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-rw-r--r--arch/hexagon/mm/cache.c126
1 files changed, 126 insertions, 0 deletions
diff --git a/arch/hexagon/mm/cache.c b/arch/hexagon/mm/cache.c
new file mode 100644
index 000000000..7e46f40c8
--- /dev/null
+++ b/arch/hexagon/mm/cache.c
@@ -0,0 +1,126 @@
+// 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);
+ }
+}