From 31b5bb185de13377cdad81585ef8607e9fb850b4 Mon Sep 17 00:00:00 2001
From: Javier <dev.git@javispedro.com>
Date: Mon, 31 Jan 2022 02:10:19 +0100
Subject: add save state & restore support

---
 Adlib.cpp  | 35 +++++++++++++++++++++++++----------
 Mpu401.cpp | 18 ++++++++----------
 2 files changed, 33 insertions(+), 20 deletions(-)

diff --git a/Adlib.cpp b/Adlib.cpp
index efd93c0..6fa6ccf 100644
--- a/Adlib.cpp
+++ b/Adlib.cpp
@@ -485,15 +485,24 @@ static DECLCALLBACK(VBOXSTRICTRC) adlibIoPortWrite(PPDMDEVINS pDevIns, void *pvU
 /**
  * @callback_method_impl{FNSSMDEVSAVEEXEC}
  */
-static DECLCALLBACK(int) adlibR3SaveExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSMHandle)
+static DECLCALLBACK(int) adlibR3SaveExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM)
 {
     PADLIBSTATE     pThis = PDMDEVINS_2_DATA(pDevIns, PADLIBSTATE);
     PCPDMDEVHLPR3   pHlp  = pDevIns->pHlpR3;
 
-    // TODO
-    NOREF(pThis);
-    NOREF(pHlp);
-    NOREF(pSSMHandle);
+    // Don't care if the configuration changes after resume, so not saving it
+
+    // However save as much of the current state as possible
+    pHlp->pfnSSMPutU16   (pSSM, pThis->oplReg);
+
+    // TODO: We should save a copy of all current registers
+
+    pHlp->pfnSSMPutU8    (pSSM, pThis->timer1Value);
+    pHlp->pfnSSMPutU8    (pSSM, pThis->timer2Value);
+    pHlp->pfnSSMPutU64   (pSSM, pThis->timer1Expire);
+    pHlp->pfnSSMPutU64   (pSSM, pThis->timer2Expire);
+    pHlp->pfnSSMPutBool  (pSSM, pThis->timer1Enable);
+    pHlp->pfnSSMPutBool  (pSSM, pThis->timer2Enable);
 
 	return 0;
 }
@@ -501,7 +510,7 @@ static DECLCALLBACK(int) adlibR3SaveExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSMHand
 /**
  * @callback_method_impl{FNSSMDEVLOADEXEC}
  */
-static DECLCALLBACK(int) adlibR3LoadExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSMHandle, uint32_t uVersion, uint32_t uPass)
+static DECLCALLBACK(int) adlibR3LoadExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
 {
     PADLIBSTATE     pThis = PDMDEVINS_2_DATA(pDevIns, PADLIBSTATE);
     PCPDMDEVHLPR3   pHlp  = pDevIns->pHlpR3;
@@ -509,10 +518,16 @@ static DECLCALLBACK(int) adlibR3LoadExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSMHand
     Assert(uPass == SSM_PASS_FINAL);
     NOREF(uPass);
 
-    // TODO
-    NOREF(pThis);
-    NOREF(pHlp);
-    NOREF(pSSMHandle);
+    pHlp->pfnSSMGetU16   (pSSM, &pThis->oplReg);
+
+    pHlp->pfnSSMGetU8    (pSSM, &pThis->timer1Value);
+    pHlp->pfnSSMGetU8    (pSSM, &pThis->timer2Value);
+    pHlp->pfnSSMGetU64   (pSSM, &pThis->timer1Expire);
+    pHlp->pfnSSMGetU64   (pSSM, &pThis->timer2Expire);
+    pHlp->pfnSSMGetBool  (pSSM, &pThis->timer1Enable);
+    pHlp->pfnSSMGetBool  (pSSM, &pThis->timer2Enable);
+
+    pThis->tmLastWrite = RTTimeSystemMilliTS();
 
     if (uVersion > ADLIB_SAVED_STATE_VERSION)
         return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
diff --git a/Mpu401.cpp b/Mpu401.cpp
index cb7606b..8e2badc 100644
--- a/Mpu401.cpp
+++ b/Mpu401.cpp
@@ -321,15 +321,14 @@ static DECLCALLBACK(VBOXSTRICTRC) mpuIoPortWrite(PPDMDEVINS pDevIns, void *pvUse
 /**
  * @callback_method_impl{FNSSMDEVSAVEEXEC}
  */
-static DECLCALLBACK(int) mpuR3SaveExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSMHandle)
+static DECLCALLBACK(int) mpuR3SaveExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM)
 {
     PMPUSTATE       pThis = PDMDEVINS_2_DATA(pDevIns, PMPUSTATE);
     PCPDMDEVHLPR3   pHlp  = pDevIns->pHlpR3;
 
-    // TODO
-    NOREF(pThis);
-    NOREF(pHlp);
-    NOREF(pSSMHandle);
+    pHlp->pfnSSMPutBool(pSSM, pThis->fHaveInput);
+    pHlp->pfnSSMPutU8  (pSSM, pThis->uInput);
+    pHlp->pfnSSMPutBool(pSSM, pThis->fModeUart);
 
 	return 0;
 }
@@ -337,7 +336,7 @@ static DECLCALLBACK(int) mpuR3SaveExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSMHandle
 /**
  * @callback_method_impl{FNSSMDEVLOADEXEC}
  */
-static DECLCALLBACK(int) mpuR3LoadExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSMHandle, uint32_t uVersion, uint32_t uPass)
+static DECLCALLBACK(int) mpuR3LoadExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
 {
     PMPUSTATE       pThis = PDMDEVINS_2_DATA(pDevIns, PMPUSTATE);
     PCPDMDEVHLPR3   pHlp  = pDevIns->pHlpR3;
@@ -345,10 +344,9 @@ static DECLCALLBACK(int) mpuR3LoadExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSMHandle
     Assert(uPass == SSM_PASS_FINAL);
     NOREF(uPass);
 
-    // TODO
-    NOREF(pThis);
-    NOREF(pHlp);
-    NOREF(pSSMHandle);
+    pHlp->pfnSSMGetBool(pSSM, &pThis->fHaveInput);
+    pHlp->pfnSSMGetU8  (pSSM, &pThis->uInput);
+    pHlp->pfnSSMGetBool(pSSM, &pThis->fModeUart);
 
     if (uVersion > MPU_SAVED_STATE_VERSION)
         return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
-- 
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