From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001
From: Yunhong Jiang <yunhong.jiang@intel.com>
Date: Tue, 4 Aug 2015 12:17:53 -0700
Subject: Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
---
 kernel/arch/m32r/mm/fault-nommu.c | 133 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 133 insertions(+)
 create mode 100644 kernel/arch/m32r/mm/fault-nommu.c

(limited to 'kernel/arch/m32r/mm/fault-nommu.c')

diff --git a/kernel/arch/m32r/mm/fault-nommu.c b/kernel/arch/m32r/mm/fault-nommu.c
new file mode 100644
index 000000000..80f18cc6f
--- /dev/null
+++ b/kernel/arch/m32r/mm/fault-nommu.c
@@ -0,0 +1,133 @@
+/*
+ *  linux/arch/m32r/mm/fault.c
+ *
+ *  Copyright (c) 2001, 2002  Hitoshi Yamamoto, and H. Kondo
+ *
+ *  Some code taken from i386 version.
+ *    Copyright (C) 1995  Linus Torvalds
+ */
+
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/ptrace.h>
+#include <linux/mman.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/vt_kern.h>              /* For unblank_screen() */
+
+#include <asm/m32r.h>
+#include <asm/uaccess.h>
+#include <asm/pgalloc.h>
+#include <asm/pgtable.h>
+#include <asm/hardirq.h>
+#include <asm/mmu_context.h>
+
+extern void die(const char *, struct pt_regs *, long);
+
+#ifndef CONFIG_SMP
+asmlinkage unsigned int tlb_entry_i_dat;
+asmlinkage unsigned int tlb_entry_d_dat;
+#define tlb_entry_i tlb_entry_i_dat
+#define tlb_entry_d tlb_entry_d_dat
+#else
+unsigned int tlb_entry_i_dat[NR_CPUS];
+unsigned int tlb_entry_d_dat[NR_CPUS];
+#define tlb_entry_i tlb_entry_i_dat[smp_processor_id()]
+#define tlb_entry_d tlb_entry_d_dat[smp_processor_id()]
+#endif
+
+void do_BUG(const char *file, int line)
+{
+	bust_spinlocks(1);
+	printk("kernel BUG at %s:%d!\n", file, line);
+}
+
+/*======================================================================*
+ * do_page_fault()
+ *======================================================================*
+ * This routine handles page faults.  It determines the address,
+ * and the problem, and then passes it off to one of the appropriate
+ * routines.
+ *
+ * ARGUMENT:
+ *  regs       : M32R SP reg.
+ *  error_code : See below
+ *  address    : M32R MMU MDEVA reg. (Operand ACE)
+ *             : M32R BPC reg. (Instruction ACE)
+ *
+ * error_code :
+ *  bit 0 == 0 means no page found, 1 means protection fault
+ *  bit 1 == 0 means read, 1 means write
+ *  bit 2 == 0 means kernel, 1 means user-mode
+ *======================================================================*/
+asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code,
+  unsigned long address)
+{
+
+/*
+ * Oops. The kernel tried to access some bad page. We'll have to
+ * terminate things with extreme prejudice.
+ */
+
+	bust_spinlocks(1);
+
+	if (address < PAGE_SIZE)
+		printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference");
+	else
+		printk(KERN_ALERT "Unable to handle kernel paging request");
+	printk(" at virtual address %08lx\n",address);
+	printk(" printing bpc:\n");
+	printk(KERN_ALERT "bpc = %08lx\n", regs->bpc);
+
+	die("Oops", regs, error_code);
+	bust_spinlocks(0);
+	do_exit(SIGKILL);
+}
+
+/*======================================================================*
+ * update_mmu_cache()
+ *======================================================================*/
+void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr,
+	pte_t *ptep)
+{
+	BUG();
+}
+
+/*======================================================================*
+ * flush_tlb_page() : flushes one page
+ *======================================================================*/
+void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
+{
+	BUG();
+}
+
+/*======================================================================*
+ * flush_tlb_range() : flushes a range of pages
+ *======================================================================*/
+void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
+	unsigned long end)
+{
+	BUG();
+}
+
+/*======================================================================*
+ * flush_tlb_mm() : flushes the specified mm context TLB's
+ *======================================================================*/
+void local_flush_tlb_mm(struct mm_struct *mm)
+{
+	BUG();
+}
+
+/*======================================================================*
+ * flush_tlb_all() : flushes all processes TLBs
+ *======================================================================*/
+void local_flush_tlb_all(void)
+{
+	BUG();
+}
-- 
cgit 1.2.3-korg