static int
cris_insert_point (char type, CORE_ADDR addr, int len)
{
int bp;
unsigned long bp_ctrl;
unsigned long start, end;
unsigned long ccs;
struct regcache *regcache;
/* Breakpoint/watchpoint types (GDB terminology):
0 = memory breakpoint for instructions
(not supported; done via memory write instead)
1 = hardware breakpoint for instructions (not supported)
2 = write watchpoint (supported)
3 = read watchpoint (supported)
4 = access watchpoint (supported). */
if (type < '2' || type > '4')
{
/* Unsupported. */
return 1;
}
regcache = get_thread_regcache (current_inferior, 1);
/* Read watchpoints are set as access watchpoints, because of GDB's
inability to deal with pure read watchpoints. */
if (type == '3')
type = '4';
/* Get the configuration register. */
collect_register_by_name (regcache, "s0", &bp_ctrl);
/* The watchpoint allocation scheme is the simplest possible.
For example, if a region is watched for read and
a write watch is requested, a new watchpoint will
be used. Also, if a watch for a region that is already
covered by one or more existing watchpoints, a new
watchpoint will be used. */
/* First, find a free data watchpoint. */
for (bp = 0; bp < 6; bp++)
{
/* Each data watchpoint's control registers occupy 2 bits
(hence the 3), starting at bit 2 for D0 (hence the 2)
with 4 bits between for each watchpoint (yes, the 4). */
if (!(bp_ctrl & (0x3 << (2 + (bp * 4)))))
break;
}
if (bp > 5)
{
/* We're out of watchpoints. */
return -1;
}
/* Configure the control register first. */
if (type == '3' || type == '4')
{
/* Trigger on read. */
bp_ctrl |= (1 << (2 + bp * 4));
}
if (type == '2' || type == '4')
{
/* Trigger on write. */
bp_ctrl |= (2 << (2 + bp * 4));
}
/* Setup the configuration register. */
supply_register_by_name (regcache, "s0", &bp_ctrl);
/* Setup the range. */
start = addr;
end = addr + len - 1;
/* Configure the watchpoint register. */
cris_write_data_breakpoint (regcache, bp, start, end);
collect_register_by_name (regcache, "ccs", &ccs);
/* Set the S1 flag to enable watchpoints. */
ccs |= (1 << 19);
supply_register_by_name (regcache, "ccs", &ccs);
return 0;
}
static int
cris_insert_point (enum raw_bkpt_type type, CORE_ADDR addr,
int len, struct raw_breakpoint *bp)
{
int bp;
unsigned long bp_ctrl;
unsigned long start, end;
unsigned long ccs;
struct regcache *regcache;
regcache = get_thread_regcache (current_thread, 1);
/* Read watchpoints are set as access watchpoints, because of GDB's
inability to deal with pure read watchpoints. */
if (type == raw_bkpt_type_read_wp)
type = raw_bkpt_type_access_wp;
/* Get the configuration register. */
collect_register_by_name (regcache, "s0", &bp_ctrl);
/* The watchpoint allocation scheme is the simplest possible.
For example, if a region is watched for read and
a write watch is requested, a new watchpoint will
be used. Also, if a watch for a region that is already
covered by one or more existing watchpoints, a new
watchpoint will be used. */
/* First, find a free data watchpoint. */
for (bp = 0; bp < 6; bp++)
{
/* Each data watchpoint's control registers occupy 2 bits
(hence the 3), starting at bit 2 for D0 (hence the 2)
with 4 bits between for each watchpoint (yes, the 4). */
if (!(bp_ctrl & (0x3 << (2 + (bp * 4)))))
break;
}
if (bp > 5)
{
/* We're out of watchpoints. */
return -1;
}
/* Configure the control register first. */
if (type == raw_bkpt_type_read_wp || type == raw_bkpt_type_access_wp)
{
/* Trigger on read. */
bp_ctrl |= (1 << (2 + bp * 4));
}
if (type == raw_bkpt_type_write_wp || type == raw_bkpt_type_access_wp)
{
/* Trigger on write. */
bp_ctrl |= (2 << (2 + bp * 4));
}
/* Setup the configuration register. */
supply_register_by_name (regcache, "s0", &bp_ctrl);
/* Setup the range. */
start = addr;
end = addr + len - 1;
/* Configure the watchpoint register. */
cris_write_data_breakpoint (regcache, bp, start, end);
collect_register_by_name (regcache, "ccs", &ccs);
/* Set the S1 flag to enable watchpoints. */
ccs |= (1 << 19);
supply_register_by_name (regcache, "ccs", &ccs);
return 0;
}
