xen/riscv: add <asm/asm.h> header

Signed-off-by: Oleksii Kurochko <oleksii.kurochko@gmail.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

diff --git a/xen/arch/riscv/include/asm/asm.h b/xen/arch/riscv/include/asm/asm.h
new file mode 100644 (file)
index 0000000..6d426ec
--- /dev/null
+++ b/xen/arch/riscv/include/asm/asm.h
@@ -0,0 +1,54 @@
+/* SPDX-License-Identifier: (GPL-2.0-only) */
+/*
+ * Copyright (C) 2015 Regents of the University of California
+ */
+
+#ifndef _ASM_RISCV_ASM_H
+#define _ASM_RISCV_ASM_H
+
+#ifdef __ASSEMBLY__
+#define __ASM_STR(x)   x
+#else
+#define __ASM_STR(x)   #x
+#endif
+
+#if __riscv_xlen == 64
+#define __REG_SEL(a, b)        __ASM_STR(a)
+#elif __riscv_xlen == 32
+#define __REG_SEL(a, b)        __ASM_STR(b)
+#else
+#error "Unexpected __riscv_xlen"
+#endif
+
+#define REG_L          __REG_SEL(ld, lw)
+#define REG_S          __REG_SEL(sd, sw)
+
+#if __SIZEOF_POINTER__ == 8
+#ifdef __ASSEMBLY__
+#define RISCV_PTR              .dword
+#else
+#define RISCV_PTR              ".dword"
+#endif
+#elif __SIZEOF_POINTER__ == 4
+#ifdef __ASSEMBLY__
+#define RISCV_PTR              .word
+#else
+#define RISCV_PTR              ".word"
+#endif
+#else
+#error "Unexpected __SIZEOF_POINTER__"
+#endif
+
+#if (__SIZEOF_INT__ == 4)
+#define RISCV_INT              __ASM_STR(.word)
+#else
+#error "Unexpected __SIZEOF_INT__"
+#endif
+
+#if (__SIZEOF_SHORT__ == 2)
+#define RISCV_SHORT            __ASM_STR(.half)
+#else
+#error "Unexpected __SIZEOF_SHORT__"
+#endif
+
+#endif /* _ASM_RISCV_ASM_H */