8 files changed, 127 insertions, 25 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index f1a3b10cfa9e..4f870207f496 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -156,7 +156,6 @@ config ARCH_MTD_XIP
         bool
 
 config GENERIC_HARDIRQS_NO__DO_IRQ
-        bool
         def_bool y
 
 if OPROFILE
@@ -288,6 +287,8 @@ config ARCH_NETX
         bool "Hilscher NetX based"
         select CPU_ARM926T
         select ARM_VIC
+        select GENERIC_CLOCKEVENTS
+        select GENERIC_TIME
         help
           This enables support for systems based on the Hilscher NetX Soc
 
diff --git a/arch/arm/configs/netx_defconfig b/arch/arm/configs/netx_defconfig
index 0884f2370c3a..61d0fc5b2417 100644
--- a/arch/arm/configs/netx_defconfig
+++ b/arch/arm/configs/netx_defconfig
@@ -728,9 +728,9 @@ CONFIG_RTC_CLASS=m
 #
 # RTC interfaces
 #
-CONFIG_RTC_INTF_SYSFS=m
-CONFIG_RTC_INTF_PROC=m
-CONFIG_RTC_INTF_DEV=m
+CONFIG_RTC_INTF_SYSFS=y
+CONFIG_RTC_INTF_PROC=y
+CONFIG_RTC_INTF_DEV=y
 
 #
 # RTC drivers
diff --git a/arch/arm/configs/picotux200_defconfig b/arch/arm/configs/picotux200_defconfig
index 14826f0dabde..59e4463c2da2 100644
--- a/arch/arm/configs/picotux200_defconfig
+++ b/arch/arm/configs/picotux200_defconfig
@@ -1069,9 +1069,9 @@ CONFIG_RTC_CLASS=m
 #
 # RTC interfaces
 #
-CONFIG_RTC_INTF_SYSFS=m
-CONFIG_RTC_INTF_PROC=m
-CONFIG_RTC_INTF_DEV=m
+CONFIG_RTC_INTF_SYSFS=y
+CONFIG_RTC_INTF_PROC=y
+CONFIG_RTC_INTF_DEV=y
 # CONFIG_RTC_INTF_DEV_UIE_EMUL is not set
 
 #
diff --git a/arch/arm/kernel/ftrace.c b/arch/arm/kernel/ftrace.c
index 6c90479e8974..c63842766229 100644
--- a/arch/arm/kernel/ftrace.c
+++ b/arch/arm/kernel/ftrace.c
@@ -95,7 +95,7 @@ int ftrace_update_ftrace_func(ftrace_func_t func)
         return ret;
 }
 
-/* run from kstop_machine */
+/* run from ftrace_init with irqs disabled */
 int __init ftrace_dyn_arch_init(void *data)
 {
         ftrace_mcount_set(data);
diff --git a/arch/arm/mach-at91/at91rm9200_time.c b/arch/arm/mach-at91/at91rm9200_time.c
index a72e798a2a40..d140eae53ded 100644
--- a/arch/arm/mach-at91/at91rm9200_time.c
+++ b/arch/arm/mach-at91/at91rm9200_time.c
@@ -141,6 +141,15 @@ clkevt32k_next_event(unsigned long delta, struct clock_event_device *dev)
         /* Use "raw" primitives so we behave correctly on RT kernels. */
         raw_local_irq_save(flags);
 
+        /*
+         * According to Thomas Gleixner irqs are already disabled here.  Simply
+         * removing raw_local_irq_save above (and the matching
+         * raw_local_irq_restore) was not accepted.  See
+         * http://thread.gmane.org/gmane.linux.ports.arm.kernel/41174
+         * So for now (2008-11-20) just warn once if irqs were not disabled ...
+         */
+        WARN_ON_ONCE(!raw_irqs_disabled_flags(flags));
+
         /* The alarm IRQ uses absolute time (now+delta), not the relative
          * time (delta) in our calling convention.  Like all clockevents
          * using such "match" hardware, we have a race to defend against.
diff --git a/arch/arm/mach-netx/include/mach/netx-regs.h b/arch/arm/mach-netx/include/mach/netx-regs.h
index 5104a00d40f4..08c60ff227be 100644
--- a/arch/arm/mach-netx/include/mach/netx-regs.h
+++ b/arch/arm/mach-netx/include/mach/netx-regs.h
@@ -328,6 +328,28 @@
 #define NETX_PFIFO_FILL_LEVEL(pfifo)  NETX_PFIFO_REG(0x180 + ((pfifo)<<2))
 #define NETX_PFIFO_XPEC_ISR(xpec)     NETX_PFIFO_REG(0x400 + ((xpec) << 2))
 
