681 lines
16 KiB
C
681 lines
16 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ALPHA_IO_H
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#define __ALPHA_IO_H
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#ifdef __KERNEL__
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <asm/compiler.h>
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#include <asm/machvec.h>
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#include <asm/hwrpb.h>
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/* The generic header contains only prototypes. Including it ensures that
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the implementation we have here matches that interface. */
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#include <asm-generic/iomap.h>
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/*
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* Virtual -> physical identity mapping starts at this offset
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*/
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#ifdef USE_48_BIT_KSEG
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#define IDENT_ADDR 0xffff800000000000UL
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#else
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#define IDENT_ADDR 0xfffffc0000000000UL
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#endif
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/*
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* We try to avoid hae updates (thus the cache), but when we
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* do need to update the hae, we need to do it atomically, so
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* that any interrupts wouldn't get confused with the hae
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* register not being up-to-date with respect to the hardware
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* value.
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*/
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extern inline void __set_hae(unsigned long new_hae)
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{
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unsigned long flags = swpipl(IPL_MAX);
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barrier();
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alpha_mv.hae_cache = new_hae;
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*alpha_mv.hae_register = new_hae;
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mb();
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/* Re-read to make sure it was written. */
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new_hae = *alpha_mv.hae_register;
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setipl(flags);
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barrier();
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}
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extern inline void set_hae(unsigned long new_hae)
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{
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if (new_hae != alpha_mv.hae_cache)
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__set_hae(new_hae);
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}
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/*
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* Change virtual addresses to physical addresses and vv.
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*/
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#ifdef USE_48_BIT_KSEG
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static inline unsigned long virt_to_phys(volatile void *address)
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{
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return (unsigned long)address - IDENT_ADDR;
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}
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static inline void * phys_to_virt(unsigned long address)
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{
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return (void *) (address + IDENT_ADDR);
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}
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#else
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static inline unsigned long virt_to_phys(volatile void *address)
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{
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unsigned long phys = (unsigned long)address;
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/* Sign-extend from bit 41. */
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phys <<= (64 - 41);
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phys = (long)phys >> (64 - 41);
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/* Crop to the physical address width of the processor. */
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phys &= (1ul << hwrpb->pa_bits) - 1;
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return phys;
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}
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static inline void * phys_to_virt(unsigned long address)
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{
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return (void *)(IDENT_ADDR + (address & ((1ul << 41) - 1)));
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}
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#endif
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#define virt_to_phys virt_to_phys
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#define phys_to_virt phys_to_virt
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#define page_to_phys(page) page_to_pa(page)
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/* Maximum PIO space address supported? */
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#define IO_SPACE_LIMIT 0xffff
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/*
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* Change addresses as seen by the kernel (virtual) to addresses as
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* seen by a device (bus), and vice versa.
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*
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* Note that this only works for a limited range of kernel addresses,
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* and very well may not span all memory. Consider this interface
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* deprecated in favour of the DMA-mapping API.
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*/
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extern unsigned long __direct_map_base;
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extern unsigned long __direct_map_size;
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static inline unsigned long __deprecated isa_virt_to_bus(volatile void *address)
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{
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unsigned long phys = virt_to_phys(address);
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unsigned long bus = phys + __direct_map_base;
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return phys <= __direct_map_size ? bus : 0;
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}
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#define isa_virt_to_bus isa_virt_to_bus
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static inline void * __deprecated isa_bus_to_virt(unsigned long address)
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{
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void *virt;
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/* This check is a sanity check but also ensures that bus address 0
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maps to virtual address 0 which is useful to detect null pointers
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(the NCR driver is much simpler if NULL pointers are preserved). */
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address -= __direct_map_base;
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virt = phys_to_virt(address);
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return (long)address <= 0 ? NULL : virt;
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}
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#define isa_bus_to_virt isa_bus_to_virt
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/*
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* There are different chipsets to interface the Alpha CPUs to the world.
