Initial. Don't... just don't ask.

kernel/svgalib_helper/i810.c

@@ -0,0 +1,66 @@
+/* vram size in pages */
+
+#ifdef __386__
+
+#include <linux/version.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>   /* cli(), *_flags */
+#include <asm/segment.h>  /* memcpy and such */
+#include <asm/io.h>
+#include <asm/pgtable.h>
+
+#define I810_SIZE 1024
+
+unsigned long i810_alloc_page()
+{
+	unsigned long address;
+
+	address = __get_free_page(GFP_KERNEL);
+	if(address == 0UL)
+		return 0;
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
+	atomic_inc(&virt_to_page(address)->count);
+	set_bit(PG_locked, &virt_to_page(address)->flags);
+#endif
+	return address;
+}
+
+#if 0
+static void i810_free_page(unsigned long page)
+{
+	if(page == 0UL)
+		return;
+
+	atomic_dec(&virt_to_page(page)->count);
+	clear_bit(PG_locked, &virt_to_page(page)->flags);
+	wake_up(&virt_to_page(page)->wait);
+	free_page(page);
+	return;
+}
+#endif
+
+static unsigned long i810_pages[I810_SIZE];
+unsigned long i810_gttes[I810_SIZE];
+static unsigned long i810_gttpage=0;
+
+unsigned int i810_make_gtt() {
+	int i;
+        
+        if(i810_gttpage) return virt_to_bus((void *)i810_gttpage);
+        
+	i810_gttpage=i810_alloc_page();
+	
+	for(i=0;i<I810_SIZE;i++) {
+            	unsigned int gtte;
+		i810_pages[i]=i810_alloc_page();
+                gtte=virt_to_bus((void *)i810_pages[i]);
+                gtte &= 0x3ffff000;
+                gtte |= 1; /* valid, system memory, not cached */
+                i810_gttes[i]=gtte;
+	}
+
+        return virt_to_bus((void *)i810_gttpage);
+}
+
+#endif