| /* |
| * Copyright IBM Corp. 1999, 2010 |
| * |
| * Author(s): Hartmut Penner <hp@de.ibm.com> |
| * Martin Schwidefsky <schwidefsky@de.ibm.com> |
| * Rob van der Heij <rvdhei@iae.nl> |
| * Heiko Carstens <heiko.carstens@de.ibm.com> |
| * |
| * 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 <linux/init.h> |
| #include <linux/linkage.h> |
| #include <asm/asm-offsets.h> |
| #include <asm/thread_info.h> |
| #include <asm/page.h> |
| |
| #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 set architecture mode |
| # |
| .Lsetmode: |
| 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 |
| br %r14 |
| |
| # |
| # 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: |
| bas %r14,.Lsetmode # Immediately switch to 64 bit 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 |
| |
| # |
| # SALIPL loader support. Based on a patch by Rob van der Heij. |
| # This entry point is called directly from the SALIPL loader and |
| # doesn't need a builtin ipl record. |
| # |
| .org 0x800 |
| ENTRY(start) |
| stm %r0,%r15,0x07b0 # store registers |
| bas %r14,.Lsetmode # Immediately switch to 64 bit mode |
| basr %r12,%r0 |
| .base: |
| l %r11,.parm |
| l %r8,.cmd # pointer to command buffer |
| |
| ltr %r9,%r9 # do we have SALIPL parameters? |
| bp .sk8x8 |
| |
| mvc 0(64,%r8),0x00b0 # copy saved registers |
| xc 64(240-64,%r8),0(%r8) # remainder of buffer |
| tr 0(64,%r8),.lowcase |
| b .gotr |
| .sk8x8: |
| mvc 0(240,%r8),0(%r9) # copy iplparms into buffer |
| .gotr: |
| slr %r0,%r0 |
| st %r0,INITRD_SIZE+ARCH_OFFSET-PARMAREA(%r11) |
| st %r0,INITRD_START+ARCH_OFFSET-PARMAREA(%r11) |
| j startup # continue with startup |
| .cmd: .long COMMAND_LINE # address of command line buffer |
| .parm: .long PARMAREA |
| .lowcase: |
| .byte 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07 |
| .byte 0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f |
| .byte 0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17 |
| .byte 0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f |
| .byte 0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27 |
| .byte 0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f |
| .byte 0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37 |
| .byte 0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f |
| .byte 0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47 |
| .byte 0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f |
| .byte 0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57 |
| .byte 0x58,0x59,0x5a,0x5b,0x5c,0x5d,0x5e,0x5f |
| .byte 0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67 |
| .byte 0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f |
| .byte 0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77 |
| .byte 0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f |
| |
| .byte 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87 |
| .byte 0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f |
| .byte 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97 |
| .byte 0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f |
| .byte 0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7 |
| .byte 0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf |
| .byte 0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7 |
| .byte 0xb8,0xb9,0xba,0xbb,0xbc,0xbd,0xbe,0xbf |
| .byte 0xc0,0x81,0x82,0x83,0x84,0x85,0x86,0x87 # .abcdefg |
| .byte 0x88,0x89,0xca,0xcb,0xcc,0xcd,0xce,0xcf # hi |
| .byte 0xd0,0x91,0x92,0x93,0x94,0x95,0x96,0x97 # .jklmnop |
| .byte 0x98,0x99,0xda,0xdb,0xdc,0xdd,0xde,0xdf # qr |
| .byte 0xe0,0xe1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7 # ..stuvwx |
| .byte 0xa8,0xa9,0xea,0xeb,0xec,0xed,0xee,0xef # yz |
| .byte 0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7 |
| .byte 0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff |
| |
| # |
| # 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 |
| sam31 # switch to 31 bit addressing mode |
| basr %r13,0 # get base |
| .LPG0: |
| xc 0x200(256),0x200 # partially clear lowcore |
| xc 0x300(256),0x300 |
| xc 0xe00(256),0xe00 |
| stck __LC_LAST_UPDATE_CLOCK |
| spt 6f-.LPG0(%r13) |
| mvc __LC_LAST_UPDATE_TIMER(8),6f-.LPG0(%r13) |
| xc __LC_STFL_FAC_LIST(8),__LC_STFL_FAC_LIST |
| # check capabilities against MARCH_{G5,Z900,Z990,Z9_109,Z10} |
| .insn s,0xb2b10000,0 # store facilities @ __LC_STFL_FAC_LIST |
| tm __LC_STFL_FAC_LIST,0x01 # stfle available ? |
| jz 0f |
| la %r0,1 |
| .insn s,0xb2b00000,__LC_STFL_FAC_LIST # store facility list extended |
| # verify if all required facilities are supported by the machine |
| 0: la %r1,__LC_STFL_FAC_LIST |
| la %r2,3f+8-.LPG0(%r13) |
| l %r3,0(%r2) |
| 1: l %r0,0(%r1) |
| n %r0,4(%r2) |
| cl %r0,4(%r2) |
| jne 2f |
| la %r1,4(%r1) |
| la %r2,4(%r2) |
| ahi %r3,-1 |
| jnz 1b |
| j 4f |
| 2: l %r15,.Lstack-.LPG0(%r13) |
| ahi %r15,-96 |
| la %r2,.Lals_string-.LPG0(%r13) |
| l %r3,.Lsclp_print-.LPG0(%r13) |
| basr %r14,%r3 |
| lpsw 3f-.LPG0(%r13) # machine type not good enough, crash |
| .Lals_string: |
| .asciz "The Linux kernel requires more recent processor hardware" |
| .Lsclp_print: |
| .long _sclp_print_early |
| .Lstack: |
| .long 0x8000 + (1<<(PAGE_SHIFT+THREAD_ORDER)) |
| .align 16 |
| 3: .long 0x000a0000,0x8badcccc |
| |
| # List of facilities that are required. If not all facilities are present |
| # the kernel will crash. Format is number of facility words with bits set, |
| # followed by the facility words. |
| |
| #if defined(CONFIG_MARCH_Z13) |
| .long 3, 0xc100eff2, 0xf46ce800, 0x00400000 |
| #elif defined(CONFIG_MARCH_ZEC12) |
| .long 3, 0xc100eff2, 0xf46ce800, 0x00400000 |
| #elif defined(CONFIG_MARCH_Z196) |
| .long 2, 0xc100eff2, 0xf46c0000 |
| #elif defined(CONFIG_MARCH_Z10) |
| .long 2, 0xc100eff2, 0xf0680000 |
| #elif defined(CONFIG_MARCH_Z9_109) |
| .long 1, 0xc100efc2 |
| #elif defined(CONFIG_MARCH_Z990) |
| .long 1, 0xc0002000 |
| #elif defined(CONFIG_MARCH_Z900) |
| .long 1, 0xc0000000 |
| #endif |
| 4: |
| /* Continue with 64bit startup code in head64.S */ |
| sam64 # switch to 64 bit mode |
| jg startup_continue |
| |
| .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 |