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*/
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#define IO_CONCAT(a,b) _IO_CONCAT(a,b)
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#define _IO_CONCAT(a,b) a ## _ ## b
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#ifdef CONFIG_ALPHA_GENERIC
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/* In a generic kernel, we always go through the machine vector. */
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#define REMAP1(TYPE, NAME, QUAL) \
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static inline TYPE generic_##NAME(QUAL void __iomem *addr) \
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{ \
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return alpha_mv.mv_##NAME(addr); \
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}
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#define REMAP2(TYPE, NAME, QUAL) \
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static inline void generic_##NAME(TYPE b, QUAL void __iomem *addr) \
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{ \
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alpha_mv.mv_##NAME(b, addr); \
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}
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REMAP1(unsigned int, ioread8, const)
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REMAP1(unsigned int, ioread16, const)
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REMAP1(unsigned int, ioread32, const)
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REMAP1(u64, ioread64, const)
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REMAP1(u8, readb, const volatile)
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REMAP1(u16, readw, const volatile)
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REMAP1(u32, readl, const volatile)
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REMAP1(u64, readq, const volatile)
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REMAP2(u8, iowrite8, /**/)
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REMAP2(u16, iowrite16, /**/)
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REMAP2(u32, iowrite32, /**/)
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REMAP2(u64, iowrite64, /**/)
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REMAP2(u8, writeb, volatile)
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REMAP2(u16, writew, volatile)
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REMAP2(u32, writel, volatile)
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REMAP2(u64, writeq, volatile)
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#undef REMAP1
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#undef REMAP2
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extern inline void __iomem *generic_ioportmap(unsigned long a)
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{
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return alpha_mv.mv_ioportmap(a);
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}
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static inline void __iomem *generic_ioremap(unsigned long a, unsigned long s)
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{
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return alpha_mv.mv_ioremap(a, s);
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}
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static inline void generic_iounmap(volatile void __iomem *a)
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{
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return alpha_mv.mv_iounmap(a);
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}
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static inline int generic_is_ioaddr(unsigned long a)
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{
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return alpha_mv.mv_is_ioaddr(a);
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}
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static inline int generic_is_mmio(const volatile void __iomem *a)
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{
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return alpha_mv.mv_is_mmio(a);
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}
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#define __IO_PREFIX generic
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#define generic_trivial_rw_bw 0
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#define generic_trivial_rw_lq 0
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#define generic_trivial_io_bw 0
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#define generic_trivial_io_lq 0
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#define generic_trivial_iounmap 0
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#else
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#if defined(CONFIG_ALPHA_APECS)
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# include <asm/core_apecs.h>
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#elif defined(CONFIG_ALPHA_CIA)
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# include <asm/core_cia.h>
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#elif defined(CONFIG_ALPHA_IRONGATE)
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# include <asm/core_irongate.h>
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#elif defined(CONFIG_ALPHA_JENSEN)
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# include <asm/jensen.h>
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#elif defined(CONFIG_ALPHA_LCA)
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# include <asm/core_lca.h>
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#elif defined(CONFIG_ALPHA_MARVEL)
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# include <asm/core_marvel.h>
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#elif defined(CONFIG_ALPHA_MCPCIA)
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# include <asm/core_mcpcia.h>
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#elif defined(CONFIG_ALPHA_POLARIS)
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# include <asm/core_polaris.h>
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#elif defined(CONFIG_ALPHA_T2)
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# include <asm/core_t2.h>
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#elif defined(CONFIG_ALPHA_TSUNAMI)
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# include <asm/core_tsunami.h>
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#elif defined(CONFIG_ALPHA_TITAN)
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# include <asm/core_titan.h>
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#elif defined(CONFIG_ALPHA_WILDFIRE)
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# include <asm/core_wildfire.h>
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#else
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#error "What system is this?"
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#endif
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#endif /* GENERIC */
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/*
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* We always have external versions of these routines.
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*/
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extern u8 inb(unsigned long port);
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extern u16 inw(unsigned long port);
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extern u32 inl(unsigned long port);
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extern void outb(u8 b, unsigned long port);
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extern void outw(u16 b, unsigned long port);
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extern void outl(u32 b, unsigned long port);
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#define inb inb
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#define inw inw
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#define inl inl
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#define outb outb
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#define outw outw
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#define outl outl
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extern u8 readb(const volatile void __iomem *addr);
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extern u16 readw(const volatile void __iomem *addr);
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extern u32 readl(const volatile void __iomem *addr);
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extern u64 readq(const volatile void __iomem *addr);
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extern void writeb(u8 b, volatile void __iomem *addr);
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extern void writew(u16 b, volatile void __iomem *addr);
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extern void writel(u32 b, volatile void __iomem *addr);
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extern void writeq(u64 b, volatile void __iomem *addr);
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#define readb readb
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#define readw readw
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#define readl readl
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#define readq readq
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#define writeb writeb
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#define writew writew
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#define writel writel
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#define writeq writeq
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extern u8 __raw_readb(const volatile void __iomem *addr);
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extern u16 __raw_readw(const volatile void __iomem *addr);
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extern u32 __raw_readl(const volatile void __iomem *addr);
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extern u64 __raw_readq(const volatile void __iomem *addr);
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extern void __raw_writeb(u8 b, volatile void __iomem *addr);
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extern void __raw_writew(u16 b, volatile void __iomem *addr);
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extern void __raw_writel(u32 b, volatile void __iomem *addr);
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extern void __raw_writeq(u64 b, volatile void __iomem *addr);
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#define __raw_readb __raw_readb
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#define __raw_readw __raw_readw
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#define __raw_readl __raw_readl
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#define __raw_readq __raw_readq
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#define __raw_writeb __raw_writeb
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#define __raw_writew __raw_writew
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#define __raw_writel __raw_writel
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#define __raw_writeq __raw_writeq
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/*
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* Mapping from port numbers to __iomem space is pretty easy.
