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>

3 files changed, 587 insertions, 0 deletions

diff --git a/kernel/arch/m68k/mvme16x/Makefile b/kernel/arch/m68k/mvme16x/Makefile
new file mode 100644
index 000000000..edb3f6e6e
--- /dev/null
+++ b/kernel/arch/m68k/mvme16x/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for Linux arch/m68k/mvme16x source directory
+#
+
+obj-y		:= config.o rtc.o
diff --git a/kernel/arch/m68k/mvme16x/config.c b/kernel/arch/m68k/mvme16x/config.c
new file mode 100644
index 000000000..a53803cc6
--- /dev/null
+++ b/kernel/arch/m68k/mvme16x/config.c
@@ -0,0 +1,418 @@
+/*
+ *  arch/m68k/mvme16x/config.c
+ *
+ *  Copyright (C) 1995 Richard Hirst [richard@sleepie.demon.co.uk]
+ *
+ * Based on:
+ *
+ *  linux/amiga/config.c
+ *
+ *  Copyright (C) 1993 Hamish Macdonald
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file README.legal in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/seq_file.h>
+#include <linux/tty.h>
+#include <linux/console.h>
+#include <linux/linkage.h>
+#include <linux/init.h>
+#include <linux/major.h>
+#include <linux/genhd.h>
+#include <linux/rtc.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+
+#include <asm/bootinfo.h>
+#include <asm/bootinfo-vme.h>
+#include <asm/byteorder.h>
+#include <asm/pgtable.h>
+#include <asm/setup.h>
+#include <asm/irq.h>
+#include <asm/traps.h>
+#include <asm/rtc.h>
+#include <asm/machdep.h>
+#include <asm/mvme16xhw.h>
+
+extern t_bdid mvme_bdid;
+
+static MK48T08ptr_t volatile rtc = (MK48T08ptr_t)MVME_RTC_BASE;
+
+static void mvme16x_get_model(char *model);
+extern void mvme16x_sched_init(irq_handler_t handler);
+extern u32 mvme16x_gettimeoffset(void);
+extern int mvme16x_hwclk (int, struct rtc_time *);
+extern int mvme16x_set_clock_mmss (unsigned long);
+extern void mvme16x_reset (void);
+
+int bcd2int (unsigned char b);
+
+/* Save tick handler routine pointer, will point to xtime_update() in
+ * kernel/time/timekeeping.c, called via mvme16x_process_int() */
+
+static irq_handler_t tick_handler;
+
+
+unsigned short mvme16x_config;
+EXPORT_SYMBOL(mvme16x_config);
+
+
+int __init mvme16x_parse_bootinfo(const struct bi_record *bi)
+{
+	uint16_t tag = be16_to_cpu(bi->tag);
+	if (tag == BI_VME_TYPE || tag == BI_VME_BRDINFO)
+		return 0;
+	else
+		return 1;
+}
+
+void mvme16x_reset(void)
+{
+	printk ("\r\n\nCalled mvme16x_reset\r\n"
+			"\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r");
+	/* The string of returns is to delay the reset until the whole
+	 * message is output.  Assert reset bit in GCSR */
+	*(volatile char *)0xfff40107 = 0x80;
+}
+
+static void mvme16x_get_model(char *model)
+{
+    p_bdid p = &mvme_bdid;
+    char suf[4];
+
+    suf[1] = p->brdsuffix[0];
+    suf[2] = p->brdsuffix[1];
+    suf[3] = '\0';
+    suf[0] = suf[1] ? '-' : '\0';
+
+    sprintf(model, "Motorola MVME%x%s", be16_to_cpu(p->brdno), suf);
+}
+
+
+static void mvme16x_get_hardware_list(struct seq_file *m)
+{
+    uint16_t brdno = be16_to_cpu(mvme_bdid.brdno);
+
+    if (brdno == 0x0162 || brdno == 0x0172)
+    {
+	unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
+
+	seq_printf (m, "VMEchip2        %spresent\n",
+			rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
+	seq_printf (m, "SCSI interface  %spresent\n",
+			rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
+	seq_printf (m, "Ethernet i/f    %spresent\n",
+			rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
+    }
+}
+
+/*
+ * This function is called during kernel startup to initialize
+ * the mvme16x IRQ handling routines.  Should probably ensure
+ * that the base vectors for the VMEChip2 and PCCChip2 are valid.
