From: Martin Schwidefsky <schwidefsky@de.ibm.com>
To: linux-kernel@vger.kernel.org, cborntra@de.ibm.com
Subject: [S390] remove salipl memory detection.
Date: Thu, 26 Oct 2006 11:03:40 +0200 [thread overview]
Message-ID: <20061026090339.GF16270@skybase> (raw)
From: Christian Borntraeger <cborntra@de.ibm.com>
[S390] remove salipl memory detection.
The SALIPL entry point has an needless memory detection routine as we
later check the memory size again. The SALIPL code also uses diagnose
0x060 if we are running under VM, but this diagnose is not compatible
with the 64 bit addressing mode. The solution is to get rid of this
code and rely on the memory detection in the startup code.
Signed-off-by: Christian Borntraeger <cborntra@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
arch/s390/kernel/head.S | 21 ---------------------
1 files changed, 21 deletions(-)
diff -urpN linux-2.6/arch/s390/kernel/head.S linux-2.6-patched/arch/s390/kernel/head.S
--- linux-2.6/arch/s390/kernel/head.S 2006-10-26 10:43:38.000000000 +0200
+++ linux-2.6-patched/arch/s390/kernel/head.S 2006-10-26 10:44:07.000000000 +0200
@@ -418,24 +418,6 @@ start:
.gotr:
l %r10,.tbl # EBCDIC to ASCII table
tr 0(240,%r8),0(%r10)
- stidp __LC_CPUID # Are we running on VM maybe
- cli __LC_CPUID,0xff
- bnz .test
- .long 0x83300060 # diag 3,0,x'0060' - storage size
- b .done
-.test:
- mvc 0x68(8),.pgmnw # set up pgm check handler
- l %r2,.fourmeg
- lr %r3,%r2
- bctr %r3,%r0 # 4M-1
-.loop: iske %r0,%r3
- ar %r3,%r2
-.pgmx:
- sr %r3,%r2
- la %r3,1(%r3)
-.done:
- l %r1,.memsize
- st %r3,ARCH_OFFSET(%r1)
slr %r0,%r0
st %r0,INITRD_SIZE+ARCH_OFFSET-PARMAREA(%r11)
st %r0,INITRD_START+ARCH_OFFSET-PARMAREA(%r11)
@@ -443,9 +425,6 @@ start:
.tbl: .long _ebcasc # translate table
.cmd: .long COMMAND_LINE # address of command line buffer
.parm: .long PARMAREA
-.memsize: .long memory_size
-.fourmeg: .long 0x00400000 # 4M
-.pgmnw: .long 0x00080000,.pgmx
.lowcase:
.byte 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07
.byte 0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f
next reply other threads:[~2006-10-26 9:03 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-26 9:03 Martin Schwidefsky [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-12-04 14:49 [S390] remove salipl memory detection Martin Schwidefsky
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