Adding upstream version 6.1.76.upstream/6.1.76upstream

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

1 files changed, 411 insertions, 0 deletions

diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
new file mode 100644
index 000000000..cf7c0f72f
--- /dev/null
+++ b/arch/sh/kernel/setup.c
@@ -0,0 +1,411 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * arch/sh/kernel/setup.c
+ *
+ * This file handles the architecture-dependent parts of initialization
+ *
+ *  Copyright (C) 1999  Niibe Yutaka
+ *  Copyright (C) 2002 - 2010 Paul Mundt
+ */
+#include <linux/screen_info.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/initrd.h>
+#include <linux/console.h>
+#include <linux/root_dev.h>
+#include <linux/utsname.h>
+#include <linux/nodemask.h>
+#include <linux/cpu.h>
+#include <linux/pfn.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/kexec.h>
+#include <linux/module.h>
+#include <linux/smp.h>
+#include <linux/err.h>
+#include <linux/crash_dump.h>
+#include <linux/mmzone.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/memblock.h>
+#include <linux/of.h>
+#include <linux/of_fdt.h>
+#include <linux/uaccess.h>
+#include <uapi/linux/mount.h>
+#include <asm/io.h>
+#include <asm/page.h>
+#include <asm/elf.h>
+#include <asm/sections.h>
+#include <asm/irq.h>
+#include <asm/setup.h>
+#include <asm/clock.h>
+#include <asm/smp.h>
+#include <asm/mmu_context.h>
+#include <asm/mmzone.h>
+#include <asm/processor.h>
+#include <asm/sparsemem.h>
+#include <asm/platform_early.h>
+
+/*
+ * Initialize loops_per_jiffy as 10000000 (1000MIPS).
+ * This value will be used at the very early stage of serial setup.
+ * The bigger value means no problem.
+ */
+struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = {
+	[0] = {
+		.type			= CPU_SH_NONE,
+		.family			= CPU_FAMILY_UNKNOWN,
+		.loops_per_jiffy	= 10000000,
+		.phys_bits		= MAX_PHYSMEM_BITS,
+	},
+};
+EXPORT_SYMBOL(cpu_data);
+
+/*
+ * The machine vector. First entry in .machvec.init, or clobbered by
+ * sh_mv= on the command line, prior to .machvec.init teardown.
+ */
+struct sh_machine_vector sh_mv = { .mv_name = "generic", };
+EXPORT_SYMBOL(sh_mv);
+
+#ifdef CONFIG_VT
+struct screen_info screen_info;
+#endif
+
+extern int root_mountflags;
+
+#define RAMDISK_IMAGE_START_MASK	0x07FF
+#define RAMDISK_PROMPT_FLAG		0x8000
+#define RAMDISK_LOAD_FLAG		0x4000
+
+static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, };
+
+static struct resource code_resource = {
+	.name = "Kernel code",
+	.flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
+};
+
+static struct resource data_resource = {
+	.name = "Kernel data",
+	.flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
+};
+
+static struct resource bss_resource = {
+	.name	= "Kernel bss",
+	.flags	= IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
+};
+
+unsigned long memory_start;
+EXPORT_SYMBOL(memory_start);
+unsigned long memory_end = 0;
+EXPORT_SYMBOL(memory_end);
+unsigned long memory_limit = 0;
+
+static struct resource mem_resources[MAX_NUMNODES];
+
+int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
+
+static int __init early_parse_mem(char *p)
+{
+	if (!p)
+		return 1;
+
+	memory_limit = PAGE_ALIGN(memparse(p, &p));
+
+	pr_notice("Memory limited to %ldMB\n", memory_limit >> 20);
+
+	return 0;
+}
+early_param("mem", early_parse_mem);
+
+void __init check_for_initrd(void)
+{
+#ifdef CONFIG_BLK_DEV_INITRD
+	unsigned long start, end;
+
+	/*
+	 * Check for the rare cases where boot loaders adhere to the boot
+	 * ABI.
