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/* $Id: trampoline.S,v 1.6 1998/10/11 06:58:23 davem Exp $
* trampoline.S: Jump start slave processors on sparc64.
*
* Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
*/
#include <asm/head.h>
#include <asm/asi.h>
#include <asm/lsu.h>
#include <asm/pstate.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/spitfire.h>
#include <asm/asm_offsets.h>
.data
.align 8
.globl smp_trampoline
smp_trampoline: .skip 0x300
.text
.align 8
.globl sparc64_cpu_startup, sparc64_cpu_startup_end
sparc64_cpu_startup:
flushw
mov (LSU_CONTROL_IC | LSU_CONTROL_DC | LSU_CONTROL_IM | LSU_CONTROL_DM), %g1
stxa %g1, [%g0] ASI_LSU_CONTROL
membar #Sync
wrpr %g0, (PSTATE_PRIV | PSTATE_PEF | PSTATE_IE), %pstate
wr %g0, 0, %fprs
wrpr %g0, 15, %pil
sethi %uhi(PAGE_OFFSET), %g4
sllx %g4, 32, %g4
/* XXX Buggy PROM... */
srl %o0, 0, %g6
add %g6, %g4, %g6
sethi %uhi(_PAGE_VALID | _PAGE_SZ4MB), %g5
sllx %g5, 32, %g5
or %g5, (_PAGE_CP | _PAGE_CV | _PAGE_P | _PAGE_L | _PAGE_W | _PAGE_G), %g5
sethi %uhi(_PAGE_PADDR), %g3
or %g3, %ulo(_PAGE_PADDR), %g3
sllx %g3, 32, %g3
sethi %hi(_PAGE_PADDR), %g7
or %g7, %lo(_PAGE_PADDR), %g7
or %g3, %g7, %g3
clr %l0
set 0x1fff, %l2
rd %pc, %l3
andn %l3, %l2, %g2
1: ldxa [%l0] ASI_ITLB_TAG_READ, %g1
nop
nop
nop
andn %g1, %l2, %g1
cmp %g1, %g2
be,a,pn %xcc, 2f
ldxa [%l0] ASI_ITLB_DATA_ACCESS, %g1
cmp %l0, (63 << 3)
blu,pt %xcc, 1b
add %l0, (1 << 3), %l0
2: nop
nop
nop
and %g1, %g3, %g1
sub %g1, %g2, %g1
or %g5, %g1, %g5
clr %l0
sethi %hi(KERNBASE), %g3
sethi %hi(KERNBASE<<1), %g7
mov TLB_TAG_ACCESS, %l7
1: ldxa [%l0] ASI_ITLB_TAG_READ, %g1
nop
nop
nop
andn %g1, %l2, %g1
cmp %g1, %g3
blu,pn %xcc, 2f
cmp %g1, %g7
bgeu,pn %xcc, 2f
nop
stxa %g0, [%l7] ASI_IMMU
stxa %g0, [%l0] ASI_ITLB_DATA_ACCESS
2: cmp %l0, (63 << 3)
blu,pt %xcc, 1b
add %l0, (1 << 3), %l0
nop
nop
nop
clr %l0
1: ldxa [%l0] ASI_DTLB_TAG_READ, %g1
nop
nop
nop
andn %g1, %l2, %g1
cmp %g1, %g3
blu,pn %xcc, 2f
cmp %g1, %g7
bgeu,pn %xcc, 2f
nop
stxa %g0, [%l7] ASI_DMMU
stxa %g0, [%l0] ASI_DTLB_DATA_ACCESS
2: cmp %l0, (63 << 3)
blu,pt %xcc, 1b
add %l0, (1 << 3), %l0
nop
nop
nop
sethi %hi(KERNBASE), %g3
mov (63 << 3), %g7
stxa %g3, [%l7] ASI_DMMU
stxa %g5, [%g7] ASI_DTLB_DATA_ACCESS
membar #Sync
stxa %g3, [%l7] ASI_IMMU
stxa %g5, [%g7] ASI_ITLB_DATA_ACCESS
membar #Sync
flush %g3
membar #Sync
b,pt %xcc, 1f
nop
1: set bounce, %g2
jmpl %g2 + %g0, %g0
nop
bounce:
mov PRIMARY_CONTEXT, %g7
stxa %g0, [%g7] ASI_DMMU
membar #Sync
mov SECONDARY_CONTEXT, %g7
stxa %g0, [%g7] ASI_DMMU
membar #Sync
mov TLB_TAG_ACCESS, %g2
stxa %g3, [%g2] ASI_IMMU
stxa %g3, [%g2] ASI_DMMU
mov (63 << 3), %g7
ldxa [%g7] ASI_ITLB_DATA_ACCESS, %g1
andn %g1, (_PAGE_G), %g1
stxa %g1, [%g7] ASI_ITLB_DATA_ACCESS
membar #Sync
ldxa [%g7] ASI_DTLB_DATA_ACCESS, %g1
andn %g1, (_PAGE_G), %g1
stxa %g1, [%g7] ASI_DTLB_DATA_ACCESS
membar #Sync
flush %g3
membar #Sync
mov 1, %g5
sllx %g5, (PAGE_SHIFT + 1), %g5
sub %g5, (REGWIN_SZ + STACK_BIAS), %g5
add %g6, %g5, %sp
mov 0, %fp
wrpr %g0, 0, %wstate
wrpr %g0, 0, %tl
/* Setup the trap globals, then we can resurface. */
rdpr %pstate, %o1
mov %g6, %o2
wrpr %o1, (PSTATE_AG | PSTATE_IE), %pstate
sethi %hi(sparc64_ttable_tl0), %g5
wrpr %g5, %tba
mov %o2, %g6
wrpr %o1, (PSTATE_MG | PSTATE_IE), %pstate
#define KERN_HIGHBITS ((_PAGE_VALID | _PAGE_SZ4MB) ^ 0xfffff80000000000)
#define KERN_LOWBITS (_PAGE_CP | _PAGE_CV | _PAGE_P | _PAGE_W)
#ifdef THIS_IS_CHEETAH
#error Dave, make sure you took care of other issues in rest of sparc64 code...
#define VPTE_BASE 0xffe0000000000000
#else /* Spitfire/Blackbird */
#define VPTE_BASE 0xfffffffe00000000
#endif
mov TSB_REG, %g1
stxa %g0, [%g1] ASI_DMMU
membar #Sync
mov TLB_SFSR, %g1
sethi %uhi(KERN_HIGHBITS), %g2
or %g2, %ulo(KERN_HIGHBITS), %g2
sllx %g2, 32, %g2
or %g2, KERN_LOWBITS, %g2
sethi %uhi(VPTE_BASE), %g3
or %g3, %ulo(VPTE_BASE), %g3
sllx %g3, 32, %g3
clr %g7
#undef KERN_HIGHBITS
#undef KERN_LOWBITS
#undef VPTE_BASE
wrpr %o1, (PSTATE_IG | PSTATE_IE), %pstate
sethi %hi(ivector_to_mask), %g5
or %g5, %lo(ivector_to_mask), %g1
mov 0x40, %g2
wrpr %g0, 0, %wstate
or %o1, PSTATE_IE, %o1
wrpr %o1, 0, %pstate
call smp_callin
nop
call cpu_idle
mov 0, %o0
call cpu_panic
nop
1: b,a,pt %xcc, 1b
.align 8
sparc64_cpu_startup_end:
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