diff options
| author | Atish Patra <atish.patra@wdc.com> | 2020-04-21 11:15:01 -0700 |
|---|---|---|
| committer | Andes <uboot@andestech.com> | 2020-04-23 10:14:16 +0800 |
| commit | d4ea649f179a69edd2cf2dd96efb9337205eb015 (patch) | |
| tree | 42bd3450a19f02aafa85e7c4fff2d3fdadcc903c /arch/riscv/include/asm | |
| parent | f614753c4b91bc3b56809773aeb17da10f1231a5 (diff) | |
riscv: Provide a mechanism to fix DT for reserved memory
In RISC-V, M-mode software can reserve physical memory regions
by setting appropriate physical memory protection (PMP) csr. As the
PMP csr are accessible only in M-mode, S-mode U-Boot can not read
this configuration directly. However, M-mode software can pass this
information via reserved-memory node in device tree so that S-mode
software can access this information.
This patch provides a framework to copy to the reserved-memory node
from one DT to another. This will be used to update the DT used by
U-Boot and the DT passed to the next stage OS.
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'arch/riscv/include/asm')
| -rw-r--r-- | arch/riscv/include/asm/global_data.h | 1 | ||||
| -rw-r--r-- | arch/riscv/include/asm/u-boot-riscv.h | 2 |
2 files changed, 3 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/global_data.h b/arch/riscv/include/asm/global_data.h index 72fb4b4d92..6c50149218 100644 --- a/arch/riscv/include/asm/global_data.h +++ b/arch/riscv/include/asm/global_data.h @@ -15,6 +15,7 @@ /* Architecture-specific global data */ struct arch_global_data { long boot_hart; /* boot hart id */ + phys_addr_t firmware_fdt_addr; #ifdef CONFIG_SIFIVE_CLINT void __iomem *clint; /* clint base address */ #endif diff --git a/arch/riscv/include/asm/u-boot-riscv.h b/arch/riscv/include/asm/u-boot-riscv.h index 49febd5881..543a1688db 100644 --- a/arch/riscv/include/asm/u-boot-riscv.h +++ b/arch/riscv/include/asm/u-boot-riscv.h @@ -17,5 +17,7 @@ int cleanup_before_linux(void); /* board/.../... */ int board_init(void); void board_quiesce_devices(void); +int riscv_board_reserved_mem_fixup(void *fdt); +int riscv_fdt_copy_resv_mem_node(const void *src_fdt, void *dest_fdt); #endif /* _U_BOOT_RISCV_H_ */ |