+	 */
+	if (!LOADER_TYPE || !INITRD_START || !INITRD_SIZE)
+		goto disable;
+
+	start = INITRD_START + __MEMORY_START;
+	end = start + INITRD_SIZE;
+
+	if (unlikely(end <= start))
+		goto disable;
+	if (unlikely(start & ~PAGE_MASK)) {
+		pr_err("initrd must be page aligned\n");
+		goto disable;
+	}
+
+	if (unlikely(start < __MEMORY_START)) {
+		pr_err("initrd start (%08lx) < __MEMORY_START(%x)\n",
+			start, __MEMORY_START);
+		goto disable;
+	}
+
+	if (unlikely(end > memblock_end_of_DRAM())) {
+		pr_err("initrd extends beyond end of memory "
+		       "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
+		       end, (unsigned long)memblock_end_of_DRAM());
+		goto disable;
+	}
+
+	/*
+	 * If we got this far in spite of the boot loader's best efforts
+	 * to the contrary, assume we actually have a valid initrd and
+	 * fix up the root dev.
+	 */
+	ROOT_DEV = Root_RAM0;
+
+	/*
+	 * Address sanitization
+	 */
+	initrd_start = (unsigned long)__va(start);
+	initrd_end = initrd_start + INITRD_SIZE;
+
+	memblock_reserve(__pa(initrd_start), INITRD_SIZE);
+
+	return;
+
+disable:
+	pr_info("initrd disabled\n");
+	initrd_start = initrd_end = 0;
+#endif
+}
+
+#ifndef CONFIG_GENERIC_CALIBRATE_DELAY
+void calibrate_delay(void)
+{
+	struct clk *clk = clk_get(NULL, "cpu_clk");
+
+	if (IS_ERR(clk))
+		panic("Need a sane CPU clock definition!");
+
+	loops_per_jiffy = (clk_get_rate(clk) >> 1) / HZ;
+
+	printk(KERN_INFO "Calibrating delay loop (skipped)... "
+			 "%lu.%02lu BogoMIPS PRESET (lpj=%lu)\n",
+			 loops_per_jiffy/(500000/HZ),
+			 (loops_per_jiffy/(5000/HZ)) % 100,
+			 loops_per_jiffy);
+}
+#endif
+
+void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
+						unsigned long end_pfn)
+{
+	struct resource *res = &mem_resources[nid];
+	unsigned long start, end;
+
+	WARN_ON(res->name); /* max one active range per node for now */
+
+	start = start_pfn << PAGE_SHIFT;
+	end = end_pfn << PAGE_SHIFT;
+
+	res->name = "System RAM";
+	res->start = start;
+	res->end = end - 1;
+	res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
+
+	if (request_resource(&iomem_resource, res)) {
+		pr_err("unable to request memory_resource 0x%lx 0x%lx\n",
+		       start_pfn, end_pfn);
+		return;
+	}
+
+	/*
+	 * We don't know which RAM region contains kernel data or
+	 * the reserved crashkernel region, so try it repeatedly
+	 * and let the resource manager test it.
+	 */
+	request_resource(res, &code_resource);
+	request_resource(res, &data_resource);
+	request_resource(res, &bss_resource);
+#ifdef CONFIG_KEXEC
+	request_resource(res, &crashk_res);
+#endif
+
+	/*
+	 * Also make sure that there is a PMB mapping that covers this
+	 * range before we attempt to activate it, to avoid reset by MMU.
+	 * We can hit this path with NUMA or memory hot-add.
+	 */
+	pmb_bolt_mapping((unsigned long)__va(start), start, end - start,
+			 PAGE_KERNEL);
+
+	memblock_set_node(PFN_PHYS(start_pfn), PFN_PHYS(end_pfn - start_pfn),
+			  &memblock.memory, nid);
+}
+
+void __init __weak plat_early_device_setup(void)
+{
+}
+
+#ifdef CONFIG_OF_EARLY_FLATTREE
+void __ref sh_fdt_init(phys_addr_t dt_phys)
+{
+	static int done = 0;
+	void *dt_virt;
+
+	/* Avoid calling an __init function on secondary cpus. */
+	if (done) return;
+
+#ifdef CONFIG_USE_BUILTIN_DTB
+	dt_virt = __dtb_start;
+#else
+	dt_virt = phys_to_virt(dt_phys);
+#endif
+
+	if (!dt_virt || !early_init_dt_scan(dt_virt)) {
