Merge branch 'linus' into perfcounters/core

Merge reason: This brach was on -rc1, refresh it to almost-rc4 to pick up
              the latest upstream fixes.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

4 files changed, 351 insertions, 0 deletions

diff --git a/arch/mn10300/unit-asb2305/include/unit/clock.h b/arch/mn10300/unit-asb2305/include/unit/clock.h
new file mode 100644
index 00000000000..7d514841ffd
--- /dev/null
+++ b/arch/mn10300/unit-asb2305/include/unit/clock.h
@@ -0,0 +1,45 @@
+/* ASB2305-specific clocks
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#ifndef _ASM_UNIT_CLOCK_H
+#define _ASM_UNIT_CLOCK_H
+
+#ifndef __ASSEMBLY__
+
+#ifdef CONFIG_MN10300_RTC
+
+extern unsigned long mn10300_ioclk;	/* IOCLK (crystal speed) in HZ */
+extern unsigned long mn10300_iobclk;
+extern unsigned long mn10300_tsc_per_HZ;
+
+#define MN10300_IOCLK		((unsigned long)mn10300_ioclk)
+/* If this processors has a another clock, uncomment the below. */
+/* #define MN10300_IOBCLK	((unsigned long)mn10300_iobclk) */
+
+#else /* !CONFIG_MN10300_RTC */
+
+#define MN10300_IOCLK		33333333UL
+/* #define MN10300_IOBCLK	66666666UL */
+
+#endif /* !CONFIG_MN10300_RTC */
+
+#define MN10300_JCCLK		MN10300_IOCLK
+#define MN10300_TSCCLK		MN10300_IOCLK
+
+#ifdef CONFIG_MN10300_RTC
+#define MN10300_TSC_PER_HZ	((unsigned long)mn10300_tsc_per_HZ)
+#else /* !CONFIG_MN10300_RTC */
+#define MN10300_TSC_PER_HZ	(MN10300_TSCCLK/HZ)
+#endif /* !CONFIG_MN10300_RTC */
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* _ASM_UNIT_CLOCK_H */
diff --git a/arch/mn10300/unit-asb2305/include/unit/leds.h b/arch/mn10300/unit-asb2305/include/unit/leds.h
new file mode 100644
index 00000000000..bc471f617fd
--- /dev/null
+++ b/arch/mn10300/unit-asb2305/include/unit/leds.h
@@ -0,0 +1,51 @@
+/* ASB2305-specific LEDs
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#ifndef _ASM_UNIT_LEDS_H
+#define _ASM_UNIT_LEDS_H
+
+#include <asm/pio-regs.h>
+#include <asm/cpu-regs.h>
+#include <asm/exceptions.h>
+
+#define ASB2305_7SEGLEDS	__SYSREG(0xA6F90000, u32)
+
+/* perform a hard reset by driving PIO06 low */
+#define mn10300_unit_hard_reset()		\
+do {						\
+	P0OUT &= 0xbf;				\
+	P0MD = (P0MD & P0MD_6) | P0MD_6_OUT;	\
+} while (0)
+
+/*
+ * use the 7-segment LEDs to indicate states
+ */
+/* indicate double-fault by displaying "db-f" on the LEDs */
+#define mn10300_set_dbfleds			\
+	mov	0x43077f1d,d0		;	\
+	mov	d0,(ASB2305_7SEGLEDS)
+
+/* flip the 7-segment LEDs between "Gdb-" and "----" */
+#define mn10300_set_gdbleds(ONOFF)				\
+do {								\
+	ASB2305_7SEGLEDS = (ONOFF) ? 0x8543077f : 0x7f7f7f7f;	\
+} while (0)
+
+#ifndef __ASSEMBLY__
+extern void peripheral_leds_display_exception(enum exception_code);
+extern void peripheral_leds_led_chase(void);
+extern void peripheral_leds7x4_display_dec(unsigned int, unsigned int);
+extern void peripheral_leds7x4_display_hex(unsigned int, unsigned int);
+extern void peripheral_leds7x4_display_minssecs(unsigned int, unsigned int);
+extern void peripheral_leds7x4_display_rtc(void);
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ASM_UNIT_LEDS_H */
diff --git a/arch/mn10300/unit-asb2305/include/unit/serial.h b/arch/mn10300/unit-asb2305/include/unit/serial.h
