getting memory map from bios and passing to kernel

1 files changed, 71 insertions, 0 deletions

diff --git a/kernel/kernel.c b/kernel/kernel.c
index 94a5b9f..7c5f982 100644
--- a/kernel/kernel.c
+++ b/kernel/kernel.c
@@ -48,13 +48,84 @@ void kernel_main()
     
     }
 
+    
     //0xA5000
     scr_put_hex((uint32_t)prober>>16);
     scr_put_hex((uint32_t)prober&0xffff);
     scr_put_string_nl(" finished!");
     //
+
     */
 
+    uint16_t *memmap=0x7c00+0x120;
+    uint32_t avail_mem=0;
+
+    //print memory map:
+    
+    while(1)
+    {
+	if(memmap[8]==0)break;
+	if(memmap[8]==1)
+	{
+	    avail_mem+=memmap[4]+(memmap[5]<<16); 
+	}
+	//bytes: 8 8 4 4// 
+	//scr_put_hex(memmap[3]);
+	//scr_put_string(" ");
+	//scr_put_hex(memmap[2]);
+	//scr_put_string(" ");
+	scr_put_hex(memmap[1]);
+	scr_put_string(" ");
+	scr_put_hex(memmap[0]);
+	scr_put_string(" ");
+//	scr_put_hex(memmap[4]);
+//	scr_put_string(" ");
+//	scr_put_hex(memmap[5]);
+//	scr_put_string(" ");
+//	scr_put_hex(memmap[6]);
+//	scr_put_string(" ");
+//	scr_put_hex(memmap[7]);
+	
+
+	scr_put_string(" - ");
+//	scr_put_hex(memmap[8]);
+//	scr_put_string(" ");
+//	scr_put_hex(memmap[9]);
+//	scr_put_string(" ");
+//	scr_put_hex(memmap[10]);
+//	scr_put_string(" ");
+//	scr_put_hex(memmap[11]);
+//	scr_put_string(" ");
+	//scr_put_hex(memmap[7]);
+	//scr_put_string(" ");
+	//scr_put_hex(memmap[6]);
+	//scr_put_string(" ");
+	scr_put_hex(memmap[5]);
+	scr_put_string(" ");
+	scr_put_hex(memmap[4]);
+
+	scr_put_string(" : ");
+	scr_put_hex(memmap[8]);
+//	scr_put_string(" ");
+//	scr_put_hex(memmap[9]);
+	
+
+	scr_put_string_nl("");
+
+	memmap+=12;
+    }
+
+    
+    scr_put_string("Total Available Mem: ");
+    scr_put_hex(avail_mem>>16);
+    scr_put_string(" ");
+    scr_put_hex(avail_mem&0xffff);
+    scr_put_string_nl(" byte");
+    scr_put_string_nl("");
+
+
+
+
 
     // init and interrupt decriptor table 
     int_init(0x08);