+		pr_crit("Error: invalid device tree blob"
+			" at physical address %p\n", (void *)dt_phys);
+
+		while (true)
+			cpu_relax();
+	}
+
+	done = 1;
+}
+#endif
+
+void __init setup_arch(char **cmdline_p)
+{
+	enable_mmu();
+
+	ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
+
+	printk(KERN_NOTICE "Boot params:\n"
+			   "... MOUNT_ROOT_RDONLY - %08lx\n"
+			   "... RAMDISK_FLAGS     - %08lx\n"
+			   "... ORIG_ROOT_DEV     - %08lx\n"
+			   "... LOADER_TYPE       - %08lx\n"
+			   "... INITRD_START      - %08lx\n"
+			   "... INITRD_SIZE       - %08lx\n",
+			   MOUNT_ROOT_RDONLY, RAMDISK_FLAGS,
+			   ORIG_ROOT_DEV, LOADER_TYPE,
+			   INITRD_START, INITRD_SIZE);
+
+#ifdef CONFIG_BLK_DEV_RAM
+	rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
+#endif
+
+	if (!MOUNT_ROOT_RDONLY)
+		root_mountflags &= ~MS_RDONLY;
+	setup_initial_init_mm(_text, _etext, _edata, _end);
+
+	code_resource.start = virt_to_phys(_text);
+	code_resource.end = virt_to_phys(_etext)-1;
+	data_resource.start = virt_to_phys(_etext);
+	data_resource.end = virt_to_phys(_edata)-1;
+	bss_resource.start = virt_to_phys(__bss_start);
+	bss_resource.end = virt_to_phys(__bss_stop)-1;
+
+#ifdef CONFIG_CMDLINE_OVERWRITE
+	strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line));
+#else
+	strlcpy(command_line, COMMAND_LINE, sizeof(command_line));
+#ifdef CONFIG_CMDLINE_EXTEND
+	strlcat(command_line, " ", sizeof(command_line));
+	strlcat(command_line, CONFIG_CMDLINE, sizeof(command_line));
+#endif
+#endif
+
+	/* Save unparsed command line copy for /proc/cmdline */
+	memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
+	*cmdline_p = command_line;
+
+	parse_early_param();
+
+	plat_early_device_setup();
+
+	sh_mv_setup();
+
+	/* Let earlyprintk output early console messages */
+	sh_early_platform_driver_probe("earlyprintk", 1, 1);
+
+#ifdef CONFIG_OF_EARLY_FLATTREE
+#ifdef CONFIG_USE_BUILTIN_DTB
+	unflatten_and_copy_device_tree();
+#else
+	unflatten_device_tree();
+#endif
+#endif
+
+	paging_init();
+
+	/* Perform the machine specific initialisation */
+	if (likely(sh_mv.mv_setup))
+		sh_mv.mv_setup(cmdline_p);
+
+	plat_smp_setup();
+}
+
+/* processor boot mode configuration */
+int generic_mode_pins(void)
+{
+	pr_warn("generic_mode_pins(): missing mode pin configuration\n");
+	return 0;
+}
+
+int test_mode_pin(int pin)
+{
+	return sh_mv.mv_mode_pins() & pin;
+}
+
+void __init arch_cpu_finalize_init(void)
+{
+	char *p = &init_utsname()->machine[2]; /* "sh" */
+
+	select_idle_routine();
+
+	current_cpu_data.loops_per_jiffy = loops_per_jiffy;
+
+	switch (current_cpu_data.family) {
+	case CPU_FAMILY_SH2:
+		*p++ = '2';
+		break;
+	case CPU_FAMILY_SH2A:
+		*p++ = '2';
+		*p++ = 'a';
+		break;
+	case CPU_FAMILY_SH3:
+		*p++ = '3';
+		break;
+	case CPU_FAMILY_SH4:
+		*p++ = '4';
+		break;
+	case CPU_FAMILY_SH4A:
+		*p++ = '4';
+		*p++ = 'a';
+		break;
+	case CPU_FAMILY_SH4AL_DSP:
+		*p++ = '4';
+		*p++ = 'a';
+		*p++ = 'l';
+		*p++ = '-';
+		*p++ = 'd';
+		*p++ = 's';
+		*p++ = 'p';
+		break;
+	case CPU_FAMILY_UNKNOWN:
+		/*
+		 * Specifically use CPU_FAMILY_UNKNOWN rather than
+		 * default:, so we're able to have the compiler whine
+		 * about unhandled enumerations.
+		 */
+		break;
+	}
+
+	pr_info("CPU: %s\n", get_cpu_subtype(&current_cpu_data));
+
+#ifndef __LITTLE_ENDIAN__
+	/* 'eb' means 'Endian Big' */
+	*p++ = 'e';
+	*p++ = 'b';
+#endif
+	*p = '\0';
+}