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 * Heiko Carstens <heiko.carstens@de.ibm.com> 98282cd64SVasily Gorbik * 108282cd64SVasily Gorbik * There are 5 different IPL methods 118282cd64SVasily Gorbik * 1) load the image directly into ram at address 0 and do an PSW restart 128282cd64SVasily Gorbik * 2) linload will load the image from address 0x10000 to memory 0x10000 138282cd64SVasily Gorbik * and start the code thru LPSW 0x0008000080010000 (VM only, deprecated) 148282cd64SVasily Gorbik * 3) generate the tape ipl header, store the generated image on a tape 158282cd64SVasily Gorbik * and ipl from it 168282cd64SVasily Gorbik * In case of SL tape you need to IPL 5 times to get past VOL1 etc 178282cd64SVasily Gorbik * 4) generate the vm reader ipl header, move the generated image to the 188282cd64SVasily Gorbik * VM reader (use option NOH!) and do a ipl from reader (VM only) 198282cd64SVasily Gorbik * 5) direct call of start by the SALIPL loader 208282cd64SVasily Gorbik * We use the cpuid to distinguish between VM and native ipl 218282cd64SVasily Gorbik * params for kernel are pushed to 0x10400 (see setup.h) 228282cd64SVasily Gorbik * 238282cd64SVasily Gorbik */ 248282cd64SVasily Gorbik 258282cd64SVasily Gorbik#include <linux/init.h> 268282cd64SVasily Gorbik#include <linux/linkage.h> 278282cd64SVasily Gorbik#include <asm/asm-offsets.h> 288282cd64SVasily Gorbik#include <asm/page.h> 298282cd64SVasily Gorbik#include <asm/ptrace.h> 300029b4d1SAlexander Egorenkov#include <asm/sclp.h> 318282cd64SVasily Gorbik 328282cd64SVasily Gorbik#define ARCH_OFFSET 4 338282cd64SVasily Gorbik 346a24d466SAlexander Egorenkov#define EP_OFFSET 0x10008 356a24d466SAlexander Egorenkov#define EP_STRING "S390EP" 366a24d466SAlexander Egorenkov 378282cd64SVasily Gorbik__HEAD 388282cd64SVasily Gorbik 398282cd64SVasily Gorbik#define IPL_BS 0x730 408282cd64SVasily Gorbik .org 0 418282cd64SVasily Gorbik .long 0x00080000,0x80000000+iplstart # The first 24 bytes are loaded 428282cd64SVasily Gorbik .long 0x02000018,0x60000050 # by ipl to addresses 0-23. 438282cd64SVasily Gorbik .long 0x02000068,0x60000050 # (a PSW and two CCWs). 448282cd64SVasily Gorbik .fill 80-24,1,0x40 # bytes 24-79 are discarded !! 458282cd64SVasily Gorbik .long 0x020000f0,0x60000050 # The next 160 byte are loaded 468282cd64SVasily Gorbik .long 0x02000140,0x60000050 # to addresses 0x18-0xb7 478282cd64SVasily Gorbik .long 0x02000190,0x60000050 # They form the continuation 488282cd64SVasily Gorbik .long 0x020001e0,0x60000050 # of the CCW program started 498282cd64SVasily Gorbik .long 0x02000230,0x60000050 # by ipl and load the range 508282cd64SVasily Gorbik .long 0x02000280,0x60000050 # 0x0f0-0x730 from the image 518282cd64SVasily Gorbik .long 0x020002d0,0x60000050 # to the range 0x0f0-0x730 528282cd64SVasily Gorbik .long 0x02000320,0x60000050 # in memory. At the end of 538282cd64SVasily Gorbik .long 0x02000370,0x60000050 # the channel program the PSW 548282cd64SVasily Gorbik .long 0x020003c0,0x60000050 # at location 0 is loaded. 