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firmware: Add common FW_FDT_PATH compile-time option
Currently, only FW_PAYLOAD has mechanism to embed external FDT using FW_PAYLOAD_FDT_PATH compile-time option. This patch adds a common FW_FDT_PATH compile-time option to embed external FDT for all OpenSBI firmwares (i.e FW_JUMP, FW_PAYLOAD, and FW_DYNAMIC). Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
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4 changed files with 37 additions and 4 deletions
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@ -51,11 +51,17 @@ case, a *FW_PAYLOAD* firmware allows embedding a flattened device tree in the
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Firmware Configuration and Compilation
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--------------------------------------
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All firmware types mandate the definition of the following compile time
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configuration parameter.
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All firmware types support the following common compile time configuration
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parameters:
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* **FW_TEXT_ADDR** - Defines the address at which the previous booting stage
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loads OpenSBI firmware.
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* **FW_TEXT_ADDR** - Defines the execution address of the OpenSBI firmware.
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This configuration parameter is mandatory.
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* **FW_FDT_PATH** - Path to an external flattened device tree binary file to
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be embedded in the *.rodata* section of the final firmware. If this option
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is not provided then the firmware will expect the FDT to be passed as an
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argument by the prior booting stage.
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* **FW_FDT_PADDING** - Optional zero bytes padding to the embedded flattened
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device tree binary file specified by **FW_FDT_PATH** option.
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Additionally, each firmware type as a set of type specific configuration
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parameters. Detailed information for each firmware type can be found in the
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@ -7,5 +7,9 @@
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# Anup Patel <anup.patel@wdc.com>
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#
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$(platform_build_dir)/firmware/fw_dynamic.o: $(FW_FDT_PATH)
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$(platform_build_dir)/firmware/fw_jump.o: $(FW_FDT_PATH)
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$(platform_build_dir)/firmware/fw_payload.o: $(FW_FDT_PATH)
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$(platform_build_dir)/firmware/fw_payload.o: $(FW_PAYLOAD_PATH_FINAL)
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$(platform_build_dir)/firmware/fw_payload.o: $(FW_PAYLOAD_FDT_PATH)
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@ -182,6 +182,11 @@ _bss_zero:
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call fw_save_info
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MOV_5R a0, s0, a1, s1, a2, s2, a3, s3, a4, s4
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#ifdef FW_FDT_PATH
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/* Override previous arg1 */
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la a1, fw_fdt_bin
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#endif
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/* Override previous arg1 */
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MOV_3R s0, a0, s1, a1, s2, a2
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call fw_prev_arg1
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@ -668,3 +673,14 @@ _reset_regs:
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csrw CSR_MSCRATCH, 0
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ret
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#ifdef FW_FDT_PATH
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.section .rodata
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.align 4
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.globl fw_fdt_bin
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fw_fdt_bin:
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.incbin FW_FDT_PATH
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#ifdef FW_FDT_PADDING
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.fill FW_FDT_PADDING, 1, 0
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#endif
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#endif
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@ -17,6 +17,13 @@ ifdef FW_TEXT_START
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firmware-genflags-y += -DFW_TEXT_START=$(FW_TEXT_START)
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endif
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ifdef FW_FDT_PATH
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firmware-genflags-y += -DFW_FDT_PATH=\"$(FW_FDT_PATH)\"
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ifdef FW_FDT_PADDING
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firmware-genflags-y += -DFW_FDT_PADDING=$(FW_FDT_PADDING)
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endif
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endif
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firmware-bins-$(FW_DYNAMIC) += fw_dynamic.bin
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firmware-bins-$(FW_JUMP) += fw_jump.bin
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