2 * linux/arch/arm/mm/nommu.c
4 * ARM uCLinux supporting functions.
6 #include <linux/module.h>
8 #include <linux/pagemap.h>
9 #include <linux/bootmem.h>
12 #include <asm/cacheflush.h>
13 #include <asm/sections.h>
15 #include <asm/setup.h>
16 #include <asm/mach/arch.h>
21 * Reserve the various regions of node 0
23 void __init
reserve_node_zero(pg_data_t
*pgdat
)
26 * Register the kernel text and data with bootmem.
27 * Note that this can only be in node 0.
29 #ifdef CONFIG_XIP_KERNEL
30 reserve_bootmem_node(pgdat
, __pa(_data
), _end
- _data
,
33 reserve_bootmem_node(pgdat
, __pa(_stext
), _end
- _stext
,
38 * Register the exception vector page.
39 * some architectures which the DRAM is the exception vector to trap,
40 * alloc_page breaks with error, although it is not NULL, but "0."
42 reserve_bootmem_node(pgdat
, CONFIG_VECTORS_BASE
, PAGE_SIZE
,
47 * paging_init() sets up the page tables, initialises the zone memory
48 * maps, and sets up the zero page, bad page and bad page tables.
50 void __init
paging_init(struct machine_desc
*mdesc
)
56 * We don't need to do anything here for nommu machines.
58 void setup_mm_for_reboot(char mode
)
62 void flush_dcache_page(struct page
*page
)
64 __cpuc_flush_dcache_page(page_address(page
));
66 EXPORT_SYMBOL(flush_dcache_page
);
68 void __iomem
*__arm_ioremap_pfn(unsigned long pfn
, unsigned long offset
,
69 size_t size
, unsigned int mtype
)
71 if (pfn
>= (0x100000000ULL
>> PAGE_SHIFT
))
73 return (void __iomem
*) (offset
+ (pfn
<< PAGE_SHIFT
));
75 EXPORT_SYMBOL(__arm_ioremap_pfn
);
77 void __iomem
*__arm_ioremap(unsigned long phys_addr
, size_t size
,
80 return (void __iomem
*)phys_addr
;
82 EXPORT_SYMBOL(__arm_ioremap
);
84 void __iounmap(volatile void __iomem
*addr
)
87 EXPORT_SYMBOL(__iounmap
);