diff options
Diffstat (limited to 'arch/powerpc/kernel/idle_book3s.S')
| -rw-r--r-- | arch/powerpc/kernel/idle_book3s.S | 27 |
1 files changed, 10 insertions, 17 deletions
diff --git a/arch/powerpc/kernel/idle_book3s.S b/arch/powerpc/kernel/idle_book3s.S index 99de9de7efe7..a80d76f9e961 100644 --- a/arch/powerpc/kernel/idle_book3s.S +++ b/arch/powerpc/kernel/idle_book3s.S @@ -415,11 +415,12 @@ power9_dd1_recover_paca: stb r0,PACA_NAPSTATELOST(r13) blr +/* + * Called from reset vector for powersave wakeups. + * cr3 - set to gt if waking up with partial/complete hypervisor state loss + */ .global pnv_powersave_wakeup pnv_powersave_wakeup: -BEGIN_FTR_SECTION - GET_PACA(r13) /* Restore HSPRG0 to get the winkle bit in r13 */ -END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_300) bl pnv_restore_hyp_resource li r0,PNV_THREAD_RUNNING @@ -446,18 +447,18 @@ END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_300) * Check whether we have woken up with hypervisor state loss. * If yes, restore hypervisor state and return back to link. * - * r13 - Contents of HSPRG0 * cr3 - set to gt if waking up with partial/complete hypervisor state loss */ pnv_restore_hyp_resource: BEGIN_FTR_SECTION -BEGIN_FTR_SECTION_NESTED(70) mflr r6 bl power9_dd1_recover_paca mtlr r6 -FTR_SECTION_ELSE_NESTED(70) +FTR_SECTION_ELSE ld r2, PACATOC(r13) -ALT_FTR_SECTION_END_NESTED_IFSET(CPU_FTR_POWER9_DD1, 70) +ALT_FTR_SECTION_END_IFSET(CPU_FTR_POWER9_DD1) + +BEGIN_FTR_SECTION /* * POWER ISA 3. Use PSSCR to determine if we * are waking up from deep idle state @@ -480,19 +481,11 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300) /* * POWER ISA 2.07 or less. - * Check if last bit of HSPGR0 is set. This indicates whether we are - * waking up from winkle. + * Check if we slept with winkle. */ - clrldi r5,r13,63 - clrrdi r13,r13,1 - - /* Now that we are sure r13 is corrected, load TOC */ - ld r2,PACATOC(r13); - cmpwi cr4,r5,1 - mtspr SPRN_HSPRG0,r13 - lbz r0,PACA_THREAD_IDLE_STATE(r13) cmpwi cr2,r0,PNV_THREAD_NAP + cmpwi cr4,r0,PNV_THREAD_WINKLE bgt cr2,pnv_wakeup_tb_loss /* Either sleep or Winkle */ /* |