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/thread_info.h> 298282cd64SVasily Gorbik#include <asm/page.h> 308282cd64SVasily Gorbik#include <asm/ptrace.h> 318282cd64SVasily Gorbik 328282cd64SVasily Gorbik#define ARCH_OFFSET 4 338282cd64SVasily Gorbik 348282cd64SVasily Gorbik__HEAD 358282cd64SVasily Gorbik 368282cd64SVasily Gorbik#define IPL_BS 0x730 378282cd64SVasily Gorbik .org 0 388282cd64SVasily Gorbik .long 0x00080000,0x80000000+iplstart # The first 24 bytes are loaded 398282cd64SVasily Gorbik .long 0x02000018,0x60000050 # by ipl to addresses 0-23. 408282cd64SVasily Gorbik .long 0x02000068,0x60000050 # (a PSW and two CCWs). 418282cd64SVasily Gorbik .fill 80-24,1,0x40 # bytes 24-79 are discarded !! 428282cd64SVasily Gorbik .long 0x020000f0,0x60000050 # The next 160 byte are loaded 438282cd64SVasily Gorbik .long 0x02000140,0x60000050 # to addresses 0x18-0xb7 448282cd64SVasily Gorbik .long 0x02000190,0x60000050 # They form the continuation 458282cd64SVasily Gorbik .long 0x020001e0,0x60000050 # of the CCW program started 468282cd64SVasily Gorbik .long 0x02000230,0x60000050 # by ipl and load the range 478282cd64SVasily Gorbik .long 0x02000280,0x60000050 # 0x0f0-0x730 from the image 488282cd64SVasily Gorbik .long 0x020002d0,0x60000050 # to the range 0x0f0-0x730 498282cd64SVasily Gorbik .long 0x02000320,0x60000050 # in memory. At the end of 508282cd64SVasily Gorbik .long 0x02000370,0x60000050 # the channel program the PSW 518282cd64SVasily Gorbik .long 0x020003c0,0x60000050 # at location 0 is loaded. 528282cd64SVasily Gorbik .long 0x02000410,0x60000050 # Initial processing starts 538282cd64SVasily Gorbik .long 0x02000460,0x60000050 # at 0x200 = iplstart. 548282cd64SVasily Gorbik .long 0x020004b0,0x60000050 558282cd64SVasily Gorbik .long 0x02000500,0x60000050 568282cd64SVasily Gorbik .long 0x02000550,0x60000050 578282cd64SVasily Gorbik .long 0x020005a0,0x60000050 588282cd64SVasily Gorbik .long 0x020005f0,0x60000050 598282cd64SVasily Gorbik .long 0x02000640,0x60000050 608282cd64SVasily Gorbik .long 0x02000690,0x60000050 618282cd64SVasily Gorbik .long 0x020006e0,0x20000050 628282cd64SVasily Gorbik 638282cd64SVasily Gorbik .org 0x200 648282cd64SVasily Gorbik 658282cd64SVasily Gorbik# 668282cd64SVasily Gorbik# subroutine to wait for end I/O 678282cd64SVasily Gorbik# 688282cd64SVasily Gorbik.Lirqwait: 698282cd64SVasily Gorbik mvc __LC_IO_NEW_PSW(16),.Lnewpsw # set up IO interrupt psw 708282cd64SVasily Gorbik lpsw .Lwaitpsw 718282cd64SVasily Gorbik.Lioint: 728282cd64SVasily Gorbik br %r14 738282cd64SVasily Gorbik .align 8 748282cd64SVasily Gorbik.Lnewpsw: 758282cd64SVasily Gorbik .quad 0x0000000080000000,.Lioint 768282cd64SVasily Gorbik.Lwaitpsw: 778282cd64SVasily Gorbik .long 0x020a0000,0x80000000+.Lioint 788282cd64SVasily Gorbik 798282cd64SVasily Gorbik# 808282cd64SVasily Gorbik# subroutine for loading cards from the reader 818282cd64SVasily Gorbik# 828282cd64SVasily Gorbik.Lloader: 838282cd64SVasily Gorbik la %r4,0(%r14) 848282cd64SVasily Gorbik la %r3,.Lorb # r2 = address of orb into r2 858282cd64SVasily Gorbik la %r5,.Lirb # r4 = address of irb 868282cd64SVasily Gorbik la %r6,.Lccws 878282cd64SVasily Gorbik la %r7,20 888282cd64SVasily Gorbik.Linit: 898282cd64SVasily Gorbik st %r2,4(%r6) # initialize CCW data addresses 908282cd64SVasily Gorbik la %r2,0x50(%r2) 918282cd64SVasily Gorbik la %r6,8(%r6) 928282cd64SVasily Gorbik bct 7,.Linit 938282cd64SVasily Gorbik 948282cd64SVasily Gorbik lctl %c6,%c6,.Lcr6 # set IO subclass mask 958282cd64SVasily Gorbik slr %r2,%r2 968282cd64SVasily Gorbik.Lldlp: 978282cd64SVasily Gorbik ssch 0(%r3) # load chunk of 1600 bytes 988282cd64SVasily Gorbik bnz .Llderr 998282cd64SVasily Gorbik.Lwait4irq: 1008282cd64SVasily Gorbik bas %r14,.Lirqwait 1018282cd64SVasily Gorbik c %r1,__LC_SUBCHANNEL_ID # compare subchannel number 1028282cd64SVasily Gorbik bne .Lwait4irq 1038282cd64SVasily Gorbik tsch 0(%r5) 1048282cd64SVasily Gorbik 1058282cd64SVasily Gorbik slr %r0,%r0 1068282cd64SVasily Gorbik ic %r0,8(%r5) # get device status 1078282cd64SVasily Gorbik chi %r0,8 # channel end ? 1088282cd64SVasily Gorbik be .Lcont 1098282cd64SVasily Gorbik chi %r0,12 # channel end + device end ? 1108282cd64SVasily Gorbik be .Lcont 1118282cd64SVasily Gorbik 1128282cd64SVasily Gorbik l %r0,4(%r5) 1138282cd64SVasily Gorbik s %r0,8(%r3) # r0/8 = number of ccws executed 1148282cd64SVasily Gorbik mhi %r0,10 # *10 = number of bytes in ccws 1158282cd64SVasily Gorbik lh %r3,10(%r5) # get residual count 1168282cd64SVasily Gorbik sr %r0,%r3 # #ccws*80-residual=#bytes read 1178282cd64SVasily Gorbik ar %r2,%r0 1188282cd64SVasily Gorbik 1198282cd64SVasily Gorbik br %r4 # r2 contains the total size 1208282cd64SVasily Gorbik 1218282cd64SVasily Gorbik.Lcont: 1228282cd64SVasily Gorbik ahi %r2,0x640 # add 0x640 to total size 1238282cd64SVasily Gorbik la %r6,.Lccws 1248282cd64SVasily Gorbik la %r7,20 1258282cd64SVasily Gorbik.Lincr: 1268282cd64SVasily Gorbik l %r0,4(%r6) # update CCW data addresses 1278282cd64SVasily Gorbik ahi %r0,0x640 1288282cd64SVasily Gorbik st %r0,4(%r6) 1298282cd64SVasily Gorbik ahi %r6,8 1308282cd64SVasily Gorbik bct 7,.Lincr 1318282cd64SVasily Gorbik 1328282cd64SVasily Gorbik b .Lldlp 1338282cd64SVasily Gorbik.Llderr: 1348282cd64SVasily Gorbik lpsw .Lcrash 1358282cd64SVasily Gorbik 1368282cd64SVasily Gorbik .align 8 1378282cd64SVasily Gorbik.Lorb: .long 0x00000000,0x0080ff00,.Lccws 1388282cd64SVasily Gorbik.Lirb: .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 1398282cd64SVasily Gorbik.Lcr6: .long 0xff000000 1408282cd64SVasily Gorbik.Lloadp:.long 0,0 1418282cd64SVasily Gorbik .align 8 1428282cd64SVasily Gorbik.Lcrash:.long 0x000a0000,0x00000000 1438282cd64SVasily Gorbik 1448282cd64SVasily Gorbik .align 8 1458282cd64SVasily Gorbik.Lccws: .rept 19 1468282cd64SVasily Gorbik .long 0x02600050,0x00000000 1478282cd64SVasily Gorbik .endr 1488282cd64SVasily Gorbik .long 0x02200050,0x00000000 1498282cd64SVasily Gorbik 1508282cd64SVasily Gorbikiplstart: 1518282cd64SVasily Gorbik mvi __LC_AR_MODE_ID,1 # set esame flag 1528282cd64SVasily Gorbik slr %r0,%r0 # set cpuid to zero 1538282cd64SVasily Gorbik lhi %r1,2 # mode 2 = esame (dump) 