| ID: | 2664 |
| From: | Carlo Pisani <ca...@gmail.com> |
| Date: | Wed, 20 Feb 2019 11:29:16 +0100 |
| Subject: | Re: [pcb-rnd] gentoo overlay for pcb-rnd (v2.1.1) |
| in-reply-to: | 2662 from Gabriel Paubert <pa...@iram.es> |
> Mips 4 bit architecture?
4 stands for "mips4", it's 32bit, big-endian (be)
mips is composed mainly by { 1, 2, 3, 4, 32 } revisions of the ISA
- the mips1 is { R2K, R3K }
- the mips3 is mainly R4.4K and R5K (used by SGI, and others, e.g. Nintendo)
- the mips4 is mainly SGI CPUs, like { R10K, R12K, R14K, R16K }
- the mips32 is usually used by routers, but not only by routers
routers like the ubiquiti rsp or the rsl(1) are mips32r2 bigendian,
while boards based on the "dragonchip" (chinese routers) are based on
mips32r2 little endian (often plus other new opcodes,
completely/partially unsupported by gcc and binutils -> you need
patches -> only available in China/released with a big delay)
anyway:
for mips32be, we are using a couple of rsp in parallel, liquid cooled
in order to overclock the SoC to 800Mhz
for mips4/be, we are using SGI IP30 (aka Octane), on 2xR14K @ 600Mhz
we don't have big little endian mips, and the only le is a mikrotik
rb532 board(3), used for an other project(2). It doesn't have enough
"cpu power" for compiling stuff.
there are also mips32/le motherboards, e.g. the ci20, which is clocked
@ 1Ghz, and has 1Gbyte ofr ram, but unfortunately it's abandoned (and
not fully working), even if the latest kernel is 3.18-something, so
it's potentially able to run a modern rootfs
currently, even the gentoo mips stage3 is rather abandoned, and there
are a lot of problems with packages like perl, and alike; this happens
even with HPPA and PowerPC, but mips is the one with the less support
at the moment, and a lot of stuff is simply broken due to the lack of
man-power
(1) we were discussing "new" (made in 2011, 2015) hardware, here
http://www.downthebunker.xyz/wonderland/reloaded/bazaar/viewtopic.php?f=33&p=1138&sid=4ec040d0a932652dde2a424e20df8702#p1138
(2) sonoko
http://www.downthebunker.xyz/wonderland/reloaded/bazaar/viewtopic.php?f=36&t=133&sid=0b34ec4dff3ca5933b707ff388154259
(3) rb532
http://www.downthebunker.xyz/wonderland/chunk_of/stuff/public/projects/sonoko-x11/router-board/rb532-mobo-bn.jpg
Reply subtree:
2664 Re: [pcb-rnd] gentoo overlay for pcb-rnd (v2.1.1) from Carlo Pisani <ca...@gmail.com>