From 128890f8a8ce0ff73045af519b007525c76397dc Mon Sep 17 00:00:00 2001
From: Venkatesh Srinivas <vsrinivas@ops101.org>
Date: Mon, 18 Nov 2019 06:51:09 +0000
Subject: [PATCH] [platform][tms570-launchpad] Skeleton of port to TI
 LaunchXL2-TMS57012

* Adds target tms570-launchpad, for TI TMS570 Launchpad Dev Kit
(https://www.ti.com/store/ti/en/p/product/?p=LAUNCHXL2-TMS57012)

* Adds CPU definitions for Cortex R4F (BE) CPU, implementing
  ARMv7-R ISA. Does not yet add definitions for ARMv7 arch entry
  functions.

* Board does not yet build - platform.c/uart.c are empty, no GIC
  entry points provided.
---
 arch/arm/include/arch/defines.h |  2 ++
 arch/arm/rules.mk               |  9 +++++++++
 arch/arm/toolchain.mk           |  7 +++++++
 platform/tms570/platform.c      |  0
 platform/tms570/rules.mk        | 29 +++++++++++++++++++++++++++++
 platform/tms570/uart.c          |  0
 project/tms570-launchpad.mk     | 12 ++++++++++++
 target/tms570/rules.mk          |  9 +++++++++
 8 files changed, 68 insertions(+)
 create mode 100644 platform/tms570/platform.c
 create mode 100644 platform/tms570/rules.mk
 create mode 100644 platform/tms570/uart.c
 create mode 100644 project/tms570-launchpad.mk
 create mode 100644 target/tms570/rules.mk

diff --git a/arch/arm/include/arch/defines.h b/arch/arm/include/arch/defines.h
index 04f686c1..2b0bb45d 100644
--- a/arch/arm/include/arch/defines.h
+++ b/arch/arm/include/arch/defines.h
@@ -33,6 +33,8 @@
 #define CACHE_LINE 32
 #elif ARM_CPU_CORTEX_A15
 #define CACHE_LINE 64
+#elif ARM_CPU_CORTEX_R4F
+#define CACHE_LINE 64
 #else
 #error unknown cpu
 #endif
diff --git a/arch/arm/rules.mk b/arch/arm/rules.mk
index 7827f8fd..ba8993fb 100644
--- a/arch/arm/rules.mk
+++ b/arch/arm/rules.mk
@@ -183,6 +183,15 @@ GLOBAL_DEFINES += \
 	ARM_CPU_ARM1136=1
 HANDLED_CORE := true
 endif
+ifeq ($(ARM_CPU),cortex-r4f)
+GLOBAL_DEFINES += \
+	ARM_CPU_CORTEX_R4F=1 \
+	ARM_ISA_ARMv7=1 \
+	ARM_WITH_VFP=1 \
+	ARM_WITH_THUMB=1
+	ENABLE_THUMB := true
+	HANDLED_CORE := true
+endif
 ifeq ($(ARM_CPU),armemu)
 # flavor of emulated cpu by the armemu project
 GLOBAL_DEFINES += \
diff --git a/arch/arm/toolchain.mk b/arch/arm/toolchain.mk
index 35b36276..b42e9c92 100644
--- a/arch/arm/toolchain.mk
+++ b/arch/arm/toolchain.mk
@@ -105,6 +105,13 @@ endif
 ifeq ($(ARM_CPU),arm1176jzf-s)
 ARCH_arm_COMPILEFLAGS += -mcpu=$(ARM_CPU)
 endif
+ifeq ($(ARM_CPU),cortex-r4f)
+ARCH_arm_COMPILEFLAGS += -march=armv7-r
+ARCH_arm_COMPILEFLAGS += -mcpu=$(ARM_CPU)
+ARCH_arm_COMPILEFLAGS += -mbig-endian
+ARCH_arm_COMPILEFLAGS += -mfpu=vfpv3-d16 -mfloat-abi=hard
+GLOBAL_MODULE_LDFLAGS += -EB
+endif
 ifeq ($(ARM_CPU),armemu)
 ARCH_arm_COMPILEFLAGS += -march=armv7-a
 endif
diff --git a/platform/tms570/platform.c b/platform/tms570/platform.c
new file mode 100644
index 00000000..e69de29b
diff --git a/platform/tms570/rules.mk b/platform/tms570/rules.mk
new file mode 100644
index 00000000..ddbceda5
--- /dev/null
+++ b/platform/tms570/rules.mk
@@ -0,0 +1,29 @@
+LOCAL_DIR := $(GET_LOCAL_DIR)
+
+MODULE := $(LOCAL_DIR)
+
+MODULE_DEPS += \
+    lib/cbuf \
+    lib/fdt \
+    dev/interrupt/arm_gic \
+    dev/timer/arm_generic \
+
+MODULE_SRCS += \
+	$(LOCAL_DIR)/platform.c \
+	$(LOCAL_DIR)/uart.c \
+
+ARCH := arm
+ARM_CPU := cortex-r4f
+MEMBASE := 0
+MEMSIZE := 0x80000000	# 2GB
+KERNEL_LOAD_OFFSET := 0x01080000
+LINKER_SCRIPT += \
+	$(BUILDDIR)/system-onesegment.ld
+
+MODULE := $(LOCAL_DIR)
+
+MODULE_DEPS += \
+		app/shell \
+
+
+include make/module.mk
diff --git a/platform/tms570/uart.c b/platform/tms570/uart.c
new file mode 100644
index 00000000..e69de29b
diff --git a/project/tms570-launchpad.mk b/project/tms570-launchpad.mk
new file mode 100644
index 00000000..04918d07
--- /dev/null
+++ b/project/tms570-launchpad.mk
@@ -0,0 +1,12 @@
+# main project for TI Hercules TMS570LS12x LaunchPad
+LOCAL_DIR := $(GET_LOCAL_DIR)
+
+TARGET := tms570
+
+MODULES += \
+	app/shell \
+	app/stringtests \
+	app/tests \
+	lib/cksum \
+	lib/debugcommands \
+
diff --git a/target/tms570/rules.mk b/target/tms570/rules.mk
new file mode 100644
index 00000000..2c3ca840
--- /dev/null
+++ b/target/tms570/rules.mk
@@ -0,0 +1,9 @@
+LOCAL_DIR := $(GET_LOCAL_DIR)
+
+GLOBAL_INCLUDES += \
+    $(LOCAL_DIR)/include
+
+PLATFORM := tms570
+
+#include make/module.mk
+