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50be634507
The original bootmem allocator is getting replaced by memblock. To cover the needs of the s390 kdump implementation the physical memory list is used. With this patch the bootmem allocator and its bitmaps are completely removed from s390. Signed-off-by: Philipp Hachtmann <phacht@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
107 lines
2.9 KiB
ArmAsm
107 lines
2.9 KiB
ArmAsm
/*
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* Copyright IBM Corp. 2005, 2010
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*
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* Author(s): Hartmut Penner <hp@de.ibm.com>
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* Martin Schwidefsky <schwidefsky@de.ibm.com>
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* Rob van der Heij <rvdhei@iae.nl>
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* Heiko Carstens <heiko.carstens@de.ibm.com>
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*
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*/
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#include <linux/init.h>
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#include <linux/linkage.h>
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#include <asm/asm-offsets.h>
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#include <asm/thread_info.h>
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#include <asm/page.h>
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__HEAD
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ENTRY(startup_continue)
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basr %r13,0 # get base
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.LPG1:
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l %r1,.Lbase_cc-.LPG1(%r13)
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mvc 0(8,%r1),__LC_LAST_UPDATE_CLOCK
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lctl %c0,%c15,.Lctl-.LPG1(%r13) # load control registers
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l %r12,.Lparmaddr-.LPG1(%r13) # pointer to parameter area
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# move IPL device to lowcore
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#
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# Setup stack
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#
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l %r15,.Linittu-.LPG1(%r13)
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st %r15,__LC_THREAD_INFO # cache thread info in lowcore
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mvc __LC_CURRENT(4),__TI_task(%r15)
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ahi %r15,1<<(PAGE_SHIFT+THREAD_ORDER) # init_task_union+THREAD_SIZE
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st %r15,__LC_KERNEL_STACK # set end of kernel stack
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ahi %r15,-96
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#
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# Save ipl parameters, clear bss memory, initialize storage key for kernel pages,
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# and create a kernel NSS if the SAVESYS= parm is defined
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#
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l %r14,.Lstartup_init-.LPG1(%r13)
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basr %r14,%r14
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lpsw .Lentry-.LPG1(13) # jump to _stext in primary-space,
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# virtual and never return ...
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.align 8
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.Lentry:.long 0x00080000,0x80000000 + _stext
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.Lctl: .long 0x04b50000 # cr0: various things
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.long 0 # cr1: primary space segment table
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.long .Lduct # cr2: dispatchable unit control table
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.long 0 # cr3: instruction authorization
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.long 0 # cr4: instruction authorization
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.long .Lduct # cr5: primary-aste origin
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.long 0 # cr6: I/O interrupts
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.long 0 # cr7: secondary space segment table
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.long 0 # cr8: access registers translation
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.long 0 # cr9: tracing off
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.long 0 # cr10: tracing off
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.long 0 # cr11: tracing off
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.long 0 # cr12: tracing off
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.long 0 # cr13: home space segment table
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.long 0xc0000000 # cr14: machine check handling off
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.long 0 # cr15: linkage stack operations
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.Lbss_bgn: .long __bss_start
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.Lbss_end: .long _end
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.Lparmaddr: .long PARMAREA
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.Linittu: .long init_thread_union
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.Lstartup_init:
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.long startup_init
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.align 64
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.Lduct: .long 0,0,0,0,.Lduald,0,0,0
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.long 0,0,0,0,0,0,0,0
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.align 128
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.Lduald:.rept 8
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.long 0x80000000,0,0,0 # invalid access-list entries
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.endr
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.Lbase_cc:
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.long sched_clock_base_cc
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ENTRY(_ehead)
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.org 0x100000 - 0x11000 # head.o ends at 0x11000
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#
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# startup-code, running in absolute addressing mode
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#
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ENTRY(_stext)
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basr %r13,0 # get base
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.LPG3:
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# check control registers
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stctl %c0,%c15,0(%r15)
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oi 2(%r15),0x60 # enable sigp emergency & external call
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oi 0(%r15),0x10 # switch on low address protection
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lctl %c0,%c15,0(%r15)
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#
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lam 0,15,.Laregs-.LPG3(%r13) # load access regs needed by uaccess
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l %r14,.Lstart-.LPG3(%r13)
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basr %r14,%r14 # call start_kernel
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#
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# We returned from start_kernel ?!? PANIK
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#
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basr %r13,0
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lpsw .Ldw-.(%r13) # load disabled wait psw
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#
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.align 8
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.Ldw: .long 0x000a0000,0x00000000
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.Lstart:.long start_kernel
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.Laregs:.long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
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