s390/boot: convert initial lowcore to C

Convert initial lowcore to C and use proper defines and structures to
initialize it. This should make the z/VM ipl procedure a bit less magic.

Acked-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Reviewed-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

1 files changed, 8 insertions, 54 deletions

diff --git a/arch/s390/boot/head.S b/arch/s390/boot/head.S
index a63f7de76462..ceb118621eaa 100644
--- a/arch/s390/boot/head.S
+++ b/arch/s390/boot/head.S
@@ -27,61 +27,15 @@
 #include <asm/page.h>
 #include <asm/ptrace.h>
 #include <asm/sclp.h>
+#include "boot.h"
 
 #define ARCH_OFFSET	4
 
 #define EP_OFFSET	0x10008
 #define EP_STRING	"S390EP"
-
-#define IPL_START	0x200
+#define IPL_BS		0x730
 
 __HEAD
-
-#define IPL_BS	0x730
-	.org	0
-	.long	0x00080000,0x80000000+IPL_START	# The first 24 bytes are loaded
-	.long	0x02000018,0x60000050		# by ipl to addresses 0-23.
-	.long	0x02000068,0x60000050		# (a PSW and two CCWs).
-	.fill	80-24,1,0x40			# bytes 24-79 are discarded !!
-	.long	0x020000f0,0x60000050		# The next 160 byte are loaded
-	.long	0x02000140,0x60000050		# to addresses 0x18-0xb7
-	.long	0x02000190,0x60000050		# They form the continuation
-	.long	0x020001e0,0x60000050		# of the CCW program started
-	.long	0x02000230,0x60000050		# by ipl and load the range
-	.long	0x02000280,0x60000050		# 0x0f0-0x730 from the image
-	.long	0x020002d0,0x60000050		# to the range 0x0f0-0x730
-	.long	0x02000320,0x60000050		# in memory. At the end of
-	.long	0x02000370,0x60000050		# the channel program the PSW
-	.long	0x020003c0,0x60000050		# at location 0 is loaded.
-	.long	0x02000410,0x60000050		# Initial processing starts
-	.long	0x02000460,0x60000050		# at 0x200 = iplstart.
-	.long	0x020004b0,0x60000050
-	.long	0x02000500,0x60000050
-	.long	0x02000550,0x60000050
-	.long	0x020005a0,0x60000050
-	.long	0x020005f0,0x60000050
-	.long	0x02000640,0x60000050
-	.long	0x02000690,0x60000050
-	.long	0x020006e0,0x20000050
-
-# The restart psw points to ipl_entry, which allows to load a kernel image
-# into memory and starting it by a psw restart on any cpu.
-# All other default psw new locations contain a disabled wait psw where the
-# address indicates which psw was loaded.
-	.org	__LC_RST_NEW_PSW
-	.quad	0,IPL_START
-	.org	__LC_EXT_NEW_PSW
-	.quad	0x0002000180000000,__LC_EXT_NEW_PSW
-	.org	__LC_SVC_NEW_PSW
-	.quad	0x0002000180000000,__LC_SVC_NEW_PSW
-	.org	__LC_PGM_NEW_PSW
-	.quad	0x0002000180000000,__LC_PGM_NEW_PSW
-	.org	__LC_MCK_NEW_PSW
-	.quad	0x0002000180000000,__LC_MCK_NEW_PSW
-	.org	__LC_IO_NEW_PSW
-	.quad	0x0002000180000000,__LC_IO_NEW_PSW
-
-	.org	IPL_START
 ipl_start:
 	j	.Liplcont
 #
@@ -279,10 +233,10 @@ ipl_start:
 # this is called either by the ipl loader or directly by PSW restart
 # or linload or SALIPL
 #
-	.org	STARTUP_NORMAL_OFFSET
+	.org	STARTUP_NORMAL_OFFSET - IPL_START
 SYM_CODE_START(startup)
 	j	startup_normal
-	.org	EP_OFFSET
+	.org	EP_OFFSET - IPL_START
 #
 # This is a list of s390 kernel entry points. At address 0x1000f the number of
 # valid entry points is stored.
@@ -294,7 +248,7 @@ SYM_CODE_START(startup)
 #
 # kdump startup-code, running in 64 bit absolute addressing mode
 #
-	.org	STARTUP_KDUMP_OFFSET
+	.org	STARTUP_KDUMP_OFFSET - IPL_START
 	j	startup_kdump
 SYM_CODE_END(startup)
 SYM_CODE_START_LOCAL(startup_normal)
@@ -384,7 +338,7 @@ SYM_CODE_END(startup_pgm_check_handler)
 # params at 10400 (setup.h)
 # Must be keept in sync with struct parmarea in setup.h
 #
-	.org	PARMAREA
+	.org	PARMAREA - IPL_START
 SYM_DATA_START(parmarea)
 	.quad	0			# IPL_DEVICE
 	.quad	0			# INITRD_START
@@ -394,8 +348,8 @@ SYM_DATA_START(parmarea)
 	.quad	kernel_version		# points to kernel version string
 	.quad	COMMAND_LINE_SIZE
 
-	.org	COMMAND_LINE
+	.org	COMMAND_LINE - IPL_START
 	.byte	"root=/dev/ram0 ro"
 	.byte	0
-	.org	PARMAREA+__PARMAREA_SIZE
+	.org	PARMAREA+__PARMAREA_SIZE - IPL_START
 SYM_DATA_END(parmarea)