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/* SPDX-License-Identifier: GPL-2.0 */
/*
* include/asm-parisc/cache.h
*/
#ifndef __ARCH_PARISC_CACHE_H
#define __ARCH_PARISC_CACHE_H
#include <asm/alternative.h>
/*
* PA 2.0 processors have 64 and 128-byte L2 cachelines; PA 1.1 processors
* have 32-byte cachelines. The L1 length appears to be 16 bytes but this
* is not clearly documented.
*/
#define L1_CACHE_BYTES 16
#define L1_CACHE_SHIFT 4
#ifndef __ASSEMBLY__
#define SMP_CACHE_BYTES L1_CACHE_BYTES
#ifdef CONFIG_PA20
#define ARCH_DMA_MINALIGN 128
#else
#define ARCH_DMA_MINALIGN 32
#endif
#define ARCH_KMALLOC_MINALIGN 16 /* ldcw requires 16-byte alignment */
#define arch_slab_minalign() ((unsigned)dcache_stride)
#define cache_line_size() dcache_stride
#define dma_get_cache_alignment cache_line_size
#define __read_mostly __section(".data..read_mostly")
void parisc_cache_init(void); /* initializes cache-flushing */
void disable_sr_hashing_asm(int); /* low level support for above */
void disable_sr_hashing(void); /* turns off space register hashing */
void free_sid(unsigned long);
unsigned long alloc_sid(void);
struct seq_file;
extern void show_cache_info(struct seq_file *m);
extern int split_tlb;
extern int dcache_stride;
extern int icache_stride;
extern struct pdc_cache_info cache_info;
extern struct pdc_btlb_info btlb_info;
void parisc_setup_cache_timing(void);
#define pdtlb(sr, addr) asm volatile("pdtlb 0(%%sr%0,%1)" \
ALTERNATIVE(ALT_COND_NO_SMP, INSN_PxTLB) \
: : "i"(sr), "r" (addr) : "memory")
#define pitlb(sr, addr) asm volatile("pitlb 0(%%sr%0,%1)" \
ALTERNATIVE(ALT_COND_NO_SMP, INSN_PxTLB) \
ALTERNATIVE(ALT_COND_NO_SPLIT_TLB, INSN_NOP) \
: : "i"(sr), "r" (addr) : "memory")
#define asm_io_fdc(addr) asm volatile("fdc %%r0(%0)" \
ALTERNATIVE(ALT_COND_NO_DCACHE, INSN_NOP) \
ALTERNATIVE(ALT_COND_NO_IOC_FDC, INSN_NOP) \
: : "r" (addr) : "memory")
#define asm_io_sync() asm volatile("sync" \
ALTERNATIVE(ALT_COND_NO_DCACHE, INSN_NOP) \
ALTERNATIVE(ALT_COND_NO_IOC_FDC, INSN_NOP) :::"memory")
#define asm_syncdma() asm volatile("syncdma" :::"memory")
#endif /* ! __ASSEMBLY__ */
/* Classes of processor wrt: disabling space register hashing */
#define SRHASH_PCXST 0 /* pcxs, pcxt, pcxt_ */
#define SRHASH_PCXL 1 /* pcxl */
#define SRHASH_PA20 2 /* pcxu, pcxu_, pcxw, pcxw_ */
#endif