sh: rework kexec segment code
Rework the kexec code to avoid using P2SEG. Instead
we walk the page list in machine_kexec() and convert
the addresses from physical to virtual using C.
Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/kernel/machine_kexec.c b/arch/sh/kernel/machine_kexec.c
index d3318f9..25b4748 100644
--- a/arch/sh/kernel/machine_kexec.c
+++ b/arch/sh/kernel/machine_kexec.c
@@ -76,6 +76,21 @@
unsigned long page_list;
unsigned long reboot_code_buffer;
relocate_new_kernel_t rnk;
+ unsigned long entry;
+ unsigned long *ptr;
+
+ /*
+ * Nicked from the mips version of machine_kexec():
+ * The generic kexec code builds a page list with physical
+ * addresses. Use phys_to_virt() to convert them to virtual.
+ */
+ for (ptr = &image->head; (entry = *ptr) && !(entry & IND_DONE);
+ ptr = (entry & IND_INDIRECTION) ?
+ phys_to_virt(entry & PAGE_MASK) : ptr + 1) {
+ if (*ptr & IND_SOURCE || *ptr & IND_INDIRECTION ||
+ *ptr & IND_DESTINATION)
+ *ptr = (unsigned long) phys_to_virt(*ptr);
+ }
/* Interrupts aren't acceptable while we reboot */
local_irq_disable();
@@ -101,7 +116,7 @@
#endif
/* now call it */
rnk = (relocate_new_kernel_t) reboot_code_buffer;
- (*rnk)(page_list, reboot_code_buffer, P2SEGADDR(image->start));
+ (*rnk)(page_list, reboot_code_buffer, 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 8b50b2c..2a6630b 100644
--- a/arch/sh/kernel/relocate_kernel.S
+++ b/arch/sh/kernel/relocate_kernel.S
@@ -18,7 +18,6 @@
/* r6 = start_address */
mov.l 10f,r8 /* PAGE_SIZE */
- mov.l 11f,r9 /* P2SEG */
/* stack setting */
add r8,r5
@@ -29,9 +28,8 @@
0:
mov.l @r4+,r0 /* cmd = *ind++ */
-1: /* addr = (cmd | P2SEG) & 0xfffffff0 */
+1: /* addr = cmd & 0xfffffff0 */
mov r0,r2
- or r9,r2
mov #-16,r1
and r1,r2
@@ -85,8 +83,6 @@
.align 2
10:
.long PAGE_SIZE
-11:
- .long P2SEG
relocate_new_kernel_end: