add t0 config

device/arista/x86_64-arista_7260cx3_64/Arista-7260CX3-C64/buffers_defaults_t0.j2

@@ -0,0 +1,46 @@
+{%- set default_cable = '5m' %}
+
+{%- macro generate_port_lists(PORT_ALL) %}
+    {# Generate list of ports #}
+    {%- for port_idx in range(0,64) %}
+        {%- if PORT_ALL.append("Ethernet%d" % (port_idx * 4)) %}{%- endif %}
+    {%- endfor %}
+{%- endmacro %}
+
+{%- macro generate_buffer_pool_and_profiles() %}
+    "BUFFER_POOL": {
+        "ingress_lossless_pool": {
+            "size": "33329088",
+            "type": "ingress",
+            "mode": "dynamic",
+            "xoff": "7827456"
+        },
+        "egress_lossy_pool": {
+            "size": "26663272",
+            "type": "egress",
+            "mode": "dynamic"
+        },
+        "egress_lossless_pool": {
+            "size": "42349632",
+            "type": "egress",
+            "mode": "static"
+        }
+    },
+    "BUFFER_PROFILE": {
+        "ingress_lossy_profile": {
+            "pool":"[BUFFER_POOL|ingress_lossless_pool]",
+            "size":"0",
+            "static_th":"44302336"
+        },
+        "egress_lossless_profile": {
+            "pool":"[BUFFER_POOL|egress_lossless_pool]",
+            "size":"0",
+            "static_th":"42349632"
+        },
+        "egress_lossy_profile": {
+            "pool":"[BUFFER_POOL|egress_lossy_pool]",
+            "size":"1664",
+            "dynamic_th":"-1"
+        }
+    },
+{%- endmacro %}

device/arista/x86_64-arista_7260cx3_64/Arista-7260CX3-C64/sai.profile.j2

@@ -0,0 +1,14 @@
+{# Get sai.profile based on switch_role #}
+{%- if DEVICE_METADATA is defined -%}
+{%-     set switch_role = DEVICE_METADATA['localhost']['type'] -%}
+{%-     if 'torrouter' in switch_role.lower() or 'torswitch' in switch_role.lower() %}
+{%         set sai_profile_contents = 'SAI_INIT_CONFIG_FILE=/usr/share/sonic/hwsku/th2-a7260cx3-64-64x100G-t0.config.bcm' -%}
+{%-     else %}
+{%         set sai_profile_contents = 'SAI_INIT_CONFIG_FILE=/usr/share/sonic/hwsku/th2-a7260cx3-64-64x100G-t1.config.bcm' -%}
+{%-     endif %}
+{%- else %}
+{%      set sai_profile_contents = 'SAI_INIT_CONFIG_FILE=/usr/share/sonic/hwsku/th2-a7260cx3-64-64x100G-t1.config.bcm' -%}
+{%- endif %}
+{# Write the contents of sai_ profile_filename to sai.profile file #}
+{{ sai_profile_contents }}
+SAI_NUM_ECMP_MEMBERS=64