arch/powerpc/include/asm/cache.h

Source file repositories/reference/linux-study-clean/arch/powerpc/include/asm/cache.h

File Facts

System
Linux kernel
Corpus path
arch/powerpc/include/asm/cache.h
Extension
.h
Size
2972 bytes
Lines
151
Domain
Architecture Layer
Bucket
arch/powerpc
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

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_dcache_shift(void)
{
	return ppc64_caches.l1d.log_block_size;
}

static inline u32 l1_dcache_bytes(void)
{
	return ppc64_caches.l1d.block_size;
}

static inline u32 l1_icache_shift(void)
{
	return ppc64_caches.l1i.log_block_size;
}

static inline u32 l1_icache_bytes(void)
{
	return ppc64_caches.l1i.block_size;
}
#else
static inline u32 l1_dcache_shift(void)
{
	return L1_CACHE_SHIFT;
}

static inline u32 l1_dcache_bytes(void)
{
	return L1_CACHE_BYTES;
}

static inline u32 l1_icache_shift(void)
{
	return L1_CACHE_SHIFT;
}

static inline u32 l1_icache_bytes(void)
{
	return L1_CACHE_BYTES;
}

#endif

#define __read_mostly __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 0, %0" : : "r"(addr) : "memory");
}

static inline void dcbi(void *addr)
{
	__asm__ __volatile__ ("dcbi 0, %0" : : "r"(addr) : "memory");
}

static inline void dcbf(void *addr)
{
	__asm__ __volatile__ ("dcbf 0, %0" : : "r"(addr) : "memory");
}

Annotation

Implementation Notes