[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>

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: