u-boot/arch/riscv/include/asm/io.h
Leo Yu-Chi Liang d5af15bf51 riscv: Clean up asm/io.h
Clean up asm/io.h by
- removing commented code
- removing outdated comments
- removing unused definitions (for mem_isa, mem_pci)

This massively improves the readability of the file.

Suggested by commits:
7ab2e47d27 ("arm: Clean up asm/io.h")
909d0399a5 ("ARM: asm/io.h: kill off confusing #ifdef __mem_pci block")

Signed-off-by: Leo Yu-Chi Liang <ycliang@andestech.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2022-05-26 18:41:21 +08:00

328 lines
8.7 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2017 Andes Technology Corporation
* Rick Chen, Andes Technology Corporation <rick@andestech.com>
*
*/
#ifndef __ASM_RISCV_IO_H
#define __ASM_RISCV_IO_H
#include <linux/types.h>
#include <asm/barrier.h>
#include <asm/byteorder.h>
static inline void sync(void)
{
}
#define __arch_getb(a) (*(volatile unsigned char *)(a))
#define __arch_getw(a) (*(volatile unsigned short *)(a))
#define __arch_getl(a) (*(volatile unsigned int *)(a))
#define __arch_getq(a) (*(volatile unsigned long long *)(a))
#define __arch_putb(v, a) (*(volatile unsigned char *)(a) = (v))
#define __arch_putw(v, a) (*(volatile unsigned short *)(a) = (v))
#define __arch_putl(v, a) (*(volatile unsigned int *)(a) = (v))
#define __arch_putq(v, a) (*(volatile unsigned long long *)(a) = (v))
#define __raw_writeb(v, a) __arch_putb(v, a)
#define __raw_writew(v, a) __arch_putw(v, a)
#define __raw_writel(v, a) __arch_putl(v, a)
#define __raw_writeq(v, a) __arch_putq(v, a)
#define __raw_readb(a) __arch_getb(a)
#define __raw_readw(a) __arch_getw(a)
#define __raw_readl(a) __arch_getl(a)
#define __raw_readq(a) __arch_getq(a)
/* adding for cadence_qspi_apb.c */
#define memcpy_fromio(a, c, l) memcpy((a), (c), (l))
#define memcpy_toio(c, a, l) memcpy((c), (a), (l))
#define dmb() mb()
#define __iormb() rmb()
#define __iowmb() wmb()
static inline void writeb(u8 val, volatile void __iomem *addr)
{
__iowmb();
__arch_putb(val, addr);
}
static inline void writew(u16 val, volatile void __iomem *addr)
{
__iowmb();
__arch_putw(val, addr);
}
static inline void writel(u32 val, volatile void __iomem *addr)
{
__iowmb();
__arch_putl(val, addr);
}
static inline void writeq(u64 val, volatile void __iomem *addr)
{
__iowmb();
__arch_putq(val, addr);
}
static inline u8 readb(const volatile void __iomem *addr)
{
u8 val;
val = __arch_getb(addr);
__iormb();
return val;
}
static inline u16 readw(const volatile void __iomem *addr)
{
u16 val;
val = __arch_getw(addr);
__iormb();
return val;
}
static inline u32 readl(const volatile void __iomem *addr)
{
u32 val;
val = __arch_getl(addr);
__iormb();
return val;
}
static inline u64 readq(const volatile void __iomem *addr)
{
u64 val;
val = __arch_getq(addr);
__iormb();
return val;
}
/*
* The compiler seems to be incapable of optimising constants
* properly. Spell it out to the compiler in some cases.
* These are only valid for small values of "off" (< 1<<12)
*/
#define __raw_base_writeb(val, base, off) __arch_base_putb(val, base, off)
#define __raw_base_writew(val, base, off) __arch_base_putw(val, base, off)
#define __raw_base_writel(val, base, off) __arch_base_putl(val, base, off)
#define __raw_base_readb(base, off) __arch_base_getb(base, off)
#define __raw_base_readw(base, off) __arch_base_getw(base, off)
#define __raw_base_readl(base, off) __arch_base_getl(base, off)
#define out_arch(type, endian, a, v) __raw_write##type(cpu_to_##endian(v), a)
#define in_arch(type, endian, a) endian##_to_cpu(__raw_read##type(a))
#define out_le32(a, v) out_arch(l, le32, a, v)
#define out_le16(a, v) out_arch(w, le16, a, v)
#define in_le32(a) in_arch(l, le32, a)
#define in_le16(a) in_arch(w, le16, a)
#define out_be32(a, v) out_arch(l, be32, a, v)
#define out_be16(a, v) out_arch(w, be16, a, v)
#define in_be32(a) in_arch(l, be32, a)
#define in_be16(a) in_arch(w, be16, a)
#define out_8(a, v) __raw_writeb(v, a)
#define in_8(a) __raw_readb(a)
/*
* Clear and set bits in one shot. These macros can be used to clear and
* set multiple bits in a register using a single call. These macros can
* also be used to set a multiple-bit bit pattern using a mask, by
* specifying the mask in the 'clear' parameter and the new bit pattern
* in the 'set' parameter.
*/
#define clrbits(type, addr, clear) \
out_##type((addr), in_##type(addr) & ~(clear))
#define setbits(type, addr, set) \
out_##type((addr), in_##type(addr) | (set))
#define clrsetbits(type, addr, clear, set) \
out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
