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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _M68KNOMMU_IO_H
#define _M68KNOMMU_IO_H

#ifdef __KERNEL__

#define ARCH_HAS_IOREMAP_WT

#include <asm/virtconvert.h>
#include <asm-generic/iomap.h>

/*
 * These are for ISA/PCI shared memory _only_ and should never be used
 * on any other type of memory, including Zorro memory. They are meant to
 * access the bus in the bus byte order which is little-endian!.
 *
 * readX/writeX() are used to access memory mapped devices. On some
 * architectures the memory mapped IO stuff needs to be accessed
 * differently. On the m68k architecture, we just read/write the
 * memory location directly.
 */
/* ++roman: The assignments to temp. vars avoid that gcc sometimes generates
 * two accesses to memory, which may be undesirable for some devices.
 */

/*
 * swap functions are sometimes needed to interface little-endian hardware
 */
static inline unsigned short _swapw(volatile unsigned short v)
{
    return ((v << 8) | (v >> 8));
}

static inline unsigned int _swapl(volatile unsigned long v)
{
    return ((v << 24) | ((v & 0xff00) << 8) | ((v & 0xff0000) >> 8) | (v >> 24));
}

#define readb(addr) \
    ({ unsigned char __v = (*(volatile unsigned char *) (addr)); __v; })
#define readw(addr) \
    ({ unsigned short __v = (*(volatile unsigned short *) (addr)); __v; })
#define readl(addr) \
    ({ unsigned int __v = (*(volatile unsigned int *) (addr)); __v; })

#define writeb(b,addr) (void)((*(volatile unsigned char *) (addr)) = (b))
#define writew(b,addr) (void)((*(volatile unsigned short *) (addr)) = (b))
#define writel(b,addr) (void)((*(volatile unsigned int *) (addr)) = (b))

#define __raw_readb readb
#define __raw_readw readw
#define __raw_readl readl
#define __raw_writeb writeb
#define __raw_writew writew
#define __raw_writel writel

static inline void io_outsb(unsigned int addr, const void *buf, int len)
{
	volatile unsigned char *ap = (volatile unsigned char *) addr;
	unsigned char *bp = (unsigned char *) buf;
	while (len--)
		*ap = *bp++;
}

static inline void io_outsw(unsigned int addr, const void *buf, int len)
{
	volatile unsigned short *ap = (volatile unsigned short *) addr;
	unsigned short *bp = (unsigned short *) buf;
	while (len--)
		*ap = _swapw(*bp++);
}

static inline void io_outsl(unsigned int addr, const void *buf, int len)
{
	volatile unsigned int *ap = (volatile unsigned int *) addr;
	unsigned int *bp = (unsigned int *) buf;
	while (len--)
		*ap = _swapl(*bp++);
}

static inline void io_insb(unsigned int addr, void *buf, int len)
{
	volatile unsigned char *ap = (volatile unsigned char *) addr;
	unsigned char *bp = (unsigned char *) buf;
	while (len--)
		*bp++ = *ap;
}

static inline void io_insw(unsigned int addr, void *buf, int len)
{
	volatile unsigned short *ap = (volatile unsigned short *) addr;
	unsigned short *bp = (unsigned short *) buf;
	while (len--)
		*bp++ = _swapw(*ap);
}

static inline void io_insl(unsigned int addr, void *buf, int len)
{
	volatile unsigned int *ap = (volatile unsigned int *) addr;
	unsigned int *bp = (unsigned int *) buf;
	while (len--)
		*bp++ = _swapl(*ap);
}

#define mmiowb()

/*
 *	make the short names macros so specific devices
 *	can override them as required
 */

#define memset_io(a,b,c)	memset((void *)(a),(b),(c))
#define memcpy_fromio(a,b,c)	memcpy((a),(void *)(b),(c))
#define memcpy_toio(a,b,c)	memcpy((void *)(a),(b),(c))

#define inb(addr)    readb(addr)
#define inw(addr)    readw(addr)
#define inl(addr)    readl(addr)
#define outb(x,addr) ((void) writeb(x,addr))
#define outw(x,addr) ((void) writew(x,addr))
#define outl(x,addr) ((void) writel(x,addr))

#define inb_p(addr)    inb(addr)
#define inw_p(addr)    inw(addr)
#define inl_p(addr)    inl(addr)
#define outb_p(x,addr) outb(x,addr)
#define outw_p(x,addr) outw(x,addr)
#define outl_p(x,addr) outl(x,addr)

