[coreboot] [PATCH] Warn if we run out of MTRRs

[Carl-Daniel Hailfinger]

Print a loud warning message if we run out of MTRRs.

Signed-off-by: Carl-Daniel Hailfinger

==================================================================
--- corebootv2/src/cpu/x86/mtrr/mtrr.c	(revision 3935)
+++ corebootv2/src/cpu/x86/mtrr/mtrr.c	(working copy)
@@ -228,9 +228,14 @@
    unsigned long range_startk, unsigned long range_sizek,
    unsigned long next_range_startk, unsigned char type, unsigned address_bits)
 {
-	if (!range_sizek || (reg >= BIOS_MTRRS)) {
+	if (!range_sizek) {
+		printk_debug("range_to_mtrr called for empty range\n");
    	return reg;
    }
+	if (reg >= BIOS_MTRRS) {
+		printk_emerg("Running out of variable MTRRs!\n");
+		return reg;
+	}
    while(range_sizek) {
    	unsigned long max_align, align;
    	unsigned long sizek;
@@ -249,8 +254,10 @@
    	set_var_mtrr(reg++, range_startk, sizek, type, address_bits);
    	range_startk += sizek;
    	range_sizek -= sizek;
-		if (reg >= BIOS_MTRRS)
+		if (reg >= BIOS_MTRRS) {
+			printk_emerg("Running out of variable MTRRs!\n");
    		break;
+		}
    }
    return reg;
 }