[PATCH] ARM26 architecture update

MAINTAINERS

@@ -245,6 +245,21 @@ M:	jschlst@samba.org
 L:	linux-atalk@lists.netspace.org
 S:	Maintained
 
+ARM26 ARCHITECTURE
+P:	Ian Molton
+M:	spyro@f2s.com
+S:	Maintained
+
+ARM26/ARCHIMEDES
+P:	Ian Molton
+M:	spyro@f2s.com
+S:	Maintained
+
+ARM26/A5000
+P:	John Appleby
+M:	john@dnsworld.co.uk
+S:	Maintained
+
 ARM MFM AND FLOPPY DRIVERS
 P:	Dave Gilbert
 M:	linux@treblig.org

arch/arm26/Kconfig

@@ -8,15 +8,8 @@ mainmenu "Linux Kernel Configuration"
 config ARM
 	bool
 	default y
-	help
-	  The ARM series is a line of low-power-consumption RISC chip designs
-	  licensed by ARM ltd and targeted at embedded applications and
-	  handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
-	  manufactured, but  legacy ARM-based PC hardware remains popular in
-	  Europe.  There is an ARM Linux project with a web page at
-	  <http://www.arm.linux.org.uk/>.
-
-config ARCH_ARCA5K
+
+config ARM26
 	bool
 	default y
 
@@ -67,25 +60,25 @@ comment "Archimedes/A5000 Implementations (select only ONE)"
 
 config ARCH_ARC
         bool "Archimedes"
-        depends on ARCH_ARCA5K
         help
-          The Acorn Archimedes was an personal computer based on an 8K ARM2
-          processor, released in 1987.  It supported 512K of RAM and 2 800K
-          floppy disks.  Picture and more detailed specifications at
-          <http://www.computingmuseum.com/museum/archi.htm>.
+          Say Y to support the Acorn Archimedes.
+	  
+	  The Acorn Archimedes was an personal computer based on an 8MHz ARM2
+          processor, released in 1987.  It supported up to 16MB of RAM in
+	  later models and floppy, harddisc, ethernet etc.
 
 config ARCH_A5K
         bool "A5000"
-        depends on ARCH_ARCA5K
         help
-          Say Y here to to support the Acorn A5000.  Linux can support the
+          Say Y here to to support the Acorn A5000.
+	  
+	  Linux can support the
           internal IDE disk and CD-ROM interface, serial and parallel port,
           and the floppy drive.  Note that on some A5000s the floppy is
           plugged into the wrong socket on the motherboard.
 
 config PAGESIZE_16
-        bool "2MB physical memory"
-        depends on ARCH_ARCA5K
+        bool "2MB physical memory (broken)"
         help
           Say Y here if your Archimedes or A5000 system has only 2MB of
           memory, otherwise say N.  The resulting kernel will not run on a
@@ -186,81 +179,7 @@ config KCORE_AOUT
 
 endchoice
 
-config BINFMT_AOUT
-	tristate "Kernel support for a.out binaries"
-	---help---
-	  A.out (Assembler.OUTput) is a set of formats for libraries and
-	  executables used in the earliest versions of UNIX. Linux used the
-	  a.out formats QMAGIC and ZMAGIC until they were replaced with the
-	  ELF format.
-
-	  As more and more programs are converted to ELF, the use for a.out
-	  will gradually diminish. If you disable this option it will reduce
-	  your kernel by one page. This is not much and by itself does not
-	  warrant removing support. However its removal is a good idea if you
-	  wish to ensure that absolutely none of your programs will use this
-	  older executable format. If you don't know what to answer at this
-	  point then answer Y. If someone told you "You need a kernel with
-	  QMAGIC support" then you'll have to say Y here. You may answer M to
-	  compile a.out support as a module and later load the module when you
-	  want to use a program or library in a.out format. The module will be
-	  called binfmt_aout. Saying M or N here is dangerous though,
-	  because some crucial programs on your system might still be in A.OUT
-	  format.
-
-config BINFMT_ELF
-	tristate "Kernel support for ELF binaries"
-	---help---
-	  ELF (Executable and Linkable Format) is a format for libraries and
-	  executables used across different architectures and operating
-	  systems. Saying Y here will enable your kernel to run ELF binaries
-	  and enlarge it by about 13 KB. ELF support under Linux has now all
-	  but replaced the traditional Linux a.out formats (QMAGIC and ZMAGIC)
-	  because it is portable (this does *not* mean that you will be able
-	  to run executables from different architectures or operating systems
-	  however) and makes building run-time libraries very easy. Many new
-	  executables are distributed solely in ELF format. You definitely
-	  want to say Y here.
-
-	  Information about ELF is contained in the ELF HOWTO available from
-	  <http://www.linuxdoc.org/docs.html#howto>.
-
-	  If you find that after upgrading from Linux kernel 1.2 and saying Y
-	  here, you still can't run any ELF binaries (they just crash), then
-	  you'll have to install the newest ELF runtime libraries, including
-	  ld.so (check the file <file:Documentation/Changes> for location and
-	  latest version).
-
-	  If you want to compile this as a module ( = code which can be
-	  inserted in and removed from the running kernel whenever you want),
-	  say M here and read <file:Documentation/modules.txt>.  The module
-	  will be called binfmt_elf. Saying M or N here is dangerous because
-	  some crucial programs on your system might be in ELF format.
-
-config BINFMT_MISC
-	tristate "Kernel support for MISC binaries"
-	---help---
-	  If you say Y here, it will be possible to plug wrapper-driven binary
-	  formats into the kernel. You will like this especially when you use
-	  programs that need an interpreter to run like Java, Python or
-	  Emacs-Lisp. It's also useful if you often run DOS executables under
-	  the Linux DOS emulator DOSEMU (read the DOSEMU-HOWTO, available from
-	  <http://www.linuxdoc.org/docs.html#howto>). Once you have
-	  registered such a binary class with the kernel, you can start one of
-	  those programs simply by typing in its name at a shell prompt; Linux
-	  will automatically feed it to the correct interpreter.
-
-	  You can do other nice things, too. Read the file
-	  <file:Documentation/binfmt_misc.txt> to learn how to use this
-	  feature, and <file:Documentation/java.txt> for information about how
-	  to include Java support.
-
-	  You must say Y to "/proc file system support" (CONFIG_PROC_FS) to
-	  use this part of the kernel.
-
-	  You may say M here for module support and later load the module when
-	  you have use for it; the module is called binfmt_misc. If you
-	  don't know what to answer at this point, say Y.
+source "fs/Kconfig.binfmt"
 
