Commit 1152cb5a authored by Guo Ren's avatar Guo Ren
Browse files

csky: Add show_tlb for CPU_CK860 debug 



Print all 1024 jtlb entries and 16 iutlb entries and 16 dutlb
entries in show_regs.

Signed-off-by: default avatarGuo Ren <guoren@linux.alibaba.com>
parent 3b756ccd

arch/csky/kernel/ptrace.c

+121 −0
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ 
#include <asm/asm-offsets.h>



#include <abi/regdef.h>

#include <abi/ckmmu.h>



#define CREATE_TRACE_POINTS

#include <trace/events/syscalls.h>
@@ -343,6 +344,124 @@ asmlinkage void syscall_trace_exit(struct pt_regs *regs) 
		trace_sys_exit(regs, syscall_get_return_value(current, regs));

}



#ifdef CONFIG_CPU_CK860

static void show_iutlb(void)

{

	int entry, i;

	unsigned long flags;

	unsigned long oldpid;

	unsigned long entryhi[16], entrylo0[16], entrylo1[16];



	oldpid = read_mmu_entryhi();



	entry = 0x8000;



	local_irq_save(flags);



	for (i = 0; i < 16; i++) {

		write_mmu_index(entry);

		tlb_read();

		entryhi[i]  = read_mmu_entryhi();

		entrylo0[i] = read_mmu_entrylo0();

		entrylo1[i] = read_mmu_entrylo1();



		entry++;

	}



	local_irq_restore(flags);



	write_mmu_entryhi(oldpid);



	printk("\n\n\n");

	for (i = 0; i < 16; i++)

		printk("iutlb[%d]:	entryhi - 0x%lx;	entrylo0 - 0x%lx;"

		       "	entrylo1 - 0x%lx\n",

			 i, entryhi[i], entrylo0[i], entrylo1[i]);

	printk("\n\n\n");

}



static void show_dutlb(void)

{

	int entry, i;

	unsigned long flags;

	unsigned long oldpid;

	unsigned long entryhi[16], entrylo0[16], entrylo1[16];



	oldpid = read_mmu_entryhi();



	entry = 0x4000;



	local_irq_save(flags);



	for (i = 0; i < 16; i++) {

		write_mmu_index(entry);

		tlb_read();

		entryhi[i]  = read_mmu_entryhi();

		entrylo0[i] = read_mmu_entrylo0();

		entrylo1[i] = read_mmu_entrylo1();



		entry++;

	}



	local_irq_restore(flags);



	write_mmu_entryhi(oldpid);



	printk("\n\n\n");

	for (i = 0; i < 16; i++)

		printk("dutlb[%d]:	entryhi - 0x%lx;	entrylo0 - 0x%lx;"

		       "	entrylo1 - 0x%lx\n",

			 i, entryhi[i], entrylo0[i], entrylo1[i]);

	printk("\n\n\n");

}



static unsigned long entryhi[1024], entrylo0[1024], entrylo1[1024];

static void show_jtlb(void)

{

	int entry;

	unsigned long flags;

	unsigned long oldpid;



	oldpid = read_mmu_entryhi();



	entry = 0;



	local_irq_save(flags);

	while (entry < 1024) {

		write_mmu_index(entry);

		tlb_read();

		entryhi[entry]  = read_mmu_entryhi();

		entrylo0[entry] = read_mmu_entrylo0();

		entrylo1[entry] = read_mmu_entrylo1();



		entry++;

	}

	local_irq_restore(flags);



	write_mmu_entryhi(oldpid);



	printk("\n\n\n");



	for (entry = 0; entry < 1024; entry++)

		printk("jtlb[%x]:	entryhi - 0x%lx;	entrylo0 - 0x%lx;"

		       "	entrylo1 - 0x%lx\n",

			 entry, entryhi[entry], entrylo0[entry], entrylo1[entry]);

	printk("\n\n\n");

}



static void show_tlb(void)

{

	show_iutlb();

	show_dutlb();

	show_jtlb();

}

#else

static void show_tlb(void)

{

	return;

}

#endif



void show_regs(struct pt_regs *fp)

{

	pr_info("\nCURRENT PROCESS:\n\n");
@@ -396,5 +515,7 @@ void show_regs(struct pt_regs *fp) 
		fp->regs[8], fp->regs[9]);

#endif



	show_tlb();



	return;

}