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, 4 insertions, 22 deletions

diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 36fb37d7a36c..ae3810c04872 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -90,8 +90,8 @@ char elf_platform[ELF_PLATFORM_SIZE];
 
 unsigned long int_hwcap = 0;
 
-int __initdata memory_end_set;
-unsigned long __initdata memory_end;
+int __bootdata(memory_end_set);
+unsigned long __bootdata(memory_end);
 unsigned long __bootdata(max_physmem_end);
 struct mem_detect_info __bootdata(mem_detect);
 
@@ -286,15 +286,6 @@ void machine_power_off(void)
 void (*pm_power_off)(void) = machine_power_off;
 EXPORT_SYMBOL_GPL(pm_power_off);
 
-static int __init early_parse_mem(char *p)
-{
-	memory_end = memparse(p, &p);
-	memory_end &= PAGE_MASK;
-	memory_end_set = 1;
-	return 0;
-}
-early_param("mem", early_parse_mem);
-
 static int __init parse_vmalloc(char *arg)
 {
 	if (!arg)
@@ -605,17 +596,8 @@ static struct notifier_block kdump_mem_nb = {
  */
 static void reserve_memory_end(void)
 {
-#ifdef CONFIG_CRASH_DUMP
-	if (ipl_info.type == IPL_TYPE_FCP_DUMP &&
-	    !OLDMEM_BASE && sclp.hsa_size) {
-		memory_end = sclp.hsa_size;
-		memory_end &= PAGE_MASK;
-		memory_end_set = 1;
-	}
-#endif
-	if (!memory_end_set)
-		return;
-	memblock_reserve(memory_end, ULONG_MAX);
+	if (memory_end_set)
+		memblock_reserve(memory_end, ULONG_MAX);
 }
 
 /*