558282cd64SVasily Gorbik .long 0x02000410,0x60000050 # Initial processing starts 568282cd64SVasily Gorbik .long 0x02000460,0x60000050 # at 0x200 = iplstart. 578282cd64SVasily Gorbik .long 0x020004b0,0x60000050 588282cd64SVasily Gorbik .long 0x02000500,0x60000050 598282cd64SVasily Gorbik .long 0x02000550,0x60000050 608282cd64SVasily Gorbik .long 0x020005a0,0x60000050 618282cd64SVasily Gorbik .long 0x020005f0,0x60000050 628282cd64SVasily Gorbik .long 0x02000640,0x60000050 638282cd64SVasily Gorbik .long 0x02000690,0x60000050 648282cd64SVasily Gorbik .long 0x020006e0,0x20000050 658282cd64SVasily Gorbik 66da9ed30dSVasily Gorbik .org __LC_RST_NEW_PSW # 0x1a0 678e5a7627SMartin Schwidefsky .quad 0,iplstart 6813b5bd8aSVasily Gorbik .org __LC_EXT_NEW_PSW # 0x1b0 6913b5bd8aSVasily Gorbik .quad 0x0002000180000000,0x1b0 # disabled wait 70da9ed30dSVasily Gorbik .org __LC_PGM_NEW_PSW # 0x1d0 71da9ed30dSVasily Gorbik .quad 0x0000000180000000,startup_pgm_check_handler 7213b5bd8aSVasily Gorbik .org __LC_IO_NEW_PSW # 0x1f0 7313b5bd8aSVasily Gorbik .quad 0x0002000180000000,0x1f0 # disabled wait 748e5a7627SMartin Schwidefsky 758282cd64SVasily Gorbik .org 0x200 768282cd64SVasily Gorbik 778282cd64SVasily Gorbik# 788282cd64SVasily Gorbik# subroutine to wait for end I/O 798282cd64SVasily Gorbik# 808282cd64SVasily Gorbik.Lirqwait: 818282cd64SVasily Gorbik mvc __LC_IO_NEW_PSW(16),.Lnewpsw # set up IO interrupt psw 828282cd64SVasily Gorbik lpsw .Lwaitpsw 838282cd64SVasily Gorbik.Lioint: 848282cd64SVasily Gorbik br %r14 858282cd64SVasily Gorbik .align 8 868282cd64SVasily Gorbik.Lnewpsw: 878282cd64SVasily Gorbik .quad 0x0000000080000000,.Lioint 888282cd64SVasily Gorbik.Lwaitpsw: 898282cd64SVasily Gorbik .long 0x020a0000,0x80000000+.Lioint 908282cd64SVasily Gorbik 918282cd64SVasily Gorbik# 928282cd64SVasily Gorbik# subroutine for loading cards from the reader 938282cd64SVasily Gorbik# 948282cd64SVasily Gorbik.Lloader: 958282cd64SVasily Gorbik la %r4,0(%r14) 968282cd64SVasily Gorbik la %r3,.Lorb # r2 = address of orb into r2 978282cd64SVasily Gorbik la %r5,.Lirb # r4 = address of irb 988282cd64SVasily Gorbik la %r6,.Lccws 998282cd64SVasily Gorbik la %r7,20 1008282cd64SVasily Gorbik.Linit: 1018282cd64SVasily Gorbik st %r2,4(%r6) # initialize CCW data addresses 1028282cd64SVasily Gorbik la %r2,0x50(%r2) 1038282cd64SVasily Gorbik la %r6,8(%r6) 1048282cd64SVasily Gorbik bct 7,.Linit 1058282cd64SVasily Gorbik 1068282cd64SVasily Gorbik lctl %c6,%c6,.Lcr6 # set IO subclass mask 1078282cd64SVasily Gorbik slr %r2,%r2 1088282cd64SVasily Gorbik.Lldlp: 1098282cd64SVasily Gorbik ssch 0(%r3) # load chunk of 1600 bytes 1108282cd64SVasily Gorbik bnz .Llderr 1118282cd64SVasily Gorbik.Lwait4irq: 1128282cd64SVasily Gorbik bas %r14,.Lirqwait 1138282cd64SVasily Gorbik c %r1,__LC_SUBCHANNEL_ID # compare subchannel number 1148282cd64SVasily Gorbik bne .Lwait4irq 1158282cd64SVasily Gorbik tsch 0(%r5) 1168282cd64SVasily Gorbik 1178282cd64SVasily Gorbik slr %r0,%r0 1188282cd64SVasily Gorbik ic %r0,8(%r5) # get device status 1198282cd64SVasily Gorbik chi %r0,8 # channel end ? 1208282cd64SVasily Gorbik be .Lcont 1218282cd64SVasily Gorbik chi %r0,12 # channel end + device end ? 1228282cd64SVasily Gorbik be .Lcont 1238282cd64SVasily Gorbik 1248282cd64SVasily Gorbik l %r0,4(%r5) 1258282cd64SVasily Gorbik s %r0,8(%r3) # r0/8 = number of ccws executed 1268282cd64SVasily Gorbik mhi %r0,10 # *10 = number of bytes in ccws 1278282cd64SVasily Gorbik lh %r3,10(%r5) # get residual count 1288282cd64SVasily Gorbik sr %r0,%r3 # #ccws*80-residual=#bytes read 1298282cd64SVasily Gorbik ar %r2,%r0 1308282cd64SVasily Gorbik 1318282cd64SVasily Gorbik br %r4 # r2 contains the total size 1328282cd64SVasily Gorbik 1338282cd64SVasily Gorbik.Lcont: 1348282cd64SVasily Gorbik ahi %r2,0x640 # add 0x640 to total size 1358282cd64SVasily Gorbik la %r6,.Lccws 1368282cd64SVasily Gorbik la %r7,20 1378282cd64SVasily Gorbik.Lincr: 1388282cd64SVasily Gorbik l %r0,4(%r6) # update CCW data addresses 1398282cd64SVasily Gorbik ahi %r0,0x640 1408282cd64SVasily Gorbik st %r0,4(%r6) 1418282cd64SVasily Gorbik ahi %r6,8 1428282cd64SVasily Gorbik bct 7,.Lincr 1438282cd64SVasily Gorbik 1448282cd64SVasily Gorbik b .Lldlp 1458282cd64SVasily Gorbik.Llderr: 1468282cd64SVasily Gorbik lpsw .Lcrash 1478282cd64SVasily Gorbik 1488282cd64SVasily Gorbik .align 8 1498282cd64SVasily Gorbik.Lorb: .long 0x00000000,0x0080ff00,.Lccws 1508282cd64SVasily Gorbik.Lirb: .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 1518282cd64SVasily Gorbik.Lcr6: .long 0xff000000 1528282cd64SVasily Gorbik.Lloadp:.long 0,0 1538282cd64SVasily Gorbik .align 8 1548282cd64SVasily Gorbik.Lcrash:.long 0x000a0000,0x00000000 1558282cd64SVasily Gorbik 1568282cd64SVasily Gorbik .align 8 1578282cd64SVasily Gorbik.Lccws: .rept 19 1588282cd64SVasily Gorbik .long 0x02600050,0x00000000 1598282cd64SVasily Gorbik .endr 1608282cd64SVasily Gorbik .long 0x02200050,0x00000000 1618282cd64SVasily Gorbik 1628282cd64SVasily Gorbikiplstart: 1638282cd64SVasily Gorbik mvi __LC_AR_MODE_ID,1 # set esame flag 1648282cd64SVasily Gorbik slr %r0,%r0 # set cpuid to zero 1658282cd64SVasily Gorbik lhi %r1,2 # mode 2 = esame (dump) 1668282cd64SVasily Gorbik sigp %r1,%r0,0x12 # switch to esame mode 1678282cd64SVasily Gorbik bras %r13,0f 1688282cd64SVasily Gorbik .fill 16,4,0x0 1698282cd64SVasily Gorbik0: lmh %r0,%r15,0(%r13) # clear high-order half of gprs 1708282cd64SVasily Gorbik sam31 # switch to 31 bit addressing mode 1718282cd64SVasily Gorbik lh %r1,__LC_SUBCHANNEL_ID # test if subchannel number 1728282cd64SVasily Gorbik bct %r1,.Lnoload # is valid 1738282cd64SVasily Gorbik l %r1,__LC_SUBCHANNEL_ID # load ipl subchannel number 1748282cd64SVasily Gorbik la %r2,IPL_BS # load start address 1758282cd64SVasily Gorbik bas %r14,.Lloader # load rest of ipl image 1768282cd64SVasily Gorbik l %r12,.Lparm # pointer to parameter area 1778282cd64SVasily Gorbik st %r1,IPL_DEVICE+ARCH_OFFSET-PARMAREA(%r12) # save ipl device number 1788282cd64SVasily Gorbik 1798282cd64SVasily Gorbik# 1808282cd64SVasily Gorbik# load parameter file from ipl device 1818282cd64SVasily Gorbik# 1828282cd64SVasily Gorbik.Lagain1: 1838282cd64SVasily Gorbik l %r2,.Linitrd # ramdisk loc. is temp 1848282cd64SVasily Gorbik bas %r14,.Lloader # load parameter file 1858282cd64SVasily Gorbik ltr %r2,%r2 # got anything ? 