init commit via android 4.4 uboot

1 files changed, 651 insertions, 0 deletions

diff --git a/board/integratorap/integratorap.c b/board/integratorap/integratorap.c
new file mode 100755
index 0000000..d4f61d6
--- /dev/null
+++ b/board/integratorap/integratorap.c
@@ -0,0 +1,651 @@
+/*
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * (C) Copyright 2002
+ * David Mueller, ELSOFT AG, <d.mueller@elsoft.ch>
+ *
+ * (C) Copyright 2003
+ * Texas Instruments, <www.ti.com>
+ * Kshitij Gupta <Kshitij@ti.com>
+ *
+ * (C) Copyright 2004
+ * ARM Ltd.
+ * Philippe Robin, <philippe.robin@arm.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+
+#ifdef CONFIG_PCI
+#include <pci.h>
+#endif
+
+void flash__init (void);
+void ether__init (void);
+void peripheral_power_enable (void);
+
+#if defined(CONFIG_SHOW_BOOT_PROGRESS)
+void show_boot_progress(int progress)
+{
+	printf("Boot reached stage %d\n", progress);
+}
+#endif
+
+#define COMP_MODE_ENABLE ((unsigned int)0x0000EAEF)
+
+static inline void delay (unsigned long loops)
+{
+	__asm__ volatile ("1:\n"
+		"subs %0, %1, #1\n"
+		"bne 1b":"=r" (loops):"0" (loops));
+}
+
+/*
+ * Miscellaneous platform dependent initialisations
+ */
+
+int board_init (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	/* arch number of Integrator Board */
+	gd->bd->bi_arch_number = MACH_TYPE_INTEGRATOR;
+
+	/* adress of boot parameters */
+	gd->bd->bi_boot_params = 0x00000100;
+
+	gd->flags = 0;
+
+#ifdef CONFIG_CM_REMAP
+extern void cm_remap(void);
+	cm_remap();	/* remaps writeable memory to 0x00000000 */
+#endif
+
+	icache_enable ();
+
+	flash__init ();
+	return 0;
+}
+
+
+int misc_init_r (void)
+{
+#ifdef CONFIG_PCI
+	pci_init();
+#endif
+	setenv("verify", "n");
+	return (0);
+}
+
+/*
+ * Initialize PCI Devices, report devices found.
+ */
+#ifdef CONFIG_PCI
+
+#ifndef CONFIG_PCI_PNP
+
+static struct pci_config_table pci_integrator_config_table[] = {
+	{ PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, 0x0f, PCI_ANY_ID,
+	  pci_cfgfunc_config_device, { PCI_ENET0_IOADDR,
+				       PCI_ENET0_MEMADDR,
+				       PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER }},
+	{ }
+};
+#endif
+
+/* V3 access routines */
+#define _V3Write16(o,v) (*(volatile unsigned short *)(PCI_V3_BASE + (unsigned int)(o)) = (unsigned short)(v))
+#define _V3Read16(o)	(*(volatile unsigned short *)(PCI_V3_BASE + (unsigned int)(o)))
+
+#define _V3Write32(o,v) (*(volatile unsigned int *)(PCI_V3_BASE + (unsigned int)(o)) = (unsigned int)(v))
+#define _V3Read32(o)	(*(volatile unsigned int *)(PCI_V3_BASE + (unsigned int)(o)))
+
+/* Compute address necessary to access PCI config space for the given */
+/* bus and device. */
+#define PCI_CONFIG_ADDRESS( __bus, __devfn, __offset ) ({				\
+	unsigned int __address, __devicebit;						\
+	unsigned short __mapaddress;							\
+	unsigned int __dev = PCI_DEV (__devfn); /* FIXME to check!! (slot?) */		\
+											\
+	if (__bus == 0) {								\
+		/* local bus segment so need a type 0 config cycle */			\
+		/* build the PCI configuration "address" with one-hot in A31-A11 */	\
+		__address = PCI_CONFIG_BASE;						\
+		__address |= ((__devfn & 0x07) << 8);					\
+		__address |= __offset & 0xFF;						\
+		__mapaddress = 0x000A;	/* 101=>config cycle, 0=>A1=A0=0 */		\
+		__devicebit = (1 << (__dev + 11));					\
+											\
+		if ((__devicebit & 0xFF000000) != 0) {					\
+			/* high order bits are handled by the MAP register */		\
+			__mapaddress |= (__devicebit >> 16);				\
+		} else {								\
+			/* low order bits handled directly in the address */		\
+			__address |= __devicebit;					\
+		}									\
+	} else {		/* bus !=0 */						\
+		/* not the local bus segment so need a type 1 config cycle */		\
+		/* A31-A24 are don't care (so clear to 0) */				\
+		__mapaddress = 0x000B;	/* 101=>config cycle, 1=>A1&A0 from PCI_CFG */	\
+		__address = PCI_CONFIG_BASE;						\
+		__address |= ((__bus & 0xFF) << 16);	/* bits 23..16 = bus number	*/  \
+		__address |= ((__dev & 0x1F) << 11);	/* bits 15..11 = device number	*/  \
+		__address |= ((__devfn & 0x07) << 8);	/* bits 10..8  = function number */ \
+		__address |= __offset & 0xFF;	/* bits	 7..0  = register number */	\
+	}										\
+	_V3Write16 (V3_LB_MAP1, __mapaddress);						\
+	__address;									\
+})
+
+/* _V3OpenConfigWindow - open V3 configuration window */
+#define _V3OpenConfigWindow() {								\
+	/* Set up base0 to see all 512Mbytes of memory space (not	     */		\
+	/* prefetchable), this frees up base1 for re-use by configuration*/		\
+	/* memory */									\
+											\
+	_V3Write32 (V3_LB_BASE0, ((INTEGRATOR_PCI_BASE & 0xFFF00000) |			\
+				     0x90 | V3_LB_BASE_M_ENABLE));			\
+	/* Set up base1 to point into configuration space, note that MAP1 */		\
+	/* register is set up by pciMakeConfigAddress(). */				\
+											\
+	_V3Write32 (V3_LB_BASE1, ((CPU_PCI_CNFG_ADRS & 0xFFF00000) |			\
+				     0x40 | V3_LB_BASE_M_ENABLE));			\
+}
+
+/* _V3CloseConfigWindow - close V3 configuration window */
+#define _V3CloseConfigWindow() {							\
+    /* Reassign base1 for use by prefetchable PCI memory */				\
+	_V3Write32 (V3_LB_BASE1, (((INTEGRATOR_PCI_BASE + 0x10000000) & 0xFFF00000)	\
+					| 0x84 | V3_LB_BASE_M_ENABLE));			\
+	_V3Write16 (V3_LB_MAP1,								\
+	    (((INTEGRATOR_PCI_BASE + 0x10000000) & 0xFFF00000) >> 16) | 0x0006);	\
+											\
+	/* And shrink base0 back to a 256M window (NOTE: MAP0 already correct) */	\
+											\
+	_V3Write32 (V3_LB_BASE0, ((INTEGRATOR_PCI_BASE & 0xFFF00000) |			\
+			     0x80 | V3_LB_BASE_M_ENABLE));				\
+}
+
+static int pci_integrator_read_byte (struct pci_controller *hose, pci_dev_t dev,
+				     int offset, unsigned char *val)
+{
+	_V3OpenConfigWindow ();
+	*val = *(volatile unsigned char *) PCI_CONFIG_ADDRESS (PCI_BUS (dev),
+							       PCI_FUNC (dev),
+							       offset);
+	_V3CloseConfigWindow ();
+
+	return 0;
+}
+
+static int pci_integrator_read__word (struct pci_controller *hose,
+				      pci_dev_t dev, int offset,
+				      unsigned short *val)
+{
+	_V3OpenConfigWindow ();
+	*val = *(volatile unsigned short *) PCI_CONFIG_ADDRESS (PCI_BUS (dev),
+								PCI_FUNC (dev),
