[Blackfin][PATCH] Add BF537 stamp board support

1 files changed, 241 insertions, 0 deletions

diff --git a/cpu/bf537/traps.c b/cpu/bf537/traps.c
new file mode 100644
index 0000000..994ece8
--- /dev/null
+++ b/cpu/bf537/traps.c
@@ -0,0 +1,241 @@
+/*
+ * 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/errno.h>
+#include <asm/irq.h>
+#include <asm/system.h>
+#include <asm/traps.h>
+#include <asm/page.h>
+#include <asm/machdep.h>
+#include "cpu.h"
+#include <asm/arch/anomaly.h>
+#include <asm/cplb.h>
+#include <asm/io.h>
+
+void init_IRQ(void)
+{
+	blackfin_init_IRQ();
+	return;
+}
+
+void process_int(unsigned long vec, struct pt_regs *fp)
+{
+	printf("interrupt\n");
+	return;
+}
+
+extern unsigned int icplb_table[page_descriptor_table_size][2];
+extern unsigned int dcplb_table[page_descriptor_table_size][2];
+
+unsigned long last_cplb_fault_retx;
+
+static unsigned int cplb_sizes[4] =
+    { 1024, 4 * 1024, 1024 * 1024, 4 * 1024 * 1024 };
+
+void trap_c(struct pt_regs *regs)
+{
+	unsigned int addr;
+	unsigned long trapnr = (regs->seqstat) & SEQSTAT_EXCAUSE;
+	unsigned int i, j, size, *I0, *I1;
+	unsigned short data = 0;
+
+	switch (trapnr) {
+		/* 0x26 - Data CPLB Miss */
+	case VEC_CPLB_M:
+
+#ifdef ANOMALY_05000261
+		/*
+		 * Work around an anomaly: if we see a new DCPLB fault,
+		 * return without doing anything. Then,
+		 * if we get the same fault again, handle it.
+		 */
+		addr = last_cplb_fault_retx;
+		last_cplb_fault_retx = regs->retx;
+		printf("this time, curr = 0x%08x last = 0x%08x\n",
+		       addr, last_cplb_fault_retx);
+		if (addr != last_cplb_fault_retx)
+			goto trap_c_return;
+#endif
+		data = 1;
+
+	case VEC_CPLB_I_M:
+
+		if (data) {
+			addr = *pDCPLB_FAULT_ADDR;
+		} else {
+			addr = *pICPLB_FAULT_ADDR;
+		}
+		for (i = 0; i < page_descriptor_table_size; i++) {
+			if (data) {
+				size = cplb_sizes[dcplb_table[i][1] >> 16];
+				j = dcplb_table[i][0];
+			} else {
+				size = cplb_sizes[icplb_table[i][1] >> 16];
+				j = icplb_table[i][0];
+			}
+			if ((j <= addr) && ((j + size) > addr)) {
+				debug("found %i 0x%08x\n", i, j);
+				break;
+			}
+		}
+		if (i == page_descriptor_table_size) {
+			printf("something is really wrong\n");
+			do_reset(NULL, 0, 0, NULL);
+		}
+
+		/* Turn the cache off */
+		if (data) {
+			sync();
+			asm(" .align 8; ");
+			*(unsigned int *)DMEM_CONTROL &=
+			    ~(ACACHE_BCACHE | ENDCPLB | PORT_PREF0);
+			sync();
+		} else {
+			sync();
+			asm(" .align 8; ");
+			*(unsigned int *)IMEM_CONTROL &= ~(IMC | ENICPLB);
+			sync();
+		}
+
+		if (data) {
+			I0 = (unsigned int *)DCPLB_ADDR0;
+			I1 = (unsigned int *)DCPLB_DATA0;
+		} else {
+			I0 = (unsigned int *)ICPLB_ADDR0;
+			I1 = (unsigned int *)ICPLB_DATA0;
+		}
+
+		j = 0;
+		while (*I1 & CPLB_LOCK) {
+			debug("skipping %i %08p - %08x\n", j, I1, *I1);