 config PREEMPT
 	bool "Preemptible Kernel (EXPERIMENTAL)"
@@ -311,59 +230,8 @@ source "net/Kconfig"
 
 source "net/irda/Kconfig"
 
-menu "ATA/ATAPI/MFM/RLL support"
-
-config IDE
-	tristate "ATA/ATAPI/MFM/RLL support"
-	---help---
-	  If you say Y here, your kernel will be able to manage low cost mass
-	  storage units such as ATA/(E)IDE and ATAPI units. The most common
-	  cases are IDE hard drives and ATAPI CD-ROM drives.
-
-	  If your system is pure SCSI and doesn't use these interfaces, you
-	  can say N here.
-
-	  Integrated Disk Electronics (IDE aka ATA-1) is a connecting standard
-	  for mass storage units such as hard disks. It was designed by
-	  Western Digital and Compaq Computer in 1984. It was then named
-	  ST506. Quite a number of disks use the IDE interface.
-
-	  AT Attachment (ATA) is the superset of the IDE specifications.
-	  ST506 was also called ATA-1.
-
-	  Fast-IDE is ATA-2 (also named Fast ATA), Enhanced IDE (EIDE) is
-	  ATA-3. It provides support for larger disks (up to 8.4GB by means of
-	  the LBA standard), more disks (4 instead of 2) and for other mass
-	  storage units such as tapes and cdrom. UDMA/33 (aka UltraDMA/33) is
-	  ATA-4 and provides faster (and more CPU friendly) transfer modes
-	  than previous PIO (Programmed processor Input/Output) from previous
-	  ATA/IDE standards by means of fast DMA controllers.
-
-	  ATA Packet Interface (ATAPI) is a protocol used by EIDE tape and
-	  CD-ROM drives, similar in many respects to the SCSI protocol.
-
-	  SMART IDE (Self Monitoring, Analysis and Reporting Technology) was
-	  designed in order to prevent data corruption and disk crash by
-	  detecting pre hardware failure conditions (heat, access time, and
-	  the like...). Disks built since June 1995 may follow this standard.
-	  The kernel itself don't manage this; however there are quite a
-	  number of user programs such as smart that can query the status of
-	  SMART parameters disk.
-
-	  If you want to compile this driver as a module ( = code which can be
-	  inserted in and removed from the running kernel whenever you want),
-	  say M here and read <file:Documentation/modules.txt>. The module
-	  will be called ide.
-
-	  For further information, please read <file:Documentation/ide.txt>.
-
-	  If unsure, say Y.
-
 source "drivers/ide/Kconfig"
 
-endmenu
-
-
 source "drivers/scsi/Kconfig"
 
 source "drivers/isdn/Kconfig"

