MIPS: Add initial support for the Atheros AR71XX/AR724X/AR931X SoCs
This patch adds initial support for various Atheros SoCs based on the
MIPS 24Kc core. The following models are supported at the moment:
- AR7130
- AR7141
- AR7161
- AR9130
- AR9132
- AR7240
- AR7241
- AR7242
The current patch contains minimal support only, but the resulting
kernel can boot into user-space with using of an initramfs image on
various boards which are using these SoCs. Support for more built-in
devices and individual boards will be implemented in further patches.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: Luis R. Rodriguez <lrodriguez@atheros.com>
Cc: Cliff Holden <Cliff.Holden@Atheros.com>
Cc: Kathy Giori <Kathy.Giori@Atheros.com>
Patchwork: https://patchwork.linux-mips.org/patch/1947/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/ath79/prom.c b/arch/mips/ath79/prom.c
new file mode 100644
index 0000000..e9cbd7c
--- /dev/null
+++ b/arch/mips/ath79/prom.c
@@ -0,0 +1,57 @@
+/*
+ * Atheros AR71XX/AR724X/AR913X specific prom routines
+ *
+ * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/string.h>
+
+#include <asm/bootinfo.h>
+#include <asm/addrspace.h>
+
+#include "common.h"
+
+static inline int is_valid_ram_addr(void *addr)
+{
+ if (((u32) addr > KSEG0) &&
+ ((u32) addr < (KSEG0 + ATH79_MEM_SIZE_MAX)))
+ return 1;
+
+ if (((u32) addr > KSEG1) &&
+ ((u32) addr < (KSEG1 + ATH79_MEM_SIZE_MAX)))
+ return 1;
+
+ return 0;
+}
+
+static __init void ath79_prom_init_cmdline(int argc, char **argv)
+{
+ int i;
+
+ if (!is_valid_ram_addr(argv))
+ return;
+
+ for (i = 0; i < argc; i++)
+ if (is_valid_ram_addr(argv[i])) {
+ strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
+ strlcat(arcs_cmdline, argv[i], sizeof(arcs_cmdline));
+ }
+}
+
+void __init prom_init(void)
+{
+ ath79_prom_init_cmdline(fw_arg0, (char **)fw_arg1);
+}
+
+void __init prom_free_prom_memory(void)
+{
+ /* We do not have to prom memory to free */
+}