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Paul Mackerras f06ffcf9b7 Add a GPIO controller and use it to drive the shield I/O pins on the Arty ... This adds a GPIO controller which provides 32 bits of I/O. The registers are modelled on the set used by the gpio-ftgpio010.c driver in the Linux kernel. Currently there is no interrupt capability implemented, though an interrupt line from the GPIO subsystem to the XICS has been connected. For the Arty A7 board, GPIO lines 0 to 13 are connected to the pins labelled IO0 to IO13 on the "shield" connector, GPIO lines 14 to 29 connect to IO26 to IO41, GPIO line 30 connects to the pin labelled A (aka IO42), and GPIO line 31 is connected to LED 7. Signed-off-by: Paul Mackerras <paulus@ozlabs.org>		3 years ago
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LICENSE	Initial import of microwatt	5 years ago
acorn-cle-215.xdc	acorn: Add support for the Acorn CLE 215+	4 years ago
arty_a7.xdc	Add a GPIO controller and use it to drive the shield I/O pins on the Arty	3 years ago
clk_gen_bypass.vhd	Fix clk_gen_bypass	5 years ago
clk_gen_ecp5.vhd	Add PLL for ECP5 device	4 years ago
clk_gen_mcmm.vhd	Improve PLL/MMCM clocks configuration	5 years ago
clk_gen_plle2.vhd	acorn: Add support for the Acorn CLE 215+	4 years ago
cmod_a7-35.xdc	Add SPI configuration to Xilinx constraint files	5 years ago
firmware.hex	Add a few more FPGA related files	5 years ago
fpga-random.vhdl	Add random number generator and implement the darn instruction	4 years ago
fpga-random.xdc	Add random number generator and implement the darn instruction	4 years ago
genesys2.xdc	fpga: Add support for Genesys2	4 years ago
hello_world.hex	hello_world: Use new headers and frequency from syscon	4 years ago
main_bram.vhdl	Fix some ghdlsynth issues with fpga_bram	4 years ago
nexys-video.xdc	spi: Add SPI Flash controller	4 years ago
nexys_a7.xdc	Add SPI configuration to Xilinx constraint files	5 years ago
pp_fifo.vhd	pp_fifo: Fix full fifo losing all data on simultaneous push & pop	4 years ago
pp_soc_uart.vhd	uart: Remove combinational loops on ack and stall signal	4 years ago
pp_utilities.vhd	Initial import of microwatt	5 years ago
soc_reset.vhdl	soc_reset: Use counters, add synchronizers	4 years ago
soc_reset_tb.vhdl	Exit cleanly from testbench on success	4 years ago
top-acorn-cle-215.vhdl	acorn: Add support for the Acorn CLE 215+	4 years ago
top-arty.vhdl	Add a GPIO controller and use it to drive the shield I/O pins on the Arty	3 years ago
top-generic.vhdl	fetch1: Implement a simple branch target cache	3 years ago
top-genesys2.vhdl	fpga: Add support for Genesys2	4 years ago
top-nexys-video.vhdl	fetch1: Implement a simple branch target cache	3 years ago