[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/head.S b/arch/s390/kernel/head.S
index 1fb5905..ca4a62b 100644
--- a/arch/s390/kernel/head.S
+++ b/arch/s390/kernel/head.S
@@ -1,5 +1,5 @@
/*
- * Copyright IBM Corp. 1999,2009
+ * Copyright IBM Corp. 1999,2010
*
* Author(s): Hartmut Penner <hp@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
@@ -22,11 +22,9 @@
*/
#include <linux/init.h>
-#include <asm/setup.h>
#include <asm/asm-offsets.h>
#include <asm/thread_info.h>
#include <asm/page.h>
-#include <asm/cpu.h>
#ifdef CONFIG_64BIT
#define ARCH_OFFSET 4
@@ -450,16 +448,15 @@
# or linload or SALIPL
#
.org 0x10000
-startup:basr %r13,0 # get base
+ .globl startup
+startup:
+ basr %r13,0 # get base
.LPG0:
xc 0x200(256),0x200 # partially clear lowcore
xc 0x300(256),0x300
- l %r1,5f-.LPG0(%r13)
- stck 0(%r1)
- spt 6f-.LPG0(%r13)
- mvc __LC_LAST_UPDATE_CLOCK(8),0(%r1)
- mvc __LC_LAST_UPDATE_TIMER(8),6f-.LPG0(%r13)
- mvc __LC_EXIT_TIMER(8),5f-.LPG0(%r13)
+ stck __LC_LAST_UPDATE_CLOCK
+ spt 5f-.LPG0(%r13)
+ mvc __LC_LAST_UPDATE_TIMER(8),5f-.LPG0(%r13)
#ifndef CONFIG_MARCH_G5
# check capabilities against MARCH_{G5,Z900,Z990,Z9_109,Z10}
xc __LC_STFL_FAC_LIST(8),__LC_STFL_FAC_LIST
@@ -477,7 +474,6 @@
cl %r0,2f+12-.LPG0(%r13)
je 3f
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)
@@ -488,7 +484,7 @@
.Lsclp_print:
.long _sclp_print_early
.Lstack:
- .long init_thread_union
+ .long 0x8000 + (1<<(PAGE_SHIFT+THREAD_ORDER))
.align 16
2: .long 0x000a0000,0x8badcccc
#if defined(CONFIG_64BIT)
@@ -515,13 +511,22 @@
3:
#endif
+#ifdef CONFIG_64BIT
+ 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
+ jg startup_continue
+#else
+ mvi __LC_AR_MODE_ID,0 # set ESA flag (mode 0)
l %r13,4f-.LPG0(%r13)
b 0(%r13)
- .align 4
-4: .long startup_continue
-5: .long sched_clock_base_cc
.align 8
-6: .long 0x7fffffff,0xffffffff
+4: .long startup_continue
+#endif
+ .align 8
+5: .long 0x7fffffff,0xffffffff
#
# params at 10400 (setup.h)
@@ -535,8 +540,4 @@
.byte "root=/dev/ram0 ro"
.byte 0
-#ifdef CONFIG_64BIT
-#include "head64.S"
-#else
-#include "head31.S"
-#endif
+ .org 0x11000