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firmware: fw_base: Remove CSR_MTVEC update check
Remove unnecessary CSR_MTVEC read to reduce the openSBI CSR requirement. Mux are costly in FPGA. Allowing CSR_MTVEC to be write only is usefull for the FMax/Area of FPGA softcore. https://github.com/SpinalHDL/opensbi.git branch mtvec Signed-off-by: Charles Papon <charles.papon.90@gmail.com> Reviewed-by: Atish Patra <atish.patra@wdc.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
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@ -400,9 +400,6 @@ _start_warm:
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/* Setup trap handler */
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la a4, _trap_handler
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csrw CSR_MTVEC, a4
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/* Make sure that mtvec is updated */
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1: csrr a5, CSR_MTVEC
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bne a4, a5, 1b
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/* Initialize SBI runtime */
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csrr a0, CSR_MSCRATCH
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