2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 1994 Waldorf GMBH
7 * Copyright (C) 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2003 Ralf Baechle
8 * Copyright (C) 1996 Paul M. Antoine
9 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
10 * Copyright (C) 2004 Maciej W. Rozycki
12 #ifndef __ASM_CPU_INFO_H
13 #define __ASM_CPU_INFO_H
15 #include <linux/types.h>
17 #include <asm/cache.h>
20 * Descriptor for a cache
23 unsigned int waysize; /* Bytes per way */
24 unsigned short sets; /* Number of lines per set */
25 unsigned char ways; /* Number of ways */
26 unsigned char linesz; /* Size of line in bytes */
27 unsigned char waybit; /* Bits to select in a cache set */
28 unsigned char flags; /* Flags describing cache properties */
34 #define MIPS_CACHE_NOT_PRESENT 0x00000001
35 #define MIPS_CACHE_VTAG 0x00000002 /* Virtually tagged cache */
36 #define MIPS_CACHE_ALIASES 0x00000004 /* Cache could have aliases */
37 #define MIPS_CACHE_IC_F_DC 0x00000008 /* Ic can refill from D-cache */
38 #define MIPS_IC_SNOOPS_REMOTE 0x00000010 /* Ic snoops remote stores */
39 #define MIPS_CACHE_PINDEX 0x00000020 /* Physically indexed cache */
42 unsigned long udelay_val;
43 unsigned long asid_cache;
46 * Capability and feature descriptor structure for MIPS CPU
48 unsigned long options;
50 unsigned int processor_id;
55 struct cache_desc icache; /* Primary I-cache */
56 struct cache_desc dcache; /* Primary D or combined I/D cache */
57 struct cache_desc scache; /* Secondary cache */
58 struct cache_desc tcache; /* Tertiary/split secondary cache */
59 int srsets; /* Shadow register sets */
60 int core; /* physical core number */
61 #if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_MIPS_MT_SMTC)
63 * In the MIPS MT "SMTC" model, each TC is considered
64 * to be a "CPU" for the purposes of scheduling, but
65 * exception resources, ASID spaces, etc, are common
66 * to all TCs within the same VPE.
68 int vpe_id; /* Virtual Processor number */
70 #ifdef CONFIG_MIPS_MT_SMTC
71 int tc_id; /* Thread Context number */
73 void *data; /* Additional data */
74 unsigned int watch_reg_count; /* Number that exist */
75 unsigned int watch_reg_use_cnt; /* Usable by ptrace */
76 #define NUM_WATCH_REGS 4
77 u16 watch_reg_masks[NUM_WATCH_REGS];
78 } __attribute__((aligned(SMP_CACHE_BYTES)));
80 extern struct cpuinfo_mips cpu_data[];
81 #define current_cpu_data cpu_data[smp_processor_id()]
82 #define raw_current_cpu_data cpu_data[raw_smp_processor_id()]
84 extern void cpu_probe(void);
85 extern void cpu_report(void);
87 extern const char *__cpu_name[];
88 #define cpu_name_string() __cpu_name[smp_processor_id()]
90 #endif /* __ASM_CPU_INFO_H */