18282cd64SVasily Gorbik/* SPDX-License-Identifier: GPL-2.0 */ 28282cd64SVasily Gorbik/* 38282cd64SVasily Gorbik * Copyright IBM Corp. 1999, 2010 48282cd64SVasily Gorbik * 58282cd64SVasily Gorbik * Author(s): Hartmut Penner <hp@de.ibm.com> 68282cd64SVasily Gorbik * Martin Schwidefsky <schwidefsky@de.ibm.com> 78282cd64SVasily Gorbik * Rob van der Heij <rvdhei@iae.nl> 88282cd64SVasily Gorbik * 98282cd64SVasily Gorbik * There are 5 different IPL methods 108282cd64SVasily Gorbik * 1) load the image directly into ram at address 0 and do an PSW restart 118282cd64SVasily Gorbik * 2) linload will load the image from address 0x10000 to memory 0x10000 128282cd64SVasily Gorbik * and start the code thru LPSW 0x0008000080010000 (VM only, deprecated) 138282cd64SVasily Gorbik * 3) generate the tape ipl header, store the generated image on a tape 148282cd64SVasily Gorbik * and ipl from it 158282cd64SVasily Gorbik * In case of SL tape you need to IPL 5 times to get past VOL1 etc 168282cd64SVasily Gorbik * 4) generate the vm reader ipl header, move the generated image to the 178282cd64SVasily Gorbik * VM reader (use option NOH!) and do a ipl from reader (VM only) 188282cd64SVasily Gorbik * 5) direct call of start by the SALIPL loader 198282cd64SVasily Gorbik * We use the cpuid to distinguish between VM and native ipl 208282cd64SVasily Gorbik * params for kernel are pushed to 0x10400 (see setup.h) 218282cd64SVasily Gorbik * 228282cd64SVasily Gorbik */ 238282cd64SVasily Gorbik 248282cd64SVasily Gorbik#include <linux/init.h> 258282cd64SVasily Gorbik#include <linux/linkage.h> 268282cd64SVasily Gorbik#include <asm/asm-offsets.h> 278282cd64SVasily Gorbik#include <asm/page.h> 288282cd64SVasily Gorbik#include <asm/ptrace.h> 290029b4d1SAlexander Egorenkov#include <asm/sclp.h> 308282cd64SVasily Gorbik 318282cd64SVasily Gorbik#define ARCH_OFFSET 4 328282cd64SVasily Gorbik 336a24d466SAlexander Egorenkov#define EP_OFFSET 0x10008 346a24d466SAlexander Egorenkov#define EP_STRING "S390EP" 356a24d466SAlexander Egorenkov 36*73475797SHeiko Carstens#define IPL_START 0x200 37*73475797SHeiko Carstens 388282cd64SVasily Gorbik__HEAD 398282cd64SVasily Gorbik 408282cd64SVasily Gorbik#define IPL_BS 0x730 418282cd64SVasily Gorbik .org 0 42*73475797SHeiko Carstens .long 0x00080000,0x80000000+IPL_START # The first 24 bytes are loaded 438282cd64SVasily Gorbik .long 0x02000018,0x60000050 # by ipl to addresses 0-23. 448282cd64SVasily Gorbik .long 0x02000068,0x60000050 # (a PSW and two CCWs). 458282cd64SVasily Gorbik .fill 80-24,1,0x40 # bytes 24-79 are discarded !! 468282cd64SVasily Gorbik .long 0x020000f0,0x60000050 # The next 160 byte are loaded 478282cd64SVasily Gorbik .long 0x02000140,0x60000050 # to addresses 0x18-0xb7 488282cd64SVasily Gorbik .long 0x02000190,0x60000050 # They form the continuation 498282cd64SVasily Gorbik .long 0x020001e0,0x60000050 # of the CCW program started 508282cd64SVasily Gorbik .long 0x02000230,0x60000050 # by ipl and load the range 518282cd64SVasily Gorbik .long 0x02000280,0x60000050 # 0x0f0-0x730 from the image 528282cd64SVasily Gorbik .long 0x020002d0,0x60000050 # to the range 0x0f0-0x730 538282cd64SVasily Gorbik .long 0x02000320,0x60000050 # in memory. At the end of 548282cd64SVasily Gorbik .long 0x02000370,0x60000050 # the channel program the PSW 558282cd64SVasily Gorbik .long 0x020003c0,0x60000050 # at location 0 is loaded. 