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| author | Heiko Carstens <hca@linux.ibm.com> | 2022-04-27 04:14:34 +0200 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2022-05-06 20:45:15 +0200 |
| commit | 834979c27f5281f37ae9ce5191134f26ae7b9fd0 (patch) | |
| tree | 44deaa217d131bfd74ec89378793fda7a474916d /arch/s390/boot/head.S | |
| parent | 67a9c428ef35780d09e5a3c1247919789a8212b4 (diff) | |
| download | linux-834979c27f5281f37ae9ce5191134f26ae7b9fd0.tar.gz linux-834979c27f5281f37ae9ce5191134f26ae7b9fd0.tar.bz2 linux-834979c27f5281f37ae9ce5191134f26ae7b9fd0.zip | |
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>
Diffstat (limited to 'arch/s390/boot/head.S')
| -rw-r--r-- | arch/s390/boot/head.S | 62 |
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) |