diff options
| author | Himanshu Chauhan <hchauhan@ventanamicro.com> | 2023-01-19 18:18:22 +0300 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2023-01-23 07:36:14 +0300 |
| commit | fefa5488038584a6376a8f361e74ccc2183dd50b (patch) | |
| tree | 28820c8d36a8d4029aceb2c7889de2a8d6bee3d6 /firmware | |
| parent | a990309fa362aa050caf7fb175f35c7bfa486ccc (diff) | |
| download | opensbi-fefa5488038584a6376a8f361e74ccc2183dd50b.tar.xz | |
firmware: Split RO/RX and RW sections
Split the RO/RX and RW sections so that they can have
independent pmp entries with required permissions. The
split size is ensured to be a power-of-2 as required by
pmp.
_fw_rw_offset symbol marks the beginning of the data
section.
Signed-off-by: Himanshu Chauhan <hchauhan@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Diffstat (limited to 'firmware')
| -rw-r--r-- | firmware/fw_base.ldS | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/firmware/fw_base.ldS b/firmware/fw_base.ldS index 563ae25..5411bbd 100644 --- a/firmware/fw_base.ldS +++ b/firmware/fw_base.ldS @@ -42,6 +42,14 @@ . = ALIGN(0x1000); /* Ensure next section is page aligned */ + /* + * PMP regions must be to be power-of-2. RO/RW will have separate + * regions, so ensure that the split is power-of-2. + */ + . = ALIGN(1 << LOG2CEIL(SIZEOF(.rodata) + SIZEOF(.text))); + + PROVIDE(_fw_rw_offset = (. - _fw_start)); + /* Beginning of the read-write data sections */ .data : |