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-rw-r--r--arch/powerpc/kernel/setup-common.c591
1 files changed, 591 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
new file mode 100644
index 00000000000..bd3eb4292b5
--- /dev/null
+++ b/arch/powerpc/kernel/setup-common.c
@@ -0,0 +1,591 @@
+/*
+ * 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/vdso_datapage.h>
+#include <asm/pgtable.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>
+#include <asm/xmon.h>
+
+#include "setup.h"
+
+#undef DEBUG
+
+#ifdef DEBUG
+#include <asm/udbg.h>
+#define DBG(fmt...) udbg_printf(fmt)
+#else
+#define DBG(fmt...)
+#endif
+
+#ifdef CONFIG_PPC_MULTIPLATFORM
+int _machine = 0;
+EXPORT_SYMBOL(_machine);
+#endif
+
+unsigned long klimit = (unsigned long) _end;
+
+/*
+ * 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
+ pvr = per_cpu(pvr, cpu_id);
+#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(cpu_id));
+#else
+ /* show the actual temp sensor range */
+ u32 temp;
+ temp = cpu_temp_both(cpu_id);
+ 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 */
+ 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 */
+
+void __init check_for_initrd(void)
+{
+#ifdef CONFIG_BLK_DEV_INITRD
+ unsigned long *prop;
+
+ DBG(" -> check_for_initrd()\n");
+
+ if (of_chosen) {
+ prop = (unsigned long *)get_property(of_chosen,
+ "linux,initrd-start", NULL);
+ if (prop != NULL) {
+ initrd_start = (unsigned long)__va(*prop);
+ prop = (unsigned long *)get_property(of_chosen,
+ "linux,initrd-end", NULL);
+ if (prop != NULL) {
+ initrd_end = (unsigned long)__va(*prop);
+ initrd_below_start_ok = 1;
+ } else
+ initrd_start = 0;
+ }
+ }
+
+ /* If we were passed an initrd, set the ROOT_DEV properly if the values
+ * look sensible. If not, clear initrd reference.
+ */
+ if (initrd_start >= KERNELBASE && initrd_end >= KERNELBASE &&
+ initrd_end > initrd_start)
+ ROOT_DEV = Root_RAM0;
+ else
+ initrd_start = initrd_end = 0;
+
+ if (initrd_start)
+ printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end);
+
+ DBG(" <- check_for_initrd()\n");
+#endif /* CONFIG_BLK_DEV_INITRD */
+}
+
+#ifdef CONFIG_SMP
+
+/**
+ * setup_cpu_maps - initialize the following cpu maps:
+ * cpu_possible_map
+ * cpu_present_map
+ * cpu_sibling_map
+ *
+ * Having the possible map set up early allows us to restrict allocations
+ * of things like irqstacks to num_possible_cpus() rather than NR_CPUS.
+ *
+ * We do not initialize the online map here; cpus set their own bits in
+ * cpu_online_map as they come up.
+ *
+ * This function is valid only for Open Firmware systems. finish_device_tree
+ * must be called before using this.
+ *
+ * While we're here, we may as well set the "physical" cpu ids in the paca.
+ */
+void __init smp_setup_cpu_maps(void)
+{
+ struct device_node *dn = NULL;
+ int cpu = 0;
+ int swap_cpuid = 0;
+
+ while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) {
+ int *intserv;
+ int j, len = sizeof(u32), nthreads = 1;
+
+ intserv = (int *)get_property(dn, "ibm,ppc-interrupt-server#s",
+ &len);
+ if (intserv)
+ nthreads = len / sizeof(int);
+ else {
+ intserv = (int *) get_property(dn, "reg", NULL);
+ if (!intserv)
+ intserv = &cpu; /* assume logical == phys */
+ }
+
+ for (j = 0; j < nthreads && cpu < NR_CPUS; j++) {
+ cpu_set(cpu, cpu_present_map);
+ set_hard_smp_processor_id(cpu, intserv[j]);
+
+ if (intserv[j] == boot_cpuid_phys)
+ swap_cpuid = cpu;
+ cpu_set(cpu, cpu_possible_map);
+ cpu++;
+ }
+ }
+
+ /* Swap CPU id 0 with boot_cpuid_phys, so we can always assume that
+ * boot cpu is logical 0.
+ */
+ if (boot_cpuid_phys != get_hard_smp_processor_id(0)) {
+ u32 tmp;
+ tmp = get_hard_smp_processor_id(0);
+ set_hard_smp_processor_id(0, boot_cpuid_phys);
+ set_hard_smp_processor_id(swap_cpuid, tmp);
+ }
+
+#ifdef CONFIG_PPC64
+ /*
+ * On pSeries LPAR, we need to know how many cpus
+ * could possibly be added to this partition.
+ */
+ if (_machine == PLATFORM_PSERIES_LPAR &&
+ (dn = of_find_node_by_path("/rtas"))) {
+ int num_addr_cell, num_size_cell, maxcpus;
+ unsigned int *ireg;
+
+ num_addr_cell = prom_n_addr_cells(dn);
+ num_size_cell = prom_n_size_cells(dn);
+
+ ireg = (unsigned int *)
+ get_property(dn, "ibm,lrdr-capacity", NULL);
+
+ if (!ireg)
+ goto out;
+
+ maxcpus = ireg[num_addr_cell + num_size_cell];
+
+ /* Double maxcpus for processors which have SMT capability */
+ if (cpu_has_feature(CPU_FTR_SMT))
+ maxcpus *= 2;
+
+ if (maxcpus > NR_CPUS) {
+ printk(KERN_WARNING
+ "Partition configured for %d cpus, "
+ "operating system maximum is %d.\n",
+ maxcpus, NR_CPUS);
+ maxcpus = NR_CPUS;
+ } else
+ printk(KERN_INFO "Partition configured for %d cpus.\n",
+ maxcpus);
+
+ for (cpu = 0; cpu < maxcpus; cpu++)
+ cpu_set(cpu, cpu_possible_map);
+ out:
+ of_node_put(dn);
+ }
+
+ /*
+ * Do the sibling map; assume only two threads per processor.
+ */
+ for_each_cpu(cpu) {
+ cpu_set(cpu, cpu_sibling_map[cpu]);
+ if (cpu_has_feature(CPU_FTR_SMT))
+ cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]);
+ }
+
+ vdso_data->processorCount = num_present_cpus();
+#endif /* CONFIG_PPC64 */
+}
+#endif /* CONFIG_SMP */
+
+#ifdef CONFIG_XMON
+static int __init early_xmon(char *p)
+{
+ /* ensure xmon is enabled */
+ if (p) {
+ if (strncmp(p, "on", 2) == 0)
+ xmon_init(1);
+ if (strncmp(p, "off", 3) == 0)
+ xmon_init(0);
+ if (strncmp(p, "early", 5) != 0)
+ return 0;
+ }
+ xmon_init(1);
+ debugger(NULL);
+
+ return 0;
+}
+early_param("xmon", early_xmon);
+#endif