summaryrefslogtreecommitdiff
path: root/arch/s390/kernel/relocate_kernel.S
diff options
context:
space:
mode:
authorHeiko Carstens <heiko.carstens@de.ibm.com>2015-02-13 13:04:39 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2015-03-25 11:49:34 +0100
commit4bfc86ce9436ea8064cad90fd891625bd814be1d (patch)
tree1236109ded892f3305bef2d38bfa524bbb170c9e /arch/s390/kernel/relocate_kernel.S
parent5a79859ae0f35d25c67a03e82bf0c80592f16a39 (diff)
downloadlwn-4bfc86ce9436ea8064cad90fd891625bd814be1d.tar.gz
lwn-4bfc86ce9436ea8064cad90fd891625bd814be1d.zip
s390: remove "64" suffix from a couple of files
Rename a couple of files to get rid of the "64" suffix. "git blame" will still work. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/relocate_kernel.S')
-rw-r--r--arch/s390/kernel/relocate_kernel.S121
1 files changed, 121 insertions, 0 deletions
diff --git a/arch/s390/kernel/relocate_kernel.S b/arch/s390/kernel/relocate_kernel.S
new file mode 100644
index 000000000000..cfac28330b03
--- /dev/null
+++ b/arch/s390/kernel/relocate_kernel.S
@@ -0,0 +1,121 @@
+/*
+ * Copyright IBM Corp. 2005
+ *
+ * Author(s): Rolf Adelsberger,
+ * Heiko Carstens <heiko.carstens@de.ibm.com>
+ *
+ */
+
+#include <linux/linkage.h>
+#include <asm/sigp.h>
+
+/*
+ * moves the new kernel to its destination...
+ * %r2 = pointer to first kimage_entry_t
+ * %r3 = start address - where to jump to after the job is done...
+ *
+ * %r5 will be used as temp. storage
+ * %r6 holds the destination address
+ * %r7 = PAGE_SIZE
+ * %r8 holds the source address
+ * %r9 = PAGE_SIZE
+ *
+ * 0xf000 is a page_mask
+ */
+
+ .text
+ENTRY(relocate_kernel)
+ basr %r13,0 # base address
+ .base:
+ stnsm sys_msk-.base(%r13),0xfb # disable DAT
+ stctg %c0,%c15,ctlregs-.base(%r13)
+ stmg %r0,%r15,gprregs-.base(%r13)
+ lghi %r0,3
+ sllg %r0,%r0,31
+ stg %r0,0x1d0(%r0)
+ la %r0,.back_pgm-.base(%r13)
+ stg %r0,0x1d8(%r0)
+ la %r1,load_psw-.base(%r13)
+ mvc 0(8,%r0),0(%r1)
+ la %r0,.back-.base(%r13)
+ st %r0,4(%r0)
+ oi 4(%r0),0x80
+ lghi %r0,0
+ diag %r0,%r0,0x308
+ .back:
+ lhi %r1,1 # mode 1 = esame
+ sigp %r1,%r0,SIGP_SET_ARCHITECTURE # switch to esame mode
+ sam64 # switch to 64 bit addressing mode
+ basr %r13,0
+ .back_base:
+ oi have_diag308-.back_base(%r13),0x01
+ lctlg %c0,%c15,ctlregs-.back_base(%r13)
+ lmg %r0,%r15,gprregs-.back_base(%r13)
+ j .top
+ .back_pgm:
+ lmg %r0,%r15,gprregs-.base(%r13)
+ .top:
+ lghi %r7,4096 # load PAGE_SIZE in r7
+ lghi %r9,4096 # load PAGE_SIZE in r9
+ lg %r5,0(%r2) # read another word for indirection page
+ aghi %r2,8 # increment pointer
+ tml %r5,0x1 # is it a destination page?
+ je .indir_check # NO, goto "indir_check"
+ lgr %r6,%r5 # r6 = r5
+ nill %r6,0xf000 # mask it out and...
+ j .top # ...next iteration
+ .indir_check:
+ tml %r5,0x2 # is it a indirection page?
+ je .done_test # NO, goto "done_test"
+ nill %r5,0xf000 # YES, mask out,
+ lgr %r2,%r5 # move it into the right register,
+ j .top # and read next...
+ .done_test:
+ tml %r5,0x4 # is it the done indicator?
+ je .source_test # NO! Well, then it should be the source indicator...
+ j .done # ok, lets finish it here...
+ .source_test:
+ tml %r5,0x8 # it should be a source indicator...
+ je .top # NO, ignore it...
+ lgr %r8,%r5 # r8 = r5
+ nill %r8,0xf000 # masking
+ 0: mvcle %r6,%r8,0x0 # copy PAGE_SIZE bytes from r8 to r6 - pad with 0
+ jo 0b
+ j .top
+ .done:
+ sgr %r0,%r0 # clear register r0
+ la %r4,load_psw-.base(%r13) # load psw-address into the register
+ o %r3,4(%r4) # or load address into psw
+ st %r3,4(%r4)
+ mvc 0(8,%r0),0(%r4) # copy psw to absolute address 0
+ tm have_diag308-.base(%r13),0x01
+ jno .no_diag308
+ diag %r0,%r0,0x308
+ .no_diag308:
+ sam31 # 31 bit mode
+ sr %r1,%r1 # erase register r1
+ sr %r2,%r2 # erase register r2
+ sigp %r1,%r2,SIGP_SET_ARCHITECTURE # set cpuid to zero
+ lpsw 0 # hopefully start new kernel...
+
+ .align 8
+ load_psw:
+ .long 0x00080000,0x80000000
+ sys_msk:
+ .quad 0
+ ctlregs:
+ .rept 16
+ .quad 0
+ .endr
+ gprregs:
+ .rept 16
+ .quad 0
+ .endr
+ have_diag308:
+ .byte 0
+ .align 8
+ relocate_kernel_end:
+ .align 8
+ .globl relocate_kernel_len
+ relocate_kernel_len:
+ .quad relocate_kernel_end - relocate_kernel