diff options
-rw-r--r-- | arch/m68knommu/platform/5307/head.S | 82 |
1 files changed, 10 insertions, 72 deletions
diff --git a/arch/m68knommu/platform/5307/head.S b/arch/m68knommu/platform/5307/head.S index c30c462b99b1..1d9eb301d7ac 100644 --- a/arch/m68knommu/platform/5307/head.S +++ b/arch/m68knommu/platform/5307/head.S | |||
@@ -3,7 +3,7 @@ | |||
3 | /* | 3 | /* |
4 | * head.S -- common startup code for ColdFire CPUs. | 4 | * head.S -- common startup code for ColdFire CPUs. |
5 | * | 5 | * |
6 | * (C) Copyright 1999-2004, Greg Ungerer (gerg@snapgear.com). | 6 | * (C) Copyright 1999-2006, Greg Ungerer <gerg@snapgear.com>. |
7 | */ | 7 | */ |
8 | 8 | ||
9 | /*****************************************************************************/ | 9 | /*****************************************************************************/ |
@@ -19,47 +19,15 @@ | |||
19 | /*****************************************************************************/ | 19 | /*****************************************************************************/ |
20 | 20 | ||
21 | /* | 21 | /* |
22 | * Define fixed memory sizes. Configuration of a fixed memory size | 22 | * If we don't have a fixed memory size, then lets build in code |
23 | * overrides everything else. If the user defined a size we just | ||
24 | * blindly use it (they know what they are doing right :-) | ||
25 | */ | ||
26 | #if defined(CONFIG_RAM32MB) | ||
27 | #define MEM_SIZE 0x02000000 /* memory size 32Mb */ | ||
28 | #elif defined(CONFIG_RAM16MB) | ||
29 | #define MEM_SIZE 0x01000000 /* memory size 16Mb */ | ||
30 | #elif defined(CONFIG_RAM8MB) | ||
31 | #define MEM_SIZE 0x00800000 /* memory size 8Mb */ | ||
32 | #elif defined(CONFIG_RAM4MB) | ||
33 | #define MEM_SIZE 0x00400000 /* memory size 4Mb */ | ||
34 | #elif defined(CONFIG_RAM1MB) | ||
35 | #define MEM_SIZE 0x00100000 /* memory size 1Mb */ | ||
36 | #endif | ||
37 | |||
38 | /* | ||
39 | * Memory size exceptions for special cases. Some boards may be set | ||
40 | * for auto memory sizing, but we can't do it that way for some reason. | ||
41 | * For example the 5206eLITE board has static RAM, and auto-detecting | ||
42 | * the SDRAM will do you no good at all. Same goes for the MOD5272. | ||
43 | */ | ||
44 | #ifdef CONFIG_RAMAUTO | ||
45 | #if defined(CONFIG_M5206eLITE) | ||
46 | #define MEM_SIZE 0x00100000 /* 1MiB default memory */ | ||
47 | #endif | ||
48 | #if defined(CONFIG_MOD5272) | ||
49 | #define MEM_SIZE 0x00800000 /* 8MiB default memory */ | ||
50 | #endif | ||
51 | #endif /* CONFIG_RAMAUTO */ | ||
52 | |||
53 | |||
54 | /* | ||
55 | * If we don't have a fixed memory size now, then lets build in code | ||
56 | * to auto detect the DRAM size. Obviously this is the prefered | 23 | * to auto detect the DRAM size. Obviously this is the prefered |
57 | * method, and should work for most boards (it won't work for those | 24 | * method, and should work for most boards. It won't work for those |
58 | * that do not have their RAM starting at address 0). | 25 | * that do not have their RAM starting at address 0, and it only |
26 | * works on SDRAM (not boards fitted with SRAM). | ||
59 | */ | 27 | */ |
60 | #if defined(MEM_SIZE) | 28 | #if CONFIG_RAMSIZE != 0 |
61 | .macro GET_MEM_SIZE | 29 | .macro GET_MEM_SIZE |
62 | movel #MEM_SIZE,%d0 /* hard coded memory size */ | 30 | movel #CONFIG_RAMSIZE,%d0 /* hard coded memory size */ |
63 | .endm | 31 | .endm |
64 | 32 | ||
65 | #elif defined(CONFIG_M5206) || defined(CONFIG_M5206e) || \ | 33 | #elif defined(CONFIG_M5206) || defined(CONFIG_M5206e) || \ |
@@ -98,37 +66,7 @@ | |||
98 | .endm | 66 | .endm |
99 | 67 | ||
100 | #else | 68 | #else |
101 | #error "ERROR: I don't know how to determine your boards memory size?" | 69 | #error "ERROR: I don't know how to probe your boards memory size?" |
102 | #endif | ||
103 | |||
104 | |||
105 | /* | ||
106 | * Most ColdFire boards have their DRAM starting at address 0. | ||
107 | * Notable exception is the 5206eLITE board, another is the MOD5272. | ||
108 | */ | ||
109 | #if defined(CONFIG_M5206eLITE) | ||
110 | #define MEM_BASE 0x30000000 | ||
111 | #endif | ||
112 | #if defined(CONFIG_MOD5272) | ||
113 | #define MEM_BASE 0x02000000 | ||
114 | #define VBR_BASE 0x20000000 /* vectors in SRAM */ | ||
115 | #endif | ||
116 | #if defined(CONFIG_M5208EVB) | ||
117 | #define MEM_BASE 0x40000000 | ||
118 | #endif | ||
119 | |||
120 | #ifndef MEM_BASE | ||
121 | #define MEM_BASE 0x00000000 /* memory base at address 0 */ | ||
122 | #endif | ||
123 | |||
124 | /* | ||
125 | * The default location for the vectors is at the base of RAM. | ||
126 | * Some boards might like to use internal SRAM or something like | ||
127 | * that. If no board specific header defines an alternative then | ||
128 | * use the base of RAM. | ||
129 | */ | ||
130 | #ifndef VBR_BASE | ||
131 | #define VBR_BASE MEM_BASE /* vector address */ | ||
132 | #endif | 70 | #endif |
133 | 71 | ||
134 | /*****************************************************************************/ | 72 | /*****************************************************************************/ |
@@ -191,11 +129,11 @@ _start: | |||
191 | * Create basic memory configuration. Set VBR accordingly, | 129 | * Create basic memory configuration. Set VBR accordingly, |
192 | * and size memory. | 130 | * and size memory. |
193 | */ | 131 | */ |
194 | movel #VBR_BASE,%a7 | 132 | movel #CONFIG_VECTORBASE,%a7 |
195 | movec %a7,%VBR /* set vectors addr */ | 133 | movec %a7,%VBR /* set vectors addr */ |
196 | movel %a7,_ramvec | 134 | movel %a7,_ramvec |
197 | 135 | ||
198 | movel #MEM_BASE,%a7 /* mark the base of RAM */ | 136 | movel #CONFIG_RAMBASE,%a7 /* mark the base of RAM */ |
199 | movel %a7,_rambase | 137 | movel %a7,_rambase |
200 | 138 | ||
201 | GET_MEM_SIZE /* macro code determines size */ | 139 | GET_MEM_SIZE /* macro code determines size */ |