Import of Linux/MIPS 2.1.14

1 files changed, 134 insertions, 0 deletions

diff --git a/arch/ppc/kernel/traps.c b/arch/ppc/kernel/traps.c
new file mode 100644
index 000000000..e9f5e8e5b
--- /dev/null
+++ b/arch/ppc/kernel/traps.c
@@ -0,0 +1,134 @@
+/*
+ *  linux/arch/ppc/kernel/traps.c
+ *
+ *  Copyright (C) 1995  Gary Thomas
+ *  Adapted for PowerPC by Gary Thomas
+ */
+
+/*
+ * This file handles the architecture-dependent parts of hardware exceptions
+ */
+
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/stddef.h>
+#include <linux/unistd.h>
+#include <linux/ptrace.h>
+#include <linux/malloc.h>
+#include <linux/ldt.h>
+#include <linux/user.h>
+#include <linux/a.out.h>
+
+#include <asm/pgtable.h>
+#include <asm/segment.h>
+#include <asm/system.h>
+#include <asm/io.h>
+
+#include <asm/ppc_machine.h>
+
+/*
+ * Trap & Exception support
+ */
+
+void
+trap_init(void)
+{
+}
+
+void
+_exception(int signr, struct pt_regs *regs)
+{
+/*	dump_regs(regs);*/
+	force_sig(signr, current);
+	if (!user_mode(regs))
+	{
+		printk("Failure in kernel at PC: %x, MSR: %x\n", regs->nip, regs->msr);
+		while (1) ;
+	}
+}
+
+MachineCheckException(struct pt_regs *regs)
+{
+/*	printk("Machine check at PC: %x[%x], SR: %x\n", regs->nip, va_to_phys(regs->nip), regs->msr);*/
+	_exception(SIGSEGV, regs);	
+}
+
+ProgramCheckException(struct pt_regs *regs)
+{
+/*	printk("Program check at PC: %x[%x], SR: %x\n", regs->nip, va_to_phys(regs->nip), regs->msr);*/
+	if (current->flags & PF_PTRACED)
+	{
+		_exception(SIGTRAP, regs);
+	} else
+	{
+		_exception(SIGILL, regs);
+	}
+}
+
+SingleStepException(struct pt_regs *regs)
+{
+/*	printk("Single step at PC: %x[%x], SR: %x\n", regs->nip, va_to_phys(regs->nip), regs->msr);*/
+	regs->msr &= ~MSR_SE;  /* Turn off 'trace' bit */
+	_exception(SIGTRAP, regs);	
+}
+
+FloatingPointCheckException(struct pt_regs *regs)
+{
+/*	printk("Floating point check at PC: %x[%x], SR: %x\n", regs->nip, va_to_phys(regs->nip), regs->msr);*/
+	_exception(SIGFPE, regs);	
+}
+
+AlignmentException(struct pt_regs *regs)
+{
+/*	printk("Alignment error at PC: %x, SR: %x\n", regs->nip, regs->msr);
+	dump_regs(regs);
+	printk("Alignment error at PC: %x[%x], SR: %x\n", regs->nip, va_to_phys(regs->nip), regs->msr);*/
+	_exception(SIGBUS, regs);	
+}
+
+bad_stack(struct pt_regs *regs)
+{
+/*	printk("Kernel stack overflow at PC: %x[%x], SR: %x\n", regs->nip, va_to_phys(regs->nip), regs->msr);
+	dump_regs(regs);*/
+	while (1) ;
+}
+
+dump_regs(struct pt_regs *regs)
+{
+	int i;
+	printk("NIP: %08X, MSR: %08X, XER: %08X, LR: %08X, FRAME: %08X\n", regs->nip, regs->msr, regs->xer, regs->link, regs);
+#if 0	
+	printk("HASH = %08X/%08X, MISS = %08X/%08X, CMP = %08X/%08X\n", regs->hash1, regs->hash2, regs->imiss, regs->dmiss, regs->icmp, regs->dcmp);
+#endif	
+	printk("TASK = %x[%d] '%s'\n", current, current->pid, current->comm);
+	for (i = 0;  i < 32;  i++)
+	{
+		if ((i % 8) == 0)
+		{
+			printk("GPR%02d: ", i);
+		}
+		printk("%08X ", regs->gpr[i]);
+		if ((i % 8) == 7)
+		{
+			printk("\n");
+		}
+	}
+#if 0	
+	if (regs->nip >= 0x1000)
+		dump_buf(regs->nip-32, 64);
+	dump_buf((regs->nip&0x0FFFFFFF)|KERNELBASE, 32);
+#endif
+}
+
+trace_syscall(struct pt_regs *regs)
+{
+	static int count;
+	printk("Task: %08X(%d), PC: %08X/%08X, Syscall: %3d, Result: %s%d\n", current, current->pid, regs->nip, regs->link, regs->gpr[0], regs->ccr&0x10000000?"Error=":"", regs->gpr[3]);
+	if (++count == 20)
+	{
+		count = 0;
+	}
+}
+