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624 lines
14 KiB
624 lines
14 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* linux/arch/m68k/kernel/setup.c |
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* |
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* Copyright (C) 1995 Hamish Macdonald |
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*/ |
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|
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/* |
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* This file handles the architecture-dependent parts of system setup |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/mm.h> |
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#include <linux/sched.h> |
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#include <linux/delay.h> |
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#include <linux/interrupt.h> |
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#include <linux/fs.h> |
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#include <linux/console.h> |
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#include <linux/genhd.h> |
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#include <linux/errno.h> |
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#include <linux/string.h> |
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#include <linux/init.h> |
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#include <linux/memblock.h> |
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#include <linux/proc_fs.h> |
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#include <linux/seq_file.h> |
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#include <linux/module.h> |
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#include <linux/nvram.h> |
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#include <linux/initrd.h> |
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#include <asm/bootinfo.h> |
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#include <asm/byteorder.h> |
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#include <asm/sections.h> |
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#include <asm/setup.h> |
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#include <asm/fpu.h> |
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#include <asm/irq.h> |
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#include <asm/io.h> |
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#include <asm/machdep.h> |
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#ifdef CONFIG_AMIGA |
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#include <asm/amigahw.h> |
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#endif |
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#include <asm/atarihw.h> |
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#ifdef CONFIG_ATARI |
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#include <asm/atari_stram.h> |
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#endif |
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#ifdef CONFIG_SUN3X |
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#include <asm/dvma.h> |
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#endif |
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#include <asm/macintosh.h> |
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#include <asm/natfeat.h> |
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#if !FPSTATESIZE || !NR_IRQS |
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#warning No CPU/platform type selected, your kernel will not work! |
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#warning Are you building an allnoconfig kernel? |
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#endif |
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unsigned long m68k_machtype; |
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EXPORT_SYMBOL(m68k_machtype); |
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unsigned long m68k_cputype; |
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EXPORT_SYMBOL(m68k_cputype); |
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unsigned long m68k_fputype; |
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unsigned long m68k_mmutype; |
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EXPORT_SYMBOL(m68k_mmutype); |
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#ifdef CONFIG_VME |
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unsigned long vme_brdtype; |
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EXPORT_SYMBOL(vme_brdtype); |
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#endif |
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int m68k_is040or060; |
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EXPORT_SYMBOL(m68k_is040or060); |
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extern unsigned long availmem; |
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int m68k_num_memory; |
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EXPORT_SYMBOL(m68k_num_memory); |
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int m68k_realnum_memory; |
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EXPORT_SYMBOL(m68k_realnum_memory); |
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unsigned long m68k_memoffset; |
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struct m68k_mem_info m68k_memory[NUM_MEMINFO]; |
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EXPORT_SYMBOL(m68k_memory); |
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static struct m68k_mem_info m68k_ramdisk __initdata; |
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static char m68k_command_line[CL_SIZE] __initdata; |
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void (*mach_sched_init) (void) __initdata = NULL; |
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/* machine dependent irq functions */ |
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void (*mach_init_IRQ) (void) __initdata = NULL; |
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void (*mach_get_model) (char *model); |
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void (*mach_get_hardware_list) (struct seq_file *m); |
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/* machine dependent timer functions */ |
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int (*mach_hwclk) (int, struct rtc_time*); |
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EXPORT_SYMBOL(mach_hwclk); |
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unsigned int (*mach_get_ss)(void); |
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int (*mach_get_rtc_pll)(struct rtc_pll_info *); |
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int (*mach_set_rtc_pll)(struct rtc_pll_info *); |
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EXPORT_SYMBOL(mach_get_ss); |
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EXPORT_SYMBOL(mach_get_rtc_pll); |
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EXPORT_SYMBOL(mach_set_rtc_pll); |
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void (*mach_reset)( void ); |
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void (*mach_halt)( void ); |
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void (*mach_power_off)( void ); |
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#ifdef CONFIG_HEARTBEAT |
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void (*mach_heartbeat) (int); |
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EXPORT_SYMBOL(mach_heartbeat); |
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#endif |
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#ifdef CONFIG_M68K_L2_CACHE |
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void (*mach_l2_flush) (int); |
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#endif |
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#if defined(CONFIG_ISA) && defined(MULTI_ISA) |
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int isa_type; |
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int isa_sex; |
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EXPORT_SYMBOL(isa_type); |
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EXPORT_SYMBOL(isa_sex); |
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#endif |
