fanotify: disallow mount/sb marks on kernel internal pseudo fs
[sfrench/cifs-2.6.git] / arch / sh / kernel / cpu / sh2 / probe.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * arch/sh/kernel/cpu/sh2/probe.c
4  *
5  * CPU Subtype Probing for SH-2.
6  *
7  * Copyright (C) 2002 Paul Mundt
8  */
9 #include <linux/init.h>
10 #include <linux/of_fdt.h>
11 #include <linux/smp.h>
12 #include <linux/io.h>
13 #include <asm/processor.h>
14 #include <asm/cache.h>
15
16 #if defined(CONFIG_CPU_J2)
17 extern u32 __iomem *j2_ccr_base;
18 static int __init scan_cache(unsigned long node, const char *uname,
19                              int depth, void *data)
20 {
21         if (!of_flat_dt_is_compatible(node, "jcore,cache"))
22                 return 0;
23
24         j2_ccr_base = (u32 __iomem *)of_flat_dt_translate_address(node);
25
26         return 1;
27 }
28 #endif
29
30 void __ref cpu_probe(void)
31 {
32 #if defined(CONFIG_CPU_SUBTYPE_SH7619)
33         boot_cpu_data.type                      = CPU_SH7619;
34         boot_cpu_data.dcache.ways               = 4;
35         boot_cpu_data.dcache.way_incr   = (1<<12);
36         boot_cpu_data.dcache.sets               = 256;
37         boot_cpu_data.dcache.entry_shift        = 4;
38         boot_cpu_data.dcache.linesz             = L1_CACHE_BYTES;
39         boot_cpu_data.dcache.flags              = 0;
40 #endif
41
42 #if defined(CONFIG_CPU_J2)
43 #if defined(CONFIG_SMP)
44         unsigned cpu = hard_smp_processor_id();
45 #else
46         unsigned cpu = 0;
47 #endif
48         if (cpu == 0) of_scan_flat_dt(scan_cache, NULL);
49         if (j2_ccr_base) __raw_writel(0x80000303, j2_ccr_base + 4*cpu);
50         if (cpu != 0) return;
51         boot_cpu_data.type                      = CPU_J2;
52
53         /* These defaults are appropriate for the original/current
54          * J2 cache. Once there is a proper framework for getting cache
55          * info from device tree, we should switch to that. */
56         boot_cpu_data.dcache.ways               = 1;
57         boot_cpu_data.dcache.sets               = 256;
58         boot_cpu_data.dcache.entry_shift        = 5;
59         boot_cpu_data.dcache.linesz             = 32;
60         boot_cpu_data.dcache.flags              = 0;
61
62         boot_cpu_data.flags |= CPU_HAS_CAS_L;
63 #else
64         /*
65          * SH-2 doesn't have separate caches
66          */
67         boot_cpu_data.dcache.flags |= SH_CACHE_COMBINED;
68 #endif
69         boot_cpu_data.icache = boot_cpu_data.dcache;
70         boot_cpu_data.family = CPU_FAMILY_SH2;
71 }