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-rw-r--r--arch/riscv/include/asm/io.h494
1 files changed, 494 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/io.h b/arch/riscv/include/asm/io.h
new file mode 100644
index 0000000000..e7f63ed8a9
--- /dev/null
+++ b/arch/riscv/include/asm/io.h
@@ -0,0 +1,494 @@
+/*
+ * Copyright (C) 2017 Andes Technology Corporation
+ * Rick Chen, Andes Technology Corporation <rick@andestech.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ */
+#ifndef __ASM_RISCV_IO_H
+#define __ASM_RISCV_IO_H
+
+#ifdef __KERNEL__
+
+#include <linux/types.h>
+#include <asm/byteorder.h>
+
+static inline void sync(void)
+{
+}
+
+/*
+ * Given a physical address and a length, return a virtual address
+ * that can be used to access the memory range with the caching
+ * properties specified by "flags".
+ */
+#define MAP_NOCACHE (0)
+#define MAP_WRCOMBINE (0)
+#define MAP_WRBACK (0)
+#define MAP_WRTHROUGH (0)
+
+#ifdef CONFIG_ARCH_MAP_SYSMEM
+static inline void *map_sysmem(phys_addr_t paddr, unsigned long len)
+{
+ if (paddr < PHYS_SDRAM_0_SIZE + PHYS_SDRAM_1_SIZE)
+ paddr = paddr | 0x40000000;
+ return (void *)(uintptr_t)paddr;
+}
+
+static inline void *unmap_sysmem(const void *vaddr)
+{
+ phys_addr_t paddr = (phys_addr_t)vaddr;
+
+ paddr = paddr & ~0x40000000;
+ return (void *)(uintptr_t)paddr;
+}
+
+static inline phys_addr_t map_to_sysmem(const void *ptr)
+{
+ return (phys_addr_t)(uintptr_t)ptr;
+}
+#endif
+
+static inline void *
+map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
+{
+ return (void *)paddr;
+}
+
+/*
+ * Take down a mapping set up by map_physmem().
+ */
+static inline void unmap_physmem(void *vaddr, unsigned long flags)
+{
+}
+
+static inline phys_addr_t virt_to_phys(void *vaddr)
+{
+ return (phys_addr_t)(vaddr);
+}
+
+/*
+ * Generic virtual read/write. Note that we don't support half-word
+ * read/writes. We define __arch_*[bl] here, and leave __arch_*w
+ * to the architecture specific code.
+ */
+#define __arch_getb(a) (*(unsigned char *)(a))
+#define __arch_getw(a) (*(unsigned short *)(a))
+#define __arch_getl(a) (*(unsigned int *)(a))
+#define __arch_getq(a) (*(unsigned long *)(a))
+
+#define __arch_putb(v, a) (*(unsigned char *)(a) = (v))
+#define __arch_putw(v, a) (*(unsigned short *)(a) = (v))
+#define __arch_putl(v, a) (*(unsigned int *)(a) = (v))
+#define __arch_putq(v, a) (*(unsigned 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)
+
+/*
+ * TODO: The kernel offers some more advanced versions of barriers, it might
+ * have some advantages to use them instead of the simple one here.
+ */
+#define dmb() __asm__ __volatile__ ("" : : : "memory")
+#define __iormb() dmb()
+#define __iowmb() dmb()
+
+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)
+{
+ u32 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)
+
+/*
+ * DMA-consistent mapping functions. These allocate/free a region of
+ * uncached, unwrite-buffered mapped memory space for use with DMA
+ * devices. This is the "generic" version. The PCI specific version
+ * is in pci.h
+ */
+
+/*
+ * String version of IO memory access ops:
+ */
+
+/*
+ * If this architecture has PCI memory IO, then define the read/write
+ * macros. These should only be used with the cookie passed from
+ * ioremap.
