160 lines
4.7 KiB
C
160 lines
4.7 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2003, 2004 Ralf Baechle
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*/
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#ifndef __ASM_CPU_FEATURES_H
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#define __ASM_CPU_FEATURES_H
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#include <linux/config.h>
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#include <asm/cpu.h>
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#include <asm/cpu-info.h>
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#include <cpu-feature-overrides.h>
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/*
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* SMP assumption: Options of CPU 0 are a superset of all processors.
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* This is true for all known MIPS systems.
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*/
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#ifndef cpu_has_tlb
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#define cpu_has_tlb (cpu_data[0].options & MIPS_CPU_TLB)
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#endif
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#ifndef cpu_has_4kex
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#define cpu_has_4kex (cpu_data[0].options & MIPS_CPU_4KEX)
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#endif
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#ifndef cpu_has_4ktlb
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#define cpu_has_4ktlb (cpu_data[0].options & MIPS_CPU_4KTLB)
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#endif
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#ifndef cpu_has_fpu
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#define cpu_has_fpu (cpu_data[0].options & MIPS_CPU_FPU)
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#endif
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#ifndef cpu_has_32fpr
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#define cpu_has_32fpr (cpu_data[0].options & MIPS_CPU_32FPR)
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#endif
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#ifndef cpu_has_counter
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#define cpu_has_counter (cpu_data[0].options & MIPS_CPU_COUNTER)
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#endif
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#ifndef cpu_has_watch
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#define cpu_has_watch (cpu_data[0].options & MIPS_CPU_WATCH)
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#endif
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#ifndef cpu_has_mips16
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#define cpu_has_mips16 (cpu_data[0].options & MIPS_CPU_MIPS16)
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#endif
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#ifndef cpu_has_divec
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#define cpu_has_divec (cpu_data[0].options & MIPS_CPU_DIVEC)
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#endif
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#ifndef cpu_has_vce
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#define cpu_has_vce (cpu_data[0].options & MIPS_CPU_VCE)
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#endif
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#ifndef cpu_has_cache_cdex_p
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#define cpu_has_cache_cdex_p (cpu_data[0].options & MIPS_CPU_CACHE_CDEX_P)
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#endif
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#ifndef cpu_has_cache_cdex_s
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#define cpu_has_cache_cdex_s (cpu_data[0].options & MIPS_CPU_CACHE_CDEX_S)
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#endif
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#ifndef cpu_has_prefetch
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#define cpu_has_prefetch (cpu_data[0].options & MIPS_CPU_PREFETCH)
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#endif
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#ifndef cpu_has_mcheck
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#define cpu_has_mcheck (cpu_data[0].options & MIPS_CPU_MCHECK)
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#endif
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#ifndef cpu_has_ejtag
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#define cpu_has_ejtag (cpu_data[0].options & MIPS_CPU_EJTAG)
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#endif
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#ifndef cpu_has_llsc
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#define cpu_has_llsc (cpu_data[0].options & MIPS_CPU_LLSC)
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#endif
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#ifndef cpu_has_vtag_icache
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#define cpu_has_vtag_icache (cpu_data[0].icache.flags & MIPS_CACHE_VTAG)
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#endif
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#ifndef cpu_has_dc_aliases
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#define cpu_has_dc_aliases (cpu_data[0].dcache.flags & MIPS_CACHE_ALIASES)
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#endif
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#ifndef cpu_has_ic_fills_f_dc
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#define cpu_has_ic_fills_f_dc (cpu_data[0].icache.flags & MIPS_CACHE_IC_F_DC)
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#endif
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/*
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* I-Cache snoops remote store. This only matters on SMP. Some multiprocessors
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* such as the R10000 have I-Caches that snoop local stores; the embedded ones
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* don't. For maintaining I-cache coherency this means we need to flush the
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* D-cache all the way back to whever the I-cache does refills from, so the
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* I-cache has a chance to see the new data at all. Then we have to flush the
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* I-cache also.
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* Note we may have been rescheduled and may no longer be running on the CPU
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* that did the store so we can't optimize this into only doing the flush on
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* the local CPU.
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*/
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#ifndef cpu_icache_snoops_remote_store
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#ifdef CONFIG_SMP
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#define cpu_icache_snoops_remote_store (cpu_data[0].icache.flags & MIPS_IC_SNOOPS_REMOTE)
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#else
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#define cpu_icache_snoops_remote_store 1
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#endif
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#endif
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/*
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* Certain CPUs may throw bizarre exceptions if not the whole cacheline
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* contains valid instructions. For these we ensure proper alignment of
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* signal trampolines and pad them to the size of a full cache lines with
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* nops. This is also used in structure definitions so can't be a test macro
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* like the others.
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*/
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#ifndef PLAT_TRAMPOLINE_STUFF_LINE
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#define PLAT_TRAMPOLINE_STUFF_LINE 0UL
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#endif
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#ifdef CONFIG_32BIT
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# ifndef cpu_has_nofpuex
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# define cpu_has_nofpuex (cpu_data[0].options & MIPS_CPU_NOFPUEX)
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# endif
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# ifndef cpu_has_64bits
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# define cpu_has_64bits (cpu_data[0].isa_level & MIPS_CPU_ISA_64BIT)
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# endif
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# ifndef cpu_has_64bit_zero_reg
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# define cpu_has_64bit_zero_reg (cpu_data[0].isa_level & MIPS_CPU_ISA_64BIT)
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# endif
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# ifndef cpu_has_64bit_gp_regs
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# define cpu_has_64bit_gp_regs 0
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# endif
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# ifndef cpu_has_64bit_addresses
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# define cpu_has_64bit_addresses 0
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# endif
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#endif
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#ifdef CONFIG_64BIT
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# ifndef cpu_has_nofpuex
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# define cpu_has_nofpuex 0
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# endif
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# ifndef cpu_has_64bits
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# define cpu_has_64bits 1
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# endif
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# ifndef cpu_has_64bit_zero_reg
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# define cpu_has_64bit_zero_reg 1
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# endif
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# ifndef cpu_has_64bit_gp_regs
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# define cpu_has_64bit_gp_regs 1
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# endif
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# ifndef cpu_has_64bit_addresses
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# define cpu_has_64bit_addresses 1
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# endif
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#endif
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#ifndef cpu_has_subset_pcaches
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#define cpu_has_subset_pcaches (cpu_data[0].options & MIPS_CPU_SUBSET_CACHES)
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#endif
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#ifndef cpu_dcache_line_size
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#define cpu_dcache_line_size() current_cpu_data.dcache.linesz
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#endif
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#ifndef cpu_icache_line_size
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#define cpu_icache_line_size() current_cpu_data.icache.linesz
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#endif
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#ifndef cpu_scache_line_size
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#define cpu_scache_line_size() current_cpu_data.scache.linesz
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#endif
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#endif /* __ASM_CPU_FEATURES_H */
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