+ */
+
+static void __init mvme16x_init_IRQ (void)
+{
+	m68k_setup_user_interrupt(VEC_USER, 192);
+}
+
+#define pcc2chip	((volatile u_char *)0xfff42000)
+#define PccSCCMICR	0x1d
+#define PccSCCTICR	0x1e
+#define PccSCCRICR	0x1f
+#define PccTPIACKR	0x25
+
+#ifdef CONFIG_EARLY_PRINTK
+
+/**** cd2401 registers ****/
+#define CD2401_ADDR	(0xfff45000)
+
+#define CyGFRCR         (0x81)
+#define CyCCR		(0x13)
+#define      CyCLR_CHAN		(0x40)
+#define      CyINIT_CHAN	(0x20)
+#define      CyCHIP_RESET	(0x10)
+#define      CyENB_XMTR		(0x08)
+#define      CyDIS_XMTR		(0x04)
+#define      CyENB_RCVR		(0x02)
+#define      CyDIS_RCVR		(0x01)
+#define CyCAR		(0xee)
+#define CyIER		(0x11)
+#define      CyMdmCh		(0x80)
+#define      CyRxExc		(0x20)
+#define      CyRxData		(0x08)
+#define      CyTxMpty		(0x02)
+#define      CyTxRdy		(0x01)
+#define CyLICR		(0x26)
+#define CyRISR		(0x89)
+#define      CyTIMEOUT		(0x80)
+#define      CySPECHAR		(0x70)
+#define      CyOVERRUN		(0x08)
+#define      CyPARITY		(0x04)
+#define      CyFRAME		(0x02)
+#define      CyBREAK		(0x01)
+#define CyREOIR		(0x84)
+#define CyTEOIR		(0x85)
+#define CyMEOIR		(0x86)
+#define      CyNOTRANS		(0x08)
+#define CyRFOC		(0x30)
+#define CyRDR		(0xf8)
+#define CyTDR		(0xf8)
+#define CyMISR		(0x8b)
+#define CyRISR		(0x89)
+#define CyTISR		(0x8a)
+#define CyMSVR1		(0xde)
+#define CyMSVR2		(0xdf)
+#define      CyDSR		(0x80)
+#define      CyDCD		(0x40)
+#define      CyCTS		(0x20)
+#define      CyDTR		(0x02)
+#define      CyRTS		(0x01)
+#define CyRTPRL		(0x25)
+#define CyRTPRH		(0x24)
+#define CyCOR1		(0x10)
+#define      CyPARITY_NONE	(0x00)
+#define      CyPARITY_E		(0x40)
+#define      CyPARITY_O		(0xC0)
+#define      Cy_5_BITS		(0x04)
+#define      Cy_6_BITS		(0x05)
+#define      Cy_7_BITS		(0x06)
+#define      Cy_8_BITS		(0x07)
+#define CyCOR2		(0x17)
+#define      CyETC		(0x20)
+#define      CyCtsAE		(0x02)
+#define CyCOR3		(0x16)
+#define      Cy_1_STOP		(0x02)
+#define      Cy_2_STOP		(0x04)
+#define CyCOR4		(0x15)
+#define      CyREC_FIFO		(0x0F)  /* Receive FIFO threshold */
+#define CyCOR5		(0x14)
+#define CyCOR6		(0x18)
+#define CyCOR7		(0x07)
+#define CyRBPR		(0xcb)
+#define CyRCOR		(0xc8)
+#define CyTBPR		(0xc3)
+#define CyTCOR		(0xc0)
+#define CySCHR1		(0x1f)
+#define CySCHR2 	(0x1e)
+#define CyTPR		(0xda)
+#define CyPILR1		(0xe3)
+#define CyPILR2		(0xe0)
+#define CyPILR3		(0xe1)
+#define CyCMR		(0x1b)
+#define      CyASYNC		(0x02)
+#define CyLICR          (0x26)
+#define CyLIVR          (0x09)
+#define CySCRL		(0x23)
+#define CySCRH		(0x22)
+#define CyTFTC		(0x80)
+
+void mvme16x_cons_write(struct console *co, const char *str, unsigned count)
+{
+	volatile unsigned char *base_addr = (u_char *)CD2401_ADDR;
+	volatile u_char sink;
+	u_char ier;
+	int port;
+	u_char do_lf = 0;
+	int i = 0;
+
+	/* Ensure transmitter is enabled! */
+
+	port = 0;
+	base_addr[CyCAR] = (u_char)port;
+	while (base_addr[CyCCR])
+		;
+	base_addr[CyCCR] = CyENB_XMTR;
+
