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alistair23-linux
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Avoid SMP cacheflushes. This is a minor optimization of startup but 

will also avoid smp_call_function from doing stupid things when called
from a CPU that is not yet marked online.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
hifive-unleashed-5.1
Ralf Baechle 2005-07-15 15:23:23 +00:00
parent bdf21b18b4
commit 1d40cfcd34
5 changed files with 15 additions and 29 deletions
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2
arch/mips/kernel/traps.c
View File

@ -1150,6 +1150,7 @@ static inline void signal32_init(void)
extern void cpu_cache_init(void);
extern void tlb_init(void);
extern void flush_tlb_handlers(void);
void __init per_cpu_trap_init(void)
{
@ -1348,4 +1349,5 @@ void __init trap_init(void)
#endif
flush_icache_range(ebase, ebase + 0x400);
flush_tlb_handlers();
}

5
arch/mips/mm/c-r4k.c
View File

@ -1270,9 +1270,8 @@ void __init ld_mmu_r4xx0(void)
_dma_cache_inv = r4k_dma_cache_inv;
#endif
__flush_cache_all();
coherency_setup();
build_clear_page();
build_copy_page();
local_r4k___flush_cache_all(NULL);
coherency_setup();
}

1
arch/mips/mm/c-tx39.c
View File

@ -492,4 +492,5 @@ void __init ld_mmu_tx39(void)
build_clear_page();
build_copy_page();
tx39h_flush_icache_all();
}

6
arch/mips/mm/pg-r4k.c
View File

@ -404,9 +404,6 @@ dest = label();
build_jr_ra();
flush_icache_range((unsigned long)&clear_page_array,
(unsigned long) epc);
BUG_ON(epc > clear_page_array + ARRAY_SIZE(clear_page_array));
}
@ -482,8 +479,5 @@ dest = label();
build_jr_ra();
flush_icache_range((unsigned long)&copy_page_array,
(unsigned long) epc);
BUG_ON(epc > copy_page_array + ARRAY_SIZE(copy_page_array));
}

30
arch/mips/mm/tlbex.c
View File

@ -743,7 +743,6 @@ static void __init build_r3000_tlb_refill_handler(void)
#endif
memcpy((void *)CAC_BASE, tlb_handler, 0x80);
flush_icache_range(CAC_BASE, CAC_BASE + 0x80);
}
/*
@ -1258,7 +1257,6 @@ static void __init build_r4000_tlb_refill_handler(void)
#endif
memcpy((void *)CAC_BASE, final_handler, 0x100);
flush_icache_range(CAC_BASE, CAC_BASE + 0x100);
}
/*
@ -1519,9 +1517,6 @@ static void __init build_r3000_tlb_load_handler(void)
printk("%08x\n", handle_tlbl[i]);
}
#endif
flush_icache_range((unsigned long)handle_tlbl,
(unsigned long)handle_tlbl + FASTPATH_SIZE * sizeof(u32));
}
static void __init build_r3000_tlb_store_handler(void)
@ -1559,9 +1554,6 @@ static void __init build_r3000_tlb_store_handler(void)
printk("%08x\n", handle_tlbs[i]);
}
#endif
flush_icache_range((unsigned long)handle_tlbs,
(unsigned long)handle_tlbs + FASTPATH_SIZE * sizeof(u32));
}
static void __init build_r3000_tlb_modify_handler(void)
@ -1599,9 +1591,6 @@ static void __init build_r3000_tlb_modify_handler(void)
printk("%08x\n", handle_tlbm[i]);
}
#endif
flush_icache_range((unsigned long)handle_tlbm,
(unsigned long)handle_tlbm + FASTPATH_SIZE * sizeof(u32));
}
/*
@ -1691,9 +1680,6 @@ static void __init build_r4000_tlb_load_handler(void)
printk("%08x\n", handle_tlbl[i]);
}
#endif
flush_icache_range((unsigned long)handle_tlbl,
(unsigned long)handle_tlbl + FASTPATH_SIZE * sizeof(u32));
}
static void __init build_r4000_tlb_store_handler(void)
@ -1730,9 +1716,6 @@ static void __init build_r4000_tlb_store_handler(void)
printk("%08x\n", handle_tlbs[i]);
}
#endif
flush_icache_range((unsigned long)handle_tlbs,
(unsigned long)handle_tlbs + FASTPATH_SIZE * sizeof(u32));
}
static void __init build_r4000_tlb_modify_handler(void)
@ -1770,9 +1753,6 @@ static void __init build_r4000_tlb_modify_handler(void)
printk("%08x\n", handle_tlbm[i]);
}
#endif
flush_icache_range((unsigned long)handle_tlbm,
(unsigned long)handle_tlbm + FASTPATH_SIZE * sizeof(u32));
}
void __init build_tlb_refill_handler(void)
@ -1820,3 +1800,13 @@ void __init build_tlb_refill_handler(void)
}
}
}
void __init flush_tlb_handlers(void)
{
flush_icache_range((unsigned long)handle_tlbl,
(unsigned long)handle_tlbl + sizeof(handle_tlbl));
flush_icache_range((unsigned long)handle_tlbs,
(unsigned long)handle_tlbs + sizeof(handle_tlbs));
flush_icache_range((unsigned long)handle_tlbm,
(unsigned long)handle_tlbm + sizeof(handle_tlbm));
}