Re: [PATCH 2/2] Add MIPS arch support to barebox

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On 6/28/11 2:13 AM, Antony Pavlov wrote:
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
new file mode 100644
index 0000000..10c0fbb
--- /dev/null
+++ b/arch/mips/Kconfig
@@ -0,0 +1,55 @@
[...]
+source arch/mips/mach-qemu/Kconfig
+
+choice
+	prompt "Bring up type"
+
+	config MIPS_NATIVE_BRINGUP
+		bool "native"
+		help
+		   Barebox will act as a native bootloader. This includes all the
+		   required initialization needed to bring up a piece of hardware.
+
+endchoice

Native bringup / native bootloader should be replaced with
something more appropriate or descriptive.

+source arch/mips/boot/Kconfig
+
+source common/Kconfig
+source commands/Kconfig
+source net/Kconfig
+source drivers/Kconfig
+source fs/Kconfig
+source lib/Kconfig
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
new file mode 100644
index 0000000..60d88e5
--- /dev/null
+++ b/arch/mips/Makefile
@@ -0,0 +1,51 @@
+CPPFLAGS += -D__MIPS__ -fno-strict-aliasing -fno-merge-constants
+
+CPPFLAGS += -march=mips64 -P -EB -mno-abicalls
+CPPFLAGS += -Wall -Wmissing-prototypes -Wstrict-prototypes \
+	    -Wno-uninitialized -Wno-format -Wno-main
+#CPPFLAGS += -save-temps

it's good thing to take 64-bit support into account from the beginning.

diff --git a/arch/mips/boot/entry.c b/arch/mips/boot/entry.c
new file mode 100644
index 0000000..98d954e
--- /dev/null
+++ b/arch/mips/boot/entry.c
@@ -0,0 +1,80 @@
+/*
+ * (C) Copyright 2000-2006
+ * Wolfgang Denk, DENX Software Engineering, wd@xxxxxxx.

Which part in this file belongs to Wolfgang?  I don't see any, and
recommend you to replace with yours.

+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include<debug_ll.h>
+#include<common.h>
+#include<init.h>
+#include<asm-generic/memory_layout.h>
+
+#include<asm/io.h>
+
+#include<string.h>
+
+/* These symbols are generated by the linker */
+extern long __bss_start;
+extern long __bss_end;
+
+extern void start_barebox(void);
+
+/************************************************************************
+ *
+ * This is the first part of the initialization sequence: we are now
+ * running from ROM.
+ *
+ ************************************************************************
+ */
+
+void board_init_in_rom(void *rom, void *ram)
+{
+	int i;
+	int * a, *b;
+#define ROM_SIZE	512 * 1024
+
+	a = rom;
+	b = ram;
+
+	for (i = ROM_SIZE; i>  0; i-=sizeof(int)) {
+		*b = *a;
+		a++;
+		b++;
+	}
+}
+
+/************************************************************************
+ *
+ * This is the next part if the initialization sequence: we are now
+ * running from RAM and have a "normal" C environment, i. e. global
+ * data can be written, BSS has been cleared, the stack size in not
+ * that critical any more, etc.
+ *
+ ************************************************************************
+ */
+
+void board_init_in_ram()
+{
+	/* clear the BSS first */
+	memset(&__bss_start, 0x00,&__bss_end -&__bss_start);
+
+	/* Initialization complete - start the monitor */
+	start_barebox();
+}
diff --git a/arch/mips/boot/head.S b/arch/mips/boot/head.S
new file mode 100644
index 0000000..f5712b8
--- /dev/null
+++ b/arch/mips/boot/head.S
@@ -0,0 +1,233 @@
+/*
+ * Startup Code for MIPS32 CPU-core
+ *
+ * Copyright (c) 2003	Wolfgang Denk<wd@xxxxxxx>
+ * Further modifications by Antony Pavlov

Hmm, not really, and stopped reviewing here.  I might be able to
give a thorough review, but don't have any spare time these days.


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