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