1548282cd64SVasily Gorbik sigp %r1,%r0,0x12 # switch to esame mode 1558282cd64SVasily Gorbik bras %r13,0f 1568282cd64SVasily Gorbik .fill 16,4,0x0 1578282cd64SVasily Gorbik0: lmh %r0,%r15,0(%r13) # clear high-order half of gprs 1588282cd64SVasily Gorbik sam31 # switch to 31 bit addressing mode 1598282cd64SVasily Gorbik lh %r1,__LC_SUBCHANNEL_ID # test if subchannel number 1608282cd64SVasily Gorbik bct %r1,.Lnoload # is valid 1618282cd64SVasily Gorbik l %r1,__LC_SUBCHANNEL_ID # load ipl subchannel number 1628282cd64SVasily Gorbik la %r2,IPL_BS # load start address 1638282cd64SVasily Gorbik bas %r14,.Lloader # load rest of ipl image 1648282cd64SVasily Gorbik l %r12,.Lparm # pointer to parameter area 1658282cd64SVasily Gorbik st %r1,IPL_DEVICE+ARCH_OFFSET-PARMAREA(%r12) # save ipl device number 1668282cd64SVasily Gorbik 1678282cd64SVasily Gorbik# 1688282cd64SVasily Gorbik# load parameter file from ipl device 1698282cd64SVasily Gorbik# 1708282cd64SVasily Gorbik.Lagain1: 1718282cd64SVasily Gorbik l %r2,.Linitrd # ramdisk loc. is temp 1728282cd64SVasily Gorbik bas %r14,.Lloader # load parameter file 1738282cd64SVasily Gorbik ltr %r2,%r2 # got anything ? 1748282cd64SVasily Gorbik bz .Lnopf 1758282cd64SVasily Gorbik chi %r2,895 1768282cd64SVasily Gorbik bnh .Lnotrunc 1778282cd64SVasily Gorbik la %r2,895 1788282cd64SVasily Gorbik.Lnotrunc: 1798282cd64SVasily Gorbik l %r4,.Linitrd 1808282cd64SVasily Gorbik clc 0(3,%r4),.L_hdr # if it is HDRx 1818282cd64SVasily Gorbik bz .Lagain1 # skip dataset header 1828282cd64SVasily Gorbik clc 0(3,%r4),.L_eof # if it is EOFx 1838282cd64SVasily Gorbik bz .Lagain1 # skip dateset trailer 1848282cd64SVasily Gorbik la %r5,0(%r4,%r2) 1858282cd64SVasily Gorbik lr %r3,%r2 1868282cd64SVasily Gorbik la %r3,COMMAND_LINE-PARMAREA(%r12) # load adr. of command line 1878282cd64SVasily Gorbik mvc 0(256,%r3),0(%r4) 1888282cd64SVasily Gorbik mvc 256(256,%r3),256(%r4) 1898282cd64SVasily Gorbik mvc 512(256,%r3),512(%r4) 1908282cd64SVasily Gorbik mvc 768(122,%r3),768(%r4) 1918282cd64SVasily Gorbik slr %r0,%r0 1928282cd64SVasily Gorbik b .Lcntlp 1938282cd64SVasily Gorbik.Ldelspc: 1948282cd64SVasily Gorbik ic %r0,0(%r2,%r3) 1958282cd64SVasily Gorbik chi %r0,0x20 # is it a space ? 1968282cd64SVasily Gorbik be .Lcntlp 1978282cd64SVasily Gorbik ahi %r2,1 1988282cd64SVasily Gorbik b .Leolp 1998282cd64SVasily Gorbik.Lcntlp: 2008282cd64SVasily Gorbik brct %r2,.Ldelspc 2018282cd64SVasily Gorbik.Leolp: 2028282cd64SVasily Gorbik slr %r0,%r0 2038282cd64SVasily Gorbik stc %r0,0(%r2,%r3) # terminate buffer 2048282cd64SVasily Gorbik.Lnopf: 2058282cd64SVasily Gorbik 2068282cd64SVasily Gorbik# 2078282cd64SVasily Gorbik# load ramdisk from ipl device 2088282cd64SVasily Gorbik# 2098282cd64SVasily Gorbik.Lagain2: 2108282cd64SVasily Gorbik l %r2,.Linitrd # addr of ramdisk 2118282cd64SVasily Gorbik st %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) 2128282cd64SVasily Gorbik bas %r14,.Lloader # load ramdisk 2138282cd64SVasily Gorbik st %r2,INITRD_SIZE+ARCH_OFFSET-PARMAREA(%r12) # store size of rd 2148282cd64SVasily Gorbik ltr %r2,%r2 