e82da214d2
This adds a family member to struct sh_cpuinfo, which allows us to fall back more on the probe routines to work out what sort of subtype we are running on. This will be used by the CPU cache initialization code in order to first do family-level initialization, followed by subtype-level optimizations. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
/*
|
|
* arch/sh/kernel/cpu/sh2a/probe.c
|
|
*
|
|
* CPU Subtype Probing for SH-2A.
|
|
*
|
|
* Copyright (C) 2004 - 2007 Paul Mundt
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/cache.h>
|
|
|
|
int __init detect_cpu_and_cache_system(void)
|
|
{
|
|
boot_cpu_data.family = CPU_FAMILY_SH2A;
|
|
|
|
/* All SH-2A CPUs have support for 16 and 32-bit opcodes.. */
|
|
boot_cpu_data.flags |= CPU_HAS_OP32;
|
|
|
|
#if defined(CONFIG_CPU_SUBTYPE_SH7201)
|
|
boot_cpu_data.type = CPU_SH7201;
|
|
boot_cpu_data.flags |= CPU_HAS_FPU;
|
|
#elif defined(CONFIG_CPU_SUBTYPE_SH7203)
|
|
boot_cpu_data.type = CPU_SH7203;
|
|
boot_cpu_data.flags |= CPU_HAS_FPU;
|
|
#elif defined(CONFIG_CPU_SUBTYPE_SH7263)
|
|
boot_cpu_data.type = CPU_SH7263;
|
|
boot_cpu_data.flags |= CPU_HAS_FPU;
|
|
#elif defined(CONFIG_CPU_SUBTYPE_SH7206)
|
|
boot_cpu_data.type = CPU_SH7206;
|
|
boot_cpu_data.flags |= CPU_HAS_DSP;
|
|
#elif defined(CONFIG_CPU_SUBTYPE_MXG)
|
|
boot_cpu_data.type = CPU_MXG;
|
|
boot_cpu_data.flags |= CPU_HAS_DSP;
|
|
#endif
|
|
|
|
boot_cpu_data.dcache.ways = 4;
|
|
boot_cpu_data.dcache.way_incr = (1 << 11);
|
|
boot_cpu_data.dcache.sets = 128;
|
|
boot_cpu_data.dcache.entry_shift = 4;
|
|
boot_cpu_data.dcache.linesz = L1_CACHE_BYTES;
|
|
boot_cpu_data.dcache.flags = 0;
|
|
|
|
/*
|
|
* The icache is the same as the dcache as far as this setup is
|
|
* concerned. The only real difference in hardware is that the icache
|
|
* lacks the U bit that the dcache has, none of this has any bearing
|
|
* on the cache info.
|
|
*/
|
|
boot_cpu_data.icache = boot_cpu_data.dcache;
|
|
|
|
return 0;
|
|
}
|