1868282cd64SVasily Gorbik bz .Lnopf 1878282cd64SVasily Gorbik chi %r2,895 1888282cd64SVasily Gorbik bnh .Lnotrunc 1898282cd64SVasily Gorbik la %r2,895 1908282cd64SVasily Gorbik.Lnotrunc: 1918282cd64SVasily Gorbik l %r4,.Linitrd 1928282cd64SVasily Gorbik clc 0(3,%r4),.L_hdr # if it is HDRx 1938282cd64SVasily Gorbik bz .Lagain1 # skip dataset header 1948282cd64SVasily Gorbik clc 0(3,%r4),.L_eof # if it is EOFx 1958282cd64SVasily Gorbik bz .Lagain1 # skip dateset trailer 1968282cd64SVasily Gorbik la %r5,0(%r4,%r2) 1978282cd64SVasily Gorbik lr %r3,%r2 1988282cd64SVasily Gorbik la %r3,COMMAND_LINE-PARMAREA(%r12) # load adr. of command line 1998282cd64SVasily Gorbik mvc 0(256,%r3),0(%r4) 2008282cd64SVasily Gorbik mvc 256(256,%r3),256(%r4) 2018282cd64SVasily Gorbik mvc 512(256,%r3),512(%r4) 2028282cd64SVasily Gorbik mvc 768(122,%r3),768(%r4) 2038282cd64SVasily Gorbik slr %r0,%r0 2048282cd64SVasily Gorbik b .Lcntlp 2058282cd64SVasily Gorbik.Ldelspc: 2068282cd64SVasily Gorbik ic %r0,0(%r2,%r3) 2078282cd64SVasily Gorbik chi %r0,0x20 # is it a space ? 2088282cd64SVasily Gorbik be .Lcntlp 2098282cd64SVasily Gorbik ahi %r2,1 2108282cd64SVasily Gorbik b .Leolp 2118282cd64SVasily Gorbik.Lcntlp: 2128282cd64SVasily Gorbik brct %r2,.Ldelspc 2138282cd64SVasily Gorbik.Leolp: 2148282cd64SVasily Gorbik slr %r0,%r0 2158282cd64SVasily Gorbik stc %r0,0(%r2,%r3) # terminate buffer 2168282cd64SVasily Gorbik.Lnopf: 2178282cd64SVasily Gorbik 2188282cd64SVasily Gorbik# 2198282cd64SVasily Gorbik# load ramdisk from ipl device 2208282cd64SVasily Gorbik# 2218282cd64SVasily Gorbik.Lagain2: 2228282cd64SVasily Gorbik l %r2,.Linitrd # addr of ramdisk 2238282cd64SVasily Gorbik st %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) 2248282cd64SVasily Gorbik bas %r14,.Lloader # load ramdisk 2258282cd64SVasily Gorbik st %r2,INITRD_SIZE+ARCH_OFFSET-PARMAREA(%r12) # store size of rd 2268282cd64SVasily Gorbik ltr %r2,%r2 2278282cd64SVasily Gorbik bnz .Lrdcont 2288282cd64SVasily Gorbik st %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # no ramdisk found 2298282cd64SVasily Gorbik.Lrdcont: 2308282cd64SVasily Gorbik l %r2,.Linitrd 2318282cd64SVasily Gorbik 2328282cd64SVasily Gorbik clc 0(3,%r2),.L_hdr # skip HDRx and EOFx 2338282cd64SVasily Gorbik bz .Lagain2 2348282cd64SVasily Gorbik clc 0(3,%r2),.L_eof 2358282cd64SVasily Gorbik bz .Lagain2 2368282cd64SVasily Gorbik 2378282cd64SVasily Gorbik# 2388282cd64SVasily Gorbik# reset files in VM reader 2398282cd64SVasily Gorbik# 2408282cd64SVasily Gorbik stidp .Lcpuid # store cpuid 2418282cd64SVasily Gorbik tm .Lcpuid,0xff # running VM ? 