diff options
Diffstat (limited to 'arch/arm/mm/init.c')
| -rw-r--r-- | arch/arm/mm/init.c | 28 |
1 files changed, 20 insertions, 8 deletions
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index be0b42937888..16d373d587c4 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> @@ -24,6 +21,7 @@ #include <linux/dma-contiguous.h> #include <linux/sizes.h> #include <linux/stop_machine.h> +#include <linux/swiotlb.h> #include <asm/cp15.h> #include <asm/mach-types.h> @@ -242,6 +240,22 @@ 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. */ @@ -450,10 +464,8 @@ 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; +#ifdef CONFIG_ARM_LPAE + swiotlb_init(1); #endif set_max_mapnr(pfn_to_page(max_pfn) - mem_map); |