2 * arch/s390/kernel/base.S
4 * Copyright IBM Corp. 2006, 2007
5 * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
6 * Michael Holzheu <holzheu@de.ibm.com>
9 #include <linux/linkage.h>
10 #include <asm/asm-offsets.h>
11 #include <asm/nospec-insn.h>
12 #include <asm/ptrace.h>
18 ENTRY(s390_base_mcck_handler)
20 0: lg %r15,__LC_PANIC_STACK # load panic stack
21 aghi %r15,-STACK_FRAME_OVERHEAD
22 larl %r1,s390_base_mcck_handler_fn
28 lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)
29 lpswe __LC_MCK_OLD_PSW
33 .globl s390_base_mcck_handler_fn
34 s390_base_mcck_handler_fn:
38 ENTRY(s390_base_ext_handler)
39 stmg %r0,%r15,__LC_SAVE_AREA_ASYNC
41 0: aghi %r15,-STACK_FRAME_OVERHEAD
42 larl %r1,s390_base_ext_handler_fn
47 1: lmg %r0,%r15,__LC_SAVE_AREA_ASYNC
48 ni __LC_EXT_OLD_PSW+1,0xfd # clear wait state bit
49 lpswe __LC_EXT_OLD_PSW
53 .globl s390_base_ext_handler_fn
54 s390_base_ext_handler_fn:
58 ENTRY(s390_base_pgm_handler)
59 stmg %r0,%r15,__LC_SAVE_AREA_SYNC
61 0: aghi %r15,-STACK_FRAME_OVERHEAD
62 larl %r1,s390_base_pgm_handler_fn
67 lmg %r0,%r15,__LC_SAVE_AREA_SYNC
68 lpswe __LC_PGM_OLD_PSW
69 1: lpswe disabled_wait_psw-0b(%r13)
73 .quad 0x0002000180000000,0x0000000000000000 + s390_base_pgm_handler
77 .globl s390_base_pgm_handler_fn
78 s390_base_pgm_handler_fn:
83 # Calls diag 308 subcode 1 and continues execution
86 larl %r4,.Lctlregs # Save control registers
88 lg %r2,0(%r4) # Disable lowcore protection
93 larl %r4,.Lfpctl # Floating point control register
95 larl %r4,.Lprefix # Save prefix register
97 larl %r4,.Lprefix_zero # Set prefix register to 0
99 larl %r4,.Lcontinue_psw # Save PSW flags
102 larl %r4,.Lrestart_psw # Setup restart PSW at absolute 0
104 lg %r4,0(%r4) # Save PSW
105 sturg %r4,%r3 # Use sturg, because of large pages
110 lhi %r0,0 # Load r0 with zero
111 lhi %r1,2 # Use mode 2 = ESAME (dump)
112 sigp %r1,%r0,SIGP_SET_ARCHITECTURE # Switch to ESAME mode
113 sam64 # Switch to 64 bit addressing mode
114 larl %r4,.Lctlregs # Restore control registers
115 lctlg %c0,%c15,0(%r4)
116 larl %r4,.Lfpctl # Restore floating point ctl register
118 larl %r4,.Lprefix # Restore prefix register
120 larl %r4,.Lcontinue_psw # Restore PSW flags
126 .long 0x00080000,0x80000000 + .Lrestart_part2
128 .section .data..nosave,"aw",@progbits