#define clrbits_be32(addr, clear) clrbits(be32, addr, clear)
#define setbits_be32(addr, set) setbits(be32, addr, set)
#define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)
#define clrbits_le32(addr, clear) clrbits(le32, addr, clear)
#define setbits_le32(addr, set) setbits(le32, addr, set)
#define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)
#define clrbits_be16(addr, clear) clrbits(be16, addr, clear)
#define setbits_be16(addr, set) setbits(be16, addr, set)
#define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)
#define clrbits_le16(addr, clear) clrbits(le16, addr, clear)
#define setbits_le16(addr, set) setbits(le16, addr, set)
#define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)
#define clrbits_8(addr, clear) clrbits(8, addr, clear)
#define setbits_8(addr, set) setbits(8, addr, set)
#define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
/*
* Now, pick up the machine-defined IO definitions
* #include <asm/arch/io.h>
*/
/*
* IO port access primitives
* -------------------------
*
* The NDS32 doesn't have special IO access instructions just like ARM;
* all IO is memory mapped.
* Note that these are defined to perform little endian accesses
* only. Their primary purpose is to access PCI and ISA peripherals.
*
* Note that for a big endian machine, this implies that the following
* big endian mode connectivity is in place, as described by numerious
* ARM documents:
*
* PCI: D0-D7 D8-D15 D16-D23 D24-D31
* ARM: D24-D31 D16-D23 D8-D15 D0-D7
*
* The machine specific io.h include defines __io to translate an "IO"
* address to a memory address.
*
* Note that we prevent GCC re-ordering or caching values in expressions
* by introducing sequence points into the in*() definitions. Note that
* __raw_* do not guarantee this behaviour.
*
* The {in,out}[bwl] macros are for emulating x86-style PCI/ISA IO space.
*/
#ifdef __io
#define outb(v, p) __raw_writeb(v, __io(p))
#define outw(v, p) __raw_writew(cpu_to_le16(v), __io(p))
#define outl(v, p) __raw_writel(cpu_to_le32(v), __io(p))
#define inb(p) ({ unsigned int __v = __raw_readb(__io(p)); __v; })
#define inw(p) ({ unsigned int __v = le16_to_cpu(__raw_readw(__io(p))); __v; })
#define inl(p) ({ unsigned int __v = le32_to_cpu(__raw_readl(__io(p))); __v; })
#define outsb(p, d, l) writesb(__io(p), d, l)
#define outsw(p, d, l) writesw(__io(p), d, l)
#define outsl(p, d, l) writesl(__io(p), d, l)
#define insb(p, d, l) readsb(__io(p), d, l)
#define insw(p, d, l) readsw(__io(p), d, l)
#define insl(p, d, l) readsl(__io(p), d, l)
static inline void readsb(unsigned int *addr, void *data, int bytelen)
{
unsigned char *ptr;
unsigned char *ptr2;
ptr = (unsigned char *)addr;
ptr2 = (unsigned char *)data;
while (bytelen) {
*ptr2 = *ptr;
ptr2++;
bytelen--;
}
}
static inline void readsw(unsigned int *addr, void *data, int wordlen)
{
unsigned short *ptr;
unsigned short *ptr2;
ptr = (unsigned short *)addr;
ptr2 = (unsigned short *)data;
while (wordlen) {
*ptr2 = *ptr;
ptr2++;
wordlen--;
}
}
static inline void readsl(unsigned int *addr, void *data, int longlen)
{
unsigned int *ptr;
unsigned int *ptr2;
ptr = (unsigned int *)addr;
ptr2 = (unsigned int *)data;
while (longlen) {
*ptr2 = *ptr;
ptr2++;
longlen--;
}
}
static inline void writesb(unsigned int *addr, const void *data, int bytelen)
{
unsigned char *ptr;
unsigned char *ptr2;
ptr = (unsigned char *)addr;
ptr2 = (unsigned char *)data;
while (bytelen) {
*ptr = *ptr2;
ptr2++;
bytelen--;
}
}
static inline void writesw(unsigned int *addr, const void *data, int wordlen)
{
unsigned short *ptr;
unsigned short *ptr2;
ptr = (unsigned short *)addr;
ptr2 = (unsigned short *)data;
while (wordlen) {
*ptr = *ptr2;
ptr2++;
wordlen--;
}
}
static inline void writesl(unsigned int *addr, const void *data, int longlen)
{
unsigned int *ptr;
unsigned int *ptr2;
ptr = (unsigned int *)addr;
ptr2 = (unsigned int *)data;
while (longlen) {
*ptr = *ptr2;
ptr2++;
longlen--;
}
}
#endif
#define outb_p(val, port) outb((val), (port))
#define outw_p(val, port) outw((val), (port))
#define outl_p(val, port) outl((val), (port))
#define inb_p(port) inb((port))
#define inw_p(port) inw((port))
#define inl_p(port) inl((port))
#define outsb_p(port, from, len) outsb(port, from, len)
#define outsw_p(port, from, len) outsw(port, from, len)
#define outsl_p(port, from, len) outsl(port, from, len)
#define insb_p(port, to, len) insb(port, to, len)
#define insw_p(port, to, len) insw(port, to, len)
#define insl_p(port, to, len) insl(port, to, len)
#include <asm-generic/io.h>
#endif /* __ASM_RISCV_IO_H */