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277 lines
6.7 KiB
C++
277 lines
6.7 KiB
C++
/*
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* \brief Syscall bindings for the NOVA microhypervisor x86_64
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* \author Norman Feske
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* \author Sebastian Sumpf
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* \author Alexander Boettcher
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* \date 2012-06-06
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*/
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/*
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* Copyright (c) 2012 Genode Labs
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef _PLATFORM__NOVA_SYSCALLS_H_
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#define _PLATFORM__NOVA_SYSCALLS_H_
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#include <nova/stdint.h>
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#include <nova/syscall-generic.h>
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#define ALWAYS_INLINE __attribute__((always_inline))
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namespace Nova {
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ALWAYS_INLINE
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inline mword_t rdi(Syscall s, uint8_t flags, mword_t sel)
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{
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return sel << 8 | (flags & 0xf) << 4 | s;
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}
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ALWAYS_INLINE
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inline uint8_t syscall_0(Syscall s, uint8_t flags, mword_t sel = 0)
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{
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mword_t status = rdi(s, flags, sel);
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asm volatile ("syscall"
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: "+D" (status)
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:
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: "rcx", "r11", "memory");
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return status;
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}
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ALWAYS_INLINE
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inline uint8_t syscall_1(Syscall s, uint8_t flags, mword_t sel, mword_t p1,
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mword_t * p2 = 0)
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{
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mword_t status = rdi(s, flags, sel);
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asm volatile ("syscall"
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: "+D" (status), "+S" (p1)
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:
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: "rcx", "r11", "memory");
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if (p2) *p2 = p1;
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return status;
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}
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ALWAYS_INLINE
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inline uint8_t syscall_2(Syscall s, uint8_t flags, mword_t sel, mword_t p1,
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mword_t p2)
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{
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mword_t status = rdi(s, flags, sel);
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asm volatile ("syscall"
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: "+D" (status)
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: "S" (p1), "d" (p2)
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: "rcx", "r11", "memory");
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return status;
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}
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ALWAYS_INLINE
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inline uint8_t syscall_3(Syscall s, uint8_t flags, unsigned sel,
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mword_t p1, mword_t p2, mword_t p3)
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{
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mword_t status = rdi(s, flags, sel);
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asm volatile ("syscall"
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: "+D" (status)
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: "S" (p1), "d" (p2), "a" (p3)
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: "rcx", "r11", "memory");
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return status;
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}
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ALWAYS_INLINE
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inline uint8_t syscall_4(Syscall s, uint8_t flags, mword_t sel,
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mword_t p1, mword_t p2, mword_t p3, mword_t p4)
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{
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mword_t status = rdi(s, flags, sel);
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register mword_t r8 asm ("r8") = p4;
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asm volatile ("syscall;"
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: "+D" (status)
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: "S" (p1), "d" (p2), "a" (p3), "r" (r8)
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: "rcx", "r11", "memory");
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return status;
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}
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ALWAYS_INLINE
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inline uint8_t syscall_5(Syscall s, uint8_t flags, mword_t sel,
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mword_t &p1, mword_t &p2)
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{
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mword_t status = rdi(s, flags, sel);
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asm volatile ("syscall"
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: "+D" (status), "+S"(p1), "+d"(p2)
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:
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: "rcx", "r11", "memory");
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return status;
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}
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ALWAYS_INLINE
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inline uint8_t call(mword_t pt)
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{
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return syscall_0(NOVA_CALL, 0, pt);
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}
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ALWAYS_INLINE
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__attribute__((noreturn))
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inline void reply(void *next_sp, unsigned long sm = 0)
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{
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mword_t syscall = rdi(NOVA_REPLY, 0, sm);
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asm volatile ("mov %1, %%rsp;"
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"syscall;"
