/* * 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) || defined(CONFIG_MPC10X_BRIDGE)#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; /* 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_MULTIPLATFORMint _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_SYSRQunsigned long SYSRQ_KEY = 0x54;#endif /* CONFIG_MAGIC_SYSRQ */ #ifdef CONFIG_VGA_CONSOLEunsigned 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);} void machine_power_off(void){#ifdef CONFIG_NVRAM	nvram_sync();#endif	ppc_md.power_off();} void machine_halt(void){#ifdef CONFIG_NVRAM	nvram_sync();#endif	ppc_md.halt();} void (*pm_power_off)(void) = machine_power_off; #ifdef CONFIG_TAUextern 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;	} 	/* 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) == 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)); 	seq_printf(m, "bogomips\t: %lu.%02lu\n",		   lpj / (500000/HZ), (lpj / (5000/HZ)) % 100); #if defined(CONFIG_85xx) || defined(CONFIG_83xx) || defined(CONFIG_MPC10X_BRIDGE)	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 */__initunsigned longearly_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 __openfirmwareof_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 __initintuit_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 __initplatform_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_CONSOLEextern char *of_stdout_device; static int __init set_preferred_console(void){	struct device_node *prom_stdout;	char *name;	int offset = 0; 	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="))

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