arch/arm26/config.in

-#
-# For a description of the syntax of this configuration file,
-# see Documentation/kbuild/config-language.txt.
-#
-mainmenu_name "Linux Kernel Configuration"
-
-define_bool CONFIG_ARM y
-define_bool CONFIG_EISA n
-define_bool CONFIG_SBUS n
-define_bool CONFIG_MCA n
-define_bool CONFIG_UID16 y
-define_bool CONFIG_RWSEM_GENERIC_SPINLOCK y
-define_bool CONFIG_RWSEM_XCHGADD_ALGORITHM n
-define_bool CONFIG_GENERIC_BUST_SPINLOCK n
-define_bool CONFIG_GENERIC_ISA_DMA n
-
-source init/Config.in
-
-mainmenu_option next_comment
-comment 'System Type'
-
-define_bool CONFIG_ARCH_ARCA5K
-bool '  Archimedes' CONFIG_ARCH_ARC
-bool '  A5000' CONFIG_ARCH_A5K
-
-# Definitions to make life easier
-define_bool CONFIG_ARCH_ACORN y
-define_bool CONFIG_CPU_32 n
-define_bool CONFIG_CPU_26 y
-bool '2MB physical memory' CONFIG_PAGESIZE_16
-
-endmenu
-
-mainmenu_option next_comment
-comment 'General setup'
-
-define_bool CONFIG_FIQ y
-
-# Compressed boot loader in ROM.  Yes, we really want to ask about
-# TEXT and BSS so we preserve their values in the config files.
-bool 'Compressed boot loader in ROM/flash' CONFIG_ZBOOT_ROM
-hex 'Compressed ROM boot loader base address' CONFIG_ZBOOT_ROM_TEXT 0
-hex 'Compressed ROM boot loader BSS address' CONFIG_ZBOOT_ROM_BSS 0
-
-comment 'At least one math emulation must be selected'
-define_bool CONFIG_FPE_NWFPE y
-choice 'Kernel core (/proc/kcore) format' \
-	"ELF		CONFIG_KCORE_ELF	\
-	 A.OUT		CONFIG_KCORE_AOUT" ELF
-tristate 'Kernel support for a.out binaries' CONFIG_BINFMT_AOUT
-tristate 'Kernel support for ELF binaries' CONFIG_BINFMT_ELF
-tristate 'Kernel support for MISC binaries' CONFIG_BINFMT_MISC
-string 'Default kernel command string' CONFIG_CMDLINE ""
-
-define_bool CONFIG_ALIGNMENT_TRAP n
-endmenu
-
-source drivers/parport/Config.in
-source drivers/pnp/Config.in
-source drivers/block/Config.in
-source drivers/md/Config.in
-source drivers/acorn/block/Config.in
-
-if [ "$CONFIG_NET" = "y" ]; then
-   source net/Config.in
-
-   mainmenu_option next_comment
-   comment 'Network device support'
-
-   bool 'Network device support' CONFIG_NETDEVICES
-   if [ "$CONFIG_NETDEVICES" = "y" ]; then
-      source drivers/net/Config.in
-   fi
-   endmenu
-fi
-
-mainmenu_option next_comment
-comment 'ATA/ATAPI/MFM/RLL support'
-
-tristate 'ATA/ATAPI/MFM/RLL support' CONFIG_IDE
-
-if [ "$CONFIG_IDE" != "n" ]; then
-  source drivers/ide/Config.in
-else
-  define_bool CONFIG_BLK_DEV_HD n
-fi
-endmenu
-
-mainmenu_option next_comment
-comment 'SCSI support'
-
-tristate 'SCSI support' CONFIG_SCSI
-endmenu
-
-source drivers/isdn/Config.in
-
-#
-# input before char - char/joystick depends on it. As does USB.
-#
-source drivers/input/Config.in
-
-source drivers/char/Config.in
-if [ "$CONFIG_BUSMOUSE" = "y" ]; then
-   define_bool CONFIG_KBDMOUSE y
-fi
-
-source drivers/media/Config.in
-
-source fs/Config.in
-
-if [ "$CONFIG_VT" = "y" ]; then
-   mainmenu_option next_comment
-   comment 'Console drivers'
-   source drivers/video/Config.in
-   endmenu
-fi
-
-mainmenu_option next_comment
-comment 'Sound'
-
-tristate 'Sound card support' CONFIG_SOUND
-if [ "$CONFIG_SOUND" != "n" ]; then
-   source sound/Config.in
-fi
-endmenu
-
-source drivers/misc/Config.in
-source drivers/usb/Config.in
-
-mainmenu_option next_comment
-comment 'Kernel hacking'
-
-# Always compile kernel with framepointer (until 2.4 real comes out)
-# Bug reports aren't much use without this.
-bool 'Compile kernel without frame pointer' CONFIG_NO_FRAME_POINTER
-bool 'Verbose user fault messages' CONFIG_DEBUG_USER
-bool 'Include debugging information in kernel binary' CONFIG_DEBUG_INFO
-
-bool 'Kernel debugging' CONFIG_DEBUG_KERNEL
-dep_bool '  Debug memory allocations' CONFIG_DEBUG_SLAB $CONFIG_DEBUG_KERNEL
-dep_bool '  Magic SysRq key' CONFIG_MAGIC_SYSRQ $CONFIG_DEBUG_KERNEL
-dep_bool '  Spinlock debugging' CONFIG_DEBUG_SPINLOCK $CONFIG_DEBUG_KERNEL
-dep_bool '  Wait queue debugging' CONFIG_DEBUG_WAITQ $CONFIG_DEBUG_KERNEL
-dep_bool '  Verbose BUG() reporting (adds 70K)' CONFIG_DEBUG_BUGVERBOSE $CONFIG_DEBUG_KERNEL
-dep_bool '  Verbose kernel error messages' CONFIG_DEBUG_ERRORS $CONFIG_DEBUG_KERNEL
-# These options are only for real kernel hackers who want to get their hands dirty. 
-dep_bool '  Kernel low-level debugging functions' CONFIG_DEBUG_LL $CONFIG_DEBUG_KERNEL
-endmenu
-
-source security/Config.in
-source lib/Config.in

