[c62d36f] | 1 | /* asm.h |
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| 2 | * |
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| 3 | * This include file attempts to address the problems |
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| 4 | * caused by incompatible flavors of assemblers and |
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| 5 | * toolsets. It primarily addresses variations in the |
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| 6 | * use of leading underscores on symbols and the requirement |
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| 7 | * that register names be preceded by a %. |
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| 8 | * |
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| 9 | * |
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| 10 | * NOTE: The spacing in the use of these macros |
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| 11 | * is critical to them working as advertised. |
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| 12 | * |
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| 13 | * COPYRIGHT: |
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| 14 | * |
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| 15 | * This file is based on similar code found in newlib available |
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| 16 | * from ftp.cygnus.com. The file which was used had no copyright |
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| 17 | * notice. This file is freely distributable as long as the source |
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| 18 | * of the file is noted. |
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| 19 | * |
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| 20 | * $Id$ |
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| 21 | */ |
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| 22 | |
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| 23 | #ifndef __SPARC_ASM_h |
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| 24 | #define __SPARC_ASM_h |
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| 25 | |
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| 26 | /* |
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| 27 | * Indicate we are in an assembly file and get the basic CPU definitions. |
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| 28 | */ |
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| 29 | |
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| 30 | #define ASM |
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[9700578] | 31 | |
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[b9181082] | 32 | #include <rtems/score/targopts.h> |
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[9700578] | 33 | #include <rtems/score/cpu.h> |
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[c62d36f] | 34 | |
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| 35 | /* |
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| 36 | * Recent versions of GNU cpp define variables which indicate the |
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| 37 | * need for underscores and percents. If not using GNU cpp or |
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| 38 | * the version does not support this, then you will obviously |
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| 39 | * have to define these as appropriate. |
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| 40 | */ |
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| 41 | |
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[9700578] | 42 | /* XXX __USER_LABEL_PREFIX__ and __REGISTER_PREFIX__ do not work on gcc 2.7.0 */ |
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| 43 | /* XXX The following ifdef magic fixes the problem but results in a warning */ |
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| 44 | /* XXX when compiling assembly code. */ |
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[c62d36f] | 45 | #undef __USER_LABEL_PREFIX__ |
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| 46 | #ifndef __USER_LABEL_PREFIX__ |
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| 47 | #define __USER_LABEL_PREFIX__ _ |
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| 48 | #endif |
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| 49 | |
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| 50 | #ifndef __REGISTER_PREFIX__ |
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| 51 | #define __REGISTER_PREFIX__ |
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| 52 | #endif |
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| 53 | |
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| 54 | /* ANSI concatenation macros. */ |
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| 55 | |
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| 56 | #define CONCAT1(a, b) CONCAT2(a, b) |
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| 57 | #define CONCAT2(a, b) a ## b |
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| 58 | |
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| 59 | /* Use the right prefix for global labels. */ |
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| 60 | |
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| 61 | #define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x) |
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| 62 | |
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| 63 | /* Use the right prefix for registers. */ |
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| 64 | |
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| 65 | #define REG(x) CONCAT1 (__REGISTER_PREFIX__, x) |
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| 66 | |
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| 67 | /* |
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| 68 | * define macros for all of the registers on this CPU |
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| 69 | * |
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| 70 | * EXAMPLE: #define d0 REG (d0) |
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| 71 | */ |
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| 72 | |
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| 73 | /* |
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| 74 | * Define macros to handle section beginning and ends. |
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| 75 | */ |
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| 76 | |
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| 77 | |
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| 78 | #define BEGIN_CODE_DCL .text |
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| 79 | #define END_CODE_DCL |
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| 80 | #define BEGIN_DATA_DCL .data |
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| 81 | #define END_DATA_DCL |
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| 82 | #define BEGIN_CODE .text |
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| 83 | #define END_CODE |
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| 84 | #define BEGIN_DATA |
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| 85 | #define END_DATA |
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| 86 | #define BEGIN_BSS |
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| 87 | #define END_BSS |
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| 88 | #define END |
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| 89 | |
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| 90 | /* |
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| 91 | * Following must be tailor for a particular flavor of the C compiler. |
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| 92 | * They may need to put underscores in front of the symbols. |
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| 93 | */ |
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| 94 | |
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| 95 | #define PUBLIC(sym) .globl SYM (sym) |
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| 96 | #define EXTERN(sym) .globl SYM (sym) |
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| 97 | |
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[9700578] | 98 | /* |
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| 99 | * Entry for traps which jump to a programmer-specified trap handler. |
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| 100 | */ |
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| 101 | |
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| 102 | #define TRAP(_vector, _handler) \ |
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| 103 | mov %psr, %l0 ; \ |
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| 104 | sethi %hi(_handler), %l4 ; \ |
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| 105 | jmp %l4+%lo(_handler); \ |
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| 106 | mov _vector, %l3 |
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| 107 | |
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[e1a06d1b] | 108 | /* |
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| 109 | * Used for the reset trap for ERC32 to avoid a supervisor instruction |
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| 110 | */ |
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| 111 | |
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| 112 | #define RTRAP(_vector, _handler) \ |
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| 113 | mov %g0, %l0 ; \ |
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| 114 | sethi %hi(_handler), %l4 ; \ |
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| 115 | jmp %l4+%lo(_handler); \ |
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| 116 | mov _vector, %l3 |
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| 117 | |
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[c62d36f] | 118 | #endif |
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| 119 | /* end of include file */ |
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| 120 | |
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| 121 | |
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