2428282cd64SVasily Gorbik bno .Lnoreset 2438282cd64SVasily Gorbik la %r2,.Lreset 2448282cd64SVasily Gorbik lhi %r3,26 2458282cd64SVasily Gorbik diag %r2,%r3,8 2468282cd64SVasily Gorbik la %r5,.Lirb 2478282cd64SVasily Gorbik stsch 0(%r5) # check if irq is pending 2488282cd64SVasily Gorbik tm 30(%r5),0x0f # by verifying if any of the 2498282cd64SVasily Gorbik bnz .Lwaitforirq # activity or status control 2508282cd64SVasily Gorbik tm 31(%r5),0xff # bits is set in the schib 2518282cd64SVasily Gorbik bz .Lnoreset 2528282cd64SVasily Gorbik.Lwaitforirq: 2538282cd64SVasily Gorbik bas %r14,.Lirqwait # wait for IO interrupt 2548282cd64SVasily Gorbik c %r1,__LC_SUBCHANNEL_ID # compare subchannel number 2558282cd64SVasily Gorbik bne .Lwaitforirq 2568282cd64SVasily Gorbik la %r5,.Lirb 2578282cd64SVasily Gorbik tsch 0(%r5) 2588282cd64SVasily Gorbik.Lnoreset: 2598282cd64SVasily Gorbik b .Lnoload 2608282cd64SVasily Gorbik 2618282cd64SVasily Gorbik# 2628282cd64SVasily Gorbik# everything loaded, go for it 2638282cd64SVasily Gorbik# 2648282cd64SVasily Gorbik.Lnoload: 2658282cd64SVasily Gorbik l %r1,.Lstartup 2668282cd64SVasily Gorbik br %r1 2678282cd64SVasily Gorbik 2688282cd64SVasily Gorbik.Linitrd:.long _end # default address of initrd 2698282cd64SVasily Gorbik.Lparm: .long PARMAREA 2708282cd64SVasily Gorbik.Lstartup: .long startup 2718282cd64SVasily Gorbik.Lreset:.byte 0xc3,0xc8,0xc1,0xd5,0xc7,0xc5,0x40,0xd9,0xc4,0xd9,0x40 2728282cd64SVasily Gorbik .byte 0xc1,0xd3,0xd3,0x40,0xd2,0xc5,0xc5,0xd7,0x40,0xd5,0xd6 2738282cd64SVasily Gorbik .byte 0xc8,0xd6,0xd3,0xc4 # "change rdr all keep nohold" 2748282cd64SVasily Gorbik.L_eof: .long 0xc5d6c600 /* C'EOF' */ 2758282cd64SVasily Gorbik.L_hdr: .long 0xc8c4d900 /* C'HDR' */ 2768282cd64SVasily Gorbik .align 8 2778282cd64SVasily Gorbik.Lcpuid:.fill 8,1,0 2788282cd64SVasily Gorbik 2798282cd64SVasily Gorbik# 2808b6bd6f2SAlexander Egorenkov# normal startup-code, running in absolute addressing mode 2818282cd64SVasily Gorbik# this is called either by the ipl loader or directly by PSW restart 2828282cd64SVasily Gorbik# or linload or SALIPL 2838282cd64SVasily Gorbik# 2848b6bd6f2SAlexander Egorenkov .org STARTUP_NORMAL_OFFSET 285ec55d1e1SVasily GorbikSYM_CODE_START(startup) 286ec55d1e1SVasily Gorbik j startup_normal 287627c9b62SVasily Gorbik .org EP_OFFSET 2888282cd64SVasily Gorbik# 2898282cd64SVasily Gorbik# This is a list of s390 kernel entry points. At address 0x1000f the number of 2908282cd64SVasily Gorbik# valid entry points is stored. 2918282cd64SVasily Gorbik# 2928282cd64SVasily Gorbik# IMPORTANT: Do not change this table, it is s390 kernel ABI! 2938282cd64SVasily Gorbik# 294627c9b62SVasily Gorbik .ascii EP_STRING 2958282cd64SVasily Gorbik .byte 0x00,0x01 2968282cd64SVasily Gorbik# 2978b6bd6f2SAlexander Egorenkov# kdump startup-code, running in 64 bit absolute addressing mode 2988282cd64SVasily Gorbik# 2998b6bd6f2SAlexander Egorenkov .org STARTUP_KDUMP_OFFSET 300ec55d1e1SVasily Gorbik j startup_kdump 301ec55d1e1SVasily GorbikSYM_CODE_END(startup) 302ec55d1e1SVasily GorbikSYM_CODE_START_LOCAL(startup_normal) 