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// 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 <linux/pgtable.h>
#include <linux/debugfs.h>
#include <asm/cpu_has_feature.h>
#include "ptdump.h"
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
pt_dump_size(m, size);
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 ? "r " : " x ");
else if (lower & BPP_RW)
seq_puts(m, is_d ? "rw " : " x ");
else
seq_puts(m, is_d ? " " : " ");
seq_puts(m, lower & _PAGE_WRITETHRU ? "w " : " ");
seq_puts(m, lower & _PAGE_NO_CACHE ? "i " : " ");
seq_puts(m, lower & _PAGE_COHERENT ? "m " : " ");
seq_puts(m, lower & _PAGE_GUARDED ? "g " : " ");
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(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;
}
DEFINE_SHOW_ATTRIBUTE(bats);
static int __init bats_init(void)
{
debugfs_create_file("block_address_translation", 0400,
arch_debugfs_dir, NULL, &bats_fops);
return 0;
}
device_initcall(bats_init);
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