// 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%0x\n" , read_csr_tlbidx());
pr_info("PageSize : 0x%0x\n" , read_csr_pagesize());
pr_info("EntryHi : 0x%0*lx\n" , field, read_csr_entryhi());
pr_info("EntryLo0 : 0x%0*lx\n" , field, read_csr_entrylo0());
pr_info("EntryLo1 : 0x%0*lx\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 = 16 ;
int vwidth = 16 ;
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: %4d pgsize=0x%x " , i, (1 << pagesize));
c0 = (entrylo0 & ENTRYLO_C) >> ENTRYLO_C_SHIFT;
c1 = (entrylo1 & ENTRYLO_C) >> ENTRYLO_C_SHIFT;
pr_cont("va=0x%0*lx asid=0x%0*lx" ,
vwidth, (entryhi & ~0 x1fffUL), 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("nr=%d nx=%d " ,
(entrylo0 & ENTRYLO_NR) ? 1 : 0 ,
(entrylo0 & ENTRYLO_NX) ? 1 : 0 );
pr_cont("pa=0x%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("nr=%d nx=%d " ,
(entrylo1 & ENTRYLO_NR) ? 1 : 0 ,
(entrylo1 & ENTRYLO_NX) ? 1 : 0 );
pr_cont("pa=0x%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 );
}
Messung V0.5 in Prozent C=95 H=94 G=94
¤ Dauer der Verarbeitung: 0.10 Sekunden
(vorverarbeitet am 2026-09-28)
¤
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