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/*
* cpu.h: Values of the PRId register used to match up
* various MIPS cpu types.
*
* Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
*/
#ifndef _ASM_CPU_H
#define _ASM_CPU_H
#include <asm/cache.h>
/* Assigned Company values for bits 23:16 of the PRId Register
(CP0 register 15, select 0). As of the MIPS32 and MIPS64 specs from
MTI, the PRId register is defined in this (backwards compatible)
way:
+----------------+----------------+----------------+----------------+
| Company Options| Company ID | Processor ID | Revision |
+----------------+----------------+----------------+----------------+
31 24 23 16 15 8 7
I don't have docs for all the previous processors, but my impression is
that bits 16-23 have been 0 for all MIPS processors before the MIPS32/64
spec.
*/
#define PRID_COMP_LEGACY 0x000000
#define PRID_COMP_MIPS 0x010000
/*
* Don't know who should be here...QED and Sandcraft, maybe?
*/
#define PRID_COMP_SIBYTE 0x040000
/*
* Assigned values for the product ID register. In order to detect a
* certain CPU type exactly eventually additional registers may need to
* be examined. These are valid when 23:16 == PRID_COMP_LEGACY
*/
#define PRID_IMP_R2000 0x0100
#define PRID_IMP_R3000 0x0200 /* Same as R2000A */
#define PRID_IMP_R6000 0x0300 /* Same as R3000A */
#define PRID_IMP_R4000 0x0400
#define PRID_IMP_R6000A 0x0600
#define PRID_IMP_R10000 0x0900
#define PRID_IMP_R4300 0x0b00
#define PRID_IMP_R12000 0x0e00
#define PRID_IMP_R8000 0x1000
#define PRID_IMP_R4600 0x2000
#define PRID_IMP_R4700 0x2100
#define PRID_IMP_R3912 0x2200
#define PRID_IMP_R4640 0x2200
#define PRID_IMP_R4650 0x2200 /* Same as R4640 */
#define PRID_IMP_R5000 0x2300
#define PRID_IMP_R5432 0x5400
#define PRID_IMP_SONIC 0x2400
#define PRID_IMP_MAGIC 0x2500
#define PRID_IMP_RM7000 0x2700
#define PRID_IMP_NEVADA 0x2800 /* RM5260 ??? */
#define PRID_IMP_4KC 0x8000
#define PRID_IMP_5KC 0x8100
#define PRID_IMP_UNKNOWN 0xff00
/*
* These are the PRID's for when 23:16 == PRID_COMP_SIBYTE
*/
#define PRID_IMP_SB1 0x0100
/*
* Definitions for 7:0 on legacy processors
*/
#define PRID_REV_R4400 0x0040
#define PRID_REV_R3000A 0x0030
#define PRID_REV_R3000 0x0020
#define PRID_REV_R2000A 0x0010
#define PRID_REV_R3912 0x0010
#ifndef _LANGUAGE_ASSEMBLY
/*
* Capability and feature descriptor structure for MIPS CPU
*/
struct mips_cpu {
unsigned int processor_id;
unsigned int cputype; /* Old "mips_cputype" code */
int isa_level;
int options;
int tlbsize;
struct cache_desc icache; /* Primary I-cache */
struct cache_desc dcache; /* Primary D or combined I/D cache */
struct cache_desc scache; /* Secondary cache */
struct cache_desc tcache; /* Tertiary/split secondary cache */
};
#endif
/*
* ISA Level encodings
*/
#define MIPS_CPU_ISA_I 0x00000001
#define MIPS_CPU_ISA_II 0x00000002
#define MIPS_CPU_ISA_III 0x00000003
#define MIPS_CPU_ISA_IV 0x00000004
#define MIPS_CPU_ISA_V 0x00000005
#define MIPS_CPU_ISA_M32 0x00000020
#define MIPS_CPU_ISA_M64 0x00000040
/*
* CPU Option encodings
*/
#define MIPS_CPU_TLB 0x00000001 /* CPU has TLB */
/* Leave a spare bit for variant MMU types... */
#define MIPS_CPU_4KEX 0x00000004 /* "R4K" exception model */
#define MIPS_CPU_4KTLB 0x00000008 /* "R4K" TLB handler */
#define MIPS_CPU_FPU 0x00000010 /* CPU has FPU */
#define MIPS_CPU_32FPR 0x00000020 /* 32 dbl. prec. FP registers */
#define MIPS_CPU_COUNTER 0x00000040 /* Cycle count/compare */
#define MIPS_CPU_WATCH 0x00000080 /* watchpoint registers */
#define MIPS_CPU_MIPS16 0x00000100 /* code compression */
#define MIPS_CPU_DIVEC 0x00000200 /* dedicated interrupt vector */
#define MIPS_CPU_VCE 0x00000400 /* virt. coherence conflict possible */
#define MIPS_CPU_CACHE_CDEX 0x00000800 /* Create_Dirty_Exclusive CACHE op */
#endif /* _ASM_CPU_H */
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