#define outsb(a,b,l) io_outsb(a,b,l)
#define outsw(a,b,l) io_outsw(a,b,l)
#define outsl(a,b,l) io_outsl(a,b,l)

#define insb(a,b,l) io_insb(a,b,l)
#define insw(a,b,l) io_insw(a,b,l)
#define insl(a,b,l) io_insl(a,b,l)

#define IO_SPACE_LIMIT 0xffffffff


/* Values for nocacheflag and cmode */
#define IOMAP_FULL_CACHING		0
#define IOMAP_NOCACHE_SER		1
#define IOMAP_NOCACHE_NONSER		2
#define IOMAP_WRITETHROUGH		3

static inline void *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag)
{
	return (void *) physaddr;
}
static inline void *ioremap(unsigned long physaddr, unsigned long size)
{
	return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
}
static inline void *ioremap_nocache(unsigned long physaddr, unsigned long size)
{
	return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
}
static inline void *ioremap_wt(unsigned long physaddr, unsigned long size)
{
	return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
}
static inline void *ioremap_fullcache(unsigned long physaddr, unsigned long size)
{
	return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
}

#define	iounmap(addr)	do { } while(0)

/*
 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 * access
 */
#define xlate_dev_mem_ptr(p)	__va(p)

/*
 * Convert a virtual cached pointer to an uncached pointer
 */
#define xlate_dev_kmem_ptr(p)	p

static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
{
	return (void __iomem *) port;
}

