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-rw-r--r--arch/sh/include/asm/io.h257
-rw-r--r--arch/sh/include/asm/io_generic.h7
-rw-r--r--arch/sh/include/asm/machvec.h7
-rw-r--r--arch/sh/kernel/io.c12
-rw-r--r--arch/sh/kernel/io_generic.c61
-rw-r--r--arch/sh/kernel/machvec.c3
6 files changed, 115 insertions, 232 deletions
diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h
index d9e794eff830..436c28539577 100644
--- a/arch/sh/include/asm/io.h
+++ b/arch/sh/include/asm/io.h
@@ -1,27 +1,26 @@
#ifndef __ASM_SH_IO_H
#define __ASM_SH_IO_H
-
/*
* Convention:
- * read{b,w,l}/write{b,w,l} are for PCI,
+ * 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
- * These may (will) be platform specific function.
+ *
* 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}
- * For read{b,w,l} and write{b,w,l} there are also __raw versions, which
- * do not have a memory barrier after them.
*
- * In addition, we have
- * ctrl_in{b,w,l}/ctrl_out{b,w,l} for SuperH specific I/O.
- * which are processor specific.
- */
-
-/*
- * We follow the Alpha convention here:
- * __inb expands to an inline function call (which calls via the mv)
- * _inb is a real function call (note ___raw fns are _ version of __raw)
- * inb by default expands to _inb, but the machine specific code may
- * define it to __inb if it chooses.
+ * While read{b,w,l,q} and write{b,w,l,q} contain memory barriers
+ * automatically, there are also __raw versions, which do not.
+ *
+ * Historically, we have also had ctrl_in{b,w,l,q}/ctrl_out{b,w,l,q} for
+ * SuperH specific I/O (raw I/O to on-chip CPU peripherals). In practice
+ * these have the same semantics as the __raw variants, and as such, all
+ * new code should be using the __raw versions.
+ *
+ * All ISA I/O routines are wrapped through the machine vector. If a
+ * board does not provide overrides, a generic set that are copied in
+ * from the default machine vector are used instead. These are largely
+ * for old compat code for I/O offseting to SuperIOs, all of which are
+ * better handled through the machvec ioport mapping routines these days.
*/
#include <asm/cache.h>
#include <asm/system.h>
@@ -31,7 +30,6 @@
#include <asm-generic/iomap.h>
#ifdef __KERNEL__
-
/*
* Depending on which platform we are running on, we need different
* I/O functions.
@@ -40,90 +38,64 @@
#include <asm/io_generic.h>
#include <asm/io_trapped.h>
-#define maybebadio(port) \
- printk(KERN_ERR "bad PC-like io %s:%u for port 0x%lx at 0x%08x\n", \
- __FUNCTION__, __LINE__, (port), (u32)__builtin_return_address(0))
+#define inb(p) sh_mv.mv_inb((p))
+#define inw(p) sh_mv.mv_inw((p))
+#define inl(p) sh_mv.mv_inl((p))
+#define outb(x,p) sh_mv.mv_outb((x),(p))
+#define outw(x,p) sh_mv.mv_outw((x),(p))
+#define outl(x,p) sh_mv.mv_outl((x),(p))
+
+#define inb_p(p) sh_mv.mv_inb_p((p))
+#define inw_p(p) sh_mv.mv_inw_p((p))
+#define inl_p(p) sh_mv.mv_inl_p((p))
+#define outb_p(x,p) sh_mv.mv_outb_p((x),(p))
+#define outw_p(x,p) sh_mv.mv_outw_p((x),(p))
+#define outl_p(x,p) sh_mv.mv_outl_p((x),(p))
+
+#define insb(p,b,c) sh_mv.mv_insb((p), (b), (c))
+#define insw(p,b,c) sh_mv.mv_insw((p), (b), (c))
+#define insl(p,b,c) sh_mv.mv_insl((p), (b), (c))
+#define outsb(p,b,c) sh_mv.mv_outsb((p), (b), (c))
+#define outsw(p,b,c) sh_mv.mv_outsw((p), (b), (c))
+#define outsl(p,b,c) sh_mv.mv_outsl((p), (b), (c))
+
+#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(a) ({ u8 r_ = __raw_readb(a); mb(); r_; })
+#define readw(a) ({ u16 r_ = __raw_readw(a); mb(); r_; })
+#define readl(a) ({ u32 r_ = __raw_readl(a); mb(); r_; })
+#define readq(a) ({ u64 r_ = __raw_readq(a); mb(); r_; })
+
+#define writeb(v,a) ({ __raw_writeb((v),(a)); mb(); })
+#define writew(v,a) ({ __raw_writew((v),(a)); mb(); })
+#define writel(v,a) ({ __raw_writel((v),(a)); mb(); })
+#define writeq(v,a) ({ __raw_writeq((v),(a)); mb(); })
-/*
- * Since boards are able to define their own set of I/O routines through
- * their respective machine vector, we always wrap through the mv.
- *
- * Also, in the event that a board hasn't provided its own definition for
- * a given routine, it will be wrapped to generic code at run-time.
- */
-
-#define __inb(p) sh_mv.mv_inb((p))
-#define __inw(p) sh_mv.mv_inw((p))
-#define __inl(p) sh_mv.mv_inl((p))
-#define __outb(x,p) sh_mv.mv_outb((x),(p))
-#define __outw(x,p) sh_mv.mv_outw((x),(p))
-#define __outl(x,p) sh_mv.mv_outl((x),(p))
-
-#define __inb_p(p) sh_mv.mv_inb_p((p))
-#define __inw_p(p) sh_mv.mv_inw_p((p))
-#define __inl_p(p) sh_mv.mv_inl_p((p))
-#define __outb_p(x,p) sh_mv.mv_outb_p((x),(p))
-#define __outw_p(x,p) sh_mv.mv_outw_p((x),(p))
-#define __outl_p(x,p) sh_mv.mv_outl_p((x),(p))
-
-#define __insb(p,b,c) sh_mv.mv_insb((p), (b), (c))
-#define __insw(p,b,c) sh_mv.mv_insw((p), (b), (c))
-#define __insl(p,b,c) sh_mv.mv_insl((p), (b), (c))
-#define __outsb(p,b,c) sh_mv.mv_outsb((p), (b), (c))
-#define __outsw(p,b,c) sh_mv.mv_outsw((p), (b), (c))
-#define __outsl(p,b,c) sh_mv.mv_outsl((p), (b), (c))
-
-#define __readb(a) sh_mv.mv_readb((a))
-#define __readw(a) sh_mv.mv_readw((a))
-#define __readl(a) sh_mv.mv_readl((a))
-#define __writeb(v,a) sh_mv.mv_writeb((v),(a))
-#define __writew(v,a) sh_mv.mv_writew((v),(a))
-#define __writel(v,a) sh_mv.mv_writel((v),(a))
-
-#define inb __inb
-#define inw __inw
-#define inl __inl
-#define outb __outb
-#define outw __outw
-#define outl __outl
-
-#define inb_p __inb_p
-#define inw_p __inw_p
-#define inl_p __inl_p
-#define outb_p __outb_p
-#define outw_p __outw_p
-#define outl_p __outl_p
-
-#define insb __insb
-#define insw __insw
-#define insl __insl
-#define outsb __outsb
-#define outsw __outsw
-#define outsl __outsl
-
-#define __raw_writeb(v,a) (__chk_io_ptr(a), *(volatile unsigned char __force *)(a) = (v))
-#define __raw_writew(v,a) (__chk_io_ptr(a), *(volatile unsigned short __force *)(a) = (v))
-#define __raw_writel(v,a) (__chk_io_ptr(a), *(volatile unsigned int __force *)(a) = (v))
-
-#define __raw_readb(a) (__chk_io_ptr(a), *(volatile unsigned char __force *)(a))
-#define __raw_readw(a) (__chk_io_ptr(a), *(volatile unsigned short __force *)(a))
-#define __raw_readl(a) (__chk_io_ptr(a), *(volatile unsigned int __force *)(a))
-
-void __raw_writesl(void __iomem *addr, const void *data, int longlen);
-void __raw_readsl(const void __iomem *addr, void *data, int longlen);
+/* SuperH on-chip I/O functions */
+#define ctrl_inb __raw_readb
+#define ctrl_inw __raw_readw
+#define ctrl_inl __raw_readl
+#define ctrl_inq __raw_readq
-/*
- * The platform header files may define some of these macros to use
- * the inlined versions where appropriate. These macros may also be
- * redefined by userlevel programs.
