ARM: tegra: add core Tegra186 support

This adds the bare minimum code to support Tegra186, with UART and eMMC
working.

The empty gpio.h is required because <asm/gpio.h> includes it. A future
cleanup round may be able to solve this for all Tegra generations at once.

mach-tegra/Makefile is adjusted not to compile anything for Tegra186, but
instead to defer everything to mach-tegra/tegra186/Makefile. This allows
the SoC code to pick-and-choose which of the C files in the "common"
mach-tegra/ directory to compile in based on the SoC's needs. Most of the
code is not valid for Tegra186, and this approach removes the need for
mach-tegra/Makefile to contain many SoC-specific ifdefs. This approach
may be applied to all other Tegra SoCs in a future cleanup round.

board186.c is introduced to replace board.c and board2.c. These files
currently contain a slew of SoC- and board-specific code that is not
valid for Tegra186. This approach avoids adding yet more ifdefs to those
files. A future cleanup round may refactor most of board*.c into board-/
SoC-specific functions files thus allowing the top-level functions like
board_init_early_f to be shared again.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>

1 files changed, 71 insertions, 0 deletions

diff --git a/include/configs/tegra186-common.h b/include/configs/tegra186-common.h
new file mode 100644
index 0000000000..aa7b9d038a
--- /dev/null
+++ b/include/configs/tegra186-common.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright 2013-2016, NVIDIA CORPORATION.
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#ifndef _TEGRA186_COMMON_H_
+#define _TEGRA186_COMMON_H_
+
+#include "tegra-common.h"
+
+/* Cortex-A57 uses a cache line size of 64 bytes */
+#define CONFIG_SYS_CACHELINE_SIZE	64
+
+/*
+ * NS16550 Configuration
+ */
+#define V_NS16550_CLK		408000000	/* 408MHz (pllp_out0) */
+
+/*
+ * Miscellaneous configurable options
+ */
+#define CONFIG_STACKBASE	0x82800000	/* 40MB */
+
+/*-----------------------------------------------------------------------
+ * Physical Memory Map
+ */
+
+#define CONFIG_SYS_TEXT_BASE	0x80080000
+
+/* Generic Interrupt Controller */
+#define CONFIG_GICV2
+
+/*
+ * Memory layout for where various images get loaded by boot scripts:
+ *
+ * scriptaddr can be pretty much anywhere that doesn't conflict with something
+ *   else. Put it above BOOTMAPSZ to eliminate conflicts.
+ *
+ * pxefile_addr_r can be pretty much anywhere that doesn't conflict with
+ *   something else. Put it above BOOTMAPSZ to eliminate conflicts.
+ *
+ * kernel_addr_r must be within the first 128M of RAM in order for the
+ *   kernel's CONFIG_AUTO_ZRELADDR option to work. Since the kernel will
+ *   decompress itself to 0x8000 after the start of RAM, kernel_addr_r
+ *   should not overlap that area, or the kernel will have to copy itself
+ *   somewhere else before decompression. Similarly, the address of any other
+ *   data passed to the kernel shouldn't overlap the start of RAM. Pushing
+ *   this up to 16M allows for a sizable kernel to be decompressed below the
+ *   compressed load address.
+ *
+ * fdt_addr_r simply shouldn't overlap anything else. Choosing 32M allows for
+ *   the compressed kernel to be up to 16M too.
+ *
+ * ramdisk_addr_r simply shouldn't overlap anything else. Choosing 33M allows
+ *   for the FDT/DTB to be up to 1M, which is hopefully plenty.
+ */
+#define CONFIG_LOADADDR 0x80080000
+#define MEM_LAYOUT_ENV_SETTINGS \
+	"scriptaddr=0x90000000\0" \
+	"pxefile_addr_r=0x90100000\0" \
+	"kernel_addr_r=" __stringify(CONFIG_LOADADDR) "\0" \
+	"fdt_addr_r=0x82000000\0" \
+	"ramdisk_addr_r=0x82100000\0"
+
+/* Defines for SPL */
+#define CONFIG_SPL_TEXT_BASE		0x80108000
+#define CONFIG_SYS_SPL_MALLOC_START	0x80090000
+#define CONFIG_SPL_STACK		0x800ffffc
+
+#endif