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extern int amiga_parse_bootinfo(const struct bi_record *); |
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extern int atari_parse_bootinfo(const struct bi_record *); |
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extern int mac_parse_bootinfo(const struct bi_record *); |
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extern int q40_parse_bootinfo(const struct bi_record *); |
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extern int bvme6000_parse_bootinfo(const struct bi_record *); |
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extern int mvme16x_parse_bootinfo(const struct bi_record *); |
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extern int mvme147_parse_bootinfo(const struct bi_record *); |
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extern int hp300_parse_bootinfo(const struct bi_record *); |
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extern int apollo_parse_bootinfo(const struct bi_record *); |
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extern void config_amiga(void); |
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extern void config_atari(void); |
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extern void config_mac(void); |
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extern void config_sun3(void); |
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extern void config_apollo(void); |
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extern void config_mvme147(void); |
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extern void config_mvme16x(void); |
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extern void config_bvme6000(void); |
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extern void config_hp300(void); |
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extern void config_q40(void); |
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extern void config_sun3x(void); |
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#define MASK_256K 0xfffc0000 |
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extern void paging_init(void); |
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static void __init m68k_parse_bootinfo(const struct bi_record *record) |
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{ |
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uint16_t tag; |
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save_bootinfo(record); |
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while ((tag = be16_to_cpu(record->tag)) != BI_LAST) { |
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int unknown = 0; |
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const void *data = record->data; |
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uint16_t size = be16_to_cpu(record->size); |
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switch (tag) { |
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case BI_MACHTYPE: |
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case BI_CPUTYPE: |
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case BI_FPUTYPE: |
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case BI_MMUTYPE: |
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/* Already set up by head.S */ |
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break; |
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case BI_MEMCHUNK: |
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if (m68k_num_memory < NUM_MEMINFO) { |
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const struct mem_info *m = data; |
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m68k_memory[m68k_num_memory].addr = |
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be32_to_cpu(m->addr); |
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m68k_memory[m68k_num_memory].size = |
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be32_to_cpu(m->size); |
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m68k_num_memory++; |
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} else |
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pr_warn("%s: too many memory chunks\n", |
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__func__); |
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break; |
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case BI_RAMDISK: |
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{ |
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const struct mem_info *m = data; |
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m68k_ramdisk.addr = be32_to_cpu(m->addr); |
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m68k_ramdisk.size = be32_to_cpu(m->size); |
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} |
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break; |
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case BI_COMMAND_LINE: |
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strlcpy(m68k_command_line, data, |
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sizeof(m68k_command_line)); |
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break; |
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default: |
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if (MACH_IS_AMIGA) |
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unknown = amiga_parse_bootinfo(record); |
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else if (MACH_IS_ATARI) |
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unknown = atari_parse_bootinfo(record); |
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else if (MACH_IS_MAC) |
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unknown = mac_parse_bootinfo(record); |
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else if (MACH_IS_Q40) |
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unknown = q40_parse_bootinfo(record); |
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else if (MACH_IS_BVME6000) |
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unknown = bvme6000_parse_bootinfo(record); |
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else if (MACH_IS_MVME16x) |
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unknown = mvme16x_parse_bootinfo(record); |
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else if (MACH_IS_MVME147) |
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unknown = mvme147_parse_bootinfo(record); |
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else if (MACH_IS_HP300) |
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unknown = hp300_parse_bootinfo(record); |
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else if (MACH_IS_APOLLO) |
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unknown = apollo_parse_bootinfo(record); |
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else |
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unknown = 1; |
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} |
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if (unknown) |
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pr_warn("%s: unknown tag 0x%04x ignored\n", __func__, |
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tag); |
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record = (struct bi_record *)((unsigned long)record + size); |
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} |
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m68k_realnum_memory = m68k_num_memory; |
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#ifdef CONFIG_SINGLE_MEMORY_CHUNK |
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if (m68k_num_memory > 1) { |
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pr_warn("%s: ignoring last %i chunks of physical memory\n", |
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__func__, (m68k_num_memory - 1)); |
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m68k_num_memory = 1; |
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} |
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#endif |
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} |
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void __init setup_arch(char **cmdline_p) |
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{ |
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/* The bootinfo is located right after the kernel */ |
