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| author | Yu Chien Peter Lin <peterlin@andestech.com> | 2024-07-24 23:00:54 +0800 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2024-08-23 14:17:29 +0530 |
| commit | 56183ca609aa72a075d96d23eebe3df7fbaf53cd (patch) | |
| tree | 075ebc7ea9d8a007d278fe7eb0d2735433d4a649 /docs | |
| parent | 3d1f53b1732dee047bef053fd25aa7b57051b47c (diff) | |
| download | opensbi-56183ca609aa72a075d96d23eebe3df7fbaf53cd.zip opensbi-56183ca609aa72a075d96d23eebe3df7fbaf53cd.tar.gz opensbi-56183ca609aa72a075d96d23eebe3df7fbaf53cd.tar.bz2 | |
lib: utils: fdt_domain: Use consistent device-tree address when next-arg1 is missing
The diagram shown below illustrates the boot-flow involving OP-TEE OS
initialization.
(1)-----------+
| U-Boot SPL |
+------------+
|
v
(2)-------------------------------------------------------------+
| OpenSBI (fw_dynamic) |
| (4)------------------------+ |
| | optee dispatcher driver | |
+-----------------+-------^---------|-------+------------------+
M-mode | | |
---------+--[trusted domain]---+----.----+--[untrusted domain]-------
S-mode | (coldboot domain) | | |
v | | v
(3)---------------------------+ |(5)----------------------------+
| OP-TEE OS | | | U-Boot |
+----------------------------+ | +-----------------------------+
| |
| v
|(6)----------------------------+
| | Linux |
| +-----------------------------+
As OP-TEE OS has device-tree node fixups that need to be passed
through to the next boot stages, e.g. the reserved memory node:
reserved-memory {
#address-cells = <2>;
#size-cells = <2>;
ranges;
optee_core@f1000000 {
no-map;
reg = <0x0 0xf1000000 // OP-TEE OS base address
0x0 0x01000000>;
};
<...>
};
Instead of using 0x0 as the default value, allow identical next-arg1
to be used by non-coldboot domain (i.e., untrusted domain) when the
property is not provided.
Also, update the description of next-arg1 property in the document.
Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Alvin Chang <alvinga@andestech.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/domain_support.md | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/docs/domain_support.md b/docs/domain_support.md index b34e43a..1a40068 100644 --- a/docs/domain_support.md +++ b/docs/domain_support.md @@ -180,9 +180,7 @@ The DT properties of a domain instance DT node are as follows: boot HART of the domain instance. * **next-arg1** (Optional) - The 64 bit next booting stage arg1 for the domain instance. If this DT property is not available and coldboot HART - is not assigned to the domain instance then **0x0** is used as default - value. If this DT property is not available and coldboot HART is assigned - to the domain instance then **next booting stage arg1 of coldboot HART** + is not assigned to the domain instance then **next booting stage arg1 of coldboot HART** is used as default value. * **next-addr** (Optional) - The 64 bit next booting stage address for the domain instance. If this DT property is not available and coldboot HART |