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/*
* Copyright 2000, 2007-2008 MontaVista Software Inc.
* Author: MontaVista Software, Inc. <source@mvista.com
*
* Updates to 2.6, Pete Popov, Embedded Alley Solutions, Inc.
*
* 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* 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.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/jiffies.h>
#include <linux/module.h>
#include <asm/dma-coherence.h>
#include <asm/mipsregs.h>
#include <asm/time.h>
#include <au1000.h>
extern void __init board_setup(void);
extern void set_cpuspec(void);
void __init plat_mem_setup(void)
{
unsigned long est_freq;
/* determine core clock */
est_freq = au1xxx_calc_clock();
est_freq += 5000; /* round */
est_freq -= est_freq % 10000;
printk(KERN_INFO "(PRId %08x) @ %lu.%02lu MHz\n", read_c0_prid(),
est_freq / 1000000, ((est_freq % 1000000) * 100) / 1000000);
/* this is faster than wasting cycles trying to approximate it */
preset_lpj = (est_freq >> 1) / HZ;
if (au1xxx_cpu_needs_config_od())
/* Various early Au1xx0 errata corrected by this */
set_c0_config(1 << 19); /* Set Config[OD] */
else
/* Clear to obtain best system bus performance */
clear_c0_config(1 << 19); /* Clear Config[OD] */
hw_coherentio = 0;
coherentio = 1;
switch (alchemy_get_cputype()) {
case ALCHEMY_CPU_AU1000:
case ALCHEMY_CPU_AU1500:
case ALCHEMY_CPU_AU1100:
coherentio = 0;
break;
case ALCHEMY_CPU_AU1200:
/* Au1200 AB USB does not support coherent memory */
if (0 == (read_c0_prid() & PRID_REV_MASK))
coherentio = 0;
break;
}
board_setup(); /* board specific setup */
/* IO/MEM resources. */
set_io_port_base(0);
ioport_resource.start = IOPORT_RESOURCE_START;
ioport_resource.end = IOPORT_RESOURCE_END;
iomem_resource.start = IOMEM_RESOURCE_START;
iomem_resource.end = IOMEM_RESOURCE_END;
}
#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_PCI)
/* This routine should be valid for all Au1x based boards */
phys_t __fixup_bigphys_addr(phys_t phys_addr, phys_t size)
{
unsigned long start = ALCHEMY_PCI_MEMWIN_START;
unsigned long end = ALCHEMY_PCI_MEMWIN_END;
/* Don't fixup 36-bit addresses */
if ((phys_addr >> 32) != 0)
return phys_addr;
/* Check for PCI memory window */
if (phys_addr >= start && (phys_addr + size - 1) <= end)
return (phys_t)(AU1500_PCI_MEM_PHYS_ADDR + phys_addr);
/* default nop */
return phys_addr;
}
EXPORT_SYMBOL(__fixup_bigphys_addr);
#endif
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