126 lines
2.7 KiB
C++
126 lines
2.7 KiB
C++
/*
|
|
* \brief Interface between kernel and userland
|
|
* \author Stefan Kalkowski
|
|
* \date 2019-05-09
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2019 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU Affero General Public License version 3.
|
|
*/
|
|
|
|
/* Genode includes */
|
|
#include <kernel/interface.h>
|
|
|
|
using namespace Kernel;
|
|
|
|
|
|
/************************************
|
|
** Helper macros for kernel calls **
|
|
************************************/
|
|
|
|
#define CALL_1_FILL_ARG_REGS \
|
|
register Call_arg arg_0_reg asm("x0") = arg_0;
|
|
|
|
#define CALL_2_FILL_ARG_REGS \
|
|
CALL_1_FILL_ARG_REGS \
|
|
register Call_arg arg_1_reg asm("x1") = arg_1;
|
|
|
|
#define CALL_3_FILL_ARG_REGS \
|
|
CALL_2_FILL_ARG_REGS \
|
|
register Call_arg arg_2_reg asm("x2") = arg_2;
|
|
|
|
#define CALL_4_FILL_ARG_REGS \
|
|
CALL_3_FILL_ARG_REGS \
|
|
register Call_arg arg_3_reg asm("x3") = arg_3;
|
|
|
|
#define CALL_5_FILL_ARG_REGS \
|
|
CALL_4_FILL_ARG_REGS \
|
|
register Call_arg arg_4_reg asm("x4") = arg_4;
|
|
|
|
#define CALL_6_FILL_ARG_REGS \
|
|
CALL_5_FILL_ARG_REGS \
|
|
register Call_arg arg_5_reg asm("x5") = arg_5;
|
|
|
|
#define CALL_1_SWI "svc 0\n" : "+r" (arg_0_reg)
|
|
#define CALL_2_SWI CALL_1_SWI: "r" (arg_1_reg)
|
|
#define CALL_3_SWI CALL_2_SWI, "r" (arg_2_reg)
|
|
#define CALL_4_SWI CALL_3_SWI, "r" (arg_3_reg)
|
|
#define CALL_5_SWI CALL_4_SWI, "r" (arg_4_reg)
|
|
#define CALL_6_SWI CALL_5_SWI, "r" (arg_5_reg)
|
|
|
|
|
|
/******************
|
|
** Kernel calls **
|
|
******************/
|
|
|
|
Call_ret_64 Kernel::call64(Call_arg arg_0)
|
|
{
|
|
return Kernel::call(arg_0);
|
|
}
|
|
|
|
|
|
Call_ret Kernel::call(Call_arg arg_0)
|
|
{
|
|
CALL_1_FILL_ARG_REGS
|
|
asm volatile(CALL_1_SWI);
|
|
return arg_0_reg;
|
|
}
|
|
|
|
|
|
Call_ret Kernel::call(Call_arg arg_0,
|
|
Call_arg arg_1)
|
|
{
|
|
CALL_2_FILL_ARG_REGS
|
|
asm volatile(CALL_2_SWI);
|
|
return arg_0_reg;
|
|
}
|
|
|
|
|
|
Call_ret Kernel::call(Call_arg arg_0,
|
|
Call_arg arg_1,
|
|
Call_arg arg_2)
|
|
{
|
|
CALL_3_FILL_ARG_REGS
|
|
asm volatile(CALL_3_SWI);
|
|
return arg_0_reg;
|
|
}
|
|
|
|
|
|
Call_ret Kernel::call(Call_arg arg_0,
|
|
Call_arg arg_1,
|
|
Call_arg arg_2,
|
|
Call_arg arg_3)
|
|
{
|
|
CALL_4_FILL_ARG_REGS
|
|
asm volatile(CALL_4_SWI);
|
|
return arg_0_reg;
|
|
}
|
|
|
|
|
|
Call_ret Kernel::call(Call_arg arg_0,
|
|
Call_arg arg_1,
|
|
Call_arg arg_2,
|
|
Call_arg arg_3,
|
|
Call_arg arg_4)
|
|
{
|
|
CALL_5_FILL_ARG_REGS
|
|
asm volatile(CALL_5_SWI);
|
|
return arg_0_reg;
|
|
}
|
|
|
|
|
|
Call_ret Kernel::call(Call_arg arg_0,
|
|
Call_arg arg_1,
|
|
Call_arg arg_2,
|
|
Call_arg arg_3,
|
|
Call_arg arg_4,
|
|
Call_arg arg_5)
|
|
{
|
|
CALL_6_FILL_ARG_REGS
|
|
asm volatile(CALL_6_SWI);
|
|
return arg_0_reg;
|
|
}
|