patches from Yh Lu. Tested and working on HDAMA

[coreboot.git] / src / cpu / k8 / cpufixup.c

diff --git a/src/cpu/k8/cpufixup.c b/src/cpu/k8/cpufixup.c
index 4976bee57897fd04d5f9817b7d13be19f8f448fc..c9979c180b626da6f6fb82770f066c6fd6f558c1 100644 (file)
--- a/src/cpu/k8/cpufixup.c
+++ b/src/cpu/k8/cpufixup.c
@@ -32,15 +32,28 @@ void k8_cpufixup(struct mem_range *mem)
                mmio_basek = tomk;
        }
 
-       /* Setup TOP_MEM */
-       msr.hi = mmio_basek >> 22;
-       msr.lo = mmio_basek << 10;
-       wrmsr(TOP_MEM, msr);
+#if 1
+        /* Report the amount of memory. */
+        print_debug("cpufixup RAM: 0x");
+        print_debug_hex32(tomk);
+        print_debug(" KB\r\n");
+#endif
+
+        /* Now set top of memory */
+        msr.lo = (tomk & 0x003fffff) << 10;
+        msr.hi = (tomk & 0xffc00000) >> 22;
+        wrmsr(TOP_MEM2, msr);
+
+        /* Leave a 64M hole between TOP_MEM and TOP_MEM2
+         * so I can see my rom chip and other I/O devices.
+         */
+        if (tomk >= 0x003f0000) {
+                tomk = 0x3f0000;
+        } //    tom_k = 0x3c0000;
+        msr.lo = (tomk & 0x003fffff) << 10;
+        msr.hi = (tomk & 0xffc00000) >> 22;
+        wrmsr(TOP_MEM, msr);
 
-       /* Setup TOP_MEM2 */
-       msr.hi = tomk >> 22;
-       msr.lo = tomk << 10;
-       wrmsr(TOP_MEM2, msr);
 
        /* zero the IORR's before we enable to prevent
         * undefined side effects.