Commit | Line | Data |
---|---|---|
081860b9 GR |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. | |
3 | ||
4 | #include <linux/of.h> | |
5 | #include <linux/init.h> | |
6 | #include <linux/seq_file.h> | |
7 | #include <linux/memblock.h> | |
8 | ||
9 | #include <abi/reg_ops.h> | |
10 | ||
11 | static void percpu_print(void *arg) | |
12 | { | |
13 | struct seq_file *m = (struct seq_file *)arg; | |
14 | unsigned int cur, next, i; | |
15 | ||
16 | seq_printf(m, "processor : %d\n", smp_processor_id()); | |
17 | seq_printf(m, "C-SKY CPU model : %s\n", CSKYCPU_DEF_NAME); | |
18 | ||
19 | /* read processor id, max is 100 */ | |
20 | cur = mfcr("cr13"); | |
21 | for (i = 0; i < 100; i++) { | |
22 | seq_printf(m, "product info[%d] : 0x%08x\n", i, cur); | |
23 | ||
24 | next = mfcr("cr13"); | |
25 | ||
26 | /* some CPU only has one id reg */ | |
27 | if (cur == next) | |
28 | break; | |
29 | ||
30 | cur = next; | |
31 | ||
32 | /* cpid index is 31-28, reset */ | |
33 | if (!(next >> 28)) { | |
34 | while ((mfcr("cr13") >> 28) != i); | |
35 | break; | |
36 | } | |
37 | } | |
38 | ||
39 | /* CPU feature regs, setup by bootloader or gdbinit */ | |
40 | seq_printf(m, "hint (CPU funcs): 0x%08x\n", mfcr_hint()); | |
41 | seq_printf(m, "ccr (L1C & MMU): 0x%08x\n", mfcr("cr18")); | |
42 | seq_printf(m, "ccr2 (L2C) : 0x%08x\n", mfcr_ccr2()); | |
43 | seq_printf(m, "\n"); | |
44 | } | |
45 | ||
46 | static int c_show(struct seq_file *m, void *v) | |
47 | { | |
48 | int cpu; | |
49 | ||
50 | for_each_online_cpu(cpu) | |
51 | smp_call_function_single(cpu, percpu_print, m, true); | |
52 | ||
53 | #ifdef CSKY_ARCH_VERSION | |
54 | seq_printf(m, "arch-version : %s\n", CSKY_ARCH_VERSION); | |
55 | seq_printf(m, "\n"); | |
56 | #endif | |
57 | ||
58 | return 0; | |
59 | } | |
60 | ||
61 | static void *c_start(struct seq_file *m, loff_t *pos) | |
62 | { | |
63 | return *pos < 1 ? (void *)1 : NULL; | |
64 | } | |
65 | ||
66 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
67 | { | |
68 | ++*pos; | |
69 | return NULL; | |
70 | } | |
71 | ||
72 | static void c_stop(struct seq_file *m, void *v) {} | |
73 | ||
74 | const struct seq_operations cpuinfo_op = { | |
75 | .start = c_start, | |
76 | .next = c_next, | |
77 | .stop = c_stop, | |
78 | .show = c_show, | |
79 | }; |