diff options
Diffstat (limited to 'target-s390x')
| -rw-r--r-- | target-s390x/cpu.h | 4 | ||||
| -rw-r--r-- | target-s390x/helper.c | 25 |
2 files changed, 29 insertions, 0 deletions
diff --git a/target-s390x/cpu.h b/target-s390x/cpu.h index 1f2d94218a..7951aabefc 100644 --- a/target-s390x/cpu.h +++ b/target-s390x/cpu.h @@ -302,6 +302,10 @@ int cpu_s390x_handle_mmu_fault (CPUS390XState *env, target_ulong address, int rw #ifndef CONFIG_USER_ONLY +void *s390_cpu_physical_memory_map(CPUS390XState *env, hwaddr addr, hwaddr *len, + int is_write); +void s390_cpu_physical_memory_unmap(CPUS390XState *env, void *addr, hwaddr len, + int is_write); void s390x_tod_timer(void *opaque); void s390x_cpu_timer(void *opaque); diff --git a/target-s390x/helper.c b/target-s390x/helper.c index 023c074150..3109c77d98 100644 --- a/target-s390x/helper.c +++ b/target-s390x/helper.c @@ -490,6 +490,31 @@ static void cpu_unmap_lowcore(LowCore *lowcore) cpu_physical_memory_unmap(lowcore, sizeof(LowCore), 1, sizeof(LowCore)); } +void *s390_cpu_physical_memory_map(CPUS390XState *env, hwaddr addr, hwaddr *len, + int is_write) +{ + hwaddr start = addr; + + /* Mind the prefix area. */ + if (addr < 8192) { + /* Map the lowcore. */ + start += env->psa; + *len = MIN(*len, 8192 - addr); + } else if ((addr >= env->psa) && (addr < env->psa + 8192)) { + /* Map the 0 page. */ + start -= env->psa; + *len = MIN(*len, 8192 - start); + } + + return cpu_physical_memory_map(start, len, is_write); +} + +void s390_cpu_physical_memory_unmap(CPUS390XState *env, void *addr, hwaddr len, + int is_write) +{ + cpu_physical_memory_unmap(addr, len, is_write, len); +} + static void do_svc_interrupt(CPUS390XState *env) { uint64_t mask, addr; |