mirror of
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266 lines
6.5 KiB
C++
266 lines
6.5 KiB
C++
/*
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* \brief Syscall bindings for the NOVA microhypervisor
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* \author Norman Feske
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* \author Sebastian Sumpf
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* \date 2009-12-27
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*/
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/*
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* Copyright (c) 2009 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 unsigned eax(Syscall s, uint8_t flags, unsigned 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, unsigned sel = 0)
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{
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mword_t status = eax(s, flags, sel);
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asm volatile (" mov %%esp, %%ecx;"
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" call 0f;"
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"0:"
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" addl $(1f-0b), (%%esp);"
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" mov (%%esp), %%edx;"
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" sysenter;"
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"1:"
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: "+a" (status)
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:
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: "ecx", "edx", "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 p1)
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{
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mword_t status = eax(s, flags, 0);
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asm volatile (" mov %%esp, %%ecx;"
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" call 0f;"
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"0:"
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" addl $(1f-0b), (%%esp);"
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" mov (%%esp), %%edx;"
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" sysenter;"
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"1:"
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: "+a" (status)
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: "D" (p1)
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: "ecx", "edx");
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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, unsigned sel, mword_t p1, mword_t p2)
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{
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mword_t status = eax(s, flags, sel);
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asm volatile (" mov %%esp, %%ecx;"
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" call 0f;"
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"0:"
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" addl $(1f-0b), (%%esp);"
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" mov (%%esp), %%edx;"
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" sysenter;"
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"1:"
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: "+a" (status)
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: "D" (p1), "S" (p2)
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: "ecx", "edx");
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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 = eax(s, flags, sel);
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asm volatile (" push %%ebx;"
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" mov %%edx, %%ebx;"
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" mov %%esp, %%ecx;"
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" call 0f;"
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"0:"
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" addl $(1f-0b), (%%esp);"
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" mov (%%esp), %%edx;"
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" sysenter;"
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"1:"
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" pop %%ebx;"
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: "+a" (status)
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: "D" (p1), "S" (p2), "d" (p3)
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: "ecx");
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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, unsigned 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 = eax(s, flags, sel);
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asm volatile (" push %%ebp;"
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" push %%ebx;"
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" mov %%ecx, %%ebx;"
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" mov %%esp, %%ecx;"
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" mov %%edx, %%ebp;"
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" call 0f;"
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"0:"
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" addl $(1f-0b), (%%esp);"
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" mov (%%esp), %%edx;"
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"sysenter;"
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"1:"
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" pop %%ebx;"
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" pop %%ebp;"
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: "+a" (status)
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: "D" (p1), "S" (p2), "c" (p3), "d" (p4)
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: "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(unsigned 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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inline void reply(void *next_sp)
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{
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asm volatile ("sysenter;"
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:
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: "a" (NOVA_REPLY), "c" (next_sp)
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: "memory");
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}
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ALWAYS_INLINE
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inline uint8_t create_pd(unsigned pd0, unsigned 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(unsigned ec, unsigned 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(unsigned ec)
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{
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return syscall_0(NOVA_EC_CTRL, 0, ec);
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}
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ALWAYS_INLINE
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inline uint8_t create_sc(unsigned sc, unsigned pd, unsigned 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 create_pt(unsigned pt, unsigned pd, unsigned ec, Mtd mtd, mword_t eip)
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{
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return syscall_4(NOVA_CREATE_PT, 0, pt, pd, ec, mtd.value(), eip);
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}
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ALWAYS_INLINE
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inline uint8_t create_sm(unsigned sm, unsigned 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, 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 status = eax(NOVA_LOOKUP, 0, 0);
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mword_t raw = crd.value();
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asm volatile (" mov %%esp, %%ecx;"
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" call 0f;"
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"0:"
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" addl $(1f-0b), (%%esp);"
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" mov (%%esp), %%edx;"
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" sysenter;"
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"1:"
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: "+a" (status), "+D" (raw)
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:
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: "ecx", "edx", "memory");
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crd = Crd(raw);
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return status;
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}
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ALWAYS_INLINE
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inline uint8_t sm_ctrl(unsigned sm, Sem_op op)
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{
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return syscall_0(NOVA_SM_CTRL, op, sm);
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}
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ALWAYS_INLINE
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inline uint8_t assign_gsi(unsigned sm, mword_t dev, mword_t cpu)
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{
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return syscall_2(NOVA_ASSIGN_GSI, 0, sm, dev, cpu);
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}
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}
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#endif /* _PLATFORM__NOVA_SYSCALLS_H_ */
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