v4.19.13 snapshot.
diff --git a/arch/sh/mm/cache-sh2a.c b/arch/sh/mm/cache-sh2a.c
new file mode 100644
index 0000000..ee87d08
--- /dev/null
+++ b/arch/sh/mm/cache-sh2a.c
@@ -0,0 +1,189 @@
+/*
+ * arch/sh/mm/cache-sh2a.c
+ *
+ * Copyright (C) 2008 Yoshinori Sato
+ *
+ * Released under the terms of the GNU GPL v2.0.
+ */
+
+#include <linux/init.h>
+#include <linux/mm.h>
+
+#include <asm/cache.h>
+#include <asm/addrspace.h>
+#include <asm/processor.h>
+#include <asm/cacheflush.h>
+#include <asm/io.h>
+
+/*
+ * The maximum number of pages we support up to when doing ranged dcache
+ * flushing. Anything exceeding this will simply flush the dcache in its
+ * entirety.
+ */
+#define MAX_OCACHE_PAGES 32
+#define MAX_ICACHE_PAGES 32
+
+#ifdef CONFIG_CACHE_WRITEBACK
+static void sh2a_flush_oc_line(unsigned long v, int way)
+{
+ unsigned long addr = (v & 0x000007f0) | (way << 11);
+ unsigned long data;
+
+ data = __raw_readl(CACHE_OC_ADDRESS_ARRAY | addr);
+ if ((data & CACHE_PHYSADDR_MASK) == (v & CACHE_PHYSADDR_MASK)) {
+ data &= ~SH_CACHE_UPDATED;
+ __raw_writel(data, CACHE_OC_ADDRESS_ARRAY | addr);
+ }
+}
+#endif
+
+static void sh2a_invalidate_line(unsigned long cache_addr, unsigned long v)
+{
+ /* Set associative bit to hit all ways */
+ unsigned long addr = (v & 0x000007f0) | SH_CACHE_ASSOC;
+ __raw_writel((addr & CACHE_PHYSADDR_MASK), cache_addr | addr);
+}
+
+/*
+ * Write back the dirty D-caches, but not invalidate them.
+ */
+static void sh2a__flush_wback_region(void *start, int size)
+{
+#ifdef CONFIG_CACHE_WRITEBACK
+ unsigned long v;
+ unsigned long begin, end;
+ unsigned long flags;
+ int nr_ways;
+
+ begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
+ end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
+ & ~(L1_CACHE_BYTES-1);
+ nr_ways = current_cpu_data.dcache.ways;
+
+ local_irq_save(flags);
+ jump_to_uncached();
+
+ /* If there are too many pages then flush the entire cache */
+ if (((end - begin) >> PAGE_SHIFT) >= MAX_OCACHE_PAGES) {
+ begin = CACHE_OC_ADDRESS_ARRAY;
+ end = begin + (nr_ways * current_cpu_data.dcache.way_size);
+
+ for (v = begin; v < end; v += L1_CACHE_BYTES) {
+ unsigned long data = __raw_readl(v);
+ if (data & SH_CACHE_UPDATED)
+ __raw_writel(data & ~SH_CACHE_UPDATED, v);
+ }
+ } else {
+ int way;
+ for (way = 0; way < nr_ways; way++) {
+ for (v = begin; v < end; v += L1_CACHE_BYTES)
+ sh2a_flush_oc_line(v, way);
+ }
+ }
+
+ back_to_cached();
+ local_irq_restore(flags);
+#endif
+}
+
+/*
+ * Write back the dirty D-caches and invalidate them.
+ */
+static void sh2a__flush_purge_region(void *start, int size)
+{
+ unsigned long v;
+ unsigned long begin, end;
+ unsigned long flags;
+
+ begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
+ end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
+ & ~(L1_CACHE_BYTES-1);
+
+ local_irq_save(flags);
+ jump_to_uncached();
+
+ for (v = begin; v < end; v+=L1_CACHE_BYTES) {
+#ifdef CONFIG_CACHE_WRITEBACK
+ int way;
+ int nr_ways = current_cpu_data.dcache.ways;
+ for (way = 0; way < nr_ways; way++)
+ sh2a_flush_oc_line(v, way);
+#endif
+ sh2a_invalidate_line(CACHE_OC_ADDRESS_ARRAY, v);
+ }
+
+ back_to_cached();
+ local_irq_restore(flags);
+}
+
+/*
+ * Invalidate the D-caches, but no write back please
+ */
+static void sh2a__flush_invalidate_region(void *start, int size)
+{
+ unsigned long v;
+ unsigned long begin, end;
+ unsigned long flags;
+
+ begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
+ end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
+ & ~(L1_CACHE_BYTES-1);
+
+ local_irq_save(flags);
+ jump_to_uncached();
+
+ /* If there are too many pages then just blow the cache */
+ if (((end - begin) >> PAGE_SHIFT) >= MAX_OCACHE_PAGES) {
+ __raw_writel(__raw_readl(SH_CCR) | CCR_OCACHE_INVALIDATE,
+ SH_CCR);
+ } else {
+ for (v = begin; v < end; v += L1_CACHE_BYTES)
+ sh2a_invalidate_line(CACHE_OC_ADDRESS_ARRAY, v);
+ }
+
+ back_to_cached();
+ local_irq_restore(flags);
+}
+
+/*
+ * Write back the range of D-cache, and purge the I-cache.
+ */
+static void sh2a_flush_icache_range(void *args)
+{
+ struct flusher_data *data = args;
+ unsigned long start, end;
+ unsigned long v;
+ unsigned long flags;
+
+ start = data->addr1 & ~(L1_CACHE_BYTES-1);
+ end = (data->addr2 + L1_CACHE_BYTES-1) & ~(L1_CACHE_BYTES-1);
+
+#ifdef CONFIG_CACHE_WRITEBACK
+ sh2a__flush_wback_region((void *)start, end-start);
+#endif
+
+ local_irq_save(flags);
+ jump_to_uncached();
+
+ /* I-Cache invalidate */
+ /* If there are too many pages then just blow the cache */
+ if (((end - start) >> PAGE_SHIFT) >= MAX_ICACHE_PAGES) {
+ __raw_writel(__raw_readl(SH_CCR) | CCR_ICACHE_INVALIDATE,
+ SH_CCR);
+ } else {
+ for (v = start; v < end; v += L1_CACHE_BYTES)
+ sh2a_invalidate_line(CACHE_IC_ADDRESS_ARRAY, v);
+ }
+
+ back_to_cached();
+ local_irq_restore(flags);
+}
+
+void __init sh2a_cache_init(void)
+{
+ local_flush_icache_range = sh2a_flush_icache_range;
+
+ __flush_wback_region = sh2a__flush_wback_region;
+ __flush_purge_region = sh2a__flush_purge_region;
+ __flush_invalidate_region = sh2a__flush_invalidate_region;
+}