+{
+#if (CONFIG_COMMANDS & CFG_CMD_KGDB)
+	if (debugger_exception_handler && (*debugger_exception_handler)(regs))
+		return;
+#endif
+	show_regs (regs);
+	print_backtrace ((unsigned long *)regs->gpr[1]);
+	panic ("Program Check Exception");
+}
+
+void
+SoftEmuException (struct pt_regs *regs)
+{
+#if (CONFIG_COMMANDS & CFG_CMD_KGDB)
+	if (debugger_exception_handler && (*debugger_exception_handler)(regs))
+		return;
+#endif
+	show_regs (regs);
+	print_backtrace ((unsigned long *)regs->gpr[1]);
+	panic ("Software Emulation Exception");
+}
+
+
+void
+UnknownException (struct pt_regs *regs)
+{
+#if (CONFIG_COMMANDS & CFG_CMD_KGDB)
+	if (debugger_exception_handler && (*debugger_exception_handler)(regs))
+		return;
+#endif
+	printf ("Bad trap at PC: %lx, SR: %lx, vector=%lx\n",
+	       regs->nip, regs->msr, regs->trap);
+	_exception (0, regs);
+}
+
+#if (CONFIG_COMMANDS & CFG_CMD_BEDBUG)
+extern void do_bedbug_breakpoint (struct pt_regs *);
+#endif
+
+void
+DebugException (struct pt_regs *regs)
+{
+	printf ("Debugger trap at @ %lx\n", regs->nip );
+	show_regs (regs);
+#if (CONFIG_COMMANDS & CFG_CMD_BEDBUG)
+	do_bedbug_breakpoint (regs);
+#endif
+}