1 files changed, 36 insertions, 6 deletions

diff --git a/src/mainboard/tyan/s2882/auto.c b/src/mainboard/tyan/s2882/auto.c
index fb7a63abb5..910db9e8a5 100644
--- a/src/mainboard/tyan/s2882/auto.c
+++ b/src/mainboard/tyan/s2882/auto.c
@@ -27,20 +27,52 @@
 
 #define SERIAL_DEV PNP_DEV(0x2e, W83627HF_SP1)
 
+/* Look up a which bus a given node/link combination is on.
+ * return 0 when we can't find the answer.
+ */
+static unsigned node_link_to_bus(unsigned node, unsigned link)
+{
+        unsigned reg;
+        
+        for(reg = 0xE0; reg < 0xF0; reg += 0x04) {
+                unsigned config_map;
+                config_map = pci_read_config32(PCI_DEV(0, 0x18, 1), reg);
+                if ((config_map & 3) != 3) {
+                        continue; 
+                }       
+                if ((((config_map >> 4) & 7) == node) &&
+                        (((config_map >> 8) & 3) == link))
+                {       
+                        return (config_map >> 16) & 0xff;
+                }       
+        }       
+        return 0;
+}       
+
 static void hard_reset(void)
 {
+        device_t dev;
+
+        /* Find the device */
+        dev = PCI_DEV(node_link_to_bus(0, 0), 0x04, 3);
+
         set_bios_reset();
-        
+
         /* enable cf9 */
-        pci_write_config8(PCI_DEV(0, 0x04, 3), 0x41, 0xf1);
+        pci_write_config8(dev, 0x41, 0xf1);
         /* reset */
         outb(0x0e, 0x0cf9);
 }
 
 static void soft_reset(void)
 {
+        device_t dev;
+
+        /* Find the device */
+        dev = PCI_DEV(node_link_to_bus(0, 0), 0x04, 0);
+
         set_bios_reset();
-        pci_write_config8(PCI_DEV(0, 0x04, 0), 0x47, 1);
+        pci_write_config8(dev, 0x47, 1);
 }
 
 #define REV_B_RESET 0
@@ -64,7 +96,6 @@ static void memreset(int controllers, const struct mem_controller *ctrl)
    }
 }
 
-
 static inline void activate_spd_rom(const struct mem_controller *ctrl)
 {
         /* nothing to do */
@@ -160,7 +191,7 @@ static void main(unsigned long bist)
                         || (id.coreid != 0)
 #endif
                 ) {
-                        stop_this_cpu(); 
+                        stop_this_cpu(); // it will stop all cores except core0 of cpu0
                 }
         }
 
@@ -176,7 +207,6 @@ static void main(unsigned long bist)
 #if CONFIG_LOGICAL_CPUS==1
         start_other_cores();
 #endif
-        // automatically set that for you, but you might meet tight space
         needs_reset |= ht_setup_chains_x();
         if (needs_reset) {
                 print_info("ht reset -\r\n");