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!

1 files changed, 615 insertions, 0 deletions

diff --git a/arch/ppc/platforms/chrp_setup.c b/arch/ppc/platforms/chrp_setup.c
new file mode 100644
index 000000000000..f23c4f320760
--- /dev/null
+++ b/arch/ppc/platforms/chrp_setup.c
@@ -0,0 +1,615 @@
+/*
+ *  arch/ppc/platforms/setup.c
+ *
+ *  Copyright (C) 1995  Linus Torvalds
+ *  Adapted from 'alpha' version by Gary Thomas
+ *  Modified by Cort Dougan (cort@cs.nmt.edu)
+ */
+
+/*
+ * bootup setup stuff..
+ */
+
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/stddef.h>
+#include <linux/unistd.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/user.h>
+#include <linux/a.out.h>
+#include <linux/tty.h>
+#include <linux/major.h>
+#include <linux/interrupt.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/version.h>
+#include <linux/adb.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/ide.h>
+#include <linux/irq.h>
+#include <linux/console.h>
+#include <linux/seq_file.h>
+#include <linux/root_dev.h>
+#include <linux/initrd.h>
+#include <linux/module.h>
+
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/prom.h>
+#include <asm/gg2.h>
+#include <asm/pci-bridge.h>
+#include <asm/dma.h>
+#include <asm/machdep.h>
+#include <asm/irq.h>
+#include <asm/hydra.h>
+#include <asm/sections.h>
+#include <asm/time.h>
+#include <asm/btext.h>
+#include <asm/i8259.h>
+#include <asm/open_pic.h>
+#include <asm/xmon.h>
+
+unsigned long chrp_get_rtc_time(void);
+int chrp_set_rtc_time(unsigned long nowtime);
+void chrp_calibrate_decr(void);
+long chrp_time_init(void);
+
+void chrp_find_bridges(void);
+void chrp_event_scan(void);
+void rtas_display_progress(char *, unsigned short);
+void rtas_indicator_progress(char *, unsigned short);
+void btext_progress(char *, unsigned short);
+
+extern unsigned long pmac_find_end_of_memory(void);
+extern int of_show_percpuinfo(struct seq_file *, int);
+
+int _chrp_type;
+EXPORT_SYMBOL(_chrp_type);
+
+/*
+ * XXX this should be in xmon.h, but putting it there means xmon.h
+ * has to include <linux/interrupt.h> (to get irqreturn_t), which
+ * causes all sorts of problems.  -- paulus
+ */
+extern irqreturn_t xmon_irq(int, void *, struct pt_regs *);
+
+extern dev_t boot_dev;
+
+extern PTE *Hash, *Hash_end;
+extern unsigned long Hash_size, Hash_mask;
+extern int probingmem;
+extern unsigned long loops_per_jiffy;
+static int max_width;
+
+#ifdef CONFIG_SMP
+extern struct smp_ops_t chrp_smp_ops;
+#endif
+
+static const char *gg2_memtypes[4] = {
+	"FPM", "SDRAM", "EDO", "BEDO"
+};
+static const char *gg2_cachesizes[4] = {
+	"256 KB", "512 KB", "1 MB", "Reserved"
+};
+static const char *gg2_cachetypes[4] = {
+	"Asynchronous", "Reserved", "Flow-Through Synchronous",
+	"Pipelined Synchronous"
+};
+static const char *gg2_cachemodes[4] = {
+	"Disabled", "Write-Through", "Copy-Back", "Transparent Mode"
+};
+
+int __chrp
+chrp_show_cpuinfo(struct seq_file *m)
+{
+	int i, sdramen;
+	unsigned int t;
+	struct device_node *root;
+	const char *model = "";
+
+	root = find_path_device("/");
+	if (root)
+		model = get_property(root, "model", NULL);
+	seq_printf(m, "machine\t\t: CHRP %s\n", model);
+
+	/* longtrail (goldengate) stuff */
+	if (!strncmp(model, "IBM,LongTrail", 13)) {
+		/* VLSI VAS96011/12 `Golden Gate 2' */
+		/* Memory banks */
+		sdramen = (in_le32(gg2_pci_config_base + GG2_PCI_DRAM_CTRL)
+			   >>31) & 1;
+		for (i = 0; i < (sdramen ? 4 : 6); i++) {
