upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
257 lines
6.0 KiB
257 lines
6.0 KiB
/*
|
|
* (C) Copyright 2000
|
|
* 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
|
|
*/
|
|
|
|
/*
|
|
* This file handles the architecture-dependent parts of hardware
|
|
* exceptions
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <kgdb.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/mpc8349_pci.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
/* Returns 0 if exception not found and fixup otherwise. */
|
|
extern unsigned long search_exception_table(unsigned long);
|
|
|
|
#define END_OF_MEM (gd->bd->bi_memstart + gd->bd->bi_memsize)
|
|
|
|
/*
|
|
* Trap & Exception support
|
|
*/
|
|
|
|
static 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');
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void _exception(int signr, struct pt_regs *regs)
|
|
{
|
|
show_regs(regs);
|
|
print_backtrace((unsigned long *)regs->gpr[1]);
|
|
panic("Exception in kernel pc %lx signal %d",regs->nip,signr);
|
|
}
|
|
|
|
#ifdef CONFIG_PCI
|
|
void dump_pci (void)
|
|
{
|
|
/*
|
|
volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
|
|
printf ("PCI: err status %x err mask %x err ctrl %x\n",
|
|
le32_to_cpu (immap->im_pci.pci_esr),
|
|
le32_to_cpu (immap->im_pci.pci_emr),
|
|
le32_to_cpu (immap->im_pci.pci_ecr));
|
|
printf (" error address %x error data %x ctrl %x\n",
|
|
le32_to_cpu (immap->im_pci.pci_eacr),
|
|
le32_to_cpu (immap->im_pci.pci_edcr),
|
|
le32_to_cpu (immap->im_pci.pci_eccr));
|
|
*/
|
|
}
|
|
#endif
|
|
|
|
void MachineCheckException(struct pt_regs *regs)
|
|
{
|
|
unsigned long fixup;
|
|
|
|
/* Probing PCI using config cycles cause this exception
|
|
* when a device is not present. Catch it and return to
|
|
* the PCI exception handler.
|
|
*/
|
|
#ifdef CONFIG_PCI
|
|
#if 0
|
|
volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
|
|
#ifdef DEBUG
|
|
dump_pci();
|
|
#endif
|
|
/* clear the error in the error status register */
|
|
if(immap->im_pci.pci_esr & cpu_to_le32(PCI_ERROR_PCI_NO_RSP)) {
|
|
immap->im_pci.pci_esr = cpu_to_le32(PCI_ERROR_PCI_NO_RSP);
|
|
return;
|
|
}
|
|
#endif
|
|
#endif /* CONFIG_PCI */
|
|
if ((fixup = search_exception_table(regs->nip)) != 0) {
|
|
regs->nip = fixup;
|
|
return;
|
|
}
|
|
|
|
#if defined(CONFIG_CMD_KGDB)
|
|
if (debugger_exception_handler && (*debugger_exception_handler)(regs))
|
|
return;
|
|
#endif
|
|
|
|
puts ("Machine check in kernel mode.\n"
|
|
"Caused by (from msr): ");
|
|
printf("regs %p ",regs);
|
|
switch( regs->msr & 0x000F0000) {
|
|
case (0x80000000>>12):
|
|
puts ("Machine check signal - probably due to mm fault\n"
|
|
"with mmu off\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]);
|
|
#ifdef CONFIG_PCI
|
|
dump_pci();
|
|
#endif
|
|
panic("machine check");
|
|
}
|
|
|
|
void AlignmentException(struct pt_regs *regs)
|
|
{
|
|
#if defined(CONFIG_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 defined(CONFIG_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 defined(CONFIG_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 defined(CONFIG_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 defined(CONFIG_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 defined(CONFIG_CMD_BEDBUG)
|
|
do_bedbug_breakpoint( regs );
|
|
#endif
|
|
}
|
|
|
|
/* Probe an address by reading. If not present, return -1, otherwise
|
|
* return 0.
|
|
*/
|
|
int addr_probe(uint *addr)
|
|
{
|
|
#if 0
|
|
int retval;
|
|
|
|
__asm__ __volatile__( \
|
|
"1: lwz %0,0(%1)\n" \
|
|
" eieio\n" \
|
|
" li %0,0\n" \
|
|
"2:\n" \
|
|
".section .fixup,\"ax\"\n" \
|
|
"3: li %0,-1\n" \
|
|
" b 2b\n" \
|
|
".section __ex_table,\"a\"\n" \
|
|
" .align 2\n" \
|
|
" .long 1b,3b\n" \
|
|
".text" \
|
|
: "=r" (retval) : "r"(addr));
|
|
|
|
return (retval);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|