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if (!CPU_IS_COLDFIRE) |
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m68k_parse_bootinfo((const struct bi_record *)_end); |
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if (CPU_IS_040) |
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m68k_is040or060 = 4; |
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else if (CPU_IS_060) |
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m68k_is040or060 = 6; |
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/* FIXME: m68k_fputype is passed in by Penguin booter, which can |
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* be confused by software FPU emulation. BEWARE. |
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* We should really do our own FPU check at startup. |
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* [what do we do with buggy 68LC040s? if we have problems |
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* with them, we should add a test to check_bugs() below] */ |
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#if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU_ONLY) |
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/* clear the fpu if we have one */ |
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if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) { |
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volatile int zero = 0; |
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asm volatile ("frestore %0" : : "m" (zero)); |
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} |
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#endif |
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if (CPU_IS_060) { |
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u32 pcr; |
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asm (".chip 68060; movec %%pcr,%0; .chip 68k" |
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: "=d" (pcr)); |
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if (((pcr >> 8) & 0xff) <= 5) { |
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pr_warn("Enabling workaround for errata I14\n"); |
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asm (".chip 68060; movec %0,%%pcr; .chip 68k" |
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: : "d" (pcr | 0x20)); |
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} |
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} |
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init_mm.start_code = PAGE_OFFSET; |
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init_mm.end_code = (unsigned long)_etext; |
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init_mm.end_data = (unsigned long)_edata; |
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init_mm.brk = (unsigned long)_end; |
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#if defined(CONFIG_BOOTPARAM) |
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strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE); |
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m68k_command_line[CL_SIZE - 1] = 0; |
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#endif /* CONFIG_BOOTPARAM */ |
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process_uboot_commandline(&m68k_command_line[0], CL_SIZE); |
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*cmdline_p = m68k_command_line; |
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memcpy(boot_command_line, *cmdline_p, CL_SIZE); |
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parse_early_param(); |
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switch (m68k_machtype) { |
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#ifdef CONFIG_AMIGA |
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case MACH_AMIGA: |
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config_amiga(); |
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break; |
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#endif |
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#ifdef CONFIG_ATARI |
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case MACH_ATARI: |
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config_atari(); |
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break; |
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#endif |
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#ifdef CONFIG_MAC |
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case MACH_MAC: |
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config_mac(); |
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break; |
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#endif |
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#ifdef CONFIG_SUN3 |
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case MACH_SUN3: |
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config_sun3(); |
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break; |
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#endif |
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#ifdef CONFIG_APOLLO |
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case MACH_APOLLO: |
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config_apollo(); |
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break; |
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#endif |
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#ifdef CONFIG_MVME147 |
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case MACH_MVME147: |
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config_mvme147(); |
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break; |
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#endif |
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#ifdef CONFIG_MVME16x |
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case MACH_MVME16x: |
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config_mvme16x(); |
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break; |
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#endif |
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#ifdef CONFIG_BVME6000 |
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case MACH_BVME6000: |
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config_bvme6000(); |
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break; |
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#endif |
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#ifdef CONFIG_HP300 |
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case MACH_HP300: |
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config_hp300(); |
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break; |
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#endif |
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#ifdef CONFIG_Q40 |
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case MACH_Q40: |
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config_q40(); |
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break; |
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#endif |
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#ifdef CONFIG_SUN3X |
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case MACH_SUN3X: |
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config_sun3x(); |
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break; |
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#endif |
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#ifdef CONFIG_COLDFIRE |
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case MACH_M54XX: |
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case MACH_M5441X: |
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cf_bootmem_alloc(); |
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cf_mmu_context_init(); |
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config_BSP(NULL, 0); |
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break; |
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#endif |
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default: |
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panic("No configuration setup"); |
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} |
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paging_init(); |
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#ifdef CONFIG_NATFEAT |
