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https://github.com/ibm-s390-linux/s390-tools.git
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2fe5f27975
Use STAGE2_ENTRY and PSW_LOAD instead of hard-coded values. While at it, also move the libc.h to the top in tape2dump.c. Reviewed-by: Philipp Rudo <prudo@linux.ibm.com> Reviewed-by: Stefan Haberland <sth@linux.ibm.com> Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
52 lines
1.7 KiB
ArmAsm
52 lines
1.7 KiB
ArmAsm
#
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# IPL stage 0 and 1 loader for FBA
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#
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# Copyright IBM Corp. 2001, 2017
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#
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# s390-tools is free software; you can redistribute it and/or modify
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# it under the terms of the MIT license. See LICENSE for details.
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#
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# Startup for IPL at address 0
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# Second stage boot loader is loaded to 0x2000 and starts at 0x2018
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#
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# The first 24 bytes are loaded by IPL to addresses 0-23 (PSW and two CCWs).
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# The CCWs on 8-23 are used as a continuation of the implicit IPL channel
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# program.
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# The 1st CCW reads block 0 again with READ IPL
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# The 2nd CCW tics to the re-loaded stage 1 IPL record.
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#
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#include "boot/loaders_layout.h"
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#include "boot/s390.h"
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.org 0x0
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.globl _start
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_start:
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.quad PSW_LOAD+STAGE2_ENTRY # The first 24 byte are loaded
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.long 0x02000000,0x60000000+.Lend # by ipl to addresses 0-23.
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.long 0x08000000+.Ltic,0x40000000 # Tic to continuation
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#
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# Here starts stage 1
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#
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.Ltic: .long 0x43000000+.Llo0,0x40000008 # locate record 0
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.long 0x42000000,0x60000200 # bytes 0-512 of stage 1 ext
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.long 0x43000000+.Llo1,0x40000008 # locate record 1
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.long 0x42000000,0x60000200 # bytes 512-1024 of stage 1 ext
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.long 0x08000000,0x00000000 # tic to stage 1b
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# offset 2 in .Llo[0-15]: block count (unsigned short) = 1
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# offset 4 in .Llo[0-15]: block number (unsigned long)
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.Llo0: .long 0x06000001,0x00000000
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.Llo1: .long 0x06000001,0x00000000
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.long 0x00000000,0x00000000 # reserved
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.long 0x00000000,0x00000000 # reserved
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.long 0x00000000,0x00000000 # reserved
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.long 0x00000000,0x00000000 # reserved
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.long 0x00000000,0x02000000 # boot_info
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.long 0x00000000,0x00000000
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.long 0x00000000,0x00000000
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.long 0x00000000,0x00000000
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.long 0x00000000,0x00000000
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.Lend:
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