powerpc: Pull common bits of setup_{32,64}.c into setup-common.c

This creates a new arch/powerpc/kernel/setup-common.c with various
bits that setup_32.c and setup_64.c had in common - functions like
machine_shutdown/restart/power_off, show_cpuinfo, set_preferred_console
etc.

Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 412 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
new file mode 100644
index 000000000000..d4f0a4c3b5bc
--- /dev/null
+++ b/arch/powerpc/kernel/setup-common.c
@@ -0,0 +1,412 @@
+/*
+ * Common boot and setup code for both 32-bit and 64-bit.
+ * Extracted from arch/powerpc/kernel/setup_64.c.
+ *
+ * Copyright (C) 2001 PPC64 Team, IBM Corp
+ *
+ *      This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License
+ *      as published by the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ */
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/reboot.h>
+#include <linux/delay.h>
+#include <linux/initrd.h>
+#include <linux/ide.h>
+#include <linux/seq_file.h>
+#include <linux/ioport.h>
+#include <linux/console.h>
+#include <linux/utsname.h>
+#include <linux/tty.h>
+#include <linux/root_dev.h>
+#include <linux/notifier.h>
+#include <linux/cpu.h>
+#include <linux/unistd.h>
+#include <linux/serial.h>
+#include <linux/serial_8250.h>
+#include <asm/io.h>
+#include <asm/prom.h>
+#include <asm/processor.h>
+#include <asm/pgtable.h>
+#include <asm/bootinfo.h>
+#include <asm/smp.h>
+#include <asm/elf.h>
+#include <asm/machdep.h>
+#include <asm/time.h>
+#include <asm/cputable.h>
+#include <asm/sections.h>
+#include <asm/btext.h>
+#include <asm/nvram.h>
+#include <asm/setup.h>
+#include <asm/system.h>
+#include <asm/rtas.h>
+#include <asm/iommu.h>
+#include <asm/serial.h>
+#include <asm/cache.h>
+#include <asm/page.h>
+#include <asm/mmu.h>
+#include <asm/lmb.h>
+
+#undef DEBUG
+
+#ifdef DEBUG
+#define DBG(fmt...) udbg_printf(fmt)
+#else
+#define DBG(fmt...)
+#endif
+
+/*
+ * This still seems to be needed... -- paulus
+ */ 
+struct screen_info screen_info = {
+        .orig_x = 0,
+        .orig_y = 25,
+        .orig_video_cols = 80,
+        .orig_video_lines = 25,
+        .orig_video_isVGA = 1,
+        .orig_video_points = 16
+};
+
+#ifdef __DO_IRQ_CANON
+/* XXX should go elsewhere eventually */
+int ppc_do_canonicalize_irqs;
+EXPORT_SYMBOL(ppc_do_canonicalize_irqs);
+#endif
+
+/* also used by kexec */
+void machine_shutdown(void)
+{
+        if (ppc_md.nvram_sync)
+                ppc_md.nvram_sync();
+}
+
+void machine_restart(char *cmd)
+{
+        machine_shutdown();
+        ppc_md.restart(cmd);
+#ifdef CONFIG_SMP
+        smp_send_stop();
+#endif
+        printk(KERN_EMERG "System Halted, OK to turn off power\n");
+        local_irq_disable();
+        while (1) ;
+}
+
+void machine_power_off(void)
+{
+        machine_shutdown();
+        ppc_md.power_off();
+#ifdef CONFIG_SMP
+        smp_send_stop();
+#endif
+        printk(KERN_EMERG "System Halted, OK to turn off power\n");
+        local_irq_disable();
+        while (1) ;
+}
+/* Used by the G5 thermal driver */
+EXPORT_SYMBOL_GPL(machine_power_off);
+
+void (*pm_power_off)(void) = machine_power_off;
+EXPORT_SYMBOL_GPL(pm_power_off);
+
+void machine_halt(void)
+{
+        machine_shutdown();
+        ppc_md.halt();
+#ifdef CONFIG_SMP
+        smp_send_stop();
+#endif
+        printk(KERN_EMERG "System Halted, OK to turn off power\n");
+        local_irq_disable();
+        while (1) ;
+}
+
+
+#ifdef CONFIG_TAU
+extern u32 cpu_temp(unsigned long cpu);
+extern u32 cpu_temp_both(unsigned long cpu);
+#endif /* CONFIG_TAU */
+
+#ifdef CONFIG_SMP
+DEFINE_PER_CPU(unsigned int, pvr);
+#endif
+
+static int show_cpuinfo(struct seq_file *m, void *v)
+{
+        unsigned long cpu_id = (unsigned long)v - 1;
+        unsigned int pvr;
+        unsigned short maj;
+        unsigned short min;
+
+        if (cpu_id == NR_CPUS) {
+#if defined(CONFIG_SMP) && defined(CONFIG_PPC32)
+                unsigned long bogosum = 0;
+                int i;
+                for (i = 0; i < NR_CPUS; ++i)
+                        if (cpu_online(i))
+                                bogosum += loops_per_jiffy;
+                seq_printf(m, "total bogomips\t: %lu.%02lu\n",
+                           bogosum/(500000/HZ), bogosum/(5000/HZ) % 100);
+#endif /* CONFIG_SMP && CONFIG_PPC32 */
