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From: Antony Pavlov <antonynpavlov@gmail.com>
To: barebox@lists.infradead.org
Subject: [RFC 2/7] MIPS: add the initial support for lowlevel init
Date: Fri, 20 Jul 2012 12:47:34 +0400	[thread overview]
Message-ID: <1342774059-2169-3-git-send-email-antonynpavlov@gmail.com> (raw)
In-Reply-To: <1342774059-2169-1-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 10f7691..238e2c4 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:[~2012-07-20  8:48 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-07-20  8:47 [WIP] add very basic ELF support on MIPS Antony Pavlov
2012-07-20  8:47 ` [RFC 1/7] MIPS: move start.S code to .text_entry section Antony Pavlov
2012-07-20  8:47 ` Antony Pavlov [this message]
2012-07-20  8:47 ` [RFC 3/7] MIPS: malta: add bogus lowlevel init Antony Pavlov
2012-07-20  8:47 ` [RFC 4/7] MIPS: malta: add YAMON-style GT64120 memory map Antony Pavlov
2012-07-20 10:01   ` Antony Pavlov
2012-07-20  8:47 ` [RFC 5/7] MIPS: malta: make KSEG0 uncached Antony Pavlov
2012-07-20  8:47 ` [RFC 6/7] MIPS: qemu-malta: add KSEG0 memory region Antony Pavlov
2012-07-20  8:47 ` [RFC 7/7] bootm: add very basic ELF support on MIPS (stealed from kexec) Antony Pavlov

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