#include <asm/io.h>
#include <asm/mach-summit/mach_mpparse.h>
-static void __init setup_pci_node_map_for_wpeg(int wpeg_num, struct rio_table_hdr *rth,
- struct scal_detail **scal_nodes, struct rio_detail **rio_nodes){
- int twst_num = 0, node = 0, first_bus = 0;
- int i, bus, num_busses;
-
- for(i = 0; i < rth->num_rio_dev; i++){
- if (rio_nodes[i]->node_id == rio_nodes[wpeg_num]->owner_id){
- twst_num = rio_nodes[i]->owner_id;
+static struct rio_table_hdr *rio_table_hdr __initdata;
+static struct scal_detail *scal_devs[MAX_NUMNODES] __initdata;
+static struct rio_detail *rio_devs[MAX_NUMNODES*4] __initdata;
+
+static int __init setup_pci_node_map_for_wpeg(int wpeg_num, int last_bus)
+{
+ int twister = 0, node = 0;
+ int i, bus, num_buses;
+
+ for(i = 0; i < rio_table_hdr->num_rio_dev; i++){
+ if (rio_devs[i]->node_id == rio_devs[wpeg_num]->owner_id){
+ twister = rio_devs[i]->owner_id;
break;
}
}
- if (i == rth->num_rio_dev){
- printk("%s: Couldn't find owner Cyclone for Winnipeg!\n", __FUNCTION__);
- return;
+ if (i == rio_table_hdr->num_rio_dev){
+ printk(KERN_ERR "%s: Couldn't find owner Cyclone for Winnipeg!\n", __FUNCTION__);
+ return last_bus;
}
- for(i = 0; i < rth->num_scal_dev; i++){
- if (scal_nodes[i]->node_id == twst_num){
- node = scal_nodes[i]->node_id;
+ for(i = 0; i < rio_table_hdr->num_scal_dev; i++){
+ if (scal_devs[i]->node_id == twister){
+ node = scal_devs[i]->node_id;
break;
}
}
- if (i == rth->num_scal_dev){
- printk("%s: Couldn't find owner Twister for Cyclone!\n", __FUNCTION__);
- return;
+ if (i == rio_table_hdr->num_scal_dev){
+ printk(KERN_ERR "%s: Couldn't find owner Twister for Cyclone!\n", __FUNCTION__);
+ return last_bus;
}
- switch (rio_nodes[wpeg_num]->type){
+ switch (rio_devs[wpeg_num]->type){
case CompatWPEG:
- /* The Compatability Winnipeg controls the legacy busses
- (busses 0 & 1), the 66MHz PCI bus [2 slots] (bus 2),
- and the "extra" busses in case a PCI-PCI bridge card is
- used in either slot (busses 3 & 4): total 5 busses. */
- num_busses = 5;
- /* The BIOS numbers the busses starting at 1, and in a
- slightly wierd manner. You'll have to trust that
- the math used below to determine the number of the
- first bus works. */
- first_bus = (rio_nodes[wpeg_num]->first_slot - 1) * 2;
+ /* The Compatability Winnipeg controls the 2 legacy buses,
+ * the 66MHz PCI bus [2 slots] and the 2 "extra" buses in case
+ * a PCI-PCI bridge card is used in either slot: total 5 buses.
+ */
+ num_buses = 5;
break;
case AltWPEG:
- /* The Alternate/Secondary Winnipeg controls the 1st 133MHz
- bus [1 slot] & its "extra" bus (busses 0 & 1), the 2nd
- 133MHz bus [1 slot] & its "extra" bus (busses 2 & 3), the
- 100MHz bus [2 slots] (bus 4), and the "extra" busses for
- the 2 100MHz slots (busses 5 & 6): total 7 busses. */
- num_busses = 7;
- first_bus = (rio_nodes[wpeg_num]->first_slot * 2) - 1;
+ /* The Alternate Winnipeg controls the 2 133MHz buses [1 slot
+ * each], their 2 "extra" buses, the 100MHz bus [2 slots] and
+ * the "extra" buses for each of those slots: total 7 buses.
+ */
+ num_buses = 7;
break;
case LookOutAWPEG:
case LookOutBWPEG:
- printk("%s: LookOut Winnipegs not supported yet!\n", __FUNCTION__);
- return;
+ /* A Lookout Winnipeg controls 3 100MHz buses [2 slots each]
+ * & the "extra" buses for each of those slots: total 9 buses.
