kernel/arch/arm: introduce virtual_ranges_to_keep

Change-Id: I36b8b871a103f2be87c600fc0b0a12f7ceff0ae4
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4743
Tested-by: Commit checker robot <[email protected]>
Reviewed-by: Adrien Destugues <[email protected]>

headers/private/kernel/arch/arm/arch_kernel_args.h

@@ -16,6 +16,8 @@
 
 #define _PACKED __attribute__((packed))
 
+#define MAX_VIRTUAL_RANGES_TO_KEEP	32
+
 
 // kernel args
 typedef struct {
@@ -30,6 +32,10 @@ typedef struct {
 	uint32	vir_pgdir;
 	uint32	next_pagetable;
 
+	// The virtual ranges we want to keep in the kernel.
+	uint32		num_virtual_ranges_to_keep;
+	addr_range	virtual_ranges_to_keep[MAX_VIRTUAL_RANGES_TO_KEEP];
+
 	// needed for UEFI, otherwise kernel acpi support can't find ACPI root
 	FixedWidthPointer<void> acpi_root;
 	FixedWidthPointer<void> fdt;