summaryrefslogtreecommitdiff
path: root/arch/csky/include/asm
diff options
context:
space:
mode:
Diffstat (limited to 'arch/csky/include/asm')
-rw-r--r--arch/csky/include/asm/bitops.h82
-rw-r--r--arch/csky/include/asm/checksum.h50
-rw-r--r--arch/csky/include/asm/reg_ops.h26
3 files changed, 158 insertions, 0 deletions
diff --git a/arch/csky/include/asm/bitops.h b/arch/csky/include/asm/bitops.h
new file mode 100644
index 000000000000..335f2883fb1e
--- /dev/null
+++ b/arch/csky/include/asm/bitops.h
@@ -0,0 +1,82 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
+
+#ifndef __ASM_CSKY_BITOPS_H
+#define __ASM_CSKY_BITOPS_H
+
+#include <linux/compiler.h>
+#include <asm/barrier.h>
+
+/*
+ * asm-generic/bitops/ffs.h
+ */
+static inline int ffs(int x)
+{
+ if (!x)
+ return 0;
+
+ asm volatile (
+ "brev %0\n"
+ "ff1 %0\n"
+ "addi %0, 1\n"
+ : "=&r"(x)
+ : "0"(x));
+ return x;
+}
+
+/*
+ * asm-generic/bitops/__ffs.h
+ */
+static __always_inline unsigned long __ffs(unsigned long x)
+{
+ asm volatile (
+ "brev %0\n"
+ "ff1 %0\n"
+ : "=&r"(x)
+ : "0"(x));
+ return x;
+}
+
+/*
+ * asm-generic/bitops/fls.h
+ */
+static __always_inline int fls(int x)
+{
+ asm volatile(
+ "ff1 %0\n"
+ : "=&r"(x)
+ : "0"(x));
+
+ return (32 - x);
+}
+
+/*
+ * asm-generic/bitops/__fls.h
+ */
+static __always_inline unsigned long __fls(unsigned long x)
+{
+ return fls(x) - 1;
+}
+
+#include <asm-generic/bitops/ffz.h>
+#include <asm-generic/bitops/fls64.h>
+#include <asm-generic/bitops/find.h>
+
+#ifndef _LINUX_BITOPS_H
+#error only <linux/bitops.h> can be included directly
+#endif
+
+#include <asm-generic/bitops/sched.h>
+#include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
+#include <asm-generic/bitops/atomic.h>
+
+/*
+ * bug fix, why only could use atomic!!!!
+ */
+#include <asm-generic/bitops/non-atomic.h>
+#define __clear_bit(nr, vaddr) clear_bit(nr, vaddr)
+
+#include <asm-generic/bitops/le.h>
+#include <asm-generic/bitops/ext2-atomic.h>
+#endif /* __ASM_CSKY_BITOPS_H */
diff --git a/arch/csky/include/asm/checksum.h b/arch/csky/include/asm/checksum.h
new file mode 100644
index 000000000000..7685824291b1
--- /dev/null
+++ b/arch/csky/include/asm/checksum.h
@@ -0,0 +1,50 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
+
+#ifndef __ASM_CSKY_CHECKSUM_H
+#define __ASM_CSKY_CHECKSUM_H
+
+#include <linux/in6.h>
+#include <asm/byteorder.h>
+
+static inline __sum16 csum_fold(__wsum csum)
+{
+ u32 tmp;
+
+ asm volatile(
+ "mov %1, %0\n"
+ "rori %0, 16\n"
+ "addu %0, %1\n"
+ "lsri %0, 16\n"
+ : "=r"(csum), "=r"(tmp)
+ : "0"(csum));
+
+ return (__force __sum16) ~csum;
+}
+#define csum_fold csum_fold
+
+static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
+ unsigned short len, unsigned short proto, __wsum sum)
+{
+ asm volatile(
+ "clrc\n"
+ "addc %0, %1\n"
+ "addc %0, %2\n"
+ "addc %0, %3\n"
+ "inct %0\n"
+ : "=r"(sum)
+ : "r"((__force u32)saddr), "r"((__force u32)daddr),
+#ifdef __BIG_ENDIAN
+ "r"(proto + len),
+#else
+ "r"((proto + len) << 8),
+#endif
+ "0" ((__force unsigned long)sum)
+ : "cc");
+ return sum;
+}
+#define csum_tcpudp_nofold csum_tcpudp_nofold
+
+#include <asm-generic/checksum.h>
+
+#endif /* __ASM_CSKY_CHECKSUM_H */
diff --git a/arch/csky/include/asm/reg_ops.h b/arch/csky/include/asm/reg_ops.h
new file mode 100644
index 000000000000..cccf7d525fe2
--- /dev/null
+++ b/arch/csky/include/asm/reg_ops.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __ASM_REGS_OPS_H
+#define __ASM_REGS_OPS_H
+
+#define mfcr(reg) \
+({ \
+ unsigned int tmp; \
+ asm volatile( \
+ "mfcr %0, "reg"\n" \
+ : "=r"(tmp) \
+ : \
+ : "memory"); \
+ tmp; \
+})
+
+#define mtcr(reg, val) \
+({ \
+ asm volatile( \
+ "mtcr %0, "reg"\n" \
+ : \
+ : "r"(val) \
+ : "memory"); \
+})
+
+#endif /* __ASM_REGS_OPS_H */