mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-21 00:42:16 +00:00
b4d1b82578
Doing a "SUNW,stop-self" firmware call on the other cpus is not the correct thing to do when dropping into the firmware for a halt, reboot, or power-off. For now, just do nothing to quiet the other cpus, as the system should be quiescent enough. Later we may decide to implement smp_send_stop() like the other SMP platforms do. Based upon a report from Christopher Zimmermann. Signed-off-by: David S. Miller <davem@davemloft.net>
531 lines
12 KiB
ArmAsm
531 lines
12 KiB
ArmAsm
/* $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>
|
|
#include <asm/mmu.h>
|
|
#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
|
|
retl
|
|
flush %g6
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
|
|
.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
|
|
flush %g6
|
|
retl
|
|
wrpr %g7, 0x0, %pstate
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
|
|
.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
|
|
2: retl
|
|
flush %g6
|
|
|
|
__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
|
|
flush %g6
|
|
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
|
|
.section .kprobes.text, "ax"
|
|
.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
|
|
|
|
/* This routine is Spitfire specific so the hardcoded
|
|
* D-cache size and line-size are OK.
|
|
*/
|
|
.align 64
|
|
.globl __flush_dcache_page
|
|
__flush_dcache_page: /* %o0=kaddr, %o1=flush_icache */
|
|
sethi %uhi(PAGE_OFFSET), %g1
|
|
sllx %g1, 32, %g1
|
|
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
|
|
|
|
/* 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 */
|
|
|
|
.previous
|
|
|
|
/* Cheetah specific versions, patched at boot time. */
|
|
__cheetah_flush_tlb_mm: /* 18 insns */
|
|
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
|
|
srlx %g2, CTX_PGSZ1_NUC_SHIFT, %o1
|
|
sllx %o1, CTX_PGSZ1_NUC_SHIFT, %o1
|
|
or %o0, %o1, %o0 /* Preserve nucleus page size fields */
|
|
stxa %o0, [%o2] ASI_DMMU
|
|
stxa %g0, [%g3] ASI_DMMU_DEMAP
|
|
stxa %g0, [%g3] ASI_IMMU_DEMAP
|
|
stxa %g2, [%o2] ASI_DMMU
|
|
flush %g6
|
|
wrpr %g0, 0, %tl
|
|
retl
|
|
wrpr %g7, 0x0, %pstate
|
|
|
|
__cheetah_flush_tlb_pending: /* 26 insns */
|
|
/* %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
|
|
srlx %g2, CTX_PGSZ1_NUC_SHIFT, %o3
|
|
sllx %o3, CTX_PGSZ1_NUC_SHIFT, %o3
|
|
or %o0, %o3, %o0 /* Preserve nucleus page size fields */
|
|
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
|
|
membar #Sync
|
|
brnz,pt %o1, 1b
|
|
nop
|
|
stxa %g2, [%o4] ASI_DMMU
|
|
flush %g6
|
|
wrpr %g0, 0, %tl
|
|
retl
|
|
wrpr %g7, 0x0, %pstate
|
|
|
|
#ifdef DCACHE_ALIASING_POSSIBLE
|
|
__cheetah_flush_dcache_page: /* 11 insns */
|
|
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
|
|
mov 18, %o2
|
|
|
|
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
|
|
mov 26, %o2
|
|
|
|
#ifdef DCACHE_ALIASING_POSSIBLE
|
|
sethi %hi(__flush_dcache_page), %o0
|
|
or %o0, %lo(__flush_dcache_page), %o0
|
|
sethi %hi(__cheetah_flush_dcache_page), %o1
|
|
or %o1, %lo(__cheetah_flush_dcache_page), %o1
|
|
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)
|
|
*
|
|
* %g6 ivector table, don't touch
|
|
* %g2 scratch 1
|
|
* %g3 scratch 2
|
|
* %g4 scratch 3
|
|
*
|
|
* TODO: Make xcall TLB range flushes use the tricks above... -DaveM
|
|
*/
|
|
.align 32
|
|
.globl xcall_flush_tlb_mm
|
|
xcall_flush_tlb_mm:
|
|
mov PRIMARY_CONTEXT, %g2
|
|
ldxa [%g2] ASI_DMMU, %g3
|
|
srlx %g3, CTX_PGSZ1_NUC_SHIFT, %g4
|
|
sllx %g4, CTX_PGSZ1_NUC_SHIFT, %g4
|
|
or %g5, %g4, %g5 /* Preserve nucleus page size fields */
|
|
stxa %g5, [%g2] ASI_DMMU
|
|
mov 0x40, %g4
|
|
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
|
|
srlx %g2, CTX_PGSZ1_NUC_SHIFT, %g4
|
|
sllx %g4, CTX_PGSZ1_NUC_SHIFT, %g4
|
|
or %g5, %g4, %g5
|
|
mov PRIMARY_CONTEXT, %g4
|
|
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
|
|
|
|
.data
|
|
|
|
errata32_hwbug:
|
|
.xword 0
|
|
|
|
.text
|
|
|
|
/* These two are not performance critical... */
|
|
.globl xcall_flush_tlb_all_spitfire
|
|
xcall_flush_tlb_all_spitfire:
|
|
/* Spitfire Errata #32 workaround. */
|
|
sethi %hi(errata32_hwbug), %g4
|
|
stx %g0, [%g4 + %lo(errata32_hwbug)]
|
|
|
|
clr %g2
|
|
clr %g3
|
|
1: ldxa [%g3] ASI_DTLB_DATA_ACCESS, %g4
|
|
and %g4, _PAGE_L, %g5
|
|
brnz,pn %g5, 2f
|
|
mov TLB_TAG_ACCESS, %g7
|
|
|
|
stxa %g0, [%g7] ASI_DMMU
|
|
membar #Sync
|
|
stxa %g0, [%g3] ASI_DTLB_DATA_ACCESS
|
|
membar #Sync
|
|
|
|
/* Spitfire Errata #32 workaround. */
|
|
sethi %hi(errata32_hwbug), %g4
|
|
stx %g0, [%g4 + %lo(errata32_hwbug)]
|
|
|
|
2: ldxa [%g3] ASI_ITLB_DATA_ACCESS, %g4
|
|
and %g4, _PAGE_L, %g5
|
|
brnz,pn %g5, 2f
|
|
mov TLB_TAG_ACCESS, %g7
|
|
|
|
stxa %g0, [%g7] ASI_IMMU
|
|
membar #Sync
|
|
stxa %g0, [%g3] ASI_ITLB_DATA_ACCESS
|
|
membar #Sync
|
|
|
|
/* Spitfire Errata #32 workaround. */
|
|
sethi %hi(errata32_hwbug), %g4
|
|
stx %g0, [%g4 + %lo(errata32_hwbug)]
|
|
|
|
2: add %g2, 1, %g2
|
|
cmp %g2, SPITFIRE_HIGHEST_LOCKED_TLBENT
|
|
ble,pt %icc, 1b
|
|
sll %g2, 3, %g3
|
|
flush %g6
|
|
retry
|
|
|
|
.globl xcall_flush_tlb_all_cheetah
|
|
xcall_flush_tlb_all_cheetah:
|
|
mov 0x80, %g2
|
|
stxa %g0, [%g2] ASI_DMMU_DEMAP
|
|
stxa %g0, [%g2] ASI_IMMU_DEMAP
|
|
retry
|
|
|
|
/* 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 */
|