Major cleanup :

[openwrt.git] / target / linux / brcm63xx-2.6 / files / arch / mips / bcm963xx / info.c

diff --git a/target/linux/brcm63xx-2.6/files/arch/mips/bcm963xx/info.c b/target/linux/brcm63xx-2.6/files/arch/mips/bcm963xx/info.c
new file mode 100644 (file)
index 0000000..d492aa3
--- /dev/null
+++ b/target/linux/brcm63xx-2.6/files/arch/mips/bcm963xx/info.c
@@ -0,0 +1,86 @@
+/*
+ * $Id$
+ *
+ * Copyright (C) 2007 OpenWrt.org
+ * Copyright (C) 2007 Gabor Juhos <juhosg@freemail.hu>
+ * Copyright (C) 2007 Florian Fainelli <florian@openwrt.org>
+ *
+ * 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.
+ */
+
+#include <linux/types.h>
+#include <linux/autoconf.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+
+#include <asm/bootinfo.h>
+#include <asm/addrspace.h>
+#include <asm/string.h>
+#include <asm/mach-bcm963xx/bootloaders.h>
+
+static char *boot_loader_names[BOOT_LOADER_LAST+1] = {
+        [BOOT_LOADER_UNKNOWN]   = "Unknown",
+        [BOOT_LOADER_CFE]       = "CFE",
+        [BOOT_LOADER_REDBOOT]  = "RedBoot"
+};
+
+/* boot loaders specific definitions */
+#define CFE_EPTSEAL    0x43464531 /* CFE1 is the magic number to recognize CFE from other bootloaders */
+
+int boot_loader_type;
+/*
+ * Boot loader detection routines
+ */
+static int __init detect_cfe(void)
+{
+       /*
+        * This method only works, when we are booted directly from the CFE.
+        */
+       uint32_t cfe_handle = (uint32_t) fw_arg0;
+       uint32_t cfe_a1_val = (uint32_t) fw_arg1;
+       uint32_t cfe_entry = (uint32_t) fw_arg2;
+       uint32_t cfe_seal = (uint32_t) fw_arg3;
+
+       /* Check for CFE by finding the CFE magic number */
+       if (cfe_seal != CFE_EPTSEAL)
+               /* We are not booted from CFE */
+               return 0;
+
+       /* cfe_a1_val must be 0, because only one CPU present in the ADM5120 SoC */
+       if (cfe_a1_val != 0)
+               return 0;
+
+       /* The cfe_handle, and the cfe_entry must be kernel mode addresses */
+       if ((cfe_handle < KSEG0) || (cfe_entry < KSEG0))
+               return 0;
+
+       return 1;
+}
+
+static int __init detect_redboot(void)
+{
+       /* On Inventel Livebox, the boot loader is passed as a command line argument, check for it */
+       if (!strncmp(arcs_cmdline, "boot_loader=RedBoot", 19))
+               return 1;
+       return 0;
+}
+
+void __init detect_bootloader(void)
+{
+       if (detect_cfe()) {
+               boot_loader_type = BOOT_LOADER_CFE;
+               printk("Boot loader is : %s\n", boot_loader_names[boot_loader_type]);
+       }
+
+       if (detect_redboot()) {
+               boot_loader_type = BOOT_LOADER_REDBOOT;
+       }
+       else
+               boot_loader_type = BOOT_LOADER_UNKNOWN;
+}
+
+EXPORT_SYMBOL(boot_loader_type);