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firmware: Add fw_dynamic firmware

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This patch provides first-cut implementation of fw_dynamic firmware.

As compared to fw_jump and fw_payload, the fw_dynamic obtains next
address, next mode and OpenSBI options from struct fw_dynamic_info.

The previous booting stage can create struct fw_dynamic_info in memory
and pass address of struct fw_dynamic_info in 'a2' register. Also, the
struct fw_dynamic_info has versioning as well so changes to the struct
fw_dynamic_info can be done in a backward compatible manner.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Anup Patel
2019-04-29 11:55:19 +05:30
committed by Anup Patel
parent 25472de89e
commit bae54f7645
4 changed files with 197 additions and 0 deletions
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2
firmware/objects.mk
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@@ -17,6 +17,8 @@ ifdef FW_TEXT_START
firmware-genflags-y += -DFW_TEXT_START=$(FW_TEXT_START)
endif
firmware-bins-$(FW_DYNAMIC) += fw_dynamic.bin
firmware-bins-$(FW_JUMP) += fw_jump.bin
ifdef FW_JUMP_ADDR
firmware-genflags-$(FW_JUMP) += -DFW_JUMP_ADDR=$(FW_JUMP_ADDR)