Add initial support for Shakti platform

.gitignore

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+*.pyc

.travis.yml

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+language: python
+python:
+  - "2.7"
+  - "3.6"
+
+env:
+  - PLATFORMIO_PROJECT_DIR=examples/shakti-sdk_gpio-keypad
+  - PLATFORMIO_PROJECT_DIR=examples/shakti-sdk_i2c-lm75
+  - PLATFORMIO_PROJECT_DIR=examples/shakti-sdk_uart-hello
+
+install:
+  - pip install -U https://github.com/platformio/platformio/archive/develop.zip
+  - platformio platform install file://.
+
+script:
+  - platformio run -d $PLATFORMIO_PROJECT_DIR
+
+notifications:
+  email: false
+
+  slack:
+    rooms:
+      secure: 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
+    on_failure: always
+    on_success: change

README.md

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+# Shakti: development platform for [PlatformIO](http://platformio.org)
+[![Build Status](https://travis-ci.org/platformio/platform-shakti.svg?branch=develop)](https://travis-ci.org/platformio/platform-shakti)
+[![Build status](https://ci.appveyor.com/api/projects/status/pm59mq539ttp51hd/branch/develop?svg=true)](https://ci.appveyor.com/project/ivankravets/platform-shakti/branch/develop)
+
+Shakti is an open-source initiative by the RISE group at IIT-Madras, which is not only building open source, production grade processors, but also associated components like interconnect fabrics, verification tools, storage controllers, peripheral IPs and SOC tools.  
+
+* [Home](http://platformio.org/platforms/shakti) (home page in PlatformIO Platform Registry)
+* [Documentation](http://docs.platformio.org/page/platforms/shakti.html) (advanced usage, packages, boards, frameworks, etc.)
+
+# Usage
+
+1. [Install PlatformIO](http://platformio.org)
+2. Create PlatformIO project and configure a platform option in [platformio.ini](http://docs.platformio.org/page/projectconf.html) file:
+
+## Stable version
+
+```ini
+[env:stable]
+platform = shakti
+board = ...
+...
+```
+
+## Development version
+
+```ini
+[env:development]
+platform = https://github.com/platformio/platform-shakti.git
+board = ...
+...
+```
+
+# Configuration
+
+Please navigate to [documentation](http://docs.platformio.org/page/platforms/shakti.html).

appveyor.yml

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+build: off
+environment:
+
+  matrix:
+    - PLATFORMIO_PROJECT_DIR: "examples/shakti-sdk_gpio-keypad"
+    - PLATFORMIO_PROJECT_DIR: "examples/shakti-sdk_i2c-lm75"
+    - PLATFORMIO_PROJECT_DIR: "examples/shakti-sdk_uart-hello"
+
+install:
+- cmd: git submodule update --init --recursive
+- cmd: SET PATH=%PATH%;C:\Python27\Scripts
+- cmd: pip install -U https://github.com/platformio/platformio/archive/develop.zip
+- cmd: platformio platform install file://.
+
+test_script:
+- cmd: platformio run -d %PLATFORMIO_PROJECT_DIR%
+
+notifications:
+  - provider: Slack
+    incoming_webhook:
+      secure: E9H0SU0Ju7WLDvgxsV8cs3J62T3nTTX7QkEjsczN0Sto/c9hWkVfhc5gGWUkxhlD975cokHByKGJIdwYwCewqOI+7BrcT8U+nlga4Uau7J8=
+    on_build_success: false
+    on_build_failure: true
+    on_build_status_changed: true

boards/artix7_100t.json

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+{
+  "build": {
+    "extra_flags": "-D ARTIX7_100T",
+    "f_cpu": "1500000000L",
+    "hwids": [
+      [
+        "0x0403",
+        "0x6010"
+      ]
+    ],
+    "ldscript": "link.ld",
+    "mabi": "lp64",
+    "march": "rv64imac",
+    "mcmodel": "medany",
+    "mcu": "e51"
+  },
+  "debug": {
+    "init_cmds": [
+      "define pio_reset_halt_target",
+      "   monitor halt",
+      "end",
+      "define pio_reset_target",
+      "   pio_reset_halt_target",
+      "end",
+      "target extended-remote $DEBUG_PORT",
+      "$INIT_BREAK",
+      "$LOAD_CMDS",
+      "monitor init",
+      "pio_reset_halt_target"
+    ]
+  },
+  "frameworks": [
+    "shakti-sdk"
+  ],
+  "name": "Arty A7-100: Artix-7 FPGA Development Board",
+  "upload": {
+    "maximum_ram_size": 268435456,
+    "maximum_size": 16777216,
+    "protocol": "jlink",
+    "protocols": [
+      "ftdi",
+      "jlink"
+    ]
+  },
+  "url": "https://www.xilinx.com/products/boards-and-kits/1-w51quh.html",
+  "vendor": "Xilinx"
+}

