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/*-
* Copyright (c) 2002 Jake Burkholder.
* Copyright (c) 2008 Marius Strobl <marius@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <machine/asm.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/sparc64/sparc64/mp_locore.S 222828 2011-06-07 17:33:39Z marius $");
#include <machine/asi.h>
#include <machine/asmacros.h>
#include <machine/intr_machdep.h>
#include <machine/ktr.h>
#include <machine/pstate.h>
#include <machine/smp.h>
#include <machine/ver.h>
#include "assym.s"
.register %g2, #ignore
.register %g3, #ignore
.text
_ALIGN_TEXT
/*
* Initialize misc. state to known values: interrupts disabled, normal
* globals, windows flushed (cr = 0, cs = nwindows - 1), PIL_TICK and
* floating point disabled.
* Note that some firmware versions don't implement a clean window
* trap handler so we unfortunately can't clear the windows by setting
* %cleanwin to zero here.
*/
1: wrpr %g0, PSTATE_NORMAL, %pstate
wrpr %g0, PIL_TICK, %pil
wr %g0, 0, %fprs
rdpr %ver, %l7
srlx %l7, VER_IMPL_SHIFT, %l7
sll %l7, VER_IMPL_SIZE, %l7
srl %l7, VER_IMPL_SIZE, %l7
cmp %l7, CPU_IMPL_ULTRASPARCIIIp
bne %icc, 3f
nop
/*
* Relocate the locked entry in it16 slot 0 (if existent)
* as part of working around Cheetah+ erratum 34.
*/
setx TD_V | TD_L, %l1, %l0
/*
* We read ASI_ITLB_DATA_ACCESS_REG twice in order to work
* around errata of USIII and beyond.
*/
ldxa [%g0] ASI_ITLB_DATA_ACCESS_REG, %g0
ldxa [%g0] ASI_ITLB_DATA_ACCESS_REG, %l6
and %l6, %l0, %l1
cmp %l0, %l1
bne %xcc, 3f
nop
/* Flush the mapping of slot 0. */
ldxa [%g0] ASI_ITLB_TAG_READ_REG, %l5
srlx %l5, TAR_VPN_SHIFT, %l0
sllx %l0, TAR_VPN_SHIFT, %l0
or %l0, TLB_DEMAP_PRIMARY | TLB_DEMAP_PAGE, %l0
stxa %g0, [%l0] ASI_IMMU_DEMAP
/* The USIII-family ignores the address. */
flush %g0
/*
* Search a replacement slot != 0 and enter the data and tag
* that formerly were in slot 0.
*/
mov (1 << TLB_DAR_SLOT_SHIFT), %l4
setx TD_V, %l1, %l0
/*
* We read ASI_ITLB_DATA_ACCESS_REG twice in order to work
* around errata of USIII and beyond.
*/
2: ldxa [%l4] ASI_ITLB_DATA_ACCESS_REG, %g0
ldxa [%l4] ASI_ITLB_DATA_ACCESS_REG, %l1
and %l1, %l0, %l1
cmp %l0, %l1
be,a %xcc, 2b
add %l4, (1 << TLB_DAR_SLOT_SHIFT), %l4
wr %g0, ASI_IMMU, %asi
stxa %l5, [%g0 + AA_IMMU_TAR] %asi
stxa %l6, [%l4] ASI_ITLB_DATA_ACCESS_REG
/* The USIII-family ignores the address. */
flush %g0
3: rd %pc, %l6
ldx [%l6 + (9f-3b)], %l1
add %l6, (11f-3b), %l2
clr %l3
4: cmp %l3, %l1
be %xcc, 8f
nop
ldx [%l2 + TTE_VPN], %l4
ldx [%l2 + TTE_DATA], %l5
srlx %l4, TV_SIZE_BITS, %l4
sllx %l4, PAGE_SHIFT_4M, %l4
wr %g0, ASI_DMMU, %asi
stxa %l4, [%g0 + AA_DMMU_TAR] %asi
stxa %l5, [%g0] ASI_DTLB_DATA_IN_REG
membar #Sync
cmp %l7, CPU_IMPL_ULTRASPARCIIIp
bne %icc, 6f
wr %g0, ASI_IMMU, %asi
/*
* Search an unused slot != 0 and explicitly enter the data
* and tag there in order to avoid Cheetah+ erratum 34.
*/
mov (1 << TLB_DAR_SLOT_SHIFT), %l0
setx TD_V, %o1, %o0
/*
* We read ASI_ITLB_DATA_ACCESS_REG twice in order to work
* around errata of USIII and beyond.
