1 /**
2 * \file
3 * \brief UTCB definitions for PPC32.
4 * \ingroup l4_utcb_api
5 */
6 /*
7 * (c) 2008-2009 Adam Lackorzynski <adam@os.inf.tu-dresden.de>
8 * economic rights: Technische Universität Dresden (Germany)
9 *
10 * This file is part of TUD:OS and distributed under the terms of the
11 * GNU General Public License 2.
12 * Please see the COPYING-GPL-2 file for details.
13 *
14 * As a special exception, you may use this file as part of a free software
15 * library without restriction. Specifically, if other files instantiate
16 * templates or use macros or inline functions from this file, or you compile
17 * this file and link it with other files to produce an executable, this
18 * file does not by itself cause the resulting executable to be covered by
19 * the GNU General Public License. This exception does not however
20 * invalidate any other reasons why the executable file might be covered by
21 * the GNU General Public License.
22 */
23 #ifndef __L4_SYS__INCLUDE__ARCH_PPC32__UTCB_H__
24 #define __L4_SYS__INCLUDE__ARCH_PPC32__UTCB_H__
25
26 #include <l4/sys/types.h>
27
28 /**
29 * \defgroup l4_utcb_api_arm PPC32 Virtual Registers (UTCB)
30 * \ingroup l4_utcb_api
31 */
32
33 /**
34 * \brief UTCB constants for PPC32
35 * \ingroup l4_utcb_api_arm
36 * \hideinitializer
37 */
38 enum L4_utcb_consts_ppc32
39 {
40 L4_UTCB_EXCEPTION_REGS_SIZE = 39,
41 L4_UTCB_GENERIC_DATA_SIZE = 63,
42 L4_UTCB_GENERIC_BUFFERS_SIZE = 58,
43
44 L4_UTCB_MSG_REGS_OFFSET = 0,
45 L4_UTCB_BUF_REGS_OFFSET = 64 * sizeof(l4_umword_t),
46 L4_UTCB_THREAD_REGS_OFFSET = 123 * sizeof(l4_umword_t),
47
48 L4_UTCB_INHERIT_FPU = 1UL << 24,
49
50 L4_UTCB_OFFSET = 512,
51 };
52
53 /**
54 * \brief UTCB structure for exceptions.
55 * \ingroup l4_utcb_api_arm
56 */
57 typedef struct l4_exc_regs_t
58 {
59 l4_umword_t pfa; /**< page fault address */
60 l4_umword_t err; /**< error code */
61
62 l4_umword_t r[28]; /** GPR 0,3 .. 10, 13 .. 31 */
63 l4_umword_t xer; /**< fixed point exception register */
64 l4_umword_t ctr; /**< count register */
65 l4_umword_t cr; /**< condition register */
66 l4_umword_t dummy; /**< dummy */
67 l4_umword_t srr0; /**< IP */
68 l4_umword_t lr; /**< ulr */
69 l4_umword_t sp; /**< stack pointer */
70 l4_umword_t r12; /**< GPR 12 */
71 l4_umword_t r11; /**< GPR 11 */
72 } l4_exc_regs_t;
73
74 #include_next <l4/sys/utcb.h>
75
76 /*
77 * ==================================================================
78 * Implementations.
79 */
80
81 #ifdef __GNUC__
l4_utcb_direct(void)82 L4_INLINE l4_utcb_t *l4_utcb_direct(void) L4_NOTHROW
83 {
84 l4_utcb_t *utcb;
85
86 __asm__
87 ("mr %[utcb], %%r2\n"
88 : [utcb] "=r" (utcb)
89 : );
90
91 return utcb;
92 }
93 #endif
94
l4_utcb_exc_pc(l4_exc_regs_t const * u)95 L4_INLINE l4_umword_t l4_utcb_exc_pc(l4_exc_regs_t const *u) L4_NOTHROW
96 {
97 return u->srr0;
98 }
99
l4_utcb_exc_pc_set(l4_exc_regs_t * u,l4_addr_t pc)100 L4_INLINE void l4_utcb_exc_pc_set(l4_exc_regs_t *u, l4_addr_t pc) L4_NOTHROW
101 {
102 u->srr0 = pc;
103 }
104
l4_utcb_exc_typeval(l4_exc_regs_t const * u)105 L4_INLINE l4_umword_t l4_utcb_exc_typeval(l4_exc_regs_t const *u) L4_NOTHROW
106 {
107 return u->err;
108 }
109
110 //TODO: cbass check pfa values
l4_utcb_exc_is_pf(l4_exc_regs_t const * u)111 L4_INLINE int l4_utcb_exc_is_pf(l4_exc_regs_t const *u) L4_NOTHROW
112 {
113 return u->err & 0x00010000;
114 }
115
l4_utcb_exc_pfa(l4_exc_regs_t const * u)116 L4_INLINE l4_addr_t l4_utcb_exc_pfa(l4_exc_regs_t const *u) L4_NOTHROW
117 {
118 return (u->pfa & ~7UL) | (!(u->err & 0x00020000) << 1);
119 }
120
l4_utcb_exc_is_ex_regs_exception(l4_exc_regs_t const * u)121 L4_INLINE int l4_utcb_exc_is_ex_regs_exception(l4_exc_regs_t const *u) L4_NOTHROW
122 {
123 // ex_regs trigger exception not implemented.
124 (void)u;
125 return 0;
126 }
127
128 #endif /* ! __L4_SYS__INCLUDE__ARCH_PPC32__UTCB_H__ */
129