diff options
| author | Rick Chen <rick@andestech.com> | 2018-03-29 10:08:33 +0800 |
|---|---|---|
| committer | Andes <uboot@andestech.com> | 2018-03-30 13:13:56 +0800 |
| commit | d58717e42559189a226ea800173147399c8edef9 (patch) | |
| tree | a94bffe91400f0486571454a3db56733899c4c7e | |
| parent | 2bc5bea9e160c7efe5a268a55b440ac8cf848b48 (diff) | |
riscv: ae250: Support DT provided by the board at runtime
Enable CONFIG_OF_BOAD to support delivery dtb to u-boot
at run time instead of embedded.
There are two methods to delivery dtb.
1 Pass from loader:
When u-boot boot from RAM, gdb or loader can pass dtb
via a2 to u-boot dynamically. Of course gdb or loader
shall be in charge of dtb delivery.
2 Configure CONFIG_SYS_FDT_BASE:
It can be configured as RAM or ROM base statically,
no mater u-boot boot from RAM or ROM.
If it was configured as ROM base, dtb can be burned
into ROM(spi flash) by spi driver.
Meanwhile remove CONFIG_SKIP_LOWLEVEL_INIT which is
useless in nx25-ae250 configuration.
Signed-off-by: Rick Chen <rick@andestech.com>
Signed-off-by: Rick Chen <rickchen36@gmail.com>
Cc: Greentime Hu <green.hu@gmail.com>
| -rw-r--r-- | arch/riscv/cpu/nx25/start.S | 2 | ||||
| -rw-r--r-- | board/AndesTech/nx25-ae250/nx25-ae250.c | 9 | ||||
| -rw-r--r-- | configs/nx25-ae250_defconfig | 1 | ||||
| -rw-r--r-- | include/configs/nx25-ae250.h | 12 |
4 files changed, 15 insertions, 9 deletions
diff --git a/arch/riscv/cpu/nx25/start.S b/arch/riscv/cpu/nx25/start.S index 6a076639d3..cd0a66360d 100644 --- a/arch/riscv/cpu/nx25/start.S +++ b/arch/riscv/cpu/nx25/start.S @@ -45,6 +45,8 @@ trap_vector: .global trap_entry handle_reset: + li t0, CONFIG_SYS_SDRAM_BASE + SREG a2, 0(t0) la t0, trap_entry csrw mtvec, t0 csrwi mstatus, 0 diff --git a/board/AndesTech/nx25-ae250/nx25-ae250.c b/board/AndesTech/nx25-ae250/nx25-ae250.c index a965218f34..6e31be3505 100644 --- a/board/AndesTech/nx25-ae250/nx25-ae250.c +++ b/board/AndesTech/nx25-ae250/nx25-ae250.c @@ -64,3 +64,12 @@ ulong board_flash_get_legacy(ulong base, int banknum, flash_info_t *info) { return 0; } + +void *board_fdt_blob_setup(void) +{ + void **ptr = (void *)CONFIG_SYS_SDRAM_BASE; + if (fdt_magic(*ptr) == FDT_MAGIC) + return (void *)*ptr; + + return (void *)CONFIG_SYS_FDT_BASE; +} diff --git a/configs/nx25-ae250_defconfig b/configs/nx25-ae250_defconfig index eb41d71357..4f9bd58f75 100644 --- a/configs/nx25-ae250_defconfig +++ b/configs/nx25-ae250_defconfig @@ -16,6 +16,7 @@ CONFIG_CMD_CACHE=y CONFIG_CMD_EXT2=y CONFIG_CMD_FAT=y CONFIG_OF_CONTROL=y +CONFIG_OF_BOARD=y CONFIG_ENV_IS_IN_SPI_FLASH=y CONFIG_NET_RANDOM_ETHADDR=y CONFIG_DM=y diff --git a/include/configs/nx25-ae250.h b/include/configs/nx25-ae250.h index 3c888fdd50..0e4c431cab 100644 --- a/include/configs/nx25-ae250.h +++ b/include/configs/nx25-ae250.h @@ -11,18 +11,9 @@ /* * CPU and Board Configuration Options */ -#define CONFIG_SKIP_LOWLEVEL_INIT - #define CONFIG_BOOTP_SEND_HOSTNAME #define CONFIG_BOOTP_SERVERIP -#ifdef CONFIG_SKIP_LOWLEVEL_INIT -#ifdef CONFIG_OF_CONTROL -#undef CONFIG_OF_SEPARATE -#define CONFIG_OF_EMBED -#endif -#endif - /* * Miscellaneous configurable options */ @@ -50,6 +41,9 @@ */ #define CONFIG_SYS_MALLOC_LEN (512 << 10) +/* DT blob (fdt) address */ +#define CONFIG_SYS_FDT_BASE 0x000f0000 + /* * Physical Memory Map */ |