m68k: merge m68k and m68knommu arch directories

There is a lot of common code that could be shared between the m68k
and m68knommu arch branches. It makes sense to merge the two branches
into a single directory structure so that we can more easily share
that common code.

This is a brute force merge, based on a script from Stephen King
<sfking@fdwdc.com>, which was originally written by Arnd Bergmann
<arnd@arndb.de>.

> The script was inspired by the script Sam Ravnborg used to merge the
> includes from m68knommu. For those files common to both arches but
> differing in content, the m68k version of the file is renamed to
> <file>_mm.<ext> and the m68knommu version of the file is moved into the
> corresponding m68k directory and renamed <file>_no.<ext> and a small
> wrapper file <file>.<ext> is used to select between the two version. Files
> that are common to both but don't differ are removed from the m68knommu
> tree and files and directories that are unique to the m68knommu tree are
> moved to the m68k tree. Finally, the arch/m68knommu tree is removed.
>
> To select between the the versions of the files, the wrapper uses
>
> #ifdef CONFIG_MMU
> #include <file>_mm.<ext>
> #else
> #include <file>_no.<ext>
> #endif

On top of this file merge I have done a simplistic merge of m68k and
m68knommu Kconfig, which primarily attempts to keep existing options and
menus in place. Other than a handful of options being moved it produces
identical .config outputs on m68k and m68knommu targets I tested it on.

With this in place there is now quite a bit of scope for merge cleanups
in future patches.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>

