diff mbox series

[v5,07/12] pc-bios: s390x: Use PSW masks where possible and introduce PSW_MASK_SHORT_ADDR

Message ID 20200624075226.92728-8-frankja@linux.ibm.com (mailing list archive)
State New, archived
Headers show
Series pc-bios: s390x: Cleanup part 1 | expand

Commit Message

Janosch Frank June 24, 2020, 7:52 a.m. UTC 
Let's move some of the PSW mask defines into s390-arch.h and use them
in jump2ipl.c. Also let's introduce a new constant for the address
mask of 8 byte (short) PSWs.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
---
 pc-bios/s390-ccw/jump2ipl.c  | 10 ++++------
 pc-bios/s390-ccw/s390-arch.h |  2 ++
 2 files changed, 6 insertions(+), 6 deletions(-)

Comments

Thomas Huth June 25, 2020, 11:39 a.m. UTC | #1 
On 24/06/2020 09.52, Janosch Frank wrote:
> Let's move some of the PSW mask defines into s390-arch.h and use them
> in jump2ipl.c. Also let's introduce a new constant for the address
> mask of 8 byte (short) PSWs.
> 
> Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
> Reviewed-by: David Hildenbrand <david@redhat.com>
> ---
>   pc-bios/s390-ccw/jump2ipl.c  | 10 ++++------
>   pc-bios/s390-ccw/s390-arch.h |  2 ++
>   2 files changed, 6 insertions(+), 6 deletions(-)

Reviewed-by: Thomas Huth <thuth@redhat.com>
diff mbox series

Patch

diff --git a/pc-bios/s390-ccw/jump2ipl.c b/pc-bios/s390-ccw/jump2ipl.c
index 4eba2510b0..767012bf0c 100644
--- a/pc-bios/s390-ccw/jump2ipl.c
+++ b/pc-bios/s390-ccw/jump2ipl.c
@@ -8,12 +8,10 @@ 
 
 #include "libc.h"
 #include "s390-ccw.h"
+#include "s390-arch.h"
 
 #define KERN_IMAGE_START 0x010000UL
-#define PSW_MASK_64 0x0000000100000000ULL
-#define PSW_MASK_32 0x0000000080000000ULL
-#define PSW_MASK_SHORTPSW 0x0008000000000000ULL
-#define RESET_PSW_MASK (PSW_MASK_SHORTPSW | PSW_MASK_32 | PSW_MASK_64)
+#define RESET_PSW_MASK (PSW_MASK_SHORTPSW | PSW_MASK_64)
 
 typedef struct ResetInfo {
     uint64_t ipl_psw;
@@ -54,7 +52,7 @@  void jump_to_IPL_code(uint64_t address)
 
     current->ipl_psw = (uint64_t) &jump_to_IPL_2;
     current->ipl_psw |= RESET_PSW_MASK;
-    current->ipl_continue = address & 0x7fffffff;
+    current->ipl_continue = address & PSW_MASK_SHORT_ADDR;
 
     debug_print_int("set IPL addr to", current->ipl_continue);
 
@@ -86,7 +84,7 @@  void jump_to_low_kernel(void)
 
     /* Trying to get PSW at zero address */
     if (*((uint64_t *)0) & RESET_PSW_MASK) {
-        jump_to_IPL_code((*((uint64_t *)0)) & 0x7fffffff);
+        jump_to_IPL_code((*((uint64_t *)0)) & PSW_MASK_SHORT_ADDR);
     }
 
     /* No other option left, so use the Linux kernel start address */
diff --git a/pc-bios/s390-ccw/s390-arch.h b/pc-bios/s390-ccw/s390-arch.h
index 73852029d4..6da44d4436 100644
--- a/pc-bios/s390-ccw/s390-arch.h
+++ b/pc-bios/s390-ccw/s390-arch.h
@@ -26,9 +26,11 @@  _Static_assert(sizeof(struct PSWLegacy) == 8, "PSWLegacy size incorrect");
 
 /* s390 psw bit masks */
 #define PSW_MASK_IOINT      0x0200000000000000ULL
+#define PSW_MASK_SHORTPSW   0x0008000000000000ULL
 #define PSW_MASK_WAIT       0x0002000000000000ULL
 #define PSW_MASK_EAMODE     0x0000000100000000ULL
 #define PSW_MASK_BAMODE     0x0000000080000000ULL
+#define PSW_MASK_SHORT_ADDR 0x000000007fffffffULL
 #define PSW_MASK_64         (PSW_MASK_EAMODE | PSW_MASK_BAMODE)
 
 /* Low core mapping */