add scripts to build linux

riscv_custom/riscv_custom.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#ifdef __riscv
+
+#define riscv_roi_begin() asm volatile("csrwi 0x801, 1")
+#define riscv_roi_end() asm volatile("csrwi 0x801, 0")
+#define riscv_terminate() asm volatile("csrwi 0x800, 0")
+
+#else
+
+#define riscv_roi_begin()
+#define riscv_roi_end()
+#define riscv_terminate()
+
+#endif

riscv_custom/terminate/.gitignore

@@ -0,0 +1,2 @@
+terminate
+terminate.dump

riscv_custom/terminate/Makefile

@@ -0,0 +1,6 @@
+PREFIX = riscv64-unknown-linux-gnu
+TARGET = terminate
+
+all:
+	$(PREFIX)-g++ -I.. -static main.cpp -o $(TARGET)
+	$(PREFIX)-objdump -d $(TARGET) > $(TARGET).dump

riscv_custom/terminate/main.cpp

@@ -0,0 +1,7 @@
+#include "riscv_custom.h"
+
+int main() {
+    riscv_terminate();
+    while(1);
+    return 0;
+}

tools/build-busybox.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+set -e
+
+if [ $# -ne 0 ]; then
+    JOBS=$1
+else
+    JOBS=1
+fi
+
+CURDIR=`pwd`
+
+cd RV64G
+rm -rf busybox*
+wget https://busybox.net/downloads/busybox-1.21.1.tar.bz2
+tar -xf busybox-1.21.1.tar.bz2
+cd busybox-1.21.1
+cp $CURDIR/configs/busybox_config .config
+make -j$JOBS
+
+cd $CURDIR
+echo "busybox compiled successfully"

tools/build-linux.py

@@ -0,0 +1,61 @@
+#!/usr/bin/python
+
+import os
+import stat
+import shutil
+import argparse
+import subprocess
+
+parser = argparse.ArgumentParser()
+parser.add_argument('--testdir', dest = 'test_dir',
+                    required = False, default = '')
+parser.add_argument('--jobs', dest = 'jobs', required = False, default = 1)
+args = parser.parse_args()
+
+root = os.path.join(os.environ['RISCY_HOME'], 'tools')
+linux_dir = os.path.join(root, 'riscv-linux')
+config_dir = os.path.join(root, 'configs')
+build_dir = os.environ['RISCY_TOOLS']
+test_dir = '' if args.test_dir == '' else os.path.abspath(args.test_dir)
+
+# copy initramfs.txt and .config
+shutil.copy(os.path.join(config_dir, 'linux_config'),
+            os.path.join(linux_dir, '.config'))
+shutil.copy(os.path.join(config_dir, 'initramfs.txt'), linux_dir)
+
+# append to initramfs.txt with contents in test folder
+if test_dir != '':
+    with open(os.path.join(linux_dir, 'initramfs.txt'), 'a') as fp:
+        def writeTree(ramfs_dir, src_dir):
+            for f in os.listdir(src_dir):
+                ramfs_path = os.path.join(ramfs_dir, f)
+                src_path = os.path.join(src_dir, f)
+                mode = os.stat(src_path).st_mode
+                perm = oct(stat.S_IMODE(mode))[-3:]
+                if stat.S_ISDIR(mode):
+                    fp.write('dir {} {} 0 0\n'.format(ramfs_path, perm))
+                    writeTree(ramfs_path, src_path)
+                elif stat.S_ISREG(mode):
+                    fp.write('file {} {} {} 0 0\n'.format(ramfs_path,
+                                                        src_path,
+                                                        perm))
+                else:
+                    raise Exception('unknown file type ' + src_path)
+        writeTree('/test', test_dir)
+
+# compile vmlinux
+cmd = 'cd {}; make ARCH=riscv -j{}'.format(linux_dir, args.jobs)
+print 'Running: {}'.format(cmd)
+subprocess.check_call(cmd, shell = True)
+
+# compile bbl
+cmd = ('cd {}; '.format(build_dir) +
+       'rm -rf build-pk; mkdir -p build-pk; cd build-pk; ' +
+       '../../riscv-pk/configure ' +
+       '--prefix={} '.format(build_dir) +
+       '--host=riscv64-unknown-linux-gnu ' +
+       '--with-payload={}; '.format(os.path.join(linux_dir, 'vmlinux')) +
+       'make -j{}; make install'.format(args.jobs))
+print 'Running: {}'.format(cmd)
+subprocess.check_call(cmd, shell = True)
+