+			t = in_le32(gg2_pci_config_base+
+						 GG2_PCI_DRAM_BANK0+
+						 i*4);
+			if (!(t & 1))
+				continue;
+			switch ((t>>8) & 0x1f) {
+			case 0x1f:
+				model = "4 MB";
+				break;
+			case 0x1e:
+				model = "8 MB";
+				break;
+			case 0x1c:
+				model = "16 MB";
+				break;
+			case 0x18:
+				model = "32 MB";
+				break;
+			case 0x10:
+				model = "64 MB";
+				break;
+			case 0x00:
+				model = "128 MB";
+				break;
+			default:
+				model = "Reserved";
+				break;
+			}
+			seq_printf(m, "memory bank %d\t: %s %s\n", i, model,
+				   gg2_memtypes[sdramen ? 1 : ((t>>1) & 3)]);
+		}
+		/* L2 cache */
+		t = in_le32(gg2_pci_config_base+GG2_PCI_CC_CTRL);
+		seq_printf(m, "board l2\t: %s %s (%s)\n",
+			   gg2_cachesizes[(t>>7) & 3],
+			   gg2_cachetypes[(t>>2) & 3],
+			   gg2_cachemodes[t & 3]);
+	}
+	return 0;
+}
+
+/*
+ *  Fixes for the National Semiconductor PC78308VUL SuperI/O
+ *
+ *  Some versions of Open Firmware incorrectly initialize the IRQ settings
+ *  for keyboard and mouse
+ */
+static inline void __init sio_write(u8 val, u8 index)
+{
+	outb(index, 0x15c);
+	outb(val, 0x15d);
+}
+
+static inline u8 __init sio_read(u8 index)
+{
+	outb(index, 0x15c);
+	return inb(0x15d);
+}
+
+static void __init sio_fixup_irq(const char *name, u8 device, u8 level,
+				     u8 type)
+{
+	u8 level0, type0, active;
+
+	/* select logical device */
+	sio_write(device, 0x07);
+	active = sio_read(0x30);
+	level0 = sio_read(0x70);
+	type0 = sio_read(0x71);
+	if (level0 != level || type0 != type || !active) {
+		printk(KERN_WARNING "sio: %s irq level %d, type %d, %sactive: "
+		       "remapping to level %d, type %d, active\n",
+		       name, level0, type0, !active ? "in" : "", level, type);
+		sio_write(0x01, 0x30);
+		sio_write(level, 0x70);
+		sio_write(type, 0x71);
+	}
+}
+
+static void __init sio_init(void)
+{
+	struct device_node *root;
+
+	if ((root = find_path_device("/")) &&
+	    !strncmp(get_property(root, "model", NULL), "IBM,LongTrail", 13)) {
+		/* logical device 0 (KBC/Keyboard) */
+		sio_fixup_irq("keyboard", 0, 1, 2);
+		/* select logical device 1 (KBC/Mouse) */
+		sio_fixup_irq("mouse", 1, 12, 2);
+	}
+}
+
+
+static void __init pegasos_set_l2cr(void)
+{
+	struct device_node *np;
+
+	/* On Pegasos, enable the l2 cache if needed, as the OF forgets it */
+	if (_chrp_type != _CHRP_Pegasos)
+		return;
+
+	/* Enable L2 cache if needed */
+	np = find_type_devices("cpu");
+	if (np != NULL) {
+		unsigned int *l2cr = (unsigned int *)
+			get_property (np, "l2cr", NULL);
+		if (l2cr == NULL) {
+			printk ("Pegasos l2cr : no cpu l2cr property found\n");
+			return;
+		}
+		if (!((*l2cr) & 0x80000000)) {
+			printk ("Pegasos l2cr : L2 cache was not active, "
+				"activating\n");
+			_set_L2CR(0);
+			_set_L2CR((*l2cr) | 0x80000000);
+		}
+	}
+}
+
+void __init chrp_setup_arch(void)
+{
+	struct device_node *device;
+
+	/* init to some ~sane value until calibrate_delay() runs */
+	loops_per_jiffy = 50000000/HZ;
+
+#ifdef CONFIG_BLK_DEV_INITRD
+	/* this is fine for chrp */
+	initrd_below_start_ok = 1;
+
+	if (initrd_start)
+		ROOT_DEV = Root_RAM0;
+	else
+#endif
+		ROOT_DEV = Root_SDA2; /* sda2 (sda1 is for the kernel) */
+
+	/* On pegasos, enable the L2 cache if not already done by OF */
+	pegasos_set_l2cr();
+
+	/* Lookup PCI host bridges */
+	chrp_find_bridges();
+
+#ifndef CONFIG_PPC64BRIDGE
+	/*
+	 *  Temporary fixes for PCI devices.
