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linux/arch/sparc64/mm/ultra.S

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
/* $Id: ultra.S,v 1.72 2002/02/09 19:49:31 davem Exp $
* ultra.S: Don't expand these all over the place...
*
* Copyright (C) 1997, 2000 David S. Miller (davem@redhat.com)
*/
#include <linux/config.h>
#include <asm/asi.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/spitfire.h>
#include <asm/mmu_context.h>
[SPARC64]: Preserve nucleus ctx page size during TLB flushes. Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-31 03:21:34 +00:00
#include <asm/mmu.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
#include <asm/pil.h>
#include <asm/head.h>
#include <asm/thread_info.h>
#include <asm/cacheflush.h>
/* Basically, most of the Spitfire vs. Cheetah madness
* has to do with the fact that Cheetah does not support
* IMMU flushes out of the secondary context. Someone needs
* to throw a south lake birthday party for the folks
* in Microelectronics who refused to fix this shit.
*/
/* This file is meant to be read efficiently by the CPU, not humans.
* Staraj sie tego nikomu nie pierdolnac...
*/
.text
.align 32
.globl __flush_tlb_mm
__flush_tlb_mm: /* %o0=(ctx & TAG_CONTEXT_BITS), %o1=SECONDARY_CONTEXT */
ldxa [%o1] ASI_DMMU, %g2
cmp %g2, %o0
bne,pn %icc, __spitfire_flush_tlb_mm_slow
mov 0x50, %g3
stxa %g0, [%g3] ASI_DMMU_DEMAP
stxa %g0, [%g3] ASI_IMMU_DEMAP
[SPARC64]: Fix bogus flush instruction usage. Some of the trap code was still assuming that alternate global %g6 was hard coded with current_thread_info(). Let's just consistently flush at KERNBASE when we need a pipeline synchronization. That's locked into the TLB and will always work. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-01 02:33:00 +00:00
sethi %hi(KERNBASE), %g3
flush %g3
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
retl
[SPARC64]: Fix bogus flush instruction usage. Some of the trap code was still assuming that alternate global %g6 was hard coded with current_thread_info(). Let's just consistently flush at KERNBASE when we need a pipeline synchronization. That's locked into the TLB and will always work. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-01 02:33:00 +00:00
nop
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
nop
nop
nop
nop
nop
nop
nop
[SPARC64]: Preserve nucleus ctx page size during TLB flushes. Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-31 03:21:34 +00:00
nop
nop
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
.align 32
.globl __flush_tlb_pending
__flush_tlb_pending:
/* %o0 = context, %o1 = nr, %o2 = vaddrs[] */
rdpr %pstate, %g7
sllx %o1, 3, %o1
andn %g7, PSTATE_IE, %g2
wrpr %g2, %pstate
mov SECONDARY_CONTEXT, %o4
ldxa [%o4] ASI_DMMU, %g2
stxa %o0, [%o4] ASI_DMMU
1: sub %o1, (1 << 3), %o1
ldx [%o2 + %o1], %o3
andcc %o3, 1, %g0
andn %o3, 1, %o3
be,pn %icc, 2f
or %o3, 0x10, %o3
stxa %g0, [%o3] ASI_IMMU_DEMAP
2: stxa %g0, [%o3] ASI_DMMU_DEMAP
membar #Sync
brnz,pt %o1, 1b
nop
stxa %g2, [%o4] ASI_DMMU
[SPARC64]: Fix bogus flush instruction usage. Some of the trap code was still assuming that alternate global %g6 was hard coded with current_thread_info(). Let's just consistently flush at KERNBASE when we need a pipeline synchronization. That's locked into the TLB and will always work. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-01 02:33:00 +00:00
sethi %hi(KERNBASE), %o4
flush %o4
