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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright (C) 2022 On-Line Applications Research Corporation (OAR)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <bspopts.h>
#include <bsp/microblaze-fdt-support.h>
#include <bsp/fdt.h>
#include <libfdt.h>
#ifdef BSP_START_COPY_FDT_FROM_U_BOOT
/* use external dtb provided by u-boot */
#include <sys/param.h>
#ifndef BSP_FDT_BLOB_SIZE_MAX
#define BSP_FDT_BLOB_SIZE_MAX 0
#endif
static RTEMS_ALIGNED(8) uint32_t
system_dtb[BSP_FDT_BLOB_SIZE_MAX / sizeof(uint32_t)];
void bsp_fdt_copy(const void *src)
{
const volatile uint32_t *s = (const uint32_t *) src;
uint32_t *d = RTEMS_DECONST(uint32_t *, &system_dtb[0]);
if (s != d) {
size_t m = MIN(sizeof(system_dtb), fdt_totalsize(src));
size_t aligned_size = roundup2(m, CPU_CACHE_LINE_BYTES);
size_t n = (m + sizeof(*d) - 1) / sizeof(*d);
size_t i;
for (i = 0; i < n; ++i) {
d[i] = s[i];
}
rtems_cache_flush_multiple_data_lines(d, aligned_size);
}
}
#endif /* BSP_START_COPY_FDT_FROM_U_BOOT */
#ifdef BSP_MICROBLAZE_FPGA_USE_FDT
#ifndef BSP_START_COPY_FDT_FROM_U_BOOT
/* use internal bsp dtb */
#include BSP_MICROBLAZE_FPGA_DTB_HEADER_PATH
#endif /* BSP_START_COPY_FDT_FROM_U_BOOT */
const void *bsp_fdt_get(void)
{
return system_dtb;
}
uint32_t bsp_fdt_map_intr(const uint32_t *intr, size_t icells)
{
return intr[0];
}
#endif /* BSP_MICROBLAZE_FPGA_USE_FDT */
uint32_t try_get_prop_from_device_tree(
const char *compatible,
const char *prop_name,
uint32_t default_value
)
{
uint32_t value = default_value;
#ifdef BSP_MICROBLAZE_FPGA_USE_FDT
const void *fdt = bsp_fdt_get();
int node = fdt_node_offset_by_compatible( fdt, -1, compatible );
if ( node < 0 ) {
return default_value;
}
const uint32_t *prop = fdt_getprop( fdt, node, prop_name, NULL );
if ( prop == NULL ) {
return default_value;
}
value = fdt32_to_cpu( prop[0] );
#endif /* BSP_MICROBLAZE_FPGA_USE_FDT */
return value;
}
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