Merge branch 'x86/uv' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux...
[linux-2.6.git] / arch / m32r / include / asm / flat.h
1 /*
2  * include/asm-m32r/flat.h
3  *
4  * uClinux flat-format executables
5  *
6  * Copyright (C) 2004  Kazuhiro Inaoka
7  *
8  * This file is subject to the terms and conditions of the GNU General Public
9  * License.  See the file "COPYING" in the main directory of this archive for
10  * more details.
11  */
12 #ifndef __ASM_M32R_FLAT_H
13 #define __ASM_M32R_FLAT_H
14
15 #define flat_stack_align(sp)            (*sp += (*sp & 3 ? (4 - (*sp & 3)): 0))
16 #define flat_argvp_envp_on_stack()              0
17 #define flat_old_ram_flag(flags)                (flags)
18 #define flat_set_persistent(relval, p)          0
19 #define flat_reloc_valid(reloc, size)           \
20         (((reloc) - textlen_for_m32r_lo16_data) <= (size))
21 #define flat_get_addr_from_rp(rp, relval, flags, persistent) \
22         m32r_flat_get_addr_from_rp(rp, relval, (text_len) )
23
24 #define flat_put_addr_at_rp(rp, addr, relval) \
25         m32r_flat_put_addr_at_rp(rp, addr, relval)
26
27 /* Convert a relocation entry into an address.  */
28 static inline unsigned long
29 flat_get_relocate_addr (unsigned long relval)
30 {
31         return relval & 0x00ffffff; /* Mask out top 8-bits */
32 }
33
34 #define flat_m32r_get_reloc_type(relval)        ((relval) >> 24)
35
36 #define M32R_SETH_OPCODE        0xd0c00000 /* SETH instruction code */
37
38 #define FLAT_M32R_32            0x00    /* 32bits reloc */
39 #define FLAT_M32R_24            0x01    /* unsigned 24bits reloc */
40 #define FLAT_M32R_16            0x02    /* 16bits reloc */
41 #define FLAT_M32R_LO16          0x03    /* signed low 16bits reloc (low()) */
42 #define FLAT_M32R_LO16_DATA     0x04    /* signed low 16bits reloc (low())
43                                            for a symbol in .data section */
44                                         /* High 16bits of an address used
45                                            when the lower 16bbits are treated
46                                            as unsigned.
47                                            To create SETH instruction only.
48                                            0x1X: X means a number of register.
49                                            0x10 - 0x3F are reserved. */
50 #define FLAT_M32R_HI16_ULO      0x10    /* reloc for SETH Rn,#high(imm16) */
51                                         /* High 16bits of an address used
52                                            when the lower 16bbits are treated
53                                            as signed.
54                                            To create SETH instruction only.
55                                            0x2X: X means a number of register.
56                                            0x20 - 0x4F are reserved. */
57 #define FLAT_M32R_HI16_SLO      0x20    /* reloc for SETH Rn,#shigh(imm16) */
58
59 static unsigned long textlen_for_m32r_lo16_data = 0;
60
61 static inline unsigned long m32r_flat_get_addr_from_rp (unsigned long *rp,
62                                                         unsigned long relval,
63                                                         unsigned long textlen)
64 {
65         unsigned int reloc = flat_m32r_get_reloc_type (relval);
66         textlen_for_m32r_lo16_data = 0;
67         if (reloc & 0xf0) {
68                 unsigned long addr = htonl(*rp);
69                 switch (reloc & 0xf0)
70                 {
71                 case FLAT_M32R_HI16_ULO:
72                 case FLAT_M32R_HI16_SLO:
73                         if (addr == 0) {
74                                 /* put "seth Rn,#0x0" instead of 0 (addr). */
75                                 *rp = (M32R_SETH_OPCODE | ((reloc & 0x0f)<<24));
76                         }
77                         return addr;
78                 default:
79                         break;
80                 }
81         } else {
82                 switch (reloc)
83                 {
84                 case FLAT_M32R_LO16:
85                         return htonl(*rp) & 0xFFFF;
86                 case FLAT_M32R_LO16_DATA:
87                         /* FIXME: The return value will decrease by textlen
88                            at m32r_flat_put_addr_at_rp () */
89                         textlen_for_m32r_lo16_data = textlen;
90                         return (htonl(*rp) & 0xFFFF) + textlen;
91                 case FLAT_M32R_16:
92                         return htons(*(unsigned short *)rp) & 0xFFFF;
93                 case FLAT_M32R_24:
94                         return htonl(*rp) & 0xFFFFFF;
95                 case FLAT_M32R_32:
96                         return htonl(*rp);
97                 default:
98                         break;
99                 }
100         }
101         return ~0;      /* bogus value */
102 }
103
104 static inline void m32r_flat_put_addr_at_rp (unsigned long *rp,
105                                              unsigned long addr,
106                                              unsigned long relval)
107 {
108         unsigned int reloc = flat_m32r_get_reloc_type (relval);
109         if (reloc & 0xf0) {
110                 unsigned long Rn = reloc & 0x0f; /* get a number of register */
111                 Rn <<= 24; /* 0x0R000000 */
112                 reloc &= 0xf0;
113                 switch (reloc)
114                 {
115                 case FLAT_M32R_HI16_ULO: /* To create SETH Rn,#high(imm16) */
116                         *rp = (M32R_SETH_OPCODE | Rn
117                                | ((addr >> 16) & 0xFFFF));
118                         break;
119                 case FLAT_M32R_HI16_SLO: /* To create SETH Rn,#shigh(imm16) */
120                         *rp = (M32R_SETH_OPCODE | Rn
121                                | (((addr >> 16) + ((addr & 0x8000) ? 1 : 0))
122                                   & 0xFFFF));
123                         break;
124                 }
125         } else {
126                 switch (reloc) {
127                 case FLAT_M32R_LO16_DATA:
128                         addr -= textlen_for_m32r_lo16_data;
129                         textlen_for_m32r_lo16_data = 0;
130                 case FLAT_M32R_LO16:
131                         *rp = (htonl(*rp) & 0xFFFF0000) | (addr & 0xFFFF);
132                         break;
133                 case FLAT_M32R_16:
134                         *(unsigned short *)rp = addr & 0xFFFF;
135                         break;
136                 case FLAT_M32R_24:
137                         *rp = (htonl(*rp) & 0xFF000000) | (addr & 0xFFFFFF);
138                         break;
139                 case FLAT_M32R_32:
140                         *rp = addr;
141                         break;
142                 }
143         }
144 }
145
146 #endif /* __ASM_M32R_FLAT_H */