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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
*
* Derived from MIPS:
* Copyright (C) 1994, 1995 by Waldorf Electronics, written by Ralf Baechle.
* Copyright (C) 1999 by Silicon Graphics, Inc.
*/
#include <linux/kernel.h>
#include <linux/mm.h>
#include <asm/loongarch.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/tlb.h>
void dump_tlb_regs(void)
{
const int field = 2 * sizeof(unsigned long);
pr_info("Index : %0x\n", read_csr_tlbidx());
pr_info("PageSize : %0x\n", read_csr_pagesize());
pr_info("EntryHi : %0*llx\n", field, read_csr_entryhi());
pr_info("EntryLo0 : %0*llx\n", field, read_csr_entrylo0());
pr_info("EntryLo1 : %0*llx\n", field, read_csr_entrylo1());
}
static void dump_tlb(int first, int last)
{
unsigned long s_entryhi, entryhi, asid;
unsigned long long entrylo0, entrylo1, pa;
unsigned int index;
unsigned int s_index, s_asid;
unsigned int pagesize, c0, c1, i;
unsigned long asidmask = cpu_asid_mask(¤t_cpu_data);
int pwidth = 11;
int vwidth = 11;
int asidwidth = DIV_ROUND_UP(ilog2(asidmask) + 1, 4);
s_entryhi = read_csr_entryhi();
s_index = read_csr_tlbidx();
s_asid = read_csr_asid();
for (i = first; i <= last; i++) {
write_csr_index(i);
tlb_read();
pagesize = read_csr_pagesize();
entryhi = read_csr_entryhi();
entrylo0 = read_csr_entrylo0();
entrylo1 = read_csr_entrylo1();
index = read_csr_tlbidx();
asid = read_csr_asid();
/* EHINV bit marks entire entry as invalid */
if (index & CSR_TLBIDX_EHINV)
continue;
/*
* ASID takes effect in absence of G (global) bit.
*/
if (!((entrylo0 | entrylo1) & ENTRYLO_G) &&
asid != s_asid)
continue;
/*
* Only print entries in use
*/
pr_info("Index: %2d pgsize=%x ", i, (1 << pagesize));
c0 = (entrylo0 & ENTRYLO_C) >> ENTRYLO_C_SHIFT;
c1 = (entrylo1 & ENTRYLO_C) >> ENTRYLO_C_SHIFT;
pr_cont("va=%0*lx asid=%0*lx",
vwidth, (entryhi & ~0x1fffUL), asidwidth, asid & asidmask);
/* NR/NX are in awkward places, so mask them off separately */
pa = entrylo0 & ~(ENTRYLO_NR | ENTRYLO_NX);
pa = pa & PAGE_MASK;
pr_cont("\n\t[");
pr_cont("ri=%d xi=%d ",
(entrylo0 & ENTRYLO_NR) ? 1 : 0,
(entrylo0 & ENTRYLO_NX) ? 1 : 0);
pr_cont("pa=%0*llx c=%d d=%d v=%d g=%d plv=%lld] [",
pwidth, pa, c0,
(entrylo0 & ENTRYLO_D) ? 1 : 0,
(entrylo0 & ENTRYLO_V) ? 1 : 0,
(entrylo0 & ENTRYLO_G) ? 1 : 0,
(entrylo0 & ENTRYLO_PLV) >> ENTRYLO_PLV_SHIFT);
/* NR/NX are in awkward places, so mask them off separately */
pa = entrylo1 & ~(ENTRYLO_NR | ENTRYLO_NX);
pa = pa & PAGE_MASK;
pr_cont("ri=%d xi=%d ",
(entrylo1 & ENTRYLO_NR) ? 1 : 0,
(entrylo1 & ENTRYLO_NX) ? 1 : 0);
pr_cont("pa=%0*llx c=%d d=%d v=%d g=%d plv=%lld]\n",
pwidth, pa, c1,
(entrylo1 & ENTRYLO_D) ? 1 : 0,
(entrylo1 & ENTRYLO_V) ? 1 : 0,
(entrylo1 & ENTRYLO_G) ? 1 : 0,
(entrylo1 & ENTRYLO_PLV) >> ENTRYLO_PLV_SHIFT);
}
pr_info("\n");
write_csr_entryhi(s_entryhi);
write_csr_tlbidx(s_index);
write_csr_asid(s_asid);
}
void dump_tlb_all(void)
{
dump_tlb(0, current_cpu_data.tlbsize - 1);
}
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