From ff5a77f6f2ee9e7086b0f2c16cf0752a2d105d33 Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Tue, 22 Jul 2025 14:43:37 -0400
Subject: oemu: cpu: Add link registers and SR_STATE

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 usr.bin/oemu/include/oemu/cpu.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'usr.bin/oemu/include')

diff --git a/usr.bin/oemu/include/oemu/cpu.h b/usr.bin/oemu/include/oemu/cpu.h
index 78b92da..882fe93 100644
--- a/usr.bin/oemu/include/oemu/cpu.h
+++ b/usr.bin/oemu/include/oemu/cpu.h
@@ -31,12 +31,19 @@
 #define _OEMU_CPU_H_
 
 #include <sys/types.h>
+#include <sys/param.h>
 #include <stdint.h>
 #include <stddef.h>
 #include <oemu/types.h>
 
 #define MEMORY_SIZE 512
 
+/*
+ * Processor state register
+ */
+#define CPU_SRS_SV      BIT(1)  /* Supervisor flag */
+#define CPU_SRS_CARRY   BIT(2)  /* Carry flag */
+
 /*
  * System memory
  *
@@ -53,10 +60,16 @@ struct sysmem {
  *
  * @xreg: X<n>
  * @ip: Instruction pointer
+ * @sr_state: Processor state register
+ * @blr: Branch link register
+ * @ilr: Interrupt link register
  */
 struct cpu_regs {
     reg_t xreg[16];
     reg_t ip;
+    reg_t sr_state;
+    reg_t blr;
+    reg_t ilr;
 };
 
 struct oemu_cpu {
-- 
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