genode/base-nova/include/32bit/nova/syscalls.h

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/*
* \brief Syscall bindings for the NOVA microhypervisor
* \author Norman Feske
* \author Sebastian Sumpf
* \date 2009-12-27
*/
/*
* Copyright (c) 2009 Genode Labs
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef _PLATFORM__NOVA_SYSCALLS_H_
#define _PLATFORM__NOVA_SYSCALLS_H_
#include <nova/stdint.h>
#include <nova/syscall-generic.h>
#define ALWAYS_INLINE __attribute__((always_inline))
namespace Nova {
ALWAYS_INLINE
inline unsigned eax(Syscall s, uint8_t flags, unsigned sel)
{
return sel << 8 | (flags & 0xf) << 4 | s;
}
ALWAYS_INLINE
inline uint8_t syscall_0(Syscall s, uint8_t flags, unsigned sel = 0)
{
mword_t status = eax(s, flags, sel);
asm volatile (" mov %%esp, %%ecx;"
" call 0f;"
"0:"
" addl $(1f-0b), (%%esp);"
" mov (%%esp), %%edx;"
" sysenter;"
"1:"
: "+a" (status)
:
: "ecx", "edx", "memory");
return status;
}
ALWAYS_INLINE
inline uint8_t syscall_1(Syscall s, uint8_t flags, mword_t p1)
{
mword_t status = eax(s, flags, 0);
asm volatile (" mov %%esp, %%ecx;"
" call 0f;"
"0:"
" addl $(1f-0b), (%%esp);"
" mov (%%esp), %%edx;"
" sysenter;"
"1:"
: "+a" (status)
: "D" (p1)
: "ecx", "edx");
return status;
}
ALWAYS_INLINE
inline uint8_t syscall_2(Syscall s, uint8_t flags, unsigned sel, mword_t p1, mword_t p2)
{
mword_t status = eax(s, flags, sel);
asm volatile (" mov %%esp, %%ecx;"
" call 0f;"
"0:"
" addl $(1f-0b), (%%esp);"
" mov (%%esp), %%edx;"
" sysenter;"
"1:"
: "+a" (status)
: "D" (p1), "S" (p2)
: "ecx", "edx");
return status;
}
ALWAYS_INLINE
inline uint8_t syscall_3(Syscall s, uint8_t flags, unsigned sel,
mword_t p1, mword_t p2, mword_t p3)
{
mword_t status = eax(s, flags, sel);
asm volatile (" push %%ebx;"
" mov %%edx, %%ebx;"
" mov %%esp, %%ecx;"
" call 0f;"
"0:"
" addl $(1f-0b), (%%esp);"
" mov (%%esp), %%edx;"
" sysenter;"
"1:"
" pop %%ebx;"
: "+a" (status)
: "D" (p1), "S" (p2), "d" (p3)
: "ecx");
return status;
}
ALWAYS_INLINE
inline uint8_t syscall_4(Syscall s, uint8_t flags, unsigned sel,
mword_t p1, mword_t p2, mword_t p3, mword_t p4)
{
mword_t status = eax(s, flags, sel);
asm volatile (" push %%ebp;"
" push %%ebx;"
" mov %%ecx, %%ebx;"
" mov %%esp, %%ecx;"
" mov %%edx, %%ebp;"
" call 0f;"
"0:"
" addl $(1f-0b), (%%esp);"
" mov (%%esp), %%edx;"
"sysenter;"
"1:"
" pop %%ebx;"
" pop %%ebp;"
: "+a" (status)
: "D" (p1), "S" (p2), "c" (p3), "d" (p4)
: "memory");
return status;
}
ALWAYS_INLINE
inline uint8_t syscall_5(Syscall s, uint8_t flags, mword_t sel,
mword_t &p1, mword_t &p2)
{
mword_t status = eax(s, flags, sel);
asm volatile (" movl %%esp, %%ecx;"
" movl $1f, %%edx;"
"sysenter;"
"1:"
: "+a" (status), "+D" (p1), "+S" (p2)
:
: "ecx", "edx", "memory");
return status;
}
ALWAYS_INLINE
inline uint8_t call(unsigned pt)
{
return syscall_0(NOVA_CALL, 0, pt);
}
ALWAYS_INLINE
inline void reply(void *next_sp)
{
asm volatile ("sysenter;"
:
: "a" (NOVA_REPLY), "c" (next_sp)
: "memory");
}
ALWAYS_INLINE
inline uint8_t create_pd(unsigned pd0, unsigned pd, Crd crd)
{
return syscall_2(NOVA_CREATE_PD, 0, pd0, pd, crd.value());
}
ALWAYS_INLINE
inline uint8_t create_ec(unsigned ec, unsigned pd,
mword_t cpu, mword_t utcb,
mword_t esp, mword_t evt,
bool global = 0)
{
return syscall_4(NOVA_CREATE_EC, global, ec, pd,
(cpu & 0xfff) | (utcb & ~0xfff),
esp, evt);
}
ALWAYS_INLINE
inline uint8_t ec_ctrl(unsigned ec)
{
return syscall_0(NOVA_EC_CTRL, 0, ec);
}
2013-01-11 22:10:21 +00:00
ALWAYS_INLINE
inline uint8_t create_sc(unsigned sc, unsigned pd, unsigned ec, Qpd qpd)
{
return syscall_3(NOVA_CREATE_SC, 0, sc, pd, ec, qpd.value());
}
ALWAYS_INLINE
inline uint8_t create_pt(unsigned pt, unsigned pd, unsigned ec, Mtd mtd, mword_t eip)
{
return syscall_4(NOVA_CREATE_PT, 0, pt, pd, ec, mtd.value(), eip);
}
ALWAYS_INLINE
inline uint8_t create_sm(unsigned sm, unsigned pd, mword_t cnt)
{
return syscall_2(NOVA_CREATE_SM, 0, sm, pd, cnt);
}
ALWAYS_INLINE
inline uint8_t revoke(Crd crd, bool self = true)
{
return syscall_1(NOVA_REVOKE, self, crd.value());
}
ALWAYS_INLINE
inline uint8_t lookup(Crd &crd)
{
mword_t status = eax(NOVA_LOOKUP, 0, 0);
mword_t raw = crd.value();
asm volatile (" mov %%esp, %%ecx;"
" call 0f;"
"0:"
" addl $(1f-0b), (%%esp);"
" mov (%%esp), %%edx;"
" sysenter;"
"1:"
: "+a" (status), "+D" (raw)
:
: "ecx", "edx", "memory");
crd = Crd(raw);
return status;
}
ALWAYS_INLINE
inline uint8_t sm_ctrl(unsigned sm, Sem_op op)
{
return syscall_0(NOVA_SM_CTRL, op, sm);
}
ALWAYS_INLINE
inline uint8_t assign_pci(mword_t pd, mword_t mem, mword_t rid)
{
return syscall_2(NOVA_ASSIGN_PCI, 0, pd, mem, rid);
}
ALWAYS_INLINE
inline uint8_t assign_gsi(mword_t sm, mword_t dev, mword_t cpu, mword_t &msi_addr, mword_t &msi_data)
{
msi_addr = dev;
msi_data = cpu;
return syscall_5(NOVA_ASSIGN_GSI, 0, sm, msi_addr, msi_data);
}
}
#endif /* _PLATFORM__NOVA_SYSCALLS_H_ */