[ARM] 4423/1: add ATAGS support
Examines the ATAGS pointer (r2) at boot, and interprets
a nonzero value as a reference to an ATAGS structure. A
suitable ATAGS structure replaces the kernel's command line.
Signed-off-by: Bill Gatliff <bgat@billgatliff.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 650eac1..5be2e98 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -63,6 +63,8 @@
unsigned int __machine_arch_type;
EXPORT_SYMBOL(__machine_arch_type);
+unsigned int __atags_pointer __initdata;
+
unsigned int system_rev;
EXPORT_SYMBOL(system_rev);
@@ -780,7 +782,9 @@
if (mdesc->soft_reboot)
reboot_setup("s");
- if (mdesc->boot_params)
+ if (__atags_pointer)
+ tags = phys_to_virt(__atags_pointer);
+ else if (mdesc->boot_params)
tags = phys_to_virt(mdesc->boot_params);
/*