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firmware: Improve comments for fw_prev_arg1() and fw_next_arg1()

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The state of a0, a1, and a2 registers in fw_prev_arg1() and
fw_next_arg1() is same as passed by previous booting stage
so we add this info in comments for both these functions.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
This commit is contained in:
Anup Patel
2019-12-27 08:54:24 +05:30
committed by Anup Patel
parent c7d1b12199
commit 9beb57362f
3 changed files with 12 additions and 0 deletions
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4
firmware/fw_dynamic.S
View File

@@ -91,6 +91,8 @@ fw_save_info:
.global fw_prev_arg1 .global fw_prev_arg1
/* /*
* We can only use a0, a1, and a2 registers here. * We can only use a0, a1, and a2 registers here.
* The a0, a1, and a2 registers will be same as passed by
* previous booting stage.
* The previous arg1 should be returned in 'a0'. * The previous arg1 should be returned in 'a0'.
*/ */
fw_prev_arg1: fw_prev_arg1:
@@ -102,6 +104,8 @@ fw_prev_arg1:
.global fw_next_arg1 .global fw_next_arg1
/* /*
* We can only use a0, a1, and a2 registers here. * We can only use a0, a1, and a2 registers here.
* The a0, a1, and a2 registers will be same as passed by
* previous booting stage.
* The next arg1 should be returned in 'a0'. * The next arg1 should be returned in 'a0'.
*/ */
fw_next_arg1: fw_next_arg1:

4
firmware/fw_jump.S
View File

@@ -39,6 +39,8 @@ fw_save_info:
.global fw_prev_arg1 .global fw_prev_arg1
/* /*
* We can only use a0, a1, and a2 registers here. * We can only use a0, a1, and a2 registers here.
* The a0, a1, and a2 registers will be same as passed by
* previous booting stage.
* The previous arg1 should be returned in 'a0'. * The previous arg1 should be returned in 'a0'.
*/ */
fw_prev_arg1: fw_prev_arg1:
@@ -50,6 +52,8 @@ fw_prev_arg1:
.global fw_next_arg1 .global fw_next_arg1
/* /*
* We can only use a0, a1, and a2 registers here. * We can only use a0, a1, and a2 registers here.
* The a0, a1, and a2 registers will be same as passed by
* previous booting stage.
* The next arg1 should be returned in 'a0'. * The next arg1 should be returned in 'a0'.
*/ */
fw_next_arg1: fw_next_arg1:

4
firmware/fw_payload.S
View File

@@ -39,6 +39,8 @@ fw_save_info:
.global fw_prev_arg1 .global fw_prev_arg1
/* /*
* We can only use a0, a1, and a2 registers here. * We can only use a0, a1, and a2 registers here.
* The a0, a1, and a2 registers will be same as passed by
* previous booting stage.
* The previous arg1 should be returned in 'a0'. * The previous arg1 should be returned in 'a0'.
*/ */
fw_prev_arg1: fw_prev_arg1:
@@ -54,6 +56,8 @@ fw_prev_arg1:
.global fw_next_arg1 .global fw_next_arg1
/* /*
* We can only use a0, a1, and a2 registers here. * We can only use a0, a1, and a2 registers here.
* The a0, a1, and a2 registers will be same as passed by
* previous booting stage.
* The next arg1 should be returned in 'a0'. * The next arg1 should be returned in 'a0'.
*/ */
fw_next_arg1: fw_next_arg1: