From: Matthias Kruk <m@m10k.eu>
Date: Fri, 20 Sep 2019 06:15:59 +0000 (+0900)
Subject: Add code for debugging of PAE paging structures
X-Git-Url: https://git.corax.cc/?a=commitdiff_plain;h=3a34f6a29637ee0faf928c124d116337edd05c9e;p=corax

Add code for debugging of PAE paging structures
---

diff --git a/kernel/arch/paging.c b/kernel/arch/paging.c
index 8a9e042..ee1587b 100644
--- a/kernel/arch/paging.c
+++ b/kernel/arch/paging.c
@@ -179,10 +179,53 @@ static void _pg_dir_debug_arch(pg_dir_t *pd)
 		break;
 	}
 
-	case PG_MODE_PAE:
+	case PG_MODE_PAE: {
+		struct pdpt *dir;
+		u32_t i;
+
+		dir = (struct pdpt*)pd->pd_base;
+
+		for(i = 0; i < 4; i++) {
+			struct pae_page_table *tbl;
+			int j;
+
+			if(!(dir->pdpt_entries[i] & PAGE_ATTR_PRESENT)) {
+				continue;
+			}
+
+			dbg_printf("cr3[%01u]           = 0x%016llx\n", i, dir->pdpt_entries[i]);
+			tbl = (struct pae_page_table*)((unsigned long)dir->pdpt_entries[i] & ~0xfff);
+
+			for(j = 0; j < 512; j++) {
+				struct pae_page_table *ttbl;
+				int k;
+
+				if(!(tbl->ppt_entries[j] & PAGE_ATTR_PRESENT)) {
+					continue;
+				}
+
+				dbg_printf("cr3[%01u][%03u]      = 0x%016llx\n", i, j, tbl->ppt_entries[j]);
+
+				if(!(tbl->ppt_entries[j] & PAGE_ATTR_SIZE)) {
+					ttbl = (struct pae_page_table*)((unsigned long)tbl->ppt_entries[j] & ~0xfff);
+
+					for(k = 0; k < 512; k++) {
+						if(!(ttbl->ppt_entries[k] & PAGE_ATTR_PRESENT)) {
+							continue;
+						}
+
+						dbg_printf("cr3[%01u][%03u][%03u] = 0x%016llx\n",
+								   i, j, k, ttbl->ppt_entries[k]);
+					}
+				}
+			}
+		}
+
 		break;
 	}
 
+	}
+
 	return;
 }
 #endif /* FEATURE(DEBUG) */