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
retl
wrpr %g7, 0x0, %pstate
[SPARC64]: Fix UltraSPARC-III fallout from membar changes. The membar changes made the size of __cheetah_flush_tlb_pending grow by one instruction, but the boot-time code patching was not updated to match. Signed-off-by: David S. Miller <davem@davemloft.net>
2005-07-06 02:45:24 +00:00
nop
[SPARC64]: Preserve nucleus ctx page size during TLB flushes. Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-31 03:21:34 +00:00
nop
nop
nop
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
.align 32
.globl __flush_tlb_kernel_range
__flush_tlb_kernel_range: /* %o0=start, %o1=end */
cmp %o0, %o1
be,pn %xcc, 2f
sethi %hi(PAGE_SIZE), %o4
sub %o1, %o0, %o3
sub %o3, %o4, %o3
or %o0, 0x20, %o0 ! Nucleus
1: stxa %g0, [%o0 + %o3] ASI_DMMU_DEMAP
stxa %g0, [%o0 + %o3] ASI_IMMU_DEMAP
membar #Sync
brnz,pt %o3, 1b
sub %o3, %o4, %o3
[SPARC64]: Fix bogus flush instruction usage. Some of the trap code was still assuming that alternate global %g6 was hard coded with current_thread_info(). Let's just consistently flush at KERNBASE when we need a pipeline synchronization. That's locked into the TLB and will always work. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-01 02:33:00 +00:00
2: sethi %hi(KERNBASE), %o3
flush %o3
retl
nop
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
__spitfire_flush_tlb_mm_slow:
rdpr %pstate, %g1
wrpr %g1, PSTATE_IE, %pstate
stxa %o0, [%o1] ASI_DMMU
stxa %g0, [%g3] ASI_DMMU_DEMAP
stxa %g0, [%g3] ASI_IMMU_DEMAP
flush %g6
stxa %g2, [%o1] ASI_DMMU
[SPARC64]: Fix bogus flush instruction usage. Some of the trap code was still assuming that alternate global %g6 was hard coded with current_thread_info(). Let's just consistently flush at KERNBASE when we need a pipeline synchronization. That's locked into the TLB and will always work. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-01 02:33:00 +00:00
sethi %hi(KERNBASE), %o1
flush %o1
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
retl
wrpr %g1, 0, %pstate
/*
* The following code flushes one page_size worth.
*/
#if (PAGE_SHIFT == 13)
#define ITAG_MASK 0xfe
#elif (PAGE_SHIFT == 16)
#define ITAG_MASK 0x7fe
#else
#error unsupported PAGE_SIZE
#endif
[PATCH] kprobes-prevent-possible-race-conditions-sparc64-changes fix This patch adds flags "ax" to .kprobe.text section. Signed-off-by: Prasanna S Panchamukhi <prasanna@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-06 22:19:31 +00:00
.section .kprobes.text, "ax"
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
.align 32
.globl __flush_icache_page
__flush_icache_page: /* %o0 = phys_page */
membar #StoreStore
srlx %o0, PAGE_SHIFT, %o0
sethi %uhi(PAGE_OFFSET), %g1
sllx %o0, PAGE_SHIFT, %o0
sethi %hi(PAGE_SIZE), %g2
sllx %g1, 32, %g1
add %o0, %g1, %o0
1: subcc %g2, 32, %g2
bne,pt %icc, 1b
flush %o0 + %g2
retl
nop
#ifdef DCACHE_ALIASING_POSSIBLE
#if (PAGE_SHIFT != 13)
#error only page shift of 13 is supported by dcache flush
#endif
#define DTAG_MASK 0x3
[SPARC64]: Simplify Spitfire D-cache page flush. It tries to batch up the tag loads and comparisons, and then the stores. And this is just complicated instead of efficient. Also, make the symbol of the Cheetah version more grepable. Signed-off-by: David S. Miller <davem@davemloft.net>
2005-09-26 23:06:03 +00:00
/* This routine is Spitfire specific so the hardcoded
* D-cache size and line-size are OK.
