csky/mm/syscache.c

8c2ecf20Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0
8c2ecf20Sopenharmony_ci// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
8c2ecf20Sopenharmony_ci
8c2ecf20Sopenharmony_ci#include <linux/syscalls.h>
8c2ecf20Sopenharmony_ci#include <asm/page.h>
8c2ecf20Sopenharmony_ci#include <asm/cacheflush.h>
8c2ecf20Sopenharmony_ci#include <asm/cachectl.h>
8c2ecf20Sopenharmony_ci
8c2ecf20Sopenharmony_ciSYSCALL_DEFINE3(cacheflush,
8c2ecf20Sopenharmony_ci		void __user *, addr,
8c2ecf20Sopenharmony_ci		unsigned long, bytes,
8c2ecf20Sopenharmony_ci		int, cache)
8c2ecf20Sopenharmony_ci{
8c2ecf20Sopenharmony_ci	switch (cache) {
8c2ecf20Sopenharmony_ci	case BCACHE:
8c2ecf20Sopenharmony_ci	case DCACHE:
8c2ecf20Sopenharmony_ci		dcache_wb_range((unsigned long)addr,
8c2ecf20Sopenharmony_ci				(unsigned long)addr + bytes);
8c2ecf20Sopenharmony_ci		if (cache != BCACHE)
8c2ecf20Sopenharmony_ci			break;
8c2ecf20Sopenharmony_ci		fallthrough;
8c2ecf20Sopenharmony_ci	case ICACHE:
8c2ecf20Sopenharmony_ci		flush_icache_mm_range(current->mm,
8c2ecf20Sopenharmony_ci				(unsigned long)addr,
8c2ecf20Sopenharmony_ci				(unsigned long)addr + bytes);
8c2ecf20Sopenharmony_ci		break;
8c2ecf20Sopenharmony_ci	default:
8c2ecf20Sopenharmony_ci		return -EINVAL;
8c2ecf20Sopenharmony_ci	}
8c2ecf20Sopenharmony_ci
8c2ecf20Sopenharmony_ci	return 0;
8c2ecf20Sopenharmony_ci}