+	 *  -- Geert
+	 */
+	hydra_init();		/* Mac I/O */
+
+#endif /* CONFIG_PPC64BRIDGE */
+
+	/*
+	 *  Fix the Super I/O configuration
+	 */
+	sio_init();
+
+	/* Get the event scan rate for the rtas so we know how
+	 * often it expects a heartbeat. -- Cort
+	 */
+	if ( rtas_data ) {
+		struct property *p;
+		device = find_devices("rtas");
+		for ( p = device->properties;
+		      p && strncmp(p->name, "rtas-event-scan-rate", 20);
+		      p = p->next )
+			/* nothing */ ;
+		if ( p && *(unsigned long *)p->value ) {
+			ppc_md.heartbeat = chrp_event_scan;
+			ppc_md.heartbeat_reset = (HZ/(*(unsigned long *)p->value)*30)-1;
+			ppc_md.heartbeat_count = 1;
+			printk("RTAS Event Scan Rate: %lu (%lu jiffies)\n",
+			       *(unsigned long *)p->value, ppc_md.heartbeat_reset );
+		}
+	}
+
+	pci_create_OF_bus_map();
+}
+
+void __chrp
+chrp_event_scan(void)
+{
+	unsigned char log[1024];
+	unsigned long ret = 0;
+	/* XXX: we should loop until the hardware says no more error logs -- Cort */
+	call_rtas( "event-scan", 4, 1, &ret, 0xffffffff, 0,
+		   __pa(log), 1024 );
+	ppc_md.heartbeat_count = ppc_md.heartbeat_reset;
+}
+
+void __chrp
+chrp_restart(char *cmd)
+{
+	printk("RTAS system-reboot returned %d\n",
+	       call_rtas("system-reboot", 0, 1, NULL));
+	for (;;);
+}
+
+void __chrp
+chrp_power_off(void)
+{
+	/* allow power on only with power button press */
+	printk("RTAS power-off returned %d\n",
+	       call_rtas("power-off", 2, 1, NULL,0xffffffff,0xffffffff));
+	for (;;);
+}
+
+void __chrp
+chrp_halt(void)
+{
+	chrp_power_off();
+}
+
+u_int __chrp
+chrp_irq_canonicalize(u_int irq)
+{
+	if (irq == 2)
+		return 9;
+	return irq;
+}
+
+/*
+ * Finds the open-pic node and sets OpenPIC_Addr based on its reg property.
+ * Then checks if it has an interrupt-ranges property.  If it does then
+ * we have a distributed open-pic, so call openpic_set_sources to tell
+ * the openpic code where to find the interrupt source registers.
+ */
+static void __init chrp_find_openpic(void)
+{
+	struct device_node *np;
+	int len, i;
+	unsigned int *iranges;
+	void *isu;
+
+	np = find_type_devices("open-pic");
+	if (np == NULL || np->n_addrs == 0)
+		return;
+	printk(KERN_INFO "OpenPIC at %x (size %x)\n",
+	       np->addrs[0].address, np->addrs[0].size);
+	OpenPIC_Addr = ioremap(np->addrs[0].address, 0x40000);
+	if (OpenPIC_Addr == NULL) {
+		printk(KERN_ERR "Failed to map OpenPIC!\n");
+		return;
+	}
+
+	iranges = (unsigned int *) get_property(np, "interrupt-ranges", &len);
+	if (iranges == NULL || len < 2 * sizeof(unsigned int))
+		return;		/* not distributed */
+
+	/*
+	 * The first pair of cells in interrupt-ranges refers to the
+	 * IDU; subsequent pairs refer to the ISUs.
