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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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11b897cf84
On Alchemy the PCMCIA area lies at the end of the chips 36bit system bus area. Currently, addresses at the far end of the 32bit area are assumed to belong to the PCMCIA area and fixed up to the real 36bit address before being passed to ioremap(). A previous commit enabled 64 bit physical size for the resource datatype on Alchemy and this allows to use the correct 36bit addresses when registering the PCMCIA sockets. This patch removes the 32-to-36bit address fixup and registers the Alchemy demo board pcmcia socket with the correct 36bit physical addresses. Tested on DB1200, with a CF card (ide-cs driver) and a 3c589 PCMCIA ethernet card. Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com> To: Linux-MIPS <linux-mips@linux-mips.org> Cc: Manuel Lauss <manuel.lauss@gmail.com> Patchwork: http://patchwork.linux-mips.org/patch/994/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
92 lines
3.1 KiB
C
92 lines
3.1 KiB
C
/*
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* Copyright 2000, 2007-2008 MontaVista Software Inc.
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* Author: MontaVista Software, Inc. <source@mvista.com
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*
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* Updates to 2.6, Pete Popov, Embedded Alley Solutions, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/jiffies.h>
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#include <linux/module.h>
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#include <asm/mipsregs.h>
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#include <asm/time.h>
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#include <au1000.h>
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extern void __init board_setup(void);
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extern void set_cpuspec(void);
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void __init plat_mem_setup(void)
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{
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unsigned long est_freq;
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/* determine core clock */
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est_freq = au1xxx_calc_clock();
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est_freq += 5000; /* round */
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est_freq -= est_freq % 10000;
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printk(KERN_INFO "(PRId %08x) @ %lu.%02lu MHz\n", read_c0_prid(),
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est_freq / 1000000, ((est_freq % 1000000) * 100) / 1000000);
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/* this is faster than wasting cycles trying to approximate it */
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preset_lpj = (est_freq >> 1) / HZ;
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board_setup(); /* board specific setup */
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if (au1xxx_cpu_needs_config_od())
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/* Various early Au1xx0 errata corrected by this */
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set_c0_config(1 << 19); /* Set Config[OD] */
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else
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/* Clear to obtain best system bus performance */
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clear_c0_config(1 << 19); /* Clear Config[OD] */
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/* IO/MEM resources. */
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set_io_port_base(0);
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ioport_resource.start = IOPORT_RESOURCE_START;
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ioport_resource.end = IOPORT_RESOURCE_END;
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iomem_resource.start = IOMEM_RESOURCE_START;
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iomem_resource.end = IOMEM_RESOURCE_END;
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}
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#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_PCI)
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/* This routine should be valid for all Au1x based boards */
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phys_t __fixup_bigphys_addr(phys_t phys_addr, phys_t size)
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{
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u32 start = (u32)Au1500_PCI_MEM_START;
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u32 end = (u32)Au1500_PCI_MEM_END;
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/* Don't fixup 36-bit addresses */
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if ((phys_addr >> 32) != 0)
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return phys_addr;
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/* Check for PCI memory window */
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if (phys_addr >= start && (phys_addr + size - 1) <= end)
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return (phys_t)((phys_addr - start) + Au1500_PCI_MEM_START);
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/* default nop */
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return phys_addr;
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}
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EXPORT_SYMBOL(__fixup_bigphys_addr);
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#endif
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