include: Rename sbi_unpriv.h to riscv_unpriv.h

The sbi_unpriv.h has quite a few load_xyz() and store_xyz() helper
routines based on RISC-V inline assembly for unpriviledged accesses
from M-mode. These helper routines are similar to helper routines
present in riscv_locks.h, riscv_io.h, and riscv_atomic.h so let's
rename sbi_unpriv.h to riscv_unpriv.h.

Signed-off-by: Anup Patel <anup.patel@wdc.com>

1 files changed, 0 insertions, 117 deletions

diff --git a/include/sbi/sbi_unpriv.h b/include/sbi/sbi_unpriv.h
deleted file mode 100644
index 2d9dbb9..0000000
--- a/include/sbi/sbi_unpriv.h
+++ /dev/null
@@ -1,117 +0,0 @@
-/*
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 2019 Western Digital Corporation or its affiliates.
- *
- * Authors:
- *   Anup Patel <anup.patel@wdc.com>
- */
-
-#ifndef __SBI_UNPRIV_H__
-#define __SBI_UNPRIV_H__
-
-#include <sbi/riscv_encoding.h>
-#include <sbi/sbi_bits.h>
-#include <sbi/sbi_types.h>
-
-#define DECLARE_UNPRIVILEGED_LOAD_FUNCTION(type, insn)			\
-static inline type load_##type(const type *addr)			\
-{									\
-	register ulong __mstatus asm ("a2");				\
-	type val;							\
-	asm ("csrrs %0, "STR(CSR_MSTATUS)", %3\n"			\
-		#insn " %1, %2\n"					\
-		"csrw "STR(CSR_MSTATUS)", %0"				\
-	: "+&r" (__mstatus), "=&r" (val)				\
-	: "m" (*addr), "r" (MSTATUS_MPRV));				\
-	return val;							\
-}
-
-#define DECLARE_UNPRIVILEGED_STORE_FUNCTION(type, insn)			\
-static inline void store_##type(type *addr, type val)			\
-{									\
-	register ulong __mstatus asm ("a3");				\
-	asm volatile ("csrrs %0, "STR(CSR_MSTATUS)", %3\n"		\
-		#insn " %1, %2\n"					\
-		"csrw "STR(CSR_MSTATUS)", %0"				\
-	: "+&r" (__mstatus)						\
-	: "r" (val), "m" (*addr), "r" (MSTATUS_MPRV));			\
-}
-
-DECLARE_UNPRIVILEGED_LOAD_FUNCTION(u8, lbu)
-DECLARE_UNPRIVILEGED_LOAD_FUNCTION(u16, lhu)
-DECLARE_UNPRIVILEGED_LOAD_FUNCTION(s8, lb)
-DECLARE_UNPRIVILEGED_LOAD_FUNCTION(s16, lh)
-DECLARE_UNPRIVILEGED_LOAD_FUNCTION(s32, lw)
-DECLARE_UNPRIVILEGED_STORE_FUNCTION(u8, sb)
-DECLARE_UNPRIVILEGED_STORE_FUNCTION(u16, sh)
-DECLARE_UNPRIVILEGED_STORE_FUNCTION(u32, sw)
-#if __riscv_xlen == 64
-DECLARE_UNPRIVILEGED_LOAD_FUNCTION(u32, lwu)
-DECLARE_UNPRIVILEGED_LOAD_FUNCTION(u64, ld)
-DECLARE_UNPRIVILEGED_STORE_FUNCTION(u64, sd)
-DECLARE_UNPRIVILEGED_LOAD_FUNCTION(ulong, ld)
-#else
-DECLARE_UNPRIVILEGED_LOAD_FUNCTION(u32, lw)
-DECLARE_UNPRIVILEGED_LOAD_FUNCTION(ulong, lw)
-
-static inline u64 load_u64(const u64 *addr)
-{
-	return load_u32((u32 *)addr)
-		+ ((u64)load_u32((u32 *)addr + 1) << 32);
-}
-
-static inline void store_u64(u64 *addr, u64 val)
-{
-	store_u32((u32 *)addr, val);
-	store_u32((u32 *)addr + 1, val >> 32);
-}
-#endif
-
-static inline ulong get_insn(ulong mepc, ulong *mstatus)
-{
-	register ulong __mepc asm ("a2") = mepc;
-	register ulong __mstatus asm ("a3");
-	ulong val;
-#ifndef __riscv_compressed
-	asm ("csrrs %[mstatus], "STR(CSR_MSTATUS)", %[mprv]\n"
-#if __riscv_xlen == 64
-		STR(LWU) " %[insn], (%[addr])\n"
-#else
-		STR(LW) " %[insn], (%[addr])\n"
-#endif
-		"csrw "STR(CSR_MSTATUS)", %[mstatus]"
-		: [mstatus] "+&r" (__mstatus), [insn] "=&r" (val)
-		: [mprv] "r" (MSTATUS_MPRV | MSTATUS_MXR), [addr] "r" (__mepc));
-#else
-	ulong rvc_mask = 3, tmp;
-	asm ("csrrs %[mstatus], "STR(CSR_MSTATUS)", %[mprv]\n"
-		"and %[tmp], %[addr], 2\n"
-		"bnez %[tmp], 1f\n"
-#if __riscv_xlen == 64
-		STR(LWU) " %[insn], (%[addr])\n"
-#else
-		STR(LW) " %[insn], (%[addr])\n"
-#endif
-		"and %[tmp], %[insn], %[rvc_mask]\n"
-		"beq %[tmp], %[rvc_mask], 2f\n"
-		"sll %[insn], %[insn], %[xlen_minus_16]\n"
-		"srl %[insn], %[insn], %[xlen_minus_16]\n"
-		"j 2f\n"
-		"1:\n"
-		"lhu %[insn], (%[addr])\n"
-		"and %[tmp], %[insn], %[rvc_mask]\n"
-		"bne %[tmp], %[rvc_mask], 2f\n"
-		"lhu %[tmp], 2(%[addr])\n"
-		"sll %[tmp], %[tmp], 16\n"
-		"add %[insn], %[insn], %[tmp]\n"
-		"2: csrw "STR(CSR_MSTATUS)", %[mstatus]"
-	: [mstatus] "+&r" (__mstatus), [insn] "=&r" (val), [tmp] "=&r" (tmp)
-	: [mprv] "r" (MSTATUS_MPRV | MSTATUS_MXR), [addr] "r" (__mepc),
-	[rvc_mask] "r" (rvc_mask), [xlen_minus_16] "i" (__riscv_xlen - 16));
-#endif
-	*mstatus = __mstatus;
-	return val;
-}
-
-#endif