mirror of
https://github.com/u-boot/u-boot.git
synced 2025-05-05 11:13:32 +00:00
d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 1999 Magnus Damm <kieraypc01.p.y.kie.era.ericsson.se>
|
|
*
|
|
* (C) Copyright 2000
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*/
|
|
#include <common.h>
|
|
#include <log.h>
|
|
|
|
/*
|
|
* The exception table consists of pairs of addresses: the first is the
|
|
* address of an instruction that is allowed to fault, and the second is
|
|
* the address at which the program should continue. No registers are
|
|
* modified, so it is entirely up to the continuation code to figure out
|
|
* what to do.
|
|
*
|
|
* All the routines below use bits of fixup code that are out of line
|
|
* with the main instruction path. This means when everything is well,
|
|
* we don't even have to jump over them. Further, they do not intrude
|
|
* on our cache or tlb entries.
|
|
*/
|
|
|
|
struct exception_table_entry
|
|
{
|
|
unsigned long insn, fixup;
|
|
};
|
|
|
|
extern const struct exception_table_entry __start___ex_table[];
|
|
extern const struct exception_table_entry __stop___ex_table[];
|
|
|
|
static inline unsigned long
|
|
search_one_table(const struct exception_table_entry *first,
|
|
const struct exception_table_entry *last,
|
|
unsigned long value)
|
|
{
|
|
long diff;
|
|
while (first <= last) {
|
|
diff = first->insn - value;
|
|
if (diff == 0)
|
|
return first->fixup;
|
|
first++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
unsigned long
|
|
search_exception_table(unsigned long addr)
|
|
{
|
|
unsigned long ret;
|
|
|
|
/* There is only the kernel to search. */
|
|
ret = search_one_table(__start___ex_table, __stop___ex_table-1, addr);
|
|
/* if the serial port does not hang in exception, printf can be used */
|
|
#if !defined(CONFIG_SYS_SERIAL_HANG_IN_EXCEPTION)
|
|
debug("Bus Fault @ 0x%08lx, fixup 0x%08lx\n", addr, ret);
|
|
#endif
|
|
if (ret) return ret;
|
|
|
|
return 0;
|
|
}
|