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 <kallisti5@unixzen.com>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

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);
 

src/system/boot/platform/bios_ia32/cpu.cpp

@@ -59,7 +59,7 @@ check_cpu_features()
 //	#pragma mark -
 
 
-extern "C" void
+void
 cpu_init()
 {
 	if (check_cpu_features() != B_OK)

src/system/boot/platform/bios_ia32/cpu.h

@@ -0,0 +1,12 @@
+/*
+ * Copyright 2019-2020, Haiku, Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _BIOS_IA32_CPU_H
+#define _BIOS_IA32_CPU_H
+
+
+void cpu_init(void);
+
+
+#endif /* _BIOS_IA32_CPU_H */

src/system/boot/platform/bios_ia32/start.cpp

@@ -19,6 +19,7 @@
 #include "apm.h"
 #include "bios.h"
 #include "console.h"
+#include "cpu.h"
 #include "debug.h"
 #include "hpet.h"
 #include "interrupts.h"

src/system/boot/platform/efi/arch/x86_64/arch_timer.cpp

@@ -19,6 +19,7 @@
 #include <safemode.h>
 #include <boot/stage2.h>
 #include <boot/menu.h>
+#include <boot/arch/x86/arch_cpu.h>
 #include <arch/x86/arch_acpi.h>
 #include <arch/x86/arch_hpet.h>
 #include <arch/x86/arch_system_info.h>
@@ -40,13 +41,15 @@ hpet_init(void)
 	TRACE(("hpet_init: Looking for HPET...\n"));
 	acpi_hpet *hpet = (acpi_hpet *)acpi_find_table(ACPI_HPET_SIGNATURE);
 
+	// Clear hpet kernel args to known invalid state;
+	gKernelArgs.arch_args.hpet_phys = 0;
+	gKernelArgs.arch_args.hpet = NULL;
+
 	if (hpet == NULL) {
 		// No HPET table in the RSDT.
 		// Since there are no other methods for finding it,
 		// assume we don't have one.
 		TRACE(("hpet_init: HPET not found.\n"));
-		gKernelArgs.arch_args.hpet_phys = 0;
-		gKernelArgs.arch_args.hpet = NULL;
 		return;
 	}
 
@@ -60,5 +63,6 @@ hpet_init(void)
 void
 arch_timer_init(void)
 {
+	calculate_cpu_conversion_factor(2);
 	hpet_init();
 }

src/system/boot/platform/efi/cpu.cpp

@@ -8,14 +8,11 @@
 #include <boot/kernel_args.h>
 #include <boot/stage2.h>
 #include <arch/cpu.h>
-#include <arch/x86/arch_cpu.h>
 
 
-extern "C" void
+void
 cpu_init()
 {
-	calculate_cpu_conversion_factor(2);
-
 	gKernelArgs.num_cpus = 1;
 		// this will eventually be corrected later on
 }

src/system/boot/platform/efi/cpu.h

@@ -0,0 +1,12 @@
+/*
+ * Copyright 2019-2020, Haiku, Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _EFI_CPU_H
+#define _EFI_CPU_H
+
+
+void cpu_init(void);
+
+
+#endif /* _EFI_CPU_H */

src/system/boot/platform/efi/start.cpp

@@ -14,7 +14,6 @@
 #include <arch/cpu.h>
 #include <kernel.h>
 
-#include <boot/arch/x86/arch_cpu.h>
 #include <boot/kernel_args.h>
 #include <boot/platform.h>
 #include <boot/stage2.h>
@@ -23,6 +22,7 @@
 #include "arch_start.h"
 #include "acpi.h"
 #include "console.h"
+#include "cpu.h"
 #include "efi_platform.h"
 #include "mmu.h"
 #include "quirks.h"
@@ -195,12 +195,6 @@ efi_main(efi_handle image, efi_system_table *systemTable)
 	// disable apm in case we ever load a 32-bit kernel...
 	gKernelArgs.platform_args.apm.version = 0;
 
-	gKernelArgs.num_cpus = 1;
-	#if defined(__x86_64__) || defined(__x86__)
-	gKernelArgs.arch_args.hpet_phys = 0;
-	gKernelArgs.arch_args.hpet = NULL;
-	#endif
-
 	cpu_init();
 	acpi_init();
 	timer_init();

src/system/ldscripts/arm/boot_loader_efi.ld

@@ -0,0 +1,66 @@
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+ENTRY(_start)
+SECTIONS
+{
+  .text 0x0 : {
+    _text = .;
+    *(.text.head)
+    *(.text)
+    *(.text.*)
+    *(.gnu.linkonce.t.*)
+    *(.srodata)
+    *(.rodata*)
+    . = ALIGN(16);
+  }
+  _etext = .;
+  _text_size = . - _text;
+  .dynamic  : { *(.dynamic) }
+  .data :
+  {
+   __ctor_list = .;
+   *(.ctors)
+   __ctor_end = .;
+   _data = .;
+   *(.sdata)
+   *(.data)
+   *(.data1)
+   *(.data.*)
+   *(.got.plt)
+   *(.got)
+
+   /* the EFI loader doesn't seem to like a .bss section, so we stick
+      it all into .data: */
+   . = ALIGN(16);
+   _bss = .;
+   *(.sbss)
+   *(.scommon)
+   *(.dynbss)
+   *(.bss)
+   *(.bss.*)
+   *(COMMON)
+   . = ALIGN(16);
+   _bss_end = .;
+  }
+
+  .rel.dyn : { *(.rel.dyn) }
+  .rel.plt : { *(.rel.plt) }
+  .rel.got : { *(.rel.got) }
+  .rel.data : { *(.rel.data) *(.rel.data*) }
+  _edata = .;
+  _data_size = . - _etext;
+
+  . = ALIGN(4096);
+  .dynsym   : { *(.dynsym) }
+  . = ALIGN(4096);
+  .dynstr   : { *(.dynstr) }
+  . = ALIGN(4096);
+  .note.gnu.build-id : { *(.note.gnu.build-id) }
+  /DISCARD/ :
+  {
+    *(.rel.reloc)
+    *(.eh_frame)
+    *(.note.GNU-stack)
+  }
+  .comment 0 : { *(.comment) }
+}