1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * mbus.h: Various defines for MBUS modules.
4 *
5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
6 */
7
8 #ifndef _SPARC_MBUS_H
9 #define _SPARC_MBUS_H
10
11 #include <asm/ross.h> /* HyperSparc stuff */
12 #include <asm/viking.h> /* Ugh, bug city... */
13
14 enum mbus_module {
15 HyperSparc = 0,
16 Swift_ok = 4,
17 Swift_bad_c = 5,
18 Swift_lots_o_bugs = 6,
19 Tsunami = 7,
20 Viking_12 = 8,
21 Viking_2x = 9,
22 Viking_30 = 10,
23 Viking_35 = 11,
24 Viking_new = 12,
25 TurboSparc = 13,
26 SRMMU_INVAL_MOD = 14,
27 };
28
29 extern enum mbus_module srmmu_modtype;
30 extern unsigned int viking_rev, swift_rev, cypress_rev;
31
32 /* HW Mbus module bugs we have to deal with */
33 #define HWBUG_COPYBACK_BROKEN 0x00000001
34 #define HWBUG_ASIFLUSH_BROKEN 0x00000002
35 #define HWBUG_VACFLUSH_BITROT 0x00000004
36 #define HWBUG_KERN_ACCBROKEN 0x00000008
37 #define HWBUG_KERN_CBITBROKEN 0x00000010
38 #define HWBUG_MODIFIED_BITROT 0x00000020
39 #define HWBUG_PC_BADFAULT_ADDR 0x00000040
40 #define HWBUG_SUPERSCALAR_BAD 0x00000080
41 #define HWBUG_PACINIT_BITROT 0x00000100
42
43 /* First the module type values. To find out which you have, just load
44 * the mmu control register from ASI_M_MMUREG alternate address space and
45 * shift the value right 28 bits.
46 */
47 /* IMPL field means the company which produced the chip. */
48 #define MBUS_VIKING 0x4 /* bleech, Texas Instruments Module */
49 #define MBUS_LSI 0x3 /* LSI Logics */
50 #define MBUS_ROSS 0x1 /* Ross is nice */
51 #define MBUS_FMI 0x0 /* Fujitsu Microelectronics/Swift */
52
53 /* Ross Module versions */
54 #define ROSS_604_REV_CDE 0x0 /* revisions c, d, and e */
55 #define ROSS_604_REV_F 0x1 /* revision f */
56 #define ROSS_605 0xf /* revision a, a.1, and a.2 */
57 #define ROSS_605_REV_B 0xe /* revision b */
58
59 /* TI Viking Module versions */
60 #define VIKING_REV_12 0x1 /* Version 1.2 or SPARCclassic's CPU */
61 #define VIKING_REV_2 0x2 /* Version 2.1, 2.2, 2.3, and 2.4 */
62 #define VIKING_REV_30 0x3 /* Version 3.0 */
63 #define VIKING_REV_35 0x4 /* Version 3.5 */
64
65 /* LSI Logics. */
66 #define LSI_L64815 0x0
67
68 /* Fujitsu */
69 #define FMI_AURORA 0x4 /* MB8690x, a Swift module... */
70 #define FMI_TURBO 0x5 /* MB86907, a TurboSparc module... */
71
72 /* For multiprocessor support we need to be able to obtain the CPU id and
73 * the MBUS Module id.
74 */
75
76 /* The CPU ID is encoded in the trap base register, 20 bits to the left of
77 * bit zero, with 2 bits being significant.
78 */
79 #define TBR_ID_SHIFT 20
80
81 static inline int get_cpuid(void)
82 {
83 register int retval;
84 __asm__ __volatile__("rd %%tbr, %0\n\t"
85 "srl %0, %1, %0\n\t" :
86 "=r" (retval) :
87 "i" (TBR_ID_SHIFT));
88 return (retval & 3);
89 }
90
91 static inline int get_modid(void)
92 {
93 return (get_cpuid() | 0x8);
94 }
95
96
97 #endif /* !(_SPARC_MBUS_H) */