Add RNMI CSRs and instruction

Don't merge yet; it's still early days for this extension.
riscv · Feb 22, 2022 · 71cd23a · 71cd23a
1 parent 2497a8c
commit 71cd23a
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Showing 2 changed files with 6 additions and 1 deletion.
diff --git a/opcodes-system b/opcodes-system
@@ -3,6 +3,7 @@ ecall     11..7=0 19..15=0 31..20=0x000 14..12=0 6..2=0x1C 1..0=3
 ebreak    11..7=0 19..15=0 31..20=0x001 14..12=0 6..2=0x1C 1..0=3
 sret      11..7=0 19..15=0 31..20=0x102 14..12=0 6..2=0x1C 1..0=3
 mret      11..7=0 19..15=0 31..20=0x302 14..12=0 6..2=0x1C 1..0=3
+mnret     11..7=0 19..15=0 31..20=0x702 14..12=0 6..2=0x1C 1..0=3
 dret      11..7=0 19..15=0 31..20=0x7b2 14..12=0 6..2=0x1C 1..0=3
 sfence.vma 11..7=0 rs1 rs2 31..25=0x09  14..12=0 6..2=0x1C 1..0=3
 wfi       11..7=0 19..15=0 31..20=0x105 14..12=0 6..2=0x1C 1..0=3

diff --git a/parse_opcodes b/parse_opcodes
@@ -206,6 +206,10 @@ csrs = [
   (0x344, 'mip'),
   (0x34a, 'mtinst'),
   (0x34b, 'mtval2'),
+  (0x350, 'mnscratch'),
+  (0x351, 'mnepc'),
+  (0x352, 'mncause'),
+  (0x353, 'mnstatus'),
   (0x3a0, 'pmpcfg0'),
   (0x3a1, 'pmpcfg1'),
   (0x3a2, 'pmpcfg2'),
@@ -895,7 +899,7 @@ def print_insts(*names):
 def make_supervisor_latex_table():
   print_header('r', 'i')
   print_subtitle('Trap-Return Instructions')
-  print_insts('sret', 'mret')
+  print_insts('sret', 'mret', 'mnret')
   print_subtitle('Interrupt-Management Instructions')
   print_insts('wfi')
   print_subtitle('Supervisor Memory-Management Instructions')