diff options
Diffstat (limited to 'arch/arm/cpu/armv7/start.S')
| -rw-r--r-- | arch/arm/cpu/armv7/start.S | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S index 691e5d3..7eee54b 100644 --- a/arch/arm/cpu/armv7/start.S +++ b/arch/arm/cpu/armv7/start.S @@ -17,6 +17,7 @@ #include <config.h> #include <asm/system.h> #include <linux/linkage.h> +#include <asm/armv7.h> /************************************************************************* * @@ -30,11 +31,24 @@ .globl reset .globl save_boot_params_ret +#ifdef CONFIG_ARMV7_LPAE + .global switch_to_hypervisor_ret +#endif reset: /* Allow the board to save important registers */ b save_boot_params save_boot_params_ret: +#ifdef CONFIG_ARMV7_LPAE +/* + * check for Hypervisor support + */ + mrc p15, 0, r0, c0, c1, 1 @ read ID_PFR1 + and r0, r0, #CPUID_ARM_VIRT_MASK @ mask virtualization bits + cmp r0, #(1 << CPUID_ARM_VIRT_SHIFT) + beq switch_to_hypervisor +switch_to_hypervisor_ret: +#endif /* * disable interrupts (FIQ and IRQ), also set the cpu to SVC32 mode, * except if in HYP mode already @@ -103,6 +117,13 @@ ENTRY(save_boot_params) ENDPROC(save_boot_params) .weak save_boot_params +#ifdef CONFIG_ARMV7_LPAE +ENTRY(switch_to_hypervisor) + b switch_to_hypervisor_ret +ENDPROC(switch_to_hypervisor) + .weak switch_to_hypervisor +#endif + /************************************************************************* * * cpu_init_cp15 |