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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/ppc/kernel/setup.c
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/ppc/kernel/setup.c')
-rw-r--r--arch/ppc/kernel/setup.c778
1 files changed, 778 insertions, 0 deletions
diff --git a/arch/ppc/kernel/setup.c b/arch/ppc/kernel/setup.c
new file mode 100644
index 00000000000..e97ce635b99
--- /dev/null
+++ b/arch/ppc/kernel/setup.c
@@ -0,0 +1,778 @@
+/*
+ * Common prep/pmac/chrp boot and setup code.
+ */
+
+#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/tty.h>
+#include <linux/bootmem.h>
+#include <linux/seq_file.h>
+#include <linux/root_dev.h>
+#include <linux/cpu.h>
+#include <linux/console.h>
+
+#include <asm/residual.h>
+#include <asm/io.h>
+#include <asm/prom.h>
+#include <asm/processor.h>
+#include <asm/pgtable.h>
+#include <asm/bootinfo.h>
+#include <asm/setup.h>
+#include <asm/amigappc.h>
+#include <asm/smp.h>
+#include <asm/elf.h>
+#include <asm/cputable.h>
+#include <asm/bootx.h>
+#include <asm/btext.h>
+#include <asm/machdep.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/pmac_feature.h>
+#include <asm/sections.h>
+#include <asm/nvram.h>
+#include <asm/xmon.h>
+#include <asm/ocp.h>
+
+#if defined(CONFIG_85xx) || defined(CONFIG_83xx)
+#include <asm/ppc_sys.h>
+#endif
+
+#if defined CONFIG_KGDB
+#include <asm/kgdb.h>
+#endif
+
+extern void platform_init(unsigned long r3, unsigned long r4,
+ unsigned long r5, unsigned long r6, unsigned long r7);
+extern void bootx_init(unsigned long r4, unsigned long phys);
+extern void identify_cpu(unsigned long offset, unsigned long cpu);
+extern void do_cpu_ftr_fixups(unsigned long offset);
+extern void reloc_got2(unsigned long offset);
+
+extern void ppc6xx_idle(void);
+extern void power4_idle(void);
+
+extern boot_infos_t *boot_infos;
+struct ide_machdep_calls ppc_ide_md;
+char *sysmap;
+unsigned long sysmap_size;
+
+/* Used with the BI_MEMSIZE bootinfo parameter to store the memory
+ size value reported by the boot loader. */
+unsigned long boot_mem_size;
+
+unsigned long ISA_DMA_THRESHOLD;
+unsigned long DMA_MODE_READ, DMA_MODE_WRITE;
+
+#ifdef CONFIG_PPC_MULTIPLATFORM
+int _machine = 0;
+
+extern void prep_init(unsigned long r3, unsigned long r4,
+ unsigned long r5, unsigned long r6, unsigned long r7);
+extern void pmac_init(unsigned long r3, unsigned long r4,
+ unsigned long r5, unsigned long r6, unsigned long r7);
+extern void chrp_init(unsigned long r3, unsigned long r4,
+ unsigned long r5, unsigned long r6, unsigned long r7);
+#endif /* CONFIG_PPC_MULTIPLATFORM */
+
+#ifdef CONFIG_MAGIC_SYSRQ
+unsigned long SYSRQ_KEY = 0x54;
+#endif /* CONFIG_MAGIC_SYSRQ */
+
+#ifdef CONFIG_VGA_CONSOLE
+unsigned long vgacon_remap_base;
+#endif
+
+struct machdep_calls ppc_md;
+
+/*
+ * These are used in binfmt_elf.c to put aux entries on the stack
+ * for each elf executable being started.