3038282cd64SVasily Gorbik mvi __LC_AR_MODE_ID,1 # set esame flag 3048282cd64SVasily Gorbik slr %r0,%r0 # set cpuid to zero 3058282cd64SVasily Gorbik lhi %r1,2 # mode 2 = esame (dump) 3068282cd64SVasily Gorbik sigp %r1,%r0,0x12 # switch to esame mode 3078282cd64SVasily Gorbik bras %r13,0f 3088282cd64SVasily Gorbik .fill 16,4,0x0 3098282cd64SVasily Gorbik0: lmh %r0,%r15,0(%r13) # clear high-order half of gprs 3108282cd64SVasily Gorbik sam64 # switch to 64 bit addressing mode 3118282cd64SVasily Gorbik basr %r13,0 # get base 3128282cd64SVasily Gorbik.LPG0: 31313b5bd8aSVasily Gorbik mvc __LC_EXT_NEW_PSW(16),.Lext_new_psw-.LPG0(%r13) 31413b5bd8aSVasily Gorbik mvc __LC_PGM_NEW_PSW(16),.Lpgm_new_psw-.LPG0(%r13) 31513b5bd8aSVasily Gorbik mvc __LC_IO_NEW_PSW(16),.Lio_new_psw-.LPG0(%r13) 3168282cd64SVasily Gorbik xc 0x200(256),0x200 # partially clear lowcore 3178282cd64SVasily Gorbik xc 0x300(256),0x300 3188282cd64SVasily Gorbik xc 0xe00(256),0xe00 3198282cd64SVasily Gorbik xc 0xf00(256),0xf00 320*584315edSAlexander Gordeev lctlg %c0,%c15,.Lctl-.LPG0(%r13) # load control registers 3218282cd64SVasily Gorbik stcke __LC_BOOT_CLOCK 3228282cd64SVasily Gorbik mvc __LC_LAST_UPDATE_CLOCK(8),__LC_BOOT_CLOCK+1 3238282cd64SVasily Gorbik spt 6f-.LPG0(%r13) 3248282cd64SVasily Gorbik mvc __LC_LAST_UPDATE_TIMER(8),6f-.LPG0(%r13) 325256d78d0SAlexander Egorenkov larl %r15,_stack_end-STACK_FRAME_OVERHEAD 326f1d3c532SAlexander Egorenkov brasl %r14,sclp_early_setup_buffer 3278282cd64SVasily Gorbik brasl %r14,verify_facilities 3288f75582aSVasily Gorbik brasl %r14,startup_kernel 329ec55d1e1SVasily GorbikSYM_CODE_END(startup_normal) 3308282cd64SVasily Gorbik 3318282cd64SVasily Gorbik .align 8 3328282cd64SVasily Gorbik6: .long 0x7fffffff,0xffffffff 33313b5bd8aSVasily Gorbik.Lext_new_psw: 33413b5bd8aSVasily Gorbik .quad 0x0002000180000000,0x1b0 # disabled wait 33513b5bd8aSVasily Gorbik.Lpgm_new_psw: 33613b5bd8aSVasily Gorbik .quad 0x0000000180000000,startup_pgm_check_handler 33713b5bd8aSVasily Gorbik.Lio_new_psw: 33813b5bd8aSVasily Gorbik .quad 0x0002000180000000,0x1f0 # disabled wait 339*584315edSAlexander Gordeev.Lctl: .quad 0x04040000 # cr0: AFP registers & secondary space 340*584315edSAlexander Gordeev .quad 0 # cr1: primary space segment table 341*584315edSAlexander Gordeev .quad 0 # cr2: dispatchable unit control table 342*584315edSAlexander Gordeev .quad 0 # cr3: instruction authorization 343*584315edSAlexander Gordeev .quad 0xffff # cr4: instruction authorization 344*584315edSAlexander Gordeev .quad 0 # cr5: primary-aste origin 345*584315edSAlexander Gordeev .quad 0 # cr6: I/O interrupts 346*584315edSAlexander Gordeev .quad 0 # cr7: secondary space segment table 347*584315edSAlexander Gordeev .quad 0x0000000000008000 # cr8: access registers translation 348*584315edSAlexander Gordeev .quad 0 # cr9: tracing off 349*584315edSAlexander Gordeev .quad 0 # cr10: tracing off 350*584315edSAlexander Gordeev .quad 0 # cr11: tracing off 351*584315edSAlexander Gordeev .quad 0 # cr12: tracing