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/* cif.S: PROM entry/exit assembler trampolines.
*
* Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
* Copyright (C) 2005 David S. Miller <davem@davemloft.net>
*/
#include <asm/pstate.h>
.text
.globl prom_cif_interface
prom_cif_interface:
sethi %hi(p1275buf), %o0
or %o0, %lo(p1275buf), %o0
ldx [%o0 + 0x010], %o1 ! prom_cif_stack
save %o1, -0x190, %sp
ldx [%i0 + 0x008], %l2 ! prom_cif_handler
rdpr %pstate, %l4
wrpr %g0, 0x15, %pstate ! save alternate globals
stx %g1, [%sp + 2047 + 0x0b0]
stx %g2, [%sp + 2047 + 0x0b8]
stx %g3, [%sp + 2047 + 0x0c0]
stx %g4, [%sp + 2047 + 0x0c8]
stx %g5, [%sp + 2047 + 0x0d0]
stx %g6, [%sp + 2047 + 0x0d8]
stx %g7, [%sp + 2047 + 0x0e0]
wrpr %g0, 0x814, %pstate ! save interrupt globals
stx %g1, [%sp + 2047 + 0x0e8]
stx %g2, [%sp + 2047 + 0x0f0]
stx %g3, [%sp + 2047 + 0x0f8]
stx %g4, [%sp + 2047 + 0x100]
stx %g5, [%sp + 2047 + 0x108]
stx %g6, [%sp + 2047 + 0x110]
stx %g7, [%sp + 2047 + 0x118]
wrpr %g0, 0x14, %pstate ! save normal globals
stx %g1, [%sp + 2047 + 0x120]
stx %g2, [%sp + 2047 + 0x128]
stx %g3, [%sp + 2047 + 0x130]
stx %g4, [%sp + 2047 + 0x138]
stx %g5, [%sp + 2047 + 0x140]
stx %g6, [%sp + 2047 + 0x148]
stx %g7, [%sp + 2047 + 0x150]
wrpr %g0, 0x414, %pstate ! save mmu globals
stx %g1, [%sp + 2047 + 0x158]
stx %g2, [%sp + 2047 + 0x160]
stx %g3, [%sp + 2047 + 0x168]
stx %g4, [%sp + 2047 + 0x170]
stx %g5, [%sp + 2047 + 0x178]
stx %g6, [%sp + 2047 + 0x180]
stx %g7, [%sp + 2047 + 0x188]
mov %g1, %l0 ! also save to locals, so we can handle
mov %g2, %l1 ! tlb faults later on, when accessing
mov %g3, %l3 ! the stack.
mov %g7, %l5
wrpr %l4, PSTATE_IE, %pstate ! turn off interrupts
call %l2
add %i0, 0x018, %o0 ! prom_args
wrpr %g0, 0x414, %pstate ! restore mmu globals
mov %l0, %g1
mov %l1, %g2
mov %l3, %g3
mov %l5, %g7
wrpr %g0, 0x14, %pstate ! restore normal globals
ldx [%sp + 2047 + 0x120], %g1
ldx [%sp + 2047 + 0x128], %g2
ldx [%sp + 2047 + 0x130], %g3
ldx [%sp + 2047 + 0x138], %g4
ldx [%sp + 2047 + 0x140], %g5
ldx [%sp + 2047 + 0x148], %g6
ldx [%sp + 2047 + 0x150], %g7
wrpr %g0, 0x814, %pstate ! restore interrupt globals
ldx [%sp + 2047 + 0x0e8], %g1
ldx [%sp + 2047 + 0x0f0], %g2
ldx [%sp + 2047 + 0x0f8], %g3
ldx [%sp + 2047 + 0x100], %g4
ldx [%sp + 2047 + 0x108], %g5
ldx [%sp + 2047 + 0x110], %g6
ldx [%sp + 2047 + 0x118], %g7
wrpr %g0, 0x15, %pstate ! restore alternate globals
ldx [%sp + 2047 + 0x0b0], %g1
ldx [%sp + 2047 + 0x0b8], %g2
ldx [%sp + 2047 + 0x0c0], %g3
ldx [%sp + 2047 + 0x0c8], %g4
ldx [%sp + 2047 + 0x0d0], %g5
ldx [%sp + 2047 + 0x0d8], %g6
ldx [%sp + 2047 + 0x0e0], %g7
wrpr %l4, 0, %pstate ! restore original pstate
ret
restore
.globl prom_cif_callback
prom_cif_callback:
sethi %hi(p1275buf), %o1
or %o1, %lo(p1275buf), %o1
save %sp, -0x270, %sp
rdpr %pstate, %l4
wrpr %g0, 0x15, %pstate ! save PROM alternate globals
stx %g1, [%sp + 2047 + 0x0b0]
stx %g2, [%sp + 2047 + 0x0b8]
stx %g3, [%sp + 2047 + 0x0c0]
stx %g4, [%sp + 2047 + 0x0c8]
stx %g5, [%sp + 2047 + 0x0d0]
stx %g6, [%sp + 2047 + 0x0d8]
stx %g7, [%sp + 2047 + 0x0e0]
! restore Linux alternate globals
ldx [%sp + 2047 + 0x190], %g1
ldx [%sp + 2047 + 0x198], %g2
ldx [%sp + 2047 + 0x1a0], %g3
ldx [%sp + 2047 + 0x1a8], %g4
ldx [%sp + 2047 + 0x1b0], %g5
