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1.1 root 1: /******************************************************************************
2: * Copyright (c) 2004, 2008 IBM Corporation
3: * All rights reserved.
4: * This program and the accompanying materials
5: * are made available under the terms of the BSD License
6: * which accompanies this distribution, and is available at
7: * http://www.opensource.org/licenses/bsd-license.php
8: *
9: * Contributors:
10: * IBM Corporation - initial implementation
11: *****************************************************************************/
12: #define _ASM_
13: #include "macros.h"
14: #include "southbridge.h"
15: #include "nvramlog.h"
16:
17: #define bootmsg_area_size 128
18:
19: .text
20: .align 3
21:
22: // Declare the warning level for all 128 possibilities of AC/pCKG kombinations
23: WRNG_LVL:
24: .rept bootmsg_area_size
25: .byte 0x0
26: .endr
27:
28:
29: //*****************************************************************************
30: // Check UserWarningLevel against SystemWarningLevel
31: // input : r3=cp-id, r5=level
32: // change: r6,r7
33: // output: CR0 ( compared user vs system level )
34: // example:
35: // bl GET_WRNG_LVL
36: // ble print_warning
37: // bgt do_not_print_warning
38: ENTRY(GET_WRNG_LVL)
39: mflr r7 // save linkage register
40: bl 0f // get current
41: 0: mflr r6 // Instruction Address
42: mtlr r7 // restore linkage register
43: addi r6,r6,WRNG_LVL-0b // calc addr of WRNG_LVL array
44: rldic r7,r3,56,57 // calc index into array
45: lbzux r7,r6,r7 // read the warning level
46: cmpw r5,r7 // and compare it
47: blr
48:
49: //*****************************************************************************
50: // Print CheckPoint
51: // input : r3=cp-id
52: // change: r3, r4, r5, r6, r7, r11
53: // output: none
54: ENTRY(bootmsg_cp)
55: mflr r11
56: mr r9, r3 // save checkpoint ID
57: li r3, 'C'
58: bl io_putchar // print character
59: mr r3, r9
60: bl io_printhex16 // print checkpoint ID
61: .rept 5
62: li r3,'\b'
63: bl io_putchar // print backspaces
64: .endr
65: mtlr r11
66: blr
67:
68: //*****************************************************************************
69: // Print a general BootMessage
70: // input : r3=cp-id, r4=string, r5=char (type C,W,E)
71: // change: r3,r4,r5,r6,r7,r9,r10,r11,r12
72: // output: none
73: ENTRY(print_msg)
74: mflr r11 // Save linkage register
75: mr r9, r3 // Save ID
76: mr r10, r4 // Save ptr to string
77: mr r12, r5 // Save type (char [CWE])
78: li r3, '\n' // make it a new line
79: bl io_putchar
80: li r3, '\r'
81: bl io_putchar
82: mr r3, r12 // restore type
83: bl io_putchar // print character
84: mr r3, r9 // restore ID
85: bl io_printhex16 // print checkpoint ID
86: li r3, ' ' // print a space
87: bl io_putchar
88: mr r3, r10 // restore ptr to string
89: bl io_print // print message
90: li r3, '\n' // add a new line
91: bl io_putchar
92: li r3, '\r'
93: bl io_putchar
94: mtlr r11 // restore linkage register
95: blr
96:
97: //*****************************************************************************
98: // Print an Error Boot Message
99: // input : r3=cp-id, r4=string-ptr
100: // change : r3,r4,r5,r6,r7,r9,r10,r11,r12
101: // output : none
102: ENTRY(bootmsg_error)
103: li r5, 'E' // E is for Error
104: b print_msg // and print this message
105:
106: //*****************************************************************************
107: // Print a Warning Boot Message
108: // input : r3=cp-id, r4=string-ptr, r5=level
109: // change : r3,r4,r5,r6,r7,r9,r10,r11,r12
110: // output : none
111: ENTRY(bootmsg_warning)
112: mflr r11 // save linkage register
113: bl GET_WRNG_LVL // check UserLevel against SystemLevel
114: mtlr r11 // restore linkage register
115: li r5, 'W' // 'W' is for Warning
116: ble print_msg // if UserLevel<=SystemLevel print and return
117: blr // else return
118:
119: //*****************************************************************************
120: // Print a Debug Checkpoint
121: // input : r3=cp-id, r4=string-ptr, r5=level
122: // change : r3,r4,r5,r6,r7,r9,r10,r11,r12
123: // output : none
124: // r3=cp-id, r4=string, r5=level
125: ENTRY(bootmsg_debugcp)
126: mflr r11 // save linkage register
127: addi r5,r5,0x20 // add checkpoint offset
128: bl GET_WRNG_LVL // check UserLevel against SystemLevel
129: mtlr r11 // restore linkage register
130: li r5, 'D' // 'D' is for Debug CheckPoint
131: ble print_msg // if UserLevel<=SystemLevel print and return
132: blr // else return
133:
134: //*****************************************************************************
135: // Check warning level
136: // input : r3=cp-id, r4=level
137: // change : r3,r4,r5,r6,r7,r9,r10,r11
138: // output : r3 (true, false)
139: // r3=cp-id, r4=level
140: ENTRY(bootmsg_checklevel)
141: mflr r11
142: mr r5, r4
143: slwi r3, r3, 8
144: bl GET_WRNG_LVL // check UserLevel against SystemLevel
145: li r3, 0 // return 0
146: bgt 0f // IF ( UserLevel < SystemLevel )
147: li r3, 1 // | return 1
148: 0: mtlr r11 // FI
149: blr
150:
151: // r3=area|pkg, r4=level
152: ENTRY(bootmsg_setlevel)
153: mflr r5
154: bl WarningMsg // calc current IA
155: WarningMsg:
156: mflr r6 // get current IA
157: addi r6,r6,WRNG_LVL-WarningMsg
158: andi. r3, r3, 0x7F
159: add r6,r3,r6 // address |
160: stb r4,0(r6) // store level |_ stwbrx r4,r3,r6
161: #ifndef DISABLE_NVRAM
162: LOAD64(r6, SB_NVRAM_FWONLY_adr + 8 )
163: add r6,r6,r3
164: stb r4,0(r6)
165: #endif
166: mtlr r5
167: blr
168:
169: ENTRY(bootmsg_nvupdate)
170: #ifndef DISABLE_NVRAM
171: mflr r10
172: LOAD64(r3, SB_NVRAM_FWONLY_adr)
173: lwz r4, 0(r3)
174: cmpwi r4, 0x424E // find bootmsg area header
175: bne 0f
176:
177: LOAD64(r5, bootmsg_area_size/8)
178: mtctr r5
179: bl WngMsg
180: WngMsg:
181: mflr r5
182: addi r5,r5,WRNG_LVL-WngMsg-8
183:
184: 1:
185: ldu r4, 8(r3)
186: stdu r4, 8(r5)
187: bdnz+ 1b
188: b 2f
189:
190: 0:
191: LOAD64(r5, bootmsg_area_size)
192: mtctr r5
193: li r4, 0x424E // clear bootmsg log area
194: stw r4, 0(r3)
195: li r4, 0
196:
197: 1: stdu r4, 8(r3)
198: bdnz+ 1b
199:
200: 2: // the end
201: mtlr r10
202: #endif
203: blr
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