568282cd64SVasily Gorbik .long 0x02000410,0x60000050 # Initial processing starts 578282cd64SVasily Gorbik .long 0x02000460,0x60000050 # at 0x200 = iplstart. 588282cd64SVasily Gorbik .long 0x020004b0,0x60000050 598282cd64SVasily Gorbik .long 0x02000500,0x60000050 608282cd64SVasily Gorbik .long 0x02000550,0x60000050 618282cd64SVasily Gorbik .long 0x020005a0,0x60000050 628282cd64SVasily Gorbik .long 0x020005f0,0x60000050 638282cd64SVasily Gorbik .long 0x02000640,0x60000050 648282cd64SVasily Gorbik .long 0x02000690,0x60000050 658282cd64SVasily Gorbik .long 0x020006e0,0x20000050 668282cd64SVasily Gorbik 67da9ed30dSVasily Gorbik .org __LC_RST_NEW_PSW # 0x1a0 68*73475797SHeiko Carstens .quad 0,IPL_START 6913b5bd8aSVasily Gorbik .org __LC_EXT_NEW_PSW # 0x1b0 7013b5bd8aSVasily Gorbik .quad 0x0002000180000000,0x1b0 # disabled wait 71da9ed30dSVasily Gorbik .org __LC_PGM_NEW_PSW # 0x1d0 72da9ed30dSVasily Gorbik .quad 0x0000000180000000,startup_pgm_check_handler 7313b5bd8aSVasily Gorbik .org __LC_IO_NEW_PSW # 0x1f0 7413b5bd8aSVasily Gorbik .quad 0x0002000180000000,0x1f0 # disabled wait 758e5a7627SMartin Schwidefsky 76*73475797SHeiko Carstens .org IPL_START 77*73475797SHeiko Carstensipl_start: 78*73475797SHeiko Carstens j .Liplcont 798282cd64SVasily Gorbik# 808282cd64SVasily Gorbik# subroutine to wait for end I/O 818282cd64SVasily Gorbik# 828282cd64SVasily Gorbik.Lirqwait: 838282cd64SVasily Gorbik mvc __LC_IO_NEW_PSW(16),.Lnewpsw # set up IO interrupt psw 848282cd64SVasily Gorbik lpsw .Lwaitpsw 858282cd64SVasily Gorbik.Lioint: 868282cd64SVasily Gorbik br %r14 878282cd64SVasily Gorbik .align 8 888282cd64SVasily Gorbik.Lnewpsw: 898282cd64SVasily Gorbik .quad 0x0000000080000000,.Lioint 908282cd64SVasily Gorbik.Lwaitpsw: 918282cd64SVasily Gorbik .long 0x020a0000,0x80000000+.Lioint 928282cd64SVasily Gorbik 938282cd64SVasily Gorbik# 948282cd64SVasily Gorbik# subroutine for loading cards from the reader 958282cd64SVasily Gorbik# 968282cd64SVasily Gorbik.Lloader: 978282cd64SVasily Gorbik la %r4,0(%r14) 988282cd64SVasily Gorbik la %r3,.Lorb # r2 = address of orb into r2 998282cd64SVasily Gorbik la %r5,.Lirb # r4 = address of irb 1008282cd64SVasily Gorbik la %r6,.Lccws 1018282cd64SVasily Gorbik la %r7,20 1028282cd64SVasily Gorbik.Linit: 1038282cd64SVasily Gorbik st %r2,4(%r6) # initialize CCW data addresses 1048282cd64SVasily Gorbik la %r2,0x50(%r2) 1058282cd64SVasily Gorbik la %r6,8(%r6) 1068282cd64SVasily Gorbik bct 7,.Linit 1078282cd64SVasily Gorbik 1088282cd64SVasily Gorbik lctl %c6,%c6,.Lcr6 # set IO subclass mask 1098282cd64SVasily Gorbik slr %r2,%r2 