litex/CHANGES

[> 2020.XX, planned for December 2020
---------------------------------

	[> Issues resolved
	------------------
	- fix SDCard writes.
	- fix crt0 .data initialize on SERV/Minerva.
	- fix Zynq7000 AXI HP Slave integration.

	[> Added Features
	------------------
	- Wishbone2CSR: Add registered version and use it on system with SDRAM.
	- litex_json2dts: Add Mor1kx DTS generation support.
	- Build: Add initial Radiant support for NX FPGA family.
	- SoC: Allow ROM to be optionally writable (for contents overwrite over UARTBone/Etherbone).
	- LiteSDCard: Improve BIOS support.
	- UARTBone: Add clock domain support.
	- Clocking: Uniformize reset on iCE40PLL/ECP5PLL.
	- LiteDRAM: Improve calibration and add BIOS debug commands.
	- Clocking: Add initial Ultrascale+ support.
	- Sim: Allow dynamic enable/disable of tracing.
	- BIOS: Improve memtest and report.
	- BIOS: Rename/reorganize commands.
	- litex_server: Simplify usage with PCIe and add debug parameter.
	- LitePCIe: Add Ultrascale(+) support up to Gen3 X16.
	- LiteSATA: Add BIOS/Boot integration.
	- Add litex_cli to provides common RemoteClient functions: get identifier, dump regs, etc...
	- LiteDRAM: Simplify BIST integration.
	- Toolchains/Programmers: Improve checks/error reporting.
	- BIOS: add leds command.
	- SoC: Do a full reset of the SoC on reboot (not only the CPU).
	- Etherbone: Improve efficiency/performance.
	- LiteDRAM: Improve DDR4/DDR3 calibration.
	- Build: Add initial Oxide support for NX FPGA family.
	- Clock/RAM: Reorganize for better modularity.
	- SPI-OPI: Various improvements for Betrusted.
	- litex_json2dts: Improvements to use it with mor1kx and VexRiscv-SMP.
	- Microwatt: Add IRQ support.*
	- BIOS: Add i2c_scan command.
	- Builder: Simplify Documentation generation with --doc args on targets.
	- CSR: Add documentation to EventManager registers.
	- BIOS: Allow disabling timestamp for reproducible builds.
	- Symbiflow: Remove workarounds on targets.
	- litex_server: Simplify use on PCIe, allow direct CommXY use in scripts to bypass litex_server.
	- Zynq7000: Improve PS7 configuration support (now supporting .xci/preset/dict)
	- CV32E40P: Improve OBI efficiency.
	- litex_term: Improve upload speed with CRC check enabled, deprecate --no-crc (no longer useful).
	- BIOS: Add mem_list command to list available memory and use mem_xy commands on them.
	- litex_term: Add Crossover and JTAG_UART support.
	- Software: Add minimal bare metal demo app.
	- UART: Add Crossover+Bridge support.
	- VexRiscv-SMP: Integrate AES support.
	- LitePCIe: Allow AXI mastering from FPGA (AXI-Lite and Full).
	- mor1kx: Add standard+fpu and linux+fpu variants.

	[> API changes/Deprecation
	--------------------------
	- BIOS: commands have been renamed/reorganized.
	- LiteDRAM: rdcmdphase/wrcmdphase no longer exposed.
	- CSR: change default csr_data_width from 8 to 32.

[> 2020.08, planned for July 2020
---------------------------------

	[> Issues resolved
	------------------
	- Fix flush_cpu_icache on VexRiscv.
	- Fix `.data` section placed in rom (#566)

	[> Added Features
	------------------
	- Properly integrate Minerva CPU.
	- Add nMigen dependency.
	- Pluggable CPUs.
	- BIOS history, autocomplete.
	- Improve boards's programmers.
	- Add Microwatt CPU support (with GHDL-Yosys-plugin support for FOSS toolchains).
	- Speedup Memtest using an LFSR.
	- Add LedChaser on boards.
	- Improve WishboneBridge.
	- Improve Diamond constraints.
	- Use InterconnectPointToPoint when 1 master,1 slave and no address translation.
	- Add CV32E40P CPU support (ex RI5CY).
	- JTAG UART with uart_name=jtag_uart (validated on Spartan6, 7-Series, Ultrascale(+)).
	- Add Symbiflow experimental support on Arty.
	- Add SDCard (SPI and SD modes) boot from FAT/exFAT filesystems with FatFs.
	- Simplify boot with boot.json configuration file.
	- Revert to a single crt0 (avoid ctr/xip variants).
	- Add otional DMA bus for Cache Coherency on CPU(s) with DMA/Cache Coherency interface.
	- Add AXI-Lite bus standard support.
	- Add VexRiscv SMP CPU support.

	[> API changes/Deprecation
	--------------------------
	- Add --build --load arguments to targets.
	- Deprecate soc.interconnect.wishbone.UpConverter (will be rewritten if useful).
	- Deprecate soc.interconnect.wishbone.CSRBank (Does not seem to be used by anyone).
	- Move soc.interconnect.wishbone2csr.WB2CSR to soc.interconnect.wishbone.Wishbone2CSR.
	- Move soc.interconnect.wishbonebridge.WishboneStreamingBridge to soc.cores.uart.Stream2Wishbone.
	- Rename --gateware-toolchain target parameter to --toolchain.
	- Integrate Zynq's PS7 as a regular CPU (zynq7000) and deprecate SoCZynq.

[> 2020.04, released April 28th, 2020
-------------------------------------

	[> Description
	--------------
	First release of LiteX and the ecosystem of cores!

	LiteX is a Migen/MiSoC based Core/SoC builder that provides the infrastructure to easily create
	Cores/SoCs (with or without CPU).

	The common components of a SoC are provided directly:
	- Buses and Streams (Wishbone, AXI, Avalon-ST)
	- Interconnect
	- Common cores (RAM, ROM, Timer, UART, etc...)
	- CPU wrappers/integration
	- etc...
	And SoC creation capabilities can be greatly extended with the ecosystem of LiteX cores (DRAM,
	PCIe, Ethernet, SATA, etc...) that can be integrated/simulated/build easily with LiteX.

	It also provides build backends for open-source and vendors toolchains.

	[> Issues resolved
	------------------
	- NA

	[> Added Features
	------------------
	- NA

	[> API changes/Deprecation
	--------------------------
	- https://github.com/enjoy-digital/litex/pull/399: Converting LiteX to use Python modules.