patch-2.1.51 linux/arch/ppc/kernel/setup.c

• Lines: 174
• Date: Sat Aug 16 09:51:08 1997
• Orig file: v2.1.50/linux/arch/ppc/kernel/setup.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.50/linux/arch/ppc/kernel/setup.c linux/arch/ppc/kernel/setup.c
@@ -0,0 +1,173 @@
+/*
+ * $Id: setup.c,v 1.12 1997/08/13 03:06:17 cort Exp $
+ * Common prep/pmac boot and setup code.
+ */
+
+#include <linux/config.h>
+#include <linux/string.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <linux/reboot.h>
+
+#include <asm/cuda.h>
+#include <asm/residual.h>
+#include <asm/io.h>
+
+char saved_command_line[256];
+unsigned char aux_device_present;
+
+/* copy of the residual data */
+RESIDUAL res;
+int _machine;
+
+/*
+ * 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() )
+ */
+unsigned long identify_machine(unsigned long r3, unsigned long r4, unsigned long r5,
+			       unsigned long r6, unsigned long r7)
+{
+	extern unsigned long initrd_start, initrd_end;
+	extern char cmd_line[256];
+#ifdef CONFIG_PMAC /* cheat for now - perhaps a check for OF could tell us */
+	_machine = _MACH_Pmac;
+#endif /* CONFIG_PMAC */
+#ifdef CONFIG_PREP
+	if (!strncmp(res.VitalProductData.PrintableModel,"IBM",3))
+		_machine = _MACH_IBM;
+	else
+		_machine = _MACH_Motorola;
+#endif /* CONFIG_PREP */
+	
+	if ( _machine == _MACH_Pmac )
+	{
+		io_base = 0;
+	}
+	else if ( is_prep ) /* prep */
+	{
+		io_base = 0x80000000;
+		/* make a copy of residual data */
+		if ( r3 )
+			memcpy( (void *)&res,(void *)(r3+KERNELBASE), sizeof(RESIDUAL) );
+		/* take care of initrd if we have one */
+		if ( r4 )
+		{
+			initrd_start = r4 + KERNELBASE;
+			initrd_end = r5 + KERNELBASE;
+		}
+		/* take care of cmd line */
+		if ( r6 )
+		{
+			
+			*(char *)(r7+KERNELBASE) = 0;
+			strcpy(cmd_line, (char *)(r6+KERNELBASE));
+		}
+	}
+	else
+	{
+		printk("Unknown machine type in identify_machine!\n");
+	}
+	return 0;
+}
+
+/* cmd is ignored for now... */
+void machine_restart(char *cmd)
+{
+	struct cuda_request req;
+	unsigned long flags;
+	unsigned long i = 10000;
+
+	if ( _machine == _MACH_Pmac )
+	{
+		cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
+		for (;;)
+			cuda_poll();
+	}
+	else /* prep */
+	{
+		_disable_interrupts();
+		
+		/* set exception prefix high - to the prom */
+		save_flags( flags );
+		restore_flags( flags|MSR_IP );
+		
+		/* make sure bit 0 (reset) is a 0 */
+		outb( inb(0x92) & ~1L , 0x92 );
+		/* signal a reset to system control port A - soft reset */
+		outb( inb(0x92) | 1 , 0x92 );
+		
+		while ( i != 0 ) i++;
+		panic("restart failed\n");
+	}
+
+}
+
+void machine_power_off(void)
+{
+	struct cuda_request req;
+
+	if ( _machine == _MACH_Pmac )
+	{
+		cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
+		for (;;)
+			cuda_poll();
+	}
+	else /* prep */
+	{
+		machine_restart(NULL);
+	}
+}
+
+void machine_halt(void)
+{
+	if ( _machine == _MACH_Pmac )
+	{
+#if 0
+		prom_exit();		/* doesn't work because prom is trashed */
+#else
+		machine_power_off();	/* for now */
+#endif
+	}
+	else /* prep */
+		machine_restart(NULL);
+
+}
+
+
+__initfunc(unsigned long
+bios32_init(unsigned long memory_start, unsigned long memory_end))
+{
+	return memory_start;
+}
+
+/*
+ * Will merge more into here later  -- Cort
+ */
+int get_cpuinfo(char *buffer)
+{
+	extern int pmac_get_cpuinfo(char *);	
+	extern int prep_get_cpuinfo(char *);
+	
+	if ( _machine == _MACH_Pmac )
+		return pmac_get_cpuinfo(buffer);
+#ifdef CONFIG_PREP
+	else /* prep */
+		return prep_get_cpuinfo(buffer);
+#endif /* CONFIG_PREP */
+}
+
+__initfunc(void setup_arch(char **cmdline_p,
+	unsigned long * memory_start_p, unsigned long * memory_end_p))
+{
+	extern void pmac_setup_arch(char **, unsigned long *, unsigned long *);
+	extern void prep_setup_arch(char **, unsigned long *, unsigned long *);
+	
+	if ( _machine == _MACH_Pmac )
+		pmac_setup_arch(cmdline_p,memory_start_p,memory_end_p);
+#ifdef CONFIG_PREP
+	else /* prep */
+		prep_setup_arch(cmdline_p,memory_start_p,memory_end_p);
+#endif /* CONFIG_PREP */
+}
+
+