1 files changed, 533 insertions, 0 deletions

diff --git a/arch/m68k/kernel/setup_mm.c b/arch/m68k/kernel/setup_mm.c
new file mode 100644
index 00000000000..334d8364037
--- /dev/null
+++ b/arch/m68k/kernel/setup_mm.c
@@ -0,0 +1,533 @@
+/*
+ *  linux/arch/m68k/kernel/setup.c
+ *
+ *  Copyright (C) 1995  Hamish Macdonald
+ */
+
+/*
+ * This file handles the architecture-dependent parts of system setup
+ */
+
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/fs.h>
+#include <linux/console.h>
+#include <linux/genhd.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/module.h>
+#include <linux/initrd.h>
+
+#include <asm/bootinfo.h>
+#include <asm/sections.h>
+#include <asm/setup.h>
+#include <asm/fpu.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/machdep.h>
+#ifdef CONFIG_AMIGA
+#include <asm/amigahw.h>
+#endif
+#ifdef CONFIG_ATARI
+#include <asm/atarihw.h>
+#include <asm/atari_stram.h>
+#endif
+#ifdef CONFIG_SUN3X
+#include <asm/dvma.h>
+#endif
+#include <asm/natfeat.h>
+
+#if !FPSTATESIZE || !NR_IRQS
+#warning No CPU/platform type selected, your kernel will not work!
+#warning Are you building an allnoconfig kernel?
+#endif
+
+unsigned long m68k_machtype;
+EXPORT_SYMBOL(m68k_machtype);
+unsigned long m68k_cputype;
+EXPORT_SYMBOL(m68k_cputype);
+unsigned long m68k_fputype;
+unsigned long m68k_mmutype;
+EXPORT_SYMBOL(m68k_mmutype);
+#ifdef CONFIG_VME
+unsigned long vme_brdtype;
+EXPORT_SYMBOL(vme_brdtype);
+#endif
+
+int m68k_is040or060;
+EXPORT_SYMBOL(m68k_is040or060);
+
+extern unsigned long availmem;
+
+int m68k_num_memory;
+EXPORT_SYMBOL(m68k_num_memory);
+int m68k_realnum_memory;
+EXPORT_SYMBOL(m68k_realnum_memory);
+unsigned long m68k_memoffset;
+struct mem_info m68k_memory[NUM_MEMINFO];
+EXPORT_SYMBOL(m68k_memory);
+
+struct mem_info m68k_ramdisk;
+
+static char m68k_command_line[CL_SIZE];
+
+void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
+/* machine dependent irq functions */
+void (*mach_init_IRQ) (void) __initdata = NULL;
+void (*mach_get_model) (char *model);
+void (*mach_get_hardware_list) (struct seq_file *m);
+/* machine dependent timer functions */
+unsigned long (*mach_gettimeoffset) (void);
+int (*mach_hwclk) (int, struct rtc_time*);
+EXPORT_SYMBOL(mach_hwclk);
+int (*mach_set_clock_mmss) (unsigned long);
+unsigned int (*mach_get_ss)(void);
+int (*mach_get_rtc_pll)(struct rtc_pll_info *);
+int (*mach_set_rtc_pll)(struct rtc_pll_info *);
+EXPORT_SYMBOL(mach_get_ss);
+EXPORT_SYMBOL(mach_get_rtc_pll);
+EXPORT_SYMBOL(mach_set_rtc_pll);
+void (*mach_reset)( void );
+void (*mach_halt)( void );
+void (*mach_power_off)( void );
+long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
+#ifdef CONFIG_HEARTBEAT
+void (*mach_heartbeat) (int);
+EXPORT_SYMBOL(mach_heartbeat);
+#endif
+#ifdef CONFIG_M68K_L2_CACHE
+void (*mach_l2_flush) (int);
+#endif
+#if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
+void (*mach_beep)(unsigned int, unsigned int);
+EXPORT_SYMBOL(mach_beep);
+#endif
+#if defined(CONFIG_ISA) && defined(MULTI_ISA)
+int isa_type;
+int isa_sex;
+EXPORT_SYMBOL(isa_type);
+EXPORT_SYMBOL(isa_sex);
+#endif
+
+extern int amiga_parse_bootinfo(const struct bi_record *);
+extern int atari_parse_bootinfo(const struct bi_record *);
+extern int mac_parse_bootinfo(const struct bi_record *);
+extern int q40_parse_bootinfo(const struct bi_record *);
+extern int bvme6000_parse_bootinfo(const struct bi_record *);
+extern int mvme16x_parse_bootinfo(const struct bi_record *);
+extern int mvme147_parse_bootinfo(const struct bi_record *);
+extern int hp300_parse_bootinfo(const struct bi_record *);
+extern int apollo_parse_bootinfo(const struct bi_record *);
+
+extern void config_amiga(void);
+extern void config_atari(void);
+extern void config_mac(void);
+extern void config_sun3(void);
+extern void config_apollo(void);
+extern void config_mvme147(void);
+extern void config_mvme16x(void);
+extern void config_bvme6000(void);
+extern void config_hp300(void);
+extern void config_q40(void);
+extern void config_sun3x(void);
+
+#define MASK_256K 0xfffc0000
+
+extern void paging_init(void);
+
+static void __init m68k_parse_bootinfo(const struct bi_record *record)
+{
+	while (record->tag != BI_LAST) {
+		int unknown = 0;
+		const unsigned long *data = record->data;
+
+		switch (record->tag) {
+		case BI_MACHTYPE:
+		case BI_CPUTYPE:
+		case BI_FPUTYPE:
