Use env variable to determine the ddr offset for emulation device (#9523)

* use env variable to determine the ddr offset for emulation device

Signed-off-by: Sri Latha Ayyannagari <SriLatha.Ayyannagari@amd.com>

* Fix comments

Signed-off-by: Sri Latha Ayyannagari <SriLatha.Ayyannagari@amd.com>

* Fix comments

Signed-off-by: Sri Latha Ayyannagari <SriLatha.Ayyannagari@amd.com>

* fix windows build failure

Signed-off-by: Sri Latha Ayyannagari <SriLatha.Ayyannagari@amd.com>

---------

Signed-off-by: Sri Latha Ayyannagari <SriLatha.Ayyannagari@amd.com>

Author: sayyanna

src/runtime_src/core/common/api/xrt_module.cpp

@@ -194,6 +194,19 @@ struct patcher
     return section_name_array[static_cast<int>(bt)];
   }
 
+  inline static uint64_t get_ddr_aie_addr_offset()
+  {
+    // on npu3 emulation platform, there is no ddr offset needed for AIE shim tile
+    constexpr uint64_t ddr_aie_addr_offset = 0x80000000;
+#ifndef _WIN32
+    static const char* xemtarget = std::getenv("XCL_EMULATION_DEVICE_TARGET"); // NOLINT
+    static const bool is_npu3_snl = xemtarget && (std::strcmp(xemtarget, "npu3_snl") == 0);
+    if (is_npu3_snl)
+      return 0;
+#endif
+    return ddr_aie_addr_offset;
+  }
+
   patcher(symbol_type type, std::vector<patch_info> ctrlcode_offset, xrt_core::patcher::buf_type t)
     : m_buf_type(t)
     , m_symbol_type(type)
@@ -239,13 +252,11 @@ struct patcher
   void
   patch57_aie4(uint32_t* bd_data_ptr, uint64_t patch) const
   {
-    constexpr uint64_t ddr_aie_addr_offset = 0x80000000;
-
     uint64_t base_address =
       ((static_cast<uint64_t>(bd_data_ptr[0]) & 0x1FFFFFF) << 32) |                   // NOLINT
       bd_data_ptr[1];
 
-    base_address += patch + ddr_aie_addr_offset;  //2G offset
+    base_address += patch + get_ddr_aie_addr_offset();  // 2G offset (or 0 offset for emulation device)
     bd_data_ptr[1] = (uint32_t)(base_address & 0xFFFFFFFF);                           // NOLINT
     bd_data_ptr[0] = (bd_data_ptr[0] & 0xFE000000) | ((base_address >> 32) & 0x1FFFFFF);// NOLINT
   }
@@ -266,43 +277,37 @@ struct patcher
   void
   patch_ctrl48(uint32_t* bd_data_ptr, uint64_t patch) const
   {
-    // This patching scheme is originated from NPU firmware
-    constexpr uint64_t ddr_aie_addr_offset = 0x80000000;
 
     uint64_t base_address =
       ((static_cast<uint64_t>(bd_data_ptr[3]) & 0xFFF) << 32) |                       // NOLINT
       ((static_cast<uint64_t>(bd_data_ptr[2])));
 
-    base_address = base_address + patch + ddr_aie_addr_offset;
+    base_address = base_address + patch + get_ddr_aie_addr_offset();
     bd_data_ptr[2] = (uint32_t)(base_address & 0xFFFFFFFC);                           // NOLINT
     bd_data_ptr[3] = (bd_data_ptr[3] & 0xFFFF0000) | (base_address >> 32);            // NOLINT
   }
 
   void
   patch_shim48(uint32_t* bd_data_ptr, uint64_t patch) const
   {
-    // This patching scheme is originated from NPU firmware
-    constexpr uint64_t ddr_aie_addr_offset = 0x80000000;
 
     uint64_t base_address =
       ((static_cast<uint64_t>(bd_data_ptr[2]) & 0xFFFF) << 32) |                      // NOLINT
       ((static_cast<uint64_t>(bd_data_ptr[1])));
 
-    base_address = base_address + patch + ddr_aie_addr_offset;
+    base_address = base_address + patch + get_ddr_aie_addr_offset();
     bd_data_ptr[1] = (uint32_t)(base_address & 0xFFFFFFFC);                           // NOLINT
     bd_data_ptr[2] = (bd_data_ptr[2] & 0xFFFF0000) | (base_address >> 32);            // NOLINT
   }
 
   void
   patch_ctrl57_aie4(uint32_t* bd_data_ptr, uint64_t patch) const
   {
-    // This patching scheme is originated from NPU firmware
-    constexpr uint64_t ddr_aie_addr_offset = 0x80000000;
 
     // bd_data_ptr is a pointer to the header of the control code
     uint64_t base_address = (((uint64_t)bd_data_ptr[1] & 0x1FFFFFF) << 32) | bd_data_ptr[2]; // NOLINT
 
-    base_address += patch + ddr_aie_addr_offset;
+    base_address += patch + get_ddr_aie_addr_offset();
     bd_data_ptr[2] = (uint32_t)(base_address & 0xFFFFFFFF);                                  // NOLINT
     bd_data_ptr[1] = (bd_data_ptr[1] & 0xFE000000) | ((base_address >> 32) & 0x1FFFFFF);     // NOLINT
   }