merging changes from OPAE branch making this branch

driver/sw/vx_utils.cpp

@@ -0,0 +1,91 @@
+#include <iostream>
+#include <fstream>
+#include <cstring>
+#include <vortex.h>
+
+int vx_upload_kernel_bytes(vx_device_h device, const void* content, size_t size) {
+  int err = 0;
+
+  if (NULL == content || 0 == size)
+    return -1;
+
+  static constexpr uint32_t TRANSFER_SIZE = 4096;
+
+  // allocate device buffer
+  vx_buffer_h buffer;
+  err = vx_alloc_shared_mem(device, TRANSFER_SIZE, &buffer);
+  if (err != 0)
+    return -1; 
+
+  // get buffer address
+  auto buf_ptr = (uint8_t*)vx_host_ptr(buffer);
+
+ #if defined(USE_SIMX)
+  // default startup routine
+  ((uint32_t*)buf_ptr)[0] = 0xf1401073;
+  ((uint32_t*)buf_ptr)[1] = 0xf1401073;      
+  ((uint32_t*)buf_ptr)[2] = 0x30101073;
+  ((uint32_t*)buf_ptr)[3] = 0x800000b7;
+  ((uint32_t*)buf_ptr)[4] = 0x000080e7;
+  err = vx_copy_to_dev(buffer, 0, 5 * 4, 0);
+  if (err != 0) {
+    vx_buf_release(buffer);
+    return err;
+  }
+
+  // newlib io simulator trap
+  ((uint32_t*)buf_ptr)[0] = 0x00008067;
+  err = vx_copy_to_dev(buffer, 0x70000000, 4, 0);
+  if (err != 0) {
+    vx_buf_release(buffer);
+    return err;
+  }
+#endif
+
+  //
+  // upload content
+  //
+
+  size_t offset = 0;
+  while (offset < size) {
+    auto chunk_size = std::min<size_t>(TRANSFER_SIZE, size - offset);
+    std::memcpy(buf_ptr, (uint8_t*)content + offset, chunk_size);
+    err = vx_copy_to_dev(buffer, VX_KERNEL_BASE_ADDR + offset, chunk_size, 0);
+    if (err != 0) {
+      vx_buf_release(buffer);
+      return err;
+    }
+    offset += chunk_size;
+  }
+
+  vx_buf_release(buffer);
+
+  return 0;
+}
+
+int vx_upload_kernel_file(vx_device_h device, const char* filename) {
+  std::ifstream ifs(filename);
+  if (!ifs) {
+    std::cout << "error: " << filename << " not found" << std::endl;
+    return -1;
+  }
+
+  // get length of file:
+  ifs.seekg(0, ifs.end);
+  auto size = ifs.tellg();
+  ifs.seekg(0, ifs.beg);
+
+  // allocate buffer 
+  auto content = new char [size];  
+
+  // read file content
+  ifs.read(content, size);
+
+  // upload
+  int err = vx_upload_kernel_bytes(device, content, size);
+
+  // release buffer
+  delete[] content;
+
+  return err;
+}