[S390] add support for compressed kernels
Add the "bzImage" compile target and the necessary code to generate
compressed kernel images. The old style uncompressed "image" target
is preserved, a simple make will build them both.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S
index 5419aab..39580e7 100644
--- a/arch/s390/kernel/head64.S
+++ b/arch/s390/kernel/head64.S
@@ -1,7 +1,7 @@
/*
* arch/s390/kernel/head64.S
*
- * Copyright (C) IBM Corp. 1999,2006
+ * Copyright (C) IBM Corp. 1999,2010
*
* Author(s): Hartmut Penner <hp@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
@@ -10,18 +10,17 @@
*
*/
- .org 0x11000
+#include <linux/init.h>
+#include <asm/asm-offsets.h>
+#include <asm/thread_info.h>
+#include <asm/page.h>
+__HEAD
+ .globl startup_continue
startup_continue:
- basr %r13,0 # get base
-.LPG1: sll %r13,1 # remove high order bit
- srl %r13,1
- mvi __LC_AR_MODE_ID,1 # set esame flag
- slr %r0,%r0 # set cpuid to zero
- lhi %r1,2 # mode 2 = esame (dump)
- sigp %r1,%r0,0x12 # switch to esame mode
- sam64 # switch to 64 bit mode
- llgfr %r13,%r13 # clear high-order half of base reg
+ larl %r1,sched_clock_base_cc
+ mvc 0(8,%r1),__LC_LAST_UPDATE_CLOCK
+ larl %r13,.LPG1 # get base
lmh %r0,%r15,.Lzero64-.LPG1(%r13) # clear high-order half
lctlg %c0,%c15,.Lctl-.LPG1(%r13) # load control registers
lg %r12,.Lparmaddr-.LPG1(%r13) # pointer to parameter area
@@ -46,6 +45,7 @@
lpswe .Lentry-.LPG1(13) # jump to _stext in primary-space,
# virtual and never return ...
.align 16
+.LPG1:
.Lentry:.quad 0x0000000180000000,_stext
.Lctl: .quad 0x04350002 # cr0: various things
.quad 0 # cr1: primary space segment table
@@ -78,9 +78,9 @@
.long 0x80000000,0,0,0 # invalid access-list entries
.endr
- .org 0x12000
.globl _ehead
_ehead:
+
#ifdef CONFIG_SHARED_KERNEL
.org 0x100000
#endif