LynxPoint: Move RCBA helper function to its own file

So it can get used in both romstage and ramstage.

Change-Id: Ief9eaafdd91df2a7b668de1a9b83aea3af3ff894
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/2802
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

1 files changed, 74 insertions, 0 deletions

diff --git a/src/southbridge/intel/lynxpoint/rcba.c b/src/southbridge/intel/lynxpoint/rcba.c
new file mode 100644
index 0000000000..d41aa8686e
--- /dev/null
+++ b/src/southbridge/intel/lynxpoint/rcba.c
@@ -0,0 +1,74 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2013 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+
+#include <console/console.h>
+#include <device/pci_def.h>
+#ifdef __PRE_RAM__
+#include <arch/io.h>
+#include <arch/romcc_io.h>
+#else
+#include <device/device.h>
+#include <device/pci.h>
+#endif
+#include "pch.h"
+
+void pch_config_rcba(const struct rcba_config_instruction *rcba_config)
+{
+	const struct rcba_config_instruction *rc;
+	u32 value;
+
+	rc = rcba_config;
+	while (rc->command != RCBA_COMMAND_END)
+	{
+		if ((rc->command & RCBA_REG_SIZE_MASK) == RCBA_REG_SIZE_16) {
+			switch (rc->command & RCBA_COMMAND_MASK) {
+			case RCBA_COMMAND_SET:
+				RCBA16(rc->reg) = (u16)rc->or_value;
+				break;
+			case RCBA_COMMAND_READ:
+				(void)RCBA16(rc->reg);
+				break;
+			case RCBA_COMMAND_RMW:
+				value = RCBA16(rc->reg);
+				value &= rc->mask;
+				value |= rc->or_value;
+				RCBA16(rc->reg) = (u16)value;
+				break;
+			}
+		} else {
+			switch (rc->command & RCBA_COMMAND_MASK) {
+			case RCBA_COMMAND_SET:
+				RCBA32(rc->reg) = rc->or_value;
+				break;
+			case RCBA_COMMAND_READ:
+				(void)RCBA32(rc->reg);
+				break;
+			case RCBA_COMMAND_RMW:
+				value = RCBA32(rc->reg);
+				value &= rc->mask;
+				value |= rc->or_value;
+				RCBA32(rc->reg) = value;
+				break;
+			}
+		}
+		rc++;
+	}
+}
+