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Diffstat (limited to 'arch/mips/include/asm/netlogic/haldefs.h')
| -rw-r--r-- | arch/mips/include/asm/netlogic/haldefs.h | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/arch/mips/include/asm/netlogic/haldefs.h b/arch/mips/include/asm/netlogic/haldefs.h new file mode 100644 index 000000000..79c7cccdc --- /dev/null +++ b/arch/mips/include/asm/netlogic/haldefs.h @@ -0,0 +1,171 @@ +/* + * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights + * reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the NetLogic + * license below: + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE + * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN + * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef __NLM_HAL_HALDEFS_H__ +#define __NLM_HAL_HALDEFS_H__ + +#include <linux/irqflags.h> /* for local_irq_disable */ + +/* + * This file contains platform specific memory mapped IO implementation + * and will provide a way to read 32/64 bit memory mapped registers in + * all ABIs + */ +static inline uint32_t +nlm_read_reg(uint64_t base, uint32_t reg) +{ + volatile uint32_t *addr = (volatile uint32_t *)(long)base + reg; + + return *addr; +} + +static inline void +nlm_write_reg(uint64_t base, uint32_t reg, uint32_t val) +{ + volatile uint32_t *addr = (volatile uint32_t *)(long)base + reg; + + *addr = val; +} + +/* + * For o32 compilation, we have to disable interrupts to access 64 bit + * registers + * + * We need to disable interrupts because we save just the lower 32 bits of + * registers in interrupt handling. So if we get hit by an interrupt while + * using the upper 32 bits of a register, we lose. + */ + +static inline uint64_t +nlm_read_reg64(uint64_t base, uint32_t reg) +{ + uint64_t addr = base + (reg >> 1) * sizeof(uint64_t); + volatile uint64_t *ptr = (volatile uint64_t *)(long)addr; + uint64_t val; + + if (sizeof(unsigned long) == 4) { + unsigned long flags; + + local_irq_save(flags); + __asm__ __volatile__( + ".set push" "\n\t" + ".set mips64" "\n\t" + "ld %L0, %1" "\n\t" + "dsra32 %M0, %L0, 0" "\n\t" + "sll %L0, %L0, 0" "\n\t" + ".set pop" "\n" + : "=r" (val) + : "m" (*ptr)); + local_irq_restore(flags); + } else + val = *ptr; + + return val; +} + +static inline void +nlm_write_reg64(uint64_t base, uint32_t reg, uint64_t val) +{ + uint64_t addr = base + (reg >> 1) * sizeof(uint64_t); + volatile uint64_t *ptr = (volatile uint64_t *)(long)addr; + + if (sizeof(unsigned long) == 4) { + unsigned long flags; + uint64_t tmp; + + local_irq_save(flags); + __asm__ __volatile__( + ".set push" "\n\t" + ".set mips64" "\n\t" + "dsll32 %L0, %L0, 0" "\n\t" + "dsrl32 %L0, %L0, 0" "\n\t" + "dsll32 %M0, %M0, 0" "\n\t" + "or %L0, %L0, %M0" "\n\t" + "sd %L0, %2" "\n\t" + ".set pop" "\n" + : "=r" (tmp) + : "0" (val), "m" (*ptr)); + local_irq_restore(flags); + } else + *ptr = val; +} + +/* + * Routines to store 32/64 bit values to 64 bit addresses, + * used when going thru XKPHYS to access registers + */ +static inline uint32_t +nlm_read_reg_xkphys(uint64_t base, uint32_t reg) +{ + return nlm_read_reg(base, reg); +} + +static inline void +nlm_write_reg_xkphys(uint64_t base, uint32_t reg, uint32_t val) +{ + nlm_write_reg(base, reg, val); +} + +static inline uint64_t +nlm_read_reg64_xkphys(uint64_t base, uint32_t reg) +{ + return nlm_read_reg64(base, reg); +} + +static inline void +nlm_write_reg64_xkphys(uint64_t base, uint32_t reg, uint64_t val) +{ + nlm_write_reg64(base, reg, val); +} + +/* Location where IO base is mapped */ +extern uint64_t nlm_io_base; + +#if defined(CONFIG_CPU_XLP) +static inline uint64_t +nlm_pcicfg_base(uint32_t devoffset) +{ + return nlm_io_base + devoffset; +} + +#elif defined(CONFIG_CPU_XLR) + +static inline uint64_t +nlm_mmio_base(uint32_t devoffset) +{ + return nlm_io_base + devoffset; +} +#endif + +#endif |