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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-10-19 GuEe-GUI first version
*/
#include <drivers/ofw_raw.h>
int fdt_add_subnode_possible(void *fdt, int parentoffset, const char *name)
{
int nodeoffset;
if ((nodeoffset = fdt_add_subnode(fdt, parentoffset, name)) < 0)
{
fdt_open_into(fdt, fdt, fdt_totalsize(fdt) + FDT_PADDING_SIZE);
nodeoffset = fdt_add_subnode(fdt, parentoffset, name);
}
return nodeoffset;
}
int fdt_add_mem_rsv_possible(void *fdt, size_t addr, size_t size)
{
int err = 0;
if (fdt_add_mem_rsv(fdt, addr, size) < 0)
{
fdt_open_into(fdt, fdt, fdt_totalsize(fdt) + FDT_PADDING_SIZE);
err = fdt_add_mem_rsv(fdt, addr, size);
}
return err;
}
int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name, uint64_t val, bool is_u64)
{
int err;
if (is_u64)
{
err = fdt_setprop_u64(fdt, nodeoffset, name, val);
}
else
{
err = fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val);
}
return err;
}
#define FDT_RAW_GET_VAL_FLAG(std_type, s, sz) \
int fdt_getprop_##std_type##sz(void *fdt, int nodeoffset, \
const char *name, s##int##sz##_t *out_value, int *lenp) \
{ \
int err = -FDT_ERR_NOTFOUND; \
if (fdt && nodeoffset >= 0 && name && out_value) \
{ \
const fdt##sz##_t *ptr; \
if ((ptr = fdt_getprop(fdt, nodeoffset, name, lenp))) \
{ \
*out_value = fdt##sz##_to_cpu(*ptr); \
err = 0; \
} \
} \
return err; \
}
#define FDT_RAW_GET_VAL(size) \
FDT_RAW_GET_VAL_FLAG(u, u, size) \
FDT_RAW_GET_VAL_FLAG(s, , size)
FDT_RAW_GET_VAL(64)
FDT_RAW_GET_VAL(32)
FDT_RAW_GET_VAL(16)
FDT_RAW_GET_VAL(8)
#undef FDT_RAW_GET_VAL
#undef FDT_RAW_GET_VAL_FLAG
int fdt_io_addr_cells(void *fdt, int nodeoffset)
{
int cells = -1;
int parentoffset = fdt_parent_offset(fdt, nodeoffset);
for (; parentoffset >= 0 ; parentoffset = fdt_parent_offset(fdt, parentoffset))
{
const fdt32_t *cells_tmp = fdt_getprop(fdt, parentoffset, "#address-cells", NULL);
if (cells_tmp)
{
cells = fdt32_to_cpu(*cells_tmp);
}
}
if (cells < 0)
{
cells = fdt_address_cells(fdt, nodeoffset);
}
return cells;
}
int fdt_io_size_cells(void *fdt, int nodeoffset)
{
int cells = -1;
int parentoffset = fdt_parent_offset(fdt, nodeoffset);
for (; parentoffset >= 0 ; parentoffset = fdt_parent_offset(fdt, parentoffset))
{
const fdt32_t *cells_tmp = fdt_getprop(fdt, parentoffset, "#size-cells", NULL);
if (cells_tmp)
{
cells = fdt32_to_cpu(*cells_tmp);
}
}
if (cells < 0)
{
cells = fdt_size_cells(fdt, nodeoffset);
}
return cells;
}
int fdt_install_initrd(void *fdt, char *os_name, size_t initrd_addr, size_t initrd_size)
{
int err = -FDT_ERR_NOTFOUND;
int chosen_offset = -1, root_off = fdt_path_offset(fdt, "/");
if (root_off >= 0)
{
chosen_offset = fdt_subnode_offset(fdt, root_off, "chosen");
if (chosen_offset == -FDT_ERR_NOTFOUND)
{
chosen_offset = fdt_add_subnode_possible(fdt, root_off, "chosen");
}
}
if (chosen_offset >= 0)
{
uint64_t addr, size;
err = 0;
/* Update the entry */
for (int i = fdt_num_mem_rsv(fdt) - 1; i >= 0; --i)
{
fdt_get_mem_rsv(fdt, i, &addr, &size);
if (addr == initrd_addr)
{
fdt_del_mem_rsv(fdt, i);
break;
}
}
/* Add the memory */
if (fdt_add_mem_rsv(fdt, initrd_addr, initrd_size) < 0)
{
/* Move the memory */
fdt_open_into(fdt, fdt, fdt_totalsize(fdt) + FDT_PADDING_SIZE);
if (fdt_add_mem_rsv(fdt, initrd_addr, initrd_size) < 0)
{
err = -FDT_ERR_NOSPACE;
}
}
if (!err)
{
size_t name_len;
char initrd_name[64];
bool is_u64 = (fdt_io_addr_cells(fdt, root_off) == 2);
if (!os_name)
{
os_name = "rt-thread";
}
name_len = strlen(initrd_name);
strncpy(&initrd_name[name_len], ",initrd-start", sizeof(initrd_name) - name_len);
fdt_setprop_uxx(fdt, chosen_offset, initrd_name, initrd_addr, is_u64);
strncpy(&initrd_name[name_len], ",initrd-end", sizeof(initrd_name) - name_len);
fdt_setprop_uxx(fdt, chosen_offset, initrd_name, initrd_addr + initrd_size, is_u64);
}
}
return err;
}
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