arch/arm26/kernel/Makefile

@@ -6,7 +6,7 @@ ENTRY_OBJ = entry.o
 
 # Object file lists.
 
-obj-y		:= arch.o compat.o dma.o entry.o irq.o   \
+obj-y		:= compat.o dma.o entry.o irq.o   \
 		   process.o ptrace.o semaphore.o setup.o signal.o sys_arm.o \
 		   time.o traps.o ecard.o time-acorn.o dma.o \
 		   ecard.o fiq.o time.o

arch/arm26/kernel/arch.c

-/* 
- *  linux/arch/arm/kernel/arch.c
- *
- *  Architecture specific fixups.
- */
-#include <linux/config.h>
-#include <linux/init.h>
-#include <linux/types.h>
-
-#include <asm/elf.h>
-#include <asm/setup.h>
-#include <asm/mach-types.h>
-#include <asm/arch.h>
-#include <asm/page.h>
-
-unsigned int vram_size;
-
-
-unsigned int memc_ctrl_reg;
-unsigned int number_mfm_drives;
-
-static int __init parse_tag_acorn(const struct tag *tag)
-{
-	memc_ctrl_reg = tag->u.acorn.memc_control_reg;
-	number_mfm_drives = tag->u.acorn.adfsdrives;
-	return 0;
-}
-
-__tagtable(ATAG_ACORN, parse_tag_acorn);
-

arch/arm26/kernel/asm-offsets.c

 /*
  * Copyright (C) 1995-2001 Russell King
  *               2001-2002 Keith Owens
- *               2003-?    Ian Molton
+ *               2003      Ian Molton
  *     
  * Generate definitions needed by assembly language modules.
  * This code generates raw asm output which is post-processed to extract

arch/arm26/kernel/compat.c

@@ -26,7 +26,7 @@
 #include <asm/mach-types.h>
 #include <asm/page.h>
 
-#include <asm/arch.h>
+//#include <asm/arch.h>
 //#include <asm/mach/irq.h>
 
 /*

arch/arm26/kernel/dma.c

@@ -2,7 +2,7 @@
  *  linux/arch/arm/kernel/dma.c
  *
  *  Copyright (C) 1995-2000 Russell King
- *                2003-?    Ian Molton
+ *                2003      Ian Molton
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as

arch/arm26/kernel/ecard.c

@@ -11,9 +11,8 @@
  *  Find all installed expansion cards, and handle interrupts from them.
  *
  *  Created from information from Acorns RiscOS3 PRMs
- *
- *  08-Dec-1996	RMK	Added code for the 9'th expansion card - the ether
- *			podule slot.
+ *  15-Jun-2003 IM      Modified from ARM32 (RiscPC capable) version
+ *  10-Jan-1999	RMK	Run loaders in a simulated RISC OS environment.
  *  06-May-1997	RMK	Added blacklist for cards whose loader doesn't work.
  *  12-Sep-1997	RMK	Created new handling of interrupt enables/disables
  *			- cards can now register their own routine to control
@@ -21,10 +20,7 @@
  *  29-Sep-1997	RMK	Expansion card interrupt hardware not being re-enabled
  *			on reset from Linux. (Caused cards not to respond
  *			under RiscOS without hard reset).
- *  15-Feb-1998	RMK	Added DMA support
- *  12-Sep-1998	RMK	Added EASI support
- *  10-Jan-1999	RMK	Run loaders in a simulated RISC OS environment.
- *  17-Apr-1999	RMK	Support for EASI Type C cycles.
+ *
  */
 #define ECARD_C
 
@@ -527,8 +523,7 @@ static int ecard_prints(char *buffer, ecard_t *ec)
 {
 	char *start = buffer;
 
-	buffer += sprintf(buffer, "  %d: %s ", ec->slot_no,
-			  ec->type == ECARD_EASI ? "EASI" : "    ");
+	buffer += sprintf(buffer, "  %d: ", ec->slot_no);
 
 	if (ec->cid.id == 0) {
 		struct in_chunk_dir incd;
@@ -674,7 +669,7 @@ ecard_probe(int slot, card_type_t type)
 	memset(ec, 0, sizeof(ecard_t));
 
 	ec->slot_no	= slot;
-	ec->type	= type;
+	ec->type        = type;
 	ec->irq		= NO_IRQ;
 	ec->fiq		= NO_IRQ;
 	ec->dma		= NO_DMA;
@@ -770,9 +765,8 @@ static int __init ecard_init(void)
 
 	printk("Probing expansion cards\n");
 
