commit 75c578dcaae48f239fc87b545022efa8fa13f455
author Avi Kivity <avi@redhat.com> Mon Jan 02 15:40:52 2012 +0200
committer Avi Kivity <avi@redhat.com> Wed Jan 04 13:34:50 2012 +0200
tree e3a7182da298ce03bb894fa166c236fb6689a5d4
parent b3b00c78d8247cdffc25839d4b8ff0310a889480

Drop IO_MEM_ROMD

Unlike ->readonly, ->readable is not inherited from aliase, so we can simply
query the memory region.

Signed-off-by: Avi Kivity <avi@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>

cpu-common.h

diff --git a/cpu-common.h b/cpu-common.h
index ffb0a44..0f3a682 100644
--- a/cpu-common.h
+++ b/cpu-common.h
@@ -114,9 +114,6 @@
 extern struct MemoryRegion io_mem_unassigned;
 extern struct MemoryRegion io_mem_notdirty;
 
-/* Acts like a ROM when read and like a device when written.  */
-#define IO_MEM_ROMD        (1)
-
 #endif
 
 #endif /* !CPU_COMMON_H */

exec.c

diff --git a/exec.c b/exec.c
index d5b82aa..8916825 100644
--- a/exec.c
+++ b/exec.c
@@ -2091,9 +2091,18 @@
     return pd == io_mem_ram.ram_addr || pd == io_mem_rom.ram_addr;
 }
 
+static bool is_romd(ram_addr_t pd)
+{
+    MemoryRegion *mr;
+
+    pd &= ~TARGET_PAGE_MASK;
+    mr = io_mem_region[pd >> IO_MEM_SHIFT];
+    return mr->rom_device && mr->readable;
+}
+
 static bool is_ram_rom_romd(ram_addr_t pd)
 {
-    return is_ram_rom(pd) || (pd & IO_MEM_ROMD);
+    return is_ram_rom(pd) || is_romd(pd);
 }
 
 /* Add a new TLB entry. At most one entry for a given virtual address
@@ -2179,8 +2188,7 @@
         te->addr_code = -1;
     }
     if (prot & PAGE_WRITE) {
-        if ((pd & ~TARGET_PAGE_MASK) == io_mem_rom.ram_addr ||
-            (pd & IO_MEM_ROMD)) {
+        if ((pd & ~TARGET_PAGE_MASK) == io_mem_rom.ram_addr || is_romd(pd)) {
             /* Write access calls the I/O callback.  */
             te->addr_write = address | TLB_MMIO;
         } else if ((pd & ~TARGET_PAGE_MASK) == io_mem_ram.ram_addr &&
@@ -2528,10 +2536,6 @@
         region_offset = 0;
     }
 
-    if (!readable) {
-        phys_offset &= ~TARGET_PAGE_MASK & ~IO_MEM_ROMD;
-    }
-
     if (readonly) {
         phys_offset |= io_mem_rom.ram_addr;
     }
@@ -4379,7 +4383,7 @@
     }
     pd = env1->tlb_table[mmu_idx][page_index].addr_code & ~TARGET_PAGE_MASK;
     if (pd != io_mem_ram.ram_addr && pd != io_mem_rom.ram_addr
-        && !(pd & IO_MEM_ROMD)) {
+        && !is_romd(pd)) {
 #if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_SPARC)
         cpu_unassigned_access(env1, addr, 0, 1, 0, 4);
 #else

memory.c

diff --git a/memory.c b/memory.c
index 24b6b6f..394cbab 100644
--- a/memory.c
+++ b/memory.c
@@ -838,7 +838,7 @@
 static void memory_region_destructor_rom_device(MemoryRegion *mr)
 {
     qemu_ram_free(mr->ram_addr & TARGET_PAGE_MASK);
-    cpu_unregister_io_memory(mr->ram_addr & ~(TARGET_PAGE_MASK | IO_MEM_ROMD));
+    cpu_unregister_io_memory(mr->ram_addr & ~TARGET_PAGE_MASK);
 }
 
 static bool memory_region_wrong_endianness(MemoryRegion *mr)
@@ -868,6 +868,7 @@
     mr->ram = false;
     mr->readable = true;
     mr->readonly = false;
+    mr->rom_device = false;
     mr->destructor = memory_region_destructor_none;
     mr->priority = 0;
     mr->may_overlap = false;
@@ -1039,10 +1040,10 @@
     mr->ops = ops;
     mr->opaque = opaque;
     mr->terminates = true;
+    mr->rom_device = true;
     mr->destructor = memory_region_destructor_rom_device;
     mr->ram_addr = qemu_ram_alloc(size, mr);
     mr->ram_addr |= cpu_register_io_memory(mr);
-    mr->ram_addr |= IO_MEM_ROMD;
 }
 
 void memory_region_destroy(MemoryRegion *mr)

memory.h

diff --git a/memory.h b/memory.h
index fbca6f1..70f57fb 100644
--- a/memory.h
+++ b/memory.h
@@ -125,6 +125,7 @@
     bool ram;
     bool readonly; /* For RAM regions */
     bool enabled;
+    bool rom_device;
     MemoryRegion *alias;
     target_phys_addr_t alias_offset;
     unsigned priority;