Commit | Line | Data |
---|---|---|
5924486d RK |
1 | /* |
2 | * linux/arch/arm/mm/nommu.c | |
3 | * | |
4 | * ARM uCLinux supporting functions. | |
5 | */ | |
6 | #include <linux/module.h> | |
e6b1b38c RK |
7 | #include <linux/mm.h> |
8 | #include <linux/pagemap.h> | |
fced80c7 | 9 | #include <linux/io.h> |
2778f620 | 10 | #include <linux/memblock.h> |
5924486d | 11 | |
e6b1b38c | 12 | #include <asm/cacheflush.h> |
37efe642 | 13 | #include <asm/sections.h> |
5924486d | 14 | #include <asm/page.h> |
b32f3afe | 15 | #include <asm/setup.h> |
3ff1559e | 16 | #include <asm/mach/arch.h> |
5924486d | 17 | |
d111e8f9 RK |
18 | #include "mm.h" |
19 | ||
2778f620 | 20 | void __init arm_mm_memblock_reserve(void) |
d111e8f9 | 21 | { |
d111e8f9 RK |
22 | /* |
23 | * Register the exception vector page. | |
24 | * some architectures which the DRAM is the exception vector to trap, | |
25 | * alloc_page breaks with error, although it is not NULL, but "0." | |
26 | */ | |
2778f620 | 27 | memblock_reserve(CONFIG_VECTORS_BASE, PAGE_SIZE); |
d111e8f9 RK |
28 | } |
29 | ||
0371d3f7 RK |
30 | void __init sanity_check_meminfo(void) |
31 | { | |
55a8173c NP |
32 | phys_addr_t end = bank_phys_end(&meminfo.bank[meminfo.nr_banks - 1]); |
33 | high_memory = __va(end - 1) + 1; | |
0371d3f7 RK |
34 | } |
35 | ||
d111e8f9 RK |
36 | /* |
37 | * paging_init() sets up the page tables, initialises the zone memory | |
38 | * maps, and sets up the zero page, bad page and bad page tables. | |
39 | */ | |
4b5f32ce | 40 | void __init paging_init(struct machine_desc *mdesc) |
d111e8f9 | 41 | { |
8d717a52 | 42 | bootmem_init(); |
d111e8f9 RK |
43 | } |
44 | ||
80878d6c RK |
45 | /* |
46 | * We don't need to do anything here for nommu machines. | |
47 | */ | |
5aafec15 | 48 | void setup_mm_for_reboot(void) |
80878d6c RK |
49 | { |
50 | } | |
51 | ||
e6b1b38c RK |
52 | void flush_dcache_page(struct page *page) |
53 | { | |
2c9b9c84 | 54 | __cpuc_flush_dcache_area(page_address(page), PAGE_SIZE); |
e6b1b38c | 55 | } |
3e361225 | 56 | EXPORT_SYMBOL(flush_dcache_page); |
e6b1b38c | 57 | |
b5a07faa CM |
58 | void copy_to_user_page(struct vm_area_struct *vma, struct page *page, |
59 | unsigned long uaddr, void *dst, const void *src, | |
60 | unsigned long len) | |
61 | { | |
62 | memcpy(dst, src, len); | |
63 | if (vma->vm_flags & VM_EXEC) | |
64 | __cpuc_coherent_user_range(uaddr, uaddr + len); | |
65 | } | |
66 | ||
3603ab2b RK |
67 | void __iomem *__arm_ioremap_pfn(unsigned long pfn, unsigned long offset, |
68 | size_t size, unsigned int mtype) | |
5924486d RK |
69 | { |
70 | if (pfn >= (0x100000000ULL >> PAGE_SHIFT)) | |
71 | return NULL; | |
72 | return (void __iomem *) (offset + (pfn << PAGE_SHIFT)); | |
73 | } | |
3603ab2b | 74 | EXPORT_SYMBOL(__arm_ioremap_pfn); |
5924486d | 75 | |
31aa8fd6 RK |
76 | void __iomem *__arm_ioremap_pfn_caller(unsigned long pfn, unsigned long offset, |
77 | size_t size, unsigned int mtype, void *caller) | |
78 | { | |
79 | return __arm_ioremap_pfn(pfn, offset, size, mtype); | |
80 | } | |
81 | ||
3603ab2b RK |
82 | void __iomem *__arm_ioremap(unsigned long phys_addr, size_t size, |
83 | unsigned int mtype) | |
5924486d RK |
84 | { |
85 | return (void __iomem *)phys_addr; | |
86 | } | |
3603ab2b | 87 | EXPORT_SYMBOL(__arm_ioremap); |
5924486d | 88 | |
8a2b6255 RH |
89 | void __iomem * (*arch_ioremap_caller)(unsigned long, size_t, unsigned int, void *); |
90 | ||
b1a9ceb2 CM |
91 | void __iomem *__arm_ioremap_caller(unsigned long phys_addr, size_t size, |
92 | unsigned int mtype, void *caller) | |
31aa8fd6 RK |
93 | { |
94 | return __arm_ioremap(phys_addr, size, mtype); | |
95 | } | |
96 | ||
8a2b6255 RH |
97 | void (*arch_iounmap)(volatile void __iomem *); |
98 | ||
99 | void __arm_iounmap(volatile void __iomem *addr) | |
5924486d RK |
100 | { |
101 | } | |
8a2b6255 | 102 | EXPORT_SYMBOL(__arm_iounmap); |