+		case BI_MMUTYPE:
+			/* Already set up by head.S */
+			break;
+
+		case BI_MEMCHUNK:
+			if (m68k_num_memory < NUM_MEMINFO) {
+				m68k_memory[m68k_num_memory].addr = data[0];
+				m68k_memory[m68k_num_memory].size = data[1];
+				m68k_num_memory++;
+			} else
+				printk("m68k_parse_bootinfo: too many memory chunks\n");
+			break;
+
+		case BI_RAMDISK:
+			m68k_ramdisk.addr = data[0];
+			m68k_ramdisk.size = data[1];
+			break;
+
+		case BI_COMMAND_LINE:
+			strlcpy(m68k_command_line, (const char *)data,
+				sizeof(m68k_command_line));
+			break;
+
+		default:
+			if (MACH_IS_AMIGA)
+				unknown = amiga_parse_bootinfo(record);
+			else if (MACH_IS_ATARI)
+				unknown = atari_parse_bootinfo(record);
+			else if (MACH_IS_MAC)
+				unknown = mac_parse_bootinfo(record);
+			else if (MACH_IS_Q40)
+				unknown = q40_parse_bootinfo(record);
+			else if (MACH_IS_BVME6000)
+				unknown = bvme6000_parse_bootinfo(record);
+			else if (MACH_IS_MVME16x)
+				unknown = mvme16x_parse_bootinfo(record);
+			else if (MACH_IS_MVME147)
+				unknown = mvme147_parse_bootinfo(record);
+			else if (MACH_IS_HP300)
+				unknown = hp300_parse_bootinfo(record);
+			else if (MACH_IS_APOLLO)
+				unknown = apollo_parse_bootinfo(record);
+			else
+				unknown = 1;
+		}
+		if (unknown)
+			printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
+			       record->tag);
+		record = (struct bi_record *)((unsigned long)record +
+					      record->size);
+	}
+
+	m68k_realnum_memory = m68k_num_memory;
+#ifdef CONFIG_SINGLE_MEMORY_CHUNK
+	if (m68k_num_memory > 1) {
+		printk("Ignoring last %i chunks of physical memory\n",
+		       (m68k_num_memory - 1));
+		m68k_num_memory = 1;
+	}
+#endif
+}
+
+void __init setup_arch(char **cmdline_p)
+{
+	int i;
+
+	/* The bootinfo is located right after the kernel bss */
+	m68k_parse_bootinfo((const struct bi_record *)_end);
+
+	if (CPU_IS_040)
+		m68k_is040or060 = 4;
+	else if (CPU_IS_060)
+		m68k_is040or060 = 6;
+
+	/* FIXME: m68k_fputype is passed in by Penguin booter, which can
+	 * be confused by software FPU emulation. BEWARE.
+	 * We should really do our own FPU check at startup.
+	 * [what do we do with buggy 68LC040s? if we have problems
+	 *  with them, we should add a test to check_bugs() below] */
+#ifndef CONFIG_M68KFPU_EMU_ONLY
+	/* clear the fpu if we have one */
+	if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
+		volatile int zero = 0;
+		asm volatile ("frestore %0" : : "m" (zero));
+	}
+#endif
+
+	if (CPU_IS_060) {
+		u32 pcr;
+
+		asm (".chip 68060; movec %%pcr,%0; .chip 68k"
+		     : "=d" (pcr));
+		if (((pcr >> 8) & 0xff) <= 5) {
+			printk("Enabling workaround for errata I14\n");
+			asm (".chip 68060; movec %0,%%pcr; .chip 68k"
+			     : : "d" (pcr | 0x20));
+		}
+	}
+
+	init_mm.start_code = PAGE_OFFSET;
+	init_mm.end_code = (unsigned long)_etext;
+	init_mm.end_data = (unsigned long)_edata;
+	init_mm.brk = (unsigned long)_end;
+
+	*cmdline_p = m68k_command_line;
+	memcpy(boot_command_line, *cmdline_p, CL_SIZE);
+
+	parse_early_param();
+
+#ifdef CONFIG_DUMMY_CONSOLE
+	conswitchp = &dummy_con;
+#endif
+
+	switch (m68k_machtype) {
+#ifdef CONFIG_AMIGA
+	case MACH_AMIGA:
+		config_amiga();
+		break;
+#endif
+#ifdef CONFIG_ATARI
+	case MACH_ATARI:
+		config_atari();
+		break;
+#endif
+#ifdef CONFIG_MAC
+	case MACH_MAC:
+		config_mac();
+		break;
+#endif
+#ifdef CONFIG_SUN3
+	case MACH_SUN3:
+		config_sun3();
+		break;
+#endif
+#ifdef CONFIG_APOLLO
+	case MACH_APOLLO:
+		config_apollo();
+		break;
+#endif
+#ifdef CONFIG_MVME147
+	case MACH_MVME147:
+		config_mvme147();
+		break;
+#endif
+#ifdef CONFIG_MVME16x
+	case MACH_MVME16x:
+		config_mvme16x();
+		break;
+#endif
+#ifdef CONFIG_BVME6000
+	case MACH_BVME6000:
+		config_bvme6000();
+		break;
+#endif
+#ifdef CONFIG_HP300
+	case MACH_HP300:
+		config_hp300();
+		break;
+#endif
+#ifdef CONFIG_Q40
+	case MACH_Q40:
+		config_q40();
+		break;
+#endif
+#ifdef CONFIG_SUN3X
+	case MACH_SUN3X:
+		config_sun3x();
+		break;
+#endif
+	default:
+		panic("No configuration setup");
+	}
+
+#ifdef CONFIG_NATFEAT
+	nf_init();
+#endif
+
+	paging_init();
+
+#ifndef CONFIG_SUN3
+	for (i = 1; i < m68k_num_memory; i++)
+		free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
+				  m68k_memory[i].size);
+#ifdef CONFIG_BLK_DEV_INITRD
+	if (m68k_ramdisk.size) {
+		reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