+ */
+#ifdef __mem_pci
+
+#define readb(c) ({ unsigned int __v = \
+ __raw_readb(__mem_pci(c)); __v; })
+#define readw(c) ({ unsigned int __v = \
+ le16_to_cpu(__raw_readw(__mem_pci(c))); __v; })
+#define readl(c) ({ unsigned int __v = \
+ le32_to_cpu(__raw_readl(__mem_pci(c))); __v; })
+
+#define writeb(v, c) __raw_writeb(v, __mem_pci(c))
+#define writew(v, c) __raw_writew(cpu_to_le16(v), __mem_pci(c))
+#define writel(v, c) __raw_writel(cpu_to_le32(v), __mem_pci(c))
+
+#define memset_io(c, v, l) _memset_io(__mem_pci(c), (v), (l))
+#define memcpy_fromio(a, c, l) _memcpy_fromio((a), __mem_pci(c), (l))
+#define memcpy_toio(c, a, l) _memcpy_toio(__mem_pci(c), (a), (l))
+
+#define eth_io_copy_and_sum(s, c, l, b) \
+ eth_copy_and_sum((s), __mem_pci(c), (l), (b))
+
+static inline int
+check_signature(unsigned long io_addr, const unsigned char *signature,
+ int length)
+{
+ int retval = 0;
+
+ do {
+ if (readb(io_addr) != *signature)
+ goto out;
+ io_addr++;
+ signature++;
+ length--;
+ } while (length);
+ retval = 1;
+out:
+ return retval;
+}
+#endif /* __mem_pci */
+
+/*
+ * If this architecture has ISA IO, then define the isa_read/isa_write
+ * macros.
+ */
+#ifdef __mem_isa
+
+#define isa_readb(addr) __raw_readb(__mem_isa(addr))
+#define isa_readw(addr) __raw_readw(__mem_isa(addr))
+#define isa_readl(addr) __raw_readl(__mem_isa(addr))
+#define isa_writeb(val, addr) __raw_writeb(val, __mem_isa(addr))
+#define isa_writew(val, addr) __raw_writew(val, __mem_isa(addr))
+#define isa_writel(val, addr) __raw_writel(val, __mem_isa(addr))
+#define isa_memset_io(a, b, c) _memset_io(__mem_isa(a), (b), (c))
+#define isa_memcpy_fromio(a, b, c) _memcpy_fromio((a), __mem_isa(b), (c))
+#define isa_memcpy_toio(a, b, c) _memcpy_toio(__mem_isa((a)), (b), (c))
+
+#define isa_eth_io_copy_and_sum(a, b, c, d) \
+ eth_copy_and_sum((a), __mem_isa(b), (c), (d))
+
+static inline int
+isa_check_signature(unsigned long io_addr, const unsigned char *signature,
+ int length)
+{
+ int retval = 0;
+
+ do {
+ if (isa_readb(io_addr) != *signature)
+ goto out;
+ io_addr++;
+ signature++;
+ length--;
+ } while (length);
+ retval = 1;
+out:
+ return retval;
+}
+
+#else /* __mem_isa */
+
+#define isa_readb(addr) (__readwrite_bug("isa_readb"), 0)
+#define isa_readw(addr) (__readwrite_bug("isa_readw"), 0)
+#define isa_readl(addr) (__readwrite_bug("isa_readl"), 0)
+#define isa_writeb(val, addr) __readwrite_bug("isa_writeb")
+#define isa_writew(val, addr) __readwrite_bug("isa_writew")
+#define isa_writel(val, addr) __readwrite_bug("isa_writel")
+#define isa_memset_io(a, b, c) __readwrite_bug("isa_memset_io")
+#define isa_memcpy_fromio(a, b, c) __readwrite_bug("isa_memcpy_fromio")
+#define isa_memcpy_toio(a, b, c) __readwrite_bug("isa_memcpy_toio")
+
+#define isa_eth_io_copy_and_sum(a, b, c, d) \
+ __readwrite_bug("isa_eth_io_copy_and_sum")
+
+#define isa_check_signature(io, sig, len) (0)
+
+#endif /* __mem_isa */
+#endif /* __KERNEL__ */
+#endif /* __ASM_RISCV_IO_H */
generated by cgit (git 2.34.1) at 2024-12-24 19:44:25 +0000