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-rw-r--r--arch/mips/include/asm/ginvt.h59
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/mips/include/asm/ginvt.h b/arch/mips/include/asm/ginvt.h
new file mode 100644
index 000000000..87b2974ff
--- /dev/null
+++ b/arch/mips/include/asm/ginvt.h
@@ -0,0 +1,59 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __MIPS_ASM_GINVT_H__
+#define __MIPS_ASM_GINVT_H__
+
+#include <asm/mipsregs.h>
+
+enum ginvt_type {
+ GINVT_FULL,
+ GINVT_VA,
+ GINVT_MMID,
+};
+
+#ifdef TOOLCHAIN_SUPPORTS_GINV
+# define _ASM_SET_GINV ".set ginv\n"
+# define _ASM_UNSET_GINV
+#else
+# define _ASM_SET_GINV \
+ _ASM_MACRO_1R1I(ginvt, rs, type, \
+ _ASM_INSN_IF_MIPS(0x7c0000bd | (__rs << 21) | (\\type << 8)) \
+ _ASM_INSN32_IF_MM(0x0000717c | (__rs << 16) | (\\type << 9)))
+# define _ASM_UNSET_GINV ".purgem ginvt\n"
+#endif
+
+static __always_inline void ginvt(unsigned long addr, enum ginvt_type type)
+{
+ asm volatile(
+ ".set push\n"
+ _ASM_SET_GINV
+ " ginvt %0, %1\n"
+ _ASM_UNSET_GINV
+ ".set pop"
+ : /* no outputs */
+ : "r"(addr), "i"(type)
+ : "memory");
+}
+
+static inline void ginvt_full(void)
+{
+ ginvt(0, GINVT_FULL);
+}
+
+static inline void ginvt_va(unsigned long addr)
+{
+ addr &= PAGE_MASK << 1;
+ ginvt(addr, GINVT_VA);
+}
+
+static inline void ginvt_mmid(void)
+{
+ ginvt(0, GINVT_MMID);
+}
+
+static inline void ginvt_va_mmid(unsigned long addr)
+{
+ addr &= PAGE_MASK << 1;
+ ginvt(addr, GINVT_VA | GINVT_MMID);
+}
+
+#endif /* __MIPS_ASM_GINVT_H__ */