Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 607 insertions, 0 deletions

diff --git a/arch/m68k/kernel/setup_mm.c b/arch/m68k/kernel/setup_mm.c
new file mode 100644
index 000000000..6f1ae01f3
--- /dev/null
+++ b/arch/m68k/kernel/setup_mm.c
@@ -0,0 +1,607 @@
+// 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/cpu.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/errno.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/memblock.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/module.h>
+#include <linux/nvram.h>
+#include <linux/initrd.h>
+#include <linux/random.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
+#include <asm/atarihw.h>
+#ifdef CONFIG_ATARI
+#include <asm/atari_stram.h>
+#endif
+#ifdef CONFIG_SUN3X
+#include <asm/dvma.h>
+#endif
+#include <asm/macintosh.h>
+#include <asm/natfeat.h>
+#include <asm/config.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) (void) __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);
+void (*mach_reset)( void );
+void (*mach_halt)( void );
+#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
+
+#define MASK_256K 0xfffc0000
+
+extern void paging_init(void);
+
+static void __init m68k_parse_bootinfo(const struct bi_record *record)
+{
+	const struct bi_record *first_record = record;
+	uint16_t tag;
+
+	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);
+				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:
+			strscpy(m68k_command_line, data,
+				sizeof(m68k_command_line));
+			break;
+
+		case BI_RNG_SEED: {
+			u16 len = be16_to_cpup(data);
+			add_bootloader_randomness(data + 2, len);
+			/*
+			 * Zero the data to preserve forward secrecy, and zero the
+			 * length to prevent kexec from using it.
+			 */
+			memzero_explicit((void *)data, len + 2);
+			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 if (MACH_IS_VIRT)
+				unknown = virt_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);
+	}
+
+	save_bootinfo(first_record);
+
+	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));
+		}
+	}
+
+	setup_initial_init_mm((void *)PAGE_OFFSET, _etext, _edata, _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();
+
+	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
+#ifdef CONFIG_VIRT
+	case MACH_VIRT:
+		config_virt();
+		break;
+#endif
+	default:
+		panic("No configuration setup");
+	}
+
+	if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) && m68k_ramdisk.size)
+		memblock_reserve(m68k_ramdisk.addr, m68k_ramdisk.size);
+
+	paging_init();
+
+	if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) && 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);
+	}
+
+#ifdef CONFIG_NATFEAT
+	nf_init();
+#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
+
+/* 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 __init arch_cpu_finalize_init(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 */
+
+#if IS_ENABLED(CONFIG_NVRAM)
+#ifdef CONFIG_MAC
+static unsigned char m68k_nvram_read_byte(int addr)
+{
+	if (MACH_IS_MAC)
+		return mac_pram_read_byte(addr);
+	return 0xff;
+}
+
+static void m68k_nvram_write_byte(unsigned char val, int addr)
+{
+	if (MACH_IS_MAC)
+		mac_pram_write_byte(val, addr);
+}
+#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 */