From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Sat, 15 Jan 2022 13:47:36 +0000 (+0000)
Subject: add atomic reservation field to Power Decoder data structures
X-Git-Tag: sv_maxu_works-initial~566
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=1cbf5b6fa0b41367efc50349f0a6e80b7dfffcad;p=openpower-isa.git

add atomic reservation field to Power Decoder data structures
---

diff --git a/src/openpower/decoder/decode2execute1.py b/src/openpower/decoder/decode2execute1.py
index e7deff5b..d0f37d2e 100644
--- a/src/openpower/decoder/decode2execute1.py
+++ b/src/openpower/decoder/decode2execute1.py
@@ -84,6 +84,7 @@ class Decode2ToOperand(IssuerDecode2ToOperand):
         self.is_signed = Signal(reset_less=True)
         self.data_len = Signal(4, reset_less=True) # bytes
         self.byte_reverse  = Signal(reset_less=True)
+        self.reserve  = Signal(reset_less=True) # atomic update ldarx/stdcx etc
         self.sign_extend  = Signal(reset_less=True)# do we need this?
         self.ldst_mode  = Signal(LDSTMode, reset_less=True) # LD/ST mode
         self.write_cr0 = Signal(reset_less=True)
diff --git a/src/openpower/decoder/power_decoder.py b/src/openpower/decoder/power_decoder.py
index 8fabeabc..4f7ab855 100644
--- a/src/openpower/decoder/power_decoder.py
+++ b/src/openpower/decoder/power_decoder.py
@@ -163,6 +163,7 @@ power_op_csvmap = {'function_unit': 'unit',
                    'cr_out': 'CR out',
                    'ldst_len': 'ldst len',
                    'upd': 'upd',
+                   'rsrv': 'reserve', # atomic operation
                    'rc_sel': 'rc',
                    'cry_in': 'cry in',
                    }