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- /*
- * Cache management functions for Hexagon
- *
- * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- */
- #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);
- }
- }
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