Merge pull request #127 from cr1901/picorv32-data

libbase/crt0-picorv32: Add support for .data sections.
2018-11-20 21:15:50 -08:00 · 2018-11-20 21:15:50 -08:00 · ab799f7bd7
parent 80bdae0e55 89c702187a
commit ab799f7bd7
1 changed files with 14 additions and 0 deletions
--- a/litex/soc/software/libbase/crt0-picorv32.S
+++ b/litex/soc/software/libbase/crt0-picorv32.S
@ -194,6 +194,20 @@ _crt0:
  la t1, _irq_mask
  sw t0, 0(t1)

+#ifdef EXECUTE_IN_PLACE
+  /* Load DATA */
+  la t0, _erodata
+  la t1, _fdata
+  la t2, _edata
+3:
+  lw t3, 0(t0)
+  sw t3, 0(t1)
+  /* _edata is aligned to 16 bytes. Use word-xfers. */
+  addi t0, t0, 4
+  addi t1, t1, 4
+  bltu t1, t2, 3b
+#endif
+
  /* Clear BSS */
  la t0, _fbss
  la t1, _ebss