char *
prom_bootpath(void)
{
static char bootpath[OBP_MAXPATHLEN];
int length;
pnode_t node;
static char *name = "bootpath";
if (bootpath[0] != (char)0)
return (bootpath);
node = prom_chosennode();
if ((node == OBP_NONODE) || (node == OBP_BADNODE))
node = prom_rootnode();
length = prom_getproplen(node, name);
if ((length == -1) || (length == 0))
return (NULL);
if (length > OBP_MAXPATHLEN)
length = OBP_MAXPATHLEN - 1; /* Null terminator */
(void) prom_bounded_getprop(node, name, bootpath, length);
return (bootpath);
}
/*ARGSUSED*/
char *
kmdb_prom_get_ddi_prop(kmdb_auxv_t *kav, char *propname)
{
pnode_t node;
ssize_t len;
char *val;
if ((node = prom_finddevice("/options")) == NULL)
return (NULL);
if ((len = prom_getproplen(node, propname)) < 0)
return (NULL);
val = mdb_alloc(len + 1, UM_SLEEP);
if (prom_bounded_getprop(node, propname, val, len) != len) {
mdb_free(val, len);
return (NULL);
}
val[len] = '\0';
return (val);
}
/*
* Platform specific lgroup initialization
*/
void
plat_lgrp_init(void)
{
pnode_t curnode;
char tmp_name[sizeof (OBP_CPU) + 1]; /* extra padding */
int portid;
int cpucnt = 0;
int max_portid = -1;
extern uint32_t lgrp_expand_proc_thresh;
extern uint32_t lgrp_expand_proc_diff;
extern pgcnt_t lgrp_mem_free_thresh;
extern uint32_t lgrp_loadavg_tolerance;
extern uint32_t lgrp_loadavg_max_effect;
extern uint32_t lgrp_load_thresh;
extern lgrp_mem_policy_t lgrp_mem_policy_root;
/*
* Count the number of CPUs installed to determine if
* NUMA optimization should be enabled or not.
*
* All CPU nodes reside in the root node and have a
* device type "cpu".
*/
curnode = prom_rootnode();
for (curnode = prom_childnode(curnode); curnode;
curnode = prom_nextnode(curnode)) {
bzero(tmp_name, sizeof (tmp_name));
if (prom_bounded_getprop(curnode, OBP_DEVICETYPE, tmp_name,
sizeof (OBP_CPU)) == -1 || strcmp(tmp_name, OBP_CPU) != 0)
continue;
cpucnt++;
if (prom_getprop(curnode, "portid", (caddr_t)&portid) !=
-1 && portid > max_portid)
max_portid = portid;
}
if (cpucnt <= 1)
max_mem_nodes = 1;
else if (max_portid >= 0 && max_portid < MAX_MEM_NODES)
max_mem_nodes = max_portid + 1;
/*
* Set tuneables for fiesta architecture
*
* lgrp_expand_proc_thresh is the minimum load on the lgroups
* this process is currently running on before considering
* expanding threads to another lgroup.
*
* lgrp_expand_proc_diff determines how much less the remote lgroup
* must be loaded before expanding to it.
*
* Optimize for memory bandwidth by spreading multi-threaded
* program to different lgroups.
*/
lgrp_expand_proc_thresh = lgrp_loadavg_max_effect - 1;
lgrp_expand_proc_diff = lgrp_loadavg_max_effect / 2;
lgrp_loadavg_tolerance = lgrp_loadavg_max_effect / 2;
lgrp_mem_free_thresh = 1; /* home lgrp must have some memory */
lgrp_expand_proc_thresh = lgrp_loadavg_max_effect - 1;
lgrp_mem_policy_root = LGRP_MEM_POLICY_NEXT;
lgrp_load_thresh = 0;
mem_node_pfn_shift = PLATFORM_MC_SHIFT - MMU_PAGESHIFT;
}