2158282cd64SVasily Gorbik bnz .Lrdcont 2168282cd64SVasily Gorbik st %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # no ramdisk found 2178282cd64SVasily Gorbik.Lrdcont: 2188282cd64SVasily Gorbik l %r2,.Linitrd 2198282cd64SVasily Gorbik 2208282cd64SVasily Gorbik clc 0(3,%r2),.L_hdr # skip HDRx and EOFx 2218282cd64SVasily Gorbik bz .Lagain2 2228282cd64SVasily Gorbik clc 0(3,%r2),.L_eof 2238282cd64SVasily Gorbik bz .Lagain2 2248282cd64SVasily Gorbik 2258282cd64SVasily Gorbik# 2268282cd64SVasily Gorbik# reset files in VM reader 2278282cd64SVasily Gorbik# 2288282cd64SVasily Gorbik stidp .Lcpuid # store cpuid 2298282cd64SVasily Gorbik tm .Lcpuid,0xff # running VM ? 2308282cd64SVasily Gorbik bno .Lnoreset 2318282cd64SVasily Gorbik la %r2,.Lreset 2328282cd64SVasily Gorbik lhi %r3,26 2338282cd64SVasily Gorbik diag %r2,%r3,8 2348282cd64SVasily Gorbik la %r5,.Lirb 2358282cd64SVasily Gorbik stsch 0(%r5) # check if irq is pending 2368282cd64SVasily Gorbik tm 30(%r5),0x0f # by verifying if any of the 2378282cd64SVasily Gorbik bnz .Lwaitforirq # activity or status control 2388282cd64SVasily Gorbik tm 31(%r5),0xff # bits is set in the schib 2398282cd64SVasily Gorbik bz .Lnoreset 2408282cd64SVasily Gorbik.Lwaitforirq: 2418282cd64SVasily Gorbik bas %r14,.Lirqwait # wait for IO interrupt 2428282cd64SVasily Gorbik c %r1,__LC_SUBCHANNEL_ID # compare subchannel number 2438282cd64SVasily Gorbik bne .Lwaitforirq 2448282cd64SVasily Gorbik la %r5,.Lirb 2458282cd64SVasily Gorbik tsch 0(%r5) 2468282cd64SVasily Gorbik.Lnoreset: 2478282cd64SVasily Gorbik b .Lnoload 2488282cd64SVasily Gorbik 2498282cd64SVasily Gorbik# 2508282cd64SVasily Gorbik# everything loaded, go for it 2518282cd64SVasily Gorbik# 2528282cd64SVasily Gorbik.Lnoload: 2538282cd64SVasily Gorbik l %r1,.Lstartup 2548282cd64SVasily Gorbik br %r1 2558282cd64SVasily Gorbik 2568282cd64SVasily Gorbik.Linitrd:.long _end # default address of initrd 2578282cd64SVasily Gorbik.Lparm: .long PARMAREA 2588282cd64SVasily Gorbik.Lstartup: .long startup 2598282cd64SVasily Gorbik.Lreset:.byte 0xc3,0xc8,0xc1,0xd5,0xc7,0xc5,0x40,0xd9,0xc4,0xd9,0x40 2608282cd64SVasily Gorbik .byte 0xc1,0xd3,0xd3,0x40,0xd2,0xc5,0xc5,0xd7,0x40,0xd5,0xd6 2618282cd64SVasily Gorbik .byte 0xc8,0xd6,0xd3,0xc4 # "change rdr all keep nohold" 2628282cd64SVasily Gorbik.L_eof: .long 0xc5d6c600 /* C'EOF' */ 2638282cd64SVasily Gorbik.L_hdr: .long 0xc8c4d900 /* C'HDR' */ 2648282cd64SVasily Gorbik .align 8 2658282cd64SVasily Gorbik.Lcpuid:.fill 8,1,0 2668282cd64SVasily Gorbik 2678282cd64SVasily Gorbik# 2688282cd64SVasily Gorbik# startup-code at 0x10000, running in absolute addressing mode 2698282cd64SVasily Gorbik# this is called either by the ipl loader or directly by PSW restart 2708282cd64SVasily Gorbik# or linload or SALIPL 2718282cd64SVasily Gorbik# 2728282cd64SVasily Gorbik .org 0x10000 2738282cd64SVasily GorbikENTRY(startup) 2748282cd64SVasily Gorbik j .Lep_startup_normal 2758282cd64SVasily Gorbik .org 0x10008 2768282cd64SVasily Gorbik# 2778282cd64SVasily Gorbik# This is a list of s390 kernel entry points. At address 0x1000f the number of 2788282cd64SVasily Gorbik# valid entry points is stored. 