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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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45fec05f80
If we're just switching between different alternate global sets, nop it out on sun4v. Also, get rid of all of the alternate global save/restore in the OBP CIF trampoline code. Signed-off-by: David S. Miller <davem@davemloft.net>
49 lines
1000 B
ArmAsm
49 lines
1000 B
ArmAsm
/* 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, 2006 David S. Miller <davem@davemloft.net>
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*/
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#include <asm/pstate.h>
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#include <asm/cpudata.h>
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#include <asm/thread_info.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, -192, %sp
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ldx [%i0 + 0x008], %l2 ! prom_cif_handler
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mov %g4, %l0
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mov %g5, %l1
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mov %g6, %l3
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call %l2
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add %i0, 0x018, %o0 ! prom_args
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mov %l0, %g4
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mov %l1, %g5
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mov %l3, %g6
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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, -192, %sp
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TRAP_LOAD_THREAD_REG(%g6, %g1)
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LOAD_PER_CPU_BASE(%g5, %g6, %g4, %g3, %o0)
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ldx [%g6 + TI_TASK], %g4
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call prom_world
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mov 0, %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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mov 1, %o0
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ret
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restore %l1, 0, %o0
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