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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2001 Mike Corrigan & Dave Engebretsen IBM Corporation
4 */
5
6#include <linux/init.h>
7#include <linux/mm.h>
8#include <linux/proc_fs.h>
9#include <linux/kernel.h>
10#include <linux/of.h>
11
12#include <asm/machdep.h>
13#include <asm/vdso_datapage.h>
14#include <asm/rtas.h>
15#include <linux/uaccess.h>
16
17#ifdef CONFIG_PPC64
18
19static loff_t page_map_seek(struct file *file, loff_t off, int whence)
20{
21 return fixed_size_llseek(file, off, whence, PAGE_SIZE);
22}
23
24static ssize_t page_map_read( struct file *file, char __user *buf, size_t nbytes,
25 loff_t *ppos)
26{
27 return simple_read_from_buffer(buf, nbytes, ppos,
28 pde_data(file_inode(file)), PAGE_SIZE);
29}
30
31static int page_map_mmap( struct file *file, struct vm_area_struct *vma )
32{
33 if ((vma->vm_end - vma->vm_start) > PAGE_SIZE)
34 return -EINVAL;
35
36 remap_pfn_range(vma, vma->vm_start,
37 __pa(pde_data(file_inode(file))) >> PAGE_SHIFT,
38 PAGE_SIZE, vma->vm_page_prot);
39 return 0;
40}
41
42static const struct proc_ops page_map_proc_ops = {
43 .proc_lseek = page_map_seek,
44 .proc_read = page_map_read,
45 .proc_mmap = page_map_mmap,
46};
47
48
49static int __init proc_ppc64_init(void)
50{
51 struct proc_dir_entry *pde;
52
53 pde = proc_create_data("powerpc/systemcfg", S_IFREG | 0444, NULL,
54 &page_map_proc_ops, vdso_data);
55 if (!pde)
56 return 1;
57 proc_set_size(pde, PAGE_SIZE);
58
59 return 0;
60}
61__initcall(proc_ppc64_init);
62
63#endif /* CONFIG_PPC64 */
64
65/*
66 * Create the ppc64 and ppc64/rtas directories early. This allows us to
67 * assume that they have been previously created in drivers.
68 */
69static int __init proc_ppc64_create(void)
70{
71 struct proc_dir_entry *root;
72
73 root = proc_mkdir("powerpc", NULL);
74 if (!root)
75 return 1;
76
77#ifdef CONFIG_PPC64
78 if (!proc_symlink("ppc64", NULL, "powerpc"))
79 pr_err("Failed to create link /proc/ppc64 -> /proc/powerpc\n");
80#endif
81
82 if (!of_find_node_by_path("/rtas"))
83 return 0;
84
85 if (!proc_mkdir("rtas", root))
86 return 1;
87
88 if (!proc_symlink("rtas", NULL, "powerpc/rtas"))
89 return 1;
90
91 return 0;
92}
93core_initcall(proc_ppc64_create);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2001 Mike Corrigan & Dave Engebretsen IBM Corporation
4 */
5
6#include <linux/init.h>
7#include <linux/memblock.h>
8#include <linux/mm.h>
9#include <linux/proc_fs.h>
10#include <linux/kernel.h>
11#include <linux/of.h>
12
13#include <asm/machdep.h>
14#include <asm/vdso_datapage.h>
15#include <asm/rtas.h>
16#include <asm/systemcfg.h>
17#include <linux/uaccess.h>
18
19#ifdef CONFIG_PPC64_PROC_SYSTEMCFG
20
21static loff_t page_map_seek(struct file *file, loff_t off, int whence)
22{
23 return fixed_size_llseek(file, off, whence, PAGE_SIZE);
24}
25
26static ssize_t page_map_read( struct file *file, char __user *buf, size_t nbytes,
27 loff_t *ppos)
28{
29 return simple_read_from_buffer(buf, nbytes, ppos,
30 pde_data(file_inode(file)), PAGE_SIZE);
31}
32
33static int page_map_mmap( struct file *file, struct vm_area_struct *vma )
34{
35 if ((vma->vm_end - vma->vm_start) > PAGE_SIZE)
36 return -EINVAL;
37
38 return remap_pfn_range(vma, vma->vm_start,
39 __pa(pde_data(file_inode(file))) >> PAGE_SHIFT,
40 PAGE_SIZE, vma->vm_page_prot);
41}
42
43static const struct proc_ops page_map_proc_ops = {
44 .proc_lseek = page_map_seek,
45 .proc_read = page_map_read,
46 .proc_mmap = page_map_mmap,
47};
48
49static union {
50 struct systemcfg data;
51 u8 page[PAGE_SIZE];
52} systemcfg_data_store __page_aligned_data;
53struct systemcfg *systemcfg = &systemcfg_data_store.data;
54
55static int __init proc_ppc64_init(void)
56{
57 struct proc_dir_entry *pde;
58
59 strcpy((char *)systemcfg->eye_catcher, "SYSTEMCFG:PPC64");
60 systemcfg->version.major = SYSTEMCFG_MAJOR;
61 systemcfg->version.minor = SYSTEMCFG_MINOR;
62 systemcfg->processor = mfspr(SPRN_PVR);
63 /*
64 * Fake the old platform number for pSeries and add
65 * in LPAR bit if necessary
66 */
67 systemcfg->platform = 0x100;
68 if (firmware_has_feature(FW_FEATURE_LPAR))
69 systemcfg->platform |= 1;
70 systemcfg->physicalMemorySize = memblock_phys_mem_size();
71 systemcfg->dcache_size = ppc64_caches.l1d.size;
72 systemcfg->dcache_line_size = ppc64_caches.l1d.line_size;
73 systemcfg->icache_size = ppc64_caches.l1i.size;
74 systemcfg->icache_line_size = ppc64_caches.l1i.line_size;
75
76 pde = proc_create_data("powerpc/systemcfg", S_IFREG | 0444, NULL,
77 &page_map_proc_ops, systemcfg);
78 if (!pde)
79 return 1;
80 proc_set_size(pde, PAGE_SIZE);
81
82 return 0;
83}
84__initcall(proc_ppc64_init);
85
86#endif /* CONFIG_PPC64_PROC_SYSTEMCFG */
87
88/*
89 * Create the ppc64 and ppc64/rtas directories early. This allows us to
90 * assume that they have been previously created in drivers.
91 */
92static int __init proc_ppc64_create(void)
93{
94 struct proc_dir_entry *root;
95
96 root = proc_mkdir("powerpc", NULL);
97 if (!root)
98 return 1;
99
100#ifdef CONFIG_PPC64
101 if (!proc_symlink("ppc64", NULL, "powerpc"))
102 pr_err("Failed to create link /proc/ppc64 -> /proc/powerpc\n");
103#endif
104
105 if (!of_find_node_by_path("/rtas"))
106 return 0;
107
108 if (!proc_mkdir("rtas", root))
109 return 1;
110
111 if (!proc_symlink("rtas", NULL, "powerpc/rtas"))
112 return 1;
113
114 return 0;
115}
116core_initcall(proc_ppc64_create);