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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2010-02-26 22:37:51 +0100
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2010-02-26 22:37:32 +0100
commit61fd330dee1606a6bdb741f9c156bca386a4e438 (patch)
treef75e704da40d315edc830e5fc729d7108f4bb262 /arch/s390
parent34b9243a300736c08dc32eaeb2f359401fcf9c0a (diff)
downloadlinux-61fd330dee1606a6bdb741f9c156bca386a4e438.tar.bz2
[S390] codepage conversion of kernel parameter line
Move the ebcdic to ascii conversion of the kernel parameter line from head.S to early.c and convert the assembler code to C. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/kernel/early.c13
-rw-r--r--arch/s390/kernel/head.S18
2 files changed, 13 insertions, 18 deletions
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index 02e45861b55b..31d618a443af 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -405,8 +405,19 @@ static void __init append_to_cmdline(size_t (*ipl_data)(char *, size_t))
static void __init setup_boot_command_line(void)
{
+ int i;
+
+ /* convert arch command line to ascii */
+ for (i = 0; i < ARCH_COMMAND_LINE_SIZE; i++)
+ if (COMMAND_LINE[i] & 0x80)
+ break;
+ if (i < ARCH_COMMAND_LINE_SIZE)
+ EBCASC(COMMAND_LINE, ARCH_COMMAND_LINE_SIZE);
+ COMMAND_LINE[ARCH_COMMAND_LINE_SIZE-1] = 0;
+
/* copy arch command line */
- strlcpy(boot_command_line, COMMAND_LINE, ARCH_COMMAND_LINE_SIZE);
+ strlcpy(boot_command_line, strstrip(COMMAND_LINE),
+ ARCH_COMMAND_LINE_SIZE);
/* append IPL PARM data to the boot command line */
if (MACHINE_IS_VM)
diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S
index 9e4dc6084875..1fb59055c7ca 100644
--- a/arch/s390/kernel/head.S
+++ b/arch/s390/kernel/head.S
@@ -287,19 +287,7 @@ iplstart:
bz .Lagain1 # skip dateset trailer
la %r5,0(%r4,%r2)
lr %r3,%r2
-.Lidebc:
- tm 0(%r5),0x80 # high order bit set ?
- bo .Ldocv # yes -> convert from EBCDIC
- ahi %r5,-1
- bct %r3,.Lidebc
- b .Lnocv
-.Ldocv:
- l %r3,.Lcvtab
- tr 0(256,%r4),0(%r3) # convert parameters to ascii
- tr 256(256,%r4),0(%r3)
- tr 512(256,%r4),0(%r3)
- tr 768(122,%r4),0(%r3)
-.Lnocv: la %r3,COMMAND_LINE-PARMAREA(%r12) # load adr. of command line
+ la %r3,COMMAND_LINE-PARMAREA(%r12) # load adr. of command line
mvc 0(256,%r3),0(%r4)
mvc 256(256,%r3),256(%r4)
mvc 512(256,%r3),512(%r4)
@@ -383,7 +371,6 @@ iplstart:
.Linitrd:.long _end + 0x400000 # default address of initrd
.Lparm: .long PARMAREA
.Lstartup: .long startup
-.Lcvtab:.long _ebcasc # ebcdic to ascii table
.Lreset:.byte 0xc3,0xc8,0xc1,0xd5,0xc7,0xc5,0x40,0xd9,0xc4,0xd9,0x40
.byte 0xc1,0xd3,0xd3,0x40,0xd2,0xc5,0xc5,0xd7,0x40,0xd5,0xd6
.byte 0xc8,0xd6,0xd3,0xc4 # "change rdr all keep nohold"
@@ -416,13 +403,10 @@ start:
.sk8x8:
mvc 0(240,%r8),0(%r9) # copy iplparms into buffer
.gotr:
- l %r10,.tbl # EBCDIC to ASCII table
- tr 0(240,%r8),0(%r10)
slr %r0,%r0
st %r0,INITRD_SIZE+ARCH_OFFSET-PARMAREA(%r11)
st %r0,INITRD_START+ARCH_OFFSET-PARMAREA(%r11)
j startup # continue with startup
-.tbl: .long _ebcasc # translate table
.cmd: .long COMMAND_LINE # address of command line buffer
.parm: .long PARMAREA
.lowcase: