/* Simulator cache routines for CGEN simulators (and maybe others).
- Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
+ Copyright (C) 1996-2021 Free Software Foundation, Inc.
Contributed by Cygnus Support.
This file is part of GDB, the GNU debugger.
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, or (at your option)
-any later version.
+the Free Software Foundation; either version 3 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. */
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+/* This must come before any other includes. */
+#include "defs.h"
#define SCACHE_DEFINE_INLINE
#include "sim-main.h"
-#ifdef HAVE_STDLIB_H
#include <stdlib.h>
-#endif
#include "libiberty.h"
#include "sim-options.h"
#include "sim-io.h"
-#define MAX(a,b) ((a) > (b) ? (a) : (b))
-
/* Unused address. */
#define UNUSED_ADDR 0xffffffff
scache_option_handler (SIM_DESC sd, sim_cpu *cpu, int opt,
char *arg, int is_command)
{
- int n;
-
switch (opt)
{
case 'c' :
{
if (arg != NULL)
{
- int n = strtol (arg, NULL, 0);
+ unsigned int n = (unsigned int) strtoul (arg, NULL, 0);
if (n < MIN_SCACHE_SIZE)
{
- sim_io_eprintf (sd, "invalid scache size `%d', must be at least 4", n);
+ sim_io_eprintf (sd, "invalid scache size `%u', must be at least %u",
+ n, MIN_SCACHE_SIZE);
return SIM_RC_FAIL;
}
/* Ensure it's a multiple of 2. */
if ((n & (n - 1)) != 0)
{
- sim_io_eprintf (sd, "scache size `%d' not a multiple of 2\n", n);
- {
- /* round up to nearest multiple of 2 */
- int i;
- for (i = 1; i < n; i <<= 1)
- continue;
- n = i;
- }
- sim_io_eprintf (sd, "rounding scache size up to %d\n", n);
+ unsigned int i;
+ sim_io_eprintf (sd, "scache size `%u' not a multiple of 2\n", n);
+ /* Round up to nearest multiple of 2. */
+ for (i = 1; i && i < n; i <<= 1)
+ continue;
+ if (i)
+ {
+ n = i;
+ sim_io_eprintf (sd, "rounding scache size up to %u\n", n);
+ }
}
if (cpu == NULL)
STATE_SCACHE_SIZE (sd) = n;
return SIM_RC_OK;
}
+/* Provide a prototype to silence -Wmissing-prototypes. */
+SIM_RC sim_install_scache (SIM_DESC sd);
+
+/* Install the simulator cache into the simulator. */
SIM_RC
-scache_install (SIM_DESC sd)
+sim_install_scache (SIM_DESC sd)
{
sim_add_option_table (sd, NULL, scache_options);
sim_module_add_init_fn (sd, scache_init);
#if WITH_SCACHE_PBB
CPU_SCACHE_MAX_CHAIN_LENGTH (cpu) = MAX_CHAIN_LENGTH;
CPU_SCACHE_NUM_HASH_CHAIN_ENTRIES (cpu) = MAX_HASH_CHAIN_LENGTH;
- CPU_SCACHE_NUM_HASH_CHAINS (cpu) = MAX (MIN_HASH_CHAINS,
+ CPU_SCACHE_NUM_HASH_CHAINS (cpu) = max (MIN_HASH_CHAINS,
CPU_SCACHE_SIZE (cpu)
/ SCACHE_HASH_RATIO);
CPU_SCACHE_HASH_TABLE (cpu) =
SCACHE *
scache_lookup (SIM_CPU *cpu, IADDR pc)
{
+ /* FIXME: hash computation is wrong, doesn't take into account
+ NUM_HASH_CHAIN_ENTRIES. A lot of the hash table will be unused! */
unsigned int slot = HASH_PC (pc) & (CPU_SCACHE_NUM_HASH_CHAINS (cpu) - 1);
int i, max_i = CPU_SCACHE_NUM_HASH_CHAIN_ENTRIES (cpu);
SCACHE_MAP *scm;
SCACHE *
scache_lookup_or_alloc (SIM_CPU *cpu, IADDR pc, int n, SCACHE **bufp)
{
+ /* FIXME: hash computation is wrong, doesn't take into account
+ NUM_HASH_CHAIN_ENTRIES. A lot of the hash table will be unused! */
unsigned int slot = HASH_PC (pc) & (CPU_SCACHE_NUM_HASH_CHAINS (cpu) - 1);
int i, max_i = CPU_SCACHE_NUM_HASH_CHAIN_ENTRIES (cpu);
SCACHE_MAP *scm;
static int next_free = 0;
scm = & CPU_SCACHE_HASH_TABLE (cpu) [slot];
+ /* FIXME: This seems rather clumsy. */
for (i = 0; i < next_free; ++i, ++scm)
continue;
++next_free;
/* At this point SCM points to the hash table entry to use.
Now make sure there's room in the cache. */
+ /* FIXME: Kinda weird to use a next_free adjusted scm when cache is
+ flushed. */
{
int elm_size = IMP_PROPS_SCACHE_ELM_SIZE (MACH_IMP_PROPS (CPU_MACH (cpu)));
i,
max_val < 10000 ? 5 : 10,
sim_add_commas (buf, sizeof (buf), lengths[i]));
- sim_profile_print_bar (sd, PROFILE_HISTOGRAM_WIDTH,
+ sim_profile_print_bar (sd, cpu, PROFILE_HISTOGRAM_WIDTH,
lengths[i], max_val);
sim_io_printf (sd, "\n");
}