+								offset);
+	_V3CloseConfigWindow ();
+
+	return 0;
+}
+
+static int pci_integrator_read_dword (struct pci_controller *hose,
+				      pci_dev_t dev, int offset,
+				      unsigned int *val)
+{
+	_V3OpenConfigWindow ();
+	*val = *(volatile unsigned short *) PCI_CONFIG_ADDRESS (PCI_BUS (dev),
+								PCI_FUNC (dev),
+								offset);
+	*val |= (*(volatile unsigned int *)
+		 PCI_CONFIG_ADDRESS (PCI_BUS (dev), PCI_FUNC (dev),
+				     (offset + 2))) << 16;
+	_V3CloseConfigWindow ();
+
+	return 0;
+}
+
+static int pci_integrator_write_byte (struct pci_controller *hose,
+				      pci_dev_t dev, int offset,
+				      unsigned char val)
+{
+	_V3OpenConfigWindow ();
+	*(volatile unsigned char *) PCI_CONFIG_ADDRESS (PCI_BUS (dev),
+							PCI_FUNC (dev),
+							offset) = val;
+	_V3CloseConfigWindow ();
+
+	return 0;
+}
+
+static int pci_integrator_write_word (struct pci_controller *hose,
+				      pci_dev_t dev, int offset,
+				      unsigned short val)
+{
+	_V3OpenConfigWindow ();
+	*(volatile unsigned short *) PCI_CONFIG_ADDRESS (PCI_BUS (dev),
+							 PCI_FUNC (dev),
+							 offset) = val;
+	_V3CloseConfigWindow ();
+
+	return 0;
+}
+
+static int pci_integrator_write_dword (struct pci_controller *hose,
+				       pci_dev_t dev, int offset,
+				       unsigned int val)
+{
+	_V3OpenConfigWindow ();
+	*(volatile unsigned short *) PCI_CONFIG_ADDRESS (PCI_BUS (dev),
+							 PCI_FUNC (dev),
+							 offset) = (val & 0xFFFF);
+	*(volatile unsigned short *) PCI_CONFIG_ADDRESS (PCI_BUS (dev),
+							 PCI_FUNC (dev),
+							 (offset + 2)) = ((val >> 16) & 0xFFFF);
+	_V3CloseConfigWindow ();
+
+	return 0;
+}
+/******************************
+ * PCI initialisation
+ ******************************/
+
+struct pci_controller integrator_hose = {
+#ifndef CONFIG_PCI_PNP
+	config_table: pci_integrator_config_table,
+#endif
+};
+
+void pci_init_board (void)
+{
+	volatile int i, j;
+	struct pci_controller *hose = &integrator_hose;
+
+	/* setting this register will take the V3 out of reset */
+
+	*(volatile unsigned int *) (INTEGRATOR_SC_PCIENABLE) = 1;
+
+	/* wait a few usecs to settle the device and the PCI bus */
+
+	for (i = 0; i < 100; i++)
+		j = i + 1;
+
+	/* Now write the Base I/O Address Word to V3_BASE + 0x6C */
+
+	*(volatile unsigned short *) (V3_BASE + V3_LB_IO_BASE) =
+		(unsigned short) (V3_BASE >> 16);
+
+	do {
+		*(volatile unsigned char *) (V3_BASE + V3_MAIL_DATA) = 0xAA;
+		*(volatile unsigned char *) (V3_BASE + V3_MAIL_DATA + 4) =
+			0x55;
+	} while (*(volatile unsigned char *) (V3_BASE + V3_MAIL_DATA) != 0xAA
+		 || *(volatile unsigned char *) (V3_BASE + V3_MAIL_DATA +
+						 4) != 0x55);
+
+	/* Make sure that V3 register access is not locked, if it is, unlock it */
+
+	if ((*(volatile unsigned short *) (V3_BASE + V3_SYSTEM) &
+	     V3_SYSTEM_M_LOCK)
+	    == V3_SYSTEM_M_LOCK)
+		*(volatile unsigned short *) (V3_BASE + V3_SYSTEM) = 0xA05F;
+
+	/* Ensure that the slave accesses from PCI are disabled while we */
+	/* setup windows */
+
+	*(volatile unsigned short *) (V3_BASE + V3_PCI_CMD) &=
