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> 30834979c2SHeiko Carstens#include "boot.h" 318282cd64SVasily Gorbik 326a24d466SAlexander Egorenkov#define EP_OFFSET 0x10008 336a24d466SAlexander Egorenkov#define EP_STRING "S390EP" 34834979c2SHeiko Carstens#define IPL_BS 0x730 3573475797SHeiko Carstens 368282cd64SVasily Gorbik__HEAD 3773475797SHeiko Carstensipl_start: 3894d34778SHeiko Carstens mvi __LC_AR_MODE_ID,1 # set esame flag 3994d34778SHeiko Carstens slr %r0,%r0 # set cpuid to zero 4094d34778SHeiko Carstens lhi %r1,2 # mode 2 = esame (dump) 4194d34778SHeiko Carstens sigp %r1,%r0,0x12 # switch to esame mode 4294d34778SHeiko Carstens sam64 # switch to 64 bit addressing mode 4394d34778SHeiko Carstens lgh %r1,__LC_SUBCHANNEL_ID # test if subchannel number 4494d34778SHeiko Carstens brctg %r1,.Lnoload # is valid 4594d34778SHeiko Carstens llgf %r1,__LC_SUBCHANNEL_ID # load ipl subchannel number 4694d34778SHeiko Carstens lghi %r2,IPL_BS # load start address 4794d34778SHeiko Carstens bras %r14,.Lloader # load rest of ipl image 4894d34778SHeiko Carstens larl %r12,parmarea # pointer to parameter area 4994d34778SHeiko Carstens stg %r1,IPL_DEVICE-PARMAREA(%r12) # save ipl device number 5094d34778SHeiko Carstens# 5194d34778SHeiko Carstens# load parameter file from ipl device 5294d34778SHeiko Carstens# 5394d34778SHeiko Carstens.Lagain1: 5494d34778SHeiko Carstens larl %r2,_end # ramdisk loc. is temp 5594d34778SHeiko Carstens bras %r14,.Lloader # load parameter file 5694d34778SHeiko Carstens ltgr %r2,%r2 # got anything ? 5794d34778SHeiko Carstens jz .Lnopf 5894d34778SHeiko Carstens lg %r3,MAX_COMMAND_LINE_SIZE-PARMAREA(%r12) 5994d34778SHeiko Carstens aghi %r3,-1 6094d34778SHeiko Carstens clgr %r2,%r3 6194d34778SHeiko Carstens jl .Lnotrunc 6294d34778SHeiko Carstens lgr %r2,%r3 6394d34778SHeiko Carstens.Lnotrunc: 6494d34778SHeiko Carstens larl %r4,_end 6594d34778SHeiko Carstens larl %r13,.L_hdr 6694d34778SHeiko Carstens clc 0(3,%r4),0(%r13) # if it is HDRx 6794d34778SHeiko Carstens jz .Lagain1 # skip dataset header 6894d34778SHeiko Carstens larl %r13,.L_eof 6994d34778SHeiko Carstens clc 0(3,%r4),0(%r13) # if it is EOFx 70*cada938aSHeiko Carstens jz .Lagain1 # skip data set trailer 7194d34778SHeiko Carstens lgr %r5,%r2 7294d34778SHeiko Carstens la %r6,COMMAND_LINE-PARMAREA(%r12) 7394d34778SHeiko Carstens lgr %r7,%r2 7494d34778SHeiko Carstens aghi %r7,1 7594d34778SHeiko Carstens mvcl %r6,%r4 7694d34778SHeiko Carstens.Lnopf: 7794d34778SHeiko Carstens# 7894d34778SHeiko Carstens# load ramdisk from ipl device 7994d34778SHeiko Carstens# 8094d34778SHeiko Carstens.Lagain2: 8194d34778SHeiko Carstens larl %r2,_end # addr of ramdisk 8294d34778SHeiko Carstens stg %r2,INITRD_START-PARMAREA(%r12) 8394d34778SHeiko Carstens bras %r14,.Lloader # load ramdisk 8494d34778SHeiko Carstens stg %r2,INITRD_SIZE-PARMAREA(%r12) # store size of rd 8594d34778SHeiko Carstens ltgr %r2,%r2 8694d34778SHeiko Carstens jnz .Lrdcont 8794d34778SHeiko Carstens stg %r2,INITRD_START-PARMAREA(%r12) # no ramdisk found 8894d34778SHeiko Carstens.Lrdcont: 8994d34778SHeiko Carstens larl %r2,_end 9094d34778SHeiko Carstens larl %r13,.L_hdr # skip HDRx and EOFx 9194d34778SHeiko Carstens clc 0(3,%r2),0(%r13) 9294d34778SHeiko Carstens jz .Lagain2 9394d34778SHeiko Carstens larl %r13,.L_eof 9494d34778SHeiko Carstens clc 0(3,%r2),0(%r13) 9594d34778SHeiko Carstens jz .Lagain2 9694d34778SHeiko Carstens# 9794d34778SHeiko Carstens# reset files in VM reader 9894d34778SHeiko Carstens# 9994d34778SHeiko Carstens larl %r13,.Lcpuid 10094d34778SHeiko Carstens stidp 0(%r13) # store cpuid 10194d34778SHeiko Carstens tm 0(%r13),0xff # running VM ? 10294d34778SHeiko Carstens jno .Lnoreset 10394d34778SHeiko Carstens larl %r2,.Lreset 10494d34778SHeiko Carstens lghi %r3,26 10594d34778SHeiko Carstens diag %r2,%r3,8 10694d34778SHeiko Carstens larl %r5,.Lirb 10794d34778SHeiko Carstens stsch 0(%r5) # check if irq is pending 10894d34778SHeiko Carstens tm 30(%r5),0x0f # by verifying if any of the 10994d34778SHeiko Carstens jnz .Lwaitforirq # activity or status control 11094d34778SHeiko Carstens tm 31(%r5),0xff # bits is set in the schib 11194d34778SHeiko Carstens jz .Lnoreset 11294d34778SHeiko Carstens.Lwaitforirq: 11394d34778SHeiko Carstens bras %r14,.Lirqwait # wait for IO interrupt 11494d34778SHeiko Carstens c %r1,__LC_SUBCHANNEL_ID # compare subchannel number 11594d34778SHeiko Carstens jne .Lwaitforirq 11694d34778SHeiko Carstens larl %r5,.Lirb 11794d34778SHeiko Carstens tsch 0(%r5) 11894d34778SHeiko Carstens.Lnoreset: 11994d34778SHeiko Carstens j .Lnoload 12094d34778SHeiko Carstens# 12194d34778SHeiko Carstens# everything loaded, go for it 12294d34778SHeiko Carstens# 12394d34778SHeiko Carstens.Lnoload: 12494d34778SHeiko Carstens jg startup 1258282cd64SVasily Gorbik# 1268282cd64SVasily Gorbik# subroutine to wait for end I/O 1278282cd64SVasily Gorbik# 1288282cd64SVasily Gorbik.Lirqwait: 12994d34778SHeiko Carstens larl %r13,.Lnewpswmask # set up IO interrupt psw 13094d34778SHeiko Carstens mvc __LC_IO_NEW_PSW(8),0(%r13) 13194d34778SHeiko Carstens stg %r14,__LC_IO_NEW_PSW+8 13294d34778SHeiko Carstens larl %r13,.Lwaitpsw 13394d34778SHeiko Carstens lpswe 0(%r13) 1348282cd64SVasily Gorbik.Lioint: 1358282cd64SVasily Gorbik# 1368282cd64SVasily Gorbik# subroutine for loading cards from the reader 1378282cd64SVasily Gorbik# 1388282cd64SVasily Gorbik.Lloader: 13994d34778SHeiko Carstens lgr %r4,%r14 14094d34778SHeiko Carstens larl %r3,.Lorb # r2 = address of orb into r2 14194d34778SHeiko Carstens larl %r5,.Lirb # r4 = address of irb 14294d34778SHeiko Carstens larl %r6,.Lccws 14394d34778SHeiko Carstens lghi %r7,20 1448282cd64SVasily Gorbik.Linit: 1458282cd64SVasily Gorbik st %r2,4(%r6) # initialize CCW data addresses 1468282cd64SVasily Gorbik la %r2,0x50(%r2) 1478282cd64SVasily Gorbik la %r6,8(%r6) 14894d34778SHeiko Carstens brctg %r7,.Linit 14994d34778SHeiko Carstens larl %r13,.Lcr6 15094d34778SHeiko Carstens lctlg %c6,%c6,0(%r13) 15194d34778SHeiko Carstens xgr %r2,%r2 1528282cd64SVasily Gorbik.Lldlp: 1538282cd64SVasily Gorbik ssch 0(%r3) # load chunk of 1600 bytes 15494d34778SHeiko Carstens jnz .Llderr 1558282cd64SVasily Gorbik.Lwait4irq: 15694d34778SHeiko Carstens bras %r14,.Lirqwait 1578282cd64SVasily Gorbik c %r1,__LC_SUBCHANNEL_ID # compare subchannel number 15894d34778SHeiko Carstens jne .Lwait4irq 1598282cd64SVasily Gorbik tsch 0(%r5) 16094d34778SHeiko Carstens xgr %r0,%r0 1618282cd64SVasily Gorbik ic %r0,8(%r5) # get device status 16294d34778SHeiko Carstens cghi %r0,8 # channel end ? 