6eda3a7592
entry.S was a hodge-podge of several totally unrelated sets of assembler routines, ranging from FPU trap handlers to hypervisor call functions. Split it up into topic-sized pieces. Signed-off-by: David S. Miller <davem@davemloft.net>
51 lines
1.1 KiB
ArmAsm
51 lines
1.1 KiB
ArmAsm
/* The registers for cross calls will be:
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*
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* DATA 0: [low 32-bits] Address of function to call, jmp to this
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* [high 32-bits] MMU Context Argument 0, place in %g5
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* DATA 1: Address Argument 1, place in %g1
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* DATA 2: Address Argument 2, place in %g7
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*
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* With this method we can do most of the cross-call tlb/cache
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* flushing very quickly.
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*/
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.align 32
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.globl do_ivec
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.type do_ivec,#function
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do_ivec:
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mov 0x40, %g3
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ldxa [%g3 + %g0] ASI_INTR_R, %g3
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sethi %hi(KERNBASE), %g4
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cmp %g3, %g4
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bgeu,pn %xcc, do_ivec_xcall
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srlx %g3, 32, %g5
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stxa %g0, [%g0] ASI_INTR_RECEIVE
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membar #Sync
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sethi %hi(ivector_table_pa), %g2
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ldx [%g2 + %lo(ivector_table_pa)], %g2
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sllx %g3, 4, %g3
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add %g2, %g3, %g3
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TRAP_LOAD_IRQ_WORK_PA(%g6, %g1)
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ldx [%g6], %g5
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stxa %g5, [%g3] ASI_PHYS_USE_EC
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stx %g3, [%g6]
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wr %g0, 1 << PIL_DEVICE_IRQ, %set_softint
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retry
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do_ivec_xcall:
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mov 0x50, %g1
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ldxa [%g1 + %g0] ASI_INTR_R, %g1
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srl %g3, 0, %g3
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mov 0x60, %g7
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ldxa [%g7 + %g0] ASI_INTR_R, %g7
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stxa %g0, [%g0] ASI_INTR_RECEIVE
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membar #Sync
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ba,pt %xcc, 1f
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nop
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.align 32
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1: jmpl %g3, %g0
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nop
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.size do_ivec,.-do_ivec
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