+		~(V3_COMMAND_M_MEM_EN | V3_COMMAND_M_IO_EN);
+
+	/* Clear RST_OUT to 0; keep the PCI bus in reset until we've finished */
+
+	*(volatile unsigned short *) (V3_BASE + V3_SYSTEM) &=
+		~V3_SYSTEM_M_RST_OUT;
+
+	/* Make all accesses from PCI space retry until we're ready for them */
+
+	*(volatile unsigned short *) (V3_BASE + V3_PCI_CFG) |=
+		V3_PCI_CFG_M_RETRY_EN;
+
+	/* Set up any V3 PCI Configuration Registers that we absolutely have to */
+	/* LB_CFG controls Local Bus protocol. */
+	/* Enable LocalBus byte strobes for READ accesses too. */
+	/* set bit 7 BE_IMODE and bit 6 BE_OMODE */
+
+	*(volatile unsigned short *) (V3_BASE + V3_LB_CFG) |= 0x0C0;
+
+	/* PCI_CMD controls overall PCI operation. */
+	/* Enable PCI bus master. */
+
+	*(volatile unsigned short *) (V3_BASE + V3_PCI_CMD) |= 0x04;
+
+	/* PCI_MAP0 controls where the PCI to CPU memory window is on Local Bus */
+
+	*(volatile unsigned int *) (V3_BASE + V3_PCI_MAP0) =
+		(INTEGRATOR_BOOT_ROM_BASE) | (V3_PCI_MAP_M_ADR_SIZE_512M |
+					      V3_PCI_MAP_M_REG_EN |
+					      V3_PCI_MAP_M_ENABLE);
+
+	/* PCI_BASE0 is the PCI address of the start of the window */
+
+	*(volatile unsigned int *) (V3_BASE + V3_PCI_BASE0) =
+		INTEGRATOR_BOOT_ROM_BASE;
+
+	/* PCI_MAP1 is LOCAL address of the start of the window */
+
+	*(volatile unsigned int *) (V3_BASE + V3_PCI_MAP1) =
+		(INTEGRATOR_HDR0_SDRAM_BASE) | (V3_PCI_MAP_M_ADR_SIZE_1024M |
+						V3_PCI_MAP_M_REG_EN |
+						V3_PCI_MAP_M_ENABLE);
+
+	/* PCI_BASE1 is the PCI address of the start of the window */
+
+	*(volatile unsigned int *) (V3_BASE + V3_PCI_BASE1) =
+		INTEGRATOR_HDR0_SDRAM_BASE;
+
+	/* Set up the windows from local bus memory into PCI configuration, */
+	/* I/O and Memory. */
+	/* PCI I/O, LB_BASE2 and LB_MAP2 are used exclusively for this. */
+
+	*(volatile unsigned short *) (V3_BASE + V3_LB_BASE2) =
+		((CPU_PCI_IO_ADRS >> 24) << 8) | V3_LB_BASE_M_ENABLE;
+	*(volatile unsigned short *) (V3_BASE + V3_LB_MAP2) = 0;
+
+	/* PCI Configuration, use LB_BASE1/LB_MAP1. */
+
+	/* PCI Memory use LB_BASE0/LB_MAP0 and LB_BASE1/LB_MAP1 */
+	/* Map first 256Mbytes as non-prefetchable via BASE0/MAP0 */
+	/* (INTEGRATOR_PCI_BASE == PCI_MEM_BASE) */
+
+	*(volatile unsigned int *) (V3_BASE + V3_LB_BASE0) =
+		INTEGRATOR_PCI_BASE | (0x80 | V3_LB_BASE_M_ENABLE);
+
+	*(volatile unsigned short *) (V3_BASE + V3_LB_MAP0) =
+		((INTEGRATOR_PCI_BASE >> 20) << 0x4) | 0x0006;
+
+	/* Map second 256 Mbytes as prefetchable via BASE1/MAP1 */
+
+	*(volatile unsigned int *) (V3_BASE + V3_LB_BASE1) =
+		INTEGRATOR_PCI_BASE | (0x84 | V3_LB_BASE_M_ENABLE);
+
+	*(volatile unsigned short *) (V3_BASE + V3_LB_MAP1) =
+		(((INTEGRATOR_PCI_BASE + 0x10000000) >> 20) << 4) | 0x0006;
+
+	/* Allow accesses to PCI Configuration space */
+	/* and set up A1, A0 for type 1 config cycles */
+
+	*(volatile unsigned short *) (V3_BASE + V3_PCI_CFG) =
+		((*(volatile unsigned short *) (V3_BASE + V3_PCI_CFG)) &
+		 ~(V3_PCI_CFG_M_RETRY_EN | V3_PCI_CFG_M_AD_LOW1)) |
+		V3_PCI_CFG_M_AD_LOW0;
+
+	/* now we can allow in PCI MEMORY accesses */
+
