Add SN5640 SIMX platform with default SKU

device/mellanox/x86_64-nvidia_sn5640_simx-r0/ACS-SN5640/buffers.json.j2

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+../../x86_64-mlnx_msn2700-r0/ACS-MSN2700/buffers.json.j2

device/mellanox/x86_64-nvidia_sn5640_simx-r0/ACS-SN5640/buffers_defaults_t0.j2

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+{#
+    Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES.
+    Apache-2.0
+
+    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.
+#}
+{% set default_cable = '40m' %}
+{% set ingress_lossless_pool_size =  '2359296' %}
+{% set ingress_lossy_pool_size =  '2359296' %}
+{% set egress_lossless_pool_size =  '136209408' %}
+{% set egress_lossy_pool_size =  '2359296' %}
+
+{%- macro generate_port_lists(PORT_ALL) %}
+    {# Generate list of ports #}
+    {%- for port_idx in range(0, 32) %}
+        {%- if PORT_ALL.append("Ethernet%d" % (port_idx)) %}{%- endif %}
+    {%- endfor %}
+{%- endmacro %}
+
+{%- macro generate_buffer_pool_and_profiles() %}
+    "BUFFER_POOL": {
+        "ingress_lossless_pool": {
+            {%- if dynamic_mode is not defined %}
+            "size": "{{ ingress_lossless_pool_size }}",
+            {%- endif %}
+            "type": "ingress",
+            "mode": "dynamic"
+        },
+        "ingress_lossy_pool": {
+            {%- if dynamic_mode is not defined %}
+            "size": "{{ ingress_lossy_pool_size }}",
+            {%- endif %}
+            "type": "ingress",
+            "mode": "dynamic"
+        },
+        "egress_lossless_pool": {
+            "size": "{{ egress_lossless_pool_size }}",
+            "type": "egress",
+            "mode": "dynamic"
+        },
+        "egress_lossy_pool": {
+            {%- if dynamic_mode is not defined %}
+            "size": "{{ egress_lossy_pool_size }}",
+            {%- endif %}
+            "type": "egress",
+            "mode": "dynamic"
+        }
+    },
+    "BUFFER_PROFILE": {
+        "ingress_lossless_profile": {
+            "pool":"ingress_lossless_pool",
+            "size":"0",
+            "dynamic_th":"7"
+        },
+        "ingress_lossy_profile": {
+            "pool":"ingress_lossy_pool",
+            "size":"0",
+            "dynamic_th":"3"
+        },
+        "egress_lossless_profile": {
+            "pool":"egress_lossless_pool",
+            "size":"0",
+            "dynamic_th":"7"
+        },
+        "egress_lossy_profile": {
+            "pool":"egress_lossy_pool",
+            "size":"9216",
+            "dynamic_th":"7"
+        },
+        "q_lossy_profile": {
+            "pool":"egress_lossy_pool",
+            "size":"0",
+            "dynamic_th":"3"
+        }
+    },
+{%- endmacro %}
+
+{%- macro generate_profile_lists(port_names) %}
+    "BUFFER_PORT_INGRESS_PROFILE_LIST": {
+{% for port in port_names.split(',') %}
+        "{{ port }}": {
+            "profile_list" : "ingress_lossless_profile,ingress_lossy_profile"
+        }{% if not loop.last %},{% endif %}
+
+{% endfor %}
+    },
+    "BUFFER_PORT_EGRESS_PROFILE_LIST": {
+{% for port in port_names.split(',') %}
+        "{{ port }}": {
+            "profile_list" : "egress_lossless_profile,egress_lossy_profile"
+        }{% if not loop.last %},{% endif %}
+
+{% endfor %}
+    }
+{%- endmacro %}
+
+{%- macro generate_queue_buffers(port_names) %}
+    "BUFFER_QUEUE": {
+{% for port in port_names.split(',') %}
+        "{{ port }}|3-4": {
+            "profile" : "egress_lossless_profile"
+        },
+{% endfor %}
+{% for port in port_names.split(',') %}
+        "{{ port }}|0-2": {
+            "profile" : "q_lossy_profile"
+        },
+{% endfor %}
+{% for port in port_names.split(',') %}
+        "{{ port }}|5-6": {
+            "profile" : "q_lossy_profile"
+        }{% if not loop.last %},{% endif %}
+
+{% endfor %}
+    }
+{%- endmacro %}
+
+