-	for (slot = 0; slot < 8; slot ++) {
-		if (ecard_probe(slot, ECARD_EASI) == -ENODEV)
-			ecard_probe(slot, ECARD_IOC);
+	for (slot = 0; slot < 4; slot ++) {
+		ecard_probe(slot, ECARD_IOC);
 	}
 
 	irqhw = ecard_probeirqhw();

arch/arm26/kernel/irq.c

@@ -41,7 +41,7 @@
  * not be set too low to prevent false triggering.  Conversely, if it
  * is set too high, then you could miss a stuck IRQ.
  *
- * Maybe we ought to set a timer and re-enable the IRQ at a later time?
+ * FIXME Maybe we ought to set a timer and re-enable the IRQ at a later time?
  */
 #define MAX_IRQ_CNT	100000
 
@@ -49,7 +49,6 @@ static volatile unsigned long irq_err_count;
 static spinlock_t irq_controller_lock = SPIN_LOCK_UNLOCKED;
 
 struct irqdesc irq_desc[NR_IRQS];
-void (*init_arch_irq)(void) __initdata = NULL;
 
 /*
  * Dummy mask/unmask handler
@@ -88,7 +87,6 @@ void disable_irq(unsigned int irq)
 {
 	struct irqdesc *desc = irq_desc + irq;
 	unsigned long flags;
-
 	spin_lock_irqsave(&irq_controller_lock, flags);
 	if (!desc->depth++)
 		desc->enabled = 0;
@@ -114,7 +112,7 @@ void enable_irq(unsigned int irq)
 	spin_lock_irqsave(&irq_controller_lock, flags);
 	if (unlikely(!desc->depth)) {
 		printk("enable_irq(%u) unbalanced from %p\n", irq,
-			__builtin_return_address(0));
+			__builtin_return_address(0)); //FIXME bum addresses reported - why?
 	} else if (!--desc->depth) {
 		desc->probing = 0;
 		desc->enabled = 1;
@@ -187,7 +185,6 @@ __do_irq(unsigned int irq, struct irqaction *action, struct pt_regs *regs)
 	unsigned int status;
 
 	spin_unlock(&irq_controller_lock);
-
 	if (!(action->flags & SA_INTERRUPT))
 		local_irq_enable();
 
@@ -700,6 +697,6 @@ void __init init_IRQ(void)
 	for (irq = 0, desc = irq_desc; irq < NR_IRQS; irq++, desc++)
 		*desc = bad_irq_desc;
 
-	init_arch_irq();
+	arc_init_irq();
 	init_dma();
 }

arch/arm26/kernel/process.c

@@ -227,7 +227,9 @@ extern void free_page_8k(unsigned long page);
 #define ll_alloc_task_struct()	((struct thread_info *)get_page_8k(GFP_KERNEL))
 #define ll_free_task_struct(p)  free_page_8k((unsigned long)(p))
 
-struct thread_info *alloc_thread_info(void)
+//FIXME - do we use *task param below looks like we dont, which is ok?
+//FIXME - if EXTRA_TASK_STRUCT is zero we can optimise the below away permanently. *IF* its supposed to be zero.
+struct thread_info *alloc_thread_info(struct task_struct *task)
 {
 	struct thread_info *thread = NULL;
 

arch/arm26/kernel/setup.c

@@ -30,7 +30,6 @@
 #include <asm/mach-types.h>
 #include <asm/tlbflush.h>
 
-#include <asm/arch.h>
 #include <asm/irqchip.h>
 
 #ifndef MEM_SIZE
@@ -66,6 +65,8 @@ unsigned int system_rev;
 unsigned int system_serial_low;
 unsigned int system_serial_high;
 unsigned int elf_hwcap;
+unsigned int memc_ctrl_reg;
+unsigned int number_mfm_drives;
 
 struct processor processor;
 
@@ -147,33 +148,6 @@ static void __init setup_processor(void)
 	cpu_proc_init();
 }
 
-static struct machine_desc * __init setup_machine(unsigned int nr)
-{
-	extern struct machine_desc __arch_info_begin, __arch_info_end;
-	struct machine_desc *list;
-
-	/*
-	 * locate architecture in the list of supported architectures.
-	 */
-	for (list = &__arch_info_begin; list < &__arch_info_end; list++)
-		if (list->nr == nr)
-			break;
-
-	/*
-	 * If the architecture type is not recognised, then we
-	 * can co nothing...
-	 */
-	if (list >= &__arch_info_end) {
-		printk("Architecture configuration botched (nr %d), unable "
-		       "to continue.\n", nr);
-		while (1);
-	}
-
-	printk("Machine: %s\n", list->name);
-
-	return list;
-}
-
 /*
  * Initial parsing of the command line.  We need to pick out the
  * memory size.  We look for mem=size@start, where start and size
@@ -239,7 +213,7 @@ setup_ramdisk(int doload, int prompt, int image_start, unsigned int rd_sz)
 }
 
 static void __init
-request_standard_resources(struct meminfo *mi, struct machine_desc *mdesc)
+request_standard_resources(struct meminfo *mi)
 {
 	struct resource *res;
 	int i;
@@ -274,22 +248,18 @@ request_standard_resources(struct meminfo *mi, struct machine_desc *mdesc)
 			request_resource(res, &kernel_data);
 	}
 
