1 files changed, 93 insertions, 0 deletions
diff --git a/src/southbridge/intel/common/pmbase.c b/src/southbridge/intel/common/pmbase.c
new file mode 100644
index 0000000000..360b63d9e4
--- /dev/null
+++ b/src/southbridge/intel/common/pmbase.c
@@ -0,0 +1,93 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2018 Patrick Rudolph <patrick.rudolph@9elements.com>
+ *
+ * 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.
+ */
+
+#include <stdint.h>
+#include <arch/io.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <arch/early_variables.h>
+#include <assert.h>
+
+#include "pmbase.h"
+
+/* LPC PM Base Address Register */
+#define PMBASE		0x40
+#define PMSIZE		0x80
+
+/* PCI Configuration Space (D31:F0): LPC */
+#if defined(__SIMPLE_DEVICE__)
+#define PCH_LPC_DEV	PCI_DEV(0, 0x1f, 0)
+#else
+#define PCH_LPC_DEV	dev_find_slot(0, PCI_DEVFN(0x1f, 0))
+#endif
+
+u16 lpc_get_pmbase(void)
+{
+#if defined(__SMM__)
+	/* Don't assume PMBASE is still the same */
+	return pci_read_config16(PCH_LPC_DEV, PMBASE) & 0xfffc;
+#else
+	static u16 pmbase CAR_GLOBAL;
+
+	if (pmbase)
+		return pmbase;
+
+	pmbase = pci_read_config16(PCH_LPC_DEV, PMBASE) & 0xfffc;
+
+	return pmbase;
+#endif
+}
+
+void write_pmbase32(const u8 addr, const u32 val)
+{
+	ASSERT(addr <= (PMSIZE - sizeof(u32)));
+
+	outl(val, lpc_get_pmbase() + addr);
+}
+
+void write_pmbase16(const u8 addr, const u16 val)
+{
+	ASSERT(addr <= (PMSIZE - sizeof(u16)));
+
+	outw(val, lpc_get_pmbase() + addr);
+}
+
+void write_pmbase8(const u8 addr, const u8 val)
+{
+	ASSERT(addr <= (PMSIZE - sizeof(u8)));
+
+	outb(val, lpc_get_pmbase() + addr);
+}
+
+u32 read_pmbase32(const u8 addr)
+{
+	ASSERT(addr <= (PMSIZE - sizeof(u32)));
+
+	return inl(lpc_get_pmbase() + addr);
+}
+
+u16 read_pmbase16(const u8 addr)
+{
+	ASSERT(addr <= (PMSIZE - sizeof(u16)));
+
+	return inw(lpc_get_pmbase() + addr);
+}
+
+u8 read_pmbase8(const u8 addr)
+{
+	ASSERT(addr <= (PMSIZE - sizeof(u8)));
+
+	return inb(lpc_get_pmbase() + addr);
+}