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| author | Paul Mundt <lethal@linux-sh.org> | 2011-08-08 13:45:28 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2011-08-08 13:45:28 +0900 |
| commit | 77c7ee51a062bb595c501ec098125a68999c20c3 (patch) | |
| tree | c5060ca5786ef353e005dae04b61d2c49967284d /arch/s390/kernel/entry.S | |
| parent | 1ba762209491e2496e58baffa3fd65d661f54404 (diff) | |
| parent | 322a8b034003c0d46d39af85bf24fee27b902f48 (diff) | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into sh-latest
Conflicts:
drivers/tty/serial/sh-sci.c
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/s390/kernel/entry.S')
| -rw-r--r-- | arch/s390/kernel/entry.S | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index 3eab7cfab07..02ec8fe7d03 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -849,6 +849,34 @@ restart_crash: restart_go: #endif +# +# PSW restart interrupt handler +# +ENTRY(psw_restart_int_handler) + st %r15,__LC_SAVE_AREA_64(%r0) # save r15 + basr %r15,0 +0: l %r15,.Lrestart_stack-0b(%r15) # load restart stack + l %r15,0(%r15) + ahi %r15,-SP_SIZE # make room for pt_regs + stm %r0,%r14,SP_R0(%r15) # store gprs %r0-%r14 to stack + mvc SP_R15(4,%r15),__LC_SAVE_AREA_64(%r0)# store saved %r15 to stack + mvc SP_PSW(8,%r15),__LC_RST_OLD_PSW(%r0) # store restart old psw + xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) # set backchain to 0 + basr %r14,0 +1: l %r14,.Ldo_restart-1b(%r14) + basr %r14,%r14 + + basr %r14,0 # load disabled wait PSW if +2: lpsw restart_psw_crash-2b(%r14) # do_restart returns + .align 4 +.Ldo_restart: + .long do_restart +.Lrestart_stack: + .long restart_stack + .align 8 +restart_psw_crash: + .long 0x000a0000,0x00000000 + restart_psw_crash + .section .kprobes.text, "ax" #ifdef CONFIG_CHECK_STACK |