1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0+
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright 2018, Christophe Leroy CS S.I.
4*4882a593Smuzhiyun * <christophe.leroy@c-s.fr>
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * This dumps the content of BATS
7*4882a593Smuzhiyun */
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <linux/pgtable.h>
10*4882a593Smuzhiyun #include <asm/debugfs.h>
11*4882a593Smuzhiyun #include <asm/cpu_has_feature.h>
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #include "ptdump.h"
14*4882a593Smuzhiyun
bat_show_603(struct seq_file * m,int idx,u32 lower,u32 upper,bool is_d)15*4882a593Smuzhiyun static void bat_show_603(struct seq_file *m, int idx, u32 lower, u32 upper, bool is_d)
16*4882a593Smuzhiyun {
17*4882a593Smuzhiyun u32 bepi = upper & 0xfffe0000;
18*4882a593Smuzhiyun u32 bl = (upper >> 2) & 0x7ff;
19*4882a593Smuzhiyun u32 k = upper & 3;
20*4882a593Smuzhiyun phys_addr_t brpn = PHYS_BAT_ADDR(lower);
21*4882a593Smuzhiyun u32 size = (bl + 1) << 17;
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun seq_printf(m, "%d: ", idx);
24*4882a593Smuzhiyun if (k == 0) {
25*4882a593Smuzhiyun seq_puts(m, " -\n");
26*4882a593Smuzhiyun return;
27*4882a593Smuzhiyun }
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun seq_printf(m, "0x%08x-0x%08x ", bepi, bepi + size - 1);
30*4882a593Smuzhiyun #ifdef CONFIG_PHYS_64BIT
31*4882a593Smuzhiyun seq_printf(m, "0x%016llx ", brpn);
32*4882a593Smuzhiyun #else
33*4882a593Smuzhiyun seq_printf(m, "0x%08x ", brpn);
34*4882a593Smuzhiyun #endif
35*4882a593Smuzhiyun pt_dump_size(m, size);
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun if (k == 1)
38*4882a593Smuzhiyun seq_puts(m, "User ");
39*4882a593Smuzhiyun else if (k == 2)
40*4882a593Smuzhiyun seq_puts(m, "Kernel ");
41*4882a593Smuzhiyun else
42*4882a593Smuzhiyun seq_puts(m, "Kernel/User ");
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun if (lower & BPP_RX)
45*4882a593Smuzhiyun seq_puts(m, is_d ? "r " : " x ");
46*4882a593Smuzhiyun else if (lower & BPP_RW)
47*4882a593Smuzhiyun seq_puts(m, is_d ? "rw " : " x ");
48*4882a593Smuzhiyun else
49*4882a593Smuzhiyun seq_puts(m, is_d ? " " : " ");
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun seq_puts(m, lower & _PAGE_WRITETHRU ? "w " : " ");
52*4882a593Smuzhiyun seq_puts(m, lower & _PAGE_NO_CACHE ? "i " : " ");
53*4882a593Smuzhiyun seq_puts(m, lower & _PAGE_COHERENT ? "m " : " ");
54*4882a593Smuzhiyun seq_puts(m, lower & _PAGE_GUARDED ? "g " : " ");
55*4882a593Smuzhiyun seq_puts(m, "\n");
56*4882a593Smuzhiyun }
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun #define BAT_SHOW_603(_m, _n, _l, _u, _d) bat_show_603(_m, _n, mfspr(_l), mfspr(_u), _d)
59*4882a593Smuzhiyun
bats_show_603(struct seq_file * m,void * v)60*4882a593Smuzhiyun static int bats_show_603(struct seq_file *m, void *v)
61*4882a593Smuzhiyun {
62*4882a593Smuzhiyun seq_puts(m, "---[ Instruction Block Address Translation ]---\n");
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun BAT_SHOW_603(m, 0, SPRN_IBAT0L, SPRN_IBAT0U, false);
65*4882a593Smuzhiyun BAT_SHOW_603(m, 1, SPRN_IBAT1L, SPRN_IBAT1U, false);
66*4882a593Smuzhiyun BAT_SHOW_603(m, 2, SPRN_IBAT2L, SPRN_IBAT2U, false);
67*4882a593Smuzhiyun BAT_SHOW_603(m, 3, SPRN_IBAT3L, SPRN_IBAT3U, false);
68*4882a593Smuzhiyun if (mmu_has_feature(MMU_FTR_USE_HIGH_BATS)) {
69*4882a593Smuzhiyun BAT_SHOW_603(m, 4, SPRN_IBAT4L, SPRN_IBAT4U, false);
70*4882a593Smuzhiyun BAT_SHOW_603(m, 5, SPRN_IBAT5L, SPRN_IBAT5U, false);
71*4882a593Smuzhiyun BAT_SHOW_603(m, 6, SPRN_IBAT6L, SPRN_IBAT6U, false);
72*4882a593Smuzhiyun BAT_SHOW_603(m, 7, SPRN_IBAT7L, SPRN_IBAT7U, false);
73*4882a593Smuzhiyun }
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun seq_puts(m, "\n---[ Data Block Address Translation ]---\n");
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun BAT_SHOW_603(m, 0, SPRN_DBAT0L, SPRN_DBAT0U, true);
78*4882a593Smuzhiyun BAT_SHOW_603(m, 1, SPRN_DBAT1L, SPRN_DBAT1U, true);
79*4882a593Smuzhiyun BAT_SHOW_603(m, 2, SPRN_DBAT2L, SPRN_DBAT2U, true);
80*4882a593Smuzhiyun BAT_SHOW_603(m, 3, SPRN_DBAT3L, SPRN_DBAT3U, true);
81*4882a593Smuzhiyun if (mmu_has_feature(MMU_FTR_USE_HIGH_BATS)) {
82*4882a593Smuzhiyun BAT_SHOW_603(m, 4, SPRN_DBAT4L, SPRN_DBAT4U, true);
83*4882a593Smuzhiyun BAT_SHOW_603(m, 5, SPRN_DBAT5L, SPRN_DBAT5U, true);
84*4882a593Smuzhiyun BAT_SHOW_603(m, 6, SPRN_DBAT6L, SPRN_DBAT6U, true);
85*4882a593Smuzhiyun BAT_SHOW_603(m, 7, SPRN_DBAT7L, SPRN_DBAT7U, true);
86*4882a593Smuzhiyun }
87*4882a593Smuzhiyun
88*4882a593Smuzhiyun return 0;
89*4882a593Smuzhiyun }
90*4882a593Smuzhiyun
bats_open(struct inode * inode,struct file * file)91*4882a593Smuzhiyun static int bats_open(struct inode *inode, struct file *file)
92*4882a593Smuzhiyun {
93*4882a593Smuzhiyun return single_open(file, bats_show_603, NULL);
94*4882a593Smuzhiyun }
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun static const struct file_operations bats_fops = {
97*4882a593Smuzhiyun .open = bats_open,
98*4882a593Smuzhiyun .read = seq_read,
99*4882a593Smuzhiyun .llseek = seq_lseek,
100*4882a593Smuzhiyun .release = single_release,
101*4882a593Smuzhiyun };
102*4882a593Smuzhiyun
bats_init(void)103*4882a593Smuzhiyun static int __init bats_init(void)
104*4882a593Smuzhiyun {
105*4882a593Smuzhiyun debugfs_create_file("block_address_translation", 0400,
106*4882a593Smuzhiyun powerpc_debugfs_root, NULL, &bats_fops);
107*4882a593Smuzhiyun return 0;
108*4882a593Smuzhiyun }
109*4882a593Smuzhiyun device_initcall(bats_init);
110