diff options
Diffstat (limited to 'arch/s390/kernel/ipl.c')
| -rw-r--r-- | arch/s390/kernel/ipl.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c index f731185bf2bd..a83cf1fdd8f5 100644 --- a/arch/s390/kernel/ipl.c +++ b/arch/s390/kernel/ipl.c @@ -47,7 +47,7 @@ enum ipl_type { * Must be in data section since the bss section * is not cleared when these are accessed. */ -u16 ipl_devno __attribute__((__section__(".data"))) = 0; +static u16 ipl_devno __attribute__((__section__(".data"))) = 0; u32 ipl_flags __attribute__((__section__(".data"))) = 0; static char *ipl_type_str(enum ipl_type type) @@ -1038,6 +1038,27 @@ static int __init s390_ipl_init(void) __initcall(s390_ipl_init); +void __init ipl_save_parameters(void) +{ + struct cio_iplinfo iplinfo; + unsigned int *ipl_ptr; + void *src, *dst; + + if (cio_get_iplinfo(&iplinfo)) + return; + + ipl_devno = iplinfo.devno; + ipl_flags |= IPL_DEVNO_VALID; + if (!iplinfo.is_qdio) + return; + ipl_flags |= IPL_PARMBLOCK_VALID; + ipl_ptr = (unsigned int *)__LC_IPL_PARMBLOCK_PTR; + src = (void *)(unsigned long)*ipl_ptr; + dst = (void *)IPL_PARMBLOCK_ORIGIN; + memmove(dst, src, PAGE_SIZE); + *ipl_ptr = IPL_PARMBLOCK_ORIGIN; +} + static LIST_HEAD(rcall); static DEFINE_MUTEX(rcall_mutex); |