Commit 61fd330d authored by Martin Schwidefsky's avatar Martin Schwidefsky Committed by Martin Schwidefsky
Browse files

[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: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 34b9243a

arch/s390/kernel/early.c

+12 −1
Original line number Diff line number Diff line
@@ -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)

arch/s390/kernel/head.S

+1 −17
Original line number Diff line number Diff line
@@ -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: