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Code Issues Releases Activity

Make the ddb command "show tlb" SMP friendly.

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It now accepts an argument to dump out the tlb of a particular cpu.
This commit is contained in:
Neel Natu 2010-03-12 03:49:17 +00:00
parent 55c4e01602
commit 2200b28e5f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=205064
4 changed files with 69 additions and 11 deletions
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2
sys/mips/include/cpuregs.h
View File

@ -577,6 +577,8 @@
#define MIPS_CONFIG1_TLBSZ_MASK 0x7E000000 /* bits 30..25 # tlb entries minus one */
#define MIPS_CONFIG1_TLBSZ_SHIFT 25
#define MIPS_MAX_TLB_ENTRIES 64
#define MIPS_CONFIG1_IS_MASK 0x01C00000 /* bits 24..22 icache sets per way */
#define MIPS_CONFIG1_IS_SHIFT 22
#define MIPS_CONFIG1_IL_MASK 0x00380000 /* bits 21..19 icache line size */

5
sys/mips/include/pmap.h
View File

@ -219,6 +219,11 @@ pmap_map_fpage(vm_paddr_t pa, struct fpage *fp,
boolean_t check_unmaped);
void pmap_unmap_fpage(vm_paddr_t pa, struct fpage *fp);
/*
* Function to save TLB contents so that they may be inspected in the debugger.
*/
extern void pmap_save_tlb(void);
#endif /* _KERNEL */
#endif /* !LOCORE */

1
sys/mips/mips/mp_machdep.c
View File

@ -128,6 +128,7 @@ mips_ipi_handler(void *arg)
CTR0(KTR_SMP, "IPI_STOP or IPI_STOP_HARD");
savectx(&stoppcbs[cpu]);
pmap_save_tlb();
/* Indicate we are stopped */
atomic_set_int(&stopped_cpus, cpumask);

72
sys/mips/mips/pmap.c
View File

@ -76,6 +76,7 @@ __FBSDID("$FreeBSD$");
#include <sys/msgbuf.h>
#include <sys/vmmeter.h>
#include <sys/mman.h>
#include <sys/smp.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
@ -149,6 +150,8 @@ unsigned pmap_max_asid; /* max ASID supported by the system */
vm_offset_t kernel_vm_end;
static struct tlb tlbstash[MAXCPU][MIPS_MAX_TLB_ENTRIES];
static void pmap_asid_alloc(pmap_t pmap);
/*
@ -3284,17 +3287,6 @@ db_dump_tlb(int first, int last)
}
}
#ifdef DDB
#include <sys/kernel.h>
#include <ddb/ddb.h>
DB_SHOW_COMMAND(tlb, ddb_dump_tlb)
{
db_dump_tlb(0, num_tlbentries - 1);
}
#endif
/*
* Routine: pmap_kextract
* Function:
@ -3377,3 +3369,61 @@ pmap_flush_pvcache(vm_page_t m)
}
}
}
void
pmap_save_tlb(void)
{
int tlbno, cpu;
cpu = PCPU_GET(cpuid);
for (tlbno = 0; tlbno < num_tlbentries; ++tlbno)
MachTLBRead(tlbno, &tlbstash[cpu][tlbno]);
}
#ifdef DDB
#include <ddb/ddb.h>
DB_SHOW_COMMAND(tlb, ddb_dump_tlb)
{
int cpu, tlbno;
struct tlb *tlb;
if (have_addr)
cpu = ((addr >> 4) % 16) * 10 + (addr % 16);
else
cpu = PCPU_GET(cpuid);
if (cpu < 0 || cpu >= mp_ncpus) {
db_printf("Invalid CPU %d\n", cpu);
return;
} else
db_printf("CPU %d:\n", cpu);
if (cpu == PCPU_GET(cpuid))
pmap_save_tlb();
for (tlbno = 0; tlbno < num_tlbentries; ++tlbno) {
tlb = &tlbstash[cpu][tlbno];
if (tlb->tlb_lo0 & PTE_V || tlb->tlb_lo1 & PTE_V) {
printf("TLB %2d vad 0x%0lx ",
tlbno, (long)(tlb->tlb_hi & 0xffffff00));
} else {
printf("TLB*%2d vad 0x%0lx ",
tlbno, (long)(tlb->tlb_hi & 0xffffff00));
}
printf("0=0x%0lx ", pfn_to_vad((long)tlb->tlb_lo0));
printf("%c", tlb->tlb_lo0 & PTE_V ? 'V' : '-');
printf("%c", tlb->tlb_lo0 & PTE_M ? 'M' : '-');
printf("%c", tlb->tlb_lo0 & PTE_G ? 'G' : '-');
printf(" atr %x ", (tlb->tlb_lo0 >> 3) & 7);
printf("1=0x%0lx ", pfn_to_vad((long)tlb->tlb_lo1));
printf("%c", tlb->tlb_lo1 & PTE_V ? 'V' : '-');
printf("%c", tlb->tlb_lo1 & PTE_M ? 'M' : '-');
printf("%c", tlb->tlb_lo1 & PTE_G ? 'G' : '-');
printf(" atr %x ", (tlb->tlb_lo1 >> 3) & 7);
printf(" sz=%x pid=%x\n", tlb->tlb_mask,
(tlb->tlb_hi & 0x000000ff));
}
}
#endif /* DDB */