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sh: TLB miss fast-path optimizations.

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Handle simple TLB miss faults which can be resolved completely
from the page table in assembler.

Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Stuart Menefy
2006-11-24 11:42:24 +09:00
committed by Paul Mundt
parent 9daa0c257d
commit 9b3a53ab76
6 changed files with 204 additions and 117 deletions
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19
arch/sh/kernel/cpu/sh4/probe.c
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@@ -79,16 +79,16 @@ int __init detect_cpu_and_cache_system(void)
case 0x205:
cpu_data->type = CPU_SH7750;
cpu_data->flags |= CPU_HAS_P2_FLUSH_BUG | CPU_HAS_FPU |
CPU_HAS_PERF_COUNTER | CPU_HAS_PTEA;
CPU_HAS_PERF_COUNTER;
break;
case 0x206:
cpu_data->type = CPU_SH7750S;
cpu_data->flags |= CPU_HAS_P2_FLUSH_BUG | CPU_HAS_FPU |
CPU_HAS_PERF_COUNTER | CPU_HAS_PTEA;
CPU_HAS_PERF_COUNTER;
break;
case 0x1100:
cpu_data->type = CPU_SH7751;
cpu_data->flags |= CPU_HAS_FPU | CPU_HAS_PTEA;
cpu_data->flags |= CPU_HAS_FPU;
break;
case 0x2000:
cpu_data->type = CPU_SH73180;
@@ -126,23 +126,22 @@ int __init detect_cpu_and_cache_system(void)
break;
case 0x8000:
cpu_data->type = CPU_ST40RA;
cpu_data->flags |= CPU_HAS_FPU | CPU_HAS_PTEA;
cpu_data->flags |= CPU_HAS_FPU;
break;
case 0x8100:
cpu_data->type = CPU_ST40GX1;
cpu_data->flags |= CPU_HAS_FPU | CPU_HAS_PTEA;
cpu_data->flags |= CPU_HAS_FPU;
break;
case 0x700:
cpu_data->type = CPU_SH4_501;
cpu_data->icache.ways = 2;
cpu_data->dcache.ways = 2;
cpu_data->flags |= CPU_HAS_PTEA;
break;
case 0x600:
cpu_data->type = CPU_SH4_202;
cpu_data->icache.ways = 2;
cpu_data->dcache.ways = 2;
cpu_data->flags |= CPU_HAS_FPU | CPU_HAS_PTEA;
cpu_data->flags |= CPU_HAS_FPU;
break;
case 0x500 ... 0x501:
switch (prr) {
@@ -160,7 +159,7 @@ int __init detect_cpu_and_cache_system(void)
cpu_data->icache.ways = 2;
cpu_data->dcache.ways = 2;
cpu_data->flags |= CPU_HAS_FPU | CPU_HAS_PTEA;
cpu_data->flags |= CPU_HAS_FPU;
break;
default:
@@ -173,6 +172,10 @@ int __init detect_cpu_and_cache_system(void)
cpu_data->dcache.ways = 1;
#endif
#ifdef CONFIG_CPU_HAS_PTEA
cpu_data->flags |= CPU_HAS_PTEA;
#endif
/*
* On anything that's not a direct-mapped cache, look to the CVR
* for I/D-cache specifics.