Commit | Line | Data |
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1da177e4 | 1 | /* |
c1dcb14e SS |
2 | * Copyright 2000, 2007-2008 MontaVista Software Inc. |
3 | * Author: MontaVista Software, Inc. <source@mvista.com | |
1da177e4 LT |
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 | */ | |
ce28f94c | 27 | |
1da177e4 | 28 | #include <linux/init.h> |
1da177e4 | 29 | #include <linux/ioport.h> |
a7bcb1ae | 30 | #include <linux/jiffies.h> |
efe29c0f | 31 | #include <linux/module.h> |
1da177e4 | 32 | |
1da177e4 | 33 | #include <asm/mipsregs.h> |
1da177e4 LT |
34 | #include <asm/time.h> |
35 | ||
25b31cb1 | 36 | #include <au1000.h> |
25b31cb1 | 37 | |
1da177e4 | 38 | extern void __init board_setup(void); |
1da177e4 LT |
39 | extern void set_cpuspec(void); |
40 | ||
2925aba4 | 41 | void __init plat_mem_setup(void) |
1da177e4 | 42 | { |
2699cdfb ML |
43 | unsigned long est_freq; |
44 | ||
45 | /* determine core clock */ | |
46 | est_freq = au1xxx_calc_clock(); | |
47 | est_freq += 5000; /* round */ | |
48 | est_freq -= est_freq % 10000; | |
49 | printk(KERN_INFO "(PRId %08x) @ %lu.%02lu MHz\n", read_c0_prid(), | |
50 | est_freq / 1000000, ((est_freq % 1000000) * 100) / 1000000); | |
51 | ||
a7bcb1ae ML |
52 | /* this is faster than wasting cycles trying to approximate it */ |
53 | preset_lpj = (est_freq >> 1) / HZ; | |
54 | ||
074cf656 | 55 | if (au1xxx_cpu_needs_config_od()) |
c1dcb14e SS |
56 | /* Various early Au1xx0 errata corrected by this */ |
57 | set_c0_config(1 << 19); /* Set Config[OD] */ | |
58 | else | |
1da177e4 | 59 | /* Clear to obtain best system bus performance */ |
c1dcb14e | 60 | clear_c0_config(1 << 19); /* Clear Config[OD] */ |
1da177e4 | 61 | |
70342287 | 62 | board_setup(); /* board specific setup */ |
05911280 | 63 | |
1da177e4 LT |
64 | /* IO/MEM resources. */ |
65 | set_io_port_base(0); | |
66 | ioport_resource.start = IOPORT_RESOURCE_START; | |
67 | ioport_resource.end = IOPORT_RESOURCE_END; | |
68 | iomem_resource.start = IOMEM_RESOURCE_START; | |
69 | iomem_resource.end = IOMEM_RESOURCE_END; | |
1da177e4 LT |
70 | } |
71 | ||
11b897cf | 72 | #if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_PCI) |
1da177e4 | 73 | /* This routine should be valid for all Au1x based boards */ |
c3455b0e | 74 | phys_t __fixup_bigphys_addr(phys_t phys_addr, phys_t size) |
1da177e4 | 75 | { |
7517de34 ML |
76 | unsigned long start = ALCHEMY_PCI_MEMWIN_START; |
77 | unsigned long end = ALCHEMY_PCI_MEMWIN_END; | |
11b897cf | 78 | |
c1dcb14e | 79 | /* Don't fixup 36-bit addresses */ |
722b05a0 RB |
80 | if ((phys_addr >> 32) != 0) |
81 | return phys_addr; | |
1da177e4 | 82 | |
11b897cf ML |
83 | /* Check for PCI memory window */ |
84 | if (phys_addr >= start && (phys_addr + size - 1) <= end) | |
7517de34 | 85 | return (phys_t)(AU1500_PCI_MEM_PHYS_ADDR + phys_addr); |
1da177e4 LT |
86 | |
87 | /* default nop */ | |
88 | return phys_addr; | |
89 | } | |
efe29c0f | 90 | EXPORT_SYMBOL(__fixup_bigphys_addr); |
1da177e4 | 91 | #endif |