From: Gabriel Somlo <gsomlo@gmail.com>
Date: Wed, 17 Jun 2020 00:19:46 +0000 (-0400)
Subject: cpu/mor1kx: fix .data initialization (follow-up to PR #567)
X-Git-Tag: 24jan2021_ls180~174^2
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=e96cfbbc83cc9acde4b8fcc8d78e595818a9f613;p=litex.git

cpu/mor1kx: fix .data initialization (follow-up to PR #567)
---

diff --git a/litex/soc/cores/cpu/mor1kx/crt0.S b/litex/soc/cores/cpu/mor1kx/crt0.S
index ff77910d..b8eeec07 100644
--- a/litex/soc/cores/cpu/mor1kx/crt0.S
+++ b/litex/soc/cores/cpu/mor1kx/crt0.S
@@ -153,6 +153,25 @@ _crt0:
     l.movhi    r1, hi(_fstack)
     l.ori     r1, r1, lo(_fstack)
 
+    /* Init DATA */
+    l.movhi   r14,hi(_fdata_rom)
+    l.ori     r14,r14,lo(_fdata_rom)
+    l.movhi   r18,hi(_fdata)
+    l.ori     r18,r18,lo(_fdata)
+    l.movhi   r20,hi(_edata)
+    l.ori     r20,r20,lo(_edata)
+.copyDATA:
+    l.sfeq    r18,r20
+    l.bf      .doneDATA
+     l.nop
+    l.lwz     r3,0(r14)
+    l.sw      0(r18),r3
+    l.addi    r14,r14,4
+    l.addi    r18,r18,4
+    l.j       .copyDATA
+     l.nop
+.doneDATA:
+
     /* Clear BSS */
     l.movhi    r21, hi(_fbss)
     l.ori     r21, r21, lo(_fbss)