mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
62 lines
1.6 KiB
C
62 lines
1.6 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>
|
|
|
|
/*
|
|
* 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;
|
|
}
|