diff options
Diffstat (limited to 'arch/arm26/kernel/head.S')
-rw-r--r-- | arch/arm26/kernel/head.S | 112 |
1 files changed, 0 insertions, 112 deletions
diff --git a/arch/arm26/kernel/head.S b/arch/arm26/kernel/head.S deleted file mode 100644 index 93575e0e58fe..000000000000 --- a/arch/arm26/kernel/head.S +++ /dev/null | |||
@@ -1,112 +0,0 @@ | |||
1 | /* | ||
2 | * linux/arch/arm26/kernel/head.S | ||
3 | * | ||
4 | * Copyright (C) 1994-2000 Russell King | ||
5 | * Copyright (C) 2003 Ian Molton | ||
6 | * | ||
7 | * This program is free software; you can redistribute it and/or modify | ||
8 | * it under the terms of the GNU General Public License version 2 as | ||
9 | * published by the Free Software Foundation. | ||
10 | * | ||
11 | * 26-bit kernel startup code | ||
12 | */ | ||
13 | #include <linux/linkage.h> | ||
14 | #include <asm/mach-types.h> | ||
15 | |||
16 | .globl swapper_pg_dir | ||
17 | .equ swapper_pg_dir, 0x0207d000 | ||
18 | |||
19 | /* | ||
20 | * Entry point. | ||
21 | */ | ||
22 | .section ".init.text",#alloc,#execinstr | ||
23 | ENTRY(stext) | ||
24 | |||
25 | __entry: | ||
26 | cmp pc, #0x02000000 | ||
27 | ldrlt pc, LC0 @ if 0x01800000, call at 0x02080000 | ||
28 | teq r0, #0 @ Check for old calling method | ||
29 | blne oldparams @ Move page if old | ||
30 | |||
31 | adr r0, LC0 | ||
32 | ldmib r0, {r2-r5, sp} @ Setup stack (and fetch other values) | ||
33 | |||
34 | mov r0, #0 @ Clear BSS | ||
35 | 1: cmp r2, r3 | ||
36 | strcc r0, [r2], #4 | ||
37 | bcc 1b | ||
38 | |||
39 | bl detect_proc_type | ||
40 | str r0, [r4] | ||
41 | bl detect_arch_type | ||
42 | str r0, [r5] | ||
43 | |||
44 | #ifdef CONFIG_XIP_KERNEL | ||
45 | ldr r3, ETEXT @ data section copy | ||
46 | ldr r4, SDATA | ||
47 | ldr r5, EDATA | ||
48 | 1: | ||
49 | ldr r6, [r3], #4 | ||
50 | str r6, [r4], #4 | ||
51 | cmp r4, r5 | ||
52 | blt 1b | ||
53 | #endif | ||
54 | mov fp, #0 | ||
55 | b start_kernel | ||
56 | |||
57 | LC0: .word _stext | ||
58 | .word __bss_start @ r2 | ||
59 | .word _end @ r3 | ||
60 | .word processor_id @ r4 | ||
61 | .word __machine_arch_type @ r5 | ||
62 | .word init_thread_union+8192 @ sp | ||
63 | #ifdef CONFIG_XIP_KERNEL | ||
64 | ETEXT: .word _endtext | ||
65 | SDATA: .word _sdata | ||
66 | EDATA: .word __bss_start | ||
67 | #endif | ||
68 | |||
69 | arm2_id: .long 0x41560200 @ ARM2 and 250 dont have a CPUID | ||
70 | arm250_id: .long 0x41560250 @ So we create some after probing for them | ||
71 | .align | ||
72 | |||
73 | oldparams: mov r4, #0x02000000 | ||
74 | add r3, r4, #0x00080000 | ||
75 | add r4, r4, #0x0007c000 | ||
76 | 1: ldmia r0!, {r5 - r12} | ||
77 | stmia r4!, {r5 - r12} | ||
78 | cmp r4, r3 | ||
79 | blt 1b | ||
80 | mov pc, lr | ||
81 | |||
82 | /* | ||
83 | * We need some way to automatically detect the difference between | ||
84 | * these two machines. Unfortunately, it is not possible to detect | ||
85 | * the presence of the SuperIO chip, because that will hang the old | ||
86 | * Archimedes machines solid. | ||
87 | */ | ||
88 | /* DAG: Outdated, these have been combined !!!!!!! */ | ||
89 | detect_arch_type: | ||
90 | #if defined(CONFIG_ARCH_ARC) | ||
91 | mov r0, #MACH_TYPE_ARCHIMEDES | ||
92 | #elif defined(CONFIG_ARCH_A5K) | ||
93 | mov r0, #MACH_TYPE_A5K | ||
94 | #endif | ||
95 | mov pc, lr | ||
96 | |||
97 | detect_proc_type: | ||
98 | mov ip, lr | ||
99 | mov r2, #0xea000000 @ Point undef instr to continuation | ||
100 | adr r0, continue - 12 | ||
101 | orr r0, r2, r0, lsr #2 | ||
102 | mov r1, #0 | ||
103 | str r0, [r1, #4] | ||
104 | ldr r0, arm2_id | ||
105 | swp r2, r2, [r1] @ check for swp (ARM2 cant) | ||
106 | ldr r0, arm250_id | ||
107 | mrc 15, 0, r3, c0, c0 @ check for CP#15 (ARM250 cant) | ||
108 | mov r0, r3 | ||
109 | continue: mov r2, #0xeb000000 @ Make undef vector loop | ||
110 | sub r2, r2, #2 | ||
111 | str r2, [r1, #4] | ||
112 | mov pc, ip | ||