1#ifndef _ASM_POWERPC_CACHE_H
2#define _ASM_POWERPC_CACHE_H
3
4#ifdef __KERNEL__
5
6#include <asm/reg.h>
7
8/* bytes per L1 cache line */
9#if defined(CONFIG_8xx) || defined(CONFIG_403GCX)
10#define L1_CACHE_SHIFT		4
11#define MAX_COPY_PREFETCH	1
12#elif defined(CONFIG_PPC_E500MC)
13#define L1_CACHE_SHIFT		6
14#define MAX_COPY_PREFETCH	4
15#elif defined(CONFIG_PPC32)
16#define MAX_COPY_PREFETCH	4
17#if defined(CONFIG_PPC_47x)
18#define L1_CACHE_SHIFT		7
19#else
20#define L1_CACHE_SHIFT		5
21#endif
22#else /* CONFIG_PPC64 */
23#define L1_CACHE_SHIFT		7
24#endif
25
26#define	L1_CACHE_BYTES		(1 << L1_CACHE_SHIFT)
27
28#define	SMP_CACHE_BYTES		L1_CACHE_BYTES
29
30#if defined(__powerpc64__) && !defined(__ASSEMBLY__)
31struct ppc64_caches {
32	u32	dsize;			/* L1 d-cache size */
33	u32	dline_size;		/* L1 d-cache line size	*/
34	u32	log_dline_size;
35	u32	dlines_per_page;
36	u32	isize;			/* L1 i-cache size */
37	u32	iline_size;		/* L1 i-cache line size	*/
38	u32	log_iline_size;
39	u32	ilines_per_page;
40};
41
42extern struct ppc64_caches ppc64_caches;
43
44static inline void logmpp(u64 x)
45{
46	asm volatile(PPC_LOGMPP(R1) : : "r" (x));
47}
48
49#endif /* __powerpc64__ && ! __ASSEMBLY__ */
50
51#if defined(__ASSEMBLY__)
52/*
53 * For a snooping icache, we still need a dummy icbi to purge all the
54 * prefetched instructions from the ifetch buffers. We also need a sync
55 * before the icbi to order the the actual stores to memory that might
56 * have modified instructions with the icbi.
57 */
58#define PURGE_PREFETCHED_INS	\
59	sync;			\
60	icbi	0,r3;		\
61	sync;			\
62	isync
63
64#else
65#define __read_mostly __attribute__((__section__(".data..read_mostly")))
66
67#ifdef CONFIG_6xx
68extern long _get_L2CR(void);
69extern long _get_L3CR(void);
70extern void _set_L2CR(unsigned long);
71extern void _set_L3CR(unsigned long);
72#else
73#define _get_L2CR()	0L
74#define _get_L3CR()	0L
75#define _set_L2CR(val)	do { } while(0)
76#define _set_L3CR(val)	do { } while(0)
77#endif
78
79#endif /* !__ASSEMBLY__ */
80#endif /* __KERNEL__ */
81#endif /* _ASM_POWERPC_CACHE_H */
82