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*/
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/* These two have to be extern inline because of the extern prototype from
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<asm-generic/iomap.h>. It is not legal to mix "extern" and "static" for
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the same declaration. */
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extern inline void __iomem *ioport_map(unsigned long port, unsigned int size)
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{
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return IO_CONCAT(__IO_PREFIX,ioportmap) (port);
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}
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extern inline void ioport_unmap(void __iomem *addr)
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{
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}
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#define ioport_map ioport_map
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#define ioport_unmap ioport_unmap
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static inline void __iomem *ioremap(unsigned long port, unsigned long size)
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{
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return IO_CONCAT(__IO_PREFIX,ioremap) (port, size);
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}
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#define ioremap_wc ioremap
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#define ioremap_uc ioremap
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static inline void iounmap(volatile void __iomem *addr)
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{
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IO_CONCAT(__IO_PREFIX,iounmap)(addr);
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}
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static inline int __is_ioaddr(unsigned long addr)
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{
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return IO_CONCAT(__IO_PREFIX,is_ioaddr)(addr);
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}
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#define __is_ioaddr(a) __is_ioaddr((unsigned long)(a))
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static inline int __is_mmio(const volatile void __iomem *addr)
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{
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return IO_CONCAT(__IO_PREFIX,is_mmio)(addr);
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}
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/*
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* If the actual I/O bits are sufficiently trivial, then expand inline.
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*/
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#if IO_CONCAT(__IO_PREFIX,trivial_io_bw)
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extern inline unsigned int ioread8(const void __iomem *addr)
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{
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unsigned int ret;
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mb();
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ret = IO_CONCAT(__IO_PREFIX,ioread8)(addr);
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mb();
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return ret;
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}
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extern inline unsigned int ioread16(const void __iomem *addr)
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{
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unsigned int ret;
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mb();
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ret = IO_CONCAT(__IO_PREFIX,ioread16)(addr);
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mb();
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return ret;
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}
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extern inline void iowrite8(u8 b, void __iomem *addr)
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{
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mb();
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IO_CONCAT(__IO_PREFIX, iowrite8)(b, addr);
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}
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extern inline void iowrite16(u16 b, void __iomem *addr)
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{
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mb();
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IO_CONCAT(__IO_PREFIX, iowrite16)(b, addr);
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}
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extern inline u8 inb(unsigned long port)
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{
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return ioread8(ioport_map(port, 1));
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}
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extern inline u16 inw(unsigned long port)
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{
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return ioread16(ioport_map(port, 2));
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}
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extern inline void outb(u8 b, unsigned long port)
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{
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iowrite8(b, ioport_map(port, 1));
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}
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extern inline void outw(u16 b, unsigned long port)
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{
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iowrite16(b, ioport_map(port, 2));
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}
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#endif
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#define ioread8 ioread8
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#define ioread16 ioread16
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#define iowrite8 iowrite8
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#define iowrite16 iowrite16
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#if IO_CONCAT(__IO_PREFIX,trivial_io_lq)
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extern inline unsigned int ioread32(const void __iomem *addr)
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{
