4 ms·

ANGEL – Browser-Based RISC-V ISA Simulator

59 points by e19293001 11y ago

jmcomets 11y ago
First thing I tried was a fork-bomb. Funny how the browser didn't crash but the simulator isn't responding. I feel evil. :D
Businesset 11y ago
?
rwmj 11y ago
Here are my notes on running Linux on RISC-V under qemu. I wonder when RISC-V support will go upstream in qemu? https://rwmj.wordpress.com/2015/06/11/booting-risc-v-linux-with-qemu/#content https://rwmj.wordpress.com/2015/06/11/booting-risc-v-linux-w...
- s-macke 11y ago
  I guess the problem is, that the new privileged ISA has to be implemented. With this ISA, Linux runs only via a proxy kernel and the devices have to be accessed in a special way. I guess it will take time until it will go upstream.
iso8859-1 11y ago
Github: https://github.com/riscv/riscv-angel https://github.com/riscv/riscv-angel jor1k has som RISV-V support now too, I wonder why that was done if this was in the works.
- s-macke 11y ago
  The RISC-V port in jor1k supports only 32-Bit whereas Angel supports only 64-Bit. Also jor1k supports the newest privilege instruction API whereas Angel hasn't been updated yet. Especially the jor1k port is assembler optimized by looking at the code the Javascript engines produce. I get up to 120 MIPS. But a comparison with Angel is unfair, because Javascript doesn't support 64-Bit yet. From my side the main idea is support the number of MMIO devices with virtio, framebuffer, network, sound and so on. Unfortunately the device support is still in an unfinished state and I don't know where RISC-V will go in the future. So at the moment you get just a dumb terminal and block device, which is pretty useless. There are also other reasons. The RISC-V project is more active currently than OpenRISC. So I hope to get finally a real distribution running with package management. There is still no native gdb for OpenRISC for example. But for RISC-V I know, that someone develops it. The same is true for other software.
bodyfour 11y ago
The fact that the uname is "ucbvax" is a nice touch.
- kjs3 11y ago
  I might have used 'kremvax'.

59 points by e19293001 11y ago

First thing I tried was a fork-bomb. Funny how the browser didn't crash but the simulator isn't responding. I feel evil. :D

Businesset 11y ago

rwmj 11y ago

Here are my notes on running Linux on RISC-V under qemu. I wonder when RISC-V support will go upstream in qemu? https://rwmj.wordpress.com/2015/06/11/booting-risc-v-linux-with-qemu/#content https://rwmj.wordpress.com/2015/06/11/booting-risc-v-linux-w...

s-macke 11y ago
I guess the problem is, that the new privileged ISA has to be implemented. With this ISA, Linux runs only via a proxy kernel and the devices have to be accessed in a special way. I guess it will take time until it will go upstream.

iso8859-1 11y ago

Github: https://github.com/riscv/riscv-angel https://github.com/riscv/riscv-angel jor1k has som RISV-V support now too, I wonder why that was done if this was in the works.

s-macke 11y ago
The RISC-V port in jor1k supports only 32-Bit whereas Angel supports only 64-Bit. Also jor1k supports the newest privilege instruction API whereas Angel hasn't been updated yet. Especially the jor1k port is assembler optimized by looking at the code the Javascript engines produce. I get up to 120 MIPS. But a comparison with Angel is unfair, because Javascript doesn't support 64-Bit yet. From my side the main idea is support the number of MMIO devices with virtio, framebuffer, network, sound and so on. Unfortunately the device support is still in an unfinished state and I don't know where RISC-V will go in the future. So at the moment you get just a dumb terminal and block device, which is pretty useless. There are also other reasons. The RISC-V project is more active currently than OpenRISC. So I hope to get finally a real distribution running with package management. There is still no native gdb for OpenRISC for example. But for RISC-V I know, that someone develops it. The same is true for other software.

bodyfour 11y ago

The fact that the uname is "ucbvax" is a nice touch.

kjs3 11y ago
I might have used 'kremvax'.