/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright IBM Corp. 1999, 2010 * * Author(s): Hartmut Penner * Martin Schwidefsky * Rob van der Heij * Heiko Carstens * * There are 5 different IPL methods * 1) load the image directly into ram at address 0 and do an PSW restart * 2) linload will load the image from address 0x10000 to memory 0x10000 * and start the code thru LPSW 0x0008000080010000 (VM only, deprecated) * 3) generate the tape ipl header, store the generated image on a tape * and ipl from it * In case of SL tape you need to IPL 5 times to get past VOL1 etc * 4) generate the vm reader ipl header, move the generated image to the * VM reader (use option NOH!) and do a ipl from reader (VM only) * 5) direct call of start by the SALIPL loader * We use the cpuid to distinguish between VM and native ipl * params for kernel are pushed to 0x10400 (see setup.h) * */ #include #include #include #include #include #include #define ARCH_OFFSET 4 __HEAD #define IPL_BS 0x730 .org 0 .long 0x00080000,0x80000000+iplstart # 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 .org 0x200 # # subroutine to wait for end I/O # .Lirqwait: mvc 0x1f0(16),.Lnewpsw # set up IO interrupt psw lpsw .Lwaitpsw .Lioint: br %r14 .align 8 .Lnewpsw: .quad 0x0000000080000000,.Lioint .Lwaitpsw: .long 0x020a0000,0x80000000+.Lioint # # subroutine for loading cards from the reader # .Lloader: la %r4,0(%r14) la %r3,.Lorb # r2 = address of orb into r2 la %r5,.Lirb # r4 = address of irb la %r6,.Lccws la %r7,20 .Linit: st %r2,4(%r6) # initialize CCW data addresses la %r2,0x50(%r2) la %r6,8(%r6) bct 7,.Linit lctl %c6,%c6,.Lcr6 # set IO subclass mask slr %r2,%r2 .Lldlp: ssch 0(%r3) # load chunk of 1600 bytes bnz .Llderr .Lwait4irq: bas %r14,.Lirqwait c %r1,0xb8 # compare subchannel number bne .Lwait4irq tsch 0(%r5) slr %r0,%r0 ic %r0,8(%r5) # get device status chi %r0,8 # channel end ? be .Lcont chi %r0,12 # channel end + device end ? be .Lcont l %r0,4(%r5) s %r0,8(%r3) # r0/8 = number of ccws executed mhi %r0,10 # *10 = number of bytes in ccws lh %r3,10(%r5) # get residual count sr %r0,%r3 # #ccws*80-residual=#bytes read ar %r2,%r0 br %r4 # r2 contains the total size .Lcont: ahi %r2,0x640 # add 0x640 to total size la %r6,.Lccws la %r7,20 .Lincr: l %r0,4(%r6) # update CCW data addresses ahi %r0,0x640 st %r0,4(%r6) ahi %r6,8 bct 7,.Lincr b .Lldlp .Llderr: lpsw .Lcrash .align 8 .Lorb: .long 0x00000000,0x0080ff00,.Lccws .Lirb: .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 .Lcr6: .long 0xff000000 .Lloadp:.long 0,0 .align 8 .Lcrash:.long 0x000a0000,0x00000000 .align 8 .Lccws: .rept 19 .long 0x02600050,0x00000000 .endr .long 0x02200050,0x00000000 iplstart: mvi __LC_AR_MODE_ID,1 # set esame flag slr %r0,%r0 # set cpuid to zero lhi %r1,2 # mode 2 = esame (dump) sigp %r1,%r0,0x12 # switch to esame mode bras %r13,0f .fill 16,4,0x0 0: lmh %r0,%r15,0(%r13) # clear high-order half of gprs sam31 # switch to 31 bit addressing mode lh %r1,0xb8 # test if subchannel number bct %r1,.Lnoload # is valid l %r1,0xb8 # load ipl subchannel number la %r2,IPL_BS # load start address bas %r14,.Lloader # load rest of ipl image l %r12,.Lparm # pointer to parameter area st %r1,IPL_DEVICE+ARCH_OFFSET-PARMAREA(%r12) # save ipl device number # # load parameter file from ipl device # .Lagain1: l %r2,.Linitrd # ramdisk loc. is temp bas %r14,.Lloader # load parameter file ltr %r2,%r2 # got anything ? bz .Lnopf chi %r2,895 bnh .Lnotrunc la %r2,895 .Lnotrunc: l %r4,.Linitrd clc 0(3,%r4),.L_hdr # if it is HDRx bz .Lagain1 # skip dataset header clc 0(3,%r4),.L_eof # if it is EOFx bz .Lagain1 # skip