device/mellanox/x86_64-nvidia_sn5640_simx-r0/ACS-SN5640/buffers_defaults_t1.j2

@@ -0,0 +1,128 @@
+{#
+    Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES.
+    Apache-2.0
+
+    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.
+#}
+{% set default_cable = '300m' %}
+{% set ingress_lossless_pool_size =  '18874368' %}
+{% set ingress_lossy_pool_size =  '71459840' %}
+{% set egress_lossless_pool_size =  '136209408' %}
+{% set egress_lossy_pool_size =  '71459840' %}
+
+{%- macro generate_port_lists(PORT_ALL) %}
+    {# Generate list of ports #}
+    {%- for port_idx in range(0, 32) %}
+        {%- if PORT_ALL.append("Ethernet%d" % (port_idx)) %}{%- endif %}
+    {%- endfor %}
+{%- endmacro %}
+
+{%- macro generate_buffer_pool_and_profiles() %}
+    "BUFFER_POOL": {
+        "ingress_lossless_pool": {
+            {%- if dynamic_mode is not defined %}
+            "size": "{{ ingress_lossless_pool_size }}",
+            {%- endif %}
+            "type": "ingress",
+            "mode": "dynamic"
+        },
+        "ingress_lossy_pool": {
+            {%- if dynamic_mode is not defined %}
+            "size": "{{ ingress_lossy_pool_size }}",
+            {%- endif %}
+            "type": "ingress",
+            "mode": "dynamic"
+        },
+        "egress_lossless_pool": {
+            "size": "{{ egress_lossless_pool_size }}",
+            "type": "egress",
+            "mode": "dynamic"
+        },
+        "egress_lossy_pool": {
+            {%- if dynamic_mode is not defined %}
+            "size": "{{ egress_lossy_pool_size }}",
+            {%- endif %}
+            "type": "egress",
+            "mode": "dynamic"
+        }
+    },
+    "BUFFER_PROFILE": {
+        "ingress_lossless_profile": {
+            "pool":"ingress_lossless_pool",
+            "size":"0",
+            "dynamic_th":"7"
+        },
+        "ingress_lossy_profile": {
+            "pool":"ingress_lossy_pool",
+            "size":"0",
+            "dynamic_th":"3"
+        },
+        "egress_lossless_profile": {
+            "pool":"egress_lossless_pool",
+            "size":"0",
+            "dynamic_th":"7"
+        },
+        "egress_lossy_profile": {
+            "pool":"egress_lossy_pool",
+            "size":"9216",
+            "dynamic_th":"7"
+        },
+        "q_lossy_profile": {
+            "pool":"egress_lossy_pool",
+            "size":"0",
+            "dynamic_th":"3"
+        }
+    },
+{%- endmacro %}
+
+{%- macro generate_profile_lists(port_names) %}
+    "BUFFER_PORT_INGRESS_PROFILE_LIST": {
+{% for port in port_names.split(',') %}
+        "{{ port }}": {
+            "profile_list" : "ingress_lossless_profile,ingress_lossy_profile"
+        }{% if not loop.last %},{% endif %}
+
+{% endfor %}
+    },
+    "BUFFER_PORT_EGRESS_PROFILE_LIST": {
+{% for port in port_names.split(',') %}
+        "{{ port }}": {
+            "profile_list" : "egress_lossless_profile,egress_lossy_profile"
+        }{% if not loop.last %},{% endif %}
+
+{% endfor %}
+    }
+{%- endmacro %}
+
+{%- macro generate_queue_buffers(port_names) %}
+    "BUFFER_QUEUE": {
+{% for port in port_names.split(',') %}
+        "{{ port }}|3-4": {
+            "profile" : "egress_lossless_profile"
+        },
+{% endfor %}
+{% for port in port_names.split(',') %}
+        "{{ port }}|0-2": {
+            "profile" : "q_lossy_profile"
+        },
+{% endfor %}
+{% for port in port_names.split(',') %}
+        "{{ port }}|5-6": {
+            "profile" : "q_lossy_profile"
+        }{% if not loop.last %},{% endif %}
+
+{% endfor %}
+    }
+{%- endmacro %}
+
+

device/mellanox/x86_64-nvidia_sn5640_simx-r0/ACS-SN5640/buffers_dynamic.json.j2

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+../../x86_64-mlnx_msn2700-r0/ACS-MSN2700/buffers_dynamic.json.j2

device/mellanox/x86_64-nvidia_sn5640_simx-r0/ACS-SN5640/create_only_config_db_buffers.json

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+{
+    "DEVICE_METADATA": {
+        "localhost": {
+            "create_only_config_db_buffers": "true"
+        }
+    }
+}