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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_CACHE_H
#define _ASM_POWERPC_CACHE_H
#ifdef __KERNEL__
/* bytes per L1 cache line */
#if defined(CONFIG_PPC_8xx) || defined(CONFIG_403GCX)
#define L1_CACHE_SHIFT 4
#define MAX_COPY_PREFETCH 1
#define IFETCH_ALIGN_SHIFT 2
#elif defined(CONFIG_PPC_E500MC)
#define L1_CACHE_SHIFT 6
#define MAX_COPY_PREFETCH 4
#define IFETCH_ALIGN_SHIFT 3
#elif defined(CONFIG_PPC32)
#define MAX_COPY_PREFETCH 4
#define IFETCH_ALIGN_SHIFT 3 /* 603 fetches 2 insn at a time */
#if defined(CONFIG_PPC_47x)
#define L1_CACHE_SHIFT 7
#else
#define L1_CACHE_SHIFT 5
#endif
#else /* CONFIG_PPC64 */
#define L1_CACHE_SHIFT 7
#define IFETCH_ALIGN_SHIFT 4 /* POWER8,9 */
#endif
#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
#define SMP_CACHE_BYTES L1_CACHE_BYTES
#define IFETCH_ALIGN_BYTES (1 << IFETCH_ALIGN_SHIFT)
#if !defined(__ASSEMBLY__)
#ifdef CONFIG_PPC64
struct ppc_cache_info {
u32 size;
u32 line_size;
u32 block_size; /* L1 only */
u32 log_block_size;
u32 blocks_per_page;
u32 sets;
u32 assoc;
};
struct ppc64_caches {
struct ppc_cache_info l1d;
struct ppc_cache_info l1i;
struct ppc_cache_info l2;
struct ppc_cache_info l3;
};
extern struct ppc64_caches ppc64_caches;
static inline u32 l1_cache_shift(void)
{
return ppc64_caches.l1d.log_block_size;
}
static inline u32 l1_cache_bytes(void)
{
return ppc64_caches.l1d.block_size;
}
#else
static inline u32 l1_cache_shift(void)
{
return L1_CACHE_SHIFT;
}
static inline u32 l1_cache_bytes(void)
{
return L1_CACHE_BYTES;
}
#endif
#endif /* ! __ASSEMBLY__ */
#if defined(__ASSEMBLY__)
/*
* For a snooping icache, we still need a dummy icbi to purge all the
* prefetched instructions from the ifetch buffers. We also need a sync
* before the icbi to order the the actual stores to memory that might
* have modified instructions with the icbi.
*/
#define PURGE_PREFETCHED_INS \
sync; \
icbi 0,r3; \
sync; \
isync
#else
#define __read_mostly __attribute__((__section__(".data..read_mostly")))
#ifdef CONFIG_PPC_BOOK3S_32
extern long _get_L2CR(void);
extern long _get_L3CR(void);
extern void _set_L2CR(unsigned long);
extern void _set_L3CR(unsigned long);
#else
#define _get_L2CR() 0L
#define _get_L3CR() 0L
#define _set_L2CR(val) do { } while(0)
#define _set_L3CR(val) do { } while(0)
#endif
static inline void dcbz(void *addr)
{
__asm__ __volatile__ ("dcbz %y0" : : "Z"(*(u8 *)addr) : "memory");
}
static inline void dcbi(void *addr)
{
__asm__ __volatile__ ("dcbi %y0" : : "Z"(*(u8 *)addr) : "memory");
}
static inline void dcbf(void *addr)
{
__asm__ __volatile__ ("dcbf %y0" : : "Z"(*(u8 *)addr) : "memory");
}
static inline void dcbst(void *addr)
{
__asm__ __volatile__ ("dcbst %y0" : : "Z"(*(u8 *)addr) : "memory");
}
#endif /* !__ASSEMBLY__ */
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_CACHE_H */
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