ldx [%sp + 2047 + 0x1b8], %g6
ldx [%sp + 2047 + 0x1c0], %g7
wrpr %g0, 0x814, %pstate ! save PROM interrupt globals
stx %g1, [%sp + 2047 + 0x0e8]
stx %g2, [%sp + 2047 + 0x0f0]
stx %g3, [%sp + 2047 + 0x0f8]
stx %g4, [%sp + 2047 + 0x100]
stx %g5, [%sp + 2047 + 0x108]
stx %g6, [%sp + 2047 + 0x110]
stx %g7, [%sp + 2047 + 0x118]
! restore Linux interrupt globals
ldx [%sp + 2047 + 0x1c8], %g1
ldx [%sp + 2047 + 0x1d0], %g2
ldx [%sp + 2047 + 0x1d8], %g3
ldx [%sp + 2047 + 0x1e0], %g4
ldx [%sp + 2047 + 0x1e8], %g5
ldx [%sp + 2047 + 0x1f0], %g6
ldx [%sp + 2047 + 0x1f8], %g7
wrpr %g0, 0x14, %pstate ! save PROM normal globals
stx %g1, [%sp + 2047 + 0x120]
stx %g2, [%sp + 2047 + 0x128]
stx %g3, [%sp + 2047 + 0x130]
stx %g4, [%sp + 2047 + 0x138]
stx %g5, [%sp + 2047 + 0x140]
stx %g6, [%sp + 2047 + 0x148]
stx %g7, [%sp + 2047 + 0x150]
! restore Linux normal globals
ldx [%sp + 2047 + 0x200], %g1
ldx [%sp + 2047 + 0x208], %g2
ldx [%sp + 2047 + 0x210], %g3
ldx [%sp + 2047 + 0x218], %g4
ldx [%sp + 2047 + 0x220], %g5
ldx [%sp + 2047 + 0x228], %g6
ldx [%sp + 2047 + 0x230], %g7
wrpr %g0, 0x414, %pstate ! save PROM mmu globals
stx %g1, [%sp + 2047 + 0x158]
stx %g2, [%sp + 2047 + 0x160]
stx %g3, [%sp + 2047 + 0x168]
stx %g4, [%sp + 2047 + 0x170]
stx %g5, [%sp + 2047 + 0x178]
stx %g6, [%sp + 2047 + 0x180]
stx %g7, [%sp + 2047 + 0x188]
! restore Linux mmu globals
ldx [%sp + 2047 + 0x238], %o0
ldx [%sp + 2047 + 0x240], %o1
ldx [%sp + 2047 + 0x248], %l2
ldx [%sp + 2047 + 0x250], %l3
ldx [%sp + 2047 + 0x258], %l5
ldx [%sp + 2047 + 0x260], %l6
ldx [%sp + 2047 + 0x268], %l7
! switch to Linux tba
sethi %hi(sparc64_ttable_tl0), %l1
rdpr %tba, %l0 ! save PROM tba
mov %o0, %g1
mov %o1, %g2
mov %l2, %g3
mov %l3, %g4
mov %l5, %g5
mov %l6, %g6
mov %l7, %g7
wrpr %l1, %tba ! install Linux tba
wrpr %l4, 0, %pstate ! restore PSTATE
call prom_world
mov %g0, %o0
ldx [%i1 + 0x000], %l2
call %l2
mov %i0, %o0
mov %o0, %l1
call prom_world
or %g0, 1, %o0
wrpr %g0, 0x14, %pstate ! interrupts off
! restore PROM mmu globals
ldx [%sp + 2047 + 0x158], %o0
ldx [%sp + 2047 + 0x160], %o1
ldx [%sp + 2047 + 0x168], %l2
ldx [%sp + 2047 + 0x170], %l3
ldx [%sp + 2047 + 0x178], %l5
ldx [%sp + 2047 + 0x180], %l6
ldx [%sp + 2047 + 0x188], %l7
wrpr %g0, 0x414, %pstate ! restore PROM mmu globals
mov %o0, %g1
mov %o1, %g2
mov %l2, %g3
mov %l3, %g4
mov %l5, %g5
mov %l6, %g6
mov %l7, %g7
wrpr %l0, %tba ! restore PROM tba
wrpr %g0, 0x14, %pstate ! restore PROM normal globals
ldx [%sp + 2047 + 0x120], %g1
ldx [%sp + 2047 + 0x128], %g2
ldx [%sp + 2047 + 0x130], %g3
ldx [%sp + 2047 + 0x138], %g4
ldx [%sp + 2047 + 0x140], %g5
ldx [%sp + 2047 + 0x148], %g6
ldx [%sp + 2047 + 0x150], %g7
wrpr %g0, 0x814, %pstate ! restore PROM interrupt globals
ldx [%sp + 2047 + 0x0e8], %g1
ldx [%sp + 2047 + 0x0f0], %g2
ldx [%sp + 2047 + 0x0f8], %g3
ldx [%sp + 2047 + 0x100], %g4
ldx [%sp + 2047 + 0x108], %g5
ldx [%sp + 2047 + 0x110], %g6
ldx [%sp + 2047 + 0x118], %g7
wrpr %g0, 0x15, %pstate ! restore PROM alternate globals
ldx [%sp + 2047 + 0x0b0], %g1
ldx [%sp + 2047 + 0x0b8], %g2
ldx [%sp + 2047 + 0x0c0], %g3
ldx [%sp + 2047 + 0x0c8], %g4
ldx [%sp + 2047 + 0x0d0], %g5
ldx [%sp + 2047 + 0x0d8], %g6
ldx [%sp + 2047 + 0x0e0], %g7
wrpr %l4, 0, %pstate
ret
restore %l1, 0, %o0
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