boards/artix7_35t.json

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+{
+  "build": {
+    "extra_flags": "-D ARTIX7_35T",
+    "f_cpu": "320000000L",
+    "hwids": [
+      [
+        "0x0403",
+        "0x6010"
+      ]
+    ],
+    "ldscript": "link.ld",
+    "mabi": "ilp32",
+    "march": "rv32imac",
+    "mcmodel": "medany",
+    "mcu": "e31"
+  },
+  "debug": {
+    "jlink_device": "FE310",
+    "init_cmds": [
+      "define pio_reset_halt_target",
+      "   monitor halt",
+      "end",
+      "define pio_reset_target",
+      "   pio_reset_halt_target",
+      "end",
+      "target extended-remote $DEBUG_PORT",
+      "$INIT_BREAK",
+      "$LOAD_CMDS",
+      "monitor init",
+      "pio_reset_halt_target"
+    ],
+    "svd_path": "FE310.svd",
+    "onboard_tools": [
+      "ftdi"
+    ]
+  },
+  "frameworks": [
+    "shakti-sdk"
+  ],
+  "name": "Artix-7 35T Arty FPGA Evaluation Kit",
+  "upload": {
+    "maximum_ram_size": 268435456,
+    "maximum_size": 16777216,
+    "protocol": "ftdi",
+    "protocols": [
+      "ftdi",
+      "jlink"
+    ]
+  },
+  "url": "https://www.xilinx.com/products/boards-and-kits/arty.html",
+  "vendor": "Xilinx"
+}

builder/frameworks/_bare.py

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+# Copyright 2014-present PlatformIO <contact@platformio.org>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+#
+# Default flags for bare-metal programming (without any framework layers)
+#
+
+from SCons.Script import Import
+
+Import("env")
+
+board_config = env.BoardConfig()
+
+env.Append(
+    CCFLAGS=[
+        "-Wall",  # show warnings
+        "-march=%s" % board_config.get("build.march"),
+        "-mabi=%s" % board_config.get("build.mabi"),
+        "-mcmodel=%s" % board_config.get("build.mcmodel")
+    ],
+
+    LINKFLAGS=[
+        "-nostartfiles",
+        "-march=%s" % board_config.get("build.march"),
+        "-mabi=%s" % board_config.get("build.mabi"),
+        "-mcmodel=%s" % board_config.get("build.mcmodel")
+    ],
+
+    LIBS=["c", "m", "gcc"]
+)
+
+# copy CCFLAGS to ASFLAGS (-x assembler-with-cpp mode)
+env.Append(ASFLAGS=env.get("CCFLAGS", [])[:])

builder/frameworks/shakti-sdk.py

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+# Copyright 2019-present PlatformIO <contact@platformio.org>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+Shakti SDK
+
+Open Source Software for Developing on the Shakti Platform
+
+https://gitlab.com/shaktiproject/software/shakti-sdk
+"""
+
+from shutil import copyfile
+from os import makedirs, listdir
+from os.path import isdir, join
+
+from SCons.Script import DefaultEnvironment
+
+env = DefaultEnvironment()
+
+FRAMEWORK_DIR = env.PioPlatform().get_package_dir("framework-shakti-sdk")
+assert FRAMEWORK_DIR and isdir(FRAMEWORK_DIR)
+
+
+def is_valid_target(target):
+    target_dir = join(FRAMEWORK_DIR, "bsp", "third_party", target)
+    return isdir(target_dir)
+
+
+env.SConscript("_bare.py", exports="env")
+
+target = env.subst("$BOARD")
+
+env.Append(
+    ASFLAGS=[
+        ("-D__ASSEMBLY__=1")
+    ],
+
+    CFLAGS=[
+        "-std=gnu99"
+    ],
+
+    CCFLAGS=[
+        "-fno-common",
+        "-fno-builtin-printf"
+    ],
+
+    CPPPATH=[
+        join(FRAMEWORK_DIR, "bsp", "include"),
+        join(FRAMEWORK_DIR, "bsp", "third_party", target)
+    ],
+
+    LIBPATH=[
+        join(FRAMEWORK_DIR, "bsp", "third_party", target)
+    ]
+)
+
+if not is_valid_target(target):
+    print ("Could not find BSP package for %s" % target)
+    env.Exit(1)
+
+#
+# Target: Build core BSP libraries
+#
+
+unsupported_drivers = ("plic", "timer")
+
+libs = []
+
+for driver in listdir(join(FRAMEWORK_DIR, "bsp", "drivers")):
+    if driver in unsupported_drivers:
+        continue
+
+    libs.append(
+        env.BuildLibrary(
+            join("$BUILD_DIR", "bsp", "drivers", driver),
+            join(FRAMEWORK_DIR, "bsp", "drivers", driver))
+    )
+
+libs.append(
+    env.BuildLibrary(
+        join("$BUILD_DIR", "bsp", "libwrap"),
+        join(FRAMEWORK_DIR, "bsp", "libwrap"))
+)
+
+libs.append(
+    env.BuildLibrary(
+        join("$BUILD_DIR", "bsp", "include"),
+        join(FRAMEWORK_DIR, "bsp", "include"))
+)
+
+libs.append(
+    env.BuildLibrary(
+        join("$BUILD_DIR", "bsp", "third_party", target),
+        join(FRAMEWORK_DIR, "bsp", "third_party", target))
+)
+
+env.Prepend(LIBS=libs)