110 lines
2.3 KiB
C++
110 lines
2.3 KiB
C++
/*
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* \brief Interface between kernel and userland
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* \author Sebastian Sumpf
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* \date 2015-06-02
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*/
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/*
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* Copyright (C) 2015-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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/* Genode includes */
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#include <kernel/interface.h>
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using namespace Kernel;
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/************************************
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** Helper macros for kernel calls **
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************************************/
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#define CALL_1_FILL_ARG_REGS \
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register Call_arg arg_0_reg asm("a0") = arg_0;
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#define CALL_2_FILL_ARG_REGS \
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CALL_1_FILL_ARG_REGS \
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register Call_arg arg_1_reg asm("a1") = arg_1;
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#define CALL_3_FILL_ARG_REGS \
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CALL_2_FILL_ARG_REGS \
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register Call_arg arg_2_reg asm("a2") = arg_2;
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#define CALL_4_FILL_ARG_REGS \
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CALL_3_FILL_ARG_REGS \
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register Call_arg arg_3_reg asm("a3") = arg_3;
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#define CALL_5_FILL_ARG_REGS \
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CALL_4_FILL_ARG_REGS \
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register Call_arg arg_4_reg asm("a4") = arg_4;
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#define CALL_1_SWI "ecall\n" : "+r" (arg_0_reg)
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#define CALL_2_SWI CALL_1_SWI: "r" (arg_1_reg)
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#define CALL_3_SWI CALL_2_SWI, "r" (arg_2_reg)
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#define CALL_4_SWI CALL_3_SWI, "r" (arg_3_reg)
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#define CALL_5_SWI CALL_4_SWI, "r" (arg_4_reg)
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/******************
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** Kernel calls **
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******************/
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Call_ret Kernel::call64(Call_arg arg_0)
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{
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CALL_1_FILL_ARG_REGS
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asm volatile(CALL_1_SWI);
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return arg_0_reg;
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}
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Call_ret Kernel::call(Call_arg arg_0)
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{
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CALL_1_FILL_ARG_REGS
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asm volatile(CALL_1_SWI);
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return arg_0_reg;
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}
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Call_ret Kernel::call(Call_arg arg_0,
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Call_arg arg_1)
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{
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CALL_2_FILL_ARG_REGS
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asm volatile(CALL_2_SWI);
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return arg_0_reg;
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}
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Call_ret Kernel::call(Call_arg arg_0,
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Call_arg arg_1,
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Call_arg arg_2)
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{
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CALL_3_FILL_ARG_REGS
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asm volatile(CALL_3_SWI);
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return arg_0_reg;
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}
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Call_ret Kernel::call(Call_arg arg_0,
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Call_arg arg_1,
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Call_arg arg_2,
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Call_arg arg_3)
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{
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CALL_4_FILL_ARG_REGS
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asm volatile(CALL_4_SWI);
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return arg_0_reg;
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}
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Call_ret Kernel::call(Call_arg arg_0,
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Call_arg arg_1,
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Call_arg arg_2,
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Call_arg arg_3,
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Call_arg arg_4)
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{
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CALL_5_FILL_ARG_REGS
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asm volatile(CALL_5_SWI);
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return arg_0_reg;
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}
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