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firmware: fw_base: Make builtin DTB available to fw_platform_init()

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Currently, fw_prev_arg1() is called after fw_platform_init() which
caused builtin DTB to be not available to fw_platform_init().

To allow builtin DTB available to fw_platform_init(), we should
call fw_save_info() and fw_prev_arg1() before fw_platform_init().

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Anup Patel 2020-05-23 11:37:15 +05:30 • committed by Anup Patel
parent 30b60401e1
commit 64f140830d
1 changed files with 14 additions and 14 deletions

28
firmware/fw_base.S
View file

@ -177,6 +177,20 @@ _bss_zero:
li s5, (SBI_SCRATCH_SIZE * 2)
add sp, s4, s5
/* Allow main firmware to save info */
MOV_5R s0, a0, s1, a1, s2, a2, s3, a3, s4, a4
call fw_save_info
MOV_5R a0, s0, a1, s1, a2, s2, a3, s3, a4, s4
/* Override previous arg1 */
MOV_3R s0, a0, s1, a1, s2, a2
call fw_prev_arg1
add t1, a0, zero
MOV_3R a0, s0, a1, s1, a2, s2
beqz t1, _prev_arg1_override_done
add a1, t1, zero
_prev_arg1_override_done:
/*
* Initialize platform
* Note: The a0 to a4 registers passed to the
@ -186,11 +200,6 @@ _bss_zero:
call fw_platform_init
MOV_5R a0, s0, a1, s1, a2, s2, a3, s3, a4, s4
/* Allow main firmware to save info */
MOV_5R s0, a0, s1, a1, s2, a2, s3, a3, s4, a4
call fw_save_info
MOV_5R a0, s0, a1, s1, a2, s2, a3, s3, a4, s4
/* Preload HART details
* s7 -> HART Count
* s8 -> HART Stack Size
@ -271,15 +280,6 @@ _scratch_init:
add t1, t1, t2
blt t1, s7, _scratch_init
/* Override previous arg1 */
MOV_3R s0, a0, s1, a1, s2, a2
call fw_prev_arg1
add t1, a0, zero
MOV_3R a0, s0, a1, s1, a2, s2
beqz t1, _prev_arg1_override_done
add a1, t1, zero
_prev_arg1_override_done:
/*
* Relocate Flatened Device Tree (FDT)
* source FDT address = previous arg1