+	*(volatile unsigned short *) (V3_BASE + V3_PCI_CMD) =
+		(*(volatile unsigned short *) (V3_BASE + V3_PCI_CMD)) |
+		V3_COMMAND_M_MEM_EN;
+
+	/* Set RST_OUT to take the PCI bus is out of reset, PCI devices can */
+	/* initialise and lock the V3 system register so that no one else */
+	/* can play with it */
+
+	*(volatile unsigned short *) (V3_BASE + V3_SYSTEM) =
+		(*(volatile unsigned short *) (V3_BASE + V3_SYSTEM)) |
+		V3_SYSTEM_M_RST_OUT;
+
+	*(volatile unsigned short *) (V3_BASE + V3_SYSTEM) =
+		(*(volatile unsigned short *) (V3_BASE + V3_SYSTEM)) |
+		V3_SYSTEM_M_LOCK;
+
+	/*
+	 * Register the hose
+	 */
+	hose->first_busno = 0;
+	hose->last_busno = 0xff;
+
+	/* System memory space */
+	pci_set_region (hose->regions + 0,
+			0x00000000, 0x40000000, 0x01000000,
+			PCI_REGION_MEM | PCI_REGION_MEMORY);
+
+	/* PCI Memory - config space */
+	pci_set_region (hose->regions + 1,
+			0x00000000, 0x62000000, 0x01000000, PCI_REGION_MEM);
+
+	/* PCI V3 regs */
+	pci_set_region (hose->regions + 2,
+			0x00000000, 0x61000000, 0x00080000, PCI_REGION_MEM);
+
+	/* PCI I/O space */
+	pci_set_region (hose->regions + 3,
+			0x00000000, 0x60000000, 0x00010000, PCI_REGION_IO);
+
+	pci_set_ops (hose,
+		     pci_integrator_read_byte,
+		     pci_integrator_read__word,
+		     pci_integrator_read_dword,
+		     pci_integrator_write_byte,
+		     pci_integrator_write_word, pci_integrator_write_dword);
+
+	hose->region_count = 4;
+
+	pci_register_hose (hose);
+
+	pciauto_config_init (hose);
+	pciauto_config_device (hose, 0);
+
+	hose->last_busno = pci_hose_scan (hose);
+}
+#endif
+
+/******************************
+ Routine:
+ Description:
+******************************/
+void flash__init (void)
+{
+}
+/*************************************************************
+ Routine:ether__init
+ Description: take the Ethernet controller out of reset and wait
+			   for the EEPROM load to complete.
+*************************************************************/
+void ether__init (void)
+{
+}
+
+/******************************
+ Routine:
+ Description:
+******************************/
+int dram_init (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
+	gd->bd->bi_dram[0].size	 = PHYS_SDRAM_1_SIZE;
+
+#ifdef CONFIG_CM_SPD_DETECT
+	{
+extern void dram_query(void);
+	unsigned long cm_reg_sdram;
+	unsigned long sdram_shift;
+
+	dram_query();	/* Assembler accesses to CM registers */
+			/* Queries the SPD values	      */
+
+	/* Obtain the SDRAM size from the CM SDRAM register */
+
+	cm_reg_sdram = *(volatile ulong *)(CM_BASE + OS_SDRAM);
+	/*   Register	      SDRAM size
+	 *
+	 *   0xXXXXXXbbb000bb	 16 MB
+	 *   0xXXXXXXbbb001bb	 32 MB
+	 *   0xXXXXXXbbb010bb	 64 MB
+	 *   0xXXXXXXbbb011bb	128 MB
+	 *   0xXXXXXXbbb100bb	256 MB
+	 *
+	 */
+	sdram_shift		 = ((cm_reg_sdram & 0x0000001C)/4)%4;
+	gd->bd->bi_dram[0].size	 = 0x01000000 << sdram_shift;
+
+	}
+#endif /* CM_SPD_DETECT */
+
+	return 0;
+}
+
+/* The Integrator/AP timer1 is clocked at 24MHz
+ * can be divided by 16 or 256
+ * and is a 16-bit counter
+ */
+/* U-Boot expects a 32 bit timer running at CFG_HZ*/
