| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/include/asm-arm/assembler.h |
| 3 | * |
| 4 | * Copyright (C) 1996-2000 Russell King |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | * |
| 10 | * This file contains arm architecture specific defines |
| 11 | * for the different processors. |
| 12 | * |
| 13 | * Do not include any C declarations in this file - it is included by |
| 14 | * assembler source. |
| 15 | */ |
| 16 | #ifndef __ASSEMBLY__ |
| 17 | #error "Only include this from assembly code" |
| 18 | #endif |
| 19 | |
| 20 | #include <asm/ptrace.h> |
| 21 | |
| 22 | /* |
| 23 | * Endian independent macros for shifting bytes within registers. |
| 24 | */ |
| 25 | #ifndef __ARMEB__ |
| 26 | #define pull lsr |
| 27 | #define push lsl |
| 28 | #define get_byte_0 lsl #0 |
| 29 | #define get_byte_1 lsr #8 |
| 30 | #define get_byte_2 lsr #16 |
| 31 | #define get_byte_3 lsr #24 |
| 32 | #define put_byte_0 lsl #0 |
| 33 | #define put_byte_1 lsl #8 |
| 34 | #define put_byte_2 lsl #16 |
| 35 | #define put_byte_3 lsl #24 |
| 36 | #else |
| 37 | #define pull lsl |
| 38 | #define push lsr |
| 39 | #define get_byte_0 lsr #24 |
| 40 | #define get_byte_1 lsr #16 |
| 41 | #define get_byte_2 lsr #8 |
| 42 | #define get_byte_3 lsl #0 |
| 43 | #define put_byte_0 lsl #24 |
| 44 | #define put_byte_1 lsl #16 |
| 45 | #define put_byte_2 lsl #8 |
| 46 | #define put_byte_3 lsl #0 |
| 47 | #endif |
| 48 | |
| 49 | /* |
| 50 | * Data preload for architectures that support it |
| 51 | */ |
| 52 | #if __LINUX_ARM_ARCH__ >= 5 |
| 53 | #define PLD(code...) code |
| 54 | #else |
| 55 | #define PLD(code...) |
| 56 | #endif |
| 57 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | /* |
| Russell King | 9c42954 | 2006-03-23 16:59:37 +0000 | [diff] [blame] | 59 | * Enable and disable interrupts |
| 60 | */ |
| 61 | #if __LINUX_ARM_ARCH__ >= 6 |
| 62 | .macro disable_irq |
| 63 | cpsid i |
| 64 | .endm |
| 65 | |
| 66 | .macro enable_irq |
| 67 | cpsie i |
| 68 | .endm |
| 69 | #else |
| 70 | .macro disable_irq |
| 71 | msr cpsr_c, #PSR_I_BIT | SVC_MODE |
| 72 | .endm |
| 73 | |
| 74 | .macro enable_irq |
| 75 | msr cpsr_c, #SVC_MODE |
| 76 | .endm |
| 77 | #endif |
| 78 | |
| 79 | /* |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | * Save the current IRQ state and disable IRQs. Note that this macro |
| 81 | * assumes FIQs are enabled, and that the processor is in SVC mode. |
| 82 | */ |
| Russell King | 59d1ff3 | 2005-11-09 15:04:22 +0000 | [diff] [blame] | 83 | .macro save_and_disable_irqs, oldcpsr |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | mrs \oldcpsr, cpsr |
| Russell King | 9c42954 | 2006-03-23 16:59:37 +0000 | [diff] [blame] | 85 | disable_irq |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | .endm |
| 87 | |
| 88 | /* |
| 89 | * Restore interrupt state previously stored in a register. We don't |
| 90 | * guarantee that this will preserve the flags. |
| 91 | */ |
| 92 | .macro restore_irqs, oldcpsr |
| 93 | msr cpsr_c, \oldcpsr |
| 94 | .endm |
| 95 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | #define USER(x...) \ |
| 97 | 9999: x; \ |
| 98 | .section __ex_table,"a"; \ |
| 99 | .align 3; \ |
| 100 | .long 9999b,9001f; \ |
| 101 | .previous |