tegra power: Add Warmboot boot arg to the kernel

The new NvBootArg_Warmboot argument allows the bootloader to pass
a memory region containing the warm bootloader to the kernel.

Change-Id: Ib8c2a45c64ae9e61240152e91c5cbcff421ada21

1 files changed, 13 insertions, 1 deletions

diff --git a/arch/arm/mach-tegra/include/nvbootargs.h b/arch/arm/mach-tegra/include/nvbootargs.h
index 7dc32a8a3204..908c26f0ea52 100644
--- a/arch/arm/mach-tegra/include/nvbootargs.h
+++ b/arch/arm/mach-tegra/include/nvbootargs.h
@@ -44,7 +44,7 @@
  * The maximum number of memory handles that may be preserved across the
  * bootloader-to-OS transition.  @see NvRmBootArg_PreservedMemHandle.
  */
-#define NV_BOOTARGS_MAX_PRESERVED_MEMHANDLES 2
+#define NV_BOOTARGS_MAX_PRESERVED_MEMHANDLES 3
 
 #if defined(__cplusplus)
 extern "C"
@@ -60,6 +60,7 @@ typedef enum
     NvBootArgKey_ChipShmoo,
     NvBootArgKey_ChipShmooPhys,
     NvBootArgKey_Carveout,
+    NvBootArgKey_WarmBoot,
     NvBootArgKey_PreservedMemHandle_0 = 0x10000,
     NvBootArgKey_PreservedMemHandle_Num = (NvBootArgKey_PreservedMemHandle_0 +
                                          NV_BOOTARGS_MAX_PRESERVED_MEMHANDLES),
@@ -87,6 +88,16 @@ typedef struct NvBootArgsCarveoutRec
 } NvBootArgsCarveout;
 
 /**
+ * Warmbootloader boot args. This structure only contains
+ * a mem handle key to preserve the warm bootloader
+ * across the bootloader->os transition
+ */
+typedef struct NvBootArgsWarmbootRec
+{
+    NvU32 MemHandleKey;
+} NvBootArgsWarmboot;
+
+/**
  * PreservedMemHandle boot args, indexed by PreservedMemHandle_0 + n.
  * All values n from 0 to the first value which does not return NvSuccess will
  * be quered at RM initialization in the OS environment.  If present, a new
@@ -212,6 +223,7 @@ typedef struct NvBootArgsRec
     NvBootArgsFramebuffer FramebufferArgs;
     NvBootArgsChipShmoo ChipShmooArgs;
     NvBootArgsChipShmooPhys ChipShmooPhysArgs;
+    NvBootArgsWarmboot WarmbootArgs;
     NvBootArgsPreservedMemHandle MemHandleArgs[NVBOOTARG_NUM_PRESERVED_HANDLES];
 } NvBootArgs;