X-Git-Url: http://git.joshuawise.com/netwatch.git/blobdiff_plain/15521f07dc09a276839c46168201d31ee1ae4a97..8ba7e5b28a7f23ebf2423df41379516c8cbac6b5:/aseg-paging/smi.c

diff --git a/aseg-paging/smi.c b/aseg-paging/smi.c
index f2b574f..d519341 100644
--- a/aseg-paging/smi.c
+++ b/aseg-paging/smi.c
@@ -7,6 +7,7 @@
 #include <serial.h>
 #include <fb.h>
 #include <output.h>
+#include <msr.h>
 #include "../net/net.h"
 #include "vga-overlay.h"
 
@@ -18,6 +19,9 @@ void smi_entry(void)
 {
 	char statstr[512];
 
+	/* Reenable caching on SMRAM. */
+	WRMSR(0x202, (RDMSR(0x202) & ~(0xFFULL)) | 0x06ULL);
+
 	pcisave = inl(0xCF8);
 	vgasave = inb(0x3D4);
 	pci_unbother_all();
@@ -28,33 +32,10 @@ void smi_entry(void)
         	fb->getvmode(fb->priv);
 
 	counter++;
-	sprintf(statstr, "NetWatch! %08x %08x", smi_status(), counter);
-	strblit(statstr, 0, 0, 0);
-	
-	/* wee! */
-	if (fb && !fb->curmode.text)
+	if (!fb || fb->curmode.text)
 	{
-		int ass[][2] = {
-			      {1,0},       {4,0},{5,0},{6,0}, {8,0},{9,0},{10,0},
-			{0,1},      {2,1}, {4,1},             {8,1},
-			{0,2},{1,2},{2,2}, {4,2},{5,2},{6,2}, {8,2},{9,2},{10,2},
-			{0,3},      {2,3},             {6,3},             {10,3},
-			{0,4},      {2,4}, {4,4},{5,4},{6,4}, {8,4},{9,4},{10,4},
-			{-1,-1}
-		};
-		int p;
-		for (p = 0; ass[p][0] != -1; p++)
-		{
-			int x, y;
-			for (y = 0; y < 8; y++)
-				for (x = 0; x < 8; x++)
-				{
-					unsigned long *a =
-						(unsigned long*) fb->fbaddr +
-						((y+ass[p][1]*8) * fb->curmode.xres + ass[p][0]*8 + x);
-                                        *a = 0xFF0000FF;
-				}
-		}
+        	sprintf(statstr, "NetWatch! %08x %08x", smi_status(), counter);
+		strblit(statstr, 0, 0, 0);
 	}
 	
 	eth_poll();
@@ -74,6 +55,9 @@ void smi_entry(void)
 	pci_bother_all();
 	outl(0xCF8, pcisave);
 	outb(0x3D4, vgasave);
+	
+	/* Disable caching on SMRAM again, to prevent the user from whacking us. */
+	WRMSR(0x202, RDMSR(0x202) & ~(0xFFULL));
 }
 
 extern void timer_handler(smi_event_t ev);