From 71d2c07028ce87d3aeca4e1220fb6dcbfd7bb22f Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime.ripard@free-electrons.com>
Date: Mon, 27 Feb 2017 18:22:01 +0100
Subject: [PATCH] bch: Allow to build for the host

We will need the bch functions in the tool to generate the SPL images for
the Allwinner SoCs.

Do the needed adjustments so that we can use it on the host.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
---
 lib/bch.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/lib/bch.c b/lib/bch.c
index 147715afd0..ec53483774 100644
--- a/lib/bch.c
+++ b/lib/bch.c
@@ -54,10 +54,27 @@
  * finite fields GF(2^q). In Rapport de recherche INRIA no 2829, 1996.
  */
 
+#ifndef USE_HOSTCC
 #include <common.h>
 #include <ubi_uboot.h>
 
 #include <linux/bitops.h>
+#else
+#include <errno.h>
+#include <endian.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#undef cpu_to_be32
+#define cpu_to_be32 htobe32
+#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
+#define kmalloc(size, flags)	malloc(size)
+#define kzalloc(size, flags)	calloc(1, size)
+#define kfree free
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+#endif
+
 #include <asm/byteorder.h>
 #include <linux/bch.h>
 
@@ -95,6 +112,37 @@ struct gf_poly_deg1 {
 	unsigned int   c[2];
 };
 
+#ifdef USE_HOSTCC
+static int fls(int x)
+{
+	int r = 32;
+
+	if (!x)
+		return 0;
+	if (!(x & 0xffff0000u)) {
+		x <<= 16;
+		r -= 16;
+	}
+	if (!(x & 0xff000000u)) {
+		x <<= 8;
+		r -= 8;
+	}
+	if (!(x & 0xf0000000u)) {
+		x <<= 4;
+		r -= 4;
+	}
+	if (!(x & 0xc0000000u)) {
+		x <<= 2;
+		r -= 2;
+	}
+	if (!(x & 0x80000000u)) {
+		x <<= 1;
+		r -= 1;
+	}
+	return r;
+}
+#endif
+
 /*
  * same as encode_bch(), but process input data one byte at a time
  */
-- 
2.25.1