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board: rock5b-rk3588: add memory gaps into kernel's DTB

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RK3588 has two memory gaps when using 16 GiB DRAM size:
[0x3fc000000 , 0x3fc500000]
and
[0x3fff00000 , 0x3ffffffff]

If the kernel is agnostic to these gaps, accessing the area causes
a SError panic.

Hence, add reserved memory areas in kernel's DTB before booting.

Signed-off-by: Eugen Hristev <eugen.hristev@collabora.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
This commit is contained in:
Eugen Hristev 2023-02-22 11:05:13 +02:00 committed by Kever Yang
parent 3bf8e40807
commit a6e85a35b5
2 changed files with 36 additions and 0 deletions
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35
board/radxa/rock5b-rk3588/rock5b-rk3588.c
View file

@ -2,3 +2,38 @@
/*
* Copyright (c) 2023 Collabora Ltd.
*/
#include <fdtdec.h>
#include <fdt_support.h>
#ifdef CONFIG_OF_BOARD_SETUP
int rock5b_add_reserved_memory_fdt_nodes(void *new_blob)
{
struct fdt_memory gap1 = {
.start = 0x3fc000000,
.end = 0x3fc4fffff,
};
struct fdt_memory gap2 = {
.start = 0x3fff00000,
.end = 0x3ffffffff,
};
unsigned long flags = FDTDEC_RESERVED_MEMORY_NO_MAP;
unsigned int ret;
/*
* Inject the reserved-memory nodes into the DTS
*/
ret = fdtdec_add_reserved_memory(new_blob, "gap1", &gap1, NULL, 0,
NULL, flags);
if (ret)
return ret;
return fdtdec_add_reserved_memory(new_blob, "gap2", &gap2, NULL, 0,
NULL, flags);
}
int ft_board_setup(void *blob, struct bd_info *bd)
{
return rock5b_add_reserved_memory_fdt_nodes(blob);
}
#endif

1
configs/rock5b-rk3588_defconfig
View file

@ -26,6 +26,7 @@ CONFIG_FIT=y
CONFIG_FIT_VERBOSE=y
CONFIG_SPL_FIT_SIGNATURE=y
CONFIG_SPL_LOAD_FIT=y
CONFIG_OF_BOARD_SETUP=y
CONFIG_DEFAULT_FDT_FILE="rockchip/rk3588-rock-5b.dtb"
# CONFIG_DISPLAY_CPUINFO is not set
CONFIG_DISPLAY_BOARDINFO_LATE=y