diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 17:02:14 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 17:02:14 (GMT) |
commit | 9fd815b55f31be48dbb3dd23922587d247a4e497 (patch) | |
tree | 63814130acf3e472cc660ae71208c146f16dc5d6 /arch/s390/kernel/swsusp_asm64.S | |
parent | 31bbb9b58d1e8ebcf2b28c95c2250a9f8e31e397 (diff) | |
parent | ed87b27e00d2ca240f62f3903583a2f1541fb9ef (diff) | |
download | linux-fsl-qoriq-9fd815b55f31be48dbb3dd23922587d247a4e497.tar.xz |
Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (22 commits)
[S390] Update default configuration.
[S390] hibernate: Do real CPU swap at resume time
[S390] dasd: tolerate devices that have no feature codes
[S390] zcrypt: Do not add/remove devices in s/r callbacks
[S390] hibernate: make sure pfn_is_nosave handles lowcore pages
[S390] smp: introduce LC_ORDER and simplify lowcore handling
[S390] ptrace: use common code for simple peek/poke operations
[S390] fix disabled_wait inline assembly clobber list
[S390] Change kernel_page_present coding style.
[S390] hibernation: reset system after resume
[S390] hibernation: fix guest page hinting related crash
[S390] Get rid of init_module/delete_module compat functions.
[S390] Convert sys_execve to function with parameters.
[S390] Convert sys_clone to function with parameters.
[S390] qdio: change state of all primed input buffers
[S390] qdio: reduce per device debug messages
[S390] cio: introduce consistent subchannel scanning
[S390] cio: idset use actual number of ssids
[S390] cio: dont kfree vmalloced memory
[S390] cio: introduce css_settle
...
Diffstat (limited to 'arch/s390/kernel/swsusp_asm64.S')
-rw-r--r-- | arch/s390/kernel/swsusp_asm64.S | 102 |
1 files changed, 91 insertions, 11 deletions
diff --git a/arch/s390/kernel/swsusp_asm64.S b/arch/s390/kernel/swsusp_asm64.S index 7cd6b09..fe927d0 100644 --- a/arch/s390/kernel/swsusp_asm64.S +++ b/arch/s390/kernel/swsusp_asm64.S @@ -9,6 +9,7 @@ #include <asm/page.h> #include <asm/ptrace.h> +#include <asm/thread_info.h> #include <asm/asm-offsets.h> /* @@ -41,6 +42,9 @@ swsusp_arch_suspend: /* Get pointer to save area */ lghi %r1,0x1000 + /* Save CPU address */ + stap __LC_CPU_ADDRESS(%r1) + /* Store registers */ mvc 0x318(4,%r1),__SF_EMPTY(%r15) /* move prefix to lowcore */ stfpc 0x31c(%r1) /* store fpu control */ @@ -102,11 +106,10 @@ swsusp_arch_resume: aghi %r15,-STACK_FRAME_OVERHEAD stg %r1,__SF_BACKCHAIN(%r15) -#ifdef CONFIG_SMP - /* Save boot cpu number */ - brasl %r14,smp_get_phys_cpu_id - lgr %r10,%r2 -#endif + /* Make all free pages stable */ + lghi %r2,1 + brasl %r14,arch_set_page_states + /* Deactivate DAT */ stnsm __SF_EMPTY(%r15),0xfb @@ -133,6 +136,69 @@ swsusp_arch_resume: 2: ptlb /* flush tlb */ + /* Reset System */ + larl %r1,restart_entry + larl %r2,.Lrestart_diag308_psw + og %r1,0(%r2) + stg %r1,0(%r0) + larl %r1,.Lnew_pgm_check_psw + epsw %r2,%r3 + stm %r2,%r3,0(%r1) + mvc __LC_PGM_NEW_PSW(16,%r0),0(%r1) + lghi %r0,0 + diag %r0,%r0,0x308 +restart_entry: + lhi %r1,1 + sigp %r1,%r0,0x12 + sam64 + larl %r1,.Lnew_pgm_check_psw + lpswe 0(%r1) +pgm_check_entry: + + /* Switch to original suspend CPU */ + larl %r1,.Lresume_cpu /* Resume CPU address: r2 */ + stap 0(%r1) + llgh %r2,0(%r1) + lghi %r3,0x1000 + llgh %r1,__LC_CPU_ADDRESS(%r3) /* Suspend CPU address: r1 */ + cgr %r1,%r2 + je restore_registers /* r1 = r2 -> nothing to do */ + larl %r4,.Lrestart_suspend_psw /* Set new restart PSW */ + mvc __LC_RESTART_PSW(16,%r0),0(%r4) +3: + sigp %r9,%r1,__SIGP_INITIAL_CPU_RESET + brc 8,4f /* accepted */ + brc 2,3b /* busy, try again */ + + /* Suspend CPU not available -> panic */ + larl %r15,init_thread_union + ahi %r15,1<<(PAGE_SHIFT+THREAD_ORDER) + larl %r2,.Lpanic_string + larl %r3,_sclp_print_early + lghi %r1,0 + sam31 + sigp %r1,%r0,0x12 + basr %r14,%r3 + larl %r3,.Ldisabled_wait_31 + lpsw 0(%r3) +4: + /* Switch to suspend CPU */ + sigp %r9,%r1,__SIGP_RESTART /* start suspend CPU */ + brc 2,4b /* busy, try again */ +5: + sigp %r9,%r2,__SIGP_STOP /* stop resume (current) CPU */ +6: j 6b + +restart_suspend: + larl %r1,.Lresume_cpu + llgh %r2,0(%r1) +7: + sigp %r9,%r2,__SIGP_SENSE /* Wait for resume CPU */ + brc 2,7b /* busy, try again */ + tmll %r9,0x40 /* Test if resume CPU is stopped */ + jz 7b + +restore_registers: /* Restore registers */ lghi %r13,0x1000 /* %r1 = pointer to save arae */ @@ -166,19 +232,33 @@ swsusp_arch_resume: /* Pointer to save area */ lghi %r13,0x1000 -#ifdef CONFIG_SMP - /* Switch CPUs */ - lgr %r2,%r10 /* get cpu id */ - llgf %r3,0x318(%r13) - brasl %r14,smp_switch_boot_cpu_in_resume -#endif /* Restore prefix register */ spx 0x318(%r13) /* Activate DAT */ stosm __SF_EMPTY(%r15),0x04 + /* Make all free pages unstable */ + lghi %r2,0 + brasl %r14,arch_set_page_states + /* Return 0 */ lmg %r6,%r15,STACK_FRAME_OVERHEAD + __SF_GPRS(%r15) lghi %r2,0 br %r14 + + .section .data.nosave,"aw",@progbits + .align 8 +.Ldisabled_wait_31: + .long 0x000a0000,0x00000000 +.Lpanic_string: + .asciz "Resume not possible because suspend CPU is no longer available" + .align 8 +.Lrestart_diag308_psw: + .long 0x00080000,0x80000000 +.Lrestart_suspend_psw: + .quad 0x0000000180000000,restart_suspend +.Lnew_pgm_check_psw: + .quad 0,pgm_check_entry +.Lresume_cpu: + .byte 0,0 |