1 files changed, 111 insertions, 0 deletions
diff --git a/src/mainboard/tyan/s2892/failover.c b/src/mainboard/tyan/s2892/failover.c
new file mode 100644
index 0000000000..b8d21f1d93
--- /dev/null
+++ b/src/mainboard/tyan/s2892/failover.c
@@ -0,0 +1,111 @@
+#define ASSEMBLY 1
+#include <stdint.h>
+#include <device/pci_def.h>
+#include <device/pci_ids.h>
+#include <arch/io.h>
+#include <arch/romcc_io.h>
+#include <cpu/x86/lapic.h>
+#include "pc80/mc146818rtc_early.c"
+
+#include "southbridge/nvidia/ck804/ck804_enable_rom.c"
+#include "northbridge/amd/amdk8/early_ht.c"
+#include "cpu/x86/lapic/boot_cpu.c"
+#include "northbridge/amd/amdk8/reset_test.c"
+
+static void sio_setup(void)
+{
+        
+        unsigned value;
+	uint32_t dword;
+	uint8_t byte;
+
+        byte = pci_read_config32(PCI_DEV(0, CK804_DEVN_BASE+1 , 0), 0x7b);
+        byte |= 0x20; 
+        pci_write_config8(PCI_DEV(0, CK804_DEVN_BASE+1 , 0), 0x7b, byte);
+	
+	dword = pci_read_config32(PCI_DEV(0, CK804_DEVN_BASE+1 , 0), 0xa0);
+	dword |= (1<<0);  
+	pci_write_config32(PCI_DEV(0, CK804_DEVN_BASE+1 , 0), 0xa0, dword);
+
+
+}
+
+#if CONFIG_LOGICAL_CPUS==1
+#include "cpu/amd/dualcore/dualcore_id.c"
+#endif
+
+static unsigned long main(unsigned long bist)
+{
+#if CONFIG_LOGICAL_CPUS==1
+        struct node_core_id id;
+#else
+        unsigned nodeid;
+#endif
+        /* Make cerain my local apic is useable */
+        enable_lapic();
+
+#if CONFIG_LOGICAL_CPUS==1
+        id = get_node_core_id_x();
+        /* Is this a cpu only reset? */
+        if (cpu_init_detected(id.nodeid)) {
+#else
+        nodeid = lapicid();
+        /* Is this a cpu only reset? */
+        if (cpu_init_detected(nodeid)) {
+#endif
+		if (last_boot_normal()) {
+			goto normal_image;
+		} else {
+			goto cpu_reset;
+		}
+	}
+	
+	/* Is this a secondary cpu? */
+	if (!boot_cpu()) {
+		if (last_boot_normal()) {
+			goto normal_image;
+		} else {
+			goto fallback_image;
+		}
+	}
+
+	/* Nothing special needs to be done to find bus 0 */
+	/* Allow the HT devices to be found */
+	
+	enumerate_ht_chain();
+
+	sio_setup();
+
+	/* Setup the ck804 */
+	ck804_enable_rom();
+
+	/* Is this a deliberate reset by the bios */
+	if (bios_reset_detected() && last_boot_normal()) {
+		goto normal_image;
+	}
+	/* This is the primary cpu how should I boot? */
+	else if (do_normal_boot()) {
+		goto normal_image;
+	}
+	else {
+		goto fallback_image;
+	}
+ normal_image:
+	asm volatile ("jmp __normal_image" 
+		: /* outputs */ 
+		: "a" (bist) /* inputs */
+		: /* clobbers */
+		);
+ cpu_reset:
+#if 0
+	//CPU reset will reset memtroller ???
+	asm volatile ("jmp __cpu_reset" 
+		: /* outputs */ 
+		: "a"(bist) /* inputs */
+		: /* clobbers */
+		);
+#endif
+
+ fallback_image:
+	return bist;
+}