diff options
| author |   Heiko Carstens <heiko.carstens@de.ibm.com> | 2009-06-12 10:26:24 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-06-12 10:27:30 +0200 |
| commit | d90cbd469c9c7c1494fc2084af9319e6a557368b (patch) | |
| tree | efb312e668fa596a0493f5318c19d07795e3a8b0 /arch/s390/kernel/head.S | |
| parent | [S390] use facility list for cpu type safety check (diff) | |
| download | linux-dev-d90cbd469c9c7c1494fc2084af9319e6a557368b.tar.xz linux-dev-d90cbd469c9c7c1494fc2084af9319e6a557368b.zip | |
[S390] add mini sclp driver
This adds a mini sclp device driver for very early use. The primary
and probably only use will be to emit a message to the console if the
cpu doesn't provide the minimum required capabilities to run the kernel.
After printing the message a disabled wait will be loaded and the
machine stops operating.
Printing the message is also part of this patch.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/head.S')
| -rw-r--r-- | arch/s390/kernel/head.S | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S index bf8cf1caeffc..6d227413cbe7 100644 --- a/arch/s390/kernel/head.S +++ b/arch/s390/kernel/head.S @@ -1,7 +1,5 @@ /* - * arch/s390/kernel/head.S - * - * Copyright (C) IBM Corp. 1999,2006 + * Copyright IBM Corp. 1999,2009 * * Author(s): Hartmut Penner <hp@de.ibm.com> * Martin Schwidefsky <schwidefsky@de.ibm.com> @@ -494,7 +492,19 @@ startup:basr %r13,0 # get base n %r0,2f+12-.LPG0(%r13) cl %r0,2f+12-.LPG0(%r13) je 3f -1: lpsw 2f-.LPG0(13) # machine type not good enough, crash +1: l %r15,.Lstack-.LPG0(%r13) + ahi %r15,1<<(PAGE_SHIFT+THREAD_ORDER) # init_task_union+THREAD_SIZE + ahi %r15,-96 + la %r2,.Lals_string-.LPG0(%r13) + l %r3,.Lsclp_print-.LPG0(%r13) + basr %r14,%r3 + lpsw 2f-.LPG0(%r13) # machine type not good enough, crash +.Lals_string: + .asciz "The Linux kernel requires more recent processor hardware" +.Lsclp_print: + .long _sclp_print_early +.Lstack: + .long init_thread_union .align 16 2: .long 0x000a0000,0x8badcccc #if defined(CONFIG_64BIT) |