Rev 959 | Rev 1702 | Go to most recent revision | Only display areas with differences | Regard whitespace | Details | Blame | Last modification | View Log | RSS feed
Rev 959 | Rev 1100 | ||
---|---|---|---|
1 | /* |
1 | /* |
2 | * Copyright (C) 2006 Ondrej Palkovsky |
2 | * Copyright (C) 2006 Ondrej Palkovsky |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | #include <syscall/syscall.h> |
29 | #include <syscall/syscall.h> |
30 | #include <arch/syscall.h> |
30 | #include <arch/syscall.h> |
31 | #include <panic.h> |
31 | #include <panic.h> |
32 | #include <arch/cpu.h> |
32 | #include <arch/cpu.h> |
33 | #include <arch/pm.h> |
33 | #include <arch/pm.h> |
34 | #include <arch/asm.h> |
34 | #include <arch/asm.h> |
35 | 35 | ||
36 | #include <print.h> |
36 | #include <print.h> |
37 | #include <arch/cpu.h> |
37 | #include <arch/cpu.h> |
38 | 38 | ||
39 | extern void syscall_entry(void); |
39 | extern void syscall_entry(void); |
40 | 40 | ||
41 | /** Enable & setup support for SYSCALL/SYSRET */ |
41 | /** Enable & setup support for SYSCALL/SYSRET */ |
42 | void syscall_setup_cpu(void) |
42 | void syscall_setup_cpu(void) |
43 | { |
43 | { |
44 | /* Enable SYSCALL/SYSRET */ |
44 | /* Enable SYSCALL/SYSRET */ |
45 | set_efer_flag(AMD_SCE_FLAG); |
45 | set_efer_flag(AMD_SCE_FLAG); |
46 | 46 | ||
47 | /* Setup syscall entry address */ |
47 | /* Setup syscall entry address */ |
48 | 48 | ||
49 | /* This is _mess_ - the 64-bit CS is argument+16, |
49 | /* This is _mess_ - the 64-bit CS is argument+16, |
50 | * the SS is argument+8. The order is: |
50 | * the SS is argument+8. The order is: |
51 | * +0(KDATA_DES), +8(UDATA_DES), +16(UTEXT_DES) |
51 | * +0(KDATA_DES), +8(UDATA_DES), +16(UTEXT_DES) |
52 | */ |
52 | */ |
53 | write_msr(AMD_MSR_STAR, |
53 | write_msr(AMD_MSR_STAR, |
54 | ((__u64)(gdtselector(KDATA_DES) | PL_USER)<<48) \ |
54 | ((__u64)(gdtselector(KDATA_DES) | PL_USER)<<48) \ |
55 | | ((__u64)(gdtselector(KTEXT_DES) | PL_KERNEL)<<32)); |
55 | | ((__u64)(gdtselector(KTEXT_DES) | PL_KERNEL)<<32)); |
56 | write_msr(AMD_MSR_LSTAR, (__u64)syscall_entry); |
56 | write_msr(AMD_MSR_LSTAR, (__u64)syscall_entry); |
57 | /* Mask RFLAGS on syscall |
57 | /* Mask RFLAGS on syscall |
58 | * - disable interrupts, until we exchange the stack register |
58 | * - disable interrupts, until we exchange the stack register |
59 | * (mask the IE bit) |
59 | * (mask the IE bit) |
60 | */ |
60 | */ |
61 | write_msr(AMD_MSR_SFMASK, 0x200); |
61 | write_msr(AMD_MSR_SFMASK, 0x200); |
62 | } |
62 | } |
63 | - | ||
64 | /** Dispatch system call */ |
- | |
65 | __native syscall_handler(__native a1, __native a2, __native a3, |
- | |
66 | __native a4, __native id) |
- | |
67 | { |
- | |
68 | if (id < SYSCALL_END) |
- | |
69 | return syscall_table[id](a1,a2,a3,a4); |
- | |
70 | else |
- | |
71 | panic("Undefined syscall %d", id); |
- | |
72 | } |
- | |
73 | 63 |