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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef _ASM_IA64_ASMMACRO_H |
3 | #define _ASM_IA64_ASMMACRO_H | |
4 | ||
5 | /* | |
6 | * Copyright (C) 2000-2001, 2003-2004 Hewlett-Packard Co | |
7 | * David Mosberger-Tang <davidm@hpl.hp.com> | |
8 | */ | |
9 | ||
1da177e4 LT |
10 | |
11 | #define ENTRY(name) \ | |
12 | .align 32; \ | |
13 | .proc name; \ | |
14 | name: | |
15 | ||
16 | #define ENTRY_MIN_ALIGN(name) \ | |
17 | .align 16; \ | |
18 | .proc name; \ | |
19 | name: | |
20 | ||
21 | #define GLOBAL_ENTRY(name) \ | |
22 | .global name; \ | |
23 | ENTRY(name) | |
24 | ||
25 | #define END(name) \ | |
26 | .endp name | |
27 | ||
28 | /* | |
29 | * Helper macros to make unwind directives more readable: | |
30 | */ | |
31 | ||
32 | /* prologue_gr: */ | |
33 | #define ASM_UNW_PRLG_RP 0x8 | |
34 | #define ASM_UNW_PRLG_PFS 0x4 | |
35 | #define ASM_UNW_PRLG_PSP 0x2 | |
36 | #define ASM_UNW_PRLG_PR 0x1 | |
37 | #define ASM_UNW_PRLG_GRSAVE(ninputs) (32+(ninputs)) | |
38 | ||
39 | /* | |
40 | * Helper macros for accessing user memory. | |
3283a67d JS |
41 | * |
42 | * When adding any new .section/.previous entries here, make sure to | |
43 | * also add it to the DISCARD section in arch/ia64/kernel/gate.lds.S or | |
44 | * unpleasant things will happen. | |
1da177e4 LT |
45 | */ |
46 | ||
47 | .section "__ex_table", "a" // declare section & section attributes | |
48 | .previous | |
49 | ||
50 | # define EX(y,x...) \ | |
51 | .xdata4 "__ex_table", 99f-., y-.; \ | |
52 | [99:] x | |
53 | # define EXCLR(y,x...) \ | |
54 | .xdata4 "__ex_table", 99f-., y-.+4; \ | |
55 | [99:] x | |
56 | ||
d2a28ad9 RA |
57 | /* |
58 | * Tag MCA recoverable instruction ranges. | |
59 | */ | |
60 | ||
61 | .section "__mca_table", "a" // declare section & section attributes | |
62 | .previous | |
63 | ||
64 | # define MCA_RECOVER_RANGE(y) \ | |
65 | .xdata4 "__mca_table", y-., 99f-.; \ | |
66 | [99:] | |
67 | ||
1da177e4 LT |
68 | /* |
69 | * Mark instructions that need a load of a virtual address patched to be | |
70 | * a load of a physical address. We use this either in critical performance | |
71 | * path (ivt.S - TLB miss processing) or in places where it might not be | |
72 | * safe to use a "tpa" instruction (mca_asm.S - error recovery). | |
73 | */ | |
dafb9320 | 74 | .section ".data..patch.vtop", "a" // declare section & section attributes |
1da177e4 LT |
75 | .previous |
76 | ||
77 | #define LOAD_PHYSICAL(pr, reg, obj) \ | |
78 | [1:](pr)movl reg = obj; \ | |
dafb9320 | 79 | .xdata4 ".data..patch.vtop", 1b-. |
1da177e4 LT |
80 | |
81 | /* | |
82 | * For now, we always put in the McKinley E9 workaround. On CPUs that don't need it, | |
83 | * we'll patch out the work-around bundles with NOPs, so their impact is minimal. | |
84 | */ | |
85 | #define DO_MCKINLEY_E9_WORKAROUND | |
86 | ||
87 | #ifdef DO_MCKINLEY_E9_WORKAROUND | |
dafb9320 | 88 | .section ".data..patch.mckinley_e9", "a" |
1da177e4 LT |
89 | .previous |
90 | /* workaround for Itanium 2 Errata 9: */ | |
91 | # define FSYS_RETURN \ | |
dafb9320 | 92 | .xdata4 ".data..patch.mckinley_e9", 1f-.; \ |
1da177e4 LT |
93 | 1:{ .mib; \ |
94 | nop.m 0; \ | |
95 | mov r16=ar.pfs; \ | |
96 | br.call.sptk.many b7=2f;; \ | |
97 | }; \ | |
98 | 2:{ .mib; \ | |
99 | nop.m 0; \ | |
100 | mov ar.pfs=r16; \ | |
101 | br.ret.sptk.many b6;; \ | |
102 | } | |
103 | #else | |
104 | # define FSYS_RETURN br.ret.sptk.many b6 | |
105 | #endif | |
106 | ||
a0776ec8 CK |
107 | /* |
108 | * If physical stack register size is different from DEF_NUM_STACK_REG, | |
109 | * dynamically patch the kernel for correct size. | |
110 | */ | |
dafb9320 | 111 | .section ".data..patch.phys_stack_reg", "a" |
a0776ec8 CK |
112 | .previous |
113 | #define LOAD_PHYS_STACK_REG_SIZE(reg) \ | |
114 | [1:] adds reg=IA64_NUM_PHYS_STACK_REG*8+8,r0; \ | |
dafb9320 | 115 | .xdata4 ".data..patch.phys_stack_reg", 1b-. |
a0776ec8 | 116 | |
1da177e4 LT |
117 | /* |
118 | * Up until early 2004, use of .align within a function caused bad unwind info. | |
119 | * TEXT_ALIGN(n) expands into ".align n" if a fixed GAS is available or into nothing | |
120 | * otherwise. | |
121 | */ | |
122 | #ifdef HAVE_WORKING_TEXT_ALIGN | |
123 | # define TEXT_ALIGN(n) .align n | |
124 | #else | |
125 | # define TEXT_ALIGN(n) | |
126 | #endif | |
127 | ||
128 | #ifdef HAVE_SERIALIZE_DIRECTIVE | |
129 | # define dv_serialize_data .serialize.data | |
130 | # define dv_serialize_instruction .serialize.instruction | |
131 | #else | |
132 | # define dv_serialize_data | |
133 | # define dv_serialize_instruction | |
134 | #endif | |
135 | ||
136 | #endif /* _ASM_IA64_ASMMACRO_H */ |