[PATCH v2 2/4] arm/setup: Move MMU specific extern declarations to mmu/setup.h

[Luca Fancellu <luca.fancellu@xxxxxxx>]

Move some extern declarations related to MMU structures and define
from asm/setup.h to asm/mmu/setup.h, in order to increase encapsulation
and allow the MPU part to build, since it has no clue about them.

Signed-off-by: Luca Fancellu <luca.fancellu@xxxxxxx>
---
Changes from v1:
 - Moved extern to mmu/setup.h instead of mmu/mm.h
 - moved also pte_of_xenaddr()
---
---
 xen/arch/arm/include/asm/mmu/setup.h | 31 ++++++++++++++++++++++++++++
 xen/arch/arm/include/asm/setup.h     | 20 ++++++------------
 2 files changed, 37 insertions(+), 14 deletions(-)
 create mode 100644 xen/arch/arm/include/asm/mmu/setup.h

diff --git a/xen/arch/arm/include/asm/mmu/setup.h 
b/xen/arch/arm/include/asm/mmu/setup.h
new file mode 100644
index 000000000000..3fe752b04c63
--- /dev/null
+++ b/xen/arch/arm/include/asm/mmu/setup.h
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef __ARM_MMU_SETUP_H__
+#define __ARM_MMU_SETUP_H__
+
+#include <asm/lpae.h>
+#include <asm/mmu/layout.h>
+
+extern lpae_t boot_pgtable[XEN_PT_LPAE_ENTRIES];
+
+#ifdef CONFIG_ARM_64
+extern lpae_t boot_first[XEN_PT_LPAE_ENTRIES];
+extern lpae_t boot_first_id[XEN_PT_LPAE_ENTRIES];
+#endif
+extern lpae_t boot_second[XEN_PT_LPAE_ENTRIES];
+extern lpae_t boot_second_id[XEN_PT_LPAE_ENTRIES];
+extern lpae_t boot_third[XEN_PT_LPAE_ENTRIES * XEN_NR_ENTRIES(2)];
+extern lpae_t boot_third_id[XEN_PT_LPAE_ENTRIES];
+
+/* Find where Xen will be residing at runtime and return a PT entry */
+lpae_t pte_of_xenaddr(vaddr_t va);
+
+#endif /* __ARM_MMU_SETUP_H__ */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
diff --git a/xen/arch/arm/include/asm/setup.h b/xen/arch/arm/include/asm/setup.h
index 64c227d171fc..a5a80d9b477f 100644
--- a/xen/arch/arm/include/asm/setup.h
+++ b/xen/arch/arm/include/asm/setup.h
@@ -6,6 +6,12 @@
 #include <xen/bootfdt.h>
 #include <xen/device_tree.h>
 
+#if defined(CONFIG_MMU)
+# include <asm/mmu/setup.h>
+#elif !defined(CONFIG_MPU)
+# error "Unknown memory management layout"
+#endif
+
 #define MAX_FDT_SIZE SZ_2M
 
 struct map_range_data
@@ -65,20 +71,6 @@ int map_irq_to_domain(struct domain *d, unsigned int irq,
 int map_range_to_domain(const struct dt_device_node *dev,
                         uint64_t addr, uint64_t len, void *data);
 
-extern lpae_t boot_pgtable[XEN_PT_LPAE_ENTRIES];
-
-#ifdef CONFIG_ARM_64
-extern lpae_t boot_first[XEN_PT_LPAE_ENTRIES];
-extern lpae_t boot_first_id[XEN_PT_LPAE_ENTRIES];
-#endif
-extern lpae_t boot_second[XEN_PT_LPAE_ENTRIES];
-extern lpae_t boot_second_id[XEN_PT_LPAE_ENTRIES];
-extern lpae_t boot_third[XEN_PT_LPAE_ENTRIES * XEN_NR_ENTRIES(2)];
-extern lpae_t boot_third_id[XEN_PT_LPAE_ENTRIES];
-
-/* Find where Xen will be residing at runtime and return a PT entry */
-lpae_t pte_of_xenaddr(vaddr_t va);
-
 extern const char __ro_after_init_start[], __ro_after_init_end[];
 
 struct init_info
-- 
2.34.1