1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * include/asm-parisc/cache.h 4 */ 5 6 #ifndef __ARCH_PARISC_CACHE_H 7 #define __ARCH_PARISC_CACHE_H 8 9 #include <asm/alternative.h> 10 11 /* 12 * PA 2.0 processors have 64 and 128-byte L2 cachelines; PA 1.1 processors 13 * have 32-byte cachelines. The L1 length appears to be 16 bytes but this 14 * is not clearly documented. 15 */ 16 #define L1_CACHE_BYTES 16 17 #define L1_CACHE_SHIFT 4 18 19 #ifndef __ASSEMBLY__ 20 21 #define SMP_CACHE_BYTES L1_CACHE_BYTES 22 23 #ifdef CONFIG_PA20 24 #define ARCH_DMA_MINALIGN 128 25 #else 26 #define ARCH_DMA_MINALIGN 32 27 #endif 28 #define ARCH_KMALLOC_MINALIGN 16 /* ldcw requires 16-byte alignment */ 29 30 #define arch_slab_minalign() ((unsigned)dcache_stride) 31 #define cache_line_size() dcache_stride 32 #define dma_get_cache_alignment cache_line_size 33 34 #define __read_mostly __section(".data..read_mostly") 35 36 void parisc_cache_init(void); /* initializes cache-flushing */ 37 void disable_sr_hashing_asm(int); /* low level support for above */ 38 void disable_sr_hashing(void); /* turns off space register hashing */ 39 void free_sid(unsigned long); 40 unsigned long alloc_sid(void); 41 42 struct seq_file; 43 extern void show_cache_info(struct seq_file *m); 44 45 extern int split_tlb; 46 extern int dcache_stride; 47 extern int icache_stride; 48 extern struct pdc_cache_info cache_info; 49 extern struct pdc_btlb_info btlb_info; 50 void parisc_setup_cache_timing(void); 51 52 #define pdtlb(sr, addr) asm volatile("pdtlb 0(%%sr%0,%1)" \ 53 ALTERNATIVE(ALT_COND_NO_SMP, INSN_PxTLB) \ 54 : : "i"(sr), "r" (addr) : "memory") 55 #define pitlb(sr, addr) asm volatile("pitlb 0(%%sr%0,%1)" \ 56 ALTERNATIVE(ALT_COND_NO_SMP, INSN_PxTLB) \ 57 ALTERNATIVE(ALT_COND_NO_SPLIT_TLB, INSN_NOP) \ 58 : : "i"(sr), "r" (addr) : "memory") 59 60 #define asm_io_fdc(addr) asm volatile("fdc %%r0(%0)" \ 61 ALTERNATIVE(ALT_COND_NO_DCACHE, INSN_NOP) \ 62 ALTERNATIVE(ALT_COND_NO_IOC_FDC, INSN_NOP) \ 63 : : "r" (addr) : "memory") 64 #define asm_io_sync() asm volatile("sync" \ 65 ALTERNATIVE(ALT_COND_NO_DCACHE, INSN_NOP) \ 66 ALTERNATIVE(ALT_COND_NO_IOC_FDC, INSN_NOP) :::"memory") 67 #define asm_syncdma() asm volatile("syncdma" :::"memory") 68 69 #endif /* ! __ASSEMBLY__ */ 70 71 /* Classes of processor wrt: disabling space register hashing */ 72 73 #define SRHASH_PCXST 0 /* pcxs, pcxt, pcxt_ */ 74 #define SRHASH_PCXL 1 /* pcxl */ 75 #define SRHASH_PA20 2 /* pcxu, pcxu_, pcxw, pcxw_ */ 76 77 #endif 78