u-boot/arch/arm/mach-tegra/tegra186/cache.c

/*
 * Copyright (c) 2016, NVIDIA CORPORATION.
 *
 * SPDX-License-Identifier: GPL-2.0
 */

#include <common.h>
#include <asm/system.h>

#define SMC_SIP_INVOKE_MCE	0x82FFFF00
#define MCE_SMC_ROC_FLUSH_CACHE	11

int __asm_flush_l3_cache(void)
{
	struct pt_regs regs = {0};

	isb();

	regs.regs[0] = SMC_SIP_INVOKE_MCE | MCE_SMC_ROC_FLUSH_CACHE;
	smc_call(&regs);

	return 0;
}
ARM: tegra: flush caches via SMC call On Tegra186, it is necessary to perform an SMC to fully flush all caches; flushing/cleaning by set/way is not enough. Implement the required hook to make this happen. Signed-off-by: Stephen Warren <swarren@nvidia.com> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Warren <twarren@nvidia.com> 8 years ago			`/*`
			`* Copyright (c) 2016, NVIDIA CORPORATION.`
			`*`
			`* SPDX-License-Identifier: GPL-2.0`
			`*/`

			`#include <common.h>`
			`#include <asm/system.h>`

			`#define SMC_SIP_INVOKE_MCE 0x82FFFF00`
			`#define MCE_SMC_ROC_FLUSH_CACHE 11`

			`int __asm_flush_l3_cache(void)`
			`{`
			`struct pt_regs regs = {0};`

			`isb();`

			`regs.regs[0] = SMC_SIP_INVOKE_MCE \| MCE_SMC_ROC_FLUSH_CACHE;`
			`smc_call(&regs);`

			`return 0;`
			`}`