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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 | // SPDX-License-Identifier: GPL-2.0+ /* * Copyright 2018, Christophe Leroy CS S.I. * <christophe.leroy@c-s.fr> * * This dumps the content of BATS */ #include <asm/debugfs.h> #include <asm/pgtable.h> #include <asm/cpu_has_feature.h> static char *pp_601(int k, int pp) { if (pp == 0) return k ? "NA" : "RWX"; if (pp == 1) return k ? "ROX" : "RWX"; if (pp == 2) return k ? "RWX" : "RWX"; return k ? "ROX" : "ROX"; } static void bat_show_601(struct seq_file *m, int idx, u32 lower, u32 upper) { u32 blpi = upper & 0xfffe0000; u32 k = (upper >> 2) & 3; u32 pp = upper & 3; phys_addr_t pbn = PHYS_BAT_ADDR(lower); u32 bsm = lower & 0x3ff; u32 size = (bsm + 1) << 17; seq_printf(m, "%d: ", idx); if (!(lower & 0x40)) { seq_puts(m, " -\n"); return; } seq_printf(m, "0x%08x-0x%08x ", blpi, blpi + size - 1); #ifdef CONFIG_PHYS_64BIT seq_printf(m, "0x%016llx ", pbn); #else seq_printf(m, "0x%08x ", pbn); #endif seq_printf(m, "Kernel %s User %s", pp_601(k & 2, pp), pp_601(k & 1, pp)); if (lower & _PAGE_WRITETHRU) seq_puts(m, "write through "); if (lower & _PAGE_NO_CACHE) seq_puts(m, "no cache "); if (lower & _PAGE_COHERENT) seq_puts(m, "coherent "); seq_puts(m, "\n"); } #define BAT_SHOW_601(_m, _n, _l, _u) bat_show_601(_m, _n, mfspr(_l), mfspr(_u)) static int bats_show_601(struct seq_file *m, void *v) { seq_puts(m, "---[ Block Address Translation ]---\n"); BAT_SHOW_601(m, 0, SPRN_IBAT0L, SPRN_IBAT0U); BAT_SHOW_601(m, 1, SPRN_IBAT1L, SPRN_IBAT1U); BAT_SHOW_601(m, 2, SPRN_IBAT2L, SPRN_IBAT2U); BAT_SHOW_601(m, 3, SPRN_IBAT3L, SPRN_IBAT3U); return 0; } static void bat_show_603(struct seq_file *m, int idx, u32 lower, u32 upper, bool is_d) { u32 bepi = upper & 0xfffe0000; u32 bl = (upper >> 2) & 0x7ff; u32 k = upper & 3; phys_addr_t brpn = PHYS_BAT_ADDR(lower); u32 size = (bl + 1) << 17; seq_printf(m, "%d: ", idx); if (k == 0) { seq_puts(m, " -\n"); return; } seq_printf(m, "0x%08x-0x%08x ", bepi, bepi + size - 1); #ifdef CONFIG_PHYS_64BIT seq_printf(m, "0x%016llx ", brpn); #else seq_printf(m, "0x%08x ", brpn); #endif if (k == 1) seq_puts(m, "User "); else if (k == 2) seq_puts(m, "Kernel "); else seq_puts(m, "Kernel/User "); if (lower & BPP_RX) seq_puts(m, is_d ? "RO " : "EXEC "); else if (lower & BPP_RW) seq_puts(m, is_d ? "RW " : "EXEC "); else seq_puts(m, is_d ? "NA " : "NX "); if (lower & _PAGE_WRITETHRU) seq_puts(m, "write through "); if (lower & _PAGE_NO_CACHE) seq_puts(m, "no cache "); if (lower & _PAGE_COHERENT) seq_puts(m, "coherent "); if (lower & _PAGE_GUARDED) seq_puts(m, "guarded "); seq_puts(m, "\n"); } #define BAT_SHOW_603(_m, _n, _l, _u, _d) bat_show_603(_m, _n, mfspr(_l), mfspr(_u), _d) static int bats_show_603(struct seq_file *m, void *v) { seq_puts(m, "---[ Instruction Block Address Translation ]---\n"); BAT_SHOW_603(m, 0, SPRN_IBAT0L, SPRN_IBAT0U, false); BAT_SHOW_603(m, 1, SPRN_IBAT1L, SPRN_IBAT1U, false); BAT_SHOW_603(m, 2, SPRN_IBAT2L, SPRN_IBAT2U, false); BAT_SHOW_603(m, 3, SPRN_IBAT3L, SPRN_IBAT3U, false); if (mmu_has_feature(MMU_FTR_USE_HIGH_BATS)) { BAT_SHOW_603(m, 4, SPRN_IBAT4L, SPRN_IBAT4U, false); BAT_SHOW_603(m, 5, SPRN_IBAT5L, SPRN_IBAT5U, false); BAT_SHOW_603(m, 6, SPRN_IBAT6L, SPRN_IBAT6U, false); BAT_SHOW_603(m, 7, SPRN_IBAT7L, SPRN_IBAT7U, false); } seq_puts(m, "\n---[ Data Block Address Translation ]---\n"); BAT_SHOW_603(m, 0, SPRN_DBAT0L, SPRN_DBAT0U, true); BAT_SHOW_603(m, 1, SPRN_DBAT1L, SPRN_DBAT1U, true); BAT_SHOW_603(m, 2, SPRN_DBAT2L, SPRN_DBAT2U, true); BAT_SHOW_603(m, 3, SPRN_DBAT3L, SPRN_DBAT3U, true); if (mmu_has_feature(MMU_FTR_USE_HIGH_BATS)) { BAT_SHOW_603(m, 4, SPRN_DBAT4L, SPRN_DBAT4U, true); BAT_SHOW_603(m, 5, SPRN_DBAT5L, SPRN_DBAT5U, true); BAT_SHOW_603(m, 6, SPRN_DBAT6L, SPRN_DBAT6U, true); BAT_SHOW_603(m, 7, SPRN_DBAT7L, SPRN_DBAT7U, true); } return 0; } static int bats_open(struct inode *inode, struct file *file) { if (IS_ENABLED(CONFIG_PPC_BOOK3S_601)) return single_open(file, bats_show_601, NULL); return single_open(file, bats_show_603, NULL); } static const struct file_operations bats_fops = { .open = bats_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; static int __init bats_init(void) { struct dentry *debugfs_file; debugfs_file = debugfs_create_file("block_address_translation", 0400, powerpc_debugfs_root, NULL, &bats_fops); return debugfs_file ? 0 : -ENOMEM; } device_initcall(bats_init); |