+                seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq);
+
+                if (ppc_md.show_cpuinfo != NULL)
+                        ppc_md.show_cpuinfo(m);
+
+                return 0;
+        }
+
+        /* We only show online cpus: disable preempt (overzealous, I
+         * knew) to prevent cpu going down. */
+        preempt_disable();
+        if (!cpu_online(cpu_id)) {
+                preempt_enable();
+                return 0;
+        }
+
+#ifdef CONFIG_SMP
+#ifdef CONFIG_PPC64     /* XXX for now */
+        pvr = per_cpu(pvr, cpu_id);
+#else
+        pvr = cpu_data[cpu_id].pvr;
+#endif
+#else
+        pvr = mfspr(SPRN_PVR);
+#endif
+        maj = (pvr >> 8) & 0xFF;
+        min = pvr & 0xFF;
+
+        seq_printf(m, "processor\t: %lu\n", cpu_id);
+        seq_printf(m, "cpu\t\t: ");
+
+        if (cur_cpu_spec->pvr_mask)
+                seq_printf(m, "%s", cur_cpu_spec->cpu_name);
+        else
+                seq_printf(m, "unknown (%08x)", pvr);
+
+#ifdef CONFIG_ALTIVEC
+        if (cpu_has_feature(CPU_FTR_ALTIVEC))
+                seq_printf(m, ", altivec supported");
+#endif /* CONFIG_ALTIVEC */
+
+        seq_printf(m, "\n");
+
+#ifdef CONFIG_TAU
+        if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) {
+#ifdef CONFIG_TAU_AVERAGE
+                /* more straightforward, but potentially misleading */
+                seq_printf(m,  "temperature \t: %u C (uncalibrated)\n",
+                           cpu_temp(i));
+#else
+                /* show the actual temp sensor range */
+                u32 temp;
+                temp = cpu_temp_both(i);
+                seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
+                           temp & 0xff, temp >> 16);
+#endif
+        }
+#endif /* CONFIG_TAU */
+
+        /*
+         * Assume here that all clock rates are the same in a
+         * smp system.  -- Cort
+         */
+        if (ppc_proc_freq)
+                seq_printf(m, "clock\t\t: %lu.%06luMHz\n",
+                           ppc_proc_freq / 1000000, ppc_proc_freq % 1000000);
+
+        if (ppc_md.show_percpuinfo != NULL)
+                ppc_md.show_percpuinfo(m, cpu_id);
+
+        /* If we are a Freescale core do a simple check so
+         * we dont have to keep adding cases in the future */
+        if (PVR_VER(pvr) & 0x8000) {
+                maj = PVR_MAJ(pvr);
+                min = PVR_MIN(pvr);
+        } else {
+                switch (PVR_VER(pvr)) {
+                        case 0x0020:    /* 403 family */
+                                maj = PVR_MAJ(pvr) + 1;
+                                min = PVR_MIN(pvr);
+                                break;
+                        case 0x1008:    /* 740P/750P ?? */
+                                maj = ((pvr >> 8) & 0xFF) - 1;
+                                min = pvr & 0xFF;
+                                break;
+                        default:
+                                maj = (pvr >> 8) & 0xFF;
+                                min = pvr & 0xFF;
+                                break;
+                }
+        }
+
+        seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
+                   maj, min, PVR_VER(pvr), PVR_REV(pvr));
+
+#ifdef CONFIG_PPC32
+        seq_printf(m, "bogomips\t: %lu.%02lu\n",
+                   loops_per_jiffy / (500000/HZ),
+                   (loops_per_jiffy / (5000/HZ)) % 100);
+#endif
+
+#ifdef CONFIG_SMP
+        seq_printf(m, "\n");
+#endif
+
+        preempt_enable();
+        return 0;
+}
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+        unsigned long i = *pos;
+
+        return i <= NR_CPUS ? (void *)(i + 1) : 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)
+{
+}
+
+struct seq_operations cpuinfo_op = {
+        .start =c_start,
+        .next = c_next,
+        .stop = c_stop,
+        .show = show_cpuinfo,
+};
+
+#ifdef CONFIG_PPC_MULTIPLATFORM
+static int __init set_preferred_console(void)
+{
+        struct device_node *prom_stdout = NULL;
+        char *name;
+        u32 *spd;
+        int offset = 0;
+
+        DBG(" -> set_preferred_console()\n");
+
+        /* The user has requested a console so this is already set up. */
+        if (strstr(saved_command_line, "console=")) {
+                DBG(" console was specified !\n");
+                return -EBUSY;
+        }
+
+        if (!of_chosen) {
