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lib: sbi: Add separate entries for firmware RX and RW regions
Add two entries for firmware in the root domain: 1. TEXT: fw_start to _fw_rw_offset with RX permissions 2. DATA: _fw_rw_offset to fw_size with RW permissions These permissions are still not enforced from M-mode but lay the ground work for enforcing them for M-mode. SU-mode don't have any access to these regions. Sample output: Domain0 Region01 : 0x0000000080000000-0x000000008001ffff M: (R,X) S/U: () Domain0 Region02 : 0x0000000080020000-0x000000008003ffff M: (R,W) S/U: () Signed-off-by: Himanshu Chauhan <hchauhan@ventanamicro.com> Reviewed-by: Anup Patel <anup@brainfault.org>
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1 changed files with 22 additions and 2 deletions
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@ -638,12 +638,32 @@ int sbi_domain_init(struct sbi_scratch *scratch, u32 cold_hartid)
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u32 i;
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const struct sbi_platform *plat = sbi_platform_ptr(scratch);
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if (scratch->fw_rw_offset == 0 ||
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(scratch->fw_rw_offset & (scratch->fw_rw_offset - 1)) != 0) {
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sbi_printf("%s: fw_rw_offset is not a power of 2 (0x%lx)\n",
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__func__, scratch->fw_rw_offset);
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return SBI_EINVAL;
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}
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if ((scratch->fw_start & (scratch->fw_rw_offset - 1)) != 0) {
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sbi_printf("%s: fw_start and fw_rw_offset not aligned\n",
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__func__);
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return SBI_EINVAL;
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}
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/* Root domain firmware memory region */
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sbi_domain_memregion_init(scratch->fw_start, scratch->fw_size,
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SBI_DOMAIN_MEMREGION_M_RWX,
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sbi_domain_memregion_init(scratch->fw_start, scratch->fw_rw_offset,
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(SBI_DOMAIN_MEMREGION_M_READABLE |
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SBI_DOMAIN_MEMREGION_M_EXECUTABLE),
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&root_fw_region);
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domain_memregion_initfw(&root_memregs[root_memregs_count++]);
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sbi_domain_memregion_init((scratch->fw_start + scratch->fw_rw_offset),
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(scratch->fw_size - scratch->fw_rw_offset),
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(SBI_DOMAIN_MEMREGION_M_READABLE |
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SBI_DOMAIN_MEMREGION_M_WRITABLE),
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&root_memregs[root_memregs_count++]);
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/* Root domain allow everything memory region */
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sbi_domain_memregion_init(0, ~0UL,
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(SBI_DOMAIN_MEMREGION_READABLE |
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