Adding upstream version 5.10.209.upstream/5.10.209upstream

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

1 files changed, 218 insertions, 0 deletions

diff --git a/arch/h8300/kernel/setup.c b/arch/h8300/kernel/setup.c
new file mode 100644
index 000000000..0281f92ee
--- /dev/null
+++ b/arch/h8300/kernel/setup.c
@@ -0,0 +1,218 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  linux/arch/h8300/kernel/setup.c
+ *
+ *  Copyright (C) 2001-2014 Yoshinori Sato <ysato@users.sourceforge.jp>
+ */
+
+/*
+ * This file handles the architecture-dependent parts of system setup
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/console.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/seq_file.h>
+#include <linux/init.h>
+#include <linux/of.h>
+#include <linux/of_fdt.h>
+#include <linux/of_address.h>
+#include <linux/clk-provider.h>
+#include <linux/memblock.h>
+#include <linux/screen_info.h>
+#include <linux/clocksource.h>
+
+#include <asm/setup.h>
+#include <asm/irq.h>
+#include <asm/sections.h>
+#include <asm/page.h>
+
+#if defined(CONFIG_CPU_H8300H)
+#define CPU "H8/300H"
+#elif defined(CONFIG_CPU_H8S)
+#define CPU "H8S"
+#else
+#define CPU "Unknown"
+#endif
+
+unsigned long memory_start;
+unsigned long memory_end;
+EXPORT_SYMBOL(memory_end);
+static unsigned long freq;
+extern char __dtb_start[];
+
+#ifdef CONFIG_VT
+struct screen_info screen_info;
+#endif
+
+char __initdata command_line[COMMAND_LINE_SIZE];
+
+void sim_console_register(void);
+
+void __init h8300_fdt_init(void *fdt, char *bootargs)
+{
+	if (!fdt)
+		fdt = __dtb_start;
+	else
+		strcpy(command_line, bootargs);
+
+	early_init_dt_scan(fdt);
+	memblock_allow_resize();
+}
+
+static void __init bootmem_init(void)
+{
+	struct memblock_region *region;
+
+	memory_end = memory_start = 0;
+
+	/* Find main memory where is the kernel */
+	memory_start = memblock_start_of_DRAM();
+	memory_end = memblock_end_of_DRAM();
+
+	if (!memory_end)
+		panic("No memory!");
+
+	/* setup bootmem globals (we use no_bootmem, but mm still depends on this) */
+	min_low_pfn = PFN_UP(memory_start);
+	max_low_pfn = PFN_DOWN(memory_end);
+	max_pfn = max_low_pfn;
+
+	memblock_reserve(__pa(_stext), _end - _stext);
+
+	early_init_fdt_reserve_self();
+	early_init_fdt_scan_reserved_mem();
+
+	memblock_dump_all();
+}
+
+void __init setup_arch(char **cmdline_p)
+{
+	unflatten_and_copy_device_tree();
+
+	init_mm.start_code = (unsigned long) _stext;
+	init_mm.end_code = (unsigned long) _etext;
+	init_mm.end_data = (unsigned long) _edata;
+	init_mm.brk = (unsigned long) 0;
+
+	pr_notice("\r\n\nuClinux " CPU "\n");
+	pr_notice("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
+
+	if (*command_line)
+		strcpy(boot_command_line, command_line);
+	*cmdline_p = boot_command_line;
+
+	parse_early_param();
+
+	bootmem_init();
+	/*
+	 * get kmalloc into gear
+	 */
+	paging_init();
+}
+
+/*
+ *	Get CPU information for use by the procfs.
+ */
+
+static int show_cpuinfo(struct seq_file *m, void *v)
+{
+	char *cpu;
+
+	cpu = CPU;
+
+	seq_printf(m,  "CPU:\t\t%s\n"
+		   "Clock:\t\t%lu.%1luMHz\n"
+		   "BogoMips:\t%lu.%02lu\n"
+		   "Calibration:\t%lu loops\n",
+		   cpu,
+		   freq/1000, freq%1000,
+		   (loops_per_jiffy*HZ)/500000,
+		   ((loops_per_jiffy*HZ)/5000)%100,
+		   (loops_per_jiffy*HZ));
+
+	return 0;
+}
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+	return *pos < num_possible_cpus() ?
+		((void *) 0x12345678) : NULL;
+}
+
+static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+{
+	++*pos;
+	return c_start(m, pos);
+}
+
+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,
+};
+
+#if defined(CONFIG_CPU_H8300H)
+#define get_wait(base, addr) ({		\
+	int baddr;			\
+	baddr = ((addr) / 0x200000 * 2);			     \
+	w *= (readw((base) + 2) & (3 << baddr)) + 1;		     \
+	})
+#endif
+#if defined(CONFIG_CPU_H8S)
+#define get_wait(base, addr) ({		\
+	int baddr;			\
+	baddr = ((addr) / 0x200000 * 16);			     \
+	w *= (readl((base) + 2) & (7 << baddr)) + 1;	\
+	})
+#endif
+
+static __init int access_timing(void)
+{
+	struct device_node *bsc;
+	void __iomem *base;
+	unsigned long addr = (unsigned long)&__delay;
+	int bit = 1 << (addr / 0x200000);
+	int w;
+
+	bsc = of_find_compatible_node(NULL, NULL, "renesas,h8300-bsc");
+	base = of_iomap(bsc, 0);
+	w = (readb(base + 0) & bit)?2:1;
+	if (readb(base + 1) & bit)
+		w *= get_wait(base, addr);
+	else
+		w *= 2;
+	return w * 3 / 2;
+}
+
+void __init calibrate_delay(void)
+{
+	struct device_node *cpu;
+	int freq;
+
+	cpu = of_find_compatible_node(NULL, NULL, "renesas,h8300");
+	of_property_read_s32(cpu, "clock-frequency", &freq);
+	loops_per_jiffy = freq / HZ / (access_timing() * 2);
+	pr_cont("%lu.%02lu BogoMIPS (lpj=%lu)\n",
+		loops_per_jiffy / (500000 / HZ),
+		(loops_per_jiffy / (5000 / HZ)) % 100, loops_per_jiffy);
+}
+
+
+void __init time_init(void)
+{
+	of_clk_init(NULL);
+	timer_probe();
+}