lxdream 0.9.1| filename | test/lib/crt0.s |
| changeset | 976:e57a25d9eb7d |
| prev | 812:8cc61d5ea1f8 |
| author | nkeynes |
| date | Wed Nov 10 08:37:42 2010 +1000 (13 years ago) |
| permissions | -rw-r--r-- |
| last change | Add chain pointer to the xlat cache, so that we can maintain multiple blocks for the same address. This prevents thrashing in cases where we would other keep retranslating the same blocks over and over again due to varying xlat_sh4_mode values |
| view | annotate | diff | log | raw |
1 .section .text
2 .global start
3 .global ___exit
4 .global _atexit
5 start:
6 mov.l setup_cache_k,r0
7 mov.l p2_mask,r1
8 or r1,r0
9 jmp @r0
10 nop
11 setup_cache:
12 mov.l ccr_addr,r0
13 mov.w ccr_data,r1
14 mov.l r1,@r0
15 mov.l start_2_k,r0
16 nop
17 nop
18 nop
19 nop
20 nop
21 nop
22 nop
23 jmp @r0
24 nop
25 start_2:
26 mov.l old_stack_k,r14
27 mov.l r15,@r14
28 mov.l old_pr_k,r14
29 sts pr,r15
30 mov.l r15,@r14
31 mov.l stack_k,r15
33 ! zero out bss
34 mov.l edata_k,r0
35 mov.l end_k,r1
36 mov #0,r2
37 start_l:
38 mov.l r2,@r0
39 add #4,r0
40 cmp/ge r0,r1
41 bt start_l
43 #if defined (__SH3E__) || defined(__SH4_SINGLE__) || defined(__SH4__) || defined(__SH4_SINGLE_ONLY)
44 mov.l set_fpscr_k, r1
45 jsr @r1
46 mov #0,r4
47 lds r3,fpscr
48 #endif /* defined (__SH3E__) || defined(__SH4_SINGLE__) || defined(__SH4__) || defined(__SH4_SINGLE_ONLY__) */
50 mov.l sr_data, r1
51 ldc r1, sr
53 ! call the mainline
54 mov.l main_k,r0
55 jsr @r0
56 or r0,r0
58 ! call exit
59 mov r0,r4
60 mov.l exit_k,r0
61 jsr @r0
62 or r0,r0
64 ___exit:
65 mov.l old_pr_k,r14
66 mov.l @r14,r15
67 lds r15,pr
68 mov.l old_stack_k,r14
69 mov.l @r14,r15
70 rts
71 nop
73 _atexit:
74 rts
75 nop
77 .align 4
78 #if defined (__SH3E__) || defined(__SH4_SINGLE__) || defined(__SH4__) || defined(__SH4_SINGLE_ONLY__)
79 set_fpscr_k:
80 .long ___set_fpscr
81 #endif /* defined (__SH3E__) || defined(__SH4_SINGLE__) || defined(__SH4__) || defined(SH4_SINGLE_ONLY) */
82 stack_k:
83 .long _stack
84 edata_k:
85 .long _edata
86 end_k:
87 .long _end
88 main_k:
89 .long _main
90 exit_k:
91 .long _exit
93 old_stack_k:
94 .long _old_stack
95 old_pr_k:
96 .long _old_pr
98 _old_stack:
99 .long 0
100 _old_pr:
101 .long 0
103 setup_cache_k:
104 .long setup_cache
105 start_2_k:
106 .long start_2
107 p2_mask:
108 .long 0xa0000000
109 sr_data:
110 .long 0x400000f0
111 ccr_addr:
112 .long 0xff00001c
113 ccr_data:
114 .word 0x090b
116 .align 4
118 #ifdef __ELF__
119 .section .stack,"aw"
120 #else
121 .section .stack
122 #endif
123 ! _stack: .long 0xdeaddead
.