Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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: Guo Ren <guoren@linux.alibaba.com>
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arch/csky/kernel/ptrace.c
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arch/csky/kernel/ptrace.c
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#include <asm/asm-offsets.h>
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#include <abi/regdef.h>
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#include <abi/ckmmu.h>
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#define CREATE_TRACE_POINTS
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#include <trace/events/syscalls.h>
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trace_sys_exit(regs, syscall_get_return_value(current, regs));
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}
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#ifdef CONFIG_CPU_CK860
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static void show_iutlb(void)
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{
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int entry, i;
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unsigned long flags;
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unsigned long oldpid;
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unsigned long entryhi[16], entrylo0[16], entrylo1[16];
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oldpid = read_mmu_entryhi();
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entry = 0x8000;
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local_irq_save(flags);
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for (i = 0; i < 16; i++) {
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write_mmu_index(entry);
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tlb_read();
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entryhi[i] = read_mmu_entryhi();
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entrylo0[i] = read_mmu_entrylo0();
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entrylo1[i] = read_mmu_entrylo1();
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entry++;
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}
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local_irq_restore(flags);
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write_mmu_entryhi(oldpid);
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printk("\n\n\n");
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for (i = 0; i < 16; i++)
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printk("iutlb[%d]: entryhi - 0x%lx; entrylo0 - 0x%lx;"
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" entrylo1 - 0x%lx\n",
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i, entryhi[i], entrylo0[i], entrylo1[i]);
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printk("\n\n\n");
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}
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static void show_dutlb(void)
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{
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int entry, i;
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unsigned long flags;
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unsigned long oldpid;
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unsigned long entryhi[16], entrylo0[16], entrylo1[16];
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oldpid = read_mmu_entryhi();
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entry = 0x4000;
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local_irq_save(flags);
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for (i = 0; i < 16; i++) {
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write_mmu_index(entry);
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tlb_read();
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entryhi[i] = read_mmu_entryhi();
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entrylo0[i] = read_mmu_entrylo0();
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entrylo1[i] = read_mmu_entrylo1();
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entry++;
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}
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local_irq_restore(flags);
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write_mmu_entryhi(oldpid);
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printk("\n\n\n");
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for (i = 0; i < 16; i++)
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printk("dutlb[%d]: entryhi - 0x%lx; entrylo0 - 0x%lx;"
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" entrylo1 - 0x%lx\n",
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i, entryhi[i], entrylo0[i], entrylo1[i]);
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printk("\n\n\n");
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}
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static unsigned long entryhi[1024], entrylo0[1024], entrylo1[1024];
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static void show_jtlb(void)
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{
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int entry;
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unsigned long flags;
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unsigned long oldpid;
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oldpid = read_mmu_entryhi();
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entry = 0;
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local_irq_save(flags);
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while (entry < 1024) {
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write_mmu_index(entry);
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tlb_read();
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entryhi[entry] = read_mmu_entryhi();
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entrylo0[entry] = read_mmu_entrylo0();
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entrylo1[entry] = read_mmu_entrylo1();
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entry++;
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}
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local_irq_restore(flags);
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write_mmu_entryhi(oldpid);
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printk("\n\n\n");
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for (entry = 0; entry < 1024; entry++)
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printk("jtlb[%x]: entryhi - 0x%lx; entrylo0 - 0x%lx;"
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" entrylo1 - 0x%lx\n",
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entry, entryhi[entry], entrylo0[entry], entrylo1[entry]);
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printk("\n\n\n");
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}
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static void show_tlb(void)
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{
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show_iutlb();
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show_dutlb();
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show_jtlb();
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}
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#else
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static void show_tlb(void)
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{
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return;
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}
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#endif
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void show_regs(struct pt_regs *fp)
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{
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pr_info("\nCURRENT PROCESS:\n\n");
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pr_info("r14: 0x%08lx r1: 0x%08lx\n",
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fp->regs[8], fp->regs[9]);
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#endif
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show_tlb();
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return;
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}