1108282cd64SVasily Gorbik.Lldlp: 1118282cd64SVasily Gorbik ssch 0(%r3) # load chunk of 1600 bytes 1128282cd64SVasily Gorbik bnz .Llderr 1138282cd64SVasily Gorbik.Lwait4irq: 1148282cd64SVasily Gorbik bas %r14,.Lirqwait 1158282cd64SVasily Gorbik c %r1,__LC_SUBCHANNEL_ID # compare subchannel number 1168282cd64SVasily Gorbik bne .Lwait4irq 1178282cd64SVasily Gorbik tsch 0(%r5) 1188282cd64SVasily Gorbik 1198282cd64SVasily Gorbik slr %r0,%r0 1208282cd64SVasily Gorbik ic %r0,8(%r5) # get device status 1218282cd64SVasily Gorbik chi %r0,8 # channel end ? 1228282cd64SVasily Gorbik be .Lcont 1238282cd64SVasily Gorbik chi %r0,12 # channel end + device end ? 1248282cd64SVasily Gorbik be .Lcont 1258282cd64SVasily Gorbik 1268282cd64SVasily Gorbik l %r0,4(%r5) 1278282cd64SVasily Gorbik s %r0,8(%r3) # r0/8 = number of ccws executed 1288282cd64SVasily Gorbik mhi %r0,10 # *10 = number of bytes in ccws 1298282cd64SVasily Gorbik lh %r3,10(%r5) # get residual count 1308282cd64SVasily Gorbik sr %r0,%r3 # #ccws*80-residual=#bytes read 1318282cd64SVasily Gorbik ar %r2,%r0 1328282cd64SVasily Gorbik 1338282cd64SVasily Gorbik br %r4 # r2 contains the total size 1348282cd64SVasily Gorbik 1358282cd64SVasily Gorbik.Lcont: 1368282cd64SVasily Gorbik ahi %r2,0x640 # add 0x640 to total size 1378282cd64SVasily Gorbik la %r6,.Lccws 1388282cd64SVasily Gorbik la %r7,20 1398282cd64SVasily Gorbik.Lincr: 1408282cd64SVasily Gorbik l %r0,4(%r6) # update CCW data addresses 1418282cd64SVasily Gorbik ahi %r0,0x640 1428282cd64SVasily Gorbik st %r0,4(%r6) 1438282cd64SVasily Gorbik ahi %r6,8 1448282cd64SVasily Gorbik bct 7,.Lincr 1458282cd64SVasily Gorbik 1468282cd64SVasily Gorbik b .Lldlp 1478282cd64SVasily Gorbik.Llderr: 1488282cd64SVasily Gorbik lpsw .Lcrash 1498282cd64SVasily Gorbik 1508282cd64SVasily Gorbik .align 8 1518282cd64SVasily Gorbik.Lorb: .long 0x00000000,0x0080ff00,.Lccws 1528282cd64SVasily Gorbik.Lirb: .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 1538282cd64SVasily Gorbik.Lcr6: .long 0xff000000 1548282cd64SVasily Gorbik.Lloadp:.long 0,0 1558282cd64SVasily Gorbik .align 8 1568282cd64SVasily Gorbik.Lcrash:.long 0x000a0000,0x00000000 1578282cd64SVasily Gorbik 1588282cd64SVasily Gorbik .align 8 1598282cd64SVasily Gorbik.Lccws: .rept 19 1608282cd64SVasily Gorbik .long 0x02600050,0x00000000 1618282cd64SVasily Gorbik .endr 1628282cd64SVasily Gorbik .long 0x02200050,0x00000000 1638282cd64SVasily Gorbik 164*73475797SHeiko Carstens.Liplcont: 1658282cd64SVasily Gorbik mvi __LC_AR_MODE_ID,1 # set esame flag 1668282cd64SVasily Gorbik slr %r0,%r0 # set cpuid to zero 1678282cd64SVasily Gorbik lhi %r1,2 # mode 2 = esame (dump) 1688282cd64SVasily Gorbik sigp %r1,%r0,0x12 # switch to esame mode 1698282cd64SVasily Gorbik bras %r13,0f 1708282cd64SVasily Gorbik .fill 16,4,0x0 1718282cd64SVasily Gorbik0: lmh %r0,%r15,0(%r13) # clear high-order half of gprs 1728282cd64SVasily Gorbik sam31 # switch to 31 bit addressing mode 1738282cd64SVasily Gorbik lh %r1,__LC_SUBCHANNEL_ID # test if subchannel number 1748282cd64SVasily Gorbik bct %r1,.Lnoload # is valid 1758282cd64SVasily Gorbik l %r1,__LC_SUBCHANNEL_ID # load ipl subchannel number 1768282cd64SVasily Gorbik la %r2,IPL_BS # load start address 1778282cd64SVasily Gorbik bas %r14,.Lloader # load rest of ipl image 1788282cd64SVasily Gorbik l %r12,.Lparm # pointer to parameter area 1798282cd64SVasily Gorbik st %r1,IPL_DEVICE+ARCH_OFFSET-PARMAREA(%r12) # save ipl device number 1808282cd64SVasily Gorbik 1818282cd64SVasily Gorbik# 1828282cd64SVasily Gorbik# load parameter file from ipl device 1838282cd64SVasily Gorbik# 1848282cd64SVasily Gorbik.Lagain1: 1858282cd64SVasily Gorbik l %r2,.Linitrd # ramdisk loc. is temp 1868282cd64SVasily Gorbik bas %r14,.Lloader # load parameter file 1878282cd64SVasily Gorbik ltr %r2,%r2 # got anything ? 1888282cd64SVasily Gorbik bz .Lnopf 1895ecb2da6SSven Schnelle l %r3,MAX_COMMAND_LINE_SIZE+ARCH_OFFSET-PARMAREA(%r12) 1905ecb2da6SSven Schnelle ahi %r3,-1 1915ecb2da6SSven Schnelle clr %r2,%r3 1925ecb2da6SSven Schnelle bl .Lnotrunc 1935ecb2da6SSven Schnelle lr %r2,%r3 1948282cd64SVasily Gorbik.Lnotrunc: 1958282cd64SVasily Gorbik l %r4,.Linitrd 1968282cd64SVasily Gorbik clc 0(3,%r4),.L_hdr # if it is HDRx 1978282cd64SVasily Gorbik bz .Lagain1 # skip dataset header 1988282cd64SVasily Gorbik clc 0(3,%r4),.L_eof # if it is EOFx 1998282cd64SVasily Gorbik bz .Lagain1 # skip dateset trailer 2005ecb2da6SSven Schnelle 2015ecb2da6SSven Schnelle lr %r5,%r2 2025ecb2da6SSven Schnelle la %r6,COMMAND_LINE-PARMAREA(%r12) 2035ecb2da6SSven Schnelle lr %r7,%r2 2045ecb2da6SSven Schnelle ahi %r7,1 2055ecb2da6SSven Schnelle mvcl %r6,%r4 2068282cd64SVasily Gorbik.Lnopf: 2078282cd64SVasily Gorbik 2088282cd64SVasily Gorbik# 2098282cd64SVasily Gorbik# load ramdisk from ipl device 2108282cd64SVasily Gorbik# 2118282cd64SVasily Gorbik.Lagain2: 2128282cd64SVasily Gorbik l %r2,.Linitrd # addr of ramdisk 2138282cd64SVasily Gorbik st %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) 2148282cd64SVasily Gorbik bas %r14,.Lloader # load ramdisk 2158282cd64SVasily Gorbik st %r2,INITRD_SIZE+ARCH_OFFSET-PARMAREA(%r12) # store size of rd 2168282cd64SVasily Gorbik ltr %r2,%r2 2178282cd64SVasily Gorbik bnz .Lrdcont 2188282cd64SVasily Gorbik st %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # no ramdisk found 2198282cd64SVasily Gorbik.Lrdcont: 2208282cd64SVasily Gorbik l %r2,.Linitrd 2218282cd64SVasily Gorbik 2228282cd64SVasily Gorbik clc 0(3,%r2),.L_hdr # skip HDRx and EOFx 2238282cd64SVasily Gorbik bz .Lagain2 2248282cd64SVasily Gorbik clc 0(3,%r2),.L_eof 2258282cd64SVasily Gorbik bz .Lagain2 2268282cd64SVasily Gorbik 2278282cd64SVasily Gorbik# 2288282cd64SVasily Gorbik# reset files in VM reader 2298282cd64SVasily Gorbik# 2308282cd64SVasily Gorbik stidp .Lcpuid # store cpuid 2318282cd64SVasily Gorbik tm .Lcpuid,0xff # running VM ? 