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 #define ARCH_DMA_MINALIGN L1_CACHE_BYTES 24 25 #define __read_mostly __section(".data..read_mostly") 26 27 void parisc_cache_init(void); /* initializes cache-flushing */ 28 void disable_sr_hashing_asm(int); /* low level support for above */ 29 void disable_sr_hashing(void); /* turns off space register hashing */ 30 void free_sid(unsigned long); 31 unsigned long alloc_sid(void); 32 33 struct seq_file; 34 extern void show_cache_info(struct seq_file *m); 35 36 extern int split_tlb; 37 extern int dcache_stride; 38 extern int icache_stride; 39 extern struct pdc_cache_info cache_info; 40 extern struct pdc_btlb_info btlb_info; 41 void parisc_setup_cache_timing(void); 42 43 #define pdtlb(sr, addr) asm volatile("pdtlb 0(%%sr%0,%1)" \ 44 ALTERNATIVE(ALT_COND_NO_SMP, INSN_PxTLB) \ 45 : : "i"(sr), "r" (addr) : "memory") 46 #define pitlb(sr, addr) asm volatile("pitlb 0(%%sr%0,%1)" \ 47 ALTERNATIVE(ALT_COND_NO_SMP, INSN_PxTLB) \ 48 ALTERNATIVE(ALT_COND_NO_SPLIT_TLB, INSN_NOP) \ 49 : : "i"(sr), "r" (addr) : "memory") 50 51 #define asm_io_fdc(addr) asm volatile("fdc %%r0(%0)" \ 52 ALTERNATIVE(ALT_COND_NO_DCACHE, INSN_NOP) \ 53 ALTERNATIVE(ALT_COND_NO_IOC_FDC, INSN_NOP) \ 54 : : "r" (addr) : "memory") 55 #define asm_io_sync() asm volatile("sync" \ 56 ALTERNATIVE(ALT_COND_NO_DCACHE, INSN_NOP) \ 57 ALTERNATIVE(ALT_COND_NO_IOC_FDC, INSN_NOP) :::"memory") 58 #define asm_syncdma() asm volatile("syncdma" :::"memory") 59 60 #endif /* ! __ASSEMBLY__ */ 61 62 /* Classes of processor wrt: disabling space register hashing */ 63 64 #define SRHASH_PCXST 0 /* pcxs, pcxt, pcxt_ */ 65 #define SRHASH_PCXL 1 /* pcxl */ 66 #define SRHASH_PA20 2 /* pcxu, pcxu_, pcxw, pcxw_ */ 67 68 #endif 69