1 /**
2 * \file
3 * \brief UTCB definitions for ARM.
4 * \ingroup l4_utcb_api
5 */
6 /*
7 * (c) 2008-2009 Adam Lackorzynski <adam@os.inf.tu-dresden.de>,
8 * Alexander Warg <warg@os.inf.tu-dresden.de>
9 * economic rights: Technische Universität Dresden (Germany)
10 *
11 * This file is part of TUD:OS and distributed under the terms of the
12 * GNU General Public License 2.
13 * Please see the COPYING-GPL-2 file for details.
14 *
15 * As a special exception, you may use this file as part of a free software
16 * library without restriction. Specifically, if other files instantiate
17 * templates or use macros or inline functions from this file, or you compile
18 * this file and link it with other files to produce an executable, this
19 * file does not by itself cause the resulting executable to be covered by
20 * the GNU General Public License. This exception does not however
21 * invalidate any other reasons why the executable file might be covered by
22 * the GNU General Public License.
23 */
24 #ifndef __L4_SYS__INCLUDE__ARCH_ARM__UTCB_H__
25 #define __L4_SYS__INCLUDE__ARCH_ARM__UTCB_H__
26
27 #include <l4/sys/types.h>
28
29 /**
30 * \defgroup l4_utcb_api_arm ARM Virtual Registers (UTCB)
31 * \ingroup l4_utcb_api
32 */
33
34 /**
35 * \brief UTCB structure for exceptions.
36 * \ingroup l4_utcb_api_arm
37 */
38 typedef struct l4_exc_regs_t
39 {
40 l4_umword_t pfa; /**< page fault address */
41 l4_umword_t err; /**< error code */
42
43 l4_umword_t r[13]; /**< registers */
44 l4_umword_t sp; /**< stack pointer */
45 l4_umword_t ulr; /**< ulr */
46 l4_umword_t _dummy1; /**< dummy \internal */
47 l4_umword_t pc; /**< pc */
48 l4_umword_t cpsr; /**< cpsr */
49 l4_umword_t tpidruro;/**< Thread-ID register */
50 } l4_exc_regs_t;
51
52 /**
53 * \brief UTCB constants for ARM
54 * \ingroup l4_utcb_api_arm
55 * \hideinitializer
56 */
57 enum L4_utcb_consts_arm
58 {
59 L4_UTCB_EXCEPTION_REGS_SIZE = sizeof(l4_exc_regs_t) / sizeof(l4_umword_t),
60 L4_UTCB_GENERIC_DATA_SIZE = 63,
61 L4_UTCB_GENERIC_BUFFERS_SIZE = 58,
62
63 L4_UTCB_MSG_REGS_OFFSET = 0,
64 L4_UTCB_BUF_REGS_OFFSET = 64 * sizeof(l4_umword_t),
65 L4_UTCB_THREAD_REGS_OFFSET = 123 * sizeof(l4_umword_t),
66
67 L4_UTCB_INHERIT_FPU = 1UL << 24,
68
69 L4_UTCB_OFFSET = 512,
70 };
71
72 #include_next <l4/sys/utcb.h>
73
74 /*
75 * ==================================================================
76 * Implementations.
77 */
78
79 #ifdef __GNUC__
l4_utcb_direct(void)80 L4_INLINE l4_utcb_t *l4_utcb_direct(void) L4_NOTHROW
81 {
82 register l4_utcb_t *utcb __asm__ ("r0");
83 __asm__ ("mov lr, pc \n"
84 "mov pc, #0xffffff00 \n"
85 : "=r"(utcb) : : "lr");
86 return utcb;
87 }
88 #endif
89
l4_utcb_exc_pc(l4_exc_regs_t const * u)90 L4_INLINE l4_umword_t l4_utcb_exc_pc(l4_exc_regs_t const *u) L4_NOTHROW
91 {
92 return u->pc;
93 }
94
l4_utcb_exc_pc_set(l4_exc_regs_t * u,l4_addr_t pc)95 L4_INLINE void l4_utcb_exc_pc_set(l4_exc_regs_t *u, l4_addr_t pc) L4_NOTHROW
96 {
97 u->pc = pc;
98 }
99
l4_utcb_exc_typeval(l4_exc_regs_t const * u)100 L4_INLINE l4_umword_t l4_utcb_exc_typeval(l4_exc_regs_t const *u) L4_NOTHROW
101 {
102 return u->err >> 26;
103 }
104
l4_utcb_exc_is_pf(l4_exc_regs_t const * u)105 L4_INLINE int l4_utcb_exc_is_pf(l4_exc_regs_t const *u) L4_NOTHROW
106 {
107 return ((u->err >> 26) & 0x30) == 0x20;
108 }
109
l4_utcb_exc_pfa(l4_exc_regs_t const * u)110 L4_INLINE l4_addr_t l4_utcb_exc_pfa(l4_exc_regs_t const *u) L4_NOTHROW
111 {
112 return (u->pfa & ~7UL) | ((u->err >> 5) & 2);
113 }
114
l4_utcb_exc_is_ex_regs_exception(l4_exc_regs_t const * u)115 L4_INLINE int l4_utcb_exc_is_ex_regs_exception(l4_exc_regs_t const *u) L4_NOTHROW
116 {
117 return l4_utcb_exc_typeval(u) == 0x3e;
118 }
119
120 #endif /* ! __L4_SYS__INCLUDE__ARCH_ARM__UTCB_H__ */
121