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[broadcom]: Add BCM config variable that contains premier cancun firm…
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…ware path (#6611)

BRCM SDK 6.5.21 includes firmware updates (premier cancun) for TD3 platforms. The firmware update is required on TD3 platforms, which is packaged with BCMSAI 4.3.0.10.

**- How I did it**

Updated BCM config with a new variable that specifies the firmware package path. SDK uses this path to locate firmware packages and load during cold boot.

**- How to verify it**

 
bsv
BRCM SAI ver: [4.3.0.10], OCP SAI ver: [1.7.1], SDK ver: [sdk-6.5.21] CANCUN ver: [5.3.3]
drivshell>
admin@str2-7050cx3-acs-02:~$ bcmsh
Press Enter to show prompt.
Press Ctrl+C to exit.
NOTICE: Only one bcmsh or bcmcmd can connect to the shell at same time.
 
 
drivshell>cancun stat
cancun stat
UNIT0 CANCUN:
        CIH: LOADED
        Ver: 06.06.01
 
        CMH: LOADED
        Ver: 06.06.01
        SDK Ver: 06.05.21
 
        CCH: LOADED
       Ver: 06.06.01
        SDK Ver: 06.05.21
 
        CEH: LOADED
        Ver: 06.06.01
        SDK Ver: 06.05.21
 
drivshell>
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smaheshm authored Jan 30, 2021
1 parent 3ffa352 commit 908884b
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sai_load_hw_config=/etc/bcm/flex/bcm56870_a0/b870.6.6.1/
#polarity/lanemap is using TH2 style.
core_clock_frequency=1525
dpp_clock_ratio=2:3
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@@ -1,3 +1,4 @@
sai_load_hw_config=/etc/bcm/flex/bcm56870_a0/b870.6.6.1/
#polarity/lanemap is using TH2 style.
core_clock_frequency=1525
dpp_clock_ratio=2:3
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@@ -1,3 +1,4 @@
sai_load_hw_config=/etc/bcm/flex/bcm56870_a0/b870.6.6.1/
help_cli_enable=1
ifp_inports_support_enable=1
ipv6_lpm_128b_enable=0x1
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sai_load_hw_config=/etc/bcm/flex/bcm56870_a0/b870.6.6.1/
os=unix

core_clock_frequency=1525
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sai_load_hw_config=/etc/bcm/flex/bcm56870_a0/b870.6.6.1/
os=unix

core_clock_frequency=1525
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@@ -1,3 +1,4 @@
sai_load_hw_config=/etc/bcm/flex/bcm56870_a0/b870.6.6.1/
os=unix

core_clock_frequency=1525
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@@ -1,3 +1,4 @@
sai_load_hw_config=/etc/bcm/flex/bcm56870_a0/b870.6.6.1/
os=unix

core_clock_frequency=1525
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@@ -1,3 +1,4 @@
sai_load_hw_config=/etc/bcm/flex/bcm56870_a0/b870.6.6.1/
os=unix

core_clock_frequency=1525
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sai_load_hw_config=/etc/bcm/flex/bcm56870_a0/b870.6.6.1/
os=unix
dpp_clock_ratio=2:3
oversubscribe_mode=1
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sai_load_hw_config=/etc/bcm/flex/bcm56870_a0/b870.6.6.1/
os=unix

dpp_clock_ratio=2:3
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sai_load_hw_config=/etc/bcm/flex/bcm56870_a0/b870.6.6.1/
os=unix
portmap_5.0=5:10
portmap_6.0=6:10
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sai_load_hw_config=/etc/bcm/flex/bcm56870_a0/b870.6.6.1/
os=unix
portmap_5.0=5:25
portmap_6.0=6:25
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sai_load_hw_config=/etc/bcm/flex/bcm56870_a0/b870.6.6.1/
pbmp_oversubscribe=0x00003fc000000ff0000003fc000001fe
pbmp_xport_xe=0xffffffffffffffffffffffffffffffffffff
core_clock_frequency=1525
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sai_load_hw_config=/etc/bcm/flex/bcm56870_a0/b870.6.6.1/
### fix for sonic
ptp_ts_pll_fref=50000000
ptp_bs_fref_0=50000000
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sai_load_hw_config=/etc/bcm/flex/bcm56870_a0/b870.6.6.1/
### fix for sonic
ptp_ts_pll_fref=50000000
ptp_bs_fref_0=50000000
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sai_load_hw_config=/etc/bcm/flex/bcm56870_a0/b870.6.6.1/
bcm_tunnel_term_compatible_mode=1
core_clock_frequency=1525
dpp_clock_ratio=2:3
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sai_load_hw_config=/etc/bcm/flex/bcm56870_a0/b870.6.6.1/
bcm_tunnel_term_compatible_mode=1
core_clock_frequency=1525
dpp_clock_ratio=2:3
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@@ -1,3 +1,4 @@
sai_load_hw_config=/etc/bcm/flex/bcm56870_a0/b870.6.6.1/
bcm_tunnel_term_compatible_mode=1
core_clock_frequency=1525
dpp_clock_ratio=2:3
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