k8 raminit: add workaround for erratum #181 on non-fam-f

Disable DRAM controller on non-fam-f CPUs not using fam-f register layout.

Change-Id: I2cc87857452555011d69bfebe9f9c4c17cef8f6c
Signed-off-by: Florian Zumbiehl <florz@florz.de>
Reviewed-on: http://review.coreboot.org/448
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marcj303@gmail.com>

diff --git a/src/cpu/amd/model_fxx/fidvid.c b/src/cpu/amd/model_fxx/fidvid.c
index 6395a1e1c65a239904b6ec5cca6f8545600e4626..06ff6366593e200a55f68912061b3179fb0c4da2 100644 (file)
--- a/src/cpu/amd/model_fxx/fidvid.c
+++ b/src/cpu/amd/model_fxx/fidvid.c
@@ -45,10 +45,19 @@ static void enable_fid_change(void)
                pci_write_config32(PCI_DEV(0, 0x18 + i, 3), 0xd4, dword);
 
                /* disable the DRAM interface at first, it will be enabled
-                * by raminit again */
+                * by raminit again (see also erratum #181) */
+#if CONFIG_K8_REV_F_SUPPORT
                dword = pci_read_config32(PCI_DEV(0, 0x18 + i, 2), 0x94);
                dword |= (1 << 14);
                pci_write_config32(PCI_DEV(0, 0x18 + i, 2), 0x94, dword);
+#else
+               dword = pci_read_config32(PCI_DEV(0, 0x18 + i, 2), 0x90);
+               dword |= (1 << 24);
+               pci_write_config32(PCI_DEV(0, 0x18 + i, 2), 0x90, dword);
+               dword = pci_read_config32(PCI_DEV(0, 0x18 + i, 2), 0x94);
+               dword |= (1 << 25);
+               pci_write_config32(PCI_DEV(0, 0x18 + i, 2), 0x94, dword);
+#endif
 
                dword = 0x23070700;     /* enable FID/VID change */
 //              dword = 0x00070000; /* enable FID/VID change */