+	ier = base_addr[CyIER];
+	base_addr[CyIER] = CyTxMpty;
+
+	while (1) {
+		if (pcc2chip[PccSCCTICR] & 0x20)
+		{
+			/* We have a Tx int. Acknowledge it */
+			sink = pcc2chip[PccTPIACKR];
+			if ((base_addr[CyLICR] >> 2) == port) {
+				if (i == count) {
+					/* Last char of string is now output */
+					base_addr[CyTEOIR] = CyNOTRANS;
+					break;
+				}
+				if (do_lf) {
+					base_addr[CyTDR] = '\n';
+					str++;
+					i++;
+					do_lf = 0;
+				}
+				else if (*str == '\n') {
+					base_addr[CyTDR] = '\r';
+					do_lf = 1;
+				}
+				else {
+					base_addr[CyTDR] = *str++;
+					i++;
+				}
+				base_addr[CyTEOIR] = 0;
+			}
+			else
+				base_addr[CyTEOIR] = CyNOTRANS;
+		}
+	}
+
+	base_addr[CyIER] = ier;
+}
+
+#endif
+
+void __init config_mvme16x(void)
+{
+    p_bdid p = &mvme_bdid;
+    char id[40];
+    uint16_t brdno = be16_to_cpu(p->brdno);
+
+    mach_max_dma_address = 0xffffffff;
+    mach_sched_init      = mvme16x_sched_init;
+    mach_init_IRQ        = mvme16x_init_IRQ;
+    arch_gettimeoffset   = mvme16x_gettimeoffset;
+    mach_hwclk           = mvme16x_hwclk;
+    mach_set_clock_mmss	 = mvme16x_set_clock_mmss;
+    mach_reset		 = mvme16x_reset;
+    mach_get_model       = mvme16x_get_model;
+    mach_get_hardware_list = mvme16x_get_hardware_list;
+
+    /* Report board revision */
+
+    if (strncmp("BDID", p->bdid, 4))
+    {
+	printk ("\n\nBug call .BRD_ID returned garbage - giving up\n\n");
+	while (1)
+		;
+    }
+    /* Board type is only set by newer versions of vmelilo/tftplilo */
+    if (vme_brdtype == 0)
+	vme_brdtype = brdno;
+
+    mvme16x_get_model(id);
+    printk ("\nBRD_ID: %s   BUG %x.%x %02x/%02x/%02x\n", id, p->rev>>4,
+					p->rev&0xf, p->yr, p->mth, p->day);
+    if (brdno == 0x0162 || brdno == 0x172)
+    {
+	unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
+
+	mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA;
+
+	printk ("MVME%x Hardware status:\n", brdno);
+	printk ("    CPU Type           68%s040\n",
+			rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC");
+	printk ("    CPU clock          %dMHz\n",
+			rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25);
+	printk ("    VMEchip2           %spresent\n",
+			rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
+	printk ("    SCSI interface     %spresent\n",
+			rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
+	printk ("    Ethernet interface %spresent\n",
+			rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
+    }
+    else
+    {
+	mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401;
+    }
+}
+
+static irqreturn_t mvme16x_abort_int (int irq, void *dev_id)
+{
+	unsigned long *new = (unsigned long *)vectors;
+	unsigned long *old = (unsigned long *)0xffe00000;
+	volatile unsigned char uc, *ucp;
+	uint16_t brdno = be16_to_cpu(mvme_bdid.brdno);
+
+	if (brdno == 0x0162 || brdno == 0x172)
+	{
+		ucp = (volatile unsigned char *)0xfff42043;
+		uc = *ucp | 8;
+		*ucp = uc;
