 H. Peter Anvin
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78fb11f073
fpga, rv32: Add custom atomic instructions lw.l/sw.u
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1 year ago |
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H. Peter Anvin
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3672b35b21
picorv32: export user_context and addr[1:0] to outside bus
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1 year ago |
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H. Peter Anvin
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ea69fdc29b
fpga/picorv32: fix waitirq instructions after changes
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1 year ago |
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H. Peter Anvin
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2ec1af473b
picorv32: further IRQ latency improvements; regenerate with Quartus 22.1
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1 year ago |
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H. Peter Anvin
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bf9aa45886
riscv32: add the ctz instruction for better interrupt latency
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1 year ago |
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H. Peter Anvin
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1917765d2f
picorv32: add support for multiple user CPU contexts
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2 years ago |
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H. Peter Anvin
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2ec75f1807
fpga: virtual JTAG interface
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2 years ago |
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H. Peter Anvin
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372899ea3b
Move most code to SDRAM; fix problems with code in SDRAM; cleanups
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3 years ago |
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H. Peter Anvin
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ec99762a84
Use waitirq rather than suspending a memory transaction for SD card
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3 years ago |
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H. Peter Anvin
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affd869f20
Add to waitirq and "andmask" and an "ormask".
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3 years ago |
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H. Peter Anvin
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cd15d8fd49
picorv32: revamp the Q registers to be a full bank switch
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3 years ago |
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H. Peter Anvin
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ea8bf559a9
picorv32: fix aliasing of mret = retirq
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3 years ago |
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H. Peter Anvin
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0cf198bfb2
picorv32: have maskirq take a control mask; let mret = retirq
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3 years ago |
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H. Peter Anvin
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c78f9d909d
Roll back picorv32 hacks for unaligned memory support
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3 years ago |
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H. Peter Anvin
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062a3d9eb1
Reorganize tree so a single Makefile can do the right thing
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3 years ago |