2328282cd64SVasily Gorbik bno .Lnoreset 2338282cd64SVasily Gorbik la %r2,.Lreset 2348282cd64SVasily Gorbik lhi %r3,26 2358282cd64SVasily Gorbik diag %r2,%r3,8 2368282cd64SVasily Gorbik la %r5,.Lirb 2378282cd64SVasily Gorbik stsch 0(%r5) # check if irq is pending 2388282cd64SVasily Gorbik tm 30(%r5),0x0f # by verifying if any of the 2398282cd64SVasily Gorbik bnz .Lwaitforirq # activity or status control 2408282cd64SVasily Gorbik tm 31(%r5),0xff # bits is set in the schib 2418282cd64SVasily Gorbik bz .Lnoreset 2428282cd64SVasily Gorbik.Lwaitforirq: 2438282cd64SVasily Gorbik bas %r14,.Lirqwait # wait for IO interrupt 2448282cd64SVasily Gorbik c %r1,__LC_SUBCHANNEL_ID # compare subchannel number 2458282cd64SVasily Gorbik bne .Lwaitforirq 2468282cd64SVasily Gorbik la %r5,.Lirb 2478282cd64SVasily Gorbik tsch 0(%r5) 2488282cd64SVasily Gorbik.Lnoreset: 2498282cd64SVasily Gorbik b .Lnoload 2508282cd64SVasily Gorbik 2518282cd64SVasily Gorbik# 2528282cd64SVasily Gorbik# everything loaded, go for it 2538282cd64SVasily Gorbik# 2548282cd64SVasily Gorbik.Lnoload: 2558282cd64SVasily Gorbik l %r1,.Lstartup 2568282cd64SVasily Gorbik br %r1 2578282cd64SVasily Gorbik 2588282cd64SVasily Gorbik.Linitrd:.long _end # default address of initrd 2598282cd64SVasily Gorbik.Lparm: .long PARMAREA 2608282cd64SVasily Gorbik.Lstartup: .long startup 2618282cd64SVasily Gorbik.Lreset:.byte 0xc3,0xc8,0xc1,0xd5,0xc7,0xc5,0x40,0xd9,0xc4,0xd9,0x40 2628282cd64SVasily Gorbik .byte 0xc1,0xd3,0xd3,0x40,0xd2,0xc5,0xc5,0xd7,0x40,0xd5,0xd6 2638282cd64SVasily Gorbik .byte 0xc8,0xd6,0xd3,0xc4 # "change rdr all keep nohold" 2648282cd64SVasily Gorbik.L_eof: .long 0xc5d6c600 /* C'EOF' */ 2658282cd64SVasily Gorbik.L_hdr: .long 0xc8c4d900 /* C'HDR' */ 2668282cd64SVasily Gorbik .align 8 2678282cd64SVasily Gorbik.Lcpuid:.fill 8,1,0 2688282cd64SVasily Gorbik 2698282cd64SVasily Gorbik# 2708b6bd6f2SAlexander Egorenkov# normal startup-code, running in absolute addressing mode 2718282cd64SVasily Gorbik# this is called either by the ipl loader or directly by PSW restart 2728282cd64SVasily Gorbik# or linload or SALIPL 2738282cd64SVasily Gorbik# 2748b6bd6f2SAlexander Egorenkov .org STARTUP_NORMAL_OFFSET 275ec55d1e1SVasily GorbikSYM_CODE_START(startup) 276ec55d1e1SVasily Gorbik j startup_normal 277627c9b62SVasily Gorbik .org EP_OFFSET 2788282cd64SVasily Gorbik# 2798282cd64SVasily Gorbik# This is a list of s390 kernel entry points. At address 0x1000f the number of 2808282cd64SVasily Gorbik# valid entry points is stored. 2818282cd64SVasily Gorbik# 2828282cd64SVasily Gorbik# IMPORTANT: Do not change this table, it is s390 kernel ABI! 2838282cd64SVasily Gorbik# 284627c9b62SVasily Gorbik .ascii EP_STRING 2858282cd64SVasily Gorbik .byte 0x00,0x01 2868282cd64SVasily Gorbik# 2878b6bd6f2SAlexander Egorenkov# kdump startup-code, running in 64 bit absolute addressing mode 2888282cd64SVasily Gorbik# 2898b6bd6f2SAlexander Egorenkov .org STARTUP_KDUMP_OFFSET 290ec55d1e1SVasily Gorbik j startup_kdump 291ec55d1e1SVasily GorbikSYM_CODE_END(startup) 292ec55d1e1SVasily GorbikSYM_CODE_START_LOCAL(startup_normal) 2938282cd64SVasily