Benjamin Herrenschmidt | 4c75a6f | 2006-11-11 17:24:53 +1100 | [diff] [blame] | 1 | /* |
| 2 | * (c) Copyright 2006 Benjamin Herrenschmidt, IBM Corp. |
| 3 | * <benh@kernel.crashing.org> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 13 | * the GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | */ |
| 19 | |
| 20 | #ifndef _ASM_POWERPC_DCR_NATIVE_H |
| 21 | #define _ASM_POWERPC_DCR_NATIVE_H |
| 22 | #ifdef __KERNEL__ |
Kumar Gala | 45d8e7a | 2006-12-10 23:15:47 -0600 | [diff] [blame] | 23 | #ifndef __ASSEMBLY__ |
Benjamin Herrenschmidt | 4c75a6f | 2006-11-11 17:24:53 +1100 | [diff] [blame] | 24 | |
| 25 | typedef struct {} dcr_host_t; |
| 26 | |
| 27 | #define DCR_MAP_OK(host) (1) |
| 28 | |
David Gibson | c91ef59 | 2007-02-15 14:38:04 +1100 | [diff] [blame] | 29 | #define dcr_map(dev, dcr_n, dcr_c) ((dcr_host_t){}) |
| 30 | #define dcr_unmap(host, dcr_n, dcr_c) do {} while (0) |
Benjamin Herrenschmidt | 4c75a6f | 2006-11-11 17:24:53 +1100 | [diff] [blame] | 31 | #define dcr_read(host, dcr_n) mfdcr(dcr_n) |
| 32 | #define dcr_write(host, dcr_n, value) mtdcr(dcr_n, value) |
| 33 | |
Kumar Gala | 45d8e7a | 2006-12-10 23:15:47 -0600 | [diff] [blame] | 34 | /* Device Control Registers */ |
| 35 | void __mtdcr(int reg, unsigned int val); |
| 36 | unsigned int __mfdcr(int reg); |
| 37 | #define mfdcr(rn) \ |
| 38 | ({unsigned int rval; \ |
| 39 | if (__builtin_constant_p(rn)) \ |
| 40 | asm volatile("mfdcr %0," __stringify(rn) \ |
| 41 | : "=r" (rval)); \ |
| 42 | else \ |
| 43 | rval = __mfdcr(rn); \ |
| 44 | rval;}) |
Benjamin Herrenschmidt | 4c75a6f | 2006-11-11 17:24:53 +1100 | [diff] [blame] | 45 | |
Kumar Gala | 45d8e7a | 2006-12-10 23:15:47 -0600 | [diff] [blame] | 46 | #define mtdcr(rn, v) \ |
| 47 | do { \ |
| 48 | if (__builtin_constant_p(rn)) \ |
| 49 | asm volatile("mtdcr " __stringify(rn) ",%0" \ |
| 50 | : : "r" (v)); \ |
| 51 | else \ |
| 52 | __mtdcr(rn, v); \ |
| 53 | } while (0) |
| 54 | |
| 55 | /* R/W of indirect DCRs make use of standard naming conventions for DCRs */ |
| 56 | #define mfdcri(base, reg) \ |
| 57 | ({ \ |
| 58 | mtdcr(base ## _CFGADDR, base ## _ ## reg); \ |
| 59 | mfdcr(base ## _CFGDATA); \ |
| 60 | }) |
| 61 | |
| 62 | #define mtdcri(base, reg, data) \ |
| 63 | do { \ |
| 64 | mtdcr(base ## _CFGADDR, base ## _ ## reg); \ |
| 65 | mtdcr(base ## _CFGDATA, data); \ |
| 66 | } while (0) |
| 67 | |
| 68 | #endif /* __ASSEMBLY__ */ |
Benjamin Herrenschmidt | 4c75a6f | 2006-11-11 17:24:53 +1100 | [diff] [blame] | 69 | #endif /* __KERNEL__ */ |
| 70 | #endif /* _ASM_POWERPC_DCR_NATIVE_H */ |
| 71 | |
| 72 | |