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9#include <asm/debugfs.h>
10#include <asm/pgtable.h>
11#include <asm/cpu_has_feature.h>
12
13static char *pp_601(int k, int pp)
14{
15 if (pp == 0)
16 return k ? "NA" : "RWX";
17 if (pp == 1)
18 return k ? "ROX" : "RWX";
19 if (pp == 2)
20 return k ? "RWX" : "RWX";
21 return k ? "ROX" : "ROX";
22}
23
24static void bat_show_601(struct seq_file *m, int idx, u32 lower, u32 upper)
25{
26 u32 blpi = upper & 0xfffe0000;
27 u32 k = (upper >> 2) & 3;
28 u32 pp = upper & 3;
29 phys_addr_t pbn = PHYS_BAT_ADDR(lower);
30 u32 bsm = lower & 0x3ff;
31 u32 size = (bsm + 1) << 17;
32
33 seq_printf(m, "%d: ", idx);
34 if (!(lower & 0x40)) {
35 seq_puts(m, " -\n");
36 return;
37 }
38
39 seq_printf(m, "0x%08x-0x%08x ", blpi, blpi + size - 1);
40#ifdef CONFIG_PHYS_64BIT
41 seq_printf(m, "0x%016llx ", pbn);
42#else
43 seq_printf(m, "0x%08x ", pbn);
44#endif
45
46 seq_printf(m, "Kernel %s User %s", pp_601(k & 2, pp), pp_601(k & 1, pp));
47
48 if (lower & _PAGE_WRITETHRU)
49 seq_puts(m, "write through ");
50 if (lower & _PAGE_NO_CACHE)
51 seq_puts(m, "no cache ");
52 if (lower & _PAGE_COHERENT)
53 seq_puts(m, "coherent ");
54 seq_puts(m, "\n");
55}
56
57#define BAT_SHOW_601(_m, _n, _l, _u) bat_show_601(_m, _n, mfspr(_l), mfspr(_u))
58
59static int bats_show_601(struct seq_file *m, void *v)
60{
61 seq_puts(m, "---[ Block Address Translation ]---\n");
62
63 BAT_SHOW_601(m, 0, SPRN_IBAT0L, SPRN_IBAT0U);
64 BAT_SHOW_601(m, 1, SPRN_IBAT1L, SPRN_IBAT1U);
65 BAT_SHOW_601(m, 2, SPRN_IBAT2L, SPRN_IBAT2U);
66 BAT_SHOW_601(m, 3, SPRN_IBAT3L, SPRN_IBAT3U);
67
68 return 0;
69}
70
71static void bat_show_603(struct seq_file *m, int idx, u32 lower, u32 upper, bool is_d)
72{
73 u32 bepi = upper & 0xfffe0000;
74 u32 bl = (upper >> 2) & 0x7ff;
75 u32 k = upper & 3;
76 phys_addr_t brpn = PHYS_BAT_ADDR(lower);
77 u32 size = (bl + 1) << 17;
78
79 seq_printf(m, "%d: ", idx);
80 if (k == 0) {
81 seq_puts(m, " -\n");
82 return;
83 }
84
85 seq_printf(m, "0x%08x-0x%08x ", bepi, bepi + size - 1);
86#ifdef CONFIG_PHYS_64BIT
87 seq_printf(m, "0x%016llx ", brpn);
88#else
89 seq_printf(m, "0x%08x ", brpn);
90#endif
91
92 if (k == 1)
93 seq_puts(m, "User ");
94 else if (k == 2)
95 seq_puts(m, "Kernel ");
96 else
97 seq_puts(m, "Kernel/User ");
98
99 if (lower & BPP_RX)
100 seq_puts(m, is_d ? "RO " : "EXEC ");
101 else if (lower & BPP_RW)
102 seq_puts(m, is_d ? "RW " : "EXEC ");
103 else
104 seq_puts(m, is_d ? "NA " : "NX ");
105
106 if (lower & _PAGE_WRITETHRU)
107 seq_puts(m, "write through ");
108 if (lower & _PAGE_NO_CACHE)
109 seq_puts(m, "no cache ");
110 if (lower & _PAGE_COHERENT)
111 seq_puts(m, "coherent ");
112 if (lower & _PAGE_GUARDED)
113 seq_puts(m, "guarded ");
114 seq_puts(m, "\n");
115}
116
117#define BAT_SHOW_603(_m, _n, _l, _u, _d) bat_show_603(_m, _n, mfspr(_l), mfspr(_u), _d)
118
119static int bats_show_603(struct seq_file *m, void *v)
120{
121 seq_puts(m, "---[ Instruction Block Address Translation ]---\n");
122
123 BAT_SHOW_603(m, 0, SPRN_IBAT0L, SPRN_IBAT0U, false);
124 BAT_SHOW_603(m, 1, SPRN_IBAT1L, SPRN_IBAT1U, false);
125 BAT_SHOW_603(m, 2, SPRN_IBAT2L, SPRN_IBAT2U, false);
126 BAT_SHOW_603(m, 3, SPRN_IBAT3L, SPRN_IBAT3U, false);
127 if (mmu_has_feature(MMU_FTR_USE_HIGH_BATS)) {
128 BAT_SHOW_603(m, 4, SPRN_IBAT4L, SPRN_IBAT4U, false);
129 BAT_SHOW_603(m, 5, SPRN_IBAT5L, SPRN_IBAT5U, false);
130 BAT_SHOW_603(m, 6, SPRN_IBAT6L, SPRN_IBAT6U, false);
131 BAT_SHOW_603(m, 7, SPRN_IBAT7L, SPRN_IBAT7U, false);
132 }
133
134 seq_puts(m, "\n---[ Data Block Address Translation ]---\n");
135
136 BAT_SHOW_603(m, 0, SPRN_DBAT0L, SPRN_DBAT0U, true);
137 BAT_SHOW_603(m, 1, SPRN_DBAT1L, SPRN_DBAT1U, true);
138 BAT_SHOW_603(m, 2, SPRN_DBAT2L, SPRN_DBAT2U, true);
139 BAT_SHOW_603(m, 3, SPRN_DBAT3L, SPRN_DBAT3U, true);
140 if (mmu_has_feature(MMU_FTR_USE_HIGH_BATS)) {
141 BAT_SHOW_603(m, 4, SPRN_DBAT4L, SPRN_DBAT4U, true);
142 BAT_SHOW_603(m, 5, SPRN_DBAT5L, SPRN_DBAT5U, true);
143 BAT_SHOW_603(m, 6, SPRN_DBAT6L, SPRN_DBAT6U, true);
144 BAT_SHOW_603(m, 7, SPRN_DBAT7L, SPRN_DBAT7U, true);
145 }
146
147 return 0;
148}
149
150static int bats_open(struct inode *inode, struct file *file)
151{
152 if (cpu_has_feature(CPU_FTR_601))
153 return single_open(file, bats_show_601, NULL);
154
155 return single_open(file, bats_show_603, NULL);
156}
157
158static const struct file_operations bats_fops = {
159 .open = bats_open,
160 .read = seq_read,
161 .llseek = seq_lseek,
162 .release = single_release,
163};
164
165static int __init bats_init(void)
166{
167 struct dentry *debugfs_file;
168
169 debugfs_file = debugfs_create_file("block_address_translation", 0400,
170 powerpc_debugfs_root, NULL, &bats_fops);
171 return debugfs_file ? 0 : -ENOMEM;
172}
173device_initcall(bats_init);
174