- */
-#define readb(a) ({ unsigned int r_ = __readb(a); mb(); r_; })
-#define readw(a) ({ unsigned int r_ = __readw(a); mb(); r_; })
-#define readl(a) ({ unsigned int r_ = __readl(a); mb(); r_; })
+#define ctrl_outb __raw_writeb
+#define ctrl_outw __raw_writew
+#define ctrl_outl __raw_writel
+#define ctrl_outq __raw_writeq
-#define writeb(v,a) ({ __writeb((v),(a)); mb(); })
-#define writew(v,a) ({ __writew((v),(a)); mb(); })
-#define writel(v,a) ({ __writel((v),(a)); mb(); })
+static inline void ctrl_delay(void)
+{
+#ifdef P2SEG
+ __raw_readw(P2SEG);
+#endif
+}
#define __BUILD_MEMORY_STRING(bwlq, type) \
\
@@ -151,18 +123,23 @@ static inline void __raw_reads##bwlq(volatile void __iomem *mem, \
__BUILD_MEMORY_STRING(b, u8)
__BUILD_MEMORY_STRING(w, u16)
+__BUILD_MEMORY_STRING(q, u64)
+
+void __raw_writesl(void __iomem *addr, const void *data, int longlen);
+void __raw_readsl(const void __iomem *addr, void *data, int longlen);
-#define writesb __raw_writesb
-#define writesw __raw_writesw
-#define writesl __raw_writesl
+#define writesb __raw_writesb
+#define writesw __raw_writesw
+#define writesl __raw_writesl
-#define readsb __raw_readsb
-#define readsw __raw_readsw
-#define readsl __raw_readsl
+#define readsb __raw_readsb
+#define readsw __raw_readsw
+#define readsl __raw_readsl
-#define readb_relaxed(a) readb(a)
-#define readw_relaxed(a) readw(a)
-#define readl_relaxed(a) readl(a)
+#define readb_relaxed(a) readb(a)
+#define readw_relaxed(a) readw(a)
+#define readl_relaxed(a) readl(a)
+#define readq_relaxed(a) readq(a)
/* Simple MMIO */
#define ioread8(a) __raw_readb(a)
@@ -185,15 +162,17 @@ __BUILD_MEMORY_STRING(w, u16)
#define iowrite16_rep(a, s, c) __raw_writesw((a), (s), (c))
#define iowrite32_rep(a, s, c) __raw_writesl((a), (s), (c))
-#define mmiowb() wmb() /* synco on SH-4A, otherwise a nop */
+/* synco on SH-4A, otherwise a nop */
+#define mmiowb() wmb()
#define IO_SPACE_LIMIT 0xffffffff
extern unsigned long generic_io_base;
/*
- * This function provides a method for the generic case where a board-specific
- * ioport_map simply needs to return the port + some arbitrary port base.
+ * This function provides a method for the generic case where a
+ * board-specific ioport_map simply needs to return the port + some
+ * arbitrary port base.
*
* We use this at board setup time to implicitly set the port base, and
* as a result, we can use the generic ioport_map.
@@ -206,57 +185,9 @@ static inline void __set_io_port_base(unsigned long pbase)
#define __ioport_map(p, n) sh_mv.mv_ioport_map((p), (n))
/* We really want to try and get these to memcpy etc */
-extern void memcpy_fromio(void *, volatile void __iomem *, unsigned long);
-extern void memcpy_toio(volatile void __iomem *, const void *, unsigned long);
-extern void memset_io(volatile void __iomem *, int, unsigned long);
-
-/* SuperH on-chip I/O functions */
-static inline unsigned char ctrl_inb(unsigned long addr)
-{
- return *(volatile unsigned char*)addr;
-}
-
-static inline unsigned short ctrl_inw(unsigned long addr)
-{
- return *(volatile unsigned short*)addr;
-}
-
-static inline unsigned int ctrl_inl(unsigned long addr)
-{
- return *(volatile unsigned long*)addr;
-}
-
-static inline unsigned long long ctrl_inq(unsigned long addr)
-{
- return *(volatile unsigned long long*)addr;
-}
-
-static inline void ctrl_outb(unsigned char b, unsigned long addr)
-{
- *(volatile unsigned char*)addr = b;
-}
-
-static inline void ctrl_outw(unsigned short b, unsigned long addr)
-{
- *(volatile unsigned short*)addr = b;
-}
-
-static inline void ctrl_outl(unsigned int b, unsigned long addr)
-{
- *(volatile unsigned long*)addr = b;
-}
-
-static inline void ctrl_outq(unsigned long long b, unsigned long addr)
-{
- *(volatile unsigned long long*)addr = b;
-}
-
-static inline void ctrl_delay(void)
-{
-#ifdef P2SEG
- ctrl_inw(P2SEG);
-#endif
-}
+void memcpy_fromio(void *, const volatile void __iomem *, unsigned long);
+void memcpy_toio(volatile void __iomem *, const void *, unsigned long);
+void memset_io(volatile void __iomem *, int, unsigned long);
/* Quad-word real-mode I/O, don't ask.. */
unsigned long long peek_real_address_q(unsigned long long addr);
@@ -347,6 +278,10 @@ __ioremap_mode(unsigned long offset, unsigned long size, unsigned long flags)
#define iounmap(addr) \
__iounmap((addr))
+#define maybebadio(port) \
+ printk(KERN_ERR "bad PC-like io %s:%u for port 0x%lx at 0x%08x\n", \
+ __func__, __LINE__, (port), (u32)__builtin_return_address(0))
+
/*
* Convert a physical pointer to a virtual kernel pointer for /dev/mem
* access
diff --git a/arch/sh/include/asm/io_generic.h b/arch/sh/include/asm/io_generic.h
index 92fc6070d7b3..1e5d375f55dc 100644
--- a/arch/sh/include/asm/io_generic.h
+++ b/arch/sh/include/asm/io_generic.h
@@ -33,13 +33,6 @@ void IO_CONCAT(__IO_PREFIX,outsb)(unsigned long, const void *src, unsigned long
void IO_CONCAT(__IO_PREFIX,outsw)(unsigned long, const void *src, unsigned long count);
void IO_CONCAT(__IO_PREFIX,outsl)(unsigned long, const void *src, unsigned long count);
-u8 IO_CONCAT(__IO_PREFIX,readb)(void __iomem *);
-u16 IO_CONCAT(__IO_PREFIX,readw)(void __iomem *);
-u32 IO_CONCAT(__IO_PREFIX,readl)(void __iomem *);
-void IO_CONCAT(__IO_PREFIX,writeb)(u8, void __iomem *);
-void IO_CONCAT(__IO_PREFIX,writew)(u16, void __iomem *);
-void IO_CONCAT(__IO_PREFIX,writel)(u32, void __iomem *);
-
void *IO_CONCAT(__IO_PREFIX,ioremap)(unsigned long offset, unsigned long size);
void IO_CONCAT(__IO_PREFIX,iounmap)(void *addr);
diff --git a/arch/sh/include/asm/machvec.h b/arch/sh/include/asm/machvec.h
index b2e4124070ae..f1bae02ef7b6 100644
--- a/arch/sh/include/asm/machvec.h
+++ b/arch/sh/include/asm/machvec.h
@@ -42,13 +42,6 @@ struct sh_machine_vector {
void (*mv_outsw)(unsigned long, const void *src, unsigned long count);
void (*mv_outsl)(unsigned long, const void *src, unsigned long count);
- u8 (*mv_readb)(void __iomem *);
- u16 (*mv_readw)(void __iomem *);
- u32 (*mv_readl)(void __iomem *);
- void (*mv_writeb)(u8, void __iomem *);
- void (*mv_writew)(u16, void __iomem *);
- void (*mv_writel)(u32, void __iomem *);
-
int (*mv_irq_demux)(int irq);
void (*mv_init_irq)(void);
diff --git a/arch/sh/kernel/io.c b/arch/sh/kernel/io.c
index 2b8991229900..29cf4588fc05 100644
--- a/arch/sh/kernel/io.c
+++ b/arch/sh/kernel/io.c
@@ -19,12 +19,12 @@
* Copy data from IO memory space to "real" memory space.
* This needs to be optimized.
