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/*
* 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>
#ifdef DEBUG
#define pr_debug(fmt,arg...) printf(fmt,##arg)
#else
static inline int
__attribute__ ((format(printf, 1, 2))) pr_debug(const char *fmt, ...)
{
return 0;
}
#endif
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)) {
pr_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) {
__builtin_bfin_ssync();
asm(" .align 8; ");
*(unsigned int *)DMEM_CONTROL &=
~(ACACHE_BCACHE | ENDCPLB | PORT_PREF0);
__builtin_bfin_ssync();
} else {
__builtin_bfin_ssync();
asm(" .align 8; ");
*(unsigned int *)IMEM_CONTROL &= ~(IMC | ENICPLB);
__builtin_bfin_ssync();
}
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) {
pr_debug("skipping %i %08p - %08x\n", j, I1, *I1);
*I0++;
*I1++;
j++;
}
pr_debug("remove %i 0x%08x 0x%08x\n", j, *I0, *I1);
for (; j < 15; j++) {
pr_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++) {
pr_debug("%i 0x%08x 0x%08x\n", j, *I0++, *I1++);
}
/* Turn the cache back on */
if (data) {
j = *(unsigned int *)DMEM_CONTROL;
__builtin_bfin_ssync();
asm(" .align 8; ");
*(unsigned int *)DMEM_CONTROL =
ACACHE_BCACHE | ENDCPLB | PORT_PREF0 | j;
__builtin_bfin_ssync();
} else {
__builtin_bfin_ssync();
asm(" .align 8; ");
*(unsigned int *)IMEM_CONTROL = IMC | ENICPLB;
__builtin_bfin_ssync();
}
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)
{
pr_debug("RETE: %08lx RETN: %08lx RETX: %08lx RETS: %08lx\n",
fp->rete, fp->retn, fp->retx, fp->rets);
pr_debug("IPEND: %04lx SYSCFG: %04lx\n", fp->ipend, fp->syscfg);
pr_debug("SEQSTAT: %08lx SP: %08lx\n", (long)fp->seqstat, (long)fp);
pr_debug("R0: %08lx R1: %08lx R2: %08lx R3: %08lx\n",
fp->r0, fp->r1, fp->r2, fp->r3);
pr_debug("R4: %08lx R5: %08lx R6: %08lx R7: %08lx\n",
fp->r4, fp->r5, fp->r6, fp->r7);
pr_debug("P0: %08lx P1: %08lx P2: %08lx P3: %08lx\n",
fp->p0, fp->p1, fp->p2, fp->p3);
pr_debug("P4: %08lx P5: %08lx FP: %08lx\n",
fp->p4, fp->p5, fp->fp);
pr_debug("A0.w: %08lx A0.x: %08lx A1.w: %08lx A1.x: %08lx\n",
fp->a0w, fp->a0x, fp->a1w, fp->a1x);
pr_debug("LB0: %08lx LT0: %08lx LC0: %08lx\n",
fp->lb0, fp->lt0, fp->lc0);
pr_debug("LB1: %08lx LT1: %08lx LC1: %08lx\n",
fp->lb1, fp->lt1, fp->lc1);
pr_debug("B0: %08lx L0: %08lx M0: %08lx I0: %08lx\n",
fp->b0, fp->l0, fp->m0, fp->i0);
pr_debug("B1: %08lx L1: %08lx M1: %08lx I1: %08lx\n",
fp->b1, fp->l1, fp->m1, fp->i1);
pr_debug("B2: %08lx L2: %08lx M2: %08lx I2: %08lx\n",
fp->b2, fp->l2, fp->m2, fp->i2);
pr_debug("B3: %08lx L3: %08lx M3: %08lx I3: %08lx\n",
fp->b3, fp->l3, fp->m3, fp->i3);
pr_debug("DCPLB_FAULT_ADDR=%p\n", *pDCPLB_FAULT_ADDR);
pr_debug("ICPLB_FAULT_ADDR=%p\n", *pICPLB_FAULT_ADDR);
}
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