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sh: Bring kgdb back from the dead.

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This code has suffered quite a bit of bitrot, do some basic
tidying to get it to a reasonably functional state again.
This gets the basic support and the console working again.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt
2007-03-08 17:27:37 +09:00
committed by Paul Mundt
parent 15700770ef
commit fa5da2f7bd
8 changed files with 101 additions and 369 deletions
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94
arch/sh/kernel/setup.c
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@ -25,11 +25,8 @@
#include <asm/setup.h>
#include <asm/clock.h>
#ifdef CONFIG_SH_KGDB
#include <asm/kgdb.h>
static int kgdb_parse_options(char *options);
#endif
extern void * __rd_start, * __rd_end;
/*
* Machine setup..
*/
@ -499,92 +496,3 @@ struct seq_operations cpuinfo_op = {
.show = show_cpuinfo,
};
#endif /* CONFIG_PROC_FS */
#ifdef CONFIG_SH_KGDB
/*
* Parse command-line kgdb options. By default KGDB is enabled,
* entered on error (or other action) using default serial info.
* The command-line option can include a serial port specification
* and an action to override default or configured behavior.
*/
struct kgdb_sermap kgdb_sci_sermap =
{ "ttySC", 5, kgdb_sci_setup, NULL };
struct kgdb_sermap *kgdb_serlist = &kgdb_sci_sermap;
struct kgdb_sermap *kgdb_porttype = &kgdb_sci_sermap;
void kgdb_register_sermap(struct kgdb_sermap *map)
{
struct kgdb_sermap *last;
for (last = kgdb_serlist; last->next; last = last->next)
;
last->next = map;
if (!map->namelen) {
map->namelen = strlen(map->name);
}
}
static int __init kgdb_parse_options(char *options)
{
char c;
int baud;
/* Check for port spec (or use default) */
/* Determine port type and instance */
if (!memcmp(options, "tty", 3)) {
struct kgdb_sermap *map = kgdb_serlist;
while (map && memcmp(options, map->name, map->namelen))
map = map->next;
if (!map) {
KGDB_PRINTK("unknown port spec in %s\n", options);
return -1;
}
kgdb_porttype = map;
kgdb_serial_setup = map->setup_fn;
kgdb_portnum = options[map->namelen] - '0';
options += map->namelen + 1;
options = (*options == ',') ? options+1 : options;
/* Read optional parameters (baud/parity/bits) */
baud = simple_strtoul(options, &options, 10);
if (baud != 0) {
kgdb_baud = baud;
c = toupper(*options);
if (c == 'E' || c == 'O' || c == 'N') {
kgdb_parity = c;
options++;
}
c = *options;
if (c == '7' || c == '8') {
kgdb_bits = c;
options++;
}
options = (*options == ',') ? options+1 : options;
}
}
/* Check for action specification */
if (!memcmp(options, "halt", 4)) {
kgdb_halt = 1;
options += 4;
} else if (!memcmp(options, "disabled", 8)) {
kgdb_enabled = 0;
options += 8;
}
if (*options) {
KGDB_PRINTK("ignored unknown options: %s\n", options);
return 0;
}
return 1;
}
__setup("kgdb=", kgdb_parse_options);
#endif /* CONFIG_SH_KGDB */