v4.19.13 snapshot.
diff --git a/arch/sparc/kernel/setup_32.c b/arch/sparc/kernel/setup_32.c
new file mode 100644
index 0000000..13664c3
--- /dev/null
+++ b/arch/sparc/kernel/setup_32.c
@@ -0,0 +1,424 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/arch/sparc/kernel/setup.c
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 2000 Anton Blanchard (anton@samba.org)
+ */
+
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/stddef.h>
+#include <linux/unistd.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/initrd.h>
+#include <asm/smp.h>
+#include <linux/user.h>
+#include <linux/screen_info.h>
+#include <linux/delay.h>
+#include <linux/fs.h>
+#include <linux/seq_file.h>
+#include <linux/syscalls.h>
+#include <linux/kdev_t.h>
+#include <linux/major.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/console.h>
+#include <linux/spinlock.h>
+#include <linux/root_dev.h>
+#include <linux/cpu.h>
+#include <linux/kdebug.h>
+#include <linux/export.h>
+#include <linux/start_kernel.h>
+
+#include <asm/io.h>
+#include <asm/processor.h>
+#include <asm/oplib.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/traps.h>
+#include <asm/vaddrs.h>
+#include <asm/mbus.h>
+#include <asm/idprom.h>
+#include <asm/cpudata.h>
+#include <asm/setup.h>
+#include <asm/cacheflush.h>
+#include <asm/sections.h>
+
+#include "kernel.h"
+
+struct screen_info screen_info = {
+ 0, 0, /* orig-x, orig-y */
+ 0, /* unused */
+ 0, /* orig-video-page */
+ 0, /* orig-video-mode */
+ 128, /* orig-video-cols */
+ 0,0,0, /* ega_ax, ega_bx, ega_cx */
+ 54, /* orig-video-lines */
+ 0, /* orig-video-isVGA */
+ 16 /* orig-video-points */
+};
+
+/* Typing sync at the prom prompt calls the function pointed to by
+ * romvec->pv_synchook which I set to the following function.
+ * This should sync all filesystems and return, for now it just
+ * prints out pretty messages and returns.
+ */
+
+/* Pretty sick eh? */
+static void prom_sync_me(void)
+{
+ unsigned long prom_tbr, flags;
+
+ /* XXX Badly broken. FIX! - Anton */
+ local_irq_save(flags);
+ __asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr));
+ __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
+ "nop\n\t"
+ "nop\n\t"
+ "nop\n\t" : : "r" (&trapbase));
+
+ prom_printf("PROM SYNC COMMAND...\n");
+ show_free_areas(0, NULL);
+ if (!is_idle_task(current)) {
+ local_irq_enable();
+ ksys_sync();
+ local_irq_disable();
+ }
+ prom_printf("Returning to prom\n");
+
+ __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
+ "nop\n\t"
+ "nop\n\t"
+ "nop\n\t" : : "r" (prom_tbr));
+ local_irq_restore(flags);
+}
+
+static unsigned int boot_flags __initdata = 0;
+#define BOOTME_DEBUG 0x1
+
+/* Exported for mm/init.c:paging_init. */
+unsigned long cmdline_memory_size __initdata = 0;
+
+/* which CPU booted us (0xff = not set) */
+unsigned char boot_cpu_id = 0xff; /* 0xff will make it into DATA section... */
+
+static void
+prom_console_write(struct console *con, const char *s, unsigned int n)
+{
+ prom_write(s, n);
+}
+
+static struct console prom_early_console = {
+ .name = "earlyprom",
+ .write = prom_console_write,
+ .flags = CON_PRINTBUFFER | CON_BOOT,
+ .index = -1,
+};
+
+/*
+ * Process kernel command line switches that are specific to the
+ * SPARC or that require special low-level processing.
