1 files changed, 107 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/cache.h b/arch/powerpc/include/asm/cache.h
new file mode 100644
index 000000000..66298461b
--- /dev/null
+++ b/arch/powerpc/include/asm/cache.h
@@ -0,0 +1,107 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_POWERPC_CACHE_H
+#define _ASM_POWERPC_CACHE_H
+
+#ifdef __KERNEL__
+
+
+/* bytes per L1 cache line */
+#if defined(CONFIG_PPC_8xx) || defined(CONFIG_403GCX)
+#define L1_CACHE_SHIFT		4
+#define MAX_COPY_PREFETCH	1
+#define IFETCH_ALIGN_SHIFT	2
+#elif defined(CONFIG_PPC_E500MC)
+#define L1_CACHE_SHIFT		6
+#define MAX_COPY_PREFETCH	4
+#define IFETCH_ALIGN_SHIFT	3
+#elif defined(CONFIG_PPC32)
+#define MAX_COPY_PREFETCH	4
+#define IFETCH_ALIGN_SHIFT	3	/* 603 fetches 2 insn at a time */
+#if defined(CONFIG_PPC_47x)
+#define L1_CACHE_SHIFT		7
+#else
+#define L1_CACHE_SHIFT		5
+#endif
+#else /* CONFIG_PPC64 */
+#define L1_CACHE_SHIFT		7
+#define IFETCH_ALIGN_SHIFT	4 /* POWER8,9 */
+#endif
+
+#define	L1_CACHE_BYTES		(1 << L1_CACHE_SHIFT)
+
+#define	SMP_CACHE_BYTES		L1_CACHE_BYTES
+
+#define IFETCH_ALIGN_BYTES	(1 << IFETCH_ALIGN_SHIFT)
+
+#if defined(__powerpc64__) && !defined(__ASSEMBLY__)
+
+struct ppc_cache_info {
+	u32 size;
+	u32 line_size;
+	u32 block_size;	/* L1 only */
+	u32 log_block_size;
+	u32 blocks_per_page;
+	u32 sets;
+	u32 assoc;
+};
+
+struct ppc64_caches {
+	struct ppc_cache_info l1d;
+	struct ppc_cache_info l1i;
+	struct ppc_cache_info l2;
+	struct ppc_cache_info l3;
+};
+
+extern struct ppc64_caches ppc64_caches;
+#endif /* __powerpc64__ && ! __ASSEMBLY__ */
+
+#if defined(__ASSEMBLY__)
+/*
+ * For a snooping icache, we still need a dummy icbi to purge all the
+ * prefetched instructions from the ifetch buffers. We also need a sync
+ * before the icbi to order the the actual stores to memory that might
+ * have modified instructions with the icbi.
+ */
+#define PURGE_PREFETCHED_INS	\
+	sync;			\
+	icbi	0,r3;		\
+	sync;			\
+	isync
+
+#else
+#define __read_mostly __attribute__((__section__(".data..read_mostly")))
+
+#ifdef CONFIG_6xx
+extern long _get_L2CR(void);
+extern long _get_L3CR(void);
+extern void _set_L2CR(unsigned long);
+extern void _set_L3CR(unsigned long);
+#else
+#define _get_L2CR()	0L
+#define _get_L3CR()	0L
+#define _set_L2CR(val)	do { } while(0)
+#define _set_L3CR(val)	do { } while(0)
+#endif
+
+static inline void dcbz(void *addr)
+{
+	__asm__ __volatile__ ("dcbz 0, %0" : : "r"(addr) : "memory");
+}
+
+static inline void dcbi(void *addr)
+{
+	__asm__ __volatile__ ("dcbi 0, %0" : : "r"(addr) : "memory");
+}
+
+static inline void dcbf(void *addr)
+{
+	__asm__ __volatile__ ("dcbf 0, %0" : : "r"(addr) : "memory");
+}
+
+static inline void dcbst(void *addr)
+{
+	__asm__ __volatile__ ("dcbst 0, %0" : : "r"(addr) : "memory");
+}
+#endif /* !__ASSEMBLY__ */
+#endif /* __KERNEL__ */
+#endif /* _ASM_POWERPC_CACHE_H */