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/*
* Initial implementation:
* Copyright (c) 2001 Robert Drehmel
* All rights reserved.
*
* As long as the above copyright statement and this notice remain
* unchanged, you can do what ever you want with this file.
*
* $FreeBSD$
*/
#define LOCORE
#include <machine/asi.h>
#include <machine/asm.h>
#include <machine/pstate.h>
#include <machine/smp.h>
#include <machine/upa.h>
#define PAGE_SIZE 8192
#define PAGE_SHIFT 13
#define SPOFF 2047
#define STACK_SIZE (2 * PAGE_SIZE)
ENTRY(_start)
/* limit interrupts */
wrpr %g0, 13, %pil
/*
* PSTATE: privileged, interrupts enabled, floating point
* unit enabled
*/
wrpr %g0, PSTATE_PRIV|PSTATE_IE|PSTATE_PEF, %pstate
wr %g0, 0x4, %fprs
setx stack + STACK_SIZE - SPOFF - CCFSZ, %l7, %l6
mov %l6, %sp
call main
mov %o4, %o0
sir
/*
* %o0 input VA constant
* %o1 current iTLB offset
* %o2 current iTLB TTE tag
*/
ENTRY(itlb_va_to_pa)
clr %o1
0: ldxa [%o1] ASI_ITLB_TAG_READ_REG, %o2
cmp %o2, %o0
bne,a %xcc, 1f
nop
/* return PA of matching entry */
ldxa [%o1] ASI_ITLB_DATA_ACCESS_REG, %o0
sllx %o0, 23, %o0
srlx %o0, PAGE_SHIFT+23, %o0
sllx %o0, PAGE_SHIFT, %o0
retl
mov %o0, %o1
1: cmp %o1, 63<<3
blu %xcc, 0b
add %o1, 8, %o1
clr %o0
retl
not %o0
ENTRY(dtlb_va_to_pa)
clr %o1
0: ldxa [%o1] ASI_DTLB_TAG_READ_REG, %o2
cmp %o2, %o0
bne,a %xcc, 1f
nop
/* return PA of matching entry */
ldxa [%o1] ASI_DTLB_DATA_ACCESS_REG, %o0
sllx %o0, 23, %o0
srlx %o0, PAGE_SHIFT+23, %o0
sllx %o0, PAGE_SHIFT, %o0
retl
mov %o0, %o1
1: cmp %o1, 63<<3
blu %xcc, 0b
add %o1, 8, %o1
clr %o0
retl
not %o0
/*
* %o0 = vpn
* %o1 = tte data
*/
ENTRY(itlb_enter)
rdpr %pstate, %o4
wrpr %o4, PSTATE_IE, %pstate
mov AA_IMMU_TAR, %o3
stxa %o0, [%o3] ASI_IMMU
stxa %o1, [%g0] ASI_ITLB_DATA_IN_REG
membar #Sync
retl
wrpr %o4, 0, %pstate
ENTRY(dtlb_enter)
rdpr %pstate, %o4
wrpr %o4, PSTATE_IE, %pstate
mov AA_DMMU_TAR, %o3
stxa %o0, [%o3] ASI_DMMU
stxa %o1, [%g0] ASI_DTLB_DATA_IN_REG
membar #Sync
retl
wrpr %o4, 0, %pstate
.comm stack, STACK_SIZE, 32
.comm smp_stack, STACK_SIZE, 32
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