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/*
* ARM AArch64 VM parameters definitions for bsd-user.
*
* Copyright (c) 2015 Stacey D. Son <sson at FreeBSD>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef TARGET_ARCH_VMPARAM_H
#define TARGET_ARCH_VMPARAM_H
#include "cpu.h"
/**
* FreeBSD/arm64 Address space layout.
*
* ARMv8 implements up to a 48 bit virtual address space. The address space is
* split into 2 regions at each end of the 64 bit address space, with an
* out of range "hole" in the middle.
*
* We limit the size of the two spaces to 39 bits each.
*
* Upper region: 0xffffffffffffffff
* 0xffffff8000000000
*
* Hole: 0xffffff7fffffffff
* 0x0000008000000000
*
* Lower region: 0x0000007fffffffff
* 0x0000000000000000
*
* The upper region for the kernel, and the lower region for userland.
*/
/* compare to sys/arm64/include/vmparam.h */
#define TARGET_MAXTSIZ (1 * GiB) /* max text size */
#define TARGET_DFLDSIZ (128 * MiB) /* initial data size limit */
#define TARGET_MAXDSIZ (1 * GiB) /* max data size */
#define TARGET_DFLSSIZ (128 * MiB) /* initial stack size limit */
#define TARGET_MAXSSIZ (1 * GiB) /* max stack size */
#define TARGET_SGROWSIZ (128 * KiB) /* amount to grow stack */
/* KERNBASE - 512 MB */
#define TARGET_VM_MAXUSER_ADDRESS (0x00007fffff000000ULL - (512 * MiB))
#define TARGET_USRSTACK TARGET_VM_MAXUSER_ADDRESS
static inline abi_ulong get_sp_from_cpustate(CPUARMState *state)
{
return state->xregs[31]; /* sp */
}
static inline void set_second_rval(CPUARMState *state, abi_ulong retval2)
{
state->xregs[1] = retval2; /* XXX not really used on 64-bit arch */
}
static inline abi_ulong get_second_rval(CPUARMState *state)
{
return state->xregs[1];
}
#endif /* TARGET_ARCH_VMPARAM_H */
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