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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/arch/m68k/kernel/setup_mm.c
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@@ -10,6 +10,7 @@
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  */
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 #include <linux/kernel.h>
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+#include <linux/cpu.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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@@ -20,11 +21,11 @@
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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/bootmem.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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@@ -38,13 +39,14 @@
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 #ifdef CONFIG_AMIGA
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 #include <asm/amigahw.h>
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 #endif
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-#ifdef CONFIG_ATARI
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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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@@ -272,10 +274,6 @@
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 	memcpy(boot_command_line, *cmdline_p, CL_SIZE);
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 	parse_early_param();
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-
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-#ifdef CONFIG_DUMMY_CONSOLE
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-	conswitchp = &dummy_con;
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-#endif
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 	switch (m68k_machtype) {
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 #ifdef CONFIG_AMIGA
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@@ -526,7 +524,7 @@
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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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+void __init arch_cpu_finalize_init(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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@@ -548,3 +546,81 @@
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 __setup("adb_sync", adb_probe_sync_enable);
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 #endif /* CONFIG_ADB */
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+
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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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+
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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 */
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+
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+#ifdef CONFIG_ATARI
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+static ssize_t m68k_nvram_read(char *buf, size_t count, loff_t *ppos)
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+{
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+	if (MACH_IS_ATARI)
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+		return atari_nvram_read(buf, count, ppos);
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+	else if (MACH_IS_MAC)
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+		return nvram_read_bytes(buf, count, ppos);
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+	return -EINVAL;
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+}
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+
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+static ssize_t m68k_nvram_write(char *buf, size_t count, loff_t *ppos)
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+{
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+	if (MACH_IS_ATARI)
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+		return atari_nvram_write(buf, count, ppos);
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+	else if (MACH_IS_MAC)
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+		return nvram_write_bytes(buf, count, ppos);
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+	return -EINVAL;
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+}
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+
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+static long m68k_nvram_set_checksum(void)
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+{
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+	if (MACH_IS_ATARI)
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+		return atari_nvram_set_checksum();
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+	return -EINVAL;
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+}
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+
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+static long m68k_nvram_initialize(void)
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+{
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+	if (MACH_IS_ATARI)
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+		return atari_nvram_initialize();
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+	return -EINVAL;
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+}
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+#endif /* CONFIG_ATARI */
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+
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+static ssize_t m68k_nvram_get_size(void)
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+{
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+	if (MACH_IS_ATARI)
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+		return atari_nvram_get_size();
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+	else if (MACH_IS_MAC)
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+		return mac_pram_get_size();
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+	return -ENODEV;
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+}
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+
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+/* Atari device drivers call .read (to get checksum validation) whereas
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+ * Mac and PowerMac device drivers just use .read_byte.
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+ */
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+const struct nvram_ops arch_nvram_ops = {
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+#ifdef CONFIG_MAC
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+	.read_byte      = m68k_nvram_read_byte,
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+	.write_byte     = m68k_nvram_write_byte,
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+#endif
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+#ifdef CONFIG_ATARI
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+	.read           = m68k_nvram_read,
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+	.write          = m68k_nvram_write,
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+	.set_checksum   = m68k_nvram_set_checksum,
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+	.initialize     = m68k_nvram_initialize,
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+#endif
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+	.get_size       = m68k_nvram_get_size,
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+};
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+EXPORT_SYMBOL(arch_nvram_ops);
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+#endif /* CONFIG_NVRAM */