*/
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
.align 64
.globl __flush_dcache_page
__flush_dcache_page: /* %o0=kaddr, %o1=flush_icache */
sethi %uhi(PAGE_OFFSET), %g1
sllx %g1, 32, %g1
[SPARC64]: Simplify Spitfire D-cache page flush. It tries to batch up the tag loads and comparisons, and then the stores. And this is just complicated instead of efficient. Also, make the symbol of the Cheetah version more grepable. Signed-off-by: David S. Miller <davem@davemloft.net>
2005-09-26 23:06:03 +00:00
sub %o0, %g1, %o0 ! physical address
srlx %o0, 11, %o0 ! make D-cache TAG
sethi %hi(1 << 14), %o2 ! D-cache size
sub %o2, (1 << 5), %o2 ! D-cache line size
1: ldxa [%o2] ASI_DCACHE_TAG, %o3 ! load D-cache TAG
andcc %o3, DTAG_MASK, %g0 ! Valid?
be,pn %xcc, 2f ! Nope, branch
andn %o3, DTAG_MASK, %o3 ! Clear valid bits
cmp %o3, %o0 ! TAG match?
bne,pt %xcc, 2f ! Nope, branch
nop
stxa %g0, [%o2] ASI_DCACHE_TAG ! Invalidate TAG
membar #Sync
2: brnz,pt %o2, 1b
sub %o2, (1 << 5), %o2 ! D-cache line size
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
/* The I-cache does not snoop local stores so we
* better flush that too when necessary.
*/
brnz,pt %o1, __flush_icache_page
sllx %o0, 11, %o0
retl
nop
#endif /* DCACHE_ALIASING_POSSIBLE */
[SPARC64]: Simplify Spitfire D-cache page flush. It tries to batch up the tag loads and comparisons, and then the stores. And this is just complicated instead of efficient. Also, make the symbol of the Cheetah version more grepable. Signed-off-by: David S. Miller <davem@davemloft.net>
2005-09-26 23:06:03 +00:00
.previous
[SPARC64]: Preserve nucleus ctx page size during TLB flushes. Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-31 03:21:34 +00:00
/* Cheetah specific versions, patched at boot time. */
[SPARC64]: Fix bogus flush instruction usage. Some of the trap code was still assuming that alternate global %g6 was hard coded with current_thread_info(). Let's just consistently flush at KERNBASE when we need a pipeline synchronization. That's locked into the TLB and will always work. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-01 02:33:00 +00:00
__cheetah_flush_tlb_mm: /* 19 insns */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
rdpr %pstate, %g7
andn %g7, PSTATE_IE, %g2
wrpr %g2, 0x0, %pstate
wrpr %g0, 1, %tl
mov PRIMARY_CONTEXT, %o2
mov 0x40, %g3
ldxa [%o2] ASI_DMMU, %g2
[SPARC64]: Preserve nucleus ctx page size during TLB flushes. Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-31 03:21:34 +00:00
srlx %g2, CTX_PGSZ1_NUC_SHIFT, %o1
sllx %o1, CTX_PGSZ1_NUC_SHIFT, %o1
or %o0, %o1, %o0 /* Preserve nucleus page size fields */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
stxa %o0, [%o2] ASI_DMMU
stxa %g0, [%g3] ASI_DMMU_DEMAP
stxa %g0, [%g3] ASI_IMMU_DEMAP
stxa %g2, [%o2] ASI_DMMU
[SPARC64]: Fix bogus flush instruction usage. Some of the trap code was still assuming that alternate global %g6 was hard coded with current_thread_info(). Let's just consistently flush at KERNBASE when we need a pipeline synchronization. That's locked into the TLB and will always work. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-01 02:33:00 +00:00
sethi %hi(KERNBASE), %o2