+
+/*******************************
+ * Memory Controller           *
+ *******************************/
+
+/* Registers */
+#define NETX_MEMCR_REG(ofs)               __io(NETX_VA_MEMCR + (ofs))
+#define NETX_MEMCR_SRAM_CTRL(cs)      NETX_MEMCR_REG(0x0 + 4 * (cs)) /* SRAM for CS 0..2 */
+#define NETX_MEMCR_SDRAM_CFG_CTRL     NETX_MEMCR_REG(0x40)
+#define NETX_MEMCR_SDRAM_TIMING_CTRL  NETX_MEMCR_REG(0x44)
+#define NETX_MEMCR_SDRAM_MODE         NETX_MEMCR_REG(0x48)
+#define NETX_MEMCR_SDRAM_EXT_MODE     NETX_MEMCR_REG(0x4c)
+#define NETX_MEMCR_PRIO_TIMESLOT_CTRL NETX_MEMCR_REG(0x80)
+#define NETX_MEMCR_PRIO_ACCESS_CTRL   NETX_MEMCR_REG(0x84)
+
+/* Bits */
+#define NETX_MEMCR_SRAM_CTRL_WIDTHEXTMEM(x)       (((x) & 0x3)  << 24)
+#define NETX_MEMCR_SRAM_CTRL_WSPOSTPAUSEEXTMEM(x) (((x) & 0x3)  << 16)
+#define NETX_MEMCR_SRAM_CTRL_WSPREPASEEXTMEM(x)   (((x) & 0x3)  << 8)
+#define NETX_MEMCR_SRAM_CTRL_WSEXTMEM(x)          (((x) & 0x1f) << 0)
+
+
 /*******************************
  * Dual Port Memory            *
  *******************************/
diff --git a/arch/arm/mach-netx/time.c b/arch/arm/mach-netx/time.c
index 7c540c1f01fa..d51d627ce7cf 100644
--- a/arch/arm/mach-netx/time.c
+++ b/arch/arm/mach-netx/time.c
@@ -21,43 +21,100 @@
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/clocksource.h>
+#include <linux/clockchips.h>
 #include <linux/io.h>
 
 #include <mach/hardware.h>
 #include <asm/mach/time.h>
 #include <mach/netx-regs.h>
 
+#define TIMER_CLOCKEVENT 0
+#define TIMER_CLOCKSOURCE 1
+
+static void netx_set_mode(enum clock_event_mode mode,
+                struct clock_event_device *clk)
+{
+        u32 tmode;
+
+        /* disable timer */
+        writel(0, NETX_GPIO_COUNTER_CTRL(TIMER_CLOCKEVENT));
+
+        switch (mode) {
+        case CLOCK_EVT_MODE_PERIODIC:
+                writel(LATCH, NETX_GPIO_COUNTER_MAX(TIMER_CLOCKEVENT));
+                tmode = NETX_GPIO_COUNTER_CTRL_RST_EN |
+                        NETX_GPIO_COUNTER_CTRL_IRQ_EN |
+                        NETX_GPIO_COUNTER_CTRL_RUN;
+                break;
+
+        case CLOCK_EVT_MODE_ONESHOT:
+                writel(0, NETX_GPIO_COUNTER_MAX(TIMER_CLOCKEVENT));
+                tmode = NETX_GPIO_COUNTER_CTRL_IRQ_EN |
+                        NETX_GPIO_COUNTER_CTRL_RUN;
+                break;
+
+        default:
+                WARN(1, "%s: unhandled mode %d\n", __func__, mode);
+                /* fall through */
+
+        case CLOCK_EVT_MODE_SHUTDOWN:
+        case CLOCK_EVT_MODE_UNUSED:
+        case CLOCK_EVT_MODE_RESUME:
+                tmode = 0;
+                break;
+        }
+
+        writel(tmode, NETX_GPIO_COUNTER_CTRL(TIMER_CLOCKEVENT));
+}
+
+static int netx_set_next_event(unsigned long evt,
+                struct clock_event_device *clk)
+{
+        writel(0 - evt, NETX_GPIO_COUNTER_CURRENT(TIMER_CLOCKEVENT));
+        return 0;
+}
+
+static struct clock_event_device netx_clockevent = {
+        .name = "netx-timer" __stringify(TIMER_CLOCKEVENT),
+        .shift = 32,
+        .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
+        .set_next_event = netx_set_next_event,
+        .set_mode = netx_set_mode,
+};
+
 /*
  * IRQ handler for the timer
  */
 static irqreturn_t
 netx_timer_interrupt(int irq, void *dev_id)
 {
-        timer_tick();
+        struct clock_event_device *evt = &netx_clockevent;
 
         /* acknowledge interrupt */
         writel(COUNTER_BIT(0), NETX_GPIO_IRQ);
 
