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9#include <linux/ctype.h>
10#include <linux/module.h>
11#include <linux/kernel.h>
12#include <linux/init.h>
13#include <linux/proc_fs.h>
14#include <linux/seq_file.h>
15#include <linux/uaccess.h>
16
17#include <asm/cplbinit.h>
18#include <asm/blackfin.h>
19
20static char const page_strtbl[][4] = {
21 "1K", "4K", "1M", "4M",
22#ifdef CONFIG_BF60x
23 "16K", "64K", "16M", "64M",
24#endif
25};
26#define page(flags) (((flags) & 0x70000) >> 16)
27#define strpage(flags) page_strtbl[page(flags)]
28
29struct cplbinfo_data {
30 loff_t pos;
31 char cplb_type;
32 u32 mem_control;
33 struct cplb_entry *tbl;
34 int switched;
35};
36
37static void cplbinfo_print_header(struct seq_file *m)
38{
39 seq_printf(m, "Index\tAddress\t\tData\tSize\tU/RD\tU/WR\tS/WR\tSwitch\n");
40}
41
42static int cplbinfo_nomore(struct cplbinfo_data *cdata)
43{
44 return cdata->pos >= MAX_CPLBS;
45}
46
47static int cplbinfo_show(struct seq_file *m, void *p)
48{
49 struct cplbinfo_data *cdata;
50 unsigned long data, addr;
51 loff_t pos;
52
53 cdata = p;
54 pos = cdata->pos;
55 addr = cdata->tbl[pos].addr;
56 data = cdata->tbl[pos].data;
57
58 seq_printf(m,
59 "%d\t0x%08lx\t%05lx\t%s\t%c\t%c\t%c\t%c\n",
60 (int)pos, addr, data, strpage(data),
61 (data & CPLB_USER_RD) ? 'Y' : 'N',
62 (data & CPLB_USER_WR) ? 'Y' : 'N',
63 (data & CPLB_SUPV_WR) ? 'Y' : 'N',
64 pos < cdata->switched ? 'N' : 'Y');
65
66 return 0;
67}
68
69static void cplbinfo_seq_init(struct cplbinfo_data *cdata, unsigned int cpu)
70{
71 if (cdata->cplb_type == 'I') {
72 cdata->mem_control = bfin_read_IMEM_CONTROL();
73 cdata->tbl = icplb_tbl[cpu];
74 cdata->switched = first_switched_icplb;
75 } else {
76 cdata->mem_control = bfin_read_DMEM_CONTROL();
77 cdata->tbl = dcplb_tbl[cpu];
78 cdata->switched = first_switched_dcplb;
79 }
80}
81
82static void *cplbinfo_start(struct seq_file *m, loff_t *pos)
83{
84 struct cplbinfo_data *cdata = m->private;
85
86 if (!*pos) {
87 seq_printf(m, "%cCPLBs are %sabled: 0x%x\n", cdata->cplb_type,
88 (cdata->mem_control & ENDCPLB ? "en" : "dis"),
89 cdata->mem_control);
90 cplbinfo_print_header(m);
91 } else if (cplbinfo_nomore(cdata))
92 return NULL;
93
94 get_cpu();
95 return cdata;
96}
97
98static void *cplbinfo_next(struct seq_file *m, void *p, loff_t *pos)
99{
100 struct cplbinfo_data *cdata = p;
101 cdata->pos = ++(*pos);
102 if (cplbinfo_nomore(cdata))
103 return NULL;
104 else
105 return cdata;
106}
107
108static void cplbinfo_stop(struct seq_file *m, void *p)
109{
110 put_cpu();
111}
112
113static const struct seq_operations cplbinfo_sops = {
114 .start = cplbinfo_start,
115 .next = cplbinfo_next,
116 .stop = cplbinfo_stop,
117 .show = cplbinfo_show,
118};
119
120#define CPLBINFO_DCPLB_FLAG 0x80000000
121
122static int cplbinfo_open(struct inode *inode, struct file *file)
123{
124 char cplb_type;
125 unsigned int cpu = (unsigned long)PDE_DATA(file_inode(file));
126 int ret;
127 struct seq_file *m;
128 struct cplbinfo_data *cdata;
129
130 cplb_type = cpu & CPLBINFO_DCPLB_FLAG ? 'D' : 'I';
131 cpu &= ~CPLBINFO_DCPLB_FLAG;
132
133 if (!cpu_online(cpu))
134 return -ENODEV;
135
136 ret = seq_open_private(file, &cplbinfo_sops, sizeof(*cdata));
137 if (ret)
138 return ret;
139 m = file->private_data;
140 cdata = m->private;
141
142 cdata->pos = 0;
143 cdata->cplb_type = cplb_type;
144 cplbinfo_seq_init(cdata, cpu);
145
146 return 0;
147}
148
149static const struct file_operations cplbinfo_fops = {
150 .open = cplbinfo_open,
151 .read = seq_read,
152 .llseek = seq_lseek,
153 .release = seq_release_private,
154};
155
156static int __init cplbinfo_init(void)
157{
158 struct proc_dir_entry *cplb_dir, *cpu_dir;
159 char buf[10];
160 unsigned int cpu;
161
162 cplb_dir = proc_mkdir("cplbinfo", NULL);
163 if (!cplb_dir)
164 return -ENOMEM;
165
166 for_each_possible_cpu(cpu) {
167 sprintf(buf, "cpu%i", cpu);
168 cpu_dir = proc_mkdir(buf, cplb_dir);
169 if (!cpu_dir)
170 return -ENOMEM;
171
172 proc_create_data("icplb", S_IRUGO, cpu_dir, &cplbinfo_fops,
173 (void *)cpu);
174 proc_create_data("dcplb", S_IRUGO, cpu_dir, &cplbinfo_fops,
175 (void *)(cpu | CPLBINFO_DCPLB_FLAG));
176 }
177
178 return 0;
179}
180late_initcall(cplbinfo_init);
181
