From: lkcl <lkcl@web>
Date: Tue, 7 Jun 2022 18:00:04 +0000 (+0100)
Subject: (no commit message)
X-Git-Tag: opf_rfc_ls005_v1~1916
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=e554fa73550e22749d5eab72ef6252f3a8d08559;p=libreriscv.git

---

diff --git a/openpower/sv/compliancy_levels.mdwn b/openpower/sv/compliancy_levels.mdwn
index 27a6bf4db..0b3c06ef0 100644
--- a/openpower/sv/compliancy_levels.mdwn
+++ b/openpower/sv/compliancy_levels.mdwn
@@ -41,3 +41,14 @@ but the Compliance Tests for Embedded will only test for 32.  DSP/VPU Level
 is permitted to implement the DCT REMAP capability, but will not be
 permitted to declare meeting the 3D/Advanced Level unless implementing
 *all* REMAP Capabilities.
+
+# Ultra-Embedded Level
+
+This level is the bare minimum requirements, where everything with the
+exception of the `setvl` instruction may be software-emulated through
+JIT Translation or Illegal Instruction traps.  SVSTATE joins MSR and PC
+as direct peers and must be switched on any context-switch (Trap or
+Exception)
+
+
+* MSR is saved/restored to SRR1