From 716ca530e1c4515d8683c9d5be3d56b301758b66 Mon Sep 17 00:00:00 2001 From: James <> Date: Wed, 4 Nov 2015 11:49:21 +0000 Subject: trunk-47381 --- .../files-3.18/arch/mips/adm5120/prom/cfe.c | 69 ++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 target/linux/adm5120/files-3.18/arch/mips/adm5120/prom/cfe.c (limited to 'target/linux/adm5120/files-3.18/arch/mips/adm5120/prom/cfe.c') diff --git a/target/linux/adm5120/files-3.18/arch/mips/adm5120/prom/cfe.c b/target/linux/adm5120/files-3.18/arch/mips/adm5120/prom/cfe.c new file mode 100644 index 0000000..5a343cd --- /dev/null +++ b/target/linux/adm5120/files-3.18/arch/mips/adm5120/prom/cfe.c @@ -0,0 +1,69 @@ +/* + * Broadcom's CFE specific prom routines + * + * Copyright (C) 2007-2008 Gabor Juhos + * + * 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 +#include + +#include +#include + +#include +#include "prom_read.h" + +/* + * CFE based boards + */ +#define CFE_EPTSEAL 0x43464531 /* CFE1 is the magic number to recognize CFE +from other bootloaders */ + +static int cfe_found; + +static u32 cfe_handle; +static u32 cfe_entry; +static u32 cfe_seal; + +int __init cfe_present(void) +{ + /* + * This method only works, when we are booted directly from the CFE. + */ + u32 a1 = (u32) fw_arg1; + + if (cfe_found) + return 1; + + cfe_handle = (u32) fw_arg0; + cfe_entry = (u32) fw_arg2; + cfe_seal = (u32) fw_arg3; + + /* Check for CFE by finding the CFE magic number */ + if (cfe_seal != CFE_EPTSEAL) + return 0; + + /* cfe_a1_val must be 0, because only one CPU present in the ADM5120 */ + if (a1 != 0) + return 0; + + /* The cfe_handle, and the cfe_entry must be kernel mode addresses */ + if ((cfe_handle < KSEG0) || (cfe_entry < KSEG0)) + return 0; + + cfe_found = 1; + return 1; +} + +char *cfe_getenv(char *envname) +{ + if (cfe_found == 0) + return NULL; + + return NULL; +} -- cgit v1.2.3