1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 2004 Cavium Networks 7 */ 8 #ifndef __ASM_MACH_CAVIUM_OCTEON_CPU_FEATURE_OVERRIDES_H 9 #define __ASM_MACH_CAVIUM_OCTEON_CPU_FEATURE_OVERRIDES_H 10 11 #include <linux/types.h> 12 #include <asm/mipsregs.h> 13 14 /* 15 * Cavium Octeons are MIPS64v2 processors 16 */ 17 #define cpu_dcache_line_size() 128 18 #define cpu_icache_line_size() 128 19 20 21 #define cpu_has_4kex 1 22 #define cpu_has_3k_cache 0 23 #define cpu_has_4k_cache 0 24 #define cpu_has_tx39_cache 0 25 #define cpu_has_fpu 0 26 #define cpu_has_counter 1 27 #define cpu_has_watch 1 28 #define cpu_has_divec 1 29 #define cpu_has_vce 0 30 #define cpu_has_cache_cdex_p 0 31 #define cpu_has_cache_cdex_s 0 32 #define cpu_has_prefetch 1 33 34 /* 35 * We should disable LL/SC on non SMP systems as it is faster to 36 * disable interrupts for atomic access than a LL/SC. Unfortunatly we 37 * cannot as this breaks asm/futex.h 38 */ 39 #define cpu_has_llsc 1 40 #define cpu_has_vtag_icache 1 41 #define cpu_has_dc_aliases 0 42 #define cpu_has_ic_fills_f_dc 0 43 #define cpu_has_64bits 1 44 #define cpu_has_octeon_cache 1 45 #define cpu_has_saa octeon_has_saa() 46 #define cpu_has_mips32r1 0 47 #define cpu_has_mips32r2 0 48 #define cpu_has_mips64r1 0 49 #define cpu_has_mips64r2 1 50 #define cpu_has_dsp 0 51 #define cpu_has_mipsmt 0 52 #define cpu_has_userlocal 0 53 #define cpu_has_vint 0 54 #define cpu_has_veic 0 55 #define ARCH_HAS_READ_CURRENT_TIMER 1 56 #define ARCH_HAS_IRQ_PER_CPU 1 57 #define ARCH_HAS_SPINLOCK_PREFETCH 1 58 #define spin_lock_prefetch(x) prefetch(x) 59 #define PREFETCH_STRIDE 128 60 61 static inline int read_current_timer(unsigned long *result) 62 { 63 asm volatile ("rdhwr %0,$31\n" 64 #ifndef CONFIG_64BIT 65 "\tsll %0, 0" 66 #endif 67 : "=r" (*result)); 68 return 0; 69 } 70 71 static inline int octeon_has_saa(void) 72 { 73 int id; 74 asm volatile ("mfc0 %0, $15,0" : "=r" (id)); 75 return id >= 0x000d0300; 76 } 77 78 #endif 79