2798282cd64SVasily Gorbik# 2808282cd64SVasily Gorbik# IMPORTANT: Do not change this table, it is s390 kernel ABI! 2818282cd64SVasily Gorbik# 2828282cd64SVasily Gorbik .ascii "S390EP" 2838282cd64SVasily Gorbik .byte 0x00,0x01 2848282cd64SVasily Gorbik# 2858282cd64SVasily Gorbik# kdump startup-code at 0x10010, running in 64 bit absolute addressing mode 2868282cd64SVasily Gorbik# 2878282cd64SVasily Gorbik .org 0x10010 2888282cd64SVasily GorbikENTRY(startup_kdump) 2898282cd64SVasily Gorbik j .Lep_startup_kdump 2908282cd64SVasily Gorbik.Lep_startup_normal: 2918282cd64SVasily Gorbik mvi __LC_AR_MODE_ID,1 # set esame flag 2928282cd64SVasily Gorbik slr %r0,%r0 # set cpuid to zero 2938282cd64SVasily Gorbik lhi %r1,2 # mode 2 = esame (dump) 2948282cd64SVasily Gorbik sigp %r1,%r0,0x12 # switch to esame mode 2958282cd64SVasily Gorbik bras %r13,0f 2968282cd64SVasily Gorbik .fill 16,4,0x0 2978282cd64SVasily Gorbik0: lmh %r0,%r15,0(%r13) # clear high-order half of gprs 2988282cd64SVasily Gorbik sam64 # switch to 64 bit addressing mode 2998282cd64SVasily Gorbik basr %r13,0 # get base 3008282cd64SVasily Gorbik.LPG0: 3018282cd64SVasily Gorbik xc 0x200(256),0x200 # partially clear lowcore 3028282cd64SVasily Gorbik xc 0x300(256),0x300 3038282cd64SVasily Gorbik xc 0xe00(256),0xe00 3048282cd64SVasily Gorbik xc 0xf00(256),0xf00 3058282cd64SVasily Gorbik lctlg %c0,%c15,0x200(%r0) # initialize control registers 3068282cd64SVasily Gorbik stcke __LC_BOOT_CLOCK 3078282cd64SVasily Gorbik mvc __LC_LAST_UPDATE_CLOCK(8),__LC_BOOT_CLOCK+1 3088282cd64SVasily Gorbik spt 6f-.LPG0(%r13) 3098282cd64SVasily Gorbik mvc __LC_LAST_UPDATE_TIMER(8),6f-.LPG0(%r13) 3108282cd64SVasily Gorbik l %r15,.Lstack-.LPG0(%r13) 3118282cd64SVasily Gorbik ahi %r15,-STACK_FRAME_OVERHEAD 3128282cd64SVasily Gorbik brasl %r14,verify_facilities 3138282cd64SVasily Gorbik# For uncompressed images, continue in 3148282cd64SVasily Gorbik# arch/s390/kernel/head64.S. For compressed images, continue in 3158282cd64SVasily Gorbik# arch/s390/boot/compressed/head.S. 3168282cd64SVasily Gorbik jg startup_continue 3178282cd64SVasily Gorbik 3188282cd64SVasily Gorbik.Lstack: 3198282cd64SVasily Gorbik .long 0x8000 + (1<<(PAGE_SHIFT+THREAD_SIZE_ORDER)) 3208282cd64SVasily Gorbik .align 8 3218282cd64SVasily Gorbik6: .long 0x7fffffff,0xffffffff 3228282cd64SVasily Gorbik 3238282cd64SVasily Gorbik#include "head_kdump.S" 3248282cd64SVasily Gorbik 3258282cd64SVasily Gorbik# 3268282cd64SVasily Gorbik# params at 10400 (setup.h) 3278282cd64SVasily Gorbik# 3288282cd64SVasily Gorbik .org PARMAREA 3298282cd64SVasily Gorbik .long 0,0 # IPL_DEVICE 3308282cd64SVasily Gorbik .long 0,0 # INITRD_START 3318282cd64SVasily Gorbik .long 0,0 # INITRD_SIZE 3328282cd64SVasily Gorbik .long 0,0 # OLDMEM_BASE 3338282cd64SVasily Gorbik .long 0,0 # OLDMEM_SIZE 3348282cd64SVasily Gorbik 3358282cd64SVasily Gorbik .org COMMAND_LINE 3368282cd64SVasily Gorbik .byte "root=/dev/ram0 ro" 3378282cd64SVasily Gorbik .byte 0 3388282cd64SVasily Gorbik 3398282cd64SVasily Gorbik .org 0x11000 340