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unsigned int ret;
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mb();
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ret = IO_CONCAT(__IO_PREFIX,ioread32)(addr);
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mb();
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return ret;
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}
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extern inline u64 ioread64(const void __iomem *addr)
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{
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unsigned int ret;
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mb();
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ret = IO_CONCAT(__IO_PREFIX,ioread64)(addr);
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mb();
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return ret;
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}
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extern inline void iowrite32(u32 b, void __iomem *addr)
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{
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mb();
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IO_CONCAT(__IO_PREFIX, iowrite32)(b, addr);
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}
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extern inline void iowrite64(u64 b, void __iomem *addr)
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{
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mb();
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IO_CONCAT(__IO_PREFIX, iowrite64)(b, addr);
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}
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extern inline u32 inl(unsigned long port)
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{
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return ioread32(ioport_map(port, 4));
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}
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extern inline void outl(u32 b, unsigned long port)
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{
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iowrite32(b, ioport_map(port, 4));
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}
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#endif
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#define ioread32 ioread32
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#define ioread64 ioread64
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#define iowrite32 iowrite32
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#define iowrite64 iowrite64
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#if IO_CONCAT(__IO_PREFIX,trivial_rw_bw) == 1
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extern inline u8 __raw_readb(const volatile void __iomem *addr)
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{
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return IO_CONCAT(__IO_PREFIX,readb)(addr);
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}
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extern inline u16 __raw_readw(const volatile void __iomem *addr)
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{
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return IO_CONCAT(__IO_PREFIX,readw)(addr);
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}
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extern inline void __raw_writeb(u8 b, volatile void __iomem *addr)
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{
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IO_CONCAT(__IO_PREFIX,writeb)(b, addr);
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}
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extern inline void __raw_writew(u16 b, volatile void __iomem *addr)
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{
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IO_CONCAT(__IO_PREFIX,writew)(b, addr);
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}
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extern inline u8 readb(const volatile void __iomem *addr)
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{
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u8 ret;
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mb();
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ret = __raw_readb(addr);
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mb();
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return ret;
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}
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extern inline u16 readw(const volatile void __iomem *addr)
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{
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u16 ret;
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mb();
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ret = __raw_readw(addr);
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mb();
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return ret;
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}
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extern inline void writeb(u8 b, volatile void __iomem *addr)
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{
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mb();
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__raw_writeb(b, addr);
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}
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extern inline void writew(u16 b, volatile void __iomem *addr)
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{
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mb();
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__raw_writew(b, addr);
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}
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#endif
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#if IO_CONCAT(__IO_PREFIX,trivial_rw_lq) == 1
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extern inline u32 __raw_readl(const volatile void __iomem *addr)
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{
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return IO_CONCAT(__IO_PREFIX,readl)(addr);
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}
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extern inline u64 __raw_readq(const volatile void __iomem *addr)
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{
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return IO_CONCAT(__IO_PREFIX,readq)(addr);
