zeldin

FW upload starts with a packet of type 8:

byte 0 : 00
byte 1 : 08 = FW upload start command
byte 2 : 03 = packet sequence number
byte 3 : 01 = upload protocol version?  Must be 1
byte 4-5 : 00 00 = total number of bytes (16-bit little endian), 0 means 64K (max size)
byte 6-7 : 7e 04 = total number of data blocks (16-bit little endian)
byte 8-9 : 00 00 = ? (not used)
byte 10: 39 = bytes of flash data per data block (decimal: 57) (not used)

zeldin

# compile with:	 gcc -m32 -static -nostdlib -o hello hello.s

	
	.text

	.globl	_start

_start:	
	bl	1f
1:

zeldin

diff --git a/src/cmd/link/internal/ld/config.go b/src/cmd/link/internal/ld/config.go
index 60b6491859..2d8f96408e 100644
--- a/src/cmd/link/internal/ld/config.go
+++ b/src/cmd/link/internal/ld/config.go
@@ -247,9 +247,6 @@ func determineLinkMode(ctxt *Link) {
                        }
                        ctxt.LinkMode = LinkInternal
                case "1":
-                       if objabi.GOARCH == "ppc64" {
-                               Exitf("external linking requested via GO_EXTLINK_ENABLED but not supported for %s/ppc64", objabi.GOOS)

zeldin

This is a comparison between an AVR softcore and the picorv32 when used in a real application. The numbers are for the entire application, not for the cores in isolation. Only minimal changes were made to the HDL and firmware code to adapt to the new core (the peripherals were updated to handle a 32-bit bus, and the interrupt handling was adapted to picorv32, otherwise the code is identical) and the same optimization flags (-Os -mrelax) were used with both cores.

The following were the relevant design constraints:

• Synthetizable on an iCE40 HX8K
• fCPU = 17 MHz

zeldin

vanadis ~ # cat /usr/local/portage/app-misc/twoleveltest/twoleveltest-0.ebuild
EAPI=7
SLOT=0
KEYWORDS="riscv"
S="${WORKDIR}"
src_install() {
  echo "hello" > foobar
  insinto /usr/lib64/lp64d
  doins foobar

zeldin

1) Build the Docker at https://github.com/gregwebs/ghc-docker-dev.git
   for the target arch
2) Inside the Docker, make a manual build from the upstreams ghc
   sources, with all the Debian patches applied, with a prefix of
   /tmp/ghcfoo
3) Copy /tmp/ghcfoo from the Docker to the target system
4) Set up /etc/portage/env/dev-lang/ghc to add the ghc binary in
   /tmp/ghcfoo to the path
5) Build the ebuild with USE=ghcbootstrap
6) Delete the /etc/portage/env file and rebuild the ebuild again, to

zeldin

#!/bin/sh
version="$@"
if [ -z "$version" ]; then
  version="`equery l -F '$fullversion' -p dev-lang/ghc | tail -1`"
fi
PKGDIR="/tmp/`uname -m`/packages"
[ -d "$PKGDIR" ] || mkdir -p "$PKGDIR"
export PKGDIR
CFLAGS="-O2 -pipe"
export CFLAGS

zeldin

Debian patches needed for riscv64:

latomic-subword.patch

Debian patches needed for ppc (32-bit):

latomic-subword.patch
latomic-64bit.patch

zeldin

FEATURES=test USE=test emerge -1a dev-haskell/mtl dev-haskell/text dev-haskell/fail dev-haskell/transformers dev-haskell/parsec dev-haskell/transformers-compat dev-haskell/cabal dev-haskell/tagged dev-haskell/splitmix dev-haskell/primitive dev-haskell/colour dev-haskell/nanospec dev-haskell/cabal-doctest dev-haskell/th-abstraction dev-haskell/clock dev-haskell/setenv dev-haskell/stm dev-haskell/random dev-haskell/call-stack dev-haskell/ansi-terminal dev-haskell/quickcheck dev-haskell/hunit dev-haskell/tf-random dev-haskell/quickcheck-io dev-haskell/hspec-expectations
FEATURES=-test USE=-test emerge -1a dev-haskell/hspec-discover dev-haskell/hspec-core  # check only these 2 are merged
FEATURES=test USE=test emerge -1a dev-haskell/hspec-discover dev-haskell/hspec-core
FEATURES=test USE=test emerge -a @preserved-rebuild # Should rebuild dev-haskell/hspec

Only three rebuilds are needed; dev-haskell/hspec-discover dev-haskell/hspec-core and dev-haskell/hspec


Build list for first command (25 builds)

zeldin

//          Copyright Oliver Kowalke 2016.
// Distributed under the Boost Software License, Version 1.0.
//    (See accompanying file LICENSE_1_0.txt or copy at
//          http://www.boost.org/LICENSE_1_0.txt)
// libcontext adaptation by Marcus Comstedt 2022

#include <cstdlib>
#include <iostream>
#include <memory>