sh: simplify kexec vbr code

Setup the vbr register in machine_kexec(). This
instead of passing values to the assembly snippet.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

2 files changed, 8 insertions, 13 deletions

diff --git a/arch/sh/kernel/machine_kexec.c b/arch/sh/kernel/machine_kexec.c
index 94df56b0d1f6..d3318f99256b 100644
--- a/arch/sh/kernel/machine_kexec.c
+++ b/arch/sh/kernel/machine_kexec.c
@@ -23,8 +23,7 @@
 typedef NORET_TYPE void (*relocate_new_kernel_t)(
                                 unsigned long indirection_page,
                                 unsigned long reboot_code_buffer,
-                                unsigned long start_address,
-                                unsigned long vbr_reg) ATTRIB_NORET;
+                                unsigned long start_address) ATTRIB_NORET;
 
 extern const unsigned char relocate_new_kernel[];
 extern const unsigned int relocate_new_kernel_size;
@@ -76,14 +75,8 @@ void machine_kexec(struct kimage *image)
 
         unsigned long page_list;
         unsigned long reboot_code_buffer;
-        unsigned long vbr_reg;
         relocate_new_kernel_t rnk;
 
-#if defined(CONFIG_SH_STANDARD_BIOS)
-        vbr_reg = ((unsigned long )gdb_vbr_vector) - 0x100;
-#else
-        vbr_reg = 0x80000000;  // dummy
-#endif
         /* Interrupts aren't acceptable while we reboot */
         local_irq_disable();
 
@@ -100,9 +93,15 @@ void machine_kexec(struct kimage *image)
         kexec_info(image);
         flush_cache_all();
 
+        set_bl_bit();
+#if defined(CONFIG_SH_STANDARD_BIOS)
+        asm volatile("ldc %0, vbr" :
+                     : "r" (((unsigned long) gdb_vbr_vector) - 0x100)
+                     : "memory");
+#endif
         /* now call it */
         rnk = (relocate_new_kernel_t) reboot_code_buffer;
-        (*rnk)(page_list, reboot_code_buffer, P2SEGADDR(image->start), vbr_reg);
+        (*rnk)(page_list, reboot_code_buffer, P2SEGADDR(image->start));
 }
 
 void arch_crash_save_vmcoreinfo(void)
diff --git a/arch/sh/kernel/relocate_kernel.S b/arch/sh/kernel/relocate_kernel.S
index c66cb3209db5..8b50b2c873a4 100644
--- a/arch/sh/kernel/relocate_kernel.S
+++ b/arch/sh/kernel/relocate_kernel.S
@@ -16,7 +16,6 @@ relocate_new_kernel:
         /* r4 = indirection_page   */
         /* r5 = reboot_code_buffer */
         /* r6 = start_address      */
-        /* r7 = vbr_reg            */
 
         mov.l   10f,r8    /* PAGE_SIZE */
         mov.l   11f,r9    /* P2SEG */
@@ -80,9 +79,6 @@ relocate_new_kernel:
         bra     0b
         nop
 6:
-#ifdef CONFIG_SH_STANDARD_BIOS
-        ldc   r7, vbr
-#endif
         jmp @r6
         nop