+ */
+int dcache_bsize;
+int icache_bsize;
+int ucache_bsize;
+
+#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_FB_VGA16) || \
+ defined(CONFIG_FB_VGA16_MODULE) || defined(CONFIG_FB_VESA)
+struct screen_info screen_info = {
+ 0, 25, /* orig-x, orig-y */
+ 0, /* unused */
+ 0, /* orig-video-page */
+ 0, /* orig-video-mode */
+ 80, /* orig-video-cols */
+ 0,0,0, /* ega_ax, ega_bx, ega_cx */
+ 25, /* orig-video-lines */
+ 1, /* orig-video-isVGA */
+ 16 /* orig-video-points */
+};
+#endif /* CONFIG_VGA_CONSOLE || CONFIG_FB_VGA16 || CONFIG_FB_VESA */
+
+void machine_restart(char *cmd)
+{
+#ifdef CONFIG_NVRAM
+ nvram_sync();
+#endif
+ ppc_md.restart(cmd);
+}
+
+EXPORT_SYMBOL(machine_restart);
+
+void machine_power_off(void)
+{
+#ifdef CONFIG_NVRAM
+ nvram_sync();
+#endif
+ ppc_md.power_off();
+}
+
+EXPORT_SYMBOL(machine_power_off);
+
+void machine_halt(void)
+{
+#ifdef CONFIG_NVRAM
+ nvram_sync();
+#endif
+ ppc_md.halt();
+}
+
+EXPORT_SYMBOL(machine_halt);
+
+void (*pm_power_off)(void) = machine_power_off;
+
+#ifdef CONFIG_TAU
+extern u32 cpu_temp(unsigned long cpu);
+extern u32 cpu_temp_both(unsigned long cpu);
+#endif /* CONFIG_TAU */
+
+int show_cpuinfo(struct seq_file *m, void *v)
+{
+ int i = (int) v - 1;
+ int err = 0;
+ unsigned int pvr;
+ unsigned short maj, min;
+ unsigned long lpj;
+
+ if (i >= NR_CPUS) {
+ /* Show summary information */
+#ifdef CONFIG_SMP
+ unsigned long bogosum = 0;
+ for (i = 0; i < NR_CPUS; ++i)
+ if (cpu_online(i))
+ bogosum += cpu_data[i].loops_per_jiffy;
+ seq_printf(m, "total bogomips\t: %lu.%02lu\n",
+ bogosum/(500000/HZ), bogosum/(5000/HZ) % 100);
+#endif /* CONFIG_SMP */
+
+ if (ppc_md.show_cpuinfo != NULL)
+ err = ppc_md.show_cpuinfo(m);
+ return err;
+ }
+
+#ifdef CONFIG_SMP
+ if (!cpu_online(i))
+ return 0;
+ pvr = cpu_data[i].pvr;
+ lpj = cpu_data[i].loops_per_jiffy;
+#else
+ pvr = mfspr(SPRN_PVR);
+ lpj = loops_per_jiffy;
+#endif
+
+ seq_printf(m, "processor\t: %d\n", i);
+ seq_printf(m, "cpu\t\t: ");
+
+ if (cur_cpu_spec[i]->pvr_mask)
+ seq_printf(m, "%s", cur_cpu_spec[i]->cpu_name);
+ else
+ seq_printf(m, "unknown (%08x)", pvr);
+#ifdef CONFIG_ALTIVEC
+ if (cur_cpu_spec[i]->cpu_features & CPU_FTR_ALTIVEC)
+ seq_printf(m, ", altivec supported");
+#endif
+ seq_printf(m, "\n");
+
+#ifdef CONFIG_TAU
+ if (cur_cpu_spec[i]->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 */
+
+ if (ppc_md.show_percpuinfo != NULL) {
+ err = ppc_md.show_percpuinfo(m, i);
+ if (err)
+ return err;
+ }
+
+ 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;
+ case 0x8083: /* e300 */
+ maj = PVR_MAJ(pvr);
+ min = PVR_MIN(pvr);
+ break;
+ case 0x8020: /* e500 */
+ maj = PVR_MAJ(pvr);
+ min = PVR_MIN(pvr);
+ 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));
+
+ seq_printf(m, "bogomips\t: %lu.%02lu\n",
+ lpj / (500000/HZ), (lpj / (5000/HZ)) % 100);
+
+#if defined(CONFIG_85xx) || defined(CONFIG_83xx)
+ if (cur_ppc_sys_spec->ppc_sys_name)
+ seq_printf(m, "chipset\t\t: %s\n",
+ cur_ppc_sys_spec->ppc_sys_name);
+#endif
+
+#ifdef CONFIG_SMP
+ seq_printf(m, "\n");
+#endif
+
+ return 0;
+}
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+ int 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,
+};
+
+/*
+ * We're called here very early in the boot. We determine the machine
+ * type and call the appropriate low-level setup functions.