+	}
+	else
+	{
+		*(volatile unsigned long *)0xfff40074 = 0x40000000;
+	}
+	*(new+4) = *(old+4);		/* Illegal instruction */
+	*(new+9) = *(old+9);		/* Trace */
+	*(new+47) = *(old+47);		/* Trap #15 */
+
+	if (brdno == 0x0162 || brdno == 0x172)
+		*(new+0x5e) = *(old+0x5e);	/* ABORT switch */
+	else
+		*(new+0x6e) = *(old+0x6e);	/* ABORT switch */
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t mvme16x_timer_int (int irq, void *dev_id)
+{
+    *(volatile unsigned char *)0xfff4201b |= 8;
+    return tick_handler(irq, dev_id);
+}
+
+void mvme16x_sched_init (irq_handler_t timer_routine)
+{
+    uint16_t brdno = be16_to_cpu(mvme_bdid.brdno);
+    int irq;
+
+    tick_handler = timer_routine;
+    /* Using PCCchip2 or MC2 chip tick timer 1 */
+    *(volatile unsigned long *)0xfff42008 = 0;
+    *(volatile unsigned long *)0xfff42004 = 10000;	/* 10ms */
+    *(volatile unsigned char *)0xfff42017 |= 3;
+    *(volatile unsigned char *)0xfff4201b = 0x16;
+    if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, 0,
+				"timer", mvme16x_timer_int))
+	panic ("Couldn't register timer int");
+
+    if (brdno == 0x0162 || brdno == 0x172)
+	irq = MVME162_IRQ_ABORT;
+    else
+        irq = MVME167_IRQ_ABORT;
+    if (request_irq(irq, mvme16x_abort_int, 0,
+				"abort", mvme16x_abort_int))
+	panic ("Couldn't register abort int");
+}
+
+
+/* This is always executed with interrupts disabled.  */
+u32 mvme16x_gettimeoffset(void)
+{
+    return (*(volatile u32 *)0xfff42008) * 1000;
+}
+
+int bcd2int (unsigned char b)
+{
+	return ((b>>4)*10 + (b&15));
+}
+
+int mvme16x_hwclk(int op, struct rtc_time *t)
+{
+#warning check me!
+	if (!op) {
+		rtc->ctrl = RTC_READ;
+		t->tm_year = bcd2int (rtc->bcd_year);
+		t->tm_mon  = bcd2int (rtc->bcd_mth);
+		t->tm_mday = bcd2int (rtc->bcd_dom);
+		t->tm_hour = bcd2int (rtc->bcd_hr);
+		t->tm_min  = bcd2int (rtc->bcd_min);
+		t->tm_sec  = bcd2int (rtc->bcd_sec);
+		rtc->ctrl = 0;
+	}
+	return 0;
+}
+
+int mvme16x_set_clock_mmss (unsigned long nowtime)
+{
+	return 0;
+}
+
diff --git a/kernel/arch/m68k/mvme16x/rtc.c b/kernel/arch/m68k/mvme16x/rtc.c
new file mode 100644
index 000000000..1755e2f71
--- /dev/null
+++ b/kernel/arch/m68k/mvme16x/rtc.c
@@ -0,0 +1,164 @@
+/*
+ *	Real Time Clock interface for Linux on the MVME16x
+ *
+ * Based on the PC driver by Paul Gortmaker.
+ */
+
+#define RTC_VERSION		"1.00"
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/miscdevice.h>
+#include <linux/ioport.h>
+#include <linux/capability.h>
+#include <linux/fcntl.h>
+#include <linux/init.h>
+#include <linux/poll.h>
+#include <linux/mc146818rtc.h>	/* For struct rtc_time and ioctls, etc */
+#include <linux/bcd.h>
+#include <asm/mvme16xhw.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/setup.h>
+
+/*
+ *	We sponge a minor off of the misc major. No need slurping
+ *	up another valuable major dev number for this. If you add
+ *	an ioctl, make sure you don't conflict with SPARC's RTC
+ *	ioctls.
