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authorPatrick Rudolph <patrick.rudolph@9elements.com>2018-06-28 13:58:36 +0200
committerPatrick Rudolph <siro@das-labor.org>2018-07-27 16:19:28 +0000
commit853bb4dc11f999d3f5637769da588fbd9446aba8 (patch)
treed068162e2ddc873fad576ac8c2080bec4a9e2401 /src/southbridge
parent7d7c631066591e900cfbf96e2485fcfc514b02bd (diff)
downloadcoreboot-853bb4dc11f999d3f5637769da588fbd9446aba8.tar.xz
sb/intel/common: Add functions to manipulate PMBASE
Add common functions to manipulate PMBASE IO window. TODO: * Use the new functions to manipulate register in PMBASE. * Get rid of duplicated get_pmbase() Change-Id: I3b454434ade560fb056b1fc0afe9541df93e14dd Signed-off-by: Patrick Rudolph <siro@das-labor.org> Reviewed-on: https://review.coreboot.org/27278 Reviewed-by: Felix Held <felix-coreboot@felixheld.de> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/southbridge')
-rw-r--r--src/southbridge/intel/common/Makefile.inc5
-rw-r--r--src/southbridge/intel/common/pmbase.c93
-rw-r--r--src/southbridge/intel/common/pmbase.h26
3 files changed, 124 insertions, 0 deletions
diff --git a/src/southbridge/intel/common/Makefile.inc b/src/southbridge/intel/common/Makefile.inc
index bf3a86e8ff..961b71bbd8 100644
--- a/src/southbridge/intel/common/Makefile.inc
+++ b/src/southbridge/intel/common/Makefile.inc
@@ -18,6 +18,11 @@ subdirs-y += firmware
ifeq ($(CONFIG_SOUTHBRIDGE_INTEL_COMMON),y)
+romstage-y += pmbase.c
+ramstage-y += pmbase.c
+postcar-y += pmbase.c
+smm-y += pmbase.c
+
romstage-$(CONFIG_USBDEBUG_IN_ROMSTAGE) += usb_debug.c
ramstage-$(CONFIG_USBDEBUG) += usb_debug.c
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);
+}
diff --git a/src/southbridge/intel/common/pmbase.h b/src/southbridge/intel/common/pmbase.h
new file mode 100644
index 0000000000..fdef8887b1
--- /dev/null
+++ b/src/southbridge/intel/common/pmbase.h
@@ -0,0 +1,26 @@
+/*
+ * 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>
+
+u16 lpc_get_pmbase(void);
+
+void write_pmbase32(const u8 addr, const u32 val);
+void write_pmbase16(const u8 addr, const u16 val);
+void write_pmbase8(const u8 addr, const u8 val);
+
+u32 read_pmbase32(const u8 addr);
+u16 read_pmbase16(const u8 addr);
+u8 read_pmbase8(const u8 addr);