Gorbik mvi __LC_AR_MODE_ID,1 # set esame flag 2948282cd64SVasily Gorbik slr %r0,%r0 # set cpuid to zero 2958282cd64SVasily Gorbik lhi %r1,2 # mode 2 = esame (dump) 2968282cd64SVasily Gorbik sigp %r1,%r0,0x12 # switch to esame mode 2978282cd64SVasily Gorbik bras %r13,0f 2988282cd64SVasily Gorbik .fill 16,4,0x0 2998282cd64SVasily Gorbik0: lmh %r0,%r15,0(%r13) # clear high-order half of gprs 3008282cd64SVasily Gorbik sam64 # switch to 64 bit addressing mode 3018282cd64SVasily Gorbik basr %r13,0 # get base 3028282cd64SVasily Gorbik.LPG0: 30313b5bd8aSVasily Gorbik mvc __LC_EXT_NEW_PSW(16),.Lext_new_psw-.LPG0(%r13) 30413b5bd8aSVasily Gorbik mvc __LC_PGM_NEW_PSW(16),.Lpgm_new_psw-.LPG0(%r13) 30513b5bd8aSVasily Gorbik mvc __LC_IO_NEW_PSW(16),.Lio_new_psw-.LPG0(%r13) 3068282cd64SVasily Gorbik xc 0x200(256),0x200 # partially clear lowcore 3078282cd64SVasily Gorbik xc 0x300(256),0x300 3088282cd64SVasily Gorbik xc 0xe00(256),0xe00 3098282cd64SVasily Gorbik xc 0xf00(256),0xf00 310584315edSAlexander Gordeev lctlg %c0,%c15,.Lctl-.LPG0(%r13) # load control registers 3118282cd64SVasily Gorbik stcke __LC_BOOT_CLOCK 3128282cd64SVasily Gorbik mvc __LC_LAST_UPDATE_CLOCK(8),__LC_BOOT_CLOCK+1 3138282cd64SVasily Gorbik spt 6f-.LPG0(%r13) 3148282cd64SVasily Gorbik mvc __LC_LAST_UPDATE_TIMER(8),6f-.LPG0(%r13) 315256d78d0SAlexander Egorenkov larl %r15,_stack_end-STACK_FRAME_OVERHEAD 316f1d3c532SAlexander Egorenkov brasl %r14,sclp_early_setup_buffer 3178282cd64SVasily Gorbik brasl %r14,verify_facilities 3188f75582aSVasily Gorbik brasl %r14,startup_kernel 319ec55d1e1SVasily GorbikSYM_CODE_END(startup_normal) 3208282cd64SVasily Gorbik 3218282cd64SVasily Gorbik .align 8 3228282cd64SVasily Gorbik6: .long 0x7fffffff,0xffffffff 32313b5bd8aSVasily Gorbik.Lext_new_psw: 32413b5bd8aSVasily Gorbik .quad 0x0002000180000000,0x1b0 # disabled wait 32513b5bd8aSVasily Gorbik.Lpgm_new_psw: 32613b5bd8aSVasily Gorbik .quad 0x0000000180000000,startup_pgm_check_handler 32713b5bd8aSVasily Gorbik.Lio_new_psw: 32813b5bd8aSVasily Gorbik .quad 0x0002000180000000,0x1f0 # disabled wait 329584315edSAlexander Gordeev.Lctl: .quad 0x04040000 # cr0: AFP registers & secondary space 330584315edSAlexander Gordeev .quad 0 # cr1: primary space segment table 331584315edSAlexander Gordeev .quad 0 # cr2: dispatchable unit control table 332584315edSAlexander Gordeev .quad 0 # cr3: instruction authorization 333584315edSAlexander Gordeev .quad 0xffff # cr4: instruction authorization 334584315edSAlexander Gordeev .quad 0 # cr5: primary-aste origin 335584315edSAlexander Gordeev .quad 0 # cr6: I/O interrupts 336584315edSAlexander Gordeev .quad 0 # cr7: secondary space segment table 337584315edSAlexander Gordeev .quad 0x0000000000008000 # cr8: access registers translation 338584315edSAlexander Gordeev .quad 0 # cr9: tracing off 339584315edSAlexander Gordeev .quad 0 # cr10: tracing off 340584315edSAlexander Gordeev .quad 0 # cr11: tracing off 341584315edSAlexander Gordeev .quad 0 # cr12: tracing