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nf_init(); |
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#endif |
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#ifndef CONFIG_SUN3 |
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#ifdef CONFIG_BLK_DEV_INITRD |
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if (m68k_ramdisk.size) { |
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memblock_reserve(m68k_ramdisk.addr, m68k_ramdisk.size); |
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initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr); |
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initrd_end = initrd_start + m68k_ramdisk.size; |
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pr_info("initrd: %08lx - %08lx\n", initrd_start, initrd_end); |
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} |
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#endif |
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#ifdef CONFIG_ATARI |
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if (MACH_IS_ATARI) |
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atari_stram_reserve_pages((void *)availmem); |
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#endif |
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#ifdef CONFIG_SUN3X |
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if (MACH_IS_SUN3X) { |
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dvma_init(); |
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} |
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#endif |
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#endif /* !CONFIG_SUN3 */ |
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/* set ISA defs early as possible */ |
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#if defined(CONFIG_ISA) && defined(MULTI_ISA) |
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if (MACH_IS_Q40) { |
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isa_type = ISA_TYPE_Q40; |
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isa_sex = 0; |
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} |
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#ifdef CONFIG_AMIGA_PCMCIA |
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if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) { |
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isa_type = ISA_TYPE_AG; |
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isa_sex = 1; |
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} |
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#endif |
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#ifdef CONFIG_ATARI_ROM_ISA |
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if (MACH_IS_ATARI) { |
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isa_type = ISA_TYPE_ENEC; |
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isa_sex = 0; |
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} |
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#endif |
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#endif |
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} |
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static int show_cpuinfo(struct seq_file *m, void *v) |
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{ |
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const char *cpu, *mmu, *fpu; |
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unsigned long clockfreq, clockfactor; |
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#define LOOP_CYCLES_68020 (8) |
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#define LOOP_CYCLES_68030 (8) |
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#define LOOP_CYCLES_68040 (3) |
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#define LOOP_CYCLES_68060 (1) |
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#define LOOP_CYCLES_COLDFIRE (2) |
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if (CPU_IS_020) { |
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cpu = "68020"; |
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clockfactor = LOOP_CYCLES_68020; |
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} else if (CPU_IS_030) { |
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cpu = "68030"; |
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clockfactor = LOOP_CYCLES_68030; |
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} else if (CPU_IS_040) { |
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cpu = "68040"; |
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clockfactor = LOOP_CYCLES_68040; |
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} else if (CPU_IS_060) { |
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cpu = "68060"; |
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clockfactor = LOOP_CYCLES_68060; |
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} else if (CPU_IS_COLDFIRE) { |
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cpu = "ColdFire"; |
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clockfactor = LOOP_CYCLES_COLDFIRE; |
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} else { |
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cpu = "680x0"; |
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clockfactor = 0; |
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} |
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#ifdef CONFIG_M68KFPU_EMU_ONLY |
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fpu = "none(soft float)"; |
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#else |
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if (m68k_fputype & FPU_68881) |
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fpu = "68881"; |
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else if (m68k_fputype & FPU_68882) |
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fpu = "68882"; |
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else if (m68k_fputype & FPU_68040) |
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fpu = "68040"; |
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else if (m68k_fputype & FPU_68060) |
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fpu = "68060"; |
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else if (m68k_fputype & FPU_SUNFPA) |
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fpu = "Sun FPA"; |
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else if (m68k_fputype & FPU_COLDFIRE) |
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fpu = "ColdFire"; |
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else |
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fpu = "none"; |
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#endif |
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if (m68k_mmutype & MMU_68851) |
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mmu = "68851"; |
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else if (m68k_mmutype & MMU_68030) |
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mmu = "68030"; |
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else if (m68k_mmutype & MMU_68040) |
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mmu = "68040"; |
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else if (m68k_mmutype & MMU_68060) |
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mmu = "68060"; |
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else if (m68k_mmutype & MMU_SUN3) |
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mmu = "Sun-3"; |
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else if (m68k_mmutype & MMU_APOLLO) |
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mmu = "Apollo"; |
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else if (m68k_mmutype & MMU_COLDFIRE) |
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mmu = "ColdFire"; |
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else |
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mmu = "unknown"; |
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clockfreq = loops_per_jiffy * HZ * clockfactor; |
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seq_printf(m, "CPU:\t\t%s\n" |
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"MMU:\t\t%s\n" |
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"FPU:\t\t%s\n" |