-	if (mdesc->video_start) {
+/*	FIXME - needed? if (mdesc->video_start) {
 		video_ram.start = mdesc->video_start;
 		video_ram.end   = mdesc->video_end;
 		request_resource(&iomem_resource, &video_ram);
-	}
+	}*/
 
 	/*
 	 * Some machines don't have the possibility of ever
-	 * possessing lp0, lp1 or lp2
+	 * possessing lp1 or lp2
 	 */
-	if (mdesc->reserve_lp0)
+	if (0)  /* FIXME - need to do this for A5k at least */
 		request_resource(&ioport_resource, &lp0);
-	if (mdesc->reserve_lp1)
-		request_resource(&ioport_resource, &lp1);
-	if (mdesc->reserve_lp2)
-		request_resource(&ioport_resource, &lp2);
 }
 
 /*
@@ -359,6 +329,15 @@ static int __init parse_tag_videotext(const struct tag *tag)
 __tagtable(ATAG_VIDEOTEXT, parse_tag_videotext);
 #endif
 
+static int __init parse_tag_acorn(const struct tag *tag)
+{
+        memc_ctrl_reg = tag->u.acorn.memc_control_reg;
+        number_mfm_drives = tag->u.acorn.adfsdrives;
+        return 0;
+}
+
+__tagtable(ATAG_ACORN, parse_tag_acorn);
+
 static int __init parse_tag_ramdisk(const struct tag *tag)
 {
 	setup_ramdisk((tag->u.ramdisk.flags & 1) == 0,
@@ -467,15 +446,18 @@ static struct init_tags {
 void __init setup_arch(char **cmdline_p)
 {
 	struct tag *tags = (struct tag *)&init_tags;
-	struct machine_desc *mdesc;
 	char *from = default_command_line;
 
 	setup_processor();
-	mdesc = setup_machine(machine_arch_type);
-	machine_name = mdesc->name;
+	if(machine_arch_type == MACH_TYPE_A5K)
+		machine_name = "A5000";
+	else if(machine_arch_type == MACH_TYPE_ARCHIMEDES)
+		machine_name = "Archimedes";
+	else
+		machine_name = "UNKNOWN";
 
-	if (mdesc->param_offset)
-		tags = (struct tag *)mdesc->param_offset; //FIXME - ugly?
+	//FIXME - this may need altering when we get ROM images working
+	tags = (struct tag *)0x0207c000;
 
 	/*
 	 * If we have the old style parameters, convert them to
@@ -501,12 +483,7 @@ void __init setup_arch(char **cmdline_p)
 	parse_cmdline(&meminfo, cmdline_p, from);
 	bootmem_init(&meminfo);
 	paging_init(&meminfo);
-	request_standard_resources(&meminfo, mdesc);
-
-	/*
-	 * Set up various architecture-specific pointers
-	 */
-	init_arch_irq = mdesc->init_irq;
+	request_standard_resources(&meminfo);
 
 #ifdef CONFIG_VT
 #if defined(CONFIG_DUMMY_CONSOLE)

arch/arm26/kernel/traps.c

@@ -175,6 +175,11 @@ void show_trace_task(struct task_struct *tsk)
 	}
 }
 
+/* FIXME - this is probably wrong.. */
+void show_stack(struct task_struct *task, unsigned long *sp) {
+	dump_mem("Stack: ", (unsigned long)sp, 8192+(unsigned long)task->thread_info);
+}
+
 spinlock_t die_lock = SPIN_LOCK_UNLOCKED;
 
 /*
@@ -497,7 +502,7 @@ baddataabort(int code, unsigned long instr, struct pt_regs *regs)
 	die_if_kernel("unknown data abort code", regs, instr);
 }
 
-void __bug(const char *file, int line, void *data)
+volatile void __bug(const char *file, int line, void *data)
 {
 	printk(KERN_CRIT"kernel BUG at %s:%d!", file, line);
 	if (data)

arch/arm26/lib/Makefile

@@ -4,9 +4,7 @@
 # Copyright (C) 1995-2000 Russell King
 #
 
-L_TARGET	:= lib.a
-
-obj-y		:= backtrace.o changebit.o csumipv6.o csumpartial.o   \
+lib-y		:= backtrace.o changebit.o csumipv6.o csumpartial.o   \
 		   csumpartialcopy.o csumpartialcopyuser.o clearbit.o \
 		   copy_page.o delay.o findbit.o memchr.o memcpy.o    \
 		   memset.o memzero.o setbit.o    \
@@ -16,15 +14,12 @@ obj-y		:= backtrace.o changebit.o csumipv6.o csumpartial.o   \
 		   ucmpdi2.o udivdi3.o lib1funcs.o ecard.o io-acorn.o \
 		   floppydma.o io-readsb.o io-writesb.o io-writesl.o  \
 		   uaccess-kernel.o uaccess-user.o io-readsw-armv3.o  \
-		   io-writesw-armv3.o io-readsl-armv3.o
-
-obj-m		:=
-obj-n		:=
-
-obj-$(CONFIG_VT)+= kbd.o
+		   io-writesw-armv3.o io-readsl-armv3.o ecard.o       \
+		   io-acorn.o floppydma.o
 
