s390: move ipl block and cmd line handling to early boot phase

To distinguish zfcpdump case and to be able to parse some of the kernel
command line arguments early (e.g. mem=) ipl block retrieval and command
line construction code is moved to the early boot phase.

"memory_end" is set up correctly respecting "mem=" and hsa_size in case
of the zfcpdump.

arch/s390/boot/string.c is introduced to provide string handling and
command line parsing functions to early boot phase code for the compressed
kernel image case.

Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 3 insertions, 44 deletions

diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index 5b28b434f8a1..af5c2b3f7065 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -29,10 +29,9 @@
 #include <asm/cpcmd.h>
 #include <asm/sclp.h>
 #include <asm/facility.h>
+#include <asm/boot_data.h>
 #include "entry.h"
 
-static void __init setup_boot_command_line(void);
-
 /*
  * Initialize storage key for kernel pages
  */
@@ -284,51 +283,11 @@ static int __init cad_setup(char *str)
 }
 early_param("cad", cad_setup);
 
-/* Set up boot command line */
-static void __init append_to_cmdline(size_t (*ipl_data)(char *, size_t))
-{
-	char *parm, *delim;
-	size_t rc, len;
-
-	len = strlen(boot_command_line);
-
-	delim = boot_command_line + len;	/* '\0' character position */
-	parm  = boot_command_line + len + 1;	/* append right after '\0' */
-
-	rc = ipl_data(parm, COMMAND_LINE_SIZE - len - 1);
-	if (rc) {
-		if (*parm == '=')
-			memmove(boot_command_line, parm + 1, rc);
-		else
-			*delim = ' ';		/* replace '\0' with space */
-	}
-}
-
-static inline int has_ebcdic_char(const char *str)
-{
-	int i;
-
-	for (i = 0; str[i]; i++)
-		if (str[i] & 0x80)
-			return 1;
-	return 0;
-}
-
+char __bootdata(early_command_line)[COMMAND_LINE_SIZE];
 static void __init setup_boot_command_line(void)
 {
-	COMMAND_LINE[ARCH_COMMAND_LINE_SIZE - 1] = 0;
-	/* convert arch command line to ascii if necessary */
-	if (has_ebcdic_char(COMMAND_LINE))
-		EBCASC(COMMAND_LINE, ARCH_COMMAND_LINE_SIZE);
 	/* copy arch command line */
-	strlcpy(boot_command_line, strstrip(COMMAND_LINE),
-		ARCH_COMMAND_LINE_SIZE);
-
-	/* append IPL PARM data to the boot command line */
-	if (MACHINE_IS_VM)
-		append_to_cmdline(append_ipl_vmparm);
-
-	append_to_cmdline(append_ipl_scpdata);
+	strlcpy(boot_command_line, early_command_line, ARCH_COMMAND_LINE_SIZE);
 }
 
 static void __init check_image_bootable(void)