static inline void ioport_unmap(void __iomem *p)
{
}

#endif /* __KERNEL__ */

#endif /* _M68KNOMMU_IO_H */

Filemanager

Name Type Size Permission Actions
Kbuild File 599 B 0644
MC68328.h File 37.82 KB 0644
MC68EZ328.h File 37.74 KB 0644
MC68VZ328.h File 41.02 KB 0644
a.out-core.h File 1.98 KB 0644
adb_iop.h File 1.09 KB 0644
amigahw.h File 10.49 KB 0644
amigaints.h File 3.5 KB 0644
amigayle.h File 3.19 KB 0644
amipcmcia.h File 2.51 KB 0644
apollohw.h File 2.35 KB 0644
asm-offsets.h File 35 B 0644
asm-prototypes.h File 211 B 0644
atafd.h File 300 B 0644
atafdreg.h File 2.68 KB 0644
atari_joystick.h File 457 B 0644
atari_stdma.h File 514 B 0644
atari_stram.h File 528 B 0644
atarihw.h File 20.3 KB 0644
atariints.h File 5.56 KB 0644
atarikb.h File 1.4 KB 0644
atomic.h File 4.86 KB 0644
bitops.h File 12.19 KB 0644
blinken.h File 641 B 0644
bootinfo.h File 783 B 0644
bootstd.h File 4.64 KB 0644
bug.h File 659 B 0644
bugs.h File 369 B 0644
bvme6000hw.h File 3.45 KB 0644
cache.h File 296 B 0644
cacheflush.h File 133 B 0644
cacheflush_mm.h File 6.92 KB 0644
cacheflush_no.h File 2.61 KB 0644
checksum.h File 3.4 KB 0644
cmpxchg.h File 3.34 KB 0644
coldfire.h File 1.61 KB 0644
contregs.h File 3.31 KB 0644
current.h File 580 B 0644
delay.h File 3.43 KB 0644
div64.h File 858 B 0644
dma-mapping.h File 291 B 0644
dma.h File 16.65 KB 0644
dsp56k.h File 1.24 KB 0644
dvma.h File 9.67 KB 0644
elf.h File 3.07 KB 0644
entry.h File 5.76 KB 0644
export.h File 74 B 0644
fb.h File 921 B 0644
fbio.h File 9.87 KB 0644
flat.h File 1.02 KB 0644
floppy.h File 5.06 KB 0644
fpu.h File 535 B 0644
ftrace.h File 12 B 0644
gpio.h File 2.64 KB 0644
hardirq.h File 594 B 0644
hash.h File 2.07 KB 0644
hp300hw.h File 186 B 0644
hwtest.h File 467 B 0644
ide.h File 1.67 KB 0644
idprom.h File 725 B 0644
intersil.h File 1.11 KB 0644
io.h File 383 B 0644
io_mm.h File 16.19 KB 0644
io_no.h File 5.26 KB 0644
irq.h File 2.57 KB 0644
irqflags.h File 1.61 KB 0644
kexec.h File 732 B 0644
linkage.h File 1.55 KB 0644
m5206sim.h File 6.4 KB 0644
m520xsim.h File 7.15 KB 0644
m523xsim.h File 7.7 KB 0644
m525xsim.h File 10.57 KB 0644
m5272sim.h File 6.05 KB 0644
m527xsim.h File 13.51 KB 0644
m528xsim.h File 9.37 KB 0644
m52xxacr.h File 3.57 KB 0644
m5307sim.h File 7.52 KB 0644
m53xxacr.h File 3.6 KB 0644
m53xxsim.h File 53.97 KB 0644
m5407sim.h File 6.14 KB 0644
m5441xsim.h File 8.5 KB 0644
m54xxacr.h File 4.82 KB 0644
m54xxgpt.h File 3.66 KB 0644
m54xxpci.h File 6.13 KB 0644
m54xxsim.h File 3.8 KB 0644
mac_asc.h File 520 B 0644
mac_baboon.h File 999 B 0644
mac_iop.h File 5.37 KB 0644
mac_oss.h File 1.83 KB 0644
mac_psc.h File 7.25 KB 0644
mac_via.h File 11.44 KB 0644
machdep.h File 1.34 KB 0644
machines.h File 3.13 KB 0644
machw.h File 588 B 0644
macintosh.h File 2.02 KB 0644
macints.h File 3.28 KB 0644
math-emu.h File 6.74 KB 0644
mc146818rtc.h File 598 B 0644
mcf8390.h File 3.75 KB 0644
mcf_pgalloc.h File 2.37 KB 0644
mcf_pgtable.h File 9.89 KB 0644
mcfclk.h File 1.01 KB 0644
mcfdma.h File 6.51 KB 0644
mcfgpio.h File 8.48 KB 0644
mcfintc.h File 3.09 KB 0644
mcfmmu.h File 3.67 KB 0644
mcfpit.h File 2.22 KB 0644
mcfqspi.h File 1.82 KB 0644
mcfsim.h File 1.5 KB 0644
mcfslt.h File 1.21 KB 0644
mcftimer.h File 2.3 KB 0644
mcfuart.h File 6.91 KB 0644
mcfwdebug.h File 4.99 KB 0644
mmu.h File 243 B 0644
mmu_context.h File 7.2 KB 0644
mmzone.h File 264 B 0644
module.h File 847 B 0644
motorola_pgalloc.h File 2.26 KB 0644
motorola_pgtable.h File 9.2 KB 0644
movs.h File 1.44 KB 0644
mvme147hw.h File 2.81 KB 0644
mvme16xhw.h File 2.16 KB 0644
natfeat.h File 533 B 0644
nettel.h File 2.95 KB 0644
nubus.h File 1.21 KB 0644
openprom.h File 7.98 KB 0644
oplib.h File 9.54 KB 0644
page.h File 1.47 KB 0644
page_mm.h File 4.06 KB 0644
page_no.h File 1.28 KB 0644
page_offset.h File 256 B 0644
parport.h File 837 B 0644
pci.h File 458 B 0644
pgalloc.h File 444 B 0644
pgtable.h File 127 B 0644
pgtable_mm.h File 4.84 KB 0644
pgtable_no.h File 1.57 KB 0644
processor.h File 3.59 KB 0644
ptrace.h File 643 B 0644
q40_master.h File 2.28 KB 0644
q40ints.h File 749 B 0644
quicc_simple.h File 1.79 KB 0644
raw_io.h File 11.41 KB 0644
segment.h File 1.42 KB 0644
serial.h File 1.14 KB 0644
setup.h File 9.25 KB 0644
signal.h File 1.34 KB 0644
smp.h File 32 B 0644
string.h File 1.68 KB 0644
sun3-head.h File 353 B 0644
sun3_pgalloc.h File 2.26 KB 0644
sun3_pgtable.h File 7.65 KB 0644
sun3ints.h File 989 B 0644
sun3mmu.h File 4.91 KB 0644
sun3x.h File 868 B 0644
sun3xflop.h File 5.62 KB 0644
sun3xprom.h File 1.31 KB 0644
switch_to.h File 1.51 KB 0644
thread_info.h File 2.02 KB 0644
timex.h File 974 B 0644
tlb.h File 486 B 0644
tlbflush.h File 5.95 KB 0644
traps.h File 8.33 KB 0644
uaccess.h File 152 B 0644
uaccess_mm.h File 10.31 KB 0644
uaccess_no.h File 3.69 KB 0644
ucontext.h File 570 B 0644
unaligned.h File 600 B 0644
unistd.h File 952 B 0644
user.h File 3.78 KB 0644
vga.h File 651 B 0644
virtconvert.h File 947 B 0644
zorro.h File 1.17 KB 0644