-obj-y		+= ecard.o io-acorn.o floppydma.o
+lib-n		:=
 
+lib-$(CONFIG_VT)+= kbd.o
 
 csumpartialcopy.o: csumpartialcopygeneric.S
 csumpartialcopyuser.o: csumpartialcopygeneric.S

arch/arm26/machine/Makefile

@@ -4,7 +4,7 @@
 
 # Object file lists.
 
-obj-y			:= arch.o dma.o irq.o oldlatches.o \
+obj-y			:= dma.o irq.o oldlatches.o \
 			   small_page.o
 
 extra-y 		:= head.o

arch/arm26/machine/arch.c

-/*
- *  linux/arch/arm26/mach-arc/arch.c
- *
- *  Copyright (C) 1998-2001 Russell King
- *  Copyright (C) 2003 Ian Molton
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- *  Architecture specific fixups.
- */
-#include <linux/config.h>
-#include <linux/tty.h>
-#include <linux/init.h>
-
-#include <asm/mach-types.h>
-#include <asm/hardware.h>
-#include <asm/page.h>
-#include <asm/setup.h>
-
-#include <asm/map.h>
-#include <asm/arch.h>
-
-extern void arc_init_irq(void);
-
-#ifdef CONFIG_ARCH_ARC
-MACHINE_START(ARCHIMEDES, "Acorn-Archimedes")
-#elif defined(CONFIG_ARCH_A5K)
-MACHINE_START(A5K, "Acorn-A5000")
-#endif
-	MAINTAINER("Ian Molton")
-	BOOT_PARAMS(0x0207c000)
-	INITIRQ(arc_init_irq)
-MACHINE_END
-

arch/arm26/machine/irq.c

@@ -73,7 +73,6 @@ static struct irqchip arc_a_chip = {
 static void arc_mask_irq_b(unsigned int irq)
 {
 	unsigned int val, mask;
-
 	mask = 1 << (irq & 7);
 	val = ioc_readb(IOC_IRQMASKB);
 	ioc_writeb(val & ~mask, IOC_IRQMASKB);
@@ -94,7 +93,7 @@ static struct irqchip arc_b_chip = {
         .unmask = arc_unmask_irq_b,
 };
 
-/* FIXME - JMA none of these functions are used in arm26
+/* FIXME - JMA none of these functions are used in arm26 currently
 static void arc_mask_irq_fiq(unsigned int irq)
 {
 	unsigned int val, mask;
@@ -124,6 +123,7 @@ void __init arc_init_irq(void)
 {
 	unsigned int irq, flags;
 
+	/* Disable all IOC interrupt sources */
 	ioc_writeb(0, IOC_IRQMASKA);
 	ioc_writeb(0, IOC_IRQMASKB);
 	ioc_writeb(0, IOC_FIQMASK);

arch/arm26/mm/init.c

@@ -32,7 +32,7 @@
 #include <asm/setup.h>
 #include <asm/tlb.h>
 
-#include <asm/arch.h>
+//#include <asm/arch.h>
 #include <asm/map.h>
 
 #define TABLE_SIZE	PTRS_PER_PTE * sizeof(pte_t))

arch/arm26/mm/mm-memc.c

@@ -70,11 +70,9 @@ void free_pgd_slow(pgd_t *pgd)
 
 pgd_t *get_pgd_slow(struct mm_struct *mm)
 {
-	void *pg2k;
 	pgd_t *new_pgd, *init_pgd;
 	pmd_t *new_pmd, *init_pmd;
 	pte_t *new_pte, *init_pte;
-	struct mm_struct bob;
 
 	new_pgd = alloc_pgd_table();
 	if (!new_pgd)

include/asm-arm26/arch.h

-/*
- *  linux/include/asm-arm/mach/arch.h
- *
- *  Copyright (C) 2000 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-/*
- * The size of struct machine_desc
- *   (for assembler code)
- * FIXME - I count 45... or is this padding?
- */
-#define SIZEOF_MACHINE_DESC	48
-
-#ifndef __ASSEMBLY__
-
-struct tag;
-
-struct machine_desc {
-	int			nr; /* arch no FIXME - get rid */
-	const char		*name;		/* architecture name	*/
-	unsigned int		param_offset;	/* parameter page	*/
-
-	unsigned int		video_start;	/* start of video RAM	*/
-	unsigned int		video_end;	/* end of video RAM	*/
-
-	unsigned int		reserve_lp0 :1;	/* never has lp0	*/
-	unsigned int		reserve_lp1 :1;	/* never has lp1	*/
-	unsigned int		reserve_lp2 :1;	/* never has lp2	*/
-	unsigned int		soft_reboot :1;	/* soft reboot		*/
-	void			(*fixup)(struct machine_desc *,
-					 struct tag *, char **,
-					 struct meminfo *);
-	void			(*map_io)(void);/* IO mapping function	*/
-	void			(*init_irq)(void);
-};
-
-/*
- * Set of macros to define architecture features.  This is built into
- * a table by the linker.
- */
-#define MACHINE_START(_type,_name)		\
-const struct machine_desc __mach_desc_##_type	\
- __attribute__((__section__(".arch.info"))) = {	\
-	nr:		MACH_TYPE_##_type,	\
-	name:		_name,
-
-#define MAINTAINER(n)
-
-#define BOOT_PARAMS(_params)			\
-	param_offset:	_params,
-
-#define INITIRQ(_func)				\
-	init_irq:	_func,
-
-#define MACHINE_END				\
-};
-
-#endif

