system/boot: More cleanup and shuffling

* arm efi additions
* cleanup some cpu headers which were oddly
  split between efi and bios_ia32
* Move calculate_cpu_conversion_factor over to
  arch_timer since it is timerish, and x86 only
* Drop some duplicated code from efi start. Move
  hpet init code into efi timer/hpet code

Change-Id: Ia4264a5690ba8c09417b06788febc4f572f111ce
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2259
Reviewed-by: Alex von Gluck IV <[email protected]>
Reviewed-by: Adrien Destugues <[email protected]>

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

@@ -8,6 +8,8 @@
 #include <arch/cpu.h>
 
 // memory layout
+#define KERNEL_LOAD_BASE	0x80000000
+
 #define KERNEL_BASE	0x80000000
 #define KERNEL_SIZE	0x80000000
 #define KERNEL_TOP	(KERNEL_BASE + (KERNEL_SIZE - 1))

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

@@ -9,6 +9,12 @@
 #	error This file is included from <boot/kernel_args.h> only
 #endif
 
+
+#include <util/FixedWidthPointer.h>
+
+
+#define _PACKED __attribute__((packed))
+
 // kernel args
 typedef struct {
 	int		cpu_type; 
@@ -18,9 +24,12 @@ typedef struct {
 	int		machine;  // platform specific machine type
 
 	// architecture specific
-        uint32  	phys_pgdir;
-        uint32  	vir_pgdir;
-	uint32		next_pagetable;
-} arch_kernel_args;
+	uint32	phys_pgdir;
+	uint32	vir_pgdir;
+	uint32	next_pagetable;
+
+	// needed for UEFI, otherwise kernel acpi support can't find ACPI root
+	FixedWidthPointer<void> acpi_root;
+} _PACKED arch_kernel_args;
 
 #endif	/* KERNEL_ARCH_ARM_KERNEL_ARGS_H */

headers/private/kernel/boot/arch/x86/arch_cpu.h

@@ -13,7 +13,6 @@
 extern "C" {
 #endif
 
-extern void cpu_init(void);
 
 void calculate_cpu_conversion_factor(uint8 channel);