142 lines
3.6 KiB
C
Executable File
142 lines
3.6 KiB
C
Executable File
/*
|
|
* Copyright (c) 2015, Xilinx Inc. and Contributors. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#include <limits.h>
|
|
#include <metal/errno.h>
|
|
#include <metal/io.h>
|
|
#include <metal/sys.h>
|
|
|
|
void metal_io_init(struct metal_io_region *io, void *virt,
|
|
const metal_phys_addr_t *physmap, size_t size,
|
|
unsigned int page_shift, unsigned int mem_flags,
|
|
const struct metal_io_ops *ops)
|
|
{
|
|
const struct metal_io_ops nops = {
|
|
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
|
|
};
|
|
|
|
io->virt = virt;
|
|
io->physmap = physmap;
|
|
io->size = size;
|
|
io->page_shift = page_shift;
|
|
if (page_shift >= sizeof(io->page_mask) * CHAR_BIT)
|
|
/* avoid overflow */
|
|
io->page_mask = -1UL;
|
|
else
|
|
io->page_mask = (1UL << page_shift) - 1UL;
|
|
io->mem_flags = mem_flags;
|
|
io->ops = ops ? *ops : nops;
|
|
metal_sys_io_mem_map(io);
|
|
}
|
|
|
|
int metal_io_block_read(struct metal_io_region *io, unsigned long offset,
|
|
void *restrict dst, int len)
|
|
{
|
|
unsigned char *ptr = metal_io_virt(io, offset);
|
|
unsigned char *dest = dst;
|
|
int retlen;
|
|
|
|
if (!ptr)
|
|
return -ERANGE;
|
|
if ((offset + len) > io->size)
|
|
len = io->size - offset;
|
|
retlen = len;
|
|
if (io->ops.block_read) {
|
|
retlen = (*io->ops.block_read)(
|
|
io, offset, dst, memory_order_seq_cst, len);
|
|
} else {
|
|
atomic_thread_fence(memory_order_seq_cst);
|
|
while ( len && (
|
|
((uintptr_t)dest % sizeof(int)) ||
|
|
((uintptr_t)ptr % sizeof(int)))) {
|
|
*(unsigned char *)dest =
|
|
*(const unsigned char *)ptr;
|
|
dest++;
|
|
ptr++;
|
|
len--;
|
|
}
|
|
for (; len >= (int)sizeof(int); dest += sizeof(int),
|
|
ptr += sizeof(int),
|
|
len -= sizeof(int))
|
|
*(unsigned int *)dest = *(const unsigned int *)ptr;
|
|
for (; len != 0; dest++, ptr++, len--)
|
|
*(unsigned char *)dest =
|
|
*(const unsigned char *)ptr;
|
|
}
|
|
return retlen;
|
|
}
|
|
|
|
int metal_io_block_write(struct metal_io_region *io, unsigned long offset,
|
|
const void *restrict src, int len)
|
|
{
|
|
unsigned char *ptr = metal_io_virt(io, offset);
|
|
const unsigned char *source = src;
|
|
int retlen;
|
|
|
|
if (!ptr)
|
|
return -ERANGE;
|
|
if ((offset + len) > io->size)
|
|
len = io->size - offset;
|
|
retlen = len;
|
|
if (io->ops.block_write) {
|
|
retlen = (*io->ops.block_write)(
|
|
io, offset, src, memory_order_seq_cst, len);
|
|
} else {
|
|
while ( len && (
|
|
((uintptr_t)ptr % sizeof(int)) ||
|
|
((uintptr_t)source % sizeof(int)))) {
|
|
*(unsigned char *)ptr =
|
|
*(const unsigned char *)source;
|
|
ptr++;
|
|
source++;
|
|
len--;
|
|
}
|
|
for (; len >= (int)sizeof(int); ptr += sizeof(int),
|
|
source += sizeof(int),
|
|
len -= sizeof(int))
|
|
*(unsigned int *)ptr = *(const unsigned int *)source;
|
|
for (; len != 0; ptr++, source++, len--)
|
|
*(unsigned char *)ptr =
|
|
*(const unsigned char *)source;
|
|
atomic_thread_fence(memory_order_seq_cst);
|
|
}
|
|
return retlen;
|
|
}
|
|
|
|
int metal_io_block_set(struct metal_io_region *io, unsigned long offset,
|
|
unsigned char value, int len)
|
|
{
|
|
unsigned char *ptr = metal_io_virt(io, offset);
|
|
int retlen = len;
|
|
|
|
if (!ptr)
|
|
return -ERANGE;
|
|
if ((offset + len) > io->size)
|
|
len = io->size - offset;
|
|
retlen = len;
|
|
if (io->ops.block_set) {
|
|
(*io->ops.block_set)(
|
|
io, offset, value, memory_order_seq_cst, len);
|
|
} else {
|
|
unsigned int cint = value;
|
|
unsigned int i;
|
|
|
|
for (i = 1; i < sizeof(int); i++)
|
|
cint |= ((unsigned int)value << (CHAR_BIT * i));
|
|
|
|
for (; len && ((uintptr_t)ptr % sizeof(int)); ptr++, len--)
|
|
*(unsigned char *)ptr = (unsigned char) value;
|
|
for (; len >= (int)sizeof(int); ptr += sizeof(int),
|
|
len -= sizeof(int))
|
|
*(unsigned int *)ptr = cint;
|
|
for (; len != 0; ptr++, len--)
|
|
*(unsigned char *)ptr = (unsigned char) value;
|
|
atomic_thread_fence(memory_order_seq_cst);
|
|
}
|
|
return retlen;
|
|
}
|
|
|