/* * arch/sh/kernel/cpu/sh5/probe.c * * CPU Subtype Probing for SH-5. * * Copyright (C) 2000, 2001 Paolo Alberelli * Copyright (C) 2003 - 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 <linux/io.h> #include <linux/string.h> #include <asm/processor.h> #include <asm/cache.h> #include <asm/tlb.h>
void cpu_probe(void) { unsigned long long cir; /* * Do peeks in real mode to avoid having to set up a mapping for * the WPC registers. On SH5-101 cut2, such a mapping would be * exposed to an address translation erratum which would make it * hard to set up correctly. */ cir = peek_real_address_q(0x0d000008); if ((cir & 0xffff) == 0x5103) boot_cpu_data.type = CPU_SH5_103; else if (((cir >> 32) & 0xffff) == 0x51e2) /* CPU.VCR aliased at CIR address on SH5-101 */ boot_cpu_data.type = CPU_SH5_101; boot_cpu_data.family = CPU_FAMILY_SH5; /* * First, setup some sane values for the I-cache. */ boot_cpu_data.icache.ways = 4; boot_cpu_data.icache.sets = 256; boot_cpu_data.icache.linesz = L1_CACHE_BYTES; boot_cpu_data.icache.way_incr = (1 << 13); boot_cpu_data.icache.entry_shift = 5; boot_cpu_data.icache.way_size = boot_cpu_data.icache.sets * boot_cpu_data.icache.linesz; boot_cpu_data.icache.entry_mask = 0x1fe0; boot_cpu_data.icache.flags = 0; /* * Next, setup some sane values for the D-cache. * * On the SH5, these are pretty consistent with the I-cache settings, * so we just copy over the existing definitions.. these can be fixed * up later, especially if we add runtime CPU probing. * * Though in the meantime it saves us from having to duplicate all of * the above definitions.. */ boot_cpu_data.dcache = boot_cpu_data.icache; /* * Setup any cache-related flags here */ #if defined(CONFIG_CACHE_WRITETHROUGH) set_bit(SH_CACHE_MODE_WT, &(boot_cpu_data.dcache.flags)); #elif defined(CONFIG_CACHE_WRITEBACK) set_bit(SH_CACHE_MODE_WB, &(boot_cpu_data.dcache.flags)); #endif /* Setup some I/D TLB defaults */ sh64_tlb_init(); }Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Paul Mundt | 199 | 100.00% | 5 | 100.00% |
| Total | 199 | 100.00% | 5 | 100.00% |
| Person | Tokens | Prop | Commits | CommitProp |
| Paul Mundt | 218 | 100.00% | 5 | 100.00% |
| Total | 218 | 100.00% | 5 | 100.00% |