Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / arch / arm / mach-iop13xx / io.c
1 /*
2  * iop13xx custom ioremap implementation
3  * Copyright (c) 2005-2006, Intel Corporation.
4  *
5  * This program is free software; you can redistribute it and/or modify it
6  * under the terms and conditions of the GNU General Public License,
7  * version 2, as published by the Free Software Foundation.
8  *
9  * This program is distributed in the hope it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
12  * more details.
13  *
14  * You should have received a copy of the GNU General Public License along with
15  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
16  * Place - Suite 330, Boston, MA 02111-1307 USA.
17  *
18  */
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/io.h>
22 #include <mach/hardware.h>
23
24 #include "pci.h"
25
26 static void __iomem *__iop13xx_ioremap_caller(phys_addr_t cookie,
27         size_t size, unsigned int mtype, void *caller)
28 {
29         void __iomem * retval;
30
31         switch (cookie) {
32         case IOP13XX_PCIX_LOWER_MEM_RA ... IOP13XX_PCIX_UPPER_MEM_RA:
33                 if (unlikely(!iop13xx_atux_mem_base))
34                         retval = NULL;
35                 else
36                         retval = (iop13xx_atux_mem_base +
37                                  (cookie - IOP13XX_PCIX_LOWER_MEM_RA));
38                 break;
39         case IOP13XX_PCIE_LOWER_MEM_RA ... IOP13XX_PCIE_UPPER_MEM_RA:
40                 if (unlikely(!iop13xx_atue_mem_base))
41                         retval = NULL;
42                 else
43                         retval = (iop13xx_atue_mem_base +
44                                  (cookie - IOP13XX_PCIE_LOWER_MEM_RA));
45                 break;
46         case IOP13XX_PBI_LOWER_MEM_RA ... IOP13XX_PBI_UPPER_MEM_RA:
47                 retval = __arm_ioremap_caller(IOP13XX_PBI_LOWER_MEM_PA +
48                                        (cookie - IOP13XX_PBI_LOWER_MEM_RA),
49                                        size, mtype, __builtin_return_address(0));
50                 break;
51         case IOP13XX_PMMR_PHYS_MEM_BASE ... IOP13XX_PMMR_UPPER_MEM_PA:
52                 retval = IOP13XX_PMMR_PHYS_TO_VIRT(cookie);
53                 break;
54         default:
55                 retval = __arm_ioremap_caller(cookie, size, mtype,
56                                 caller);
57         }
58
59         return retval;
60 }
61
62 static void __iop13xx_iounmap(volatile void __iomem *addr)
63 {
64         if (iop13xx_atue_mem_base)
65                 if (addr >= (void __iomem *) iop13xx_atue_mem_base &&
66                     addr < (void __iomem *) (iop13xx_atue_mem_base +
67                                              iop13xx_atue_mem_size))
68                     goto skip;
69
70         if (iop13xx_atux_mem_base)
71                 if (addr >= (void __iomem *) iop13xx_atux_mem_base &&
72                     addr < (void __iomem *) (iop13xx_atux_mem_base +
73                                              iop13xx_atux_mem_size))
74                     goto skip;
75
76         switch ((u32) addr) {
77         case (u32)IOP13XX_PMMR_VIRT_MEM_BASE ... (u32)IOP13XX_PMMR_UPPER_MEM_VA:
78                 goto skip;
79         }
80         __iounmap(addr);
81
82 skip:
83         return;
84 }
85
86 void __init iop13xx_init_early(void)
87 {
88         arch_ioremap_caller = __iop13xx_ioremap_caller;
89         arch_iounmap = __iop13xx_iounmap;
90 }