dateset trailer la %r5,0(%r4,%r2) lr %r3,%r2 la %r3,COMMAND_LINE-PARMAREA(%r12) # load adr. of command line mvc 0(256,%r3),0(%r4) mvc 256(256,%r3),256(%r4) mvc 512(256,%r3),512(%r4) mvc 768(122,%r3),768(%r4) slr %r0,%r0 b .Lcntlp .Ldelspc: ic %r0,0(%r2,%r3) chi %r0,0x20 # is it a space ? be .Lcntlp ahi %r2,1 b .Leolp .Lcntlp: brct %r2,.Ldelspc .Leolp: slr %r0,%r0 stc %r0,0(%r2,%r3) # terminate buffer .Lnopf: # # load ramdisk from ipl device # .Lagain2: l %r2,.Linitrd # addr of ramdisk st %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) bas %r14,.Lloader # load ramdisk st %r2,INITRD_SIZE+ARCH_OFFSET-PARMAREA(%r12) # store size of rd ltr %r2,%r2 bnz .Lrdcont st %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # no ramdisk found .Lrdcont: l %r2,.Linitrd clc 0(3,%r2),.L_hdr # skip HDRx and EOFx bz .Lagain2 clc 0(3,%r2),.L_eof bz .Lagain2 # # reset files in VM reader # stidp .Lcpuid # store cpuid tm .Lcpuid,0xff # running VM ? bno .Lnoreset la %r2,.Lreset lhi %r3,26 diag %r2,%r3,8 la %r5,.Lirb stsch 0(%r5) # check if irq is pending tm 30(%r5),0x0f # by verifying if any of the bnz .Lwaitforirq # activity or status control tm 31(%r5),0xff # bits is set in the schib bz .Lnoreset .Lwaitforirq: bas %r14,.Lirqwait # wait for IO interrupt c %r1,0xb8 # compare subchannel number bne .Lwaitforirq la %r5,.Lirb tsch 0(%r5) .Lnoreset: b .Lnoload # # everything loaded, go for it # .Lnoload: l %r1,.Lstartup br %r1 .Linitrd:.long _end # default address of initrd .Lparm: .long PARMAREA .Lstartup: .long startup .Lreset:.byte 0xc3,0xc8,0xc1,0xd5,0xc7,0xc5,0x40,0xd9,0xc4,0xd9,0x40 .byte 0xc1,0xd3,0xd3,0x40,0xd2,0xc5,0xc5,0xd7,0x40,0xd5,0xd6 .byte 0xc8,0xd6,0xd3,0xc4 # "change rdr all keep nohold" .L_eof: .long 0xc5d6c600 /* C'EOF' */ .L_hdr: .long 0xc8c4d900 /* C'HDR' */ .align 8 .Lcpuid:.fill 8,1,0 # # startup-code at 0x10000, running in absolute addressing mode # this is called either by the ipl loader or directly by PSW restart # or linload or SALIPL # .org 0x10000 ENTRY(startup) j .Lep_startup_normal .org 0x10008 # # This is a list of s390 kernel entry points. At address 0x1000f the number of # valid entry points is stored. # # IMPORTANT: Do not change this table, it is s390 kernel ABI! # .ascii "S390EP" .byte 0x00,0x01 # # kdump startup-code at 0x10010, running in 64 bit absolute addressing mode # .org 0x10010 ENTRY(startup_kdump) j .Lep_startup_kdump .Lep_startup_normal: mvi __LC_AR_MODE_ID,1 # set esame flag slr %r0,%r0 # set cpuid to zero lhi %r1,2 # mode 2 = esame (dump) sigp %r1,%r0,0x12 # switch to esame mode bras %r13,0f .fill 16,4,0x0 0: lmh %r0,%r15,0(%r13) # clear high-order half of gprs sam64 # switch to 64 bit addressing mode basr %r13,0 # get base .LPG0: xc 0x200(256),0x200 # partially clear lowcore xc 0x300(256),0x300 xc 0xe00(256),0xe00 xc 0xf00(256),0xf00 lctlg %c0,%c15,0x200(%r0) # initialize control registers stcke __LC_BOOT_CLOCK mvc __LC_LAST_UPDATE_CLOCK(8),__LC_BOOT_CLOCK+1 spt 6f-.LPG0(%r13) mvc __LC_LAST_UPDATE_TIMER(8),6f-.LPG0(%r13) l %r15,.Lstack-.LPG0(%r13) ahi %r15,-STACK_FRAME_OVERHEAD brasl %r14,verify_facilities # For uncompressed images, continue in # arch/s390/kernel/head64.S. For compressed images, continue in # arch/s390/boot/compressed/head.S. jg startup_continue .Lstack: .long 0x8000 + (1<<(PAGE_SHIFT+THREAD_SIZE_ORDER)) .align 8 6: .long 0x7fffffff,0xffffffff #include "head_kdump.S" # # params at 10400 (setup.h) # .org PARMAREA .long 0,0 # IPL_DEVICE .long 0,0 # INITRD_START .long 0,0 # INITRD_SIZE .long 0,0 # OLDMEM_BASE .long 0,0 # OLDMEM_SIZE .org COMMAND_LINE .byte "root=/dev/ram0 ro" .byte 0 .org 0x11000