+	 */
+	len /= 2 * sizeof(unsigned int);
+	if (np->n_addrs < len) {
+		printk(KERN_ERR "Insufficient addresses for distributed"
+		       " OpenPIC (%d < %d)\n", np->n_addrs, len);
+		return;
+	}
+	if (iranges[1] != 0) {
+		printk(KERN_INFO "OpenPIC irqs %d..%d in IDU\n",
+		       iranges[0], iranges[0] + iranges[1] - 1);
+		openpic_set_sources(iranges[0], iranges[1], NULL);
+	}
+	for (i = 1; i < len; ++i) {
+		iranges += 2;
+		printk(KERN_INFO "OpenPIC irqs %d..%d in ISU at %x (%x)\n",
+		       iranges[0], iranges[0] + iranges[1] - 1,
+		       np->addrs[i].address, np->addrs[i].size);
+		isu = ioremap(np->addrs[i].address, np->addrs[i].size);
+		if (isu != NULL)
+			openpic_set_sources(iranges[0], iranges[1], isu);
+		else
+			printk(KERN_ERR "Failed to map OpenPIC ISU at %x!\n",
+			       np->addrs[i].address);
+	}
+}
+
+#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(XMON)
+static struct irqaction xmon_irqaction = {
+	.handler = xmon_irq,
+	.mask = CPU_MASK_NONE,
+	.name = "XMON break",
+};
+#endif
+
+void __init chrp_init_IRQ(void)
+{
+	struct device_node *np;
+	int i;
+	unsigned long chrp_int_ack = 0;
+	unsigned char init_senses[NR_IRQS - NUM_8259_INTERRUPTS];
+#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(XMON)
+	struct device_node *kbd;
+#endif
+
+	for (np = find_devices("pci"); np != NULL; np = np->next) {
+		unsigned int *addrp = (unsigned int *)
+			get_property(np, "8259-interrupt-acknowledge", NULL);
+
+		if (addrp == NULL)
+			continue;
+		chrp_int_ack = addrp[prom_n_addr_cells(np)-1];
+		break;
+	}
+	if (np == NULL)
+		printk(KERN_ERR "Cannot find PCI interrupt acknowledge address\n");
+
+	chrp_find_openpic();
+
+	if (OpenPIC_Addr) {
+		prom_get_irq_senses(init_senses, NUM_8259_INTERRUPTS, NR_IRQS);
+		OpenPIC_InitSenses = init_senses;
+		OpenPIC_NumInitSenses = NR_IRQS - NUM_8259_INTERRUPTS;
+
+		openpic_init(NUM_8259_INTERRUPTS);
+		/* We have a cascade on OpenPIC IRQ 0, Linux IRQ 16 */
+		openpic_hookup_cascade(NUM_8259_INTERRUPTS, "82c59 cascade",
+				       i8259_irq);
+
+	}
+	for (i = 0; i < NUM_8259_INTERRUPTS; i++)
+		irq_desc[i].handler = &i8259_pic;
+	i8259_init(chrp_int_ack);
+
+#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(XMON)
+	/* see if there is a keyboard in the device tree
+	   with a parent of type "adb" */
+	for (kbd = find_devices("keyboard"); kbd; kbd = kbd->next)
+		if (kbd->parent && kbd->parent->type
+		    && strcmp(kbd->parent->type, "adb") == 0)
+			break;
+	if (kbd)
+		setup_irq(HYDRA_INT_ADB_NMI, &xmon_irqaction);
+#endif
+}
+
+void __init
+chrp_init2(void)
+{
+#ifdef CONFIG_NVRAM
+// XX replace this in a more saner way
+//	pmac_nvram_init();
+#endif
+
+	request_region(0x20,0x20,"pic1");
+	request_region(0xa0,0x20,"pic2");
+	request_region(0x00,0x20,"dma1");
+	request_region(0x40,0x20,"timer");
+	request_region(0x80,0x10,"dma page reg");
+	request_region(0xc0,0x20,"dma2");
+
+	if (ppc_md.progress)
+		ppc_md.progress("  Have fun!    ", 0x7777);
+}
+
+void __init
+chrp_init(unsigned long r3, unsigned long r4, unsigned long r5,
+	  unsigned long r6, unsigned long r7)
+{
+	struct device_node *root = find_path_device ("/");
+	char *machine = NULL;
+
+#ifdef CONFIG_BLK_DEV_INITRD
+	/* take care of initrd if we have one */