flush %o2
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
wrpr %g0, 0, %tl
retl
wrpr %g7, 0x0, %pstate
[SPARC64]: Fix bogus flush instruction usage. Some of the trap code was still assuming that alternate global %g6 was hard coded with current_thread_info(). Let's just consistently flush at KERNBASE when we need a pipeline synchronization. That's locked into the TLB and will always work. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-01 02:33:00 +00:00
__cheetah_flush_tlb_pending: /* 27 insns */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
/* %o0 = context, %o1 = nr, %o2 = vaddrs[] */
rdpr %pstate, %g7
sllx %o1, 3, %o1
andn %g7, PSTATE_IE, %g2
wrpr %g2, 0x0, %pstate
wrpr %g0, 1, %tl
mov PRIMARY_CONTEXT, %o4
ldxa [%o4] ASI_DMMU, %g2
[SPARC64]: Preserve nucleus ctx page size during TLB flushes. Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-31 03:21:34 +00:00
srlx %g2, CTX_PGSZ1_NUC_SHIFT, %o3
sllx %o3, CTX_PGSZ1_NUC_SHIFT, %o3
or %o0, %o3, %o0 /* Preserve nucleus page size fields */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
stxa %o0, [%o4] ASI_DMMU
1: sub %o1, (1 << 3), %o1
ldx [%o2 + %o1], %o3
andcc %o3, 1, %g0
be,pn %icc, 2f
andn %o3, 1, %o3
stxa %g0, [%o3] ASI_IMMU_DEMAP
2: stxa %g0, [%o3] ASI_DMMU_DEMAP
[SPARC64]: Avoid membar instructions in delay slots. In particular, avoid membar instructions in the delay slot of a jmpl instruction. UltraSPARC-I, II, IIi, and IIe have a bug, documented in the UltraSPARC-IIi User's Manual, Appendix K, Erratum 51 The long and short of it is that if the IMU unit misses on a branch or jmpl, and there is a store buffer synchronizing membar in the delay slot, the chip can stop fetching instructions. If interrupts are enabled or some other trap is enabled, the chip will unwedge itself, but performance will suffer. We already had a workaround for this bug in a few spots, but it's better to have the entire tree sanitized for this rule. Signed-off-by: David S. Miller <davem@davemloft.net>
2005-06-27 22:42:04 +00:00
membar #Sync
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
brnz,pt %o1, 1b
[SPARC64]: Avoid membar instructions in delay slots. In particular, avoid membar instructions in the delay slot of a jmpl instruction. UltraSPARC-I, II, IIi, and IIe have a bug, documented in the UltraSPARC-IIi User's Manual, Appendix K, Erratum 51 The long and short of it is that if the IMU unit misses on a branch or jmpl, and there is a store buffer synchronizing membar in the delay slot, the chip can stop fetching instructions. If interrupts are enabled or some other trap is enabled, the chip will unwedge itself, but performance will suffer. We already had a workaround for this bug in a few spots, but it's better to have the entire tree sanitized for this rule. Signed-off-by: David S. Miller <davem@davemloft.net>
2005-06-27 22:42:04 +00:00
nop
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
stxa %g2, [%o4] ASI_DMMU
[SPARC64]: Fix bogus flush instruction usage. Some of the trap code was still assuming that alternate global %g6 was hard coded with current_thread_info(). Let's just consistently flush at KERNBASE when we need a pipeline synchronization. That's locked into the TLB and will always work. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-01 02:33:00 +00:00
