add blackfin cache and traps handling

1 files changed, 110 insertions, 0 deletions

diff --git a/arch/blackfin/lib/traps.c b/arch/blackfin/lib/traps.c
new file mode 100644
index 0000000000..fcda7861a3
--- /dev/null
+++ b/arch/blackfin/lib/traps.c
@@ -0,0 +1,110 @@
+/*
+ * U-boot - traps.c Routines related to interrupts and exceptions
+ *
+ * Copyright (c) 2005 blackfin.uclinux.org
+ *
+ * This file is based on
+ * No original Copyright holder listed,
+ * Probabily original (C) Roman Zippel (assigned DJD, 1999)
+ *
+ * Copyright 2003 Metrowerks - for Blackfin
+ * Copyright 2000-2001 Lineo, Inc. D. Jeff Dionne <jeff@lineo.ca>
+ * Copyright 1999-2000 D. Jeff Dionne, <jeff@uclinux.org>
+ *
+ * (C) Copyright 2000-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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
+ */
+
+#include <common.h>
+#include <linux/types.h>
+#include <asm/system.h>
+#include <asm/traps.h>
+#include <asm/page.h>
+#include <asm/cplb.h>
+#include <asm/ptrace.h>
+#include <asm/cpu.h>
+
+void dump_regs(struct pt_regs *fp)
+{
+	printf("DCPLB_FAULT_ADDR=%p\n", *pDCPLB_FAULT_ADDR);
+	printf("ICPLB_FAULT_ADDR=%p\n", *pICPLB_FAULT_ADDR);
+
+	printf("stack frame=0x%x, ", (unsigned int) fp);
+	printf("bad PC=0x%04x\n", (unsigned int) fp->pc);
+        printf("RETE:  %08lx  RETN: %08lx  RETX: %08lx  RETS: %08lx\n", fp->rete, fp->retn, fp->retx, fp->rets);
+        printf("IPEND: %04lx  SYSCFG: %04lx\n", fp->ipend, fp->syscfg);
+        printf("SEQSTAT: %08lx    SP: %08lx\n", (long)fp->seqstat, (long)fp);
+        printf("R0: %08lx    R1: %08lx    R2: %08lx    R3: %08lx\n", fp->r0, fp->r1, fp->r2, fp->r3);
+        printf("R4: %08lx    R5: %08lx    R6: %08lx    R7: %08lx\n", fp->r4, fp->r5, fp->r6, fp->r7);
+        printf("P0: %08lx    P1: %08lx    P2: %08lx    P3: %08lx\n", fp->p0, fp->p1, fp->p2, fp->p3);
+        printf("P4: %08lx    P5: %08lx    FP: %08lx\n", fp->p4, fp->p5, fp->fp);
+        printf("A0.w: %08lx    A0.x: %08lx    A1.w: %08lx    A1.x: %08lx\n", fp->a0w, fp->a0x, fp->a1w, fp->a1x);
+
+        printf("LB0: %08lx  LT0: %08lx  LC0: %08lx\n", fp->lb0, fp->lt0, fp->lc0);
+        printf("LB1: %08lx  LT1: %08lx  LC1: %08lx\n", fp->lb1, fp->lt1, fp->lc1);
+        printf("B0: %08lx  L0: %08lx  M0: %08lx  I0: %08lx\n", fp->b0, fp->l0, fp->m0, fp->i0);
+        printf("B1: %08lx  L1: %08lx  M1: %08lx  I1: %08lx\n", fp->b1, fp->l1, fp->m1, fp->i1);
+        printf("B2: %08lx  L2: %08lx  M2: %08lx  I2: %08lx\n", fp->b2, fp->l2, fp->m2, fp->i2);
+        printf("B3: %08lx  L3: %08lx  M3: %08lx  I3: %08lx\n", fp->b3, fp->l3, fp->m3, fp->i3);
+}
+
+static const char *trap_to_string(int trapnr)
+{
+	switch (trapnr) {
+	case VEC_MISALI_D:
+		return "Data access misaligned";
+	case VEC_MISALI_I:
+		return "Instruction fetch misaligned";
+	case VEC_CPLB_I_M:
+		return "Instruction fetch CPLB miss";
+	}
+	return NULL;
+}
+
+void trap_c (struct pt_regs *regs)
+{
+	unsigned long trapnr = (regs->seqstat) & SEQSTAT_EXCAUSE;
+	const char *str;
+
+	printf("Exception occured!\n\n");
+
+	str = trap_to_string(trapnr);
+	if (str)
+		printf("%s\n", str);
+	printf("code=[0x%x]\n", trapnr);
+
+	dump_regs(regs);
+
+	printf("\nPlease reset the board\n");
+
+	reset_cpu(0);
+}
+
+void blackfin_irq_panic(int reason, struct pt_regs *regs)
+{
+	printf("\n\nException: IRQ 0x%x entered\n", reason);
+	dump_regs(regs);
+	printf("Unhandled IRQ or exceptions!\n");
+	printf("Please reset the board \n");
+
+	reset_cpu(0);
+}
+