include/asm-arm26/bug.h

@@ -4,7 +4,7 @@
 #include <linux/config.h>
 
 #ifdef CONFIG_DEBUG_BUGVERBOSE
-extern void __bug(const char *file, int line, void *data);
+extern volatile void __bug(const char *file, int line, void *data);
 
 /* give file/line information */
 #define BUG()		__bug(__FILE__, __LINE__, NULL)
@@ -18,4 +18,13 @@ extern void __bug(const char *file, int line, void *data);
 
 #endif
 
+#define BUG_ON(condition) do { if (unlikely((condition)!=0)) BUG(); } while(0)
+
+#define WARN_ON(condition) do { \
+	if (unlikely((condition)!=0)) { \
+		printk("Badness in %s at %s:%d\n", __FUNCTION__, __FILE__, __LINE__); \
+		dump_stack(); \
+	} \
+} while (0)
+
 #endif

include/asm-arm26/bugs.h

 /*
- *  linux/include/asm-arm/bugs.h
+ *  linux/include/asm-arm26/bugs.h
  *
  *  Copyright (C) 1995  Russell King
  *

include/asm-arm26/ecard.h

@@ -26,6 +26,9 @@
 #define PROD_ACORN_ETHER1		0x0003
 #define PROD_ACORN_MFM			0x000b
 
+#define MANU_CCONCEPTS		0x0009
+#define PROD_CCONCEPTS_COLOURCARD	0x0050
+
 #define MANU_ANT2		0x0011
 #define PROD_ANT_ETHER3			0x00a4
 

include/asm-arm26/mach-types.h

 /*
  * Unlike ARM32 this is NOT automatically generated. DONT delete it
+ * Instead, consider FIXME-ing it so its auto-detected.
  */
 
 #ifndef __ASM_ARM_MACH_TYPE_H

include/asm-arm26/pgalloc.h

@@ -55,9 +55,9 @@ pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
  * is thrown away. It just cant be zero. -IM
  */
 
-#define pmd_alloc_one(mm,addr)		((pmd_t *)2); BUG()
+#define pmd_alloc_one(mm,addr)		({ BUG(); ((pmd_t *)2); })
 #define pmd_free(pmd)			do { } while (0)
-#define pgd_populate(mm,pmd,pte)	(0)
+#define pgd_populate(mm,pmd,pte)	BUG()
 
 extern pgd_t *get_pgd_slow(struct mm_struct *mm);
 extern void free_pgd_slow(pgd_t *pgd);

include/asm-arm26/pgtable.h

@@ -179,7 +179,7 @@ extern struct page *empty_zero_page;
 /* Is pmd_page supposed to return a pointer to a page in some arches? ours seems to
  * return a pointer to memory (no special alignment)
  */
-#define pmd_page(pmd)  ((unsigned long)(pmd_val((pmd)) & ~_PMD_PRESENT))
+#define pmd_page(pmd)  ((struct page *)(pmd_val((pmd)) & ~_PMD_PRESENT))
 #define pmd_page_kernel(pmd) ((pte_t *)(pmd_val((pmd)) & ~_PMD_PRESENT))
 
 #define pte_offset_kernel(dir,addr)     (pmd_page_kernel(*(dir)) + __pte_index(addr))

include/asm-arm26/statfs.h

 #ifndef _ASMARM_STATFS_H
 #define _ASMARM_STATFS_H
 
-#ifndef __KERNEL_STRICT_NAMES
+//FIXME - this may not be appropriate for arm26. check it out.
 
-#include <linux/types.h>
-
-typedef __kernel_fsid_t	fsid_t;
-
-#endif
-
-struct statfs {
-	long f_type;
-	long f_bsize;
-	long f_blocks;
-	long f_bfree;
-	long f_bavail;
-	long f_files;
-	long f_ffree;
-	__kernel_fsid_t f_fsid;
-	long f_namelen;
-	long f_spare[6];
-};
+#include <asm-generic/statfs.h>
 
 #endif

include/asm-arm26/thread_info.h

@@ -85,7 +85,7 @@ static inline struct thread_info *current_thread_info(void)
 //#define INIT_THREAD_SIZE        (65536)
 #define __get_user_regs(x) (((struct pt_regs *)((unsigned long)(x) + THREAD_SIZE - 8)) - 1)
 
-extern struct thread_info *alloc_thread_info(void);
+extern struct thread_info *alloc_thread_info(struct task_struct *task);
 extern void free_thread_info(struct thread_info *);
 
 #define get_thread_info(ti)	get_task_struct((ti)->task)