Orange Pi5 kernel

// 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 <asm/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_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)
{
<------>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)
{
<------>debugfs_create_file("block_address_translation", 0400,
<------><------><------>    powerpc_debugfs_root, NULL, &bats_fops);
<------>return 0;
}
device_initcall(bats_init);