David Howells | 6a846f3 | 2012-03-28 18:30:02 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Port on Texas Instruments TMS320C6x architecture |
| 3 | * |
| 4 | * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated |
| 5 | * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | #ifndef _ASM_C6X_SPECIAL_INSNS_H |
| 12 | #define _ASM_C6X_SPECIAL_INSNS_H |
| 13 | |
| 14 | |
| 15 | #define get_creg(reg) \ |
| 16 | ({ unsigned int __x; \ |
| 17 | asm volatile ("mvc .s2 " #reg ",%0\n" : "=b"(__x)); __x; }) |
| 18 | |
| 19 | #define set_creg(reg, v) \ |
| 20 | do { unsigned int __x = (unsigned int)(v); \ |
| 21 | asm volatile ("mvc .s2 %0," #reg "\n" : : "b"(__x)); \ |
| 22 | } while (0) |
| 23 | |
| 24 | #define or_creg(reg, n) \ |
| 25 | do { unsigned __x, __n = (unsigned)(n); \ |
| 26 | asm volatile ("mvc .s2 " #reg ",%0\n" \ |
| 27 | "or .l2 %1,%0,%0\n" \ |
| 28 | "mvc .s2 %0," #reg "\n" \ |
| 29 | "nop\n" \ |
| 30 | : "=&b"(__x) : "b"(__n)); \ |
| 31 | } while (0) |
| 32 | |
| 33 | #define and_creg(reg, n) \ |
| 34 | do { unsigned __x, __n = (unsigned)(n); \ |
| 35 | asm volatile ("mvc .s2 " #reg ",%0\n" \ |
| 36 | "and .l2 %1,%0,%0\n" \ |
| 37 | "mvc .s2 %0," #reg "\n" \ |
| 38 | "nop\n" \ |
| 39 | : "=&b"(__x) : "b"(__n)); \ |
| 40 | } while (0) |
| 41 | |
| 42 | #define get_coreid() (get_creg(DNUM) & 0xff) |
| 43 | |
| 44 | /* Set/get IST */ |
| 45 | #define set_ist(x) set_creg(ISTP, x) |
| 46 | #define get_ist() get_creg(ISTP) |
| 47 | |
| 48 | /* |
| 49 | * Exception management |
| 50 | */ |
| 51 | #define disable_exception() |
| 52 | #define get_except_type() get_creg(EFR) |
| 53 | #define ack_exception(type) set_creg(ECR, 1 << (type)) |
| 54 | #define get_iexcept() get_creg(IERR) |
| 55 | #define set_iexcept(mask) set_creg(IERR, (mask)) |
| 56 | |
| 57 | #define _extu(x, s, e) \ |
| 58 | ({ unsigned int __x; \ |
| 59 | asm volatile ("extu .S2 %3,%1,%2,%0\n" : \ |
| 60 | "=b"(__x) : "n"(s), "n"(e), "b"(x)); \ |
| 61 | __x; }) |
| 62 | |
| 63 | #endif /* _ASM_C6X_SPECIAL_INSNS_H */ |