sethi %hi(KERNBASE), %o4
flush %o4
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
wrpr %g0, 0, %tl
retl
wrpr %g7, 0x0, %pstate
#ifdef DCACHE_ALIASING_POSSIBLE
[SPARC64]: Simplify Spitfire D-cache page flush. It tries to batch up the tag loads and comparisons, and then the stores. And this is just complicated instead of efficient. Also, make the symbol of the Cheetah version more grepable. Signed-off-by: David S. Miller <davem@davemloft.net>
2005-09-26 23:06:03 +00:00
__cheetah_flush_dcache_page: /* 11 insns */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
sethi %uhi(PAGE_OFFSET), %g1
sllx %g1, 32, %g1
sub %o0, %g1, %o0
sethi %hi(PAGE_SIZE), %o4
1: subcc %o4, (1 << 5), %o4
stxa %g0, [%o0 + %o4] ASI_DCACHE_INVALIDATE
membar #Sync
bne,pt %icc, 1b
nop
retl /* I-cache flush never needed on Cheetah, see callers. */
nop
#endif /* DCACHE_ALIASING_POSSIBLE */
cheetah_patch_one:
1: lduw [%o1], %g1
stw %g1, [%o0]
flush %o0
subcc %o2, 1, %o2
add %o1, 4, %o1
bne,pt %icc, 1b
add %o0, 4, %o0
retl
nop
.globl cheetah_patch_cachetlbops
cheetah_patch_cachetlbops:
save %sp, -128, %sp
sethi %hi(__flush_tlb_mm), %o0
or %o0, %lo(__flush_tlb_mm), %o0
sethi %hi(__cheetah_flush_tlb_mm), %o1
or %o1, %lo(__cheetah_flush_tlb_mm), %o1
call cheetah_patch_one
[SPARC64]: Fix bogus flush instruction usage. Some of the trap code was still assuming that alternate global %g6 was hard coded with current_thread_info(). Let's just consistently flush at KERNBASE when we need a pipeline synchronization. That's locked into the TLB and will always work. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-01 02:33:00 +00:00
mov 19, %o2
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
sethi %hi(__flush_tlb_pending), %o0
or %o0, %lo(__flush_tlb_pending), %o0
sethi %hi(__cheetah_flush_tlb_pending), %o1
or %o1, %lo(__cheetah_flush_tlb_pending), %o1
call cheetah_patch_one
[SPARC64]: Fix bogus flush instruction usage. Some of the trap code was still assuming that alternate global %g6 was hard coded with current_thread_info(). Let's just consistently flush at KERNBASE when we need a pipeline synchronization. That's locked into the TLB and will always work. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-01 02:33:00 +00:00
mov 27, %o2
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
#ifdef DCACHE_ALIASING_POSSIBLE
sethi %hi(__flush_dcache_page), %o0
or %o0, %lo(__flush_dcache_page), %o0
[SPARC64]: Simplify Spitfire D-cache page flush. It tries to batch up the tag loads and comparisons, and then the stores. And this is just complicated instead of efficient. Also, make the symbol of the Cheetah version more grepable. Signed-off-by: David S. Miller <davem@davemloft.net>
2005-09-26 23:06:03 +00:00
sethi %hi(__cheetah_flush_dcache_page), %o1
or %o1, %lo(__cheetah_flush_dcache_page), %o1
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
call cheetah_patch_one
mov 11, %o2
#endif /* DCACHE_ALIASING_POSSIBLE */
ret
restore
#ifdef CONFIG_SMP
/* These are all called by the slaves of a cross call, at
* trap level 1, with interrupts fully disabled.
