[U-Boot] [RFC PATCH 2/2] Add vexpress_aemv8a_aarch32 variant

[Ryan Harkin]

The ARM AEMv8 FVP model can be run in Aarch64 or Aarch32 mode. Aarch32
support is enable per-CPU when launching the model, eg:

-C cluster0.cpu0.CONFIG64=0

This patch adds a new defconfig and some variant specific selections in
vexpress_armv8a.h.

This patch is co-authored with Soby Mathew <Soby.Mathew at arm.com>.

Signed-off-by: Ryan Harkin <ryan.harkin at linaro.org>
---
 arch/arm/Kconfig                          | 10 ++++++++++
 board/armltd/vexpress64/Kconfig           |  2 +-
 configs/vexpress_aemv8a_aarch32_defconfig | 30 ++++++++++++++++++++++++++++++
 include/configs/vexpress_aemv8a.h         | 28 ++++++++++++++++++++++++++--
 4 files changed, 67 insertions(+), 3 deletions(-)
 create mode 100644 configs/vexpress_aemv8a_aarch32_defconfig

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 6475a21..59e22aa 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -647,6 +647,16 @@ config TARGET_VEXPRESS64_BASE_FVP
 	select ARM64
 	select SEMIHOSTING
 
+config TARGET_VEXPRESS_AEMV8_AARCH32
+	bool "Support Versatile Express ARMv8a 32-bit FVP BASE model booting from DRAM"
+	select CPU_V7
+	select ARMV8_AARCH32
+	help
+	  This target is derived from TARGET_VEXPRESS64_BASE_FVP and over-rides
+	  the default config to allow the user to load the images directly into
+	  DRAM using model parameters rather than by using semi-hosting to load
+	  the files from the host filesystem.
+
 config TARGET_VEXPRESS64_BASE_FVP_DRAM
 	bool "Support Versatile Express ARMv8a FVP BASE model booting from DRAM"
 	select ARM64
diff --git a/board/armltd/vexpress64/Kconfig b/board/armltd/vexpress64/Kconfig
index e05f353..06c1ce1 100644
--- a/board/armltd/vexpress64/Kconfig
+++ b/board/armltd/vexpress64/Kconfig
@@ -1,4 +1,4 @@
-if TARGET_VEXPRESS64_BASE_FVP || TARGET_VEXPRESS64_JUNO || TARGET_VEXPRESS64_BASE_FVP_DRAM
+if TARGET_VEXPRESS64_BASE_FVP || TARGET_VEXPRESS64_JUNO || TARGET_VEXPRESS64_BASE_FVP_DRAM || TARGET_VEXPRESS_AEMV8_AARCH32
 
 config SYS_BOARD
 	default "vexpress64"
diff --git a/configs/vexpress_aemv8a_aarch32_defconfig b/configs/vexpress_aemv8a_aarch32_defconfig
new file mode 100644
index 0000000..109bae5
--- /dev/null
+++ b/configs/vexpress_aemv8a_aarch32_defconfig
@@ -0,0 +1,30 @@
+CONFIG_ARM=y
+CONFIG_TARGET_VEXPRESS_AEMV8_AARCH32=y
+CONFIG_SYS_MALLOC_F_LEN=0x2000
+CONFIG_IDENT_STRING=" vexpress_aemv8a"
+CONFIG_BOOTDELAY=1
+# CONFIG_DISPLAY_CPUINFO is not set
+# CONFIG_DISPLAY_BOARDINFO is not set
+CONFIG_HUSH_PARSER=y
+CONFIG_SYS_PROMPT="VExpress32# "
+# CONFIG_CMD_CONSOLE is not set
+# CONFIG_CMD_IMLS is not set
+# CONFIG_CMD_XIMG is not set
+# CONFIG_CMD_EDITENV is not set
+# CONFIG_CMD_ENV_EXISTS is not set
+CONFIG_CMD_MEMTEST=y
+# CONFIG_CMD_LOADS is not set
+CONFIG_CMD_ARMFLASH=y
+# CONFIG_CMD_FPGA is not set
+# CONFIG_CMD_ITEST is not set
+# CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_DHCP=y
+# CONFIG_CMD_NFS is not set
+CONFIG_CMD_MII=y
+CONFIG_CMD_PING=y
+CONFIG_CMD_CACHE=y
+# CONFIG_CMD_MISC is not set
+CONFIG_CMD_FAT=y
+CONFIG_DM=y
+CONFIG_DM_SERIAL=y
+CONFIG_OF_LIBFDT=y
diff --git a/include/configs/vexpress_aemv8a.h b/include/configs/vexpress_aemv8a.h
index c9841cd..5cab39a 100644
--- a/include/configs/vexpress_aemv8a.h
+++ b/include/configs/vexpress_aemv8a.h
@@ -16,12 +16,17 @@
 #endif
 
 #define CONFIG_REMAKE_ELF
-
 #define CONFIG_SUPPORT_RAW_INITRD
+#ifdef CONFIG_ARMV8_AARCH32
+#define CONFIG_SYS_HZ_CLOCK		24000000
+#define CONFIG_SYS_ARCH_TIMER
+#define CONFIG_SKIP_LOWLEVEL_INIT
+#endif
 
 /* Link Definitions */
 #if defined(CONFIG_TARGET_VEXPRESS64_BASE_FVP) || \
-	defined(CONFIG_TARGET_VEXPRESS64_BASE_FVP_DRAM)
+	defined(CONFIG_TARGET_VEXPRESS64_BASE_FVP_DRAM) || \
+	defined(CONFIG_TARGET_VEXPRESS_AEMV8_AARCH32)
 /* ATF loads u-boot here for BASE_FVP model */
 #define CONFIG_SYS_TEXT_BASE		0x88000000
 #define CONFIG_SYS_INIT_SP_ADDR         (CONFIG_SYS_SDRAM_BASE + 0x03f00000)
@@ -259,6 +264,25 @@
 #define CONFIG_BOOTCOMMAND	"booti $kernel_addr $initrd_addr $fdt_addr"
 
 
+#elif CONFIG_TARGET_VEXPRESS_AEMV8_AARCH32
+#define CONFIG_EXTRA_ENV_SETTINGS	\
+				"kernel_addr=0x80080000\0"	\
+				"initrd_addr=0x84000000\0"	\
+				"fdt_addr=0x82000000\0"		\
+				"fdt_high=0xffffffff\0"	\
+				"initrd_high=0xffffffff\0"
+
+#define CONFIG_BOOTARGS		"console=ttyAMA0 earlycon=pl011,"\
+				"0x1c090000 debug user_debug=31 "\
+				"systemd.log_target=null "\
+				"androidboot.hardware=fvpbase "\
+				"root=/dev/vda2 rw "\
+				"rootwait "\
+				"loglevel=9"
+
+#define CONFIG_BOOTCOMMAND	"bootm $kernel_addr $initrd_addr $fdt_addr"
+
+
 #endif
 
 /* Monitor Command Prompt */
-- 
1.9.1