off 342584315edSAlexander Gordeev .quad 0 # cr13: home space segment table 343584315edSAlexander Gordeev .quad 0xc0000000 # cr14: machine check handling off 344584315edSAlexander Gordeev .quad 0 # cr15: linkage stack operations 345a80313ffSGerald Schaefer 3468282cd64SVasily Gorbik#include "head_kdump.S" 3478282cd64SVasily Gorbik 3488282cd64SVasily Gorbik# 349da9ed30dSVasily Gorbik# This program check is active immediately after kernel start 350da9ed30dSVasily Gorbik# and until early_pgm_check_handler is set in kernel/early.c 351da9ed30dSVasily Gorbik# It simply saves general/control registers and psw in 352da9ed30dSVasily Gorbik# the save area and does disabled wait with a faulty address. 353da9ed30dSVasily Gorbik# 354ec55d1e1SVasily GorbikSYM_CODE_START_LOCAL(startup_pgm_check_handler) 3552835c2eaSVasily Gorbik stmg %r8,%r15,__LC_SAVE_AREA_SYNC 3562835c2eaSVasily Gorbik la %r8,4095 3572835c2eaSVasily Gorbik stctg %c0,%c15,__LC_CREGS_SAVE_AREA-4095(%r8) 3582835c2eaSVasily Gorbik stmg %r0,%r7,__LC_GPREGS_SAVE_AREA-4095(%r8) 3592835c2eaSVasily Gorbik mvc __LC_GPREGS_SAVE_AREA-4095+64(64,%r8),__LC_SAVE_AREA_SYNC 3602835c2eaSVasily Gorbik mvc __LC_PSW_SAVE_AREA-4095(16,%r8),__LC_PGM_OLD_PSW 361da9ed30dSVasily Gorbik mvc __LC_RETURN_PSW(16),__LC_PGM_OLD_PSW 362da9ed30dSVasily Gorbik ni __LC_RETURN_PSW,0xfc # remove IO and EX bits 363da9ed30dSVasily Gorbik ni __LC_RETURN_PSW+1,0xfb # remove MCHK bit 364da9ed30dSVasily Gorbik oi __LC_RETURN_PSW+1,0x2 # set wait state bit 3652835c2eaSVasily Gorbik larl %r9,.Lold_psw_disabled_wait 3662835c2eaSVasily Gorbik stg %r9,__LC_PGM_NEW_PSW+8 367256d78d0SAlexander Egorenkov larl %r15,_dump_info_stack_end-STACK_FRAME_OVERHEAD 368724dc336SVasily Gorbik brasl %r14,print_pgm_check_info 369724dc336SVasily Gorbik.Lold_psw_disabled_wait: 3702835c2eaSVasily Gorbik la %r8,4095 3712835c2eaSVasily Gorbik lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r8) 372da9ed30dSVasily Gorbik lpswe __LC_RETURN_PSW # disabled wait 373ec55d1e1SVasily GorbikSYM_CODE_END(startup_pgm_check_handler) 374da9ed30dSVasily Gorbik 375da9ed30dSVasily Gorbik# 3768282cd64SVasily Gorbik# params at 10400 (setup.h) 377d0d249d7SPhilipp Rudo# Must be keept in sync with struct parmarea in setup.h 3788282cd64SVasily Gorbik# 3798282cd64SVasily Gorbik .org PARMAREA 380f73c632dSHeiko CarstensSYM_DATA_START(parmarea) 381d0d249d7SPhilipp Rudo .quad 0 # IPL_DEVICE 382d0d249d7SPhilipp Rudo .quad 0 # INITRD_START 383d0d249d7SPhilipp Rudo .quad 0 # INITRD_SIZE 384d0d249d7SPhilipp Rudo .quad 0 # OLDMEM_BASE 385d0d249d7SPhilipp Rudo .quad 0 # OLDMEM_SIZE 3866abe2819SVasily Gorbik .quad kernel_version # points to kernel version string 3875ecb2da6SSven Schnelle .quad COMMAND_LINE_SIZE 3888282cd64SVasily Gorbik 3898282cd64SVasily Gorbik .org COMMAND_LINE 3908282cd64SVasily Gorbik .byte "root=/dev/ram0 ro" 3918282cd64SVasily Gorbik .byte 0 392f73c632dSHeiko Carstens .org PARMAREA+__PARMAREA_SIZE 393f73c632dSHeiko CarstensSYM_DATA_END(parmarea) 394