+	if ( r6 )
+	{
+		initrd_start = r6 + KERNELBASE;
+		initrd_end = r6 + r7 + KERNELBASE;
+	}
+#endif /* CONFIG_BLK_DEV_INITRD */
+
+	ISA_DMA_THRESHOLD = ~0L;
+	DMA_MODE_READ = 0x44;
+	DMA_MODE_WRITE = 0x48;
+	isa_io_base = CHRP_ISA_IO_BASE;		/* default value */
+
+	if (root)
+		machine = get_property(root, "model", NULL);
+	if (machine && strncmp(machine, "Pegasos", 7) == 0) {
+		_chrp_type = _CHRP_Pegasos;
+	} else if (machine && strncmp(machine, "IBM", 3) == 0) {
+		_chrp_type = _CHRP_IBM;
+	} else if (machine && strncmp(machine, "MOT", 3) == 0) {
+		_chrp_type = _CHRP_Motorola;
+	} else {
+		/* Let's assume it is an IBM chrp if all else fails */
+		_chrp_type = _CHRP_IBM;
+	}
+
+	ppc_md.setup_arch     = chrp_setup_arch;
+	ppc_md.show_percpuinfo = of_show_percpuinfo;
+	ppc_md.show_cpuinfo   = chrp_show_cpuinfo;
+
+	ppc_md.irq_canonicalize = chrp_irq_canonicalize;
+	ppc_md.init_IRQ       = chrp_init_IRQ;
+	if (_chrp_type == _CHRP_Pegasos)
+		ppc_md.get_irq        = i8259_irq;
+	else
+		ppc_md.get_irq        = openpic_get_irq;
+
+	ppc_md.init           = chrp_init2;
+
+	ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
+
+	ppc_md.restart        = chrp_restart;
+	ppc_md.power_off      = chrp_power_off;
+	ppc_md.halt           = chrp_halt;
+
+	ppc_md.time_init      = chrp_time_init;
+	ppc_md.set_rtc_time   = chrp_set_rtc_time;
+	ppc_md.get_rtc_time   = chrp_get_rtc_time;
+	ppc_md.calibrate_decr = chrp_calibrate_decr;
+
+	ppc_md.find_end_of_memory = pmac_find_end_of_memory;
+
+	if (rtas_data) {
+		struct device_node *rtas;
+		unsigned int *p;
+
+		rtas = find_devices("rtas");
+		if (rtas != NULL) {
+			if (get_property(rtas, "display-character", NULL)) {
+				ppc_md.progress = rtas_display_progress;
+				p = (unsigned int *) get_property
+				       (rtas, "ibm,display-line-length", NULL);
+				if (p)
+					max_width = *p;
+			} else if (get_property(rtas, "set-indicator", NULL))
+				ppc_md.progress = rtas_indicator_progress;
+		}
+	}
+#ifdef CONFIG_BOOTX_TEXT
+	if (ppc_md.progress == NULL && boot_text_mapped)
+		ppc_md.progress = btext_progress;
+#endif
+
+#ifdef CONFIG_SMP
+	ppc_md.smp_ops = &chrp_smp_ops;
+#endif /* CONFIG_SMP */
+
+	/*
+	 * Print the banner, then scroll down so boot progress
+	 * can be printed.  -- Cort
+	 */
+	if (ppc_md.progress) ppc_md.progress("Linux/PPC "UTS_RELEASE"\n", 0x0);
+}
+
+void __chrp
+rtas_display_progress(char *s, unsigned short hex)
+{
+	int width;
+	char *os = s;
+
+	if ( call_rtas( "display-character", 1, 1, NULL, '\r' ) )
+		return;
+
+	width = max_width;
+	while ( *os )
+	{
+		if ( (*os == '\n') || (*os == '\r') )
+			width = max_width;
+		else
+			width--;
+		call_rtas( "display-character", 1, 1, NULL, *os++ );
+		/* if we overwrite the screen length */
+		if ( width == 0 )
+			while ( (*os != 0) && (*os != '\n') && (*os != '\r') )
+				os++;
+	}
+
+	/*while ( width-- > 0 )*/
+	call_rtas( "display-character", 1, 1, NULL, ' ' );
+}
+
+void __chrp
+rtas_indicator_progress(char *s, unsigned short hex)
+{
+	call_rtas("set-indicator", 3, 1, NULL, 6, 0, hex);
+}
+
+#ifdef CONFIG_BOOTX_TEXT
+void
+btext_progress(char *s, unsigned short hex)
+{
+	prom_print(s);
+	prom_print("\n");
+}
+#endif /* CONFIG_BOOTX_TEXT */