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10#include <linux/init.h>
11#include <linux/highmem.h>
12
13static void feroceon_copy_user_page(void *kto, const void *kfrom)
14{
15 int tmp;
16
17 asm volatile ("\
181: ldmia %1!, {r2 - r7, ip, lr} \n\
19 pld [%1, #0] \n\
20 pld [%1, #32] \n\
21 pld [%1, #64] \n\
22 pld [%1, #96] \n\
23 pld [%1, #128] \n\
24 pld [%1, #160] \n\
25 pld [%1, #192] \n\
26 stmia %0, {r2 - r7, ip, lr} \n\
27 ldmia %1!, {r2 - r7, ip, lr} \n\
28 mcr p15, 0, %0, c7, c14, 1 @ clean and invalidate D line\n\
29 add %0, %0, #32 \n\
30 stmia %0, {r2 - r7, ip, lr} \n\
31 ldmia %1!, {r2 - r7, ip, lr} \n\
32 mcr p15, 0, %0, c7, c14, 1 @ clean and invalidate D line\n\
33 add %0, %0, #32 \n\
34 stmia %0, {r2 - r7, ip, lr} \n\
35 ldmia %1!, {r2 - r7, ip, lr} \n\
36 mcr p15, 0, %0, c7, c14, 1 @ clean and invalidate D line\n\
37 add %0, %0, #32 \n\
38 stmia %0, {r2 - r7, ip, lr} \n\
39 ldmia %1!, {r2 - r7, ip, lr} \n\
40 mcr p15, 0, %0, c7, c14, 1 @ clean and invalidate D line\n\
41 add %0, %0, #32 \n\
42 stmia %0, {r2 - r7, ip, lr} \n\
43 ldmia %1!, {r2 - r7, ip, lr} \n\
44 mcr p15, 0, %0, c7, c14, 1 @ clean and invalidate D line\n\
45 add %0, %0, #32 \n\
46 stmia %0, {r2 - r7, ip, lr} \n\
47 ldmia %1!, {r2 - r7, ip, lr} \n\
48 mcr p15, 0, %0, c7, c14, 1 @ clean and invalidate D line\n\
49 add %0, %0, #32 \n\
50 stmia %0, {r2 - r7, ip, lr} \n\
51 ldmia %1!, {r2 - r7, ip, lr} \n\
52 mcr p15, 0, %0, c7, c14, 1 @ clean and invalidate D line\n\
53 add %0, %0, #32 \n\
54 stmia %0, {r2 - r7, ip, lr} \n\
55 subs %2, %2, #(32 * 8) \n\
56 mcr p15, 0, %0, c7, c14, 1 @ clean and invalidate D line\n\
57 add %0, %0, #32 \n\
58 bne 1b \n\
59 mcr p15, 0, %2, c7, c10, 4 @ drain WB"
60 : "+&r" (kto), "+&r" (kfrom), "=&r" (tmp)
61 : "2" (PAGE_SIZE)
62 : "r2", "r3", "r4", "r5", "r6", "r7", "ip", "lr");
63}
64
65void feroceon_copy_user_highpage(struct page *to, struct page *from,
66 unsigned long vaddr, struct vm_area_struct *vma)
67{
68 void *kto, *kfrom;
69
70 kto = kmap_atomic(to);
71 kfrom = kmap_atomic(from);
72 flush_cache_page(vma, vaddr, page_to_pfn(from));
73 feroceon_copy_user_page(kto, kfrom);
74 kunmap_atomic(kfrom);
75 kunmap_atomic(kto);
76}
77
78void feroceon_clear_user_highpage(struct page *page, unsigned long vaddr)
79{
80 void *ptr, *kaddr = kmap_atomic(page);
81 asm volatile ("\
82 mov r1, %2 \n\
83 mov r2, #0 \n\
84 mov r3, #0 \n\
85 mov r4, #0 \n\
86 mov r5, #0 \n\
87 mov r6, #0 \n\
88 mov r7, #0 \n\
89 mov ip, #0 \n\
90 mov lr, #0 \n\
911: stmia %0, {r2-r7, ip, lr} \n\
92 subs r1, r1, #1 \n\
93 mcr p15, 0, %0, c7, c14, 1 @ clean and invalidate D line\n\
94 add %0, %0, #32 \n\
95 bne 1b \n\
96 mcr p15, 0, r1, c7, c10, 4 @ drain WB"
97 : "=r" (ptr)
98 : "0" (kaddr), "I" (PAGE_SIZE / 32)
99 : "r1", "r2", "r3", "r4", "r5", "r6", "r7", "ip", "lr");
100 kunmap_atomic(kaddr);
101}
102
103struct cpu_user_fns feroceon_user_fns __initdata = {
104 .cpu_clear_user_highpage = feroceon_clear_user_highpage,
105 .cpu_copy_user_highpage = feroceon_copy_user_highpage,
106};
107
108
