| /* |
| * arch/s390/kernel/base.S |
| * |
| * Copyright IBM Corp. 2006,2007 |
| * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com> |
| * Michael Holzheu <holzheu@de.ibm.com> |
| */ |
| |
| #include <linux/linkage.h> |
| #include <asm/asm-offsets.h> |
| #include <asm/ptrace.h> |
| |
| #ifdef CONFIG_64BIT |
| |
| ENTRY(s390_base_mcck_handler) |
| basr %r13,0 |
| 0: lg %r15,__LC_PANIC_STACK # load panic stack |
| aghi %r15,-STACK_FRAME_OVERHEAD |
| larl %r1,s390_base_mcck_handler_fn |
| lg %r1,0(%r1) |
| ltgr %r1,%r1 |
| jz 1f |
| basr %r14,%r1 |
| 1: la %r1,4095 |
| lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1) |
| lpswe __LC_MCK_OLD_PSW |
| |
| .section .bss |
| .align 8 |
| .globl s390_base_mcck_handler_fn |
| s390_base_mcck_handler_fn: |
| .quad 0 |
| .previous |
| |
| ENTRY(s390_base_ext_handler) |
| stmg %r0,%r15,__LC_SAVE_AREA |
| basr %r13,0 |
| 0: aghi %r15,-STACK_FRAME_OVERHEAD |
| larl %r1,s390_base_ext_handler_fn |
| lg %r1,0(%r1) |
| ltgr %r1,%r1 |
| jz 1f |
| basr %r14,%r1 |
| 1: lmg %r0,%r15,__LC_SAVE_AREA |
| ni __LC_EXT_OLD_PSW+1,0xfd # clear wait state bit |
| lpswe __LC_EXT_OLD_PSW |
| |
| .section .bss |
| .align 8 |
| .globl s390_base_ext_handler_fn |
| s390_base_ext_handler_fn: |
| .quad 0 |
| .previous |
| |
| ENTRY(s390_base_pgm_handler) |
| stmg %r0,%r15,__LC_SAVE_AREA |
| basr %r13,0 |
| 0: aghi %r15,-STACK_FRAME_OVERHEAD |
| larl %r1,s390_base_pgm_handler_fn |
| lg %r1,0(%r1) |
| ltgr %r1,%r1 |
| jz 1f |
| basr %r14,%r1 |
| lmg %r0,%r15,__LC_SAVE_AREA |
| lpswe __LC_PGM_OLD_PSW |
| 1: lpswe disabled_wait_psw-0b(%r13) |
| |
| .align 8 |
| disabled_wait_psw: |
| .quad 0x0002000180000000,0x0000000000000000 + s390_base_pgm_handler |
| |
| .section .bss |
| .align 8 |
| .globl s390_base_pgm_handler_fn |
| s390_base_pgm_handler_fn: |
| .quad 0 |
| .previous |
| |
| # |
| # Calls diag 308 subcode 1 and continues execution |
| # |
| # The following conditions must be ensured before calling this function: |
| # * Prefix register = 0 |
| # * Lowcore protection is disabled |
| # |
| ENTRY(diag308_reset) |
| larl %r4,.Lctlregs # Save control registers |
| stctg %c0,%c15,0(%r4) |
| larl %r4,.Lfpctl # Floating point control register |
| stfpc 0(%r4) |
| larl %r4,.Lrestart_psw # Setup restart PSW at absolute 0 |
| lghi %r3,0 |
| lg %r4,0(%r4) # Save PSW |
| sturg %r4,%r3 # Use sturg, because of large pages |
| lghi %r1,1 |
| diag %r1,%r1,0x308 |
| .Lrestart_part2: |
| lhi %r0,0 # Load r0 with zero |
| lhi %r1,2 # Use mode 2 = ESAME (dump) |
| sigp %r1,%r0,0x12 # Switch to ESAME mode |
| sam64 # Switch to 64 bit addressing mode |
| larl %r4,.Lctlregs # Restore control registers |
| lctlg %c0,%c15,0(%r4) |
| larl %r4,.Lfpctl # Restore floating point ctl register |
| lfpc 0(%r4) |
| br %r14 |
| .align 16 |
| .Lrestart_psw: |
| .long 0x00080000,0x80000000 + .Lrestart_part2 |
| |
| .section .bss |
| .align 8 |
| .Lctlregs: |
| .rept 16 |
| .quad 0 |
| .endr |
| .Lfpctl: |
| .long 0 |
| .previous |
| |
| #else /* CONFIG_64BIT */ |
| |
| ENTRY(s390_base_mcck_handler) |
| basr %r13,0 |
| 0: l %r15,__LC_PANIC_STACK # load panic stack |
| ahi %r15,-STACK_FRAME_OVERHEAD |
| l %r1,2f-0b(%r13) |
| l %r1,0(%r1) |
| ltr %r1,%r1 |
| jz 1f |
| basr %r14,%r1 |
| 1: lm %r0,%r15,__LC_GPREGS_SAVE_AREA |
| lpsw __LC_MCK_OLD_PSW |
| |
| 2: .long s390_base_mcck_handler_fn |
| |
| .section .bss |
| .align 4 |
| .globl s390_base_mcck_handler_fn |
| s390_base_mcck_handler_fn: |
| .long 0 |
| .previous |
| |
| ENTRY(s390_base_ext_handler) |
| stm %r0,%r15,__LC_SAVE_AREA |
| basr %r13,0 |
| 0: ahi %r15,-STACK_FRAME_OVERHEAD |
| l %r1,2f-0b(%r13) |
| l %r1,0(%r1) |
| ltr %r1,%r1 |
| jz 1f |
| basr %r14,%r1 |
| 1: lm %r0,%r15,__LC_SAVE_AREA |
| ni __LC_EXT_OLD_PSW+1,0xfd # clear wait state bit |
| lpsw __LC_EXT_OLD_PSW |
| |
| 2: .long s390_base_ext_handler_fn |
| |
| .section .bss |
| .align 4 |
| .globl s390_base_ext_handler_fn |
| s390_base_ext_handler_fn: |
| .long 0 |
| .previous |
| |
| ENTRY(s390_base_pgm_handler) |
| stm %r0,%r15,__LC_SAVE_AREA |
| basr %r13,0 |
| 0: ahi %r15,-STACK_FRAME_OVERHEAD |
| l %r1,2f-0b(%r13) |
| l %r1,0(%r1) |
| ltr %r1,%r1 |
| jz 1f |
| basr %r14,%r1 |
| lm %r0,%r15,__LC_SAVE_AREA |
| lpsw __LC_PGM_OLD_PSW |
| |
| 1: lpsw disabled_wait_psw-0b(%r13) |
| |
| 2: .long s390_base_pgm_handler_fn |
| |
| disabled_wait_psw: |
| .align 8 |
| .long 0x000a0000,0x00000000 + s390_base_pgm_handler |
| |
| .section .bss |
| .align 4 |
| .globl s390_base_pgm_handler_fn |
| s390_base_pgm_handler_fn: |
| .long 0 |
| .previous |
| |
| #endif /* CONFIG_64BIT */ |