intel/cpu: Switch older models to TSC_MONOTONIC_TIMER

The implementation of udelay() with LAPIC timers
existed first, as we did not have calculations
implemented for TSC frequency.

Change-Id: If510bcaadee67e3a5792b3fc7389353b672712f9
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34200
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

2 files changed, 0 insertions, 68 deletions

diff --git a/src/northbridge/intel/fsp_rangeley/Makefile.inc b/src/northbridge/intel/fsp_rangeley/Makefile.inc
index a2f80546d7..a167c2369e 100644
--- a/src/northbridge/intel/fsp_rangeley/Makefile.inc
+++ b/src/northbridge/intel/fsp_rangeley/Makefile.inc
@@ -27,8 +27,6 @@ romstage-y += memmap.c
 romstage-y += ../../../arch/x86/walkcbfs.S
 romstage-y += port_access.c
 
-smm-y += udelay.c
-
 CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)
 
 CPPFLAGS_common += -I$(src)/northbridge/intel/fsp_rangeley/
diff --git a/src/northbridge/intel/fsp_rangeley/udelay.c b/src/northbridge/intel/fsp_rangeley/udelay.c
deleted file mode 100644
index 08301a37f6..0000000000
--- a/src/northbridge/intel/fsp_rangeley/udelay.c
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2007-2008 coresystems GmbH
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#include <delay.h>
-#include <stdint.h>
-#include <cpu/x86/tsc.h>
-#include <cpu/x86/msr.h>
-
-#define MSR_PLATFORM_INFO 0xce
-
-/**
- * Intel Rangeley CPUs always run the TSC at BCLK = 100MHz
- */
-
-/* Simple 32- to 64-bit multiplication. Uses 16-bit words to avoid overflow.
- * This code is used to prevent use of libgcc's umoddi3.
- */
-static inline void multiply_to_tsc(tsc_t *const tsc, const u32 a, const u32 b)
-{
-	tsc->lo = (a & 0xffff) * (b & 0xffff);
-	tsc->hi = ((tsc->lo >> 16)
-		+ ((a & 0xffff) * (b >> 16))
-		+ ((b & 0xffff) * (a >> 16)));
-	tsc->lo = ((tsc->hi & 0xffff) << 16) | (tsc->lo & 0xffff);
-	tsc->hi = ((a >> 16) * (b >> 16)) + (tsc->hi >> 16);
-}
-
-void udelay(u32 us)
-{
-	u32 dword;
-	tsc_t tsc, tsc1, tscd;
-	msr_t msr;
-	u32 fsb = 100, divisor;
-	u32 d;			/* ticks per us */
-
-	msr = rdmsr(MSR_PLATFORM_INFO);
-	divisor = (msr.lo >> 8) & 0xff;
-
-	d = fsb * divisor;
-	multiply_to_tsc(&tscd, us, d);
-
-	tsc1 = rdtsc();
-	dword = tsc1.lo + tscd.lo;
-	if ((dword < tsc1.lo) || (dword < tscd.lo)) {
-		tsc1.hi++;
-	}
-	tsc1.lo = dword;
-	tsc1.hi += tscd.hi;
-
-	do {
-		tsc = rdtsc();
-	} while ((tsc.hi < tsc1.hi)
-		 || ((tsc.hi == tsc1.hi) && (tsc.lo <= tsc1.lo)));
-}