mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 09:48:16 +00:00
8bde7f776c
- remove trailing white space, trailing empty lines, C++ comments, etc.
- split cmd_boot.c (separate cmd_bdinfo.c and cmd_load.c)
* Patches by Kenneth Johansson, 25 Jun 2003:
- major rework of command structure
(work done mostly by Michal Cendrowski and Joakim Kristiansen)
83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
/*
|
|
* Copyright (C) 1999 Magnus Damm <kieraypc01.p.y.kie.era.ericsson.se>
|
|
*
|
|
* (C) Copyright 2000
|
|
* 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>
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
while (first <= last) {
|
|
const struct exception_table_entry *mid;
|
|
long diff;
|
|
|
|
mid = (last - first) / 2 + first;
|
|
diff = mid->insn - value;
|
|
if (diff == 0)
|
|
return mid->fixup;
|
|
else if (diff < 0)
|
|
first = mid+1;
|
|
else
|
|
last = mid-1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int ex_tab_message = 1;
|
|
|
|
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 (ex_tab_message)
|
|
printf("Bus Fault @ 0x%08lx, fixup 0x%08lx\n", addr, ret);
|
|
if (ret) return ret;
|
|
|
|
return 0;
|
|
}
|