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:
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: "D" (syscall), "ir" (next_sp)
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: "memory");
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__builtin_unreachable();
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}
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ALWAYS_INLINE
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inline uint8_t create_pd(mword_t pd0, mword_t pd, Crd crd)
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{
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return syscall_2(NOVA_CREATE_PD, 0, pd0, pd, crd.value());
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}
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ALWAYS_INLINE
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inline uint8_t create_ec(mword_t ec, mword_t pd,
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mword_t cpu, mword_t utcb,
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mword_t esp, mword_t evt,
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bool global = 0)
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{
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return syscall_4(NOVA_CREATE_EC, global, ec, pd,
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(cpu & 0xfff) | (utcb & ~0xfff),
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esp, evt);
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}
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ALWAYS_INLINE
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inline uint8_t ec_ctrl(Ec_op op, mword_t ec = ~0UL, mword_t para = ~0UL)
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{
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return syscall_1(NOVA_EC_CTRL, op, ec, para);
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}
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ALWAYS_INLINE
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inline uint8_t create_sc(mword_t sc, mword_t pd, mword_t ec, Qpd qpd)
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{
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return syscall_3(NOVA_CREATE_SC, 0, sc, pd, ec, qpd.value());
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}
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ALWAYS_INLINE
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inline uint8_t pt_ctrl(mword_t pt, mword_t pt_id)
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{
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return syscall_1(NOVA_PT_CTRL, 0, pt, pt_id);
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}
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ALWAYS_INLINE
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inline uint8_t create_pt(mword_t pt, mword_t pd, mword_t ec, Mtd mtd,
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mword_t rip, bool id_equal_pt = true)
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{
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uint8_t res = syscall_4(NOVA_CREATE_PT, 0, pt, pd, ec, mtd.value(), rip);
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if (!id_equal_pt || res != NOVA_OK)
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return res;
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return pt_ctrl(pt, pt);
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}
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ALWAYS_INLINE
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inline uint8_t create_sm(mword_t sm, mword_t pd, mword_t cnt)
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{
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return syscall_2(NOVA_CREATE_SM, 0, sm, pd, cnt);
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}
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ALWAYS_INLINE
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inline uint8_t revoke(Crd crd, bool self = true)
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{
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return syscall_1(NOVA_REVOKE, self, 0, crd.value());
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}
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ALWAYS_INLINE
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inline uint8_t lookup(Crd &crd)
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{
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mword_t crd_r;
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uint8_t res = syscall_1(NOVA_LOOKUP, 0, 0, crd.value(), &crd_r);
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crd = Crd(crd_r);
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return res;
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}
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ALWAYS_INLINE
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inline uint8_t sm_ctrl(mword_t sm, Sem_op op, unsigned long long timeout = 0)
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{
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return syscall_2(NOVA_SM_CTRL, op, sm, timeout >> 32,
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timeout & 0xFFFFFFFFULL);
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}
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ALWAYS_INLINE
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inline uint8_t sc_ctrl(mword_t sm, Sem_op op, mword_t &time)
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{
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mword_t status = rdi(NOVA_SC_CTRL, op, sm);
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mword_t time_h;
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uint8_t res = syscall_5(NOVA_SC_CTRL, op, sm, time_h, time);
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asm volatile ("syscall"
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: "+D" (status), "=S"(time_h), "=d"(time)
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:
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: "rcx", "r11", "memory");
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time = (time_h & ~0xFFFFFFFFULL) | (time & 0xFFFFFFFFULL);
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return res;
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}
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ALWAYS_INLINE
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inline uint8_t assign_pci(mword_t pd, mword_t mem, mword_t rid)
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{
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return syscall_2(NOVA_ASSIGN_PCI, 0, pd, mem, rid);
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}
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ALWAYS_INLINE
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inline uint8_t assign_gsi(mword_t sm, mword_t dev, mword_t cpu,
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mword_t &msi_addr, mword_t &msi_data)
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{
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msi_addr = dev;
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msi_data = cpu;
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return syscall_5(NOVA_ASSIGN_GSI, 0, sm, msi_addr, msi_data);
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}
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}
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#endif /* _PLATFORM__NOVA_SYSCALLS_H_ */
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