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"Clocking:\t%lu.%1luMHz\n" |
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"BogoMips:\t%lu.%02lu\n" |
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"Calibration:\t%lu loops\n", |
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cpu, mmu, fpu, |
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clockfreq/1000000,(clockfreq/100000)%10, |
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loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100, |
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loops_per_jiffy); |
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return 0; |
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} |
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static void *c_start(struct seq_file *m, loff_t *pos) |
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{ |
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return *pos < 1 ? (void *)1 : NULL; |
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} |
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static void *c_next(struct seq_file *m, void *v, loff_t *pos) |
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{ |
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++*pos; |
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return NULL; |
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} |
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static void c_stop(struct seq_file *m, void *v) |
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{ |
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} |
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const struct seq_operations cpuinfo_op = { |
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.start = c_start, |
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.next = c_next, |
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.stop = c_stop, |
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.show = show_cpuinfo, |
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}; |
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#ifdef CONFIG_PROC_HARDWARE |
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static int hardware_proc_show(struct seq_file *m, void *v) |
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{ |
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char model[80]; |
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unsigned long mem; |
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int i; |
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if (mach_get_model) |
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mach_get_model(model); |
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else |
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strcpy(model, "Unknown m68k"); |
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seq_printf(m, "Model:\t\t%s\n", model); |
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for (mem = 0, i = 0; i < m68k_num_memory; i++) |
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mem += m68k_memory[i].size; |
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seq_printf(m, "System Memory:\t%ldK\n", mem >> 10); |
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if (mach_get_hardware_list) |
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mach_get_hardware_list(m); |
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return 0; |
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} |
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static int __init proc_hardware_init(void) |
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{ |
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proc_create_single("hardware", 0, NULL, hardware_proc_show); |
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return 0; |
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} |
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module_init(proc_hardware_init); |
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#endif |
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void check_bugs(void) |
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{ |
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#if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU) |
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if (m68k_fputype == 0) { |
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pr_emerg("*** YOU DO NOT HAVE A FLOATING POINT UNIT, " |
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"WHICH IS REQUIRED BY LINUX/M68K ***\n"); |
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pr_emerg("Upgrade your hardware or join the FPU " |
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"emulation project\n"); |
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panic("no FPU"); |
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} |
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#endif /* !CONFIG_M68KFPU_EMU */ |
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} |
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#ifdef CONFIG_ADB |
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static int __init adb_probe_sync_enable (char *str) { |
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extern int __adb_probe_sync; |
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__adb_probe_sync = 1; |
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return 1; |
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} |
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__setup("adb_sync", adb_probe_sync_enable); |
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#endif /* CONFIG_ADB */ |
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#if IS_ENABLED(CONFIG_NVRAM) |
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#ifdef CONFIG_MAC |
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static unsigned char m68k_nvram_read_byte(int addr) |
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{ |
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if (MACH_IS_MAC) |
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return mac_pram_read_byte(addr); |
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return 0xff; |
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} |
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static void m68k_nvram_write_byte(unsigned char val, int addr) |
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{ |
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if (MACH_IS_MAC) |
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mac_pram_write_byte(val, addr); |
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} |
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#endif /* CONFIG_MAC */ |
|
|
|
#ifdef CONFIG_ATARI |
|
static ssize_t m68k_nvram_read(char *buf, size_t count, loff_t *ppos) |
|
{ |
|
if (MACH_IS_ATARI) |
|
return atari_nvram_read(buf, count, ppos); |
|
else if (MACH_IS_MAC) |
|
return nvram_read_bytes(buf, count, ppos); |
|
return -EINVAL; |
|
} |
|
|
|
static ssize_t m68k_nvram_write(char *buf, size_t count, loff_t *ppos) |
|
{ |
|
if (MACH_IS_ATARI) |
|
return atari_nvram_write(buf, count, ppos); |
|
else if (MACH_IS_MAC) |
|
return nvram_write_bytes(buf, count, ppos); |
|
return -EINVAL; |
|
} |
|
|
|
static long m68k_nvram_set_checksum(void) |
|
{ |
|
if (MACH_IS_ATARI) |
|
return atari_nvram_set_checksum(); |
|
return -EINVAL; |
|
} |
|
|
|
static long m68k_nvram_initialize(void) |
|
{ |
|
if (MACH_IS_ATARI) |
|
return atari_nvram_initialize(); |
|
return -EINVAL; |
|
} |
|
#endif /* CONFIG_ATARI */ |
|
|
|
static ssize_t m68k_nvram_get_size(void) |
|
{ |
|
if (MACH_IS_ATARI) |
|
return atari_nvram_get_size(); |
|
else if (MACH_IS_MAC) |
|
return mac_pram_get_size(); |
|
return -ENODEV; |
|
} |
|
|
|
/* Atari device drivers call .read (to get checksum validation) whereas |
|
* Mac and PowerMac device drivers just use .read_byte. |
|
*/ |
|
const struct nvram_ops arch_nvram_ops = { |
|
#ifdef CONFIG_MAC |
|
.read_byte = m68k_nvram_read_byte, |
|
.write_byte = m68k_nvram_write_byte, |
|
#endif |
|
#ifdef CONFIG_ATARI |
|
.read = m68k_nvram_read, |
|
.write = m68k_nvram_write, |
|
.set_checksum = m68k_nvram_set_checksum, |
|
.initialize = m68k_nvram_initialize, |
|
#endif |
|
.get_size = m68k_nvram_get_size, |
|
}; |
|
EXPORT_SYMBOL(arch_nvram_ops); |
|
#endif /* CONFIG_NVRAM */
|
|
|