/*
* Look for an Intel MP spec table, indicating SMP capable hardware.
*/
int
mpbios_probe(struct device *self)
{
paddr_t ebda, memtop;
paddr_t cthpa;
int cthlen;
const u_int8_t *mpbios_page;
int scan_loc;
struct mp_map t;
/*
* Skip probe if someone else (e.g. acpi) already provided the
* necessary details.
*/
if (mp_busses)
return (0);
/* see if EBDA exists */
mpbios_page = mpbios_map(0, PAGE_SIZE, &t);
/* XXX Ugly magic constants below. */
ebda = *(const u_int16_t *)(&mpbios_page[0x40e]);
ebda <<= 4;
memtop = *(const u_int16_t *)(&mpbios_page[0x413]);
memtop <<= 10;
mpbios_page = NULL;
mpbios_unmap(&t);
scan_loc = 0;
if (ebda && ebda < IOM_BEGIN ) {
mp_fps = mpbios_search(self, ebda, 1024, &mp_fp_map);
if (mp_fps != NULL)
goto found;
}
scan_loc = 1;
if (memtop && memtop <= IOM_BEGIN ) {
mp_fps = mpbios_search(self, memtop - 1024, 1024, &mp_fp_map);
if (mp_fps != NULL)
goto found;
}
scan_loc = 2;
mp_fps = mpbios_search(self, BIOS_BASE, BIOS_COUNT, &mp_fp_map);
if (mp_fps != NULL)
goto found;
/* nothing found */
return (0);
found:
if (mp_verbose)
printf("%s: MP floating pointer found in %s at 0x%lx\n",
self->dv_xname, loc_where[scan_loc], mp_fp_map.pa);
if (mp_fps->pap == 0) {
if (mp_fps->mpfb1 == 0) {
printf("%s: MP fps invalid: "
"no default config and no configuration table\n",
self->dv_xname);
goto err;
}
printf("%s: MP default configuration %d\n",
self->dv_xname, mp_fps->mpfb1);
return (10);
}
cthpa = mp_fps->pap;
mp_cth = mpbios_map(cthpa, sizeof (*mp_cth), &mp_cfg_table_map);
cthlen = mp_cth->base_len;
mpbios_unmap(&mp_cfg_table_map);
mp_cth = mpbios_map(cthpa, cthlen, &mp_cfg_table_map);
if (mp_verbose)
printf("%s: MP config table at 0x%lx, %d bytes long\n",
self->dv_xname, cthpa, cthlen);
if (mp_cth->signature != MP_CT_SIG) {
printf("%s: MP signature mismatch (%x vs %x)\n",
self->dv_xname,
MP_CT_SIG, mp_cth->signature);
goto err;
}
if (mpbios_cksum(mp_cth, cthlen)) {
printf ("%s: MP Configuration Table checksum mismatch\n",
self->dv_xname);
goto err;
}
return (10);
err:
if (mp_fps) {
mp_fps = NULL;
mpbios_unmap(&mp_fp_map);
}
if (mp_cth) {
mp_cth = NULL;
mpbios_unmap(&mp_cfg_table_map);
}
return (0);
}
/*
* Look for an Intel MP spec table, indicating SMP capable hardware.
*/
int
mpbios_probe(device_t self)
{
paddr_t ebda, memtop;
paddr_t cthpa;
int cthlen;
const uint8_t *mpbios_page;
int scan_loc;
struct mp_map t;
/* If MP is disabled, don't use MPBIOS or the ioapics. */
if ((boothowto & RB_MD1) != 0)
return 0;
/* see if EBDA exists */
mpbios_page = mpbios_map (0, PAGE_SIZE, &t);
ebda = *(const uint16_t *) (&mpbios_page[0x40e]);
ebda <<= 4;
memtop = *(const uint16_t *) (&mpbios_page[0x413]);
memtop <<= 10;
mpbios_page = NULL;
mpbios_unmap(&t);
scan_loc = 0;
if (ebda && ebda < IOM_BEGIN ) {
mp_fps = mpbios_search(self, ebda, 1024, &mp_fp_map);
if (mp_fps != NULL)
goto found;
}
scan_loc = 1;
if (memtop && memtop <= IOM_BEGIN ) {
mp_fps = mpbios_search(self, memtop - 1024, 1024, &mp_fp_map);
if (mp_fps != NULL)
goto found;
}
scan_loc = 2;
mp_fps = mpbios_search(self, BIOS_BASE, BIOS_COUNT, &mp_fp_map);
if (mp_fps != NULL)
goto found;
/* nothing found */
return 0;
found:
if (mp_verbose)
aprint_verbose_dev(self, "MP floating pointer found in %s at 0x%jx\n",
loc_where[scan_loc], (uintmax_t)mp_fp_map.pa);
if (mp_fps->pap == 0) {
if (mp_fps->mpfb1 == 0) {
aprint_error_dev(self, "MP fps invalid: "
"no default config and no configuration table\n");
goto err;
}
return 10;
}
cthpa = mp_fps->pap;
mp_cth = mpbios_map (cthpa, sizeof (*mp_cth), &mp_cfg_table_map);
cthlen = mp_cth->base_len;
mpbios_unmap(&mp_cfg_table_map);
mp_cth = mpbios_map (cthpa, cthlen, &mp_cfg_table_map);
if (mp_verbose)
aprint_verbose_dev(self, "MP config table at 0x%jx, %d bytes long\n",
(uintmax_t)cthpa, cthlen);
if (mp_cth->signature != MP_CT_SIG) {
aprint_error_dev(self, "MP signature mismatch (%x vs %x)\n",
MP_CT_SIG, mp_cth->signature);
goto err;
}
if (mpbios_cksum(mp_cth, cthlen)) {
aprint_error_dev(self, "MP Configuration Table checksum mismatch\n");
goto err;
}
return 10;
err:
if (mp_fps) {
mp_fps = NULL;
mpbios_unmap(&mp_fp_map);
}
if (mp_cth) {
mp_cth = NULL;
mpbios_unmap(&mp_cfg_table_map);
}
return 0;
}