+static ulong timestamp;		/* U-Boot ticks since startup	      */
+static ulong total_count = 0;	/* Total timer count		      */
+static ulong lastdec;		/* Timer reading at last call	      */
+static ulong div_clock	 = 256; /* Divisor applied to the timer clock */
+static ulong div_timer	 = 1;	/* Divisor to convert timer reading
+				 * change to U-Boot ticks
+				 */
+/* CFG_HZ = CFG_HZ_CLOCK/(div_clock * div_timer) */
+
+#define TIMER_LOAD_VAL 0x0000FFFFL
+#define READ_TIMER ((*(volatile ulong *)(CFG_TIMERBASE+4)) & 0x0000FFFFL)
+
+/* all function return values in U-Boot ticks i.e. (1/CFG_HZ) sec
+ *  - unless otherwise stated
+ */
+
+/* starts a counter
+ * - the Integrator/AP timer issues an interrupt
+ *   each time it reaches zero
+ */
+int interrupt_init (void)
+{
+	/* Load timer with initial value */
+	*(volatile ulong *)(CFG_TIMERBASE + 0) = TIMER_LOAD_VAL;
+	/* Set timer to be
+	 *	enabled		  1
+	 *	free-running	  0
+	 *	XX		 00
+	 *	divider 256	 10
+	 *	XX		 00
+	 */
+	*(volatile ulong *)(CFG_TIMERBASE + 8) = 0x00000088;
+	total_count = 0;
+	/* init the timestamp and lastdec value */
+	reset_timer_masked();
+
+	div_timer  = CFG_HZ_CLOCK / CFG_HZ;
+	div_timer /= div_clock;
+
+	return (0);
+}
+
+/*
+ * timer without interrupts
+ */
+void reset_timer (void)
+{
+	reset_timer_masked ();
+}
+
+ulong get_timer (ulong base_ticks)
+{
+	return get_timer_masked () - base_ticks;
+}
+
+void set_timer (ulong ticks)
+{
+	timestamp = ticks;
+	total_count = ticks * div_timer;
+	reset_timer_masked();
+}
+
+/* delay x useconds */
+void udelay (unsigned long usec)
+{
+	ulong tmo, tmp;
+
+	/* Convert to U-Boot ticks */
+	tmo  = usec * CFG_HZ;
+	tmo /= (1000000L);
+
+	tmp  = get_timer_masked();	/* get current timestamp */
+	tmo += tmp;			/* wake up timestamp	 */
+
+	while (get_timer_masked () < tmo) { /* loop till event */
+		/*NOP*/;
+	}
+}
+
+void reset_timer_masked (void)
+{
+	/* reset time */
+	lastdec	  = READ_TIMER; /* capture current decrementer value   */
+	timestamp = 0;		/* start "advancing" time stamp from 0 */
+}
+
+/* converts the timer reading to U-Boot ticks	       */
+/* the timestamp is the number of ticks since reset    */
+/* This routine does not detect wraps unless called regularly
+   ASSUMES a call at least every 16 seconds to detect every reload */
+ulong get_timer_masked (void)
+{
+	ulong now = READ_TIMER;		/* current count */
+
+	if (now > lastdec) {
+		/* Must have wrapped */
+		total_count += lastdec + TIMER_LOAD_VAL + 1 - now;
+	} else {
+		total_count += lastdec - now;
+	}
+	lastdec	  = now;
+	timestamp = total_count/div_timer;
+
+	return timestamp;
+}
+
+/* waits specified delay value and resets timestamp */
+void udelay_masked (unsigned long usec)
+{
+	udelay(usec);
+}
+
+/*
+ * This function is derived from PowerPC code (read timebase as long long).
+ * On ARM it just returns the timer value.
+ */
+unsigned long long get_ticks(void)
+{
+	return get_timer(0);
+}
+
+/*
+ * Return the timebase clock frequency
+ * i.e. how often the timer decrements
+ */
+ulong get_tbclk (void)
+{
+	return CFG_HZ_CLOCK/div_clock;
+}