riscv: nx25: include: Add header files to support RISC-V
Add header files for RISC-V.
Cache, ptregs, data type and other definitions are included.
Signed-off-by: Rick Chen <rick@andestech.com>
Signed-off-by: Rick Chen <rickchen36@gmail.com>
Signed-off-by: Greentime Hu <green.hu@gmail.com>
diff --git a/arch/riscv/include/asm/bitops.h b/arch/riscv/include/asm/bitops.h
new file mode 100644
index 0000000..55d420f
--- /dev/null
+++ b/arch/riscv/include/asm/bitops.h
@@ -0,0 +1,172 @@
+/*
+ * Copyright 1995, Russell King.
+ * Various bits and pieces copyrights include:
+ * Linus Torvalds (test_bit).
+ *
+ * Copyright (C) 2017 Andes Technology Corporation
+ * Rick Chen, Andes Technology Corporation <rick@andestech.com>
+ *
+ * bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1).
+ *
+ * Please note that the code in this file should never be included
+ * from user space. Many of these are not implemented in assembler
+ * since they would be too costly. Also, they require priviledged
+ * instructions (which are not available from user mode) to ensure
+ * that they are atomic.
+ */
+
+#ifndef __ASM_RISCV_BITOPS_H
+#define __ASM_RISCV_BITOPS_H
+
+#ifdef __KERNEL__
+
+#include <asm/system.h>
+#include <asm-generic/bitops/fls.h>
+#include <asm-generic/bitops/__fls.h>
+#include <asm-generic/bitops/fls64.h>
+#include <asm-generic/bitops/__ffs.h>
+
+#define smp_mb__before_clear_bit() do { } while (0)
+#define smp_mb__after_clear_bit() do { } while (0)
+
+/*
+ * Function prototypes to keep gcc -Wall happy.
+ */
+static inline void __set_bit(int nr, void *addr)
+{
+ int *a = (int *)addr;
+ int mask;
+
+ a += nr >> 5;
+ mask = 1 << (nr & 0x1f);
+ *a |= mask;
+}
+
+static inline void __clear_bit(int nr, void *addr)
+{
+ int *a = (int *)addr;
+ int mask;
+
+ a += nr >> 5;
+ mask = 1 << (nr & 0x1f);
+ *a &= ~mask;
+}
+
+static inline void __change_bit(int nr, void *addr)
+{
+ int mask;
+ unsigned long *ADDR = (unsigned long *)addr;
+
+ ADDR += nr >> 5;
+ mask = 1 << (nr & 31);
+ *ADDR ^= mask;
+}
+
+static inline int __test_and_set_bit(int nr, void *addr)
+{
+ int mask, retval;
+ unsigned int *a = (unsigned int *)addr;
+
+ a += nr >> 5;
+ mask = 1 << (nr & 0x1f);
+ retval = (mask & *a) != 0;
+ *a |= mask;
+ return retval;
+}
+
+static inline int __test_and_clear_bit(int nr, void *addr)
+{
+ int mask, retval;
+ unsigned int *a = (unsigned int *)addr;
+
+ a += nr >> 5;
+ mask = 1 << (nr & 0x1f);
+ retval = (mask & *a) != 0;
+ *a &= ~mask;
+ return retval;
+}
+
+static inline int __test_and_change_bit(int nr, void *addr)
+{
+ int mask, retval;
+ unsigned int *a = (unsigned int *)addr;
+
+ a += nr >> 5;
+ mask = 1 << (nr & 0x1f);
+ retval = (mask & *a) != 0;
+ *a ^= mask;
+ return retval;
+}
+
+/*
+ * This routine doesn't need to be atomic.
+ */
+static inline int test_bit(int nr, const void *addr)
+{
+ return ((unsigned char *)addr)[nr >> 3] & (1U << (nr & 7));
+}
+
+/*
+ * ffz = Find First Zero in word. Undefined if no zero exists,
+ * so code should check against ~0UL first..
+ */
+static inline unsigned long ffz(unsigned long word)
+{
+ int k;
+
+ word = ~word;
+ k = 31;
+ if (word & 0x0000ffff) {
+ k -= 16; word <<= 16;
+ }
+ if (word & 0x00ff0000) {
+ k -= 8; word <<= 8;
+ }
+ if (word & 0x0f000000) {
+ k -= 4; word <<= 4;
+ }
+ if (word & 0x30000000) {
+ k -= 2; word <<= 2;
+ }
+ if (word & 0x40000000)
+ k -= 1;
+
+ return k;
+}
+
+/*
+ * ffs: find first bit set. This is defined the same way as
+ * the libc and compiler builtin ffs routines, therefore
+ * differs in spirit from the above ffz (man ffs).
+ */
+
+/*
+ * redefined in include/linux/bitops.h
+ * #define ffs(x) generic_ffs(x)
+ */
+
+/*
+ * hweightN: returns the hamming weight (i.e. the number
+ * of bits set) of a N-bit word
+ */
+
+#define hweight32(x) generic_hweight32(x)
+#define hweight16(x) generic_hweight16(x)
+#define hweight8(x) generic_hweight8(x)
+
+#define ext2_set_bit test_and_set_bit
+#define ext2_clear_bit test_and_clear_bit
+#define ext2_test_bit test_bit
+#define ext2_find_first_zero_bit find_first_zero_bit
+#define ext2_find_next_zero_bit find_next_zero_bit
+
+/* Bitmap functions for the minix filesystem. */
+#define minix_test_and_set_bit(nr, addr) test_and_set_bit(nr, addr)
+#define minix_set_bit(nr, addr) set_bit(nr, addr)
+#define minix_test_and_clear_bit(nr, addr) test_and_clear_bit(nr, addr)
+#define minix_test_bit(nr, addr) test_bit(nr, addr)
+#define minix_find_first_zero_bit(addr, size) find_first_zero_bit(addr, size)
+
+#endif /* __KERNEL__ */
+
+#endif /* __ASM_RISCV_BITOPS_H */