| /* |
| * 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/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] */ |
| |
| 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 |
