arch/sparc/kernel/traps_64.c

Source file repositories/reference/linux-study-clean/arch/sparc/kernel/traps_64.c

File Facts

System
Linux kernel
Corpus path
arch/sparc/kernel/traps_64.c
Extension
.c
Size
85697 bytes
Lines
2926
Domain
Architecture Layer
Bucket
arch/sparc
Inferred role
Architecture Layer: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

struct tl1_traplog {
	struct {
		unsigned long tstate;
		unsigned long tpc;
		unsigned long tnpc;
		unsigned long tt;
	} trapstack[4];
	unsigned long tl;
};

static void dump_tl1_traplog(struct tl1_traplog *p)
{
	int i, limit;

	printk(KERN_EMERG "TRAPLOG: Error at trap level 0x%lx, "
	       "dumping track stack.\n", p->tl);

	limit = (tlb_type == hypervisor) ? 2 : 4;
	for (i = 0; i < limit; i++) {
		printk(KERN_EMERG
		       "TRAPLOG: Trap level %d TSTATE[%016lx] TPC[%016lx] "
		       "TNPC[%016lx] TT[%lx]\n",
		       i + 1,
		       p->trapstack[i].tstate, p->trapstack[i].tpc,
		       p->trapstack[i].tnpc, p->trapstack[i].tt);
		printk("TRAPLOG: TPC<%pS>\n", (void *) p->trapstack[i].tpc);
	}
}

void bad_trap(struct pt_regs *regs, long lvl)
{
	char buffer[36];

	if (notify_die(DIE_TRAP, "bad trap", regs,
		       0, lvl, SIGTRAP) == NOTIFY_STOP)
		return;

	if (lvl < 0x100) {
		sprintf(buffer, "Bad hw trap %lx at tl0\n", lvl);
		die_if_kernel(buffer, regs);
	}

	lvl -= 0x100;
	if (regs->tstate & TSTATE_PRIV) {
		sprintf(buffer, "Kernel bad sw trap %lx", lvl);
		die_if_kernel(buffer, regs);
	}
	if (test_thread_flag(TIF_32BIT)) {
		regs->tpc &= 0xffffffff;
		regs->tnpc &= 0xffffffff;
	}
	force_sig_fault_trapno(SIGILL, ILL_ILLTRP,
			       (void __user *)regs->tpc, lvl);
}

void bad_trap_tl1(struct pt_regs *regs, long lvl)
{
	char buffer[36];
	
	if (notify_die(DIE_TRAP_TL1, "bad trap tl1", regs,
		       0, lvl, SIGTRAP) == NOTIFY_STOP)
		return;

	dump_tl1_traplog((struct tl1_traplog *)(regs + 1));

	sprintf (buffer, "Bad trap %lx at tl>0", lvl);
	die_if_kernel (buffer, regs);
}

#ifdef CONFIG_DEBUG_BUGVERBOSE
void do_BUG(const char *file, int line)
{
	bust_spinlocks(1);
	printk("kernel BUG at %s:%d!\n", file, line);
}
EXPORT_SYMBOL(do_BUG);
#endif

static DEFINE_SPINLOCK(dimm_handler_lock);
static dimm_printer_t dimm_handler;

static int sprintf_dimm(int synd_code, unsigned long paddr, char *buf, int buflen)
{
	unsigned long flags;
	int ret = -ENODEV;

	spin_lock_irqsave(&dimm_handler_lock, flags);
	if (dimm_handler) {
		ret = dimm_handler(synd_code, paddr, buf, buflen);
	} else if (tlb_type == spitfire) {

Annotation

Implementation Notes