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firmware: Add preferred boot HART field in struct fw_dynamic_info

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It has been reported that link address range of previous booting stage
(such as U-Boot SPL) can overlap the link address rage of FW_DYNAMIC.

This means self-relocation in FW_DYNAMIC can potentially corrupt
previous booting stage if any of the secondary HART enter FW_DYNAMIC
before primary HART.

To tackle this, we add preferred boot HART field (i.e boot_hart) in
struct fw_dyanmic_info. We use this field to force secondary HARTs
into relocation wait loop till preferred/primary boot HART enters
FW_DYNAMIC completes self-relocation. If preferred boot HART is not
available then we fall back to relocation lottery approach.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Anup Patel
2019-11-06 16:24:35 +05:30
committed by Anup Patel
parent 18897aaf5d
commit 7a13beb213
5 changed files with 100 additions and 4 deletions
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13
firmware/fw_payload.S
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@@ -9,6 +9,19 @@
#include "fw_base.S"
.align 3
.section .entry, "ax", %progbits
.global fw_boot_hart
/*
* This function is called very early even before
* fw_save_info() is called.
* We can only use a0, a1, and a2 registers here.
* The boot HART id should be returned in 'a0'.
*/
fw_boot_hart:
li a0, -1
ret
.align 3
.section .entry, "ax", %progbits
.global fw_save_info