2 * include/asm-ppc/cache.h
5 #ifndef __ARCH_PPC_CACHE_H
6 #define __ARCH_PPC_CACHE_H
8 #include <linux/config.h>
9 #include <asm/processor.h>
11 /* bytes per L1 cache line */
12 #if defined(CONFIG_8xx) || defined(CONFIG_403GCX)
13 #define L1_CACHE_LINE_SIZE 16
14 #define LG_L1_CACHE_LINE_SIZE 4
15 #define MAX_COPY_PREFETCH 1
16 #elif defined(CONFIG_PPC64BRIDGE)
17 #define L1_CACHE_LINE_SIZE 128
18 #define LG_L1_CACHE_LINE_SIZE 7
19 #define MAX_COPY_PREFETCH 1
21 #define L1_CACHE_LINE_SIZE 32
22 #define LG_L1_CACHE_LINE_SIZE 5
23 #define MAX_COPY_PREFETCH 4
26 #define L1_CACHE_BYTES L1_CACHE_LINE_SIZE
27 #define SMP_CACHE_BYTES L1_CACHE_BYTES
29 #define L1_CACHE_ALIGN(x) (((x)+(L1_CACHE_BYTES-1))&~(L1_CACHE_BYTES-1))
30 #define L1_CACHE_PAGES 8
33 #define __cacheline_aligned __attribute__((__aligned__(L1_CACHE_BYTES)))
35 #define __cacheline_aligned \
36 __attribute__((__aligned__(L1_CACHE_BYTES), \
37 __section__(".data.cacheline_aligned")))
41 extern void flush_dcache_range(unsigned long start, unsigned long stop);
42 extern void invalidate_dcache_range(unsigned long start, unsigned long stop);
43 extern void clean_dcache_range(unsigned long start, unsigned long stop);
44 extern void flush_dcache_all(void);
46 #endif /* __ASSEMBLY__ */
48 /* prep registers for L2 */
49 #define CACHECRBA 0x80000823 /* Cache configuration register address */
50 #define L2CACHE_MASK 0x03 /* Mask for 2 L2 Cache bits */
51 #define L2CACHE_512KB 0x00 /* 512KB */
52 #define L2CACHE_256KB 0x01 /* 256KB */
53 #define L2CACHE_1MB 0x02 /* 1MB */
54 #define L2CACHE_NONE 0x03 /* NONE */
55 #define L2CACHE_PARITY 0x08 /* Mask for L2 Cache Parity Protected bit */
58 /* Cache control on the MPC8xx is provided through some additional
59 * special purpose registers.
61 #define IC_CST 560 /* Instruction cache control/status */
62 #define IC_ADR 561 /* Address needed for some commands */
63 #define IC_DAT 562 /* Read-only data register */
64 #define DC_CST 568 /* Data cache control/status */
65 #define DC_ADR 569 /* Address needed for some commands */
66 #define DC_DAT 570 /* Read-only data register */
68 /* Commands. Only the first few are available to the instruction cache.
70 #define IDC_ENABLE 0x02000000 /* Cache enable */
71 #define IDC_DISABLE 0x04000000 /* Cache disable */
72 #define IDC_LDLCK 0x06000000 /* Load and lock */
73 #define IDC_UNLINE 0x08000000 /* Unlock line */
74 #define IDC_UNALL 0x0a000000 /* Unlock all */
75 #define IDC_INVALL 0x0c000000 /* Invalidate all */
77 #define DC_FLINE 0x0e000000 /* Flush data cache line */
78 #define DC_SFWT 0x01000000 /* Set forced writethrough mode */
79 #define DC_CFWT 0x03000000 /* Clear forced writethrough mode */
80 #define DC_SLES 0x05000000 /* Set little endian swap mode */
81 #define DC_CLES 0x07000000 /* Clear little endian swap mode */
85 #define IDC_ENABLED 0x80000000 /* Cache is enabled */
86 #define IDC_CERR1 0x00200000 /* Cache error 1 */
87 #define IDC_CERR2 0x00100000 /* Cache error 2 */
88 #define IDC_CERR3 0x00080000 /* Cache error 3 */
90 #define DC_DFWT 0x40000000 /* Data cache is forced write through */
91 #define DC_LES 0x20000000 /* Caches are little endian mode */
92 #endif /* CONFIG_8xx */
95 #endif /* __KERNEL__ */