Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / arm / boot / compressed / head-shmobile.S

diff --git a/kernel/arch/arm/boot/compressed/head-shmobile.S b/kernel/arch/arm/boot/compressed/head-shmobile.S
new file mode 100644 (file)
index 0000000..22a7525
--- /dev/null
+++ b/kernel/arch/arm/boot/compressed/head-shmobile.S
@@ -0,0 +1,71 @@
+/*
+ * The head-file for SH-Mobile ARM platforms
+ *
+ * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ * Simon Horman <horms@verge.net.au>
+ *
+ * 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; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifdef CONFIG_ZBOOT_ROM
+
+       .section        ".start", "ax"
+
+       /* load board-specific initialization code */
+#include <mach/zboot.h>
+
+       adr     r0, dtb_info
+       ldmia   r0, {r1, r3, r4, r5, r7}
+
+       sub     r0, r0, r1              @ calculate the delta offset
+       add     r5, r5, r0              @ _edata
+
+       ldr     lr, [r5, #0]            @ check if valid DTB is present
+       cmp     lr, r3
+       bne     0f
+
+       add     r9, r7, #31             @ rounded up to a multiple
+       bic     r9, r9, #31             @ ... of 32 bytes
+
+       add     r6, r9, r5              @ copy from _edata
+       add     r9, r9, r4              @ to MEMORY_START
+
+1:     ldmdb   r6!, {r0 - r3, r10 - r12, lr}
+       cmp     r6, r5
+       stmdb   r9!, {r0 - r3, r10 - r12, lr}
+       bhi     1b
+
+       /* Success: Zero board ID, pointer to start of memory for atag/dtb */
+       mov     r7, #0
+       mov     r8, r4
+       b       2f
+
+       .align  2
+dtb_info:
+       .word   dtb_info
+#ifndef __ARMEB__
+       .word   0xedfe0dd0              @ sig is 0xd00dfeed big endian
+#else
+       .word   0xd00dfeed
+#endif
+       .word   MEMORY_START
+       .word   _edata
+       .word   0x4000                  @ maximum DTB size
+0:
+       /* Failure: Zero board ID, NULL atag/dtb */
+       mov     r7, #0
+       mov     r8, #0                  @ pass null pointer as atag
+2 :
+
+#endif /* CONFIG_ZBOOT_ROM */