[PATCH 7/7] pc-bios: s390x: Setup io and ext new psws only once

[Janosch Frank]

Absolutely no need to set them up every time before we enable our
interrupt masks.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
---
 pc-bios/s390-ccw/start.S | 30 +++++++++++++-----------------
 1 file changed, 13 insertions(+), 17 deletions(-)

diff --git a/pc-bios/s390-ccw/start.S b/pc-bios/s390-ccw/start.S
index 01c4c21b26..0059a15d21 100644
--- a/pc-bios/s390-ccw/start.S
+++ b/pc-bios/s390-ccw/start.S
@@ -34,6 +34,12 @@ loop:
 remainder:
        larl    %r2,memsetxc
        ex      %r3,0(%r2)
+        /* Store io new PSW */
+        larl   %r1,io_new_psw
+        mvc    0x1f0(16),0(%r1)
+       /* Store ext new PSW */
+        larl   %r1,external_new_psw
+        mvc    0x1b0(16),0(%r1)
 done:
        j      main             /* And call C */
 
@@ -64,11 +70,6 @@ consume_sclp_int:
         stctg   %c0,%c0,0(%r15)
         oi      6(%r15),0x2
         lctlg   %c0,%c0,0(%r15)
-        /* prepare external call handler */
-        larl %r1, external_new_code
-        stg %r1, 0x1b8
-        larl %r1, external_new_mask
-        mvc 0x1b0(8),0(%r1)
         /* load enabled wait PSW */
         larl %r1, enabled_wait_psw
         lpswe 0(%r1)
@@ -81,14 +82,9 @@ consume_sclp_int:
         .globl consume_io_int
 consume_io_int:
         /* enable I/O interrupts in cr6 */
-        stctg %c6,%c6,0(%r15)
-        oi    4(%r15), 0xff
-        lctlg %c6,%c6,0(%r15)
-        /* prepare i/o call handler */
-        larl  %r1, io_new_code
-        stg   %r1, 0x1f8
-        larl  %r1, io_new_mask
-        mvc   0x1f0(8),0(%r1)
+        stctg  %c6, %c6, 0(%r15)
+        oi     4(%r15), 0xff
+        lctlg  %c6, %c6, 0(%r15)
         /* load enabled wait PSW */
         larl  %r1, enabled_wait_psw
         lpswe 0(%r1)
@@ -112,7 +108,7 @@ disabled_wait_psw:
         .quad   PSW_MASK_DWAIT, 0x0000000000000000
 enabled_wait_psw:
         .quad   PSW_MASK_EWAIT, 0x0000000000000000
-external_new_mask:
-        .quad   PSW_MASK_64
-io_new_mask:
-        .quad   PSW_MASK_64
+external_new_psw:
+        .quad   PSW_MASK_64, external_new_code
+io_new_psw:
+        .quad   PSW_MASK_64, io_new_code
-- 
2.25.1