16394d34778SHeiko Carstens je .Lcont 16494d34778SHeiko Carstens cghi %r0,12 # channel end + device end ? 16594d34778SHeiko Carstens je .Lcont 16694d34778SHeiko Carstens llgf %r0,4(%r5) 16794d34778SHeiko Carstens sgf %r0,8(%r3) # r0/8 = number of ccws executed 16894d34778SHeiko Carstens mghi %r0,10 # *10 = number of bytes in ccws 16994d34778SHeiko Carstens llgh %r3,10(%r5) # get residual count 17094d34778SHeiko Carstens sgr %r0,%r3 # #ccws*80-residual=#bytes read 17194d34778SHeiko Carstens agr %r2,%r0 1728282cd64SVasily Gorbik br %r4 # r2 contains the total size 1738282cd64SVasily Gorbik.Lcont: 17494d34778SHeiko Carstens aghi %r2,0x640 # add 0x640 to total size 17594d34778SHeiko Carstens larl %r6,.Lccws 17694d34778SHeiko Carstens lghi %r7,20 1778282cd64SVasily Gorbik.Lincr: 1788282cd64SVasily Gorbik l %r0,4(%r6) # update CCW data addresses 17994d34778SHeiko Carstens aghi %r0,0x640 1808282cd64SVasily Gorbik st %r0,4(%r6) 18194d34778SHeiko Carstens aghi %r6,8 18294d34778SHeiko Carstens brctg %r7,.Lincr 18394d34778SHeiko Carstens j .Lldlp 1848282cd64SVasily Gorbik.Llderr: 18594d34778SHeiko Carstens larl %r13,.Lcrash 18694d34778SHeiko Carstens lpsw 0(%r13) 1878282cd64SVasily Gorbik 18827d45655SHeiko Carstens .balign 8 18994d34778SHeiko Carstens.Lwaitpsw: 19094d34778SHeiko Carstens .quad 0x0202000180000000,.Lioint 19194d34778SHeiko Carstens.Lnewpswmask: 19294d34778SHeiko Carstens .quad 0x0000000180000000 19327d45655SHeiko Carstens .balign 8 1948282cd64SVasily Gorbik.Lorb: .long 0x00000000,0x0080ff00,.Lccws 1958282cd64SVasily Gorbik.Lirb: .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 19627d45655SHeiko Carstens .balign 8 19794d34778SHeiko Carstens.Lcr6: .quad 0x00000000ff000000 19827d45655SHeiko Carstens .balign 8 1998282cd64SVasily Gorbik.Lcrash:.long 0x000a0000,0x00000000 20027d45655SHeiko Carstens .balign 8 2018282cd64SVasily Gorbik.Lccws: .rept 19 2028282cd64SVasily Gorbik .long 0x02600050,0x00000000 2038282cd64SVasily Gorbik .endr 2048282cd64SVasily Gorbik .long 0x02200050,0x00000000 2058282cd64SVasily Gorbik.Lreset:.byte 0xc3,0xc8,0xc1,0xd5,0xc7,0xc5,0x40,0xd9,0xc4,0xd9,0x40 2068282cd64SVasily Gorbik .byte 0xc1,0xd3,0xd3,0x40,0xd2,0xc5,0xc5,0xd7,0x40,0xd5,0xd6 2078282cd64SVasily Gorbik .byte 0xc8,0xd6,0xd3,0xc4 # "change rdr all keep nohold" 2088282cd64SVasily Gorbik.L_eof: .long 0xc5d6c600 /* C'EOF' */ 2098282cd64SVasily Gorbik.L_hdr: .long 0xc8c4d900 /* C'HDR' */ 21027d45655SHeiko Carstens .balign 8 2118282cd64SVasily Gorbik.Lcpuid:.fill 8,1,0 2128282cd64SVasily Gorbik 2138282cd64SVasily Gorbik# 2148b6bd6f2SAlexander Egorenkov# normal startup-code, running in absolute addressing mode 2158282cd64SVasily Gorbik# this is called either by the ipl loader or directly by PSW restart 2168282cd64SVasily