+ */
+static void __init process_switch(char c)
+{
+ switch (c) {
+ case 'd':
+ boot_flags |= BOOTME_DEBUG;
+ break;
+ case 's':
+ break;
+ case 'h':
+ prom_printf("boot_flags_init: Halt!\n");
+ prom_halt();
+ break;
+ case 'p':
+ prom_early_console.flags &= ~CON_BOOT;
+ break;
+ default:
+ printk("Unknown boot switch (-%c)\n", c);
+ break;
+ }
+}
+
+static void __init boot_flags_init(char *commands)
+{
+ while (*commands) {
+ /* Move to the start of the next "argument". */
+ while (*commands == ' ')
+ commands++;
+
+ /* Process any command switches, otherwise skip it. */
+ if (*commands == '\0')
+ break;
+ if (*commands == '-') {
+ commands++;
+ while (*commands && *commands != ' ')
+ process_switch(*commands++);
+ continue;
+ }
+ if (!strncmp(commands, "mem=", 4)) {
+ /*
+ * "mem=XXX[kKmM] overrides the PROM-reported
+ * memory size.
+ */
+ cmdline_memory_size = simple_strtoul(commands + 4,
+ &commands, 0);
+ if (*commands == 'K' || *commands == 'k') {
+ cmdline_memory_size <<= 10;
+ commands++;
+ } else if (*commands=='M' || *commands=='m') {
+ cmdline_memory_size <<= 20;
+ commands++;
+ }
+ }
+ while (*commands && *commands != ' ')
+ commands++;
+ }
+}
+
+extern unsigned short root_flags;
+extern unsigned short root_dev;
+extern unsigned short ram_flags;
+#define RAMDISK_IMAGE_START_MASK 0x07FF
+#define RAMDISK_PROMPT_FLAG 0x8000
+#define RAMDISK_LOAD_FLAG 0x4000
+
+extern int root_mountflags;
+
+char reboot_command[COMMAND_LINE_SIZE];
+
+struct cpuid_patch_entry {
+ unsigned int addr;
+ unsigned int sun4d[3];
+ unsigned int leon[3];
+};
+extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end;
+
+static void __init per_cpu_patch(void)
+{
+ struct cpuid_patch_entry *p;
+
+ if (sparc_cpu_model == sun4m) {
+ /* Nothing to do, this is what the unpatched code
+ * targets.
+ */
+ return;
+ }
+
+ p = &__cpuid_patch;
+ while (p < &__cpuid_patch_end) {
+ unsigned long addr = p->addr;
+ unsigned int *insns;
+
+ switch (sparc_cpu_model) {
+ case sun4d:
+ insns = &p->sun4d[0];
+ break;
+
+ case sparc_leon:
+ insns = &p->leon[0];
+ break;
+ default:
+ prom_printf("Unknown cpu type, halting.\n");
+ prom_halt();
+ }
+ *(unsigned int *) (addr + 0) = insns[0];
+ flushi(addr + 0);
+ *(unsigned int *) (addr + 4) = insns[1];
+ flushi(addr + 4);
+ *(unsigned int *) (addr + 8) = insns[2];
+ flushi(addr + 8);
+
+ p++;
+ }
+}
+
+struct leon_1insn_patch_entry {
+ unsigned int addr;
+ unsigned int insn;
+};
+
+enum sparc_cpu sparc_cpu_model;
+EXPORT_SYMBOL(sparc_cpu_model);
+
+static __init void leon_patch(void)
+{
+ struct leon_1insn_patch_entry *start = (void *)__leon_1insn_patch;
+ struct leon_1insn_patch_entry *end = (void *)__leon_1insn_patch_end;
+
+ /* Default instruction is leon - no patching */
+ if (sparc_cpu_model == sparc_leon)
+ return;
+
+ while (start < end) {
+ unsigned long addr = start->addr;
+
+ *(unsigned int *)(addr) = start->insn;
+ flushi(addr);
+
+ start++;
+ }
+}
+
+struct tt_entry *sparc_ttable;
+static struct pt_regs fake_swapper_regs;
+
+/* Called from head_32.S - before we have setup anything
+ * in the kernel. Be very careful with what you do here.