new file mode 100644
index 00000000000..3bfc9093878
--- /dev/null
+++ b/arch/mn10300/unit-asb2305/include/unit/serial.h
@@ -0,0 +1,120 @@
+/* ASB2305-specific 8250 serial ports
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#ifndef _ASM_UNIT_SERIAL_H
+#define _ASM_UNIT_SERIAL_H
+
+#include <asm/cpu/cpu-regs.h>
+#include <proc/irq.h>
+#include <linux/serial_reg.h>
+
+#define SERIAL_PORT0_BASE_ADDRESS	0xA6FB0000
+#define ASB2305_DEBUG_MCR	__SYSREG(0xA6FB0000 + UART_MCR * 2, u8)
+
+#define SERIAL_IRQ	XIRQ0	/* Dual serial (PC16552)	(Hi) */
+
+/*
+ * dispose of the /dev/ttyS0 serial port
+ */
+#ifndef CONFIG_GDBSTUB_ON_TTYSx
+
+#define SERIAL_PORT_DFNS						\
+	{								\
+	.baud_base		= BASE_BAUD,				\
+	.irq			= SERIAL_IRQ,				\
+	.flags			= STD_COM_FLAGS,			\
+	.iomem_base		= (u8 *) SERIAL_PORT0_BASE_ADDRESS,	\
+	.iomem_reg_shift	= 2,					\
+	.io_type		= SERIAL_IO_MEM,			\
+	},
+
+#ifndef __ASSEMBLY__
+
+static inline void __debug_to_serial(const char *p, int n)
+{
+}
+
+#endif /* !__ASSEMBLY__ */
+
+#else /* CONFIG_GDBSTUB_ON_TTYSx */
+
+#define SERIAL_PORT_DFNS /* stolen by gdb-stub */
+
+#if defined(CONFIG_GDBSTUB_ON_TTYS0)
+#define GDBPORT_SERIAL_RX	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_RX  * 4, u8)
+#define GDBPORT_SERIAL_TX	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_TX  * 4, u8)
+#define GDBPORT_SERIAL_DLL	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_DLL * 4, u8)
+#define GDBPORT_SERIAL_DLM	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_DLM * 4, u8)
+#define GDBPORT_SERIAL_IER	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_IER * 4, u8)
+#define GDBPORT_SERIAL_IIR	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_IIR * 4, u8)
+#define GDBPORT_SERIAL_FCR	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_FCR * 4, u8)
+#define GDBPORT_SERIAL_LCR	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_LCR * 4, u8)
+#define GDBPORT_SERIAL_MCR	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_MCR * 4, u8)
+#define GDBPORT_SERIAL_LSR	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_LSR * 4, u8)
+#define GDBPORT_SERIAL_MSR	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_MSR * 4, u8)
+#define GDBPORT_SERIAL_SCR	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_SCR * 4, u8)
+#define GDBPORT_SERIAL_IRQ	SERIAL_IRQ
+
+#elif defined(CONFIG_GDBSTUB_ON_TTYS1)
+#error The ASB2305 doesnt have a /dev/ttyS1
+#endif
+
+#ifndef __ASSEMBLY__
+
+#define TTYS0_TX	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_TX  * 4, u8)
+#define TTYS0_MCR	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_MCR * 4, u8)
+#define TTYS0_LSR	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_LSR * 4, u8)
+#define TTYS0_MSR	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_MSR * 4, u8)
+
+#define LSR_WAIT_FOR(STATE)				\
+do {							\
+	while (!(TTYS0_LSR & UART_LSR_##STATE)) {}	\
+} while (0)
+#define FLOWCTL_WAIT_FOR(LINE)				\
+do {							\
+	while (!(TTYS0_MSR & UART_MSR_##LINE)) {}	\
+} while (0)
+#define FLOWCTL_CLEAR(LINE)			\
+do {						\
+	TTYS0_MCR &= ~UART_MCR_##LINE;		\
+} while (0)
+#define FLOWCTL_SET(LINE)			\
+do {						\
+	TTYS0_MCR |= UART_MCR_##LINE;		\
+} while (0)