Gorbik# or linload or SALIPL 2178282cd64SVasily Gorbik# 218834979c2SHeiko Carstens .org STARTUP_NORMAL_OFFSET - IPL_START 219ec55d1e1SVasily GorbikSYM_CODE_START(startup) 220ec55d1e1SVasily Gorbik j startup_normal 221834979c2SHeiko Carstens .org EP_OFFSET - IPL_START 2228282cd64SVasily Gorbik# 2238282cd64SVasily Gorbik# This is a list of s390 kernel entry points. At address 0x1000f the number of 2248282cd64SVasily Gorbik# valid entry points is stored. 2258282cd64SVasily Gorbik# 2268282cd64SVasily Gorbik# IMPORTANT: Do not change this table, it is s390 kernel ABI! 2278282cd64SVasily Gorbik# 228627c9b62SVasily Gorbik .ascii EP_STRING 2298282cd64SVasily Gorbik .byte 0x00,0x01 2308282cd64SVasily Gorbik# 2318b6bd6f2SAlexander Egorenkov# kdump startup-code, running in 64 bit absolute addressing mode 2328282cd64SVasily Gorbik# 233834979c2SHeiko Carstens .org STARTUP_KDUMP_OFFSET - IPL_START 234ec55d1e1SVasily Gorbik j startup_kdump 235ec55d1e1SVasily GorbikSYM_CODE_END(startup) 236ec55d1e1SVasily GorbikSYM_CODE_START_LOCAL(startup_normal) 2378282cd64SVasily Gorbik mvi __LC_AR_MODE_ID,1 # set esame flag 2388282cd64SVasily Gorbik slr %r0,%r0 # set cpuid to zero 2398282cd64SVasily Gorbik lhi %r1,2 # mode 2 = esame (dump) 2408282cd64SVasily Gorbik sigp %r1,%r0,0x12 # switch to esame mode 2418282cd64SVasily Gorbik bras %r13,0f 2428282cd64SVasily Gorbik .fill 16,4,0x0 2438282cd64SVasily Gorbik0: lmh %r0,%r15,0(%r13) # clear high-order half of gprs 2448282cd64SVasily Gorbik sam64 # switch to 64 bit addressing mode 245e9953b72SHeiko Carstens larl %r13,.Lext_new_psw 246e9953b72SHeiko Carstens mvc __LC_EXT_NEW_PSW(16),0(%r13) 247e9953b72SHeiko Carstens larl %r13,.Lpgm_new_psw 248e9953b72SHeiko Carstens mvc __LC_PGM_NEW_PSW(16),0(%r13) 249e9953b72SHeiko Carstens larl %r13,.Lio_new_psw 250e9953b72SHeiko Carstens mvc __LC_IO_NEW_PSW(16),0(%r13) 2518282cd64SVasily Gorbik xc 0x200(256),0x200 # partially clear lowcore 2528282cd64SVasily Gorbik xc 0x300(256),0x300 2538282cd64SVasily Gorbik xc 0xe00(256),0xe00 2548282cd64SVasily Gorbik xc 0xf00(256),0xf00 255e9953b72SHeiko Carstens larl %r13,.Lctl 256e9953b72SHeiko Carstens lctlg %c0,%c15,0(%r13) # load control registers 2578282cd64SVasily Gorbik stcke __LC_BOOT_CLOCK 2588282cd64SVasily Gorbik mvc __LC_LAST_UPDATE_CLOCK(8),__LC_BOOT_CLOCK+1 259e9953b72SHeiko Carstens larl %r13,6f 260e9953b72SHeiko Carstens spt 0(%r13) 261e9953b72SHeiko Carstens mvc __LC_LAST_UPDATE_TIMER(8),0(%r13) 262256d78d0SAlexander Egorenkov larl %r15,_stack_end-STACK_FRAME_OVERHEAD 263f1d3c532SAlexander Egorenkov brasl %r14,sclp_early_setup_buffer 2648282cd64SVasily Gorbik brasl %r14,verify_facilities 2658f75582aSVasily Gorbik brasl %r14,startup_kernel 266ec55d1e1SVasily GorbikSYM_CODE_END(startup_normal) 2678282cd64SVasily Gorbik 26827d45655SHeiko Carstens .balign 8 2698282cd64SVasily Gorbik6: .long 0x7fffffff,0xffffffff 27013b5bd8aSVasily Gorbik.Lext_new_psw: 27113b5bd8aSVasily Gorbik .quad 0x0002000180000000,0x1b0 # disabled wait 27213b5bd8aSVasily Gorbik.Lpgm_new_psw: 27313b5bd8aSVasily Gorbik .quad 0x0000000180000000,startup_pgm_check_handler 