exec: Expose 'target_page.h' API to user emulation

User-only objects might benefit from the "exec/target_page.h"
API, which allows to build some objects once for all targets.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20231211212003.21686-3-philmd@linaro.org>

meson.build

@@ -3523,7 +3523,7 @@ if get_option('b_lto')
   pagevary = declare_dependency(link_with: pagevary)
 endif
 common_ss.add(pagevary)
-specific_ss.add(files('page-vary-target.c'))
+specific_ss.add(files('page-target.c', 'page-vary-target.c'))
 
 subdir('backends')
 subdir('disas')

page-target.c

@@ -0,0 +1,44 @@
+/*
+ * QEMU page values getters (target independent)
+ *
+ *  Copyright (c) 2003 Fabrice Bellard
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "exec/target_page.h"
+#include "exec/cpu-defs.h"
+#include "cpu.h"
+#include "exec/cpu-all.h"
+
+size_t qemu_target_page_size(void)
+{
+    return TARGET_PAGE_SIZE;
+}
+
+int qemu_target_page_mask(void)
+{
+    return TARGET_PAGE_MASK;
+}
+
+int qemu_target_page_bits(void)
+{
+    return TARGET_PAGE_BITS;
+}
+
+int qemu_target_page_bits_min(void)
+{
+    return TARGET_PAGE_BITS_MIN;
+}
+
+/* Convert target pages to MiB (2**20). */
+size_t qemu_target_pages_to_MiB(size_t pages)
+{
+    int page_bits = TARGET_PAGE_BITS;
+
+    /* So far, the largest (non-huge) page size is 64k, i.e. 16 bits. */
+    g_assert(page_bits < 20);
+
+    return pages >> (20 - page_bits);
+}

system/physmem.c

@@ -3540,36 +3540,6 @@ int cpu_memory_rw_debug(CPUState *cpu, vaddr addr,
     return 0;
 }
 
-/*
- * Allows code that needs to deal with migration bitmaps etc to still be built
- * target independent.
- */
-size_t qemu_target_page_size(void)
-{
-    return TARGET_PAGE_SIZE;
-}
-
-int qemu_target_page_bits(void)
-{
-    return TARGET_PAGE_BITS;
-}
-
-int qemu_target_page_bits_min(void)
-{
-    return TARGET_PAGE_BITS_MIN;
-}
-
-/* Convert target pages to MiB (2**20). */
-size_t qemu_target_pages_to_MiB(size_t pages)
-{
-    int page_bits = TARGET_PAGE_BITS;
-
-    /* So far, the largest (non-huge) page size is 64k, i.e. 16 bits. */
-    g_assert(page_bits < 20);
-
-    return pages >> (20 - page_bits);
-}
-
 bool cpu_physical_memory_is_io(hwaddr phys_addr)
 {
     MemoryRegion*mr;

target/meson.build

@@ -18,5 +18,3 @@ subdir('sh4')
 subdir('sparc')
 subdir('tricore')
 subdir('xtensa')
-
-specific_ss.add(files('target-common.c'))

target/target-common.c

@@ -1,10 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-#include "qemu/osdep.h"
-
-#include "cpu.h"
-#include "exec/target_page.h"
-
-int qemu_target_page_mask(void)
-{
-    return TARGET_PAGE_MASK;
-}