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}
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extern inline void __raw_writel(u32 b, volatile void __iomem *addr)
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{
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IO_CONCAT(__IO_PREFIX,writel)(b, addr);
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}
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extern inline void __raw_writeq(u64 b, volatile void __iomem *addr)
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{
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IO_CONCAT(__IO_PREFIX,writeq)(b, addr);
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}
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extern inline u32 readl(const volatile void __iomem *addr)
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{
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u32 ret;
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mb();
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ret = __raw_readl(addr);
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mb();
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return ret;
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}
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extern inline u64 readq(const volatile void __iomem *addr)
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{
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u64 ret;
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mb();
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ret = __raw_readq(addr);
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mb();
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return ret;
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}
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extern inline void writel(u32 b, volatile void __iomem *addr)
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{
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mb();
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__raw_writel(b, addr);
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}
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extern inline void writeq(u64 b, volatile void __iomem *addr)
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{
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mb();
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|
__raw_writeq(b, addr);
|
|
}
|
|
#endif
|
|
|
|
#define ioread16be(p) swab16(ioread16(p))
|
|
#define ioread32be(p) swab32(ioread32(p))
|
|
#define iowrite16be(v,p) iowrite16(swab16(v), (p))
|
|
#define iowrite32be(v,p) iowrite32(swab32(v), (p))
|
|
|
|
#define inb_p inb
|
|
#define inw_p inw
|
|
#define inl_p inl
|
|
#define outb_p outb
|
|
#define outw_p outw
|
|
#define outl_p outl
|
|
|
|
extern u8 readb_relaxed(const volatile void __iomem *addr);
|
|
extern u16 readw_relaxed(const volatile void __iomem *addr);
|
|
extern u32 readl_relaxed(const volatile void __iomem *addr);
|
|
extern u64 readq_relaxed(const volatile void __iomem *addr);
|
|
#define readb_relaxed readb_relaxed
|
|
#define readw_relaxed readw_relaxed
|
|
#define readl_relaxed readl_relaxed
|
|
#define readq_relaxed readq_relaxed
|
|
|
|
#if IO_CONCAT(__IO_PREFIX,trivial_io_bw)
|
|
extern inline u8 readb_relaxed(const volatile void __iomem *addr)
|
|
{
|
|
mb();
|
|
return __raw_readb(addr);
|
|
}
|
|
|
|
extern inline u16 readw_relaxed(const volatile void __iomem *addr)
|
|
{
|
|
mb();
|
|
return __raw_readw(addr);
|
|
}
|
|
#endif
|
|
|
|
#if IO_CONCAT(__IO_PREFIX,trivial_io_lq)
|
|
extern inline u32 readl_relaxed(const volatile void __iomem *addr)
|
|
{
|
|
mb();
|
|
return __raw_readl(addr);
|
|
}
|
|
|
|
extern inline u64 readq_relaxed(const volatile void __iomem *addr)
|
|
{
|
|
mb();
|
|
return __raw_readq(addr);
|
|
}
|
|
#endif
|
|
|
|
#define writeb_relaxed writeb
|
|
#define writew_relaxed writew
|
|
#define writel_relaxed writel
|
|
#define writeq_relaxed writeq
|
|
|
|
/*
|
|
* String version of IO memory access ops:
|
|
*/
|
|
extern void memcpy_fromio(void *, const volatile void __iomem *, long);
|
|
extern void memcpy_toio(volatile void __iomem *, const void *, long);
|
|
extern void _memset_c_io(volatile void __iomem *, unsigned long, long);
|
|
|
|
static inline void memset_io(volatile void __iomem *addr, u8 c, long len)
|
|
{
|
|
_memset_c_io(addr, 0x0101010101010101UL * c, len);
|
|
}
|
|
|
|
#define __HAVE_ARCH_MEMSETW_IO
|
|
static inline void memsetw_io(volatile void __iomem *addr, u16 c, long len)
|
|
{
|
|
_memset_c_io(addr, 0x0001000100010001UL * c, len);
|
|
}
|
|
|
|
#define memset_io memset_io
|
|
#define memcpy_fromio memcpy_fromio
|
|
#define memcpy_toio memcpy_toio
|
|
|
|
/*
|
|
* String versions of in/out ops:
|
|
*/
|
|
extern void insb (unsigned long port, void *dst, unsigned long count);
|
|
extern void insw (unsigned long port, void *dst, unsigned long count);
|
|
extern void insl (unsigned long port, void *dst, unsigned long count);
|
|
extern void outsb (unsigned long port, const void *src, unsigned long count);
|
|
extern void outsw (unsigned long port, const void *src, unsigned long count);
|
|
extern void outsl (unsigned long port, const void *src, unsigned long count);
|
|
|
|
#define insb insb
|
|
#define insw insw
|
|
#define insl insl
|
|
#define outsb outsb
|
|
#define outsw outsw
|
|
#define outsl outsl
|
|
|
|
/*
|
|
* The Alpha Jensen hardware for some rather strange reason puts
|
|
* the RTC clock at 0x170 instead of 0x70. Probably due to some
|
|
* misguided idea about using 0x70 for NMI stuff.
|
|
*
|
|
* These defines will override the defaults when doing RTC queries
|
|
*/
|
|
|
|
#ifdef CONFIG_ALPHA_GENERIC
|
|
# define RTC_PORT(x) ((x) + alpha_mv.rtc_port)
|
|
#else
|
|
# ifdef CONFIG_ALPHA_JENSEN
|
|
# define RTC_PORT(x) (0x170+(x))
|
|
# else
|
|
# define RTC_PORT(x) (0x70 + (x))
|
|
# endif
|
|
#endif
|
|
#define RTC_ALWAYS_BCD 0
|
|
|
|
/*
|
|
* Convert a physical pointer to a virtual kernel pointer for /dev/mem
|
|
* access
|
|
*/
|
|
#define xlate_dev_mem_ptr(p) __va(p)
|
|
|
|
/*
|
|
* These get provided from <asm-generic/iomap.h> since alpha does not
|
|
* select GENERIC_IOMAP.
|
|
*/
|
|
#define ioread64 ioread64
|
|
#define iowrite64 iowrite64
|
|
#define ioread64be ioread64be
|
|
#define iowrite64be iowrite64be
|
|
#define ioread8_rep ioread8_rep
|
|
#define ioread16_rep ioread16_rep
|
|
#define ioread32_rep ioread32_rep
|
|
#define iowrite8_rep iowrite8_rep
|
|
#define iowrite16_rep iowrite16_rep
|
|
#define iowrite32_rep iowrite32_rep
|
|
#define pci_iounmap pci_iounmap
|
|
|
|
#include <asm-generic/io.h>
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* __ALPHA_IO_H */
|