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1 /*
2  * Copyright (C) 2011 Andes Technology Corporation
3  * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com>
4  * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
5  *
6  * SPDX-License-Identifier:     GPL-2.0+
7  */
8
9 #ifndef _ASM_CACHE_H
10 #define _ASM_CACHE_H
11
12 /* cache */
13 int     icache_status(void);
14 void    icache_enable(void);
15 void    icache_disable(void);
16 int     dcache_status(void);
17 void    dcache_enable(void);
18 void    dcache_disable(void);
19
20 #define DEFINE_GET_SYS_REG(reg) \
21         static inline unsigned long GET_##reg(void)             \
22         {                                                       \
23                 unsigned long val;                              \
24                 __asm__ volatile (                              \
25                 "mfsr %0, $"#reg : "=&r" (val) : : "memory"     \
26                 );                                              \
27                 return val;                                     \
28         }
29
30 enum cache_t {ICACHE, DCACHE};
31 DEFINE_GET_SYS_REG(ICM_CFG);
32 DEFINE_GET_SYS_REG(DCM_CFG);
33 #define ICM_CFG_OFF_ISZ 6       /* I-cache line size */
34 #define ICM_CFG_MSK_ISZ (0x7UL << ICM_CFG_OFF_ISZ)
35 #define DCM_CFG_OFF_DSZ 6       /* D-cache line size */
36 #define DCM_CFG_MSK_DSZ (0x7UL << DCM_CFG_OFF_DSZ)
37
38 /*
39  * The current upper bound for NDS32 L1 data cache line sizes is 32 bytes.
40  * We use that value for aligning DMA buffers unless the board config has
41  * specified an alternate cache line size.
42  */
43 #ifdef CONFIG_SYS_CACHELINE_SIZE
44 #define ARCH_DMA_MINALIGN       CONFIG_SYS_CACHELINE_SIZE
45 #else
46 #define ARCH_DMA_MINALIGN       32
47 #endif
48
49 #endif /* _ASM_CACHE_H */