100 lines
2.7 KiB
C
100 lines
2.7 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2018, Christophe Leroy CS S.I.
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* <christophe.leroy@c-s.fr>
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*
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* This dumps the content of BATS
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*/
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#include <linux/pgtable.h>
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#include <linux/debugfs.h>
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#include <asm/cpu_has_feature.h>
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#include "ptdump.h"
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static void bat_show_603(struct seq_file *m, int idx, u32 lower, u32 upper, bool is_d)
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{
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u32 bepi = upper & 0xfffe0000;
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u32 bl = (upper >> 2) & 0x7ff;
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u32 k = upper & 3;
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phys_addr_t brpn = PHYS_BAT_ADDR(lower);
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u32 size = (bl + 1) << 17;
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seq_printf(m, "%d: ", idx);
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if (k == 0) {
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seq_puts(m, " -\n");
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return;
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}
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seq_printf(m, "0x%08x-0x%08x ", bepi, bepi + size - 1);
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#ifdef CONFIG_PHYS_64BIT
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seq_printf(m, "0x%016llx ", brpn);
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#else
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seq_printf(m, "0x%08x ", brpn);
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#endif
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pt_dump_size(m, size);
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if (k == 1)
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seq_puts(m, "User ");
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else if (k == 2)
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seq_puts(m, "Kernel ");
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else
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seq_puts(m, "Kernel/User ");
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if (lower & BPP_RX)
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seq_puts(m, is_d ? "r " : " x ");
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else if (lower & BPP_RW)
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seq_puts(m, is_d ? "rw " : " x ");
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else
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seq_puts(m, is_d ? " " : " ");
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seq_puts(m, lower & _PAGE_WRITETHRU ? "w " : " ");
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seq_puts(m, lower & _PAGE_NO_CACHE ? "i " : " ");
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seq_puts(m, lower & _PAGE_COHERENT ? "m " : " ");
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seq_puts(m, lower & _PAGE_GUARDED ? "g " : " ");
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seq_puts(m, "\n");
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}
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#define BAT_SHOW_603(_m, _n, _l, _u, _d) bat_show_603(_m, _n, mfspr(_l), mfspr(_u), _d)
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static int bats_show(struct seq_file *m, void *v)
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{
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seq_puts(m, "---[ Instruction Block Address Translation ]---\n");
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BAT_SHOW_603(m, 0, SPRN_IBAT0L, SPRN_IBAT0U, false);
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BAT_SHOW_603(m, 1, SPRN_IBAT1L, SPRN_IBAT1U, false);
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BAT_SHOW_603(m, 2, SPRN_IBAT2L, SPRN_IBAT2U, false);
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BAT_SHOW_603(m, 3, SPRN_IBAT3L, SPRN_IBAT3U, false);
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if (mmu_has_feature(MMU_FTR_USE_HIGH_BATS)) {
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BAT_SHOW_603(m, 4, SPRN_IBAT4L, SPRN_IBAT4U, false);
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BAT_SHOW_603(m, 5, SPRN_IBAT5L, SPRN_IBAT5U, false);
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BAT_SHOW_603(m, 6, SPRN_IBAT6L, SPRN_IBAT6U, false);
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BAT_SHOW_603(m, 7, SPRN_IBAT7L, SPRN_IBAT7U, false);
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}
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seq_puts(m, "\n---[ Data Block Address Translation ]---\n");
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BAT_SHOW_603(m, 0, SPRN_DBAT0L, SPRN_DBAT0U, true);
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BAT_SHOW_603(m, 1, SPRN_DBAT1L, SPRN_DBAT1U, true);
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BAT_SHOW_603(m, 2, SPRN_DBAT2L, SPRN_DBAT2U, true);
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BAT_SHOW_603(m, 3, SPRN_DBAT3L, SPRN_DBAT3U, true);
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if (mmu_has_feature(MMU_FTR_USE_HIGH_BATS)) {
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BAT_SHOW_603(m, 4, SPRN_DBAT4L, SPRN_DBAT4U, true);
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BAT_SHOW_603(m, 5, SPRN_DBAT5L, SPRN_DBAT5U, true);
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BAT_SHOW_603(m, 6, SPRN_DBAT6L, SPRN_DBAT6U, true);
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BAT_SHOW_603(m, 7, SPRN_DBAT7L, SPRN_DBAT7U, true);
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}
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(bats);
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static int __init bats_init(void)
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{
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debugfs_create_file("block_address_translation", 0400,
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arch_debugfs_dir, NULL, &bats_fops);
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return 0;
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}
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device_initcall(bats_init);
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