*
* Register usage:
* %g5 mm->context (all tlb flushes)
* %g1 address arg 1 (tlb page and range flushes)
* %g7 address arg 2 (tlb range flush only)
*
[SPARC64]: Elminate all usage of hard-coded trap globals. UltraSPARC has special sets of global registers which are switched to for certain trap types. There is one set for MMU related traps, one set of Interrupt Vector processing, and another set (called the Alternate globals) for all other trap types. For what seems like forever we've hard coded the values in some of these trap registers. Some examples include: 1) Interrupt Vector global %g6 holds current processors interrupt work struct where received interrupts are managed for IRQ handler dispatch. 2) MMU global %g7 holds the base of the page tables of the currently active address space. 3) Alternate global %g6 held the current_thread_info() value. Such hardcoding has resulted in some serious issues in many areas. There are some code sequences where having another register available would help clean up the implementation. Taking traps such as cross-calls from the OBP firmware requires some trick code sequences wherein we have to save away and restore all of the special sets of global registers when we enter/exit OBP. We were also using the IMMU TSB register on SMP to hold the per-cpu area base address, which doesn't work any longer now that we actually use the TSB facility of the cpu. The implementation is pretty straight forward. One tricky bit is getting the current processor ID as that is different on different cpu variants. We use a stub with a fancy calling convention which we patch at boot time. The calling convention is that the stub is branched to and the (PC - 4) to return to is in register %g1. The cpu number is left in %g6. This stub can be invoked by using the __GET_CPUID macro. We use an array of per-cpu trap state to store the current thread and physical address of the current address space's page tables. The TRAP_LOAD_THREAD_REG loads %g6 with the current thread from this table, it uses __GET_CPUID and also clobbers %g1. TRAP_LOAD_IRQ_WORK is used by the interrupt vector processing to load the current processor's IRQ software state into %g6. It also uses __GET_CPUID and clobbers %g1. Finally, TRAP_LOAD_PGD_PHYS loads the physical address base of the current address space's page tables into %g7, it clobbers %g1 and uses __GET_CPUID. Many refinements are possible, as well as some tuning, with this stuff in place. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-27 07:24:22 +00:00
* %g6 scratch 1
* %g2 scratch 2
* %g3 scratch 3
* %g4 scratch 4
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
*/
.align 32
.globl xcall_flush_tlb_mm
xcall_flush_tlb_mm:
mov PRIMARY_CONTEXT, %g2
ldxa [%g2] ASI_DMMU, %g3
[SPARC64]: Preserve nucleus ctx page size during TLB flushes. Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-31 03:21:34 +00:00
srlx %g3, CTX_PGSZ1_NUC_SHIFT, %g4
sllx %g4, CTX_PGSZ1_NUC_SHIFT, %g4
or %g5, %g4, %g5 /* Preserve nucleus page size fields */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
stxa %g5, [%g2] ASI_DMMU
[SPARC64]: Preserve nucleus ctx page size during TLB flushes. Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-31 03:21:34 +00:00
mov 0x40, %g4
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
stxa %g0, [%g4] ASI_DMMU_DEMAP
stxa %g0, [%g4] ASI_IMMU_DEMAP
stxa %g3, [%g2] ASI_DMMU
retry
.globl xcall_flush_tlb_pending
xcall_flush_tlb_pending:
/* %g5=context, %g1=nr, %g7=vaddrs[] */
sllx %g1, 3, %g1
mov PRIMARY_CONTEXT, %g4
ldxa [%g4] ASI_DMMU, %g2
[SPARC64]: Preserve nucleus ctx page size during TLB flushes. Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-31 03:21:34 +00:00
srlx %g2, CTX_PGSZ1_NUC_SHIFT, %g4
sllx %g4, CTX_PGSZ1_NUC_SHIFT, %g4
or %g5, %g4, %g5
mov PRIMARY_CONTEXT, %g4
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
stxa %g5, [%g4] ASI_DMMU
1: sub %g1, (1 << 3), %g1
ldx [%g7 + %g1], %g5
andcc %g5, 0x1, %g0
be,pn %icc, 2f
andn %g5, 0x1, %g5
stxa %g0, [%g5] ASI_IMMU_DEMAP
2: stxa %g0, [%g5] ASI_DMMU_DEMAP
membar #Sync
brnz,pt %g1, 1b
nop
stxa %g2, [%g4] ASI_DMMU
retry
.globl xcall_flush_tlb_kernel_range
xcall_flush_tlb_kernel_range:
sethi %hi(PAGE_SIZE - 1), %g2
or %g2, %lo(PAGE_SIZE - 1), %g2
andn %g1, %g2, %g1
andn %g7, %g2, %g7
sub %g7, %g1, %g3
add %g2, 1, %g2
sub %g3, %g2, %g3
or %g1, 0x20, %g1 ! Nucleus
1: stxa %g0, [%g1 + %g3] ASI_DMMU_DEMAP
stxa %g0, [%g1 + %g3] ASI_IMMU_DEMAP
membar #Sync
brnz,pt %g3, 1b
sub %g3, %g2, %g3
retry
nop
nop
/* This runs in a very controlled environment, so we do
* not need to worry about BH races etc.
