1 files changed, 107 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/swift.h b/arch/sparc/include/asm/swift.h
new file mode 100644
index 0000000000..96f6526b96
--- /dev/null
+++ b/arch/sparc/include/asm/swift.h
@@ -0,0 +1,107 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* swift.h: Specific definitions for the _broken_ Swift SRMMU
+ *          MMU module.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#ifndef _SPARC_SWIFT_H
+#define _SPARC_SWIFT_H
+
+/* Swift is so brain damaged, here is the mmu control register. */
+#define SWIFT_ST       0x00800000   /* SW tablewalk enable */
+#define SWIFT_WP       0x00400000   /* Watchpoint enable   */
+
+/* Branch folding (buggy, disable on production systems!)  */
+#define SWIFT_BF       0x00200000
+#define SWIFT_PMC      0x00180000   /* Page mode control   */
+#define SWIFT_PE       0x00040000   /* Parity enable       */
+#define SWIFT_PC       0x00020000   /* Parity control      */
+#define SWIFT_AP       0x00010000   /* Graphics page mode control (TCX/SX) */
+#define SWIFT_AC       0x00008000   /* Alternate Cacheability (see viking.h) */
+#define SWIFT_BM       0x00004000   /* Boot mode */
+#define SWIFT_RC       0x00003c00   /* DRAM refresh control */
+#define SWIFT_IE       0x00000200   /* Instruction cache enable */
+#define SWIFT_DE       0x00000100   /* Data cache enable */
+#define SWIFT_SA       0x00000080   /* Store Allocate */
+#define SWIFT_NF       0x00000002   /* No fault mode */
+#define SWIFT_EN       0x00000001   /* MMU enable */
+
+/* Bits [13:5] select one of 512 instruction cache tags */
+static inline void swift_inv_insn_tag(unsigned long addr)
+{
+	__asm__ __volatile__("sta %%g0, [%0] %1\n\t"
+			     : /* no outputs */
+			     : "r" (addr), "i" (ASI_M_TXTC_TAG)
+			     : "memory");
+}
+
+/* Bits [12:4] select one of 512 data cache tags */
+static inline void swift_inv_data_tag(unsigned long addr)
+{
+	__asm__ __volatile__("sta %%g0, [%0] %1\n\t"
+			     : /* no outputs */
+			     : "r" (addr), "i" (ASI_M_DATAC_TAG)
+			     : "memory");
+}
+
+static inline void swift_flush_dcache(void)
+{
+	unsigned long addr;
+
+	for (addr = 0; addr < 0x2000; addr += 0x10)
+		swift_inv_data_tag(addr);
+}
+
+static inline void swift_flush_icache(void)
+{
+	unsigned long addr;
+
+	for (addr = 0; addr < 0x4000; addr += 0x20)
+		swift_inv_insn_tag(addr);
+}
+
+static inline void swift_idflash_clear(void)
+{
+	unsigned long addr;
+
+	for (addr = 0; addr < 0x2000; addr += 0x10) {
+		swift_inv_insn_tag(addr<<1);
+		swift_inv_data_tag(addr);
+	}
+}
+
+/* Swift is so broken, it isn't even safe to use the following. */
+static inline void swift_flush_page(unsigned long page)
+{
+	__asm__ __volatile__("sta %%g0, [%0] %1\n\t"
+			     : /* no outputs */
+			     : "r" (page), "i" (ASI_M_FLUSH_PAGE)
+			     : "memory");
+}
+
+static inline void swift_flush_segment(unsigned long addr)
+{
+	__asm__ __volatile__("sta %%g0, [%0] %1\n\t"
+			     : /* no outputs */
+			     : "r" (addr), "i" (ASI_M_FLUSH_SEG)
+			     : "memory");
+}
+
+static inline void swift_flush_region(unsigned long addr)
+{
+	__asm__ __volatile__("sta %%g0, [%0] %1\n\t"
+			     : /* no outputs */
+			     : "r" (addr), "i" (ASI_M_FLUSH_REGION)
+			     : "memory");
+}
+
+static inline void swift_flush_context(void)
+{
+	__asm__ __volatile__("sta %%g0, [%%g0] %0\n\t"
+			     : /* no outputs */
+			     : "i" (ASI_M_FLUSH_CTX)
+			     : "memory");
+}
+
+#endif /* !(_SPARC_SWIFT_H) */