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1 /*
2 * PowerNV XSCOM Bus
3 *
4 * Copyright (c) 2024, IBM Corporation.
5 *
6 * SPDX-License-Identifier: GPL-2.0-or-later
7 */
8
9 #ifndef PNV_XSCOM_H
10 #define PNV_XSCOM_H
11
12 #define SMT 4 /* some tests will break if less than 4 */
13
14 typedef enum PnvChipType {
15 PNV_CHIP_POWER8, /* AKA Venice */
16 PNV_CHIP_POWER9, /* AKA Nimbus */
17 PNV_CHIP_POWER10,
18 PNV_CHIP_POWER11,
19 } PnvChipType;
20
21 typedef struct PnvChip {
22 PnvChipType chip_type;
23 const char *cpu_model;
24 uint64_t xscom_base;
25 uint64_t cfam_id;
26 uint32_t first_core;
27 uint32_t num_i2c;
28 } PnvChip;
29
30 static const PnvChip pnv_chips[] = {
31 {
32 .chip_type = PNV_CHIP_POWER8,
33 .cpu_model = "POWER8",
34 .xscom_base = 0x0003fc0000000000ull,
35 .cfam_id = 0x220ea04980000000ull,
36 .first_core = 0x1,
37 .num_i2c = 0,
38 },
39 {
40 .chip_type = PNV_CHIP_POWER9,
41 .cpu_model = "POWER9",
42 .xscom_base = 0x000603fc00000000ull,
43 .cfam_id = 0x220d104900008000ull,
44 .first_core = 0x0,
45 .num_i2c = 4,
46 },
47 {
48 .chip_type = PNV_CHIP_POWER10,
49 .cpu_model = "POWER10",
50 .xscom_base = 0x000603fc00000000ull,
51 .cfam_id = 0x220da04980000000ull,
52 .first_core = 0x0,
53 .num_i2c = 4,
54 },
55 {
56 .chip_type = PNV_CHIP_POWER11,
57 .cpu_model = "Power11",
58 .xscom_base = 0x000603fc00000000ull,
59 .cfam_id = 0x220da04980000000ull,
60 .first_core = 0x0,
61 .num_i2c = 0,
62 },
63 };
64
65 static inline uint64_t pnv_xscom_addr(const PnvChip *chip, uint32_t pcba)
66 {
67 uint64_t addr = chip->xscom_base;
68
69 if ((chip->chip_type == PNV_CHIP_POWER11) ||
70 (chip->chip_type == PNV_CHIP_POWER10) ||
71 (chip->chip_type == PNV_CHIP_POWER9)) {
72 addr |= ((uint64_t) pcba << 3);
73 } else {
74 addr |= (((uint64_t) pcba << 4) & ~0xffull) |
75 (((uint64_t) pcba << 3) & 0x78);
76 }
77 return addr;
78 }
79
80 static const char *pnv_get_machine_type(enum PnvChipType chip_type)
81 {
82 static const char *const machine_types[] = {
83 [PNV_CHIP_POWER8] = "powernv8",
84 [PNV_CHIP_POWER9] = "powernv9",
85 [PNV_CHIP_POWER10] = "powernv10",
86 [PNV_CHIP_POWER11] = "powernv11",
87 };
88
89 g_assert(chip_type <= PNV_CHIP_POWER11);
90
91 return machine_types[chip_type];
92 }
93
94 #endif /* PNV_XSCOM_H */