On S/390, absolute addresses are physical ones.

Since mmu_real2abs() is defined in mmu_helper.c, move
its prototype declaration below the 'mmu_helper.c' comment.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 target/s390x/s390x-internal.h | 5 +++--
 target/s390x/mmu_helper.c     | 4 ++--
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/target/s390x/s390x-internal.h b/target/s390x/s390x-internal.h
index a4b54dc441c..dfc95702c51 100644
--- a/target/s390x/s390x-internal.h
+++ b/target/s390x/s390x-internal.h
@@ -10,6 +10,7 @@
 #ifndef S390X_INTERNAL_H
 #define S390X_INTERNAL_H
 
+#include "exec/hwaddr.h"
 #include "cpu.h"
 #include "fpu/softfloat.h"
 
@@ -367,13 +368,13 @@ void ioinst_handle_sal(S390CPU *cpu, uint64_t reg1, uintptr_t ra);
 
 
 /* mem_helper.c */
-target_ulong mmu_real2abs(CPUS390XState *env, target_ulong raddr);
 void probe_write_access(CPUS390XState *env, uint64_t addr, uint64_t len,
                         uintptr_t ra);
 
 
 /* mmu_helper.c */
-bool mmu_absolute_addr_valid(target_ulong addr, bool is_write);
+hwaddr mmu_real2abs(CPUS390XState *env, hwaddr raddr);
+bool mmu_absolute_addr_valid(hwaddr addr, bool is_write);
 /* Special access mode only valid for mmu_translate() */
 #define MMU_S390_LRA        -1
 int mmu_translate(CPUS390XState *env, target_ulong vaddr, int rw, uint64_t asc,
diff --git a/target/s390x/mmu_helper.c b/target/s390x/mmu_helper.c
index ccb53e99ebd..b73d902b05a 100644
--- a/target/s390x/mmu_helper.c
+++ b/target/s390x/mmu_helper.c
@@ -86,7 +86,7 @@ static bool lowprot_enabled(const CPUS390XState *env, uint64_t asc)
  * Translate real address to absolute (= physical)
  * address by taking care of the prefix mapping.
  */
-target_ulong mmu_real2abs(CPUS390XState *env, target_ulong raddr)
+hwaddr mmu_real2abs(CPUS390XState *env, hwaddr raddr)
 {
     if (raddr < 0x2000) {
         return raddr + env->psa;    /* Map the lowcore. */
@@ -96,7 +96,7 @@ target_ulong mmu_real2abs(CPUS390XState *env, target_ulong raddr)
     return raddr;
 }
 
-bool mmu_absolute_addr_valid(target_ulong addr, bool is_write)
+bool mmu_absolute_addr_valid(hwaddr addr, bool is_write)
 {
     return address_space_access_valid(&address_space_memory,
                                       addr & TARGET_PAGE_MASK,
-- 
2.52.0