From 1f12772d19b163f402e14cfa21166c205132f9a8 Mon Sep 17 00:00:00 2001
From: Arthur Heymans <arthur@aheymans.xyz>
Date: Tue, 4 Jun 2019 09:46:36 +0200
Subject: sb/intel/ibexpeak: Copy the sandybridge bootblock.c file
This allows to port C_ENVIRONMENT_BOOTBLOCK to sandybridge separately
from nehalem.
Change-Id: If3c6619cf22d1e2995eb19823b0f3f969d252b3b
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33188
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Nico Huber <nico.h@gmx.de>
---
src/southbridge/intel/ibexpeak/Kconfig | 2 +-
src/southbridge/intel/ibexpeak/bootblock.c | 77 ++++++++++++++++++++++++++++++
2 files changed, 78 insertions(+), 1 deletion(-)
create mode 100644 src/southbridge/intel/ibexpeak/bootblock.c
(limited to 'src')
diff --git a/src/southbridge/intel/ibexpeak/Kconfig b/src/southbridge/intel/ibexpeak/Kconfig
index 85c89799e0..00eb413d1e 100644
--- a/src/southbridge/intel/ibexpeak/Kconfig
+++ b/src/southbridge/intel/ibexpeak/Kconfig
@@ -53,7 +53,7 @@ config DRAM_RESET_GATE_GPIO
config BOOTBLOCK_SOUTHBRIDGE_INIT
string
- default "southbridge/intel/bd82x6x/bootblock.c"
+ default "southbridge/intel/ibexpeak/bootblock.c"
config SERIRQ_CONTINUOUS_MODE
bool
diff --git a/src/southbridge/intel/ibexpeak/bootblock.c b/src/southbridge/intel/ibexpeak/bootblock.c
new file mode 100644
index 0000000000..0086fe3281
--- /dev/null
+++ b/src/southbridge/intel/ibexpeak/bootblock.c
@@ -0,0 +1,77 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011 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.
+ */
+
+#include <device/pci_ops.h>
+#include "pch.h"
+
+/*
+ * Enable Prefetching and Caching.
+ */
+static void enable_spi_prefetch(void)
+{
+ u8 reg8;
+ pci_devfn_t dev = PCH_LPC_DEV;
+
+ reg8 = pci_read_config8(dev, BIOS_CNTL);
+ reg8 &= ~(3 << 2);
+ reg8 |= (2 << 2); /* Prefetching and Caching Enabled */
+ pci_write_config8(dev, BIOS_CNTL, reg8);
+}
+
+static void enable_port80_on_lpc(void)
+{
+ pci_devfn_t dev = PCH_LPC_DEV;
+
+ /* Enable port 80 POST on LPC */
+ pci_write_config32(dev, RCBA, (uintptr_t)DEFAULT_RCBA | 1);
+#if 0
+ RCBA32(GCS) &= (~0x04);
+#else
+ volatile u32 *gcs = (volatile u32 *)(DEFAULT_RCBA + GCS);
+ u32 reg32 = *gcs;
+ reg32 = reg32 & ~0x04;
+ *gcs = reg32;
+#endif
+}
+
+static void set_spi_speed(void)
+{
+ u32 fdod;
+ u8 ssfc;
+
+ /* Observe SPI Descriptor Component Section 0 */
+ RCBA32(0x38b0) = 0x1000;
+
+ /* Extract the Write/Erase SPI Frequency from descriptor */
+ fdod = RCBA32(0x38b4);
+ fdod >>= 24;
+ fdod &= 7;
+
+ /* Set Software Sequence frequency to match */
+ ssfc = RCBA8(0x3893);
+ ssfc &= ~7;
+ ssfc |= fdod;
+ RCBA8(0x3893) = ssfc;
+}
+
+static void bootblock_southbridge_init(void)
+{
+ enable_spi_prefetch();
+ enable_port80_on_lpc();
+ set_spi_speed();
+
+ /* Enable upper 128bytes of CMOS */
+ RCBA32(RC) = (1 << 2);
+}
--
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