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 | |
Benjamin Herrenschmidt | 0e6140a | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 25 | #include <linux/spinlock.h> |
| 26 | |
Michael Ellerman | 0b94a1e | 2007-09-17 16:05:00 +1000 | [diff] [blame] | 27 | typedef struct { |
| 28 | unsigned int base; |
| 29 | } dcr_host_t; |
Benjamin Herrenschmidt | 4c75a6f | 2006-11-11 17:24:53 +1100 | [diff] [blame] | 30 | |
| 31 | #define DCR_MAP_OK(host) (1) |
| 32 | |
Michael Ellerman | 0b94a1e | 2007-09-17 16:05:00 +1000 | [diff] [blame] | 33 | #define dcr_map(dev, dcr_n, dcr_c) ((dcr_host_t){ .base = (dcr_n) }) |
Michael Ellerman | cdbd386 | 2007-10-15 19:34:37 +1000 | [diff] [blame] | 34 | #define dcr_unmap(host, dcr_c) do {} while (0) |
Michael Ellerman | 83f34df | 2007-10-15 19:34:36 +1000 | [diff] [blame] | 35 | #define dcr_read(host, dcr_n) mfdcr(dcr_n + host.base) |
| 36 | #define dcr_write(host, dcr_n, value) mtdcr(dcr_n + host.base, value) |
Benjamin Herrenschmidt | 4c75a6f | 2006-11-11 17:24:53 +1100 | [diff] [blame] | 37 | |
Kumar Gala | 45d8e7a | 2006-12-10 23:15:47 -0600 | [diff] [blame] | 38 | /* Device Control Registers */ |
| 39 | void __mtdcr(int reg, unsigned int val); |
| 40 | unsigned int __mfdcr(int reg); |
| 41 | #define mfdcr(rn) \ |
| 42 | ({unsigned int rval; \ |
| 43 | if (__builtin_constant_p(rn)) \ |
| 44 | asm volatile("mfdcr %0," __stringify(rn) \ |
| 45 | : "=r" (rval)); \ |
| 46 | else \ |
| 47 | rval = __mfdcr(rn); \ |
| 48 | rval;}) |
Benjamin Herrenschmidt | 4c75a6f | 2006-11-11 17:24:53 +1100 | [diff] [blame] | 49 | |
Kumar Gala | 45d8e7a | 2006-12-10 23:15:47 -0600 | [diff] [blame] | 50 | #define mtdcr(rn, v) \ |
| 51 | do { \ |
| 52 | if (__builtin_constant_p(rn)) \ |
| 53 | asm volatile("mtdcr " __stringify(rn) ",%0" \ |
| 54 | : : "r" (v)); \ |
| 55 | else \ |
| 56 | __mtdcr(rn, v); \ |
| 57 | } while (0) |
| 58 | |
| 59 | /* R/W of indirect DCRs make use of standard naming conventions for DCRs */ |
Benjamin Herrenschmidt | 0e6140a | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 60 | extern spinlock_t dcr_ind_lock; |
| 61 | |
Valentine Barshak | e8318d9 | 2008-02-06 05:36:49 +1100 | [diff] [blame] | 62 | static inline unsigned __mfdcri(int base_addr, int base_data, int reg) |
| 63 | { |
| 64 | unsigned long flags; |
| 65 | unsigned int val; |
Kumar Gala | 45d8e7a | 2006-12-10 23:15:47 -0600 | [diff] [blame] | 66 | |
Valentine Barshak | e8318d9 | 2008-02-06 05:36:49 +1100 | [diff] [blame] | 67 | spin_lock_irqsave(&dcr_ind_lock, flags); |
| 68 | __mtdcr(base_addr, reg); |
| 69 | val = __mfdcr(base_data); |
| 70 | spin_unlock_irqrestore(&dcr_ind_lock, flags); |
| 71 | return val; |
| 72 | } |
| 73 | |
| 74 | static inline void __mtdcri(int base_addr, int base_data, int reg, |
| 75 | unsigned val) |
| 76 | { |
| 77 | unsigned long flags; |
| 78 | |
| 79 | spin_lock_irqsave(&dcr_ind_lock, flags); |
| 80 | __mtdcr(base_addr, reg); |
| 81 | __mtdcr(base_data, val); |
| 82 | spin_unlock_irqrestore(&dcr_ind_lock, flags); |
| 83 | } |
| 84 | |
| 85 | #define mfdcri(base, reg) __mfdcri(DCRN_ ## base ## _CONFIG_ADDR, \ |
| 86 | DCRN_ ## base ## _CONFIG_DATA, \ |
| 87 | reg) |
| 88 | |
| 89 | #define mtdcri(base, reg, data) __mtdcri(DCRN_ ## base ## _CONFIG_ADDR, \ |
| 90 | DCRN_ ## base ## _CONFIG_DATA, \ |
| 91 | reg, data) |
Kumar Gala | 45d8e7a | 2006-12-10 23:15:47 -0600 | [diff] [blame] | 92 | |
| 93 | #endif /* __ASSEMBLY__ */ |
Benjamin Herrenschmidt | 4c75a6f | 2006-11-11 17:24:53 +1100 | [diff] [blame] | 94 | #endif /* __KERNEL__ */ |
| 95 | #endif /* _ASM_POWERPC_DCR_NATIVE_H */ |