+				     m68k_ramdisk.addr, m68k_ramdisk.size,
+				     BOOTMEM_DEFAULT);
+		initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
+		initrd_end = initrd_start + m68k_ramdisk.size;
+		printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
+	}
+#endif
+
+#ifdef CONFIG_ATARI
+	if (MACH_IS_ATARI)
+		atari_stram_reserve_pages((void *)availmem);
+#endif
+#ifdef CONFIG_SUN3X
+	if (MACH_IS_SUN3X) {
+		dvma_init();
+	}
+#endif
+
+#endif /* !CONFIG_SUN3 */
+
+/* set ISA defs early as possible */
+#if defined(CONFIG_ISA) && defined(MULTI_ISA)
+	if (MACH_IS_Q40) {
+		isa_type = ISA_TYPE_Q40;
+		isa_sex = 0;
+	}
+#ifdef CONFIG_AMIGA_PCMCIA
+	if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
+		isa_type = ISA_TYPE_AG;
+		isa_sex = 1;
+	}
+#endif
+#endif
+}
+
+static int show_cpuinfo(struct seq_file *m, void *v)
+{
+	const char *cpu, *mmu, *fpu;
+	unsigned long clockfreq, clockfactor;
+
+#define LOOP_CYCLES_68020	(8)
+#define LOOP_CYCLES_68030	(8)
+#define LOOP_CYCLES_68040	(3)
+#define LOOP_CYCLES_68060	(1)
+
+	if (CPU_IS_020) {
+		cpu = "68020";
+		clockfactor = LOOP_CYCLES_68020;
+	} else if (CPU_IS_030) {
+		cpu = "68030";
+		clockfactor = LOOP_CYCLES_68030;
+	} else if (CPU_IS_040) {
+		cpu = "68040";
+		clockfactor = LOOP_CYCLES_68040;
+	} else if (CPU_IS_060) {
+		cpu = "68060";
+		clockfactor = LOOP_CYCLES_68060;
+	} else {
+		cpu = "680x0";
+		clockfactor = 0;
+	}
+
+#ifdef CONFIG_M68KFPU_EMU_ONLY
+	fpu = "none(soft float)";
+#else
+	if (m68k_fputype & FPU_68881)
+		fpu = "68881";
+	else if (m68k_fputype & FPU_68882)
+		fpu = "68882";
+	else if (m68k_fputype & FPU_68040)
+		fpu = "68040";
+	else if (m68k_fputype & FPU_68060)
+		fpu = "68060";
+	else if (m68k_fputype & FPU_SUNFPA)
+		fpu = "Sun FPA";
+	else
+		fpu = "none";
+#endif
+
+	if (m68k_mmutype & MMU_68851)
+		mmu = "68851";
+	else if (m68k_mmutype & MMU_68030)
+		mmu = "68030";
+	else if (m68k_mmutype & MMU_68040)
+		mmu = "68040";
+	else if (m68k_mmutype & MMU_68060)
+		mmu = "68060";
+	else if (m68k_mmutype & MMU_SUN3)
+		mmu = "Sun-3";
+	else if (m68k_mmutype & MMU_APOLLO)
+		mmu = "Apollo";
+	else
+		mmu = "unknown";
+
+	clockfreq = loops_per_jiffy * HZ * clockfactor;
+
+	seq_printf(m, "CPU:\t\t%s\n"
+		   "MMU:\t\t%s\n"
+		   "FPU:\t\t%s\n"
+		   "Clocking:\t%lu.%1luMHz\n"
+		   "BogoMips:\t%lu.%02lu\n"
+		   "Calibration:\t%lu loops\n",
+		   cpu, mmu, fpu,
+		   clockfreq/1000000,(clockfreq/100000)%10,
+		   loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
+		   loops_per_jiffy);
+	return 0;
+}
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+	return *pos < 1 ? (void *)1 : NULL;
+}
+static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+{
+	++*pos;
+	return NULL;
+}
+static void c_stop(struct seq_file *m, void *v)
+{
+}
+const struct seq_operations cpuinfo_op = {
+	.start	= c_start,
+	.next	= c_next,
+	.stop	= c_stop,
+	.show	= show_cpuinfo,
+};
+
+#ifdef CONFIG_PROC_HARDWARE
+static int hardware_proc_show(struct seq_file *m, void *v)
+{
+	char model[80];
+	unsigned long mem;
+	int i;
+
+	if (mach_get_model)
+		mach_get_model(model);
+	else
+		strcpy(model, "Unknown m68k");
+
+	seq_printf(m, "Model:\t\t%s\n", model);
+	for (mem = 0, i = 0; i < m68k_num_memory; i++)
+		mem += m68k_memory[i].size;
+	seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
+
+	if (mach_get_hardware_list)
+		mach_get_hardware_list(m);
+
+	return 0;
+}
+
+static int hardware_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, hardware_proc_show, NULL);
+}
+
+static const struct file_operations hardware_proc_fops = {
+	.open		= hardware_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static int __init proc_hardware_init(void)
+{
+	proc_create("hardware", 0, NULL, &hardware_proc_fops);
+	return 0;
+}
+module_init(proc_hardware_init);
+#endif
+
+void check_bugs(void)
+{
+#ifndef CONFIG_M68KFPU_EMU
+	if (m68k_fputype == 0) {
+		printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
+			"WHICH IS REQUIRED BY LINUX/M68K ***\n");
+		printk(KERN_EMERG "Upgrade your hardware or join the FPU "
+			"emulation project\n");
+		panic("no FPU");
+	}
+#endif /* !CONFIG_M68KFPU_EMU */
+}
+
+#ifdef CONFIG_ADB
+static int __init adb_probe_sync_enable (char *str) {
+	extern int __adb_probe_sync;
+	__adb_probe_sync = 1;
+	return 1;
+}
+
+__setup("adb_sync", adb_probe_sync_enable);
+#endif /* CONFIG_ADB */