/* * (c) Copyright 2006 Benjamin Herrenschmidt, IBM Corp. * <benh@kernel.crashing.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See * the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #ifndef _ASM_POWERPC_DCR_NATIVE_H #define _ASM_POWERPC_DCR_NATIVE_H #ifdef __KERNEL__ #ifndef __ASSEMBLY__ #include <linux/spinlock.h> typedef struct { unsigned int base; } dcr_host_t; #define DCR_MAP_OK(host) (1) #define dcr_map(dev, dcr_n, dcr_c) ((dcr_host_t){ .base = (dcr_n) }) #define dcr_unmap(host, dcr_c) do {} while (0) #define dcr_read(host, dcr_n) mfdcr(dcr_n + host.base) #define dcr_write(host, dcr_n, value) mtdcr(dcr_n + host.base, value) /* Device Control Registers */ void __mtdcr(int reg, unsigned int val); unsigned int __mfdcr(int reg); #define mfdcr(rn) \ ({unsigned int rval; \ if (__builtin_constant_p(rn)) \ asm volatile("mfdcr %0," __stringify(rn) \ : "=r" (rval)); \ else \ rval = __mfdcr(rn); \ rval;}) #define mtdcr(rn, v) \ do { \ if (__builtin_constant_p(rn)) \ asm volatile("mtdcr " __stringify(rn) ",%0" \ : : "r" (v)); \ else \ __mtdcr(rn, v); \ } while (0) /* R/W of indirect DCRs make use of standard naming conventions for DCRs */ extern spinlock_t dcr_ind_lock; static inline unsigned __mfdcri(int base_addr, int base_data, int reg) { unsigned long flags; unsigned int val; spin_lock_irqsave(&dcr_ind_lock, flags); __mtdcr(base_addr, reg); val = __mfdcr(base_data); spin_unlock_irqrestore(&dcr_ind_lock, flags); return val; } static inline void __mtdcri(int base_addr, int base_data, int reg, unsigned val) { unsigned long flags; spin_lock_irqsave(&dcr_ind_lock, flags); __mtdcr(base_addr, reg); __mtdcr(base_data, val); spin_unlock_irqrestore(&dcr_ind_lock, flags); } #define mfdcri(base, reg) __mfdcri(DCRN_ ## base ## _CONFIG_ADDR, \ DCRN_ ## base ## _CONFIG_DATA, \ reg) #define mtdcri(base, reg, data) __mtdcri(DCRN_ ## base ## _CONFIG_ADDR, \ DCRN_ ## base ## _CONFIG_DATA, \ reg, data) #endif /* __ASSEMBLY__ */ #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_DCR_NATIVE_H */