dramforever’s gists

dramforever / region.rs

Created December 2, 2023 20:50

	use core::{
	fmt,
	ops::{Range, RangeInclusive},
	};

	/// A non-empty range of `usize` values
	///
	/// Like [`RangeInclusive`], `Region` can repesent any `usize` range, even those
	/// that contain `usize::MAX`.
	#[derive(Clone, Copy, PartialEq, Eq)]

dramforever / indvar.fth

Last active November 22, 2023 19:10

	\ https://www.cs.utexas.edu/users/EWD/transcriptions/EWD00xx/EWD28.html

	: indvar create 0 , ['] @ ,
	does> dup cell+ @ execute ;

	: :=
	>body
	dup -rot ! \ Store value
	cell+ ['] @ swap ! ; \ Make literal indvar

dramforever / itc.c

Last active November 1, 2023 15:29

	#include <stdio.h>
	#include <stdlib.h>

	#define DECL_STATE \
	[[maybe_unused]] const struct word const ip, \
	[[maybe_unused]] size_t *sp, \
	[[maybe_unused]] const struct word const *rsp
	#define STATE ip, sp, rsp

	struct word {

dramforever / _info.md

Last active April 6, 2023 16:16

How much RISC-V instruction space do we have left?

If you really want to use this janky code:

$ git clone https://github.com/riscv/riscv-opcodes
$ # You need like a patch to fix extension handling... might submit PR in a bit
$ python3 parse.py rv_* rv64_*
$ yaml2json < instr_dict.yaml > instr_dict.json # Sorry
$ python3 free-space.py

dramforever / qemu-aia.dts

Created February 17, 2023 05:20

	// QEMU emulator version 7.2.0
	// qemu-system-riscv64 -M virt,aia=aplic-imsic,aia-guests=2,aclint=true,dumpdtb=dtb.dtb -smp 2

	#include <dt-bindings/interrupt-controller/irq.h>

	/dts-v1/;

	/ {
	compatible = "riscv-virtio";
	model = "riscv-virtio,qemu";

dramforever / drawfb.c

Created February 15, 2023 07:15

Playing around with /dev/fb0

	#define _GNU_SOURCE

	#include <fcntl.h>
	#include <linux/fb.h>
	#include <stddef.h>
	#include <stdio.h>
	#include <sys/ioctl.h>
	#include <sys/mman.h>

	int main() {

dramforever / pinctrl-starfive-jtag.dtsi

Last active July 10, 2022 08:10

	&gpio {
	pinctrl-names = "default";
	pinctrl-0 = <&gpiojtag_pins>;

	gpiojtag_pins: gpiojtag-0 {
	input-pins {
	pinmux =
	<GPIOMUX(1, GPO_LOW, GPO_DISABLE, GPI_CPU_JTAG_TCK)>,
	<GPIOMUX(2, GPO_LOW, GPO_DISABLE, GPI_CPU_JTAG_TDI)>,
	<GPIOMUX(3, GPO_LOW, GPO_DISABLE, GPI_CPU_JTAG_TMS)>;

dramforever / clkgen.txt

Last active July 13, 2022 18:30

(Partially) undocumented JH7100 registers found in headers

	Register: clk_cpundbus_root_ctrl_REG_ADDR
	Address: CLKGEN_BASE_ADDR + 0x0

	31 24 16 8 0
	\| \| \| \| \|
	[------<>------------------------]
	'-------------------------- [25:24] (rw) clk_cpundbus_root_src


	Register: clk_dla_root_ctrl_REG_ADDR

dramforever / Makefile

Last active March 3, 2022 09:06

Stack trace

	CFLAGS += -fno-omit-frame-pointer -funwind-tables
	LDFLAGS += -lunwind

	.PHONY: all
	all: stack-trace

	.PHONY: clean
	clean:
	rm stack-trace

dramforever / nixenv.zsh

Last active March 14, 2024 17:45

nixenv

	declare -A nixenv_paths

	nadd() {
	setopt local_options err_return pipefail
	local out out_paths
	for installable in "$@"; do
	local with_outputs="$installable^*"
	if [[ "$installable" = "^" ]]; then
	with_outputs="$installable"
	fi

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