off 352*584315edSAlexander Gordeev .quad 0 # cr13: home space segment table 353*584315edSAlexander Gordeev .quad 0xc0000000 # cr14: machine check handling off 354*584315edSAlexander Gordeev .quad 0 # cr15: linkage stack operations 355a80313ffSGerald Schaefer 3568282cd64SVasily Gorbik#include "head_kdump.S" 3578282cd64SVasily Gorbik 3588282cd64SVasily Gorbik# 359da9ed30dSVasily Gorbik# This program check is active immediately after kernel start 360da9ed30dSVasily Gorbik# and until early_pgm_check_handler is set in kernel/early.c 361da9ed30dSVasily Gorbik# It simply saves general/control registers and psw in 362da9ed30dSVasily Gorbik# the save area and does disabled wait with a faulty address. 363da9ed30dSVasily Gorbik# 364ec55d1e1SVasily GorbikSYM_CODE_START_LOCAL(startup_pgm_check_handler) 3652835c2eaSVasily Gorbik stmg %r8,%r15,__LC_SAVE_AREA_SYNC 3662835c2eaSVasily Gorbik la %r8,4095 3672835c2eaSVasily Gorbik stctg %c0,%c15,__LC_CREGS_SAVE_AREA-4095(%r8) 3682835c2eaSVasily Gorbik stmg %r0,%r7,__LC_GPREGS_SAVE_AREA-4095(%r8) 3692835c2eaSVasily Gorbik mvc __LC_GPREGS_SAVE_AREA-4095+64(64,%r8),__LC_SAVE_AREA_SYNC 3702835c2eaSVasily Gorbik mvc __LC_PSW_SAVE_AREA-4095(16,%r8),__LC_PGM_OLD_PSW 371da9ed30dSVasily Gorbik mvc __LC_RETURN_PSW(16),__LC_PGM_OLD_PSW 372da9ed30dSVasily Gorbik ni __LC_RETURN_PSW,0xfc # remove IO and EX bits 373da9ed30dSVasily Gorbik ni __LC_RETURN_PSW+1,0xfb # remove MCHK bit 374da9ed30dSVasily Gorbik oi __LC_RETURN_PSW+1,0x2 # set wait state bit 3752835c2eaSVasily Gorbik larl %r9,.Lold_psw_disabled_wait 3762835c2eaSVasily Gorbik stg %r9,__LC_PGM_NEW_PSW+8 377256d78d0SAlexander Egorenkov larl %r15,_dump_info_stack_end-STACK_FRAME_OVERHEAD 378724dc336SVasily Gorbik brasl %r14,print_pgm_check_info 379724dc336SVasily Gorbik.Lold_psw_disabled_wait: 3802835c2eaSVasily Gorbik la %r8,4095 3812835c2eaSVasily Gorbik lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r8) 382da9ed30dSVasily Gorbik lpswe __LC_RETURN_PSW # disabled wait 383ec55d1e1SVasily GorbikSYM_CODE_END(startup_pgm_check_handler) 384da9ed30dSVasily Gorbik 385da9ed30dSVasily Gorbik# 3868282cd64SVasily Gorbik# params at 10400 (setup.h) 387d0d249d7SPhilipp Rudo# Must be keept in sync with struct parmarea in setup.h 3888282cd64SVasily Gorbik# 3898282cd64SVasily Gorbik .org PARMAREA 390f73c632dSHeiko CarstensSYM_DATA_START(parmarea) 391d0d249d7SPhilipp Rudo .quad 0 # IPL_DEVICE 392d0d249d7SPhilipp Rudo .quad 0 # INITRD_START 393d0d249d7SPhilipp Rudo .quad 0 # INITRD_SIZE 394d0d249d7SPhilipp Rudo .quad 0 # OLDMEM_BASE 395d0d249d7SPhilipp Rudo .quad 0 # OLDMEM_SIZE 3966abe2819SVasily Gorbik .quad kernel_version # points to kernel version string 3978282cd64SVasily Gorbik 3988282cd64SVasily Gorbik .org COMMAND_LINE 3998282cd64SVasily Gorbik .byte "root=/dev/ram0 ro" 4008282cd64SVasily Gorbik .byte 0 401f73c632dSHeiko Carstens .org PARMAREA+__PARMAREA_SIZE 402f73c632dSHeiko CarstensSYM_DATA_END(parmarea) 4038282cd64SVasily Gorbik 404087c4d74SGerald Schaefer .org HEAD_END 405