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[S390] add support for compressed kernels

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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>
This commit is contained in:
Martin Schwidefsky
2010-02-26 22:37:53 +01:00
committed by Martin Schwidefsky
parent 73bfa5f2f7
commit 1844c9bc0b
15 changed files with 489 additions and 44 deletions
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43
arch/s390/kernel/head.S
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@@ -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 @@ start:
# 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 @@ startup:basr %r13,0 # get base
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 @@ startup:basr %r13,0 # get base
.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 @@ startup:basr %r13,0 # get base
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 @@ startup:basr %r13,0 # get base
.byte "root=/dev/ram0 ro"
.byte 0
#ifdef CONFIG_64BIT
#include "head64.S"
#else
#include "head31.S"
#endif
.org 0x11000