*/
-void memcpy_fromio(void *to, volatile void __iomem *from, unsigned long count)
+void memcpy_fromio(void *to, const volatile void __iomem *from, unsigned long count)
{
- char *p = to;
+ unsigned char *p = to;
while (count) {
count--;
- *p = readb((void __iomem *)from);
+ *p = readb(from);
p++;
from++;
}
@@ -37,10 +37,10 @@ EXPORT_SYMBOL(memcpy_fromio);
*/
void memcpy_toio(volatile void __iomem *to, const void *from, unsigned long count)
{
- const char *p = from;
+ const unsigned char *p = from;
while (count) {
count--;
- writeb(*p, (void __iomem *)to);
+ writeb(*p, to);
p++;
to++;
}
@@ -55,7 +55,7 @@ void memset_io(volatile void __iomem *dst, int c, unsigned long count)
{
while (count) {
count--;
- writeb(c, (void __iomem *)dst);
+ writeb(c, dst);
dst++;
}
}
diff --git a/arch/sh/kernel/io_generic.c b/arch/sh/kernel/io_generic.c
index f1b214d3bce3..5a7f554d9ca1 100644
--- a/arch/sh/kernel/io_generic.c
+++ b/arch/sh/kernel/io_generic.c
@@ -19,38 +19,33 @@
/* SH3 has a PCMCIA bug that needs a dummy read from area 6 for a
* workaround. */
/* I'm not sure SH7709 has this kind of bug */
-#define dummy_read() ctrl_inb(0xba000000)
+#define dummy_read() __raw_readb(0xba000000)
#else
#define dummy_read()
#endif
unsigned long generic_io_base;
-static inline void delay(void)
-{
- ctrl_inw(0xa0000000);
-}
-
u8 generic_inb(unsigned long port)
{
- return ctrl_inb((unsigned long __force)__ioport_map(port, 1));
+ return __raw_readb(__ioport_map(port, 1));
}
u16 generic_inw(unsigned long port)
{
- return ctrl_inw((unsigned long __force)__ioport_map(port, 2));
+ return __raw_readw(__ioport_map(port, 2));
}
u32 generic_inl(unsigned long port)
{
- return ctrl_inl((unsigned long __force)__ioport_map(port, 4));
+ return __raw_readl(__ioport_map(port, 4));
}
u8 generic_inb_p(unsigned long port)
{
unsigned long v = generic_inb(port);
- delay();
+ ctrl_delay();
return v;
}
@@ -58,7 +53,7 @@ u16 generic_inw_p(unsigned long port)
{
unsigned long v = generic_inw(port);
- delay();
+ ctrl_delay();
return v;
}
@@ -66,7 +61,7 @@ u32 generic_inl_p(unsigned long port)
{
unsigned long v = generic_inl(port);
- delay();
+ ctrl_delay();
return v;
}
@@ -112,35 +107,35 @@ void generic_insl(unsigned long port, void *dst, unsigned long count)
void generic_outb(u8 b, unsigned long port)
{
- ctrl_outb(b, (unsigned long __force)__ioport_map(port, 1));
+ __raw_writeb(b, __ioport_map(port, 1));
}
void generic_outw(u16 b, unsigned long port)
{
- ctrl_outw(b, (unsigned long __force)__ioport_map(port, 2));
+ __raw_writew(b, __ioport_map(port, 2));
}
void generic_outl(u32 b, unsigned long port)
{
- ctrl_outl(b, (unsigned long __force)__ioport_map(port, 4));
+ __raw_writel(b, __ioport_map(port, 4));
}
void generic_outb_p(u8 b, unsigned long port)
{
generic_outb(b, port);
- delay();
+ ctrl_delay();
}
void generic_outw_p(u16 b, unsigned long port)
{
generic_outw(b, port);
- delay();
+ ctrl_delay();
}
void generic_outl_p(u32 b, unsigned long port)
{
generic_outl(b, port);
- delay();
+ ctrl_delay();
}
/*
@@ -184,36 +179,6 @@ void generic_outsl(unsigned long port, const void *src, unsigned long count)
dummy_read();
}
-u8 generic_readb(void __iomem *addr)
-{
- return ctrl_inb((unsigned long __force)addr);
-}
-
-u16 generic_readw(void __iomem *addr)
-{
- return ctrl_inw((unsigned long __force)addr);
-}
-
-u32 generic_readl(void __iomem *addr)
-{
- return ctrl_inl((unsigned long __force)addr);
-}
-
-void generic_writeb(u8 b, void __iomem *addr)
-{
- ctrl_outb(b, (unsigned long __force)addr);
-}
-
-void generic_writew(u16 b, void __iomem *addr)
-{
- ctrl_outw(b, (unsigned long __force)addr);
-}
-
-void generic_writel(u32 b, void __iomem *addr)
-{
- ctrl_outl(b, (unsigned long __force)addr);
-}
-
void __iomem *generic_ioport_map(unsigned long addr, unsigned int size)
{
return (void __iomem *)(addr + generic_io_base);
diff --git a/arch/sh/kernel/machvec.c b/arch/sh/kernel/machvec.c
index 8bfdd275e940..c1ea41e5812a 100644
--- a/arch/sh/kernel/machvec.c
+++ b/arch/sh/kernel/machvec.c
@@ -126,9 +126,6 @@ void __init sh_mv_setup(void)
mv_set(insb); mv_set(insw); mv_set(insl);
mv_set(outsb); mv_set(outsw); mv_set(outsl);
- mv_set(readb); mv_set(readw); mv_set(readl);
- mv_set(writeb); mv_set(writew); mv_set(writel);
-
mv_set(ioport_map);
mv_set(ioport_unmap);
mv_set(irq_demux);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.