From: Oleksij Rempel <o.rempel@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Oleksij Rempel <o.rempel@pengutronix.de>
Subject: [PATCH v3 04/10] MIPS: start: preserve DTB pointer for later use
Date: Tue, 27 Nov 2018 10:19:29 +0100 [thread overview]
Message-ID: <20181127091935.2992-5-o.rempel@pengutronix.de> (raw)
In-Reply-To: <20181127091935.2992-1-o.rempel@pengutronix.de>
We will get DTB pointer in a0 register. Since a0 is used as argument by
other functions, we need to preserve it and then pass as argument to the
main_entry().
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
arch/mips/boot/start.S | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/mips/boot/start.S b/arch/mips/boot/start.S
index e937e89af1..39ac9414d8 100644
--- a/arch/mips/boot/start.S
+++ b/arch/mips/boot/start.S
@@ -27,6 +27,10 @@ EXPORT(_start)
mips_barebox_10h
+ /* save dtb pointer */
+ move s0, a0
+ move s1, a1
+
/* disable watchpoints */
mtc0 zero, CP0_WATCHLO
mtc0 zero, CP0_WATCHHI
@@ -37,6 +41,9 @@ EXPORT(_start)
stack_setup
+ /* restore dtb pointer */
+ move a0, s0
+ move a1, s1
la v0, main_entry
jal v0
nop
--
2.19.1
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next prev parent reply other threads:[~2018-11-27 9:19 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-27 9:19 [PATCH v3 00/10] MIPS: migrate to multiimage support Oleksij Rempel
2018-11-27 9:19 ` [PATCH v3 01/10] images: piggy: use "a" instead of #alloc flag Oleksij Rempel
2018-11-27 9:19 ` [PATCH v3 02/10] MIPS: add arch/mips/lib/pbl.lds.S Oleksij Rempel
2018-11-30 7:41 ` Sascha Hauer
2018-11-27 9:19 ` [PATCH v3 03/10] pbl: enable MIPS for PBL_RELOCATABLE Oleksij Rempel
2018-11-27 9:19 ` Oleksij Rempel [this message]
2018-11-27 9:19 ` [PATCH v3 05/10] MIPS: multiimage: add ENTRY_FUNCTION macros Oleksij Rempel
2018-11-27 9:19 ` [PATCH v3 06/10] MIPS: mutliimage: pass devicetree from PBL to the main_entry Oleksij Rempel
2018-11-27 9:19 ` [PATCH v3 07/10] MIPS: put main_entry to __bare_init section Oleksij Rempel
2018-11-27 9:19 ` [PATCH v3 08/10] MIPS: port all mach* to multiimage Oleksij Rempel
2018-12-05 8:50 ` Antony Pavlov
2018-12-05 13:58 ` Oleksij Rempel
2018-12-06 9:15 ` Sascha Hauer
2018-12-07 7:09 ` Oleksij Rempel
2018-12-11 11:31 ` Antony Pavlov
2018-12-13 7:10 ` Sascha Hauer
2018-11-27 9:19 ` [PATCH v3 09/10] MIPS: remove HAS_NO_BOARD_HL_CODE support Oleksij Rempel
2018-11-27 9:19 ` [PATCH v3 10/10] MIPS: remove useless board files Oleksij Rempel
2018-11-30 7:46 ` [PATCH v3 00/10] MIPS: migrate to multiimage support Sascha Hauer
2018-11-30 9:41 ` Antony Pavlov
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