+ * -- Cort <cort@fsmlabs.com>
+ *
+ * Note that the kernel may be running at an address which is different
+ * from the address that it was linked at, so we must use RELOC/PTRRELOC
+ * to access static data (including strings). -- paulus
+ */
+__init
+unsigned long
+early_init(int r3, int r4, int r5)
+{
+ unsigned long phys;
+ unsigned long offset = reloc_offset();
+
+ /* Default */
+ phys = offset + KERNELBASE;
+
+ /* First zero the BSS -- use memset, some arches don't have
+ * caches on yet */
+ memset_io(PTRRELOC(&__bss_start), 0, _end - __bss_start);
+
+ /*
+ * Identify the CPU type and fix up code sections
+ * that depend on which cpu we have.
+ */
+ identify_cpu(offset, 0);
+ do_cpu_ftr_fixups(offset);
+
+#if defined(CONFIG_PPC_MULTIPLATFORM)
+ reloc_got2(offset);
+
+ /* If we came here from BootX, clear the screen,
+ * set up some pointers and return. */
+ if ((r3 == 0x426f6f58) && (r5 == 0))
+ bootx_init(r4, phys);
+
+ /*
+ * don't do anything on prep
+ * for now, don't use bootinfo because it breaks yaboot 0.5
+ * and assume that if we didn't find a magic number, we have OF
+ */
+ else if (*(unsigned long *)(0) != 0xdeadc0de)
+ phys = prom_init(r3, r4, (prom_entry)r5);
+
+ reloc_got2(-offset);
+#endif
+
+ return phys;
+}
+
+#ifdef CONFIG_PPC_OF
+/*
+ * Assume here that all clock rates are the same in a
+ * smp system. -- Cort
+ */
+int __openfirmware
+of_show_percpuinfo(struct seq_file *m, int i)
+{
+ struct device_node *cpu_node;
+ u32 *fp;
+ int s;
+
+ cpu_node = find_type_devices("cpu");
+ if (!cpu_node)
+ return 0;
+ for (s = 0; s < i && cpu_node->next; s++)
+ cpu_node = cpu_node->next;
+ fp = (u32 *)get_property(cpu_node, "clock-frequency", NULL);
+ if (fp)
+ seq_printf(m, "clock\t\t: %dMHz\n", *fp / 1000000);
+ return 0;
+}
+
+void __init
+intuit_machine_type(void)
+{
+ char *model;
+ struct device_node *root;
+
+ /* ask the OF info if we're a chrp or pmac */
+ root = find_path_device("/");
+ if (root != 0) {
+ /* assume pmac unless proven to be chrp -- Cort */
+ _machine = _MACH_Pmac;
+ model = get_property(root, "device_type", NULL);
+ if (model && !strncmp("chrp", model, 4))
+ _machine = _MACH_chrp;
+ else {
+ model = get_property(root, "model", NULL);
+ if (model && !strncmp(model, "IBM", 3))
+ _machine = _MACH_chrp;
+ }
+ }
+}
+#endif
+
+#ifdef CONFIG_PPC_MULTIPLATFORM
+/*
+ * The PPC_MULTIPLATFORM version of platform_init...
+ */
+void __init
+platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
+ unsigned long r6, unsigned long r7)
+{
+#ifdef CONFIG_BOOTX_TEXT
+ if (boot_text_mapped) {
+ btext_clearscreen();
+ btext_welcome();
+ }
+#endif
+
+ parse_bootinfo(find_bootinfo());
+
+ /* if we didn't get any bootinfo telling us what we are... */
+ if (_machine == 0) {
+ /* prep boot loader tells us if we're prep or not */
+ if ( *(unsigned long *)(KERNELBASE) == (0xdeadc0de) )
+ _machine = _MACH_prep;
+ }
+
+ /* not much more to do here, if prep */
+ if (_machine == _MACH_prep) {
+ prep_init(r3, r4, r5, r6, r7);
+ return;
+ }
+
+ /* prom_init has already been called from __start */
+ if (boot_infos)
+ relocate_nodes();
+
+ /* If we aren't PReP, we can find out if we're Pmac
+ * or CHRP with this. */
+ if (_machine == 0)
+ intuit_machine_type();
+
+ /* finish_device_tree may need _machine defined. */
+ finish_device_tree();
+
+ /*
+ * If we were booted via quik, r3 points to the physical
+ * address of the command-line parameters.
+ * If we were booted from an xcoff image (i.e. netbooted or
+ * booted from floppy), we get the command line from the
+ * bootargs property of the /chosen node.
+ * If an initial ramdisk is present, r3 and r4
+ * are used for initrd_start and initrd_size,
+ * otherwise they contain 0xdeadbeef.
+ */
+ if (r3 >= 0x4000 && r3 < 0x800000 && r4 == 0) {
+ strlcpy(cmd_line, (char *)r3 + KERNELBASE,
+ sizeof(cmd_line));
+ } else if (boot_infos != 0) {
+ /* booted by BootX - check for ramdisk */
+ if (boot_infos->kernelParamsOffset != 0)
+ strlcpy(cmd_line, (char *) boot_infos
+ + boot_infos->kernelParamsOffset,
+ sizeof(cmd_line));
+#ifdef CONFIG_BLK_DEV_INITRD
+ if (boot_infos->ramDisk) {
+ initrd_start = (unsigned long) boot_infos
+ + boot_infos->ramDisk;
+ initrd_end = initrd_start + boot_infos->ramDiskSize;
+ initrd_below_start_ok = 1;
+ }
+#endif
+ } else {
+ struct device_node *chosen;
+ char *p;
+
+#ifdef CONFIG_BLK_DEV_INITRD
+ if (r3 && r4 && r4 != 0xdeadbeef) {
+ if (r3 < KERNELBASE)
+ r3 += KERNELBASE;
+ initrd_start = r3;
+ initrd_end = r3 + r4;
+ ROOT_DEV = Root_RAM0;
+ initrd_below_start_ok = 1;
+ }
+#endif
+ chosen = find_devices("chosen");
+ if (chosen != NULL) {
+ p = get_property(chosen, "bootargs", NULL);
+ if (p && *p) {
+ strlcpy(cmd_line, p, sizeof(cmd_line));
+ }
+ }
+ }
+#ifdef CONFIG_ADB
+ if (strstr(cmd_line, "adb_sync")) {
+ extern int __adb_probe_sync;
+ __adb_probe_sync = 1;
+ }
+#endif /* CONFIG_ADB */
+
+ switch (_machine) {
+ case _MACH_Pmac:
+ pmac_init(r3, r4, r5, r6, r7);
+ break;
+ case _MACH_chrp:
+ chrp_init(r3, r4, r5, r6, r7);
+ break;
+ }
+}
+
+#ifdef CONFIG_SERIAL_CORE_CONSOLE
+extern char *of_stdout_device;
+
+static int __init set_preferred_console(void)
+{
+ struct device_node *prom_stdout;
+ char *name;
+ int offset;
+
+ if (of_stdout_device == NULL)
+ return -ENODEV;
+
+ /* The user has requested a console so this is already set up. */
+ if (strstr(saved_command_line, "console="))
+ return -EBUSY;
+
+ prom_stdout = find_path_device(of_stdout_device);
+ if (!prom_stdout)
+ return -ENODEV;
