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soc: lowrisc: opentitan: Fix manifest sizing

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The actual manifest is 1024 bytes, but we previously had padding bytes
due to the implementation of SECTION_FUNC(). The manifest is not
executable code so SECTION_VAR() is appropriate and produces a section of
the appropriate size.

Fixes: #82822

Signed-off-by: Shawn Nematbakhsh <shawn@rivosinc.com>
This commit is contained in:
Shawn Nematbakhsh 2025-01-17 08:58:49 -08:00 • committed by Benjamin Cabé
commit c8e9da2615
2 changed files with 2 additions and 2 deletions
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2
soc/lowrisc/opentitan/Kconfig.defconfig
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@ -21,6 +21,6 @@ config NUM_IRQS
# The OpenTitan SoC requires a manifest in front of the # The OpenTitan SoC requires a manifest in front of the
# application binary. # application binary.
config ROM_START_OFFSET config ROM_START_OFFSET
default 0x404 default 0x400
endif # SOC_OPENTITAN endif # SOC_OPENTITAN

2
soc/lowrisc/opentitan/rom_header.S
View file

@ -17,7 +17,7 @@ GTEXT(__rom_header)
* 0x6c47 (minor). The manifest format is documented here: * 0x6c47 (minor). The manifest format is documented here:
* https://github.com/lowRISC/opentitan/blob/689a163294e1791bd30cfe096decf7f9233abad4/sw/host/opentitanlib/src/image/manifest.rs#L205 * https://github.com/lowRISC/opentitan/blob/689a163294e1791bd30cfe096decf7f9233abad4/sw/host/opentitanlib/src/image/manifest.rs#L205
*/ */
SECTION_FUNC(rom_header, __rom_header) SECTION_VAR(rom_header, __rom_header)
.rept(225) .rept(225)
.word 0 .word 0
.endr .endr