+        evt->event_handler(evt);
+
         return IRQ_HANDLED;
 }
 
 static struct irqaction netx_timer_irq = {
-        .name           = "NetX Timer Tick",
-        .flags          = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
-        .handler        = netx_timer_interrupt,
+        .name           = "NetX Timer Tick",
+        .flags          = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
+        .handler        = netx_timer_interrupt,
 };
 
 cycle_t netx_get_cycles(void)
 {
-        return readl(NETX_GPIO_COUNTER_CURRENT(1));
+        return readl(NETX_GPIO_COUNTER_CURRENT(TIMER_CLOCKSOURCE));
 }
 
 static struct clocksource clocksource_netx = {
-        .name           = "netx_timer",
+        .name           = "netx_timer",
         .rating         = 200,
         .read           = netx_get_cycles,
         .mask           = CLOCKSOURCE_MASK(32),
-        .shift          = 20,
+        .shift          = 20,
         .flags          = CLOCK_SOURCE_IS_CONTINUOUS,
 };
 
@@ -77,24 +134,37 @@ static void __init netx_timer_init(void)
         /* acknowledge interrupt */
         writel(COUNTER_BIT(0), NETX_GPIO_IRQ);
 
-        /* Enable the interrupt in the specific timer register and start timer */
+        /* Enable the interrupt in the specific timer
+         * register and start timer
+         */
         writel(COUNTER_BIT(0), NETX_GPIO_IRQ_ENABLE);
         writel(NETX_GPIO_COUNTER_CTRL_IRQ_EN | NETX_GPIO_COUNTER_CTRL_RUN,
-                NETX_GPIO_COUNTER_CTRL(0));
+                        NETX_GPIO_COUNTER_CTRL(0));
 
         setup_irq(NETX_IRQ_TIMER0, &netx_timer_irq);
 
         /* Setup timer one for clocksource */
-        writel(0, NETX_GPIO_COUNTER_CTRL(1));
-        writel(0, NETX_GPIO_COUNTER_CURRENT(1));
-        writel(0xFFFFFFFF, NETX_GPIO_COUNTER_MAX(1));
+        writel(0, NETX_GPIO_COUNTER_CTRL(TIMER_CLOCKSOURCE));
+        writel(0, NETX_GPIO_COUNTER_CURRENT(TIMER_CLOCKSOURCE));
+        writel(0xffffffff, NETX_GPIO_COUNTER_MAX(TIMER_CLOCKSOURCE));
 
-        writel(NETX_GPIO_COUNTER_CTRL_RUN,
-                NETX_GPIO_COUNTER_CTRL(1));
+        writel(NETX_GPIO_COUNTER_CTRL_RUN,
+                        NETX_GPIO_COUNTER_CTRL(TIMER_CLOCKSOURCE));
 
         clocksource_netx.mult =
                 clocksource_hz2mult(CLOCK_TICK_RATE, clocksource_netx.shift);
         clocksource_register(&clocksource_netx);
+
+        netx_clockevent.mult = div_sc(CLOCK_TICK_RATE, NSEC_PER_SEC,
+                        netx_clockevent.shift);
+        netx_clockevent.max_delta_ns =
+                clockevent_delta2ns(0xfffffffe, &netx_clockevent);
+        /* with max_delta_ns >= delta2ns(0x800) the system currently runs fine.
+         * Adding some safety ... */
+        netx_clockevent.min_delta_ns =
+                clockevent_delta2ns(0xa00, &netx_clockevent);
+        netx_clockevent.cpumask = cpumask_of_cpu(0);
+        clockevents_register_device(&netx_clockevent);
 }
 
 struct sys_timer netx_timer = {
diff --git a/arch/arm/mach-netx/xc.c b/arch/arm/mach-netx/xc.c
index 32eabf5dfa4f..8fc6205dc3a5 100644
--- a/arch/arm/mach-netx/xc.c
+++ b/arch/arm/mach-netx/xc.c
@@ -92,10 +92,10 @@ static int xc_check_ptr(struct xc *x, unsigned long adr, unsigned int size)
         return -1;
 }
 
-static int xc_patch(struct xc *x, void *patch, int count)
+static int xc_patch(struct xc *x, const void *patch, int count)
 {
         unsigned int val, adr;
-        unsigned int *data = patch;
+        const unsigned int *data = patch;
 
         int i;
         for (i = 0; i < count; i++) {
@@ -117,7 +117,7 @@ int xc_request_firmware(struct xc *x)
         struct fw_header *head;
         unsigned int size;
         int i;
-        void *src;
+        const void *src;
         unsigned long dst;
 
         sprintf(name, "xc%d.bin", x->no);