+
+ name = (char *)get_property(prom_stdout, "name", NULL);
+ if (!name)
+ return -ENODEV;
+
+ 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 */
+ return -ENODEV;
+ }
+ }
+ } else if (strcmp(name, "ch-a") == 0)
+ offset = 0;
+ else if (strcmp(name, "ch-b") == 0)
+ offset = 1;
+ else
+ return -ENODEV;
+ return add_preferred_console("ttyS", offset, NULL);
+}
+console_initcall(set_preferred_console);
+#endif /* CONFIG_SERIAL_CORE_CONSOLE */
+#endif /* CONFIG_PPC_MULTIPLATFORM */
+
+struct bi_record *find_bootinfo(void)
+{
+ struct bi_record *rec;
+
+ rec = (struct bi_record *)_ALIGN((ulong)__bss_start+(1<<20)-1,(1<<20));
+ if ( rec->tag != BI_FIRST ) {
+ /*
+ * This 0x10000 offset is a terrible hack but it will go away when
+ * we have the bootloader handle all the relocation and
+ * prom calls -- Cort
+ */
+ rec = (struct bi_record *)_ALIGN((ulong)__bss_start+0x10000+(1<<20)-1,(1<<20));
+ if ( rec->tag != BI_FIRST )
+ return NULL;
+ }
+ return rec;
+}
+
+void parse_bootinfo(struct bi_record *rec)
+{
+ if (rec == NULL || rec->tag != BI_FIRST)
+ return;
+ while (rec->tag != BI_LAST) {
+ ulong *data = rec->data;
+ switch (rec->tag) {
+ case BI_CMD_LINE:
+ strlcpy(cmd_line, (void *)data, sizeof(cmd_line));
+ break;
+ case BI_SYSMAP:
+ sysmap = (char *)((data[0] >= (KERNELBASE)) ? data[0] :
+ (data[0]+KERNELBASE));
+ sysmap_size = data[1];
+ break;
+#ifdef CONFIG_BLK_DEV_INITRD
+ case BI_INITRD:
+ initrd_start = data[0] + KERNELBASE;
+ initrd_end = data[0] + data[1] + KERNELBASE;
+ break;
+#endif /* CONFIG_BLK_DEV_INITRD */
+#ifdef CONFIG_PPC_MULTIPLATFORM
+ case BI_MACHTYPE:
+ _machine = data[0];
+ break;
+#endif
+ case BI_MEMSIZE:
+ boot_mem_size = data[0];
+ break;
+ }
+ rec = (struct bi_record *)((ulong)rec + rec->size);
+ }
+}
+
+/*
+ * Find out what kind of machine we're on and save any data we need
+ * from the early boot process (devtree is copied on pmac by prom_init()).
+ * This is called very early on the boot process, after a minimal
+ * MMU environment has been set up but before MMU_init is called.
+ */
+void __init
+machine_init(unsigned long r3, unsigned long r4, unsigned long r5,
+ unsigned long r6, unsigned long r7)
+{
+#ifdef CONFIG_CMDLINE
+ strlcpy(cmd_line, CONFIG_CMDLINE, sizeof(cmd_line));
+#endif /* CONFIG_CMDLINE */
+
+#ifdef CONFIG_6xx
+ ppc_md.power_save = ppc6xx_idle;
+#endif
+#ifdef CONFIG_POWER4
+ ppc_md.power_save = power4_idle;
+#endif
+
+ platform_init(r3, r4, r5, r6, r7);
+
+ if (ppc_md.progress)
+ ppc_md.progress("id mach(): done", 0x200);
+}
+
+/* Checks "l2cr=xxxx" command-line option */
+int __init ppc_setup_l2cr(char *str)
+{
+ if (cpu_has_feature(CPU_FTR_L2CR)) {
+ unsigned long val = simple_strtoul(str, NULL, 0);
+ printk(KERN_INFO "l2cr set to %lx\n", val);
+ _set_L2CR(0); /* force invalidate by disable cache */
+ _set_L2CR(val); /* and enable it */
+ }
+ return 1;
+}
+__setup("l2cr=", ppc_setup_l2cr);
+
+#ifdef CONFIG_GENERIC_NVRAM
+
+/* Generic nvram hooks used by drivers/char/gen_nvram.c */
+unsigned char nvram_read_byte(int addr)
+{
+ if (ppc_md.nvram_read_val)
+ return ppc_md.nvram_read_val(addr);
