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https://github.com/openhwgroup/cvw
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42 lines
841 B
ArmAsm
42 lines
841 B
ArmAsm
// debug.S
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// David_Harris@hmc.edu 4 February 2023
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// Small code snippets for the purpose of debugging issues
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// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
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# openhwgroup/cvw Issue #55
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li x1, 0x7ff0000000000001
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fmv.w.x f4, x1
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li x1, 7ff8000000000000
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fmv.w.x f9, x1
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fsgnjx.s f12,f9,f4 # expected f 0xffffffff7fc00000
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#########################
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# HTIF and signature
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#########################
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write_tohost:
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la t1, tohost
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li t0, 1 # 1 for success, 3 for failure
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sd t0, 0(t1) # send success code
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self_loop:
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j self_loop # wait
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.section .tohost
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tohost: # write to HTIF
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.dword 0
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fromhost:
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.dword 0
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.data
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.EQU XLEN,64
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begin_signature:
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.fill 2*(XLEN/32),4,0xdeadbeef #
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end_signature:
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# Initialize stack with room for 512 bytes
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.bss
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.space 512
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topofstack: |