203 lines
5.9 KiB
ArmAsm
203 lines
5.9 KiB
ArmAsm
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/******************************************************************************
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* Copyright (c) 2004, 2008 IBM Corporation
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* All rights reserved.
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* This program and the accompanying materials
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* are made available under the terms of the BSD License
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* which accompanies this distribution, and is available at
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* http://www.opensource.org/licenses/bsd-license.php
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*
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* Contributors:
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* IBM Corporation - initial implementation
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*****************************************************************************/
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#define _ASM_
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#include "macros.h"
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#include "southbridge.h"
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#include "nvramlog.h"
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#define bootmsg_area_size 128
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.text
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.align 3
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// Declare the warning level for all 128 possibilities of AC/pCKG kombinations
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WRNG_LVL:
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.rept bootmsg_area_size
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.byte 0x0
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.endr
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//*****************************************************************************
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// Check UserWarningLevel against SystemWarningLevel
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// input : r3=cp-id, r5=level
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// change: r6,r7
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// output: CR0 ( compared user vs system level )
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// example:
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// bl GET_WRNG_LVL
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// ble print_warning
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// bgt do_not_print_warning
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ENTRY(GET_WRNG_LVL)
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mflr r7 // save linkage register
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bl 0f // get current
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0: mflr r6 // Instruction Address
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mtlr r7 // restore linkage register
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addi r6,r6,WRNG_LVL-0b // calc addr of WRNG_LVL array
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rldic r7,r3,56,57 // calc index into array
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lbzux r7,r6,r7 // read the warning level
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cmpw r5,r7 // and compare it
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blr
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//*****************************************************************************
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// Print CheckPoint
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// input : r3=cp-id
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// change: r3, r4, r5, r6, r7, r11
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// output: none
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ENTRY(bootmsg_cp)
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mflr r11
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mr r9, r3 // save checkpoint ID
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li r3, 'C'
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bl io_putchar // print character
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mr r3, r9
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bl io_printhex16 // print checkpoint ID
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li r3,'\r'
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bl io_putchar // go back
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mtlr r11
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blr
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//*****************************************************************************
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// Print a general BootMessage
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// input : r3=cp-id, r4=string, r5=char (type C,W,E)
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// change: r3,r4,r5,r6,r7,r9,r10,r11,r12
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// output: none
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ENTRY(print_msg)
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mflr r11 // Save linkage register
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mr r9, r3 // Save ID
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mr r10, r4 // Save ptr to string
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mr r12, r5 // Save type (char [CWE])
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li r3, '\n' // make it a new line
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bl io_putchar
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li r3, '\r'
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bl io_putchar
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mr r3, r12 // restore type
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bl io_putchar // print character
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mr r3, r9 // restore ID
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bl io_printhex16 // print checkpoint ID
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li r3, ' ' // print a space
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bl io_putchar
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mr r3, r10 // restore ptr to string
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bl io_print // print message
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li r3, '\n' // add a new line
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bl io_putchar
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li r3, '\r'
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bl io_putchar
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mtlr r11 // restore linkage register
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blr
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//*****************************************************************************
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// Print an Error Boot Message
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// input : r3=cp-id, r4=string-ptr
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// change : r3,r4,r5,r6,r7,r9,r10,r11,r12
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// output : none
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ENTRY(bootmsg_error)
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li r5, 'E' // E is for Error
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b print_msg // and print this message
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//*****************************************************************************
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// Print a Warning Boot Message
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// input : r3=cp-id, r4=string-ptr, r5=level
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// change : r3,r4,r5,r6,r7,r9,r10,r11,r12
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// output : none
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ENTRY(bootmsg_warning)
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mflr r11 // save linkage register
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bl GET_WRNG_LVL // check UserLevel against SystemLevel
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mtlr r11 // restore linkage register
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li r5, 'W' // 'W' is for Warning
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ble print_msg // if UserLevel<=SystemLevel print and return
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blr // else return
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//*****************************************************************************
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// Print a Debug Checkpoint
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// input : r3=cp-id, r4=string-ptr, r5=level
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// change : r3,r4,r5,r6,r7,r9,r10,r11,r12
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// output : none
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// r3=cp-id, r4=string, r5=level
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ENTRY(bootmsg_debugcp)
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mflr r11 // save linkage register
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addi r5,r5,0x20 // add checkpoint offset
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bl GET_WRNG_LVL // check UserLevel against SystemLevel
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mtlr r11 // restore linkage register
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li r5, 'D' // 'D' is for Debug CheckPoint
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ble print_msg // if UserLevel<=SystemLevel print and return
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blr // else return
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//*****************************************************************************
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// Check warning level
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// input : r3=cp-id, r4=level
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// change : r3,r4,r5,r6,r7,r9,r10,r11
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// output : r3 (true, false)
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// r3=cp-id, r4=level
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ENTRY(bootmsg_checklevel)
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mflr r11
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mr r5, r4
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slwi r3, r3, 8
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bl GET_WRNG_LVL // check UserLevel against SystemLevel
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li r3, 0 // return 0
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bgt 0f // IF ( UserLevel < SystemLevel )
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li r3, 1 // | return 1
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0: mtlr r11 // FI
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blr
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// r3=area|pkg, r4=level
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ENTRY(bootmsg_setlevel)
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mflr r5
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bl WarningMsg // calc current IA
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WarningMsg:
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mflr r6 // get current IA
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addi r6,r6,WRNG_LVL-WarningMsg
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andi. r3, r3, 0x7F
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add r6,r3,r6 // address |
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stb r4,0(r6) // store level |_ stwbrx r4,r3,r6
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#if !defined(DISABLE_NVRAM) && !defined(RTAS_NVRAM)
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LOAD64(r6, SB_NVRAM_FWONLY_adr + 8 )
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add r6,r6,r3
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stb r4,0(r6)
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#endif
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mtlr r5
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blr
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ENTRY(bootmsg_nvupdate)
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#if !defined(DISABLE_NVRAM) && !defined(RTAS_NVRAM)
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mflr r10
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LOAD64(r3, SB_NVRAM_FWONLY_adr)
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lwz r4, 0(r3)
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cmpwi r4, 0x424E // find bootmsg area header
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bne 0f
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LOAD64(r5, bootmsg_area_size/8)
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mtctr r5
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bl WngMsg
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WngMsg:
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mflr r5
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addi r5,r5,WRNG_LVL-WngMsg-8
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1:
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ldu r4, 8(r3)
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stdu r4, 8(r5)
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bdnz+ 1b
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b 2f
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0:
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LOAD64(r5, bootmsg_area_size)
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mtctr r5
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li r4, 0x424E // clear bootmsg log area
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stw r4, 0(r3)
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li r4, 0
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1: stdu r4, 8(r3)
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bdnz+ 1b
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2: // the end
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mtlr r10
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#endif
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blr
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