*/
5: ldxa [%l0] ASI_ITLB_DATA_ACCESS_REG, %g0
ldxa [%l0] ASI_ITLB_DATA_ACCESS_REG, %o1
and %o1, %o0, %o1
cmp %o0, %o1
be,a %xcc, 5b
add %l0, (1 << TLB_DAR_SLOT_SHIFT), %l0
sethi %hi(KERNBASE), %o0
stxa %l4, [%g0 + AA_IMMU_TAR] %asi
stxa %l5, [%l0] ASI_ITLB_DATA_ACCESS_REG
flush %o0
ba %xcc, 7f
nop
6: sethi %hi(KERNBASE), %l0
stxa %l4, [%g0 + AA_IMMU_TAR] %asi
stxa %l5, [%g0] ASI_ITLB_DATA_IN_REG
flush %l0
7: add %l2, 1 << TTE_SHIFT, %l2
add %l3, 1, %l3
ba %xcc, 4b
nop
8: ldx [%l6 + (10f-3b)], %l1
jmpl %l1, %g0
nop
_ALIGN_DATA
9: .xword 0x0
10: .xword 0x0
11:
DATA(mp_tramp_code)
.xword 1b
DATA(mp_tramp_code_len)
.xword 11b-1b
DATA(mp_tramp_tlb_slots)
.xword 9b-1b
DATA(mp_tramp_func)
.xword 10b-1b
/*
* void mp_startup(void)
*/
ENTRY(mp_startup)
SET(cpu_start_args, %l1, %l0)
mov CPU_TICKSYNC, %l1
membar #StoreLoad
stw %l1, [%l0 + CSA_STATE]
1: ldx [%l0 + CSA_TICK], %l1
brz %l1, 1b
nop
wrpr %l1, 0, %tick
rdpr %ver, %l1
stx %l1, [%l0 + CSA_VER]
srlx %l1, VER_IMPL_SHIFT, %l1
sll %l1, VER_IMPL_SIZE, %l1
srl %l1, VER_IMPL_SIZE, %l1
cmp %l1, CPU_IMPL_SPARC64V
bl %icc, 4f
nop
cmp %l1, CPU_IMPL_ULTRASPARCI
bl %icc, 2f
nop
cmp %l1, CPU_IMPL_ULTRASPARCIII
bl %icc, 4f
nop
2: mov CPU_STICKSYNC, %l2
membar #StoreLoad
stw %l2, [%l0 + CSA_STATE]
3: ldx [%l0 + CSA_STICK], %l2
brz %l2, 3b
nop
wr %l2, 0, %asr24
4: call cpu_get_mid
mov %l1, %o0
/*
* Inform the boot processor we have inited.
*/
mov CPU_INIT, %l1
membar #LoadStore
stw %l1, [%l0 + CSA_STATE]
/*
* Wait till its our turn to bootstrap.
*/
5: lduw [%l0 + CSA_MID], %l1
cmp %l1, %o0
bne %xcc, 5b
nop
add %l0, CSA_TTES, %l1
clr %l2
/*
* Map the per-CPU pages.
*/
6: sllx %l2, TTE_SHIFT, %l3
add %l1, %l3, %l3
ldx [%l3 + TTE_VPN], %l4
ldx [%l3 + TTE_DATA], %l5
wr %g0, ASI_DMMU, %asi
srlx %l4, TV_SIZE_BITS, %l4
sllx %l4, PAGE_SHIFT_8K, %l4
stxa %l4, [%g0 + AA_DMMU_TAR] %asi
stxa %l5, [%g0] ASI_DTLB_DATA_IN_REG
membar #Sync
add %l2, 1, %l2
cmp %l2, PCPU_PAGES
bne %xcc, 6b
nop
/*
* Get onto our per-CPU panic stack, which precedes the struct pcpu
* in the per-CPU page.
*/
ldx [%l0 + CSA_PCPU], %l1
set PCPU_PAGES * PAGE_SIZE - PC_SIZEOF, %l2
add %l1, %l2, %l1
sub %l1, SPOFF + CCFSZ, %sp
/* Initialize global registers. */
call cpu_setregs
mov %l1, %o0
#if KTR_COMPILE & KTR_SMP
CATR(KTR_SMP,
"mp_startup: bootstrap cpuid=%d mid=%d pcpu=%#lx data=%#lx sp=%#lx"
, %g1, %g2, %g3, 7, 8, 9)
lduw [PCPU(CPUID)], %g2
stx %g2, [%g1 + KTR_PARM1]
lduw [PCPU(MID)], %g2
stx %g2, [%g1 + KTR_PARM2]
stx %l1, [%g1 + KTR_PARM3]
stx %sp, [%g1 + KTR_PARM5]
9:
#endif
/*
* And away we go. This doesn't return.
*/
call cpu_mp_bootstrap
mov %l1, %o0
sir
! NOTREACHED
END(mp_startup)