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From: Antony Pavlov <antonynpavlov@gmail.com>
To: barebox@lists.infradead.org
Subject: [RFC 2/3] MIPS: add the initial support for lowlevel init
Date: Sun, 13 May 2012 21:24:43 +0400	[thread overview]
Message-ID: <1336929884-19292-3-git-send-email-antonynpavlov@gmail.com> (raw)
In-Reply-To: <1336929884-19292-1-git-send-email-antonynpavlov@gmail.com>

This commit introduce the initial support for
machine specific lowlevel initialization
(e.g. RAM controller or cache memory).

To return from mach_init_lowlevel() it uses
explicit mach_init_lowlevel_return label.
This saves ra register for using inside mach_init_lowlevel()

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
---
 arch/mips/boot/start.S |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/mips/boot/start.S b/arch/mips/boot/start.S
index 6bf5baa..6db104b 100644
--- a/arch/mips/boot/start.S
+++ b/arch/mips/boot/start.S
@@ -74,6 +74,14 @@ __start:
 	and	k0, k1
 	mtc0	k0, CP0_STATUS
 
+#ifdef CONFIG_MACH_DO_LOWLEVEL_INIT
+	b	mach_init_lowlevel
+	 nop
+
+mach_init_lowlevel_return:
+EXPORT(mach_init_lowlevel_return)
+#endif
+
 	/* copy barebox to link location */
 	ADR	a0, _start, t1	/* a0 <- pc-relative position of _start */
 
-- 
1.7.10


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  parent reply	other threads:[~2012-05-13 17:24 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-05-13 17:24 [RFC 0/3] " Antony Pavlov
2012-05-13 17:24 ` [RFC 1/3] MIPS: move start.S code to .text_entry section Antony Pavlov
2012-05-13 17:24 ` Antony Pavlov [this message]
2012-05-14  8:55   ` [RFC 2/3] MIPS: add the initial support for lowlevel init Sascha Hauer
2012-05-14  9:13     ` Antony Pavlov
2012-05-13 17:24 ` [RFC 3/3] MIPS: malta: add bogus " Antony Pavlov
2012-05-14  8:18 ` [RFC 0/3] MIPS: add the initial support for " Sascha Hauer
2012-05-14  8:28   ` Antony Pavlov

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