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-rw-r--r--arch/arm/mm/init.c27
1 files changed, 17 insertions, 10 deletions
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index be0b42937888..4920a206dce9 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -1,11 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* linux/arch/arm/mm/init.c
*
* Copyright (C) 1995-2005 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/errno.h>
@@ -242,6 +239,22 @@ static void __init arm_initrd_init(void)
#endif
}
+#ifdef CONFIG_CPU_ICACHE_MISMATCH_WORKAROUND
+void check_cpu_icache_size(int cpuid)
+{
+ u32 size, ctr;
+
+ asm("mrc p15, 0, %0, c0, c0, 1" : "=r" (ctr));
+
+ size = 1 << ((ctr & 0xf) + 2);
+ if (cpuid != 0 && icache_size != size)
+ pr_info("CPU%u: detected I-Cache line size mismatch, workaround enabled\n",
+ cpuid);
+ if (icache_size > size)
+ icache_size = size;
+}
+#endif
+
void __init arm_memblock_init(const struct machine_desc *mdesc)
{
/* Register the kernel text, kernel data and initrd with memblock. */
@@ -450,12 +463,6 @@ static void __init free_highpages(void)
*/
void __init mem_init(void)
{
-#ifdef CONFIG_HAVE_TCM
- /* These pointers are filled in on TCM detection */
- extern u32 dtcm_end;
- extern u32 itcm_end;
-#endif
-
set_max_mapnr(pfn_to_page(max_pfn) - mem_map);
/* this will put all unused low memory onto the freelists */