+ */
+void __init sparc32_start_kernel(struct linux_romvec *rp)
+{
+ prom_init(rp);
+
+ /* Set sparc_cpu_model */
+ sparc_cpu_model = sun_unknown;
+ if (!strcmp(&cputypval[0], "sun4m"))
+ sparc_cpu_model = sun4m;
+ if (!strcmp(&cputypval[0], "sun4s"))
+ sparc_cpu_model = sun4m; /* CP-1200 with PROM 2.30 -E */
+ if (!strcmp(&cputypval[0], "sun4d"))
+ sparc_cpu_model = sun4d;
+ if (!strcmp(&cputypval[0], "sun4e"))
+ sparc_cpu_model = sun4e;
+ if (!strcmp(&cputypval[0], "sun4u"))
+ sparc_cpu_model = sun4u;
+ if (!strncmp(&cputypval[0], "leon" , 4))
+ sparc_cpu_model = sparc_leon;
+
+ leon_patch();
+ start_kernel();
+}
+
+void __init setup_arch(char **cmdline_p)
+{
+ int i;
+ unsigned long highest_paddr;
+
+ sparc_ttable = &trapbase;
+
+ /* Initialize PROM console and command line. */
+ *cmdline_p = prom_getbootargs();
+ strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE);
+ parse_early_param();
+
+ boot_flags_init(*cmdline_p);
+
+ register_console(&prom_early_console);
+
+ printk("ARCH: ");
+ switch(sparc_cpu_model) {
+ case sun4m:
+ printk("SUN4M\n");
+ break;
+ case sun4d:
+ printk("SUN4D\n");
+ break;
+ case sun4e:
+ printk("SUN4E\n");
+ break;
+ case sun4u:
+ printk("SUN4U\n");
+ break;
+ case sparc_leon:
+ printk("LEON\n");
+ break;
+ default:
+ printk("UNKNOWN!\n");
+ break;
+ }
+
+#ifdef CONFIG_DUMMY_CONSOLE
+ conswitchp = &dummy_con;
+#endif
+
+ idprom_init();
+ load_mmu();
+
+ phys_base = 0xffffffffUL;
+ highest_paddr = 0UL;
+ for (i = 0; sp_banks[i].num_bytes != 0; i++) {
+ unsigned long top;
+
+ if (sp_banks[i].base_addr < phys_base)
+ phys_base = sp_banks[i].base_addr;
+ top = sp_banks[i].base_addr +
+ sp_banks[i].num_bytes;
+ if (highest_paddr < top)
+ highest_paddr = top;
+ }
+ pfn_base = phys_base >> PAGE_SHIFT;
+
+ if (!root_flags)
+ root_mountflags &= ~MS_RDONLY;
+ ROOT_DEV = old_decode_dev(root_dev);
+#ifdef CONFIG_BLK_DEV_RAM
+ rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
+ rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
+ rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
+#endif
+
+ prom_setsync(prom_sync_me);
+
+ if((boot_flags & BOOTME_DEBUG) && (linux_dbvec != NULL) &&
+ ((*(short *)linux_dbvec) != -1)) {
+ printk("Booted under KADB. Syncing trap table.\n");
+ (*(linux_dbvec->teach_debugger))();
+ }
+
+ init_task.thread.kregs = &fake_swapper_regs;
+
+ /* Run-time patch instructions to match the cpu model */
+ per_cpu_patch();
+
+ paging_init();
+
+ smp_setup_cpu_possible_map();
+}
+
+extern int stop_a_enabled;
+
+void sun_do_break(void)
+{
+ if (!stop_a_enabled)
+ return;
+
+ printk("\n");
+ flush_user_windows();
+
+ prom_cmdline();
+}
+EXPORT_SYMBOL(sun_do_break);
+
+int stop_a_enabled = 1;
+
+static int __init topology_init(void)
+{
+ int i, ncpus, err;
+
+ /* Count the number of physically present processors in
+ * the machine, even on uniprocessor, so that /proc/cpuinfo
+ * output is consistent with 2.4.x
+ */
+ ncpus = 0;
+ while (!cpu_find_by_instance(ncpus, NULL, NULL))
+ ncpus++;
+ ncpus_probed = ncpus;
+
+ err = 0;
+ for_each_online_cpu(i) {
+ struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
+ if (!p)
+ err = -ENOMEM;
+ else
+ register_cpu(p, i);
+ }
+
+ return err;
+}
+
+subsys_initcall(topology_init);