+ */
+ num_buses = 9;
+ break;
default:
- printk("%s: Unsupported Winnipeg type!\n", __FUNCTION__);
- return;
+ printk(KERN_INFO "%s: Unsupported Winnipeg type!\n", __FUNCTION__);
+ return last_bus;
}
- for(bus = first_bus; bus < first_bus + num_busses; bus++)
+ for(bus = last_bus; bus < last_bus + num_buses; bus++)
mp_bus_id_to_node[bus] = node;
+ return bus;
}
-static int __init build_detail_arrays(struct rio_table_hdr *rth,
- struct scal_detail **sd, struct rio_detail **rd){
+static int __init build_detail_arrays(void)
+{
unsigned long ptr;
int i, scal_detail_size, rio_detail_size;
- if ((rth->num_scal_dev > MAX_NUMNODES) ||
- (rth->num_rio_dev > MAX_NUMNODES * 2)){
- printk("%s: MAX_NUMNODES too low! Defined as %d, but system has %d nodes.\n", __FUNCTION__, MAX_NUMNODES, rth->num_scal_dev);
- return 1;
+ if (rio_table_hdr->num_scal_dev > MAX_NUMNODES){
+ printk(KERN_WARNING "%s: MAX_NUMNODES too low! Defined as %d, but system has %d nodes.\n", __FUNCTION__, MAX_NUMNODES, rio_table_hdr->num_scal_dev);
+ return 0;
}
- switch (rth->version){
+ switch (rio_table_hdr->version){
default:
- printk("%s: Bad Rio Grande Table Version: %d\n", __FUNCTION__, rth->version);
- return 1;
+ printk(KERN_WARNING "%s: Invalid Rio Grande Table Version: %d\n", __FUNCTION__, rio_table_hdr->version);
+ return 0;
case 2:
scal_detail_size = 11;
rio_detail_size = 13;
break;
}
- ptr = (unsigned long)rth + 3;
- for(i = 0; i < rth->num_scal_dev; i++)
- sd[i] = (struct scal_detail *)(ptr + (scal_detail_size * i));
+ ptr = (unsigned long)rio_table_hdr + 3;
+ for(i = 0; i < rio_table_hdr->num_scal_dev; i++, ptr += scal_detail_size)
+ scal_devs[i] = (struct scal_detail *)ptr;
- ptr += scal_detail_size * rth->num_scal_dev;
- for(i = 0; i < rth->num_rio_dev; i++)
- rd[i] = (struct rio_detail *)(ptr + (rio_detail_size * i));
+ for(i = 0; i < rio_table_hdr->num_rio_dev; i++, ptr += rio_detail_size)
+ rio_devs[i] = (struct rio_detail *)ptr;
- return 0;
+ return 1;
}
void __init setup_summit(void)
{
- struct rio_table_hdr *rio_table_hdr = NULL;
- struct scal_detail *scal_devs[MAX_NUMNODES];
- struct rio_detail *rio_devs[MAX_NUMNODES*2];
unsigned long ptr;
unsigned short offset;
- int i;
-
- memset(mp_bus_id_to_node, -1, sizeof(mp_bus_id_to_node));
+ int i, next_wpeg, next_bus = 0;
/* The pointer to the EBDA is stored in the word @ phys 0x40E(40:0E) */
ptr = *(unsigned short *)phys_to_virt(0x40Eul);
ptr = (unsigned long)phys_to_virt(ptr << 4);
+ rio_table_hdr = NULL;
offset = 0x180;
while (offset){
/* The block id is stored in the 2nd word */
offset = *((unsigned short *)(ptr + offset));
}
if (!rio_table_hdr){
- printk("%s: Unable to locate Rio Grande Table in EBDA - bailing!\n", __FUNCTION__);
+ printk(KERN_ERR "%s: Unable to locate Rio Grande Table in EBDA - bailing!\n", __FUNCTION__);
return;
}
- if (build_detail_arrays(rio_table_hdr, scal_devs, rio_devs))
+ if (!build_detail_arrays())
return;
- for(i = 0; i < rio_table_hdr->num_rio_dev; i++)
- if (is_WPEG(rio_devs[i]->type))
- /* It's a Winnipeg, it's got PCI Busses */
- setup_pci_node_map_for_wpeg(i, rio_table_hdr, scal_devs, rio_devs);
+ /* The first Winnipeg we're looking for has an index of 0 */
+ next_wpeg = 0;
+ do {
+ for(i = 0; i < rio_table_hdr->num_rio_dev; i++){
+ if (is_WPEG(rio_devs[i]) && rio_devs[i]->WP_index == next_wpeg){
+ /* It's the Winnipeg we're looking for! */
+ next_bus = setup_pci_node_map_for_wpeg(i, next_bus);
+ next_wpeg++;
+ break;
+ }
+ }
+ /*
+ * If we go through all Rio devices and don't find one with
+ * the next index, it means we've found all the Winnipegs,
+ * and thus all the PCI buses.
+ */
+ if (i == rio_table_hdr->num_rio_dev)
+ next_wpeg = 0;
+ } while (next_wpeg != 0);
}
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