+ */
+
+static const unsigned char days_in_mo[] =
+{0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
+
+static atomic_t rtc_ready = ATOMIC_INIT(1);
+
+static long rtc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	volatile MK48T08ptr_t rtc = (MK48T08ptr_t)MVME_RTC_BASE;
+	unsigned long flags;
+	struct rtc_time wtime;
+	void __user *argp = (void __user *)arg;
+
+	switch (cmd) {
+	case RTC_RD_TIME:	/* Read the time/date from RTC	*/
+	{
+		local_irq_save(flags);
+		/* Ensure clock and real-time-mode-register are accessible */
+		rtc->ctrl = RTC_READ;
+		memset(&wtime, 0, sizeof(struct rtc_time));
+		wtime.tm_sec =  bcd2bin(rtc->bcd_sec);
+		wtime.tm_min =  bcd2bin(rtc->bcd_min);
+		wtime.tm_hour = bcd2bin(rtc->bcd_hr);
+		wtime.tm_mday =  bcd2bin(rtc->bcd_dom);
+		wtime.tm_mon =  bcd2bin(rtc->bcd_mth)-1;
+		wtime.tm_year = bcd2bin(rtc->bcd_year);
+		if (wtime.tm_year < 70)
+			wtime.tm_year += 100;
+		wtime.tm_wday = bcd2bin(rtc->bcd_dow)-1;
+		rtc->ctrl = 0;
+		local_irq_restore(flags);
+		return copy_to_user(argp, &wtime, sizeof wtime) ?
+								-EFAULT : 0;
+	}
+	case RTC_SET_TIME:	/* Set the RTC */
+	{
+		struct rtc_time rtc_tm;
+		unsigned char mon, day, hrs, min, sec, leap_yr;
+		unsigned int yrs;
+
+		if (!capable(CAP_SYS_ADMIN))
+			return -EACCES;
+
+		if (copy_from_user(&rtc_tm, argp, sizeof(struct rtc_time)))
+			return -EFAULT;
+
+		yrs = rtc_tm.tm_year;
+		if (yrs < 1900)
+			yrs += 1900;
+		mon = rtc_tm.tm_mon + 1;   /* tm_mon starts at zero */
+		day = rtc_tm.tm_mday;
+		hrs = rtc_tm.tm_hour;
+		min = rtc_tm.tm_min;
+		sec = rtc_tm.tm_sec;
+
+		leap_yr = ((!(yrs % 4) && (yrs % 100)) || !(yrs % 400));
+
+		if ((mon > 12) || (day == 0))
+			return -EINVAL;
+
+		if (day > (days_in_mo[mon] + ((mon == 2) && leap_yr)))
+			return -EINVAL;
+
+		if ((hrs >= 24) || (min >= 60) || (sec >= 60))
+			return -EINVAL;
+
+		if (yrs >= 2070)
+			return -EINVAL;
+
+		local_irq_save(flags);
+		rtc->ctrl     = RTC_WRITE;
+
+		rtc->bcd_sec  = bin2bcd(sec);
+		rtc->bcd_min  = bin2bcd(min);
+		rtc->bcd_hr   = bin2bcd(hrs);
+		rtc->bcd_dom  = bin2bcd(day);
+		rtc->bcd_mth  = bin2bcd(mon);
+		rtc->bcd_year = bin2bcd(yrs%100);
+
+		rtc->ctrl     = 0;
+		local_irq_restore(flags);
+		return 0;
+	}
+	default:
+		return -EINVAL;
+	}
+}
+
+/*
+ * We enforce only one user at a time here with the open/close.
+ */
+static int rtc_open(struct inode *inode, struct file *file)
+{
+	if( !atomic_dec_and_test(&rtc_ready) )
+	{
+		atomic_inc( &rtc_ready );
+		return -EBUSY;
+	}
+	return 0;
+}
+
+static int rtc_release(struct inode *inode, struct file *file)
+{
+	atomic_inc( &rtc_ready );
+	return 0;
+}
+
+/*
+ *	The various file operations we support.
+ */
+
+static const struct file_operations rtc_fops = {
+	.unlocked_ioctl	= rtc_ioctl,
+	.open		= rtc_open,
+	.release	= rtc_release,
+	.llseek		= noop_llseek,
+};
+
+static struct miscdevice rtc_dev=
+{
+	.minor =	RTC_MINOR,
+	.name =		"rtc",
+	.fops =		&rtc_fops
+};
+
+static int __init rtc_MK48T08_init(void)
+{
+	if (!MACH_IS_MVME16x)
+		return -ENODEV;
+
+	printk(KERN_INFO "MK48T08 Real Time Clock Driver v%s\n", RTC_VERSION);
+	return misc_register(&rtc_dev);
+}
+device_initcall(rtc_MK48T08_init);