+			*I0++;
+			*I1++;
+			j++;
+		}
+
+		debug("remove %i 0x%08x  0x%08x\n", j, *I0, *I1);
+
+		for (; j < 15; j++) {
+			debug("replace %i 0x%08x  0x%08x\n", j, I0, I0 + 1);
+			*I0++ = *(I0 + 1);
+			*I1++ = *(I1 + 1);
+		}
+
+		if (data) {
+			*I0 = dcplb_table[i][0];
+			*I1 = dcplb_table[i][1];
+			I0 = (unsigned int *)DCPLB_ADDR0;
+			I1 = (unsigned int *)DCPLB_DATA0;
+		} else {
+			*I0 = icplb_table[i][0];
+			*I1 = icplb_table[i][1];
+			I0 = (unsigned int *)ICPLB_ADDR0;
+			I1 = (unsigned int *)ICPLB_DATA0;
+		}
+
+		for (j = 0; j < 16; j++) {
+			debug("%i 0x%08x  0x%08x\n", j, *I0++, *I1++);
+		}
+
+		/* Turn the cache back on */
+		if (data) {
+			j = *(unsigned int *)DMEM_CONTROL;
+			sync();
+			asm(" .align 8; ");
+			*(unsigned int *)DMEM_CONTROL =
+			    ACACHE_BCACHE | ENDCPLB | PORT_PREF0 | j;
+			sync();
+		} else {
+			sync();
+			asm(" .align 8; ");
+			*(unsigned int *)IMEM_CONTROL = IMC | ENICPLB;
+			sync();
+		}
+
+		break;
+	default:
+		/* All traps come here */
+		printf("code=[0x%x], ", (unsigned int)(regs->seqstat & 0x3f));
+		printf("stack frame=0x%x, ", (unsigned int)regs);
+		printf("bad PC=0x%04x\n", (unsigned int)regs->pc);
+		dump(regs);
+		printf("\n\n");
+
+		printf("Unhandled IRQ or exceptions!\n");
+		printf("Please reset the board \n");
+		do_reset(NULL, 0, 0, NULL);
+	}
+
+trap_c_return:
+	return;
+
+}
+
+void dump(struct pt_regs *fp)
+{
+	debug("RETE:  %08lx  RETN: %08lx  RETX: %08lx  RETS: %08lx\n",
+		 fp->rete, fp->retn, fp->retx, fp->rets);
+	debug("IPEND: %04lx  SYSCFG: %04lx\n", fp->ipend, fp->syscfg);
+	debug("SEQSTAT: %08lx    SP: %08lx\n", (long)fp->seqstat, (long)fp);
+	debug("R0: %08lx    R1: %08lx    R2: %08lx    R3: %08lx\n",
+		 fp->r0, fp->r1, fp->r2, fp->r3);
+	debug("R4: %08lx    R5: %08lx    R6: %08lx    R7: %08lx\n",
+		 fp->r4, fp->r5, fp->r6, fp->r7);
+	debug("P0: %08lx    P1: %08lx    P2: %08lx    P3: %08lx\n",
+		 fp->p0, fp->p1, fp->p2, fp->p3);
+	debug("P4: %08lx    P5: %08lx    FP: %08lx\n",
+		 fp->p4, fp->p5, fp->fp);
+	debug("A0.w: %08lx    A0.x: %08lx    A1.w: %08lx    A1.x: %08lx\n",
+		 fp->a0w, fp->a0x, fp->a1w, fp->a1x);
+
+	debug("LB0: %08lx  LT0: %08lx  LC0: %08lx\n",
+		 fp->lb0, fp->lt0, fp->lc0);
+	debug("LB1: %08lx  LT1: %08lx  LC1: %08lx\n",
+		 fp->lb1, fp->lt1, fp->lc1);
+	debug("B0: %08lx  L0: %08lx  M0: %08lx  I0: %08lx\n",
+		 fp->b0, fp->l0, fp->m0, fp->i0);
+	debug("B1: %08lx  L1: %08lx  M1: %08lx  I1: %08lx\n",
+		 fp->b1, fp->l1, fp->m1, fp->i1);
+	debug("B2: %08lx  L2: %08lx  M2: %08lx  I2: %08lx\n",
+		 fp->b2, fp->l2, fp->m2, fp->i2);
+	debug("B3: %08lx  L3: %08lx  M3: %08lx  I3: %08lx\n",
+		 fp->b3, fp->l3, fp->m3, fp->i3);
+
+	debug("DCPLB_FAULT_ADDR=%p\n", *pDCPLB_FAULT_ADDR);
+	debug("ICPLB_FAULT_ADDR=%p\n", *pICPLB_FAULT_ADDR);
+
+}