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-rw-r--r--arch/m68k/kernel/setup.c545
1 files changed, 545 insertions, 0 deletions
diff --git a/arch/m68k/kernel/setup.c b/arch/m68k/kernel/setup.c
new file mode 100644
index 00000000000..d6ca99242e5
--- /dev/null
+++ b/arch/m68k/kernel/setup.c
@@ -0,0 +1,545 @@
+/*
+ * linux/arch/m68k/kernel/setup.c
+ *
+ * Copyright (C) 1995 Hamish Macdonald
+ */
+
+/*
+ * This file handles the architecture-dependent parts of system setup
+ */
+
+#include <linux/config.h>
+#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/seq_file.h>
+#include <linux/module.h>
+#include <linux/initrd.h>
+
+#include <asm/bootinfo.h>
+#include <asm/setup.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
+
+unsigned long m68k_machtype;
+unsigned long m68k_cputype;
+unsigned long m68k_fputype;
+unsigned long m68k_mmutype;
+#ifdef CONFIG_VME
+unsigned long vme_brdtype;
+#endif
+
+int m68k_is040or060;
+
+extern int end;
+extern unsigned long availmem;
+
+int m68k_num_memory;
+int m68k_realnum_memory;
+unsigned long m68k_memoffset;
+struct mem_info m68k_memory[NUM_MEMINFO];
+
+static struct mem_info m68k_ramdisk;
+
+static char m68k_command_line[CL_SIZE];
+
+char m68k_debug_device[6] = "";
+
+void (*mach_sched_init) (irqreturn_t (*handler)(int, void *, struct pt_regs *)) __initdata = NULL;
+/* machine dependent irq functions */
+void (*mach_init_IRQ) (void) __initdata = NULL;
+irqreturn_t (*(*mach_default_handler)[]) (int, void *, struct pt_regs *);
+void (*mach_get_model) (char *model);
+int (*mach_get_hardware_list) (char *buffer);
+int (*mach_get_irq_list) (struct seq_file *, void *);
+irqreturn_t (*mach_process_int) (int, struct pt_regs *);
+/* machine dependent timer functions */
+unsigned long (*mach_gettimeoffset) (void);
+int (*mach_hwclk) (int, struct rtc_time*);
+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 *);
+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 */
+#if defined(CONFIG_AMIGA_FLOPPY) || defined(CONFIG_ATARI_FLOPPY)
+void (*mach_floppy_setup) (char *, int *) __initdata = NULL;
+#endif
+#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);
+#endif
+#if defined(CONFIG_ISA) && defined(MULTI_ISA)
+int isa_type;
+int 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 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);
+
+extern void mac_debugging_short (int, short);
+extern void mac_debugging_long (int, long);
+
+#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
+ 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;
+ }
+ m68k_memoffset = m68k_memory[0].addr-PAGE_OFFSET;
+#endif
+}
+
+void __init setup_arch(char **cmdline_p)
+{
+ extern int _etext, _edata, _end;
+#ifndef CONFIG_SUN3
+ unsigned long endmem, startmem;
+#endif
+ int i;
+ char *p, *q;
+
+ /* 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(saved_command_line, *cmdline_p, CL_SIZE);
+
+ /* Parse the command line for arch-specific options.
+ * For the m68k, this is currently only "debug=xxx" to enable printing
+ * certain kernel messages to some machine-specific device.
+ */
+ for( p = *cmdline_p; p && *p; ) {
+ i = 0;
+ if (!strncmp( p, "debug=", 6 )) {
+ strlcpy( m68k_debug_device, p+6, sizeof(m68k_debug_device) );
+ if ((q = strchr( m68k_debug_device, ' ' ))) *q = 0;
+ i = 1;
+ }
+#ifdef CONFIG_ATARI
+ /* This option must be parsed very early */
+ if (!strncmp( p, "switches=", 9 )) {
+ extern void atari_switches_setup( const char *, int );
+ atari_switches_setup( p+9, (q = strchr( p+9, ' ' )) ?
+ (q - (p+9)) : strlen(p+9) );
+ i = 1;
+ }
+#endif
+
+ if (i) {
+ /* option processed, delete it */
+ if ((q = strchr( p, ' ' )))
+ strcpy( p, q+1 );
+ else
+ *p = 0;
+ } else {
+ if ((p = strchr( p, ' ' ))) ++p;
+ }
+ }
+
+ 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");
+ }
+
+#ifndef CONFIG_SUN3
+ startmem= m68k_memory[0].addr;
+ endmem = startmem + m68k_memory[0].size;
+ high_memory = (void *)PAGE_OFFSET;
+ for (i = 0; i < m68k_num_memory; i++) {
+ m68k_memory[i].size &= MASK_256K;
+ if (m68k_memory[i].addr < startmem)
+ startmem = m68k_memory[i].addr;
+ if (m68k_memory[i].addr+m68k_memory[i].size > endmem)
+ endmem = m68k_memory[i].addr+m68k_memory[i].size;
+ high_memory += m68k_memory[i].size;
+ }
+
+ availmem += init_bootmem_node(NODE_DATA(0), availmem >> PAGE_SHIFT,
+ startmem >> PAGE_SHIFT, endmem >> PAGE_SHIFT);
+
+ for (i = 0; i < m68k_num_memory; i++)
+ free_bootmem(m68k_memory[i].addr, m68k_memory[i].size);
+
+ reserve_bootmem(m68k_memory[0].addr, availmem - m68k_memory[0].addr);
+
+#ifdef CONFIG_BLK_DEV_INITRD
+ if (m68k_ramdisk.size) {
+ reserve_bootmem(m68k_ramdisk.addr, m68k_ramdisk.size);
+ 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 */
+
+ paging_init();
+
+/* set ISA defs early as possible */
+#if defined(CONFIG_ISA) && defined(MULTI_ISA)
+#if defined(CONFIG_Q40)
+ if (MACH_IS_Q40) {
+ isa_type = Q40_ISA;
+ isa_sex = 0;
+ }
+#elif defined(CONFIG_GG2)
+ if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)){
+ isa_type = GG2_ISA;
+ isa_sex = 0;
+ }
+#elif defined(CONFIG_AMIGA_PCMCIA)
+ if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)){
+ isa_type = AG_ISA;
+ 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)
+{
+}
+struct seq_operations cpuinfo_op = {
+ .start = c_start,
+ .next = c_next,
+ .stop = c_stop,
+ .show = show_cpuinfo,
+};
+
+int get_hardware_list(char *buffer)
+{
+ int len = 0;
+ char model[80];
+ unsigned long mem;
+ int i;
+
+ if (mach_get_model)
+ mach_get_model(model);
+ else
+ strcpy(model, "Unknown m68k");
+
+ len += sprintf(buffer+len, "Model:\t\t%s\n", model);
+ for (mem = 0, i = 0; i < m68k_num_memory; i++)
+ mem += m68k_memory[i].size;
+ len += sprintf(buffer+len, "System Memory:\t%ldK\n", mem>>10);
+
+ if (mach_get_hardware_list)
+ len += mach_get_hardware_list(buffer+len);
+
+ return(len);
+}
+
+
+#if defined(CONFIG_AMIGA_FLOPPY) || defined(CONFIG_ATARI_FLOPPY)
+void __init floppy_setup(char *str, int *ints)
+{
+ if (mach_floppy_setup)
+ mach_floppy_setup (str, ints);
+}
+
+#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 */
+}
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