+ return 0xff;
+}
+EXPORT_SYMBOL(nvram_read_byte);
+
+void nvram_write_byte(unsigned char val, int addr)
+{
+ if (ppc_md.nvram_write_val)
+ ppc_md.nvram_write_val(addr, val);
+}
+EXPORT_SYMBOL(nvram_write_byte);
+
+void nvram_sync(void)
+{
+ if (ppc_md.nvram_sync)
+ ppc_md.nvram_sync();
+}
+EXPORT_SYMBOL(nvram_sync);
+
+#endif /* CONFIG_NVRAM */
+
+static struct cpu cpu_devices[NR_CPUS];
+
+int __init ppc_init(void)
+{
+ int i;
+
+ /* clear the progress line */
+ if ( ppc_md.progress ) ppc_md.progress(" ", 0xffff);
+
+ /* register CPU devices */
+ for (i = 0; i < NR_CPUS; i++)
+ if (cpu_possible(i))
+ register_cpu(&cpu_devices[i], i, NULL);
+
+ /* call platform init */
+ if (ppc_md.init != NULL) {
+ ppc_md.init();
+ }
+ return 0;
+}
+
+arch_initcall(ppc_init);
+
+/* Warning, IO base is not yet inited */
+void __init setup_arch(char **cmdline_p)
+{
+ extern char *klimit;
+ extern void do_init_bootmem(void);
+
+ /* so udelay does something sensible, assume <= 1000 bogomips */
+ loops_per_jiffy = 500000000 / HZ;
+
+#ifdef CONFIG_PPC_MULTIPLATFORM
+ /* This could be called "early setup arch", it must be done
+ * now because xmon need it
+ */
+ if (_machine == _MACH_Pmac)
+ pmac_feature_init(); /* New cool way */
+#endif
+
+#ifdef CONFIG_XMON
+ xmon_map_scc();
+ if (strstr(cmd_line, "xmon"))
+ xmon(NULL);
+#endif /* CONFIG_XMON */
+ if ( ppc_md.progress ) ppc_md.progress("setup_arch: enter", 0x3eab);
+
+#if defined(CONFIG_KGDB)
+ if (ppc_md.kgdb_map_scc)
+ ppc_md.kgdb_map_scc();
+ set_debug_traps();
+ if (strstr(cmd_line, "gdb")) {
+ if (ppc_md.progress)
+ ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000);
+ printk("kgdb breakpoint activated\n");
+ breakpoint();
+ }
+#endif
+
+ /*
+ * Set cache line size based on type of cpu as a default.
+ * Systems with OF can look in the properties on the cpu node(s)
+ * for a possibly more accurate value.
+ */
+ if (cpu_has_feature(CPU_FTR_SPLIT_ID_CACHE)) {
+ dcache_bsize = cur_cpu_spec[0]->dcache_bsize;
+ icache_bsize = cur_cpu_spec[0]->icache_bsize;
+ ucache_bsize = 0;
+ } else
+ ucache_bsize = dcache_bsize = icache_bsize
+ = cur_cpu_spec[0]->dcache_bsize;
+
+ /* reboot on panic */
+ panic_timeout = 180;
+
+ init_mm.start_code = PAGE_OFFSET;
+ init_mm.end_code = (unsigned long) _etext;
+ init_mm.end_data = (unsigned long) _edata;
+ init_mm.brk = (unsigned long) klimit;
+
+ /* Save unparsed command line copy for /proc/cmdline */
+ strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
+ *cmdline_p = cmd_line;
+
+ /* set up the bootmem stuff with available memory */
+ do_init_bootmem();
+ if ( ppc_md.progress ) ppc_md.progress("setup_arch: bootmem", 0x3eab);
+
+#ifdef CONFIG_PPC_OCP
+ /* Initialize OCP device list */
+ ocp_early_init();
+ if ( ppc_md.progress ) ppc_md.progress("ocp: exit", 0x3eab);
+#endif
+
+#ifdef CONFIG_DUMMY_CONSOLE
+ conswitchp = &dummy_con;
+#endif
+
+ ppc_md.setup_arch();
+ if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab);
+
+ paging_init();
+
+ /* this is for modules since _machine can be a define -- Cort */
+ ppc_md.ppc_machine = _machine;
+}