| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * 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/memblock.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/byteorder.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 m68k_mem_info m68k_memory[NUM_MEMINFO]; |
| EXPORT_SYMBOL(m68k_memory); |
| |
| static struct m68k_mem_info m68k_ramdisk __initdata; |
| |
| static char m68k_command_line[CL_SIZE] __initdata; |
| |
| 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 */ |
| int (*mach_hwclk) (int, struct rtc_time*); |
| EXPORT_SYMBOL(mach_hwclk); |
| 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_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) |
| { |
| uint16_t tag; |
| |
| save_bootinfo(record); |
| |
| while ((tag = be16_to_cpu(record->tag)) != BI_LAST) { |
| int unknown = 0; |
| const void *data = record->data; |
| uint16_t size = be16_to_cpu(record->size); |
| |
| switch (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) { |
| const struct mem_info *m = data; |
| m68k_memory[m68k_num_memory].addr = |
| be32_to_cpu(m->addr); |
| m68k_memory[m68k_num_memory].size = |
| be32_to_cpu(m->size); |
| memblock_add(m68k_memory[m68k_num_memory].addr, |
| m68k_memory[m68k_num_memory].size); |
| m68k_num_memory++; |
| } else |
| pr_warn("%s: too many memory chunks\n", |
| __func__); |
| break; |
| |
| case BI_RAMDISK: |
| { |
| const struct mem_info *m = data; |
| m68k_ramdisk.addr = be32_to_cpu(m->addr); |
| m68k_ramdisk.size = be32_to_cpu(m->size); |
| } |
| break; |
| |
| case BI_COMMAND_LINE: |
| strlcpy(m68k_command_line, 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) |
| pr_warn("%s: unknown tag 0x%04x ignored\n", __func__, |
| tag); |
| record = (struct bi_record *)((unsigned long)record + size); |
| } |
| |
| m68k_realnum_memory = m68k_num_memory; |
| #ifdef CONFIG_SINGLE_MEMORY_CHUNK |
| if (m68k_num_memory > 1) { |
| pr_warn("%s: ignoring last %i chunks of physical memory\n", |
| __func__, (m68k_num_memory - 1)); |
| m68k_num_memory = 1; |
| } |
| #endif |
| } |
| |
| void __init setup_arch(char **cmdline_p) |
| { |
| /* The bootinfo is located right after the kernel */ |
| if (!CPU_IS_COLDFIRE) |
| 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] */ |
| #if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU_ONLY) |
| /* clear the fpu if we have one */ |
| if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) { |
| 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) { |
| pr_warn("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; |
| |
| #if defined(CONFIG_BOOTPARAM) |
| strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE); |
| m68k_command_line[CL_SIZE - 1] = 0; |
| #endif /* CONFIG_BOOTPARAM */ |
| process_uboot_commandline(&m68k_command_line[0], CL_SIZE); |
| *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 |
| #ifdef CONFIG_COLDFIRE |
| case MACH_M54XX: |
| case MACH_M5441X: |
| cf_bootmem_alloc(); |
| cf_mmu_context_init(); |
| config_BSP(NULL, 0); |
| break; |
| #endif |
| default: |
| panic("No configuration setup"); |
| } |
| |
| paging_init(); |
| |
| #ifdef CONFIG_NATFEAT |
| nf_init(); |
| #endif |
| |
| #ifndef CONFIG_SUN3 |
| #ifdef CONFIG_BLK_DEV_INITRD |
| if (m68k_ramdisk.size) { |
| memblock_reserve(m68k_ramdisk.addr, m68k_ramdisk.size); |
| initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr); |
| initrd_end = initrd_start + m68k_ramdisk.size; |
| pr_info("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 |
| #ifdef CONFIG_ATARI_ROM_ISA |
| if (MACH_IS_ATARI) { |
| isa_type = ISA_TYPE_ENEC; |
| isa_sex = 0; |
| } |
| #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) |
| #define LOOP_CYCLES_COLDFIRE (2) |
| |
| 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 if (CPU_IS_COLDFIRE) { |
| cpu = "ColdFire"; |
| clockfactor = LOOP_CYCLES_COLDFIRE; |
| } 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 if (m68k_fputype & FPU_COLDFIRE) |
| fpu = "ColdFire"; |
| 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 if (m68k_mmutype & MMU_COLDFIRE) |
| mmu = "ColdFire"; |
| 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 __init proc_hardware_init(void) |
| { |
| proc_create_single("hardware", 0, NULL, hardware_proc_show); |
| return 0; |
| } |
| module_init(proc_hardware_init); |
| #endif |
| |
| void check_bugs(void) |
| { |
| #if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU) |
| if (m68k_fputype == 0) { |
| pr_emerg("*** YOU DO NOT HAVE A FLOATING POINT UNIT, " |
| "WHICH IS REQUIRED BY LINUX/M68K ***\n"); |
| pr_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 */ |