+                DBG(" of_chosen is NULL !\n");
+                return -ENODEV;
+        }
+        /* We are getting a weird phandle from OF ... */
+        /* ... So use the full path instead */
+        name = (char *)get_property(of_chosen, "linux,stdout-path", NULL);
+        if (name == NULL) {
+                DBG(" no linux,stdout-path !\n");
+                return -ENODEV;
+        }
+        prom_stdout = of_find_node_by_path(name);
+        if (!prom_stdout) {
+                DBG(" can't find stdout package %s !\n", name);
+                return -ENODEV;
+        }       
+        DBG("stdout is %s\n", prom_stdout->full_name);
+
+        name = (char *)get_property(prom_stdout, "name", NULL);
+        if (!name) {
+                DBG(" stdout package has no name !\n");
+                goto not_found;
+        }
+        spd = (u32 *)get_property(prom_stdout, "current-speed", NULL);
+
+        if (0)
+                ;
+#ifdef CONFIG_SERIAL_8250_CONSOLE
+        else if (strcmp(name, "serial") == 0) {
+                int i;
+                u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i);
+                if (i > 8) {
+                        switch (reg[1]) {
+                                case 0x3f8:
+                                        offset = 0;
+                                        break;
+                                case 0x2f8:
+                                        offset = 1;
+                                        break;
+                                case 0x898:
+                                        offset = 2;
+                                        break;
+                                case 0x890:
+                                        offset = 3;
+                                        break;
+                                default:
+                                        /* We dont recognise the serial port */
+                                        goto not_found;
+                        }
+                }
+        }
+#endif /* CONFIG_SERIAL_8250_CONSOLE */
+#ifdef CONFIG_PPC_PSERIES
+        else if (strcmp(name, "vty") == 0) {
+                u32 *reg = (u32 *)get_property(prom_stdout, "reg", NULL);
+                char *compat = (char *)get_property(prom_stdout, "compatible", NULL);
+
+                if (reg && compat && (strcmp(compat, "hvterm-protocol") == 0)) {
+                        /* Host Virtual Serial Interface */
+                        int offset;
+                        switch (reg[0]) {
+                                case 0x30000000:
+                                        offset = 0;
+                                        break;
+                                case 0x30000001:
+                                        offset = 1;
+                                        break;
+                                default:
+                                        goto not_found;
+                        }
+                        of_node_put(prom_stdout);
+                        DBG("Found hvsi console at offset %d\n", offset);
+                        return add_preferred_console("hvsi", offset, NULL);
+                } else {
+                        /* pSeries LPAR virtual console */
+                        of_node_put(prom_stdout);
+                        DBG("Found hvc console\n");
+                        return add_preferred_console("hvc", 0, NULL);
+                }
+        }
+#endif /* CONFIG_PPC_PSERIES */
+#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
+        else if (strcmp(name, "ch-a") == 0)
+                offset = 0;
+        else if (strcmp(name, "ch-b") == 0)
+                offset = 1;
+#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */
+        else
+                goto not_found;
+        of_node_put(prom_stdout);
+
+        DBG("Found serial console at ttyS%d\n", offset);
+
+        if (spd) {
+                static char __initdata opt[16];
+                sprintf(opt, "%d", *spd);
+                return add_preferred_console("ttyS", offset, opt);
+        } else
+                return add_preferred_console("ttyS", offset, NULL);
+
+ not_found:
+        DBG("No preferred console found !\n");
+        of_node_put(prom_stdout);
+        return -ENODEV;
+}
+console_initcall(set_preferred_console);
+#endif /* CONFIG_PPC_MULTIPLATFORM */