From 8603f22bcf822c588f7b88006fe662f9259073b9 Mon Sep 17 00:00:00 2001
From: Adrien Bourmault <neox@os-k.eu>
Date: Thu, 6 Feb 2020 08:59:34 +0100
Subject: [PATCH] Now detecting FADT

---
 kaleid/kernel/io/acpi.c | 34 +++++++++++++++++++++++-----------
 1 file changed, 23 insertions(+), 11 deletions(-)

diff --git a/kaleid/kernel/io/acpi.c b/kaleid/kernel/io/acpi.c
index cb5c74a..424eda0 100644
--- a/kaleid/kernel/io/acpi.c
+++ b/kaleid/kernel/io/acpi.c
@@ -175,29 +175,41 @@ static inline void IoInitRXSDT(void)
 static inline void IoSearchAcpiTables(void)
 {
     SDTHeader *xrsdt = AcpiSDT;
-    SDTHeader *cur = NULL;
     SDTHeader *table = NULL;
+    uint *curInt = NULL;
+    ulong *curLong = NULL;
     register char checksum;
     int entries;
 
-    if (IoACPIVersion == 1)
+    if (IoACPIVersion == 1) {
         entries = (xrsdt->length - sizeof(xrsdt)) / 4;
-    else
+    } else {
         entries = (xrsdt->length - sizeof(xrsdt)) / 8;
+    }
 
     KernLog("\tACPI detected %d entries\n", entries);
 
+    curInt = &(xrsdt->sdtTablePtr);
+    curLong = &(xrsdt->sdtTablePtr);
+
     for (int i = 0; i < entries; i++) {
 
-        cur = (SDTHeader *)((ulong)(xrsdt->sdtTablePtr));
-        table = &cur[i];
+        if (IoACPIVersion == 1)
+            table = (SDTHeader *)curInt[i];
+        else
+            table = (SDTHeader *)curLong[i];
 
-        // Checksum calculation
-        //checksum = DoChecksum(table, (size_t)table->length, 0, 0);
-
-        //KernLog("Checksum : %d\n", (int)checksum);
-
-        KernLog("\tACPI System Table id %s [%p]\n", table->signature, table);
+        //KernLog("\tACPI RSDT[%d] %p\n", i, table);
+        if (MmIsBusyZone(table)) {
+            checksum = DoChecksum(table, (size_t)table->length, 0, 0);
+            if (!checksum) {
+                KernLog("\tACPI System Table %s (OEM %s) length %d [%p]\n",
+                        table->signature,
+                        table->OEMID,
+                        table->length,
+                        table);
+            }
+        }
     }
 }