From e82292fcfcab5dc09da0f8af3c7def5e16a2bbd2 Mon Sep 17 00:00:00 2001
From: Efraim Flashner
Date: Sun, 20 Mar 2022 16:11:58 +0200
Subject: gn: Add gem5.

---
 gn/packages/virtualization.scm | 137 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 137 insertions(+)
 create mode 100644 gn/packages/virtualization.scm

(limited to 'gn/packages/virtualization.scm')

diff --git a/gn/packages/virtualization.scm b/gn/packages/virtualization.scm
new file mode 100644
index 0000000..0636cba
--- /dev/null
+++ b/gn/packages/virtualization.scm
@@ -0,0 +1,137 @@
+(define-module (gn packages virtualization)
+  #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (guix gexp)
+  #:use-module (guix utils)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix git-download)
+  #:use-module (guix build-system python)
+  #:use-module (guix build-system scons)
+  #:use-module (gnu packages)
+  #:use-module (gnu packages boost)
+  #:use-module (gnu packages compression)
+  #:use-module (gnu packages cpp)
+  #:use-module (gnu packages graphviz)
+  #:use-module (gnu packages image)
+  #:use-module (gnu packages m4)
+  #:use-module (gnu packages pkg-config)
+  #:use-module (gnu packages protobuf)
+  #:use-module (gnu packages python)
+  #:use-module (gnu packages python-xyz))
+
+(define-public gem5
+  (package
+    (name "gem5")
+    (version "21.2.1.0")
+    (source
+      (origin
+        (method git-fetch)
+        (uri (git-reference
+               (url "https://gem5.googlesource.com/public/gem5")
+               (commit (string-append "v" version))))
+        (file-name (git-file-name name version))
+        (sha256
+         (base32 "0wyns8cfkigzw3m21331m8ydc7akm8l2lp0kci4pq8jyzsanmjm3"))
+        (snippet
+          #~(begin
+              (use-modules (guix build utils))
+              ;; For reproducibility.
+              (substitute* "src/base/date.cc"
+                (("__DATE__") "\"1970-01-01\"")
+                (("__TIME__") "\"00:00:00\""))))))
+    (build-system scons-build-system)
+    (arguments
+     `(#:scons-flags
+       (list "--verbose")
+       #:tests? #f      ; TODO: How to run test suite?
+       #:build-targets '("build/ARM/gem5.opt"
+                         "build/MIPS/gem5.opt"
+                         "build/NULL/gem5.opt"
+                         "build/POWER/gem5.opt"
+                         "build/RISCV/gem5.opt"
+                         "build/SPARC/gem5.opt"
+                         "build/X86/gem5.opt")
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'patch-source
+           (lambda* (#:key inputs #:allow-other-keys)
+             (substitute* "SConstruct"
+               ;; Scons does not use the environment variables by default,
+               ;; but this substitution makes it do so.
+               ;(("main = Environment")
+               ; "main = Environment(ENV=os.environ)\nmain = Environment")
+               ;; Force adding missing includes into the environment.
+               (("main\\.Append\\(CPPPATH=\\[Dir\\('" all)
+                (string-append
+                  all (assoc-ref inputs "kernel-headers") "/include')])\n"
+                  all (assoc-ref inputs "libpng") "/include')])\n"
+                  all (assoc-ref inputs "zlib") "/include')])\n"
+                  all)))
+             (substitute* "ext/libelf/SConscript"
+               (("m4env\\.Tool" all)
+                (string-append
+                  "m4env.Append(CPPPATH=[Dir('"
+                  (assoc-ref inputs "kernel-headers")
+                  "/include')])\n"
+                  all)))
+             (substitute* "ext/libelf/native-elf-format"
+               (("cc") ,(cc-for-target)))))
+         (replace 'check
+           (lambda* (#:key tests? #:allow-other-keys)
+             (when tests?
+               (invoke "python3" "tests/run.py"))))
+         (replace 'install
+           (lambda* (#:key outputs #:allow-other-keys)
+             (let* ((out (assoc-ref outputs "out"))
+                    (bin (string-append out "/bin/")))
+               (mkdir-p bin)
+               (for-each
+                 (lambda (arch)
+                   (when (directory-exists?
+                           (string-append "build/" (string-upcase arch)))
+                     (copy-file
+                       (string-append "build/" (string-upcase arch) "/gem5.opt")
+                       (string-append bin "gem5-" arch ".opt"))
+                     (copy-file
+                       (string-append "build/" (string-upcase arch) "/gem5py")
+                       (string-append bin "gem5py-" arch))
+                     (copy-file
+                       (string-append "build/" (string-upcase arch) "/gem5py_m5")
+                       (string-append bin "gem5py_m5-" arch))))
+                 (list "arm" "mips" "null" "power" "riscv" "sparc" "x86"))))))))
+    (inputs
+     (list gperftools
+           libpng
+           protobuf
+           python
+           python-pydot
+           python-six
+           zlib))
+    (native-inputs
+     (list boost
+           m4
+           pkg-config))
+    (home-page "http://gem5.org/")
+    (synopsis "Modular platform for computer-system architecture research")
+    (description "The gem5 simulator is a modular platform for computer-system
+architecture research, encompassing system-level architecture as well as
+processor microarchitecture.")
+    (license license:bsd-2)))
+
+(define-public gem5-riscv
+  (package
+    (inherit gem5)
+    (name "gem5-riscv")
+    (arguments
+     (substitute-keyword-arguments (package-arguments gem5)
+       ((#:build-targets _)
+        `(list "build/RISCV/gem5.opt"))
+       ((#:phases phases)
+        `(modify-phases ,phases
+           (replace 'install
+               (lambda* (#:key outputs #:allow-other-keys)
+               (let* ((out (assoc-ref outputs "out"))
+                      (bin (string-append out "/bin")))
+                 (install-file "build/RISCV/gem5.opt" bin)
+                 (install-file "build/RISCV/gem5py" bin)
+                 (install-file "build/RISCV/gem5py_m5" bin))))))))))
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