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Diffstat (limited to 'arch/arc/include/asm/cache.h')
| -rw-r--r-- | arch/arc/include/asm/cache.h | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/arch/arc/include/asm/cache.h b/arch/arc/include/asm/cache.h new file mode 100644 index 000000000..2ad77fb43 --- /dev/null +++ b/arch/arc/include/asm/cache.h @@ -0,0 +1,133 @@ +/* + * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef __ARC_ASM_CACHE_H +#define __ARC_ASM_CACHE_H + +/* In case $$ not config, setup a dummy number for rest of kernel */ +#ifndef CONFIG_ARC_CACHE_LINE_SHIFT +#define L1_CACHE_SHIFT 6 +#else +#define L1_CACHE_SHIFT CONFIG_ARC_CACHE_LINE_SHIFT +#endif + +#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT) +#define CACHE_LINE_MASK (~(L1_CACHE_BYTES - 1)) + +/* + * ARC700 doesn't cache any access in top 1G (0xc000_0000 to 0xFFFF_FFFF) + * Ideal for wiring memory mapped peripherals as we don't need to do + * explicit uncached accesses (LD.di/ST.di) hence more portable drivers + */ +#define ARC_UNCACHED_ADDR_SPACE 0xc0000000 + +#ifndef __ASSEMBLY__ + +/* Uncached access macros */ +#define arc_read_uncached_32(ptr) \ +({ \ + unsigned int __ret; \ + __asm__ __volatile__( \ + " ld.di %0, [%1] \n" \ + : "=r"(__ret) \ + : "r"(ptr)); \ + __ret; \ +}) + +#define arc_write_uncached_32(ptr, data)\ +({ \ + __asm__ __volatile__( \ + " st.di %0, [%1] \n" \ + : \ + : "r"(data), "r"(ptr)); \ +}) + +/* Largest line length for either L1 or L2 is 128 bytes */ +#define SMP_CACHE_BYTES 128 +#define cache_line_size() SMP_CACHE_BYTES +#define ARCH_DMA_MINALIGN SMP_CACHE_BYTES + +/* + * Make sure slab-allocated buffers are 64-bit aligned when atomic64_t uses + * ARCv2 64-bit atomics (LLOCKD/SCONDD). This guarantess runtime 64-bit + * alignment for any atomic64_t embedded in buffer. + * Default ARCH_SLAB_MINALIGN is __alignof__(long long) which has a relaxed + * value of 4 (and not 8) in ARC ABI. + */ +#if defined(CONFIG_ARC_HAS_LL64) && defined(CONFIG_ARC_HAS_LLSC) +#define ARCH_SLAB_MINALIGN 8 +#endif + +extern void arc_cache_init(void); +extern char *arc_cache_mumbojumbo(int cpu_id, char *buf, int len); +extern void read_decode_cache_bcr(void); + +extern int ioc_enable; +extern unsigned long perip_base, perip_end; + +#endif /* !__ASSEMBLY__ */ + +/* Instruction cache related Auxiliary registers */ +#define ARC_REG_IC_BCR 0x77 /* Build Config reg */ +#define ARC_REG_IC_IVIC 0x10 +#define ARC_REG_IC_CTRL 0x11 +#define ARC_REG_IC_IVIR 0x16 +#define ARC_REG_IC_ENDR 0x17 +#define ARC_REG_IC_IVIL 0x19 +#define ARC_REG_IC_PTAG 0x1E +#define ARC_REG_IC_PTAG_HI 0x1F + +/* Bit val in IC_CTRL */ +#define IC_CTRL_DIS 0x1 + +/* Data cache related Auxiliary registers */ +#define ARC_REG_DC_BCR 0x72 /* Build Config reg */ +#define ARC_REG_DC_IVDC 0x47 +#define ARC_REG_DC_CTRL 0x48 +#define ARC_REG_DC_IVDL 0x4A +#define ARC_REG_DC_FLSH 0x4B +#define ARC_REG_DC_FLDL 0x4C +#define ARC_REG_DC_STARTR 0x4D +#define ARC_REG_DC_ENDR 0x4E +#define ARC_REG_DC_PTAG 0x5C +#define ARC_REG_DC_PTAG_HI 0x5F + +/* Bit val in DC_CTRL */ +#define DC_CTRL_DIS 0x001 +#define DC_CTRL_INV_MODE_FLUSH 0x040 +#define DC_CTRL_FLUSH_STATUS 0x100 +#define DC_CTRL_RGN_OP_INV 0x200 +#define DC_CTRL_RGN_OP_MSK 0x200 + +/*System-level cache (L2 cache) related Auxiliary registers */ +#define ARC_REG_SLC_CFG 0x901 +#define ARC_REG_SLC_CTRL 0x903 +#define ARC_REG_SLC_FLUSH 0x904 +#define ARC_REG_SLC_INVALIDATE 0x905 +#define ARC_AUX_SLC_IVDL 0x910 +#define ARC_AUX_SLC_FLDL 0x912 +#define ARC_REG_SLC_RGN_START 0x914 +#define ARC_REG_SLC_RGN_START1 0x915 +#define ARC_REG_SLC_RGN_END 0x916 +#define ARC_REG_SLC_RGN_END1 0x917 + +/* Bit val in SLC_CONTROL */ +#define SLC_CTRL_DIS 0x001 +#define SLC_CTRL_IM 0x040 +#define SLC_CTRL_BUSY 0x100 +#define SLC_CTRL_RGN_OP_INV 0x200 + +/* IO coherency related Auxiliary registers */ +#define ARC_REG_IO_COH_ENABLE 0x500 +#define ARC_IO_COH_ENABLE_BIT BIT(0) +#define ARC_REG_IO_COH_PARTIAL 0x501 +#define ARC_IO_COH_PARTIAL_BIT BIT(0) +#define ARC_REG_IO_COH_AP0_BASE 0x508 +#define ARC_REG_IO_COH_AP0_SIZE 0x509 + +#endif /* _ASM_CACHE_H */ |