Remove MIPS architecture

The MIPS architecture port has been added 5+ years ago in order to
support a Chrome OS project that ended up going nowhere. No other board
has used it since and nobody is still willing or has the expertise and
hardware to maintain it. We have decided that it has become too much of
a mainenance burden and the chance of anyone ever reviving it seems too
slim at this point. This patch eliminates all MIPS code and
MIPS-specific hacks.

Change-Id: I5e49451cd055bbab0a15dcae5f53e0172e6e2ebe
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34919
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

2 files changed, 0 insertions, 145 deletions

diff --git a/payloads/libpayload/libc/64bit_div.c b/payloads/libpayload/libc/64bit_div.c
deleted file mode 100644
index 5cd5bc5e95..0000000000
--- a/payloads/libpayload/libc/64bit_div.c
+++ /dev/null
@@ -1,141 +0,0 @@
-/*
- * This file is part of the libpayload project.
- *
- * Copyright 2014 Google Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <libpayload-config.h>
-#include <stdlib.h>
-
-#if !CONFIG(LP_LITTLE_ENDIAN)
-#error this code is for little endian only
-#endif
-
-union overlay64 {
-	uint64_t longw;
-	struct {
-		uint32_t lower;
-		uint32_t higher;
-	} words;
-};
-
-
-uint64_t __ashldi3(uint64_t num, unsigned shift)
-{
-	union overlay64 output;
-
-	output.longw = num;
-	if (shift >= 32) {
-		output.words.higher = output.words.lower << (shift - 32);
-		output.words.lower = 0;
-	} else {
-		if (!shift)
-			return num;
-		output.words.higher = (output.words.higher << shift) |
-			(output.words.lower >> (32 - shift));
-		output.words.lower = output.words.lower << shift;
-	}
-	return output.longw;
-}
-
-uint64_t __lshrdi3(uint64_t num, unsigned shift)
-{
-	union overlay64 output;
-
-	output.longw = num;
-	if (shift >= 32) {
-		output.words.lower = output.words.higher >> (shift - 32);
-		output.words.higher = 0;
-	} else {
-		if (!shift)
-			return num;
-		output.words.lower = output.words.lower >> shift |
-			(output.words.higher << (32 - shift));
-		output.words.higher = output.words.higher >> shift;
-	}
-	return output.longw;
-}
-
-#define MAX_32BIT_UINT ((((uint64_t)1) << 32) - 1)
-
-static uint64_t _64bit_divide(uint64_t dividend,
-			      uint64_t divider, uint64_t *rem_p)
-{
-	uint64_t result = 0;
-
-	/*
-	 * If divider is zero - let the rest of the system care about the
-	 * exception.
-	 */
-	if (!divider)
-		return 1/(uint32_t)divider;
-
-	/* As an optimization, let's not use 64 bit division unless we must. */
-	if (dividend <= MAX_32BIT_UINT) {
-		if (divider > MAX_32BIT_UINT) {
-			result = 0;
-			if (rem_p)
-				*rem_p = divider;
-		} else {
-			result = (uint32_t) dividend / (uint32_t) divider;
-			if (rem_p)
-				*rem_p = (uint32_t) dividend %
-					(uint32_t) divider;
-		}
-		return result;
-	}
-
-	while (divider <= dividend) {
-		uint64_t locald = divider;
-		uint64_t limit = __lshrdi3(dividend, 1);
-		int shifts = 0;
-
-		while (locald <= limit) {
-			shifts++;
-			locald = locald + locald;
-		}
-		result |= __ashldi3(1, shifts);
-		dividend -= locald;
-	}
-
-	if (rem_p)
-		*rem_p = dividend;
-
-	return result;
-}
-
-uint64_t __udivdi3(uint64_t num, uint64_t den)
-{
-	return _64bit_divide(num, den, NULL);
-}
-
-uint64_t __umoddi3(uint64_t num, uint64_t den)
-{
-	uint64_t v = 0;
-
-	_64bit_divide(num, den, &v);
-	return v;
-}
diff --git a/payloads/libpayload/libc/Makefile.inc b/payloads/libpayload/libc/Makefile.inc
index edef62cc4d..348dc117ea 100644
--- a/payloads/libpayload/libc/Makefile.inc
+++ b/payloads/libpayload/libc/Makefile.inc
@@ -39,7 +39,3 @@ libc-$(CONFIG_LP_LIBC) += hexdump.c
 libc-$(CONFIG_LP_LIBC) += die.c
 libc-$(CONFIG_LP_LIBC) += coreboot.c
 libc-$(CONFIG_LP_LIBC) += fmap.c
-
-ifeq ($(CONFIG_LP_ARCH_MIPS),y)
-libc-$(CONFIG_LP_LIBC) += 64bit_div.c
-endif