+#define FLOWCTL_QUERY(LINE)	({ TTYS0_MSR & UART_MSR_##LINE; })
+
+static inline void __debug_to_serial(const char *p, int n)
+{
+	char ch;
+
+	FLOWCTL_SET(DTR);
+
+	for (; n > 0; n--) {
+		LSR_WAIT_FOR(THRE);
+		FLOWCTL_WAIT_FOR(CTS);
+
+		ch = *p++;
+		if (ch == 0x0a) {
+			TTYS0_TX = 0x0d;
+			LSR_WAIT_FOR(THRE);
+			FLOWCTL_WAIT_FOR(CTS);
+		}
+		TTYS0_TX = ch;
+	}
+
+	FLOWCTL_CLEAR(DTR);
+}
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* CONFIG_GDBSTUB_ON_TTYSx */
+
+#endif /* _ASM_UNIT_SERIAL_H */
diff --git a/arch/mn10300/unit-asb2305/include/unit/timex.h b/arch/mn10300/unit-asb2305/include/unit/timex.h
new file mode 100644
index 00000000000..a71c49aa85e
--- /dev/null
+++ b/arch/mn10300/unit-asb2305/include/unit/timex.h
@@ -0,0 +1,135 @@
+/* ASB2305 timer specifcations
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#ifndef _ASM_UNIT_TIMEX_H
+#define _ASM_UNIT_TIMEX_H
+
+#ifndef __ASSEMBLY__
+#include <linux/irq.h>
+#endif /* __ASSEMBLY__ */
+
+#include <asm/cpu/timer-regs.h>
+#include <unit/clock.h>
+
+/*
+ * jiffies counter specifications
+ */
+
+#define	TMJCBR_MAX		0xffff
+#define	TMJCBC			TM01BC
+
+#define	TMJCMD			TM01MD
+#define	TMJCBR			TM01BR
+#define	TMJCIRQ			TM1IRQ
+#define	TMJCICR			TM1ICR
+#define	TMJCICR_LEVEL		GxICR_LEVEL_5
+
+#ifndef __ASSEMBLY__
+
+static inline void startup_jiffies_counter(void)
+{
+	unsigned rate;
+	u16 md, t16;
+
+	/* use as little prescaling as possible to avoid losing accuracy */
+	md = TM0MD_SRC_IOCLK;
+	rate = MN10300_JCCLK / HZ;
+
+	if (rate > TMJCBR_MAX) {
+		md = TM0MD_SRC_IOCLK_8;
+		rate = MN10300_JCCLK / 8 / HZ;
+
+		if (rate > TMJCBR_MAX) {
+			md = TM0MD_SRC_IOCLK_32;
+			rate = MN10300_JCCLK / 32 / HZ;
+
+			if (rate > TMJCBR_MAX)
+				BUG();
+		}
+	}
+
+	TMJCBR = rate - 1;
+	t16 = TMJCBR;
+
+	TMJCMD =
+		md |
+		TM1MD_SRC_TM0CASCADE << 8 |
+		TM0MD_INIT_COUNTER |
+		TM1MD_INIT_COUNTER << 8;
+
+	TMJCMD =
+		md |
+		TM1MD_SRC_TM0CASCADE << 8 |
+		TM0MD_COUNT_ENABLE |
+		TM1MD_COUNT_ENABLE << 8;
+
+	t16 = TMJCMD;
+
+	TMJCICR |= GxICR_ENABLE | GxICR_DETECT | GxICR_REQUEST;
+	t16 = TMJCICR;
+}
+
+static inline void shutdown_jiffies_counter(void)
+{
+}
+
+#endif /* !__ASSEMBLY__ */
+
+
+/*
+ * timestamp counter specifications
+ */
+
+#define	TMTSCBR_MAX		0xffffffff
+#define	TMTSCBC			TM45BC
+
+#ifndef __ASSEMBLY__
+
+static inline void startup_timestamp_counter(void)
+{
+	/* set up timer 4 & 5 cascaded as a 32-bit counter to count real time
+	 * - count down from 4Gig-1 to 0 and wrap at IOCLK rate
+	 */
+	TM45BR = TMTSCBR_MAX;
+
+	TM4MD = TM4MD_SRC_IOCLK;
+	TM4MD |= TM4MD_INIT_COUNTER;
+	TM4MD &= ~TM4MD_INIT_COUNTER;
+	TM4ICR = 0;
+
+	TM5MD = TM5MD_SRC_TM4CASCADE;
+	TM5MD |= TM5MD_INIT_COUNTER;
+	TM5MD &= ~TM5MD_INIT_COUNTER;
+	TM5ICR = 0;
+
+	TM5MD |= TM5MD_COUNT_ENABLE;
+	TM4MD |= TM4MD_COUNT_ENABLE;
+}
+
+static inline void shutdown_timestamp_counter(void)
+{
+	TM4MD = 0;
+	TM5MD = 0;
+}
+
+/*
+ * we use a cascaded pair of 16-bit down-counting timers to count I/O
+ * clock cycles for the purposes of time keeping
+ */
+typedef unsigned long cycles_t;
+
+static inline cycles_t read_timestamp_counter(void)
+{
+	return (cycles_t) TMTSCBC;
+}
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* _ASM_UNIT_TIMEX_H */