arch/sh/include/asm/io.h
Source file repositories/reference/linux-study-clean/arch/sh/include/asm/io.h
File Facts
- System
- Linux kernel
- Corpus path
arch/sh/include/asm/io.h- Extension
.h- Size
- 8623 bytes
- Lines
- 292
- Domain
- Architecture Layer
- Bucket
- arch/sh
- Inferred role
- Architecture Layer: implementation source
- Status
- source implementation candidate
Why This File Exists
CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
- CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
Dependency Surface
linux/errno.hasm/cache.hasm/addrspace.hasm/machvec.hasm/page.hlinux/pgtable.hasm/io_generic.hasm-generic/pci_iomap.hmach/mangle-port.hasm/io_noioport.hasm-generic/io.h
Detected Declarations
function __set_io_port_base
Annotated Snippet
#ifndef __ASM_SH_IO_H
#define __ASM_SH_IO_H
/*
* Convention:
* read{b,w,l,q}/write{b,w,l,q} are for PCI,
* while in{b,w,l}/out{b,w,l} are for ISA
*
* In addition we have 'pausing' versions: in{b,w,l}_p/out{b,w,l}_p
* and 'string' versions: ins{b,w,l}/outs{b,w,l}
*
* While read{b,w,l,q} and write{b,w,l,q} contain memory barriers
* automatically, there are also __raw versions, which do not.
*/
#include <linux/errno.h>
#include <asm/cache.h>
#include <asm/addrspace.h>
#include <asm/machvec.h>
#include <asm/page.h>
#include <linux/pgtable.h>
#define __IO_PREFIX generic
#include <asm/io_generic.h>
#include <asm-generic/pci_iomap.h>
#include <mach/mangle-port.h>
#define __raw_writeb(v,a) (__chk_io_ptr(a), *(volatile u8 __force *)(a) = (v))
#define __raw_writew(v,a) (__chk_io_ptr(a), *(volatile u16 __force *)(a) = (v))
#define __raw_writel(v,a) (__chk_io_ptr(a), *(volatile u32 __force *)(a) = (v))
#define __raw_writeq(v,a) (__chk_io_ptr(a), *(volatile u64 __force *)(a) = (v))
#define __raw_readb(a) (__chk_io_ptr(a), *(volatile u8 __force *)(a))
#define __raw_readw(a) (__chk_io_ptr(a), *(volatile u16 __force *)(a))
#define __raw_readl(a) (__chk_io_ptr(a), *(volatile u32 __force *)(a))
#define __raw_readq(a) (__chk_io_ptr(a), *(volatile u64 __force *)(a))
#define readb_relaxed(c) ({ u8 __v = ioswabb(__raw_readb(c)); __v; })
#define readw_relaxed(c) ({ u16 __v = ioswabw(__raw_readw(c)); __v; })
#define readl_relaxed(c) ({ u32 __v = ioswabl(__raw_readl(c)); __v; })
#define readq_relaxed(c) ({ u64 __v = ioswabq(__raw_readq(c)); __v; })
#define writeb_relaxed(v,c) ((void)__raw_writeb((__force u8)ioswabb(v),c))
#define writew_relaxed(v,c) ((void)__raw_writew((__force u16)ioswabw(v),c))
#define writel_relaxed(v,c) ((void)__raw_writel((__force u32)ioswabl(v),c))
#define writeq_relaxed(v,c) ((void)__raw_writeq((__force u64)ioswabq(v),c))
#define readb(a) ({ u8 r_ = readb_relaxed(a); rmb(); r_; })
#define readw(a) ({ u16 r_ = readw_relaxed(a); rmb(); r_; })
#define readl(a) ({ u32 r_ = readl_relaxed(a); rmb(); r_; })
#define readq(a) ({ u64 r_ = readq_relaxed(a); rmb(); r_; })
#define writeb(v,a) ({ wmb(); writeb_relaxed((v),(a)); })
#define writew(v,a) ({ wmb(); writew_relaxed((v),(a)); })
#define writel(v,a) ({ wmb(); writel_relaxed((v),(a)); })
#define writeq(v,a) ({ wmb(); writeq_relaxed((v),(a)); })
#define readsb(p,d,l) __raw_readsb(p,d,l)
#define readsw(p,d,l) __raw_readsw(p,d,l)
#define readsl(p,d,l) __raw_readsl(p,d,l)
#define writesb(p,d,l) __raw_writesb(p,d,l)
#define writesw(p,d,l) __raw_writesw(p,d,l)
#define writesl(p,d,l) __raw_writesl(p,d,l)
#define __BUILD_UNCACHED_IO(bwlq, type) \
static inline type read##bwlq##_uncached(unsigned long addr) \
{ \
type ret; \
jump_to_uncached(); \
ret = __raw_read##bwlq(addr); \
back_to_cached(); \
return ret; \
} \
\
static inline void write##bwlq##_uncached(type v, unsigned long addr) \
{ \
jump_to_uncached(); \
__raw_write##bwlq(v, addr); \
back_to_cached(); \
}
__BUILD_UNCACHED_IO(b, u8)
__BUILD_UNCACHED_IO(w, u16)
__BUILD_UNCACHED_IO(l, u32)
__BUILD_UNCACHED_IO(q, u64)
#define __BUILD_MEMORY_STRING(pfx, bwlq, type) \
\
static inline void \
pfx##writes##bwlq(volatile void __iomem *mem, const void *addr, \
Annotation
- Immediate include surface: `linux/errno.h`, `asm/cache.h`, `asm/addrspace.h`, `asm/machvec.h`, `asm/page.h`, `linux/pgtable.h`, `asm/io_generic.h`, `asm-generic/pci_iomap.h`.
- Detected declarations: `function __set_io_port_base`.
- Atlas domain: Architecture Layer / arch/sh.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.