1/*
2 * Copyright 2017, Data61
3 * Commonwealth Scientific and Industrial Research Organisation (CSIRO)
4 * ABN 41 687 119 230.
5 *
6 * This software may be distributed and modified according to the terms of
7 * the BSD 2-Clause license. Note that NO WARRANTY is provided.
8 * See "LICENSE_BSD2.txt" for details.
9 *
10 * @TAG(DATA61_BSD)
11 */
12
13#ifndef __LIBSEL4_SEL4_ARCH_FUNCTIONS_H
14#define __LIBSEL4_SEL4_ARCH_FUNCTIONS_H
15
16#include <sel4/types.h>
17#include <sel4/macros.h>
18
19/* the segment loaded into GS points directly to the IPC buffer */
20
21#define SEL4_GET_IPCBUF_SCALE(field, i, res) \
22    do {\
23        asm volatile ("movl %%fs:%c2(,%1,%c3), %0"\
24                      : [result] "=r" (res) /* outputs */\
25                      : [scale] "r" (i), /* inputs */\
26                        [offset] "i" (SEL4_OFFSETOF(seL4_IPCBuffer, field)),\
27                        [scale_factor] "i" (sizeof(seL4_Word))\
28                       /* no clobber */);\
29    } while(0)
30
31
32#define SEL4_SET_IPCBUF_SCALE(field, i, val) \
33    do {\
34        asm volatile ("movl %0, %%fs:%c2(,%1,%c3)"\
35                      : /* no outputs */\
36                      : [value] "r" (val), /* inputs */\
37                        [scale] "r" (i),\
38                        [offset] "i" (SEL4_OFFSETOF(seL4_IPCBuffer, field)),\
39                        [scale_factor] "i" (sizeof(seL4_Word))\
40                      : "memory"); /* clobber */\
41    } while(0)
42
43#define SEL4_GET_IPCBUF(field, res) \
44    do {\
45        asm volatile ("movl %%fs:%c1, %0"\
46                      : [result] "=r" (res) /* inputs */\
47                      : [offset] "i" (SEL4_OFFSETOF(seL4_IPCBuffer, field)) /* outputs */\
48                       /* no clobber */);\
49    } while(0)
50
51
52#define SEL4_SET_IPCBUF(field, val) \
53    do {\
54        asm volatile ("movl %0, %%fs:%c1"\
55                      : /* no outputs */\
56                      : [value] "r" (val), /* inputs */\
57                        [offset] "i" (SEL4_OFFSETOF(seL4_IPCBuffer, field))\
58                      : "memory"); /* clobber */\
59    } while(0)
60
61#endif
62