1 files changed, 114 insertions, 0 deletions
diff --git a/arch/mips/include/asm/cacheops.h b/arch/mips/include/asm/cacheops.h
new file mode 100644
index 0000000..98b67cc
--- /dev/null
+++ b/arch/mips/include/asm/cacheops.h
@@ -0,0 +1,114 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Cache operations for the cache instruction.
+ *
+ * (C) Copyright 1996, 97, 99, 2002, 03 Ralf Baechle
+ * (C) Copyright 1999 Silicon Graphics, Inc.
+ */
+#ifndef	__ASM_CACHEOPS_H
+#define	__ASM_CACHEOPS_H
+
+#ifndef __ASSEMBLY__
+
+static inline void mips_cache(int op, const volatile void *addr)
+{
+#ifdef __GCC_HAVE_BUILTIN_MIPS_CACHE
+	__builtin_mips_cache(op, addr);
+#else
+	__asm__ __volatile__("cache %0, 0(%1)" : : "i"(op), "r"(addr));
+#endif
+}
+
+#define MIPS32_WHICH_ICACHE                    0x0
+#define MIPS32_FETCH_AND_LOCK                  0x7
+
+#define ICACHE_LOAD_LOCK (MIPS32_WHICH_ICACHE | (MIPS32_FETCH_AND_LOCK << 2))
+
+/* Prefetch and lock instructions into cache */
+static inline void icache_lock(void *func, size_t len)
+{
+	int i, lines = ((len - 1) / ARCH_DMA_MINALIGN) + 1;
+
+	for (i = 0; i < lines; i++) {
+		asm volatile (" cache %0, %1(%2)"
+			      : /* No Output */
+			      : "I" ICACHE_LOAD_LOCK,
+				"n" (i * ARCH_DMA_MINALIGN),
+				"r" (func)
+			      : /* No Clobbers */);
+	}
+}
+#endif /* !__ASSEMBLY__ */
+
+/*
+ * Cache Operations available on all MIPS processors with R4000-style caches
+ */
+#define INDEX_INVALIDATE_I      0x00
+#define INDEX_WRITEBACK_INV_D   0x01
+#define INDEX_LOAD_TAG_I	0x04
+#define INDEX_LOAD_TAG_D	0x05
+#define INDEX_STORE_TAG_I	0x08
+#define INDEX_STORE_TAG_D	0x09
+#if defined(CONFIG_CPU_LOONGSON2)
+#define HIT_INVALIDATE_I	0x00
+#else
+#define HIT_INVALIDATE_I	0x10
+#endif
+#define HIT_INVALIDATE_D	0x11
+#define HIT_WRITEBACK_INV_D	0x15
+
+/*
+ * R4000-specific cacheops
+ */
+#define CREATE_DIRTY_EXCL_D	0x0d
+#define FILL			0x14
+#define HIT_WRITEBACK_I		0x18
+#define HIT_WRITEBACK_D		0x19
+
+/*
+ * R4000SC and R4400SC-specific cacheops
+ */
+#define INDEX_INVALIDATE_SI     0x02
+#define INDEX_WRITEBACK_INV_SD  0x03
+#define INDEX_LOAD_TAG_SI	0x06
+#define INDEX_LOAD_TAG_SD	0x07
+#define INDEX_STORE_TAG_SI	0x0A
+#define INDEX_STORE_TAG_SD	0x0B
+#define CREATE_DIRTY_EXCL_SD	0x0f
+#define HIT_INVALIDATE_SI	0x12
+#define HIT_INVALIDATE_SD	0x13
+#define HIT_WRITEBACK_INV_SD	0x17
+#define HIT_WRITEBACK_SD	0x1b
+#define HIT_SET_VIRTUAL_SI	0x1e
+#define HIT_SET_VIRTUAL_SD	0x1f
+
+/*
+ * R5000-specific cacheops
+ */
+#define R5K_PAGE_INVALIDATE_S	0x17
+
+/*
+ * RM7000-specific cacheops
+ */
+#define PAGE_INVALIDATE_T	0x16
+
+/*
+ * R10000-specific cacheops
+ *
+ * Cacheops 0x02, 0x06, 0x0a, 0x0c-0x0e, 0x16, 0x1a and 0x1e are unused.
+ * Most of the _S cacheops are identical to the R4000SC _SD cacheops.
+ */
+#define INDEX_WRITEBACK_INV_S	0x03
+#define INDEX_LOAD_TAG_S	0x07
+#define INDEX_STORE_TAG_S	0x0B
+#define HIT_INVALIDATE_S	0x13
+#define CACHE_BARRIER		0x14
+#define HIT_WRITEBACK_INV_S	0x17
+#define INDEX_LOAD_DATA_I	0x18
+#define INDEX_LOAD_DATA_D	0x19
+#define INDEX_LOAD_DATA_S	0x1b
+#define INDEX_STORE_DATA_I	0x1c
+#define INDEX_STORE_DATA_D	0x1d
+#define INDEX_STORE_DATA_S	0x1f
+
+#endif	/* __ASM_CACHEOPS_H */