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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2017-06-24 14:17:25 -0500 |
|---|---|---|
| committer | Stewart Smith <stewart@linux.vnet.ibm.com> | 2017-06-26 14:28:58 +1000 |
| commit | b137ad45d298644a3c34047b2072b74bc7ec9c26 (patch) | |
| tree | 958f611f5d812069204bb010750b7b6d99af453e | |
| parent | 2c44b08555be662bc993401412317db253385d4a (diff) | |
| download | skiboot-b137ad45d298644a3c34047b2072b74bc7ec9c26.zip skiboot-b137ad45d298644a3c34047b2072b74bc7ec9c26.tar.gz skiboot-b137ad45d298644a3c34047b2072b74bc7ec9c26.tar.bz2 | |
Add "cleanup_global_tlb" for P9 and later
Uses broadcast TLBIE's to cleanup the TLB on all cores and on
the nest MMU
By default this works with older binutils but there is a version (in
#defines) that requires newer binutils and which documents what the
instructions are.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
| -rw-r--r-- | asm/misc.S | 60 | ||||
| -rw-r--r-- | include/skiboot.h | 1 |
2 files changed, 61 insertions, 0 deletions
@@ -19,6 +19,8 @@ #include <processor.h> #include <stack.h> +#define OLD_BINUTILS 1 + .section ".text","ax" .balign 0x10 @@ -63,3 +65,61 @@ cleanup_local_tlb: bdnz 1b ptesync blr + + .global cleanup_global_tlb +cleanup_global_tlb: + + /* Only supported on P9 for now */ + mfspr %r3,SPR_PVR + srdi %r3,%r3,16 + cmpwi cr0,%r3,PVR_TYPE_P9 + bnelr + + /* Sync out previous updates */ + ptesync + +#ifndef OLD_BINUTILS + .machine "power9" +#endif + /* Lead RB with IS=11 */ + li %r3,3 + sldi %r3,%r3,10 + li %r0,0 + + /* Blow up radix partition scoped translations */ +#ifdef OLD_BINUTILS + .long 0x7c0b1a64 +#else + tlbie %r3, %r0 /* rs */, 2 /* ric */, 1 /* prs */, 1 /* r */ +#endif + eieio + tlbsync + ptesync +#ifdef OLD_BINUTILS + .long 0x7c091a64 +#else + tlbie %r3, %r0 /* rs */, 2 /* ric */, 0 /* prs */, 1 /* r */ +#endif + eieio + tlbsync + ptesync + + /* Blow up hash partition scoped translations */ +#ifdef OLD_BINUTILS + .long 0x7c0a1a64 +#else + tlbie %r3, %r0 /* rs */, 2 /* ric */, 1 /* prs */, 0 /* r */ +#endif + eieio + tlbsync + ptesync +#ifdef OLD_BINUTILS + .long 0x7c081a64 +#else + tlbie %r3, %r0 /* rs */, 2 /* ric */, 0 /* prs */, 0 /* r */ +#endif + eieio + tlbsync + ptesync + + blr diff --git a/include/skiboot.h b/include/skiboot.h index 87d8503..1a153b0 100644 --- a/include/skiboot.h +++ b/include/skiboot.h @@ -204,6 +204,7 @@ extern void fast_reboot(void); extern void __noreturn __secondary_cpu_entry(void); extern void __noreturn load_and_boot_kernel(bool is_reboot); extern void cleanup_local_tlb(void); +extern void cleanup_global_tlb(void); extern void init_shared_sprs(void); extern void init_replicated_sprs(void); extern bool start_preload_kernel(void); |