// SPDX-License-Identifier: GPL-2.0-only
/*
 * Cache management functions for Hexagon
 *
 * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
 */

#include <linux/mm.h>
#include <asm/cacheflush.h>
#include <asm/hexagon_vm.h>

#define spanlines(start, end) \
        (((end - (start & ~(LINESIZE - 1))) >> LINEBITS) + 1)

void flush_dcache_range(unsigned long start, unsigned long end)
{
        unsigned long lines = spanlines(start, end-1);
        unsigned long i, flags;

        start &= ~(LINESIZE - 1);

        local_irq_save(flags);

        for (i = 0; i < lines; i++) {
                __asm__ __volatile__ (
                "       dccleaninva(%0);        "
                :
                : "r" (start)
                );
                start += LINESIZE;
        }
        local_irq_restore(flags);
}

void flush_icache_range(unsigned long start, unsigned long end)
{
        unsigned long lines = spanlines(start, end-1);
        unsigned long i, flags;

        start &= ~(LINESIZE - 1);

        local_irq_save(flags);

        for (i = 0; i < lines; i++) {
                __asm__ __volatile__ (
                        "       dccleana(%0); "
                        "       icinva(%0);     "
                        :
                        : "r" (start)
                );
                start += LINESIZE;
        }
        __asm__ __volatile__ (
                "isync"
        );
        local_irq_restore(flags);
}
EXPORT_SYMBOL(flush_icache_range);

void hexagon_clean_dcache_range(unsigned long start, unsigned long end)
{
        unsigned long lines = spanlines(start, end-1);
        unsigned long i, flags;

        start &= ~(LINESIZE - 1);

        local_irq_save(flags);

        for (i = 0; i < lines; i++) {
                __asm__ __volatile__ (
                "       dccleana(%0);   "
                :
                : "r" (start)
                );
                start += LINESIZE;
        }
        local_irq_restore(flags);
}

void hexagon_inv_dcache_range(unsigned long start, unsigned long end)
{
        unsigned long lines = spanlines(start, end-1);
        unsigned long i, flags;

        start &= ~(LINESIZE - 1);

        local_irq_save(flags);

        for (i = 0; i < lines; i++) {
                __asm__ __volatile__ (
                "       dcinva(%0);     "
                :
                : "r" (start)
                );
                start += LINESIZE;
        }
        local_irq_restore(flags);
}




/*
 * This is just really brutal and shouldn't be used anyways,
 * especially on V2.  Left here just in case.
 */
void flush_cache_all_hexagon(void)
{
        unsigned long flags;
        local_irq_save(flags);
        __vmcache_ickill();
        __vmcache_dckill();
        __vmcache_l2kill();
        local_irq_restore(flags);
        mb();
}

void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
                       unsigned long vaddr, void *dst, void *src, int len)
{
        memcpy(dst, src, len);
        if (vma->vm_flags & VM_EXEC) {
                flush_icache_range((unsigned long) dst,
                (unsigned long) dst + len);
        }
}