^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * arch/sh/mm/tlb-debugfs.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * debugfs ops for SH-4 ITLB/UTLBs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2010 Matt Fleming
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * License. See the file "COPYING" in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/debugfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/processor.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/mmu_context.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/tlbflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) enum tlb_type {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) TLB_TYPE_ITLB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) TLB_TYPE_UTLB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) int bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) const char *size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) } tlb_sizes[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) { 0x0, " 1KB" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) { 0x1, " 4KB" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) { 0x2, " 8KB" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) { 0x4, " 64KB" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) { 0x5, "256KB" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) { 0x7, " 1MB" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) { 0x8, " 4MB" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) { 0xc, " 64MB" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static int tlb_seq_show(struct seq_file *file, void *iter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) unsigned int tlb_type = (unsigned int)file->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) unsigned long addr1, addr2, data1, data2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) unsigned long mmucr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) unsigned int nentries, entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) unsigned int urb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) mmucr = __raw_readl(MMUCR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) if ((mmucr & 0x1) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) seq_printf(file, "address translation disabled\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) if (tlb_type == TLB_TYPE_ITLB) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) addr1 = MMU_ITLB_ADDRESS_ARRAY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) addr2 = MMU_ITLB_ADDRESS_ARRAY2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) data1 = MMU_ITLB_DATA_ARRAY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) data2 = MMU_ITLB_DATA_ARRAY2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) nentries = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) addr1 = MMU_UTLB_ADDRESS_ARRAY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) addr2 = MMU_UTLB_ADDRESS_ARRAY2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) data1 = MMU_UTLB_DATA_ARRAY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) data2 = MMU_UTLB_DATA_ARRAY2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) nentries = 64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) local_irq_save(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) jump_to_uncached();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) urb = (mmucr & MMUCR_URB) >> MMUCR_URB_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) /* Make the "entry >= urb" test fail. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (urb == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) urb = MMUCR_URB_NENTRIES + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (tlb_type == TLB_TYPE_ITLB) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) addr1 = MMU_ITLB_ADDRESS_ARRAY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) addr2 = MMU_ITLB_ADDRESS_ARRAY2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) data1 = MMU_ITLB_DATA_ARRAY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) data2 = MMU_ITLB_DATA_ARRAY2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) nentries = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) addr1 = MMU_UTLB_ADDRESS_ARRAY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) addr2 = MMU_UTLB_ADDRESS_ARRAY2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) data1 = MMU_UTLB_DATA_ARRAY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) data2 = MMU_UTLB_DATA_ARRAY2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) nentries = 64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) seq_printf(file, "entry: vpn ppn asid size valid wired\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) for (entry = 0; entry < nentries; entry++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) unsigned long vpn, ppn, asid, size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) unsigned long valid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) unsigned long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) const char *sz = " ?";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) val = __raw_readl(addr1 | (entry << MMU_TLB_ENTRY_SHIFT));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) ctrl_barrier();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) vpn = val & 0xfffffc00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) valid = val & 0x100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) val = __raw_readl(addr2 | (entry << MMU_TLB_ENTRY_SHIFT));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) ctrl_barrier();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) asid = val & MMU_CONTEXT_ASID_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) val = __raw_readl(data1 | (entry << MMU_TLB_ENTRY_SHIFT));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) ctrl_barrier();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) ppn = (val & 0x0ffffc00) << 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) val = __raw_readl(data2 | (entry << MMU_TLB_ENTRY_SHIFT));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) ctrl_barrier();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) size = (val & 0xf0) >> 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) for (i = 0; i < ARRAY_SIZE(tlb_sizes); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (tlb_sizes[i].bits == size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (i != ARRAY_SIZE(tlb_sizes))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) sz = tlb_sizes[i].size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) seq_printf(file, "%2d: 0x%08lx 0x%08lx %5lu %s %s %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) entry, vpn, ppn, asid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) sz, valid ? "V" : "-",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) (urb <= entry) ? "W" : "-");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) back_to_cached();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) local_irq_restore(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) static int tlb_debugfs_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return single_open(file, tlb_seq_show, inode->i_private);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) static const struct file_operations tlb_debugfs_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) .open = tlb_debugfs_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) .read = seq_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) .llseek = seq_lseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) .release = single_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) static int __init tlb_debugfs_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) debugfs_create_file("itlb", S_IRUSR, arch_debugfs_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) (void *)TLB_TYPE_ITLB, &tlb_debugfs_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) debugfs_create_file("utlb", S_IRUSR, arch_debugfs_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) (void *)TLB_TYPE_UTLB, &tlb_debugfs_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) module_init(tlb_debugfs_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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