27413b5bd8aSVasily Gorbik.Lio_new_psw: 27513b5bd8aSVasily Gorbik .quad 0x0002000180000000,0x1f0 # disabled wait 276584315edSAlexander Gordeev.Lctl: .quad 0x04040000 # cr0: AFP registers & secondary space 277584315edSAlexander Gordeev .quad 0 # cr1: primary space segment table 278584315edSAlexander Gordeev .quad 0 # cr2: dispatchable unit control table 279584315edSAlexander Gordeev .quad 0 # cr3: instruction authorization 280584315edSAlexander Gordeev .quad 0xffff # cr4: instruction authorization 281584315edSAlexander Gordeev .quad 0 # cr5: primary-aste origin 282584315edSAlexander Gordeev .quad 0 # cr6: I/O interrupts 283584315edSAlexander Gordeev .quad 0 # cr7: secondary space segment table 284584315edSAlexander Gordeev .quad 0x0000000000008000 # cr8: access registers translation 285584315edSAlexander Gordeev .quad 0 # cr9: tracing off 286584315edSAlexander Gordeev .quad 0 # cr10: tracing off 287584315edSAlexander Gordeev .quad 0 # cr11: tracing off 288584315edSAlexander Gordeev .quad 0 # cr12: tracing off 289584315edSAlexander Gordeev .quad 0 # cr13: home space segment table 290584315edSAlexander Gordeev .quad 0xc0000000 # cr14: machine check handling off 291584315edSAlexander Gordeev .quad 0 # cr15: linkage stack operations 292a80313ffSGerald Schaefer 2938282cd64SVasily Gorbik#include "head_kdump.S" 2948282cd64SVasily Gorbik 2958282cd64SVasily Gorbik# 296da9ed30dSVasily Gorbik# This program check is active immediately after kernel start 297da9ed30dSVasily Gorbik# and until early_pgm_check_handler is set in kernel/early.c 298da9ed30dSVasily Gorbik# It simply saves general/control registers and psw in 299da9ed30dSVasily Gorbik# the save area and does disabled wait with a faulty address. 300da9ed30dSVasily Gorbik# 301ec55d1e1SVasily GorbikSYM_CODE_START_LOCAL(startup_pgm_check_handler) 3022835c2eaSVasily Gorbik stmg %r8,%r15,__LC_SAVE_AREA_SYNC 3032835c2eaSVasily Gorbik la %r8,4095 3042835c2eaSVasily Gorbik stctg %c0,%c15,__LC_CREGS_SAVE_AREA-4095(%r8) 3052835c2eaSVasily Gorbik stmg %r0,%r7,__LC_GPREGS_SAVE_AREA-4095(%r8) 3062835c2eaSVasily Gorbik mvc __LC_GPREGS_SAVE_AREA-4095+64(64,%r8),__LC_SAVE_AREA_SYNC 3072835c2eaSVasily Gorbik mvc __LC_PSW_SAVE_AREA-4095(16,%r8),__LC_PGM_OLD_PSW 308da9ed30dSVasily Gorbik mvc __LC_RETURN_PSW(16),__LC_PGM_OLD_PSW 309da9ed30dSVasily Gorbik ni __LC_RETURN_PSW,0xfc # remove IO and EX bits 310da9ed30dSVasily Gorbik ni __LC_RETURN_PSW+1,0xfb # remove MCHK bit 311da9ed30dSVasily Gorbik oi __LC_RETURN_PSW+1,0x2 # set wait state bit 3122835c2eaSVasily Gorbik larl %r9,.Lold_psw_disabled_wait 3132835c2eaSVasily Gorbik stg %r9,__LC_PGM_NEW_PSW+8 314256d78d0SAlexander Egorenkov larl %r15,_dump_info_stack_end-STACK_FRAME_OVERHEAD 315724dc336SVasily Gorbik brasl %r14,print_pgm_check_info 316724dc336SVasily Gorbik.Lold_psw_disabled_wait: 3172835c2eaSVasily Gorbik la %r8,4095 3182835c2eaSVasily Gorbik lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r8) 319da9ed30dSVasily Gorbik lpswe __LC_RETURN_PSW # disabled wait 320ec55d1e1SVasily GorbikSYM_CODE_END(startup_pgm_check_handler) 321