nb/intel/haswell/gma.c: Drop unused set_translation_table function

Change-Id: I6c65a5a74a83b8da299245fd6f4a7ae7c1ed30c3
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46692
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/northbridge/intel/haswell/gma.c

@@ -120,47 +120,6 @@ u32 map_oprom_vendev(u32 vendev)
 	return new_vendev;
 }
 
-/** FIXME: Seems to be outdated. */
-/*
- * GTT is the Global Translation Table for the graphics pipeline. It is used to translate
- * graphics addresses to physical memory addresses. As in the CPU, GTTs map 4K pages.
- *
- * The setgtt function adds a further bit of flexibility: it allows you to set a range (the
- * first two parameters) to point to a physical address (third parameter); the physical address
- * is incremented by a count (fourth parameter) for each GTT in the range.
- *
- * Why do it this way? For ultrafast startup, we can point all the GTT entries to point to one
- * page, and set that page to 0s:
- *
- *   memset(physbase, 0, 4096);
- *   setgtt(0, 4250, physbase, 0);
- *
- * this takes about 2 ms, and is a win because zeroing the page takes up to 200 ms.
- *
- * This call sets the GTT to point to a linear range of pages starting at physbase.
- */
-
-#define GTT_PTE_BASE (2 << 20)
-
-void set_translation_table(int start, int end, u64 base, int inc)
-{
-	int i;
-
-	for (i = start; i < end; i++){
-		u64 physical_address = base + i * inc;
-
-		/* swizzle the 32:39 bits to 4:11 */
-		u32 word = physical_address | ((physical_address >> 28) & 0xff0) | 1;
-
-		/*
-		 * Note: we've confirmed by checking the values that MRC does no useful
-		 * setup before we run this.
-		 */
-		gtt_write(GTT_PTE_BASE + i * 4, word);
-		gtt_read(GTT_PTE_BASE + i * 4);
-	}
-}
-
 static struct resource *gtt_res = NULL;
 
 u32 gtt_read(u32 reg)

src/northbridge/intel/haswell/haswell.h

@@ -90,7 +90,6 @@ void mb_late_romstage_setup(void); /* optional */
 
 void haswell_early_initialization(void);
 void haswell_late_initialization(void);
-void set_translation_table(int start, int end, u64 base, int inc);
 void haswell_unhide_peg(void);
 
 void report_platform_info(void);