1 /* 2 * Copyright 2000, 2007-2008 MontaVista Software Inc. 3 * Author: MontaVista Software, Inc. <source@mvista.com 4 * 5 * Updates to 2.6, Pete Popov, Embedded Alley Solutions, Inc. 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the 9 * Free Software Foundation; either version 2 of the License, or (at your 10 * option) any later version. 11 * 12 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 13 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 14 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 15 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 16 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 17 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 18 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 19 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 20 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 21 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 22 * 23 * You should have received a copy of the GNU General Public License along 24 * with this program; if not, write to the Free Software Foundation, Inc., 25 * 675 Mass Ave, Cambridge, MA 02139, USA. 26 */ 27 28 #include <linux/init.h> 29 #include <linux/ioport.h> 30 31 #include <asm/dma-coherence.h> 32 #include <asm/mipsregs.h> 33 34 #include <au1000.h> 35 36 extern void __init board_setup(void); 37 extern void __init alchemy_set_lpj(void); 38 39 void __init plat_mem_setup(void) 40 { 41 alchemy_set_lpj(); 42 43 if (au1xxx_cpu_needs_config_od()) 44 /* Various early Au1xx0 errata corrected by this */ 45 set_c0_config(1 << 19); /* Set Config[OD] */ 46 else 47 /* Clear to obtain best system bus performance */ 48 clear_c0_config(1 << 19); /* Clear Config[OD] */ 49 50 hw_coherentio = 0; 51 coherentio = 1; 52 switch (alchemy_get_cputype()) { 53 case ALCHEMY_CPU_AU1000: 54 case ALCHEMY_CPU_AU1500: 55 case ALCHEMY_CPU_AU1100: 56 coherentio = 0; 57 break; 58 case ALCHEMY_CPU_AU1200: 59 /* Au1200 AB USB does not support coherent memory */ 60 if (0 == (read_c0_prid() & PRID_REV_MASK)) 61 coherentio = 0; 62 break; 63 } 64 65 board_setup(); /* board specific setup */ 66 67 /* IO/MEM resources. */ 68 set_io_port_base(0); 69 ioport_resource.start = IOPORT_RESOURCE_START; 70 ioport_resource.end = IOPORT_RESOURCE_END; 71 iomem_resource.start = IOMEM_RESOURCE_START; 72 iomem_resource.end = IOMEM_RESOURCE_END; 73 } 74 75 #if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_PCI) 76 /* This routine should be valid for all Au1x based boards */ 77 phys_addr_t __fixup_bigphys_addr(phys_addr_t phys_addr, phys_addr_t size) 78 { 79 unsigned long start = ALCHEMY_PCI_MEMWIN_START; 80 unsigned long end = ALCHEMY_PCI_MEMWIN_END; 81 82 /* Don't fixup 36-bit addresses */ 83 if ((phys_addr >> 32) != 0) 84 return phys_addr; 85 86 /* Check for PCI memory window */ 87 if (phys_addr >= start && (phys_addr + size - 1) <= end) 88 return (phys_addr_t)(AU1500_PCI_MEM_PHYS_ADDR + phys_addr); 89 90 /* default nop */ 91 return phys_addr; 92 } 93 EXPORT_SYMBOL(__fixup_bigphys_addr); 94 #endif 95