*/
.globl xcall_sync_tick
xcall_sync_tick:
rdpr %pstate, %g2
wrpr %g2, PSTATE_IG | PSTATE_AG, %pstate
rdpr %pil, %g2
wrpr %g0, 15, %pil
sethi %hi(109f), %g7
b,pt %xcc, etrap_irq
109: or %g7, %lo(109b), %g7
call smp_synchronize_tick_client
nop
clr %l6
b rtrap_xcall
ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %l1
/* NOTE: This is SPECIAL!! We do etrap/rtrap however
* we choose to deal with the "BH's run with
* %pil==15" problem (described in asm/pil.h)
* by just invoking rtrap directly past where
* BH's are checked for.
*
* We do it like this because we do not want %pil==15
* lockups to prevent regs being reported.
*/
.globl xcall_report_regs
xcall_report_regs:
rdpr %pstate, %g2
wrpr %g2, PSTATE_IG | PSTATE_AG, %pstate
rdpr %pil, %g2
wrpr %g0, 15, %pil
sethi %hi(109f), %g7
b,pt %xcc, etrap_irq
109: or %g7, %lo(109b), %g7
call __show_regs
add %sp, PTREGS_OFF, %o0
clr %l6
/* Has to be a non-v9 branch due to the large distance. */
b rtrap_xcall
ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %l1
#ifdef DCACHE_ALIASING_POSSIBLE
.align 32
.globl xcall_flush_dcache_page_cheetah
xcall_flush_dcache_page_cheetah: /* %g1 == physical page address */
sethi %hi(PAGE_SIZE), %g3
1: subcc %g3, (1 << 5), %g3
stxa %g0, [%g1 + %g3] ASI_DCACHE_INVALIDATE
membar #Sync
bne,pt %icc, 1b
nop
retry
nop
#endif /* DCACHE_ALIASING_POSSIBLE */
.globl xcall_flush_dcache_page_spitfire
xcall_flush_dcache_page_spitfire: /* %g1 == physical page address
%g7 == kernel page virtual address
%g5 == (page->mapping != NULL) */
#ifdef DCACHE_ALIASING_POSSIBLE
srlx %g1, (13 - 2), %g1 ! Form tag comparitor
sethi %hi(L1DCACHE_SIZE), %g3 ! D$ size == 16K
sub %g3, (1 << 5), %g3 ! D$ linesize == 32
1: ldxa [%g3] ASI_DCACHE_TAG, %g2
andcc %g2, 0x3, %g0
be,pn %xcc, 2f
andn %g2, 0x3, %g2
cmp %g2, %g1
bne,pt %xcc, 2f
nop
stxa %g0, [%g3] ASI_DCACHE_TAG
membar #Sync
2: cmp %g3, 0
bne,pt %xcc, 1b
sub %g3, (1 << 5), %g3
brz,pn %g5, 2f
#endif /* DCACHE_ALIASING_POSSIBLE */
sethi %hi(PAGE_SIZE), %g3
1: flush %g7
subcc %g3, (1 << 5), %g3
bne,pt %icc, 1b
add %g7, (1 << 5), %g7
2: retry
nop
nop
/* These just get rescheduled to PIL vectors. */
.globl xcall_call_function
xcall_call_function:
wr %g0, (1 << PIL_SMP_CALL_FUNC), %set_softint
retry
.globl xcall_receive_signal
xcall_receive_signal:
wr %g0, (1 << PIL_SMP_RECEIVE_SIGNAL), %set_softint
retry
.globl xcall_capture
xcall_capture:
wr %g0, (1 << PIL_SMP_CAPTURE), %set_softint
retry
#endif /* CONFIG_SMP */
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