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, 321 insertions, 0 deletions

diff --git a/arch/ppc/syslib/ppc4xx_setup.c b/arch/ppc/syslib/ppc4xx_setup.c
new file mode 100644
index 000000000000..e170aebeb69b
--- /dev/null
+++ b/arch/ppc/syslib/ppc4xx_setup.c
@@ -0,0 +1,321 @@
+/*
+ *
+ *    Copyright (c) 1999-2000 Grant Erickson <grant@lcse.umn.edu>
+ *
+ *    Copyright 2000-2001 MontaVista Software Inc.
+ *      Completed implementation.
+ *      Author: MontaVista Software, Inc.  <source@mvista.com>
+ *              Frank Rowand <frank_rowand@mvista.com>
+ *              Debbie Chu   <debbie_chu@mvista.com>
+ *	Further modifications by Armin Kuster
+ *
+ *    Module name: ppc4xx_setup.c
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/threads.h>
+#include <linux/spinlock.h>
+#include <linux/irq.h>
+#include <linux/reboot.h>
+#include <linux/param.h>
+#include <linux/string.h>
+#include <linux/initrd.h>
+#include <linux/pci.h>
+#include <linux/rtc.h>
+#include <linux/console.h>
+#include <linux/ide.h>
+#include <linux/serial_reg.h>
+#include <linux/seq_file.h>
+
+#include <asm/system.h>
+#include <asm/processor.h>
+#include <asm/machdep.h>
+#include <asm/page.h>
+#include <asm/kgdb.h>
+#include <asm/ibm4xx.h>
+#include <asm/time.h>
+#include <asm/todc.h>
+#include <asm/ppc4xx_pic.h>
+#include <asm/pci-bridge.h>
+#include <asm/bootinfo.h>
+
+#include <syslib/gen550.h>
+
+/* Function Prototypes */
+extern void abort(void);
+extern void ppc4xx_find_bridges(void);
+
+extern void ppc4xx_wdt_heartbeat(void);
+extern int wdt_enable;
+extern unsigned long wdt_period;
+
+/* Global Variables */
+bd_t __res;
+
+void __init
+ppc4xx_setup_arch(void)
+{
+#if !defined(CONFIG_BDI_SWITCH)
+	/*
+	 * The Abatron BDI JTAG debugger does not tolerate others
+	 * mucking with the debug registers.
+	 */
+        mtspr(SPRN_DBCR0, (DBCR0_IDM));
+	mtspr(SPRN_DBSR, 0xffffffff);
+#endif
+
+	/* Setup PCI host bridges */
+#ifdef CONFIG_PCI
+	ppc4xx_find_bridges();
+#endif
+}
+
+/*
+ *   This routine pretty-prints the platform's internal CPU clock
+ *   frequencies into the buffer for usage in /proc/cpuinfo.
+ */
+
+static int
+ppc4xx_show_percpuinfo(struct seq_file *m, int i)
+{
+	seq_printf(m, "clock\t\t: %ldMHz\n", (long)__res.bi_intfreq / 1000000);
+
+	return 0;
+}
+
+/*
+ *   This routine pretty-prints the platform's internal bus clock
+ *   frequencies into the buffer for usage in /proc/cpuinfo.
+ */
+static int
+ppc4xx_show_cpuinfo(struct seq_file *m)
+{
+	bd_t *bip = &__res;
+
+	seq_printf(m, "machine\t\t: %s\n", PPC4xx_MACHINE_NAME);
+	seq_printf(m, "plb bus clock\t: %ldMHz\n",
+		   (long) bip->bi_busfreq / 1000000);
+#ifdef CONFIG_PCI
+	seq_printf(m, "pci bus clock\t: %dMHz\n",
+		   bip->bi_pci_busfreq / 1000000);
+#endif
+
+	return 0;
+}
+
+/*
+ * Return the virtual address representing the top of physical RAM.
+ */
+static unsigned long __init
+ppc4xx_find_end_of_memory(void)
+{
+	return ((unsigned long) __res.bi_memsize);
+}
+
+void __init
+ppc4xx_map_io(void)
+{
+	io_block_mapping(PPC4xx_ONB_IO_VADDR,
+			 PPC4xx_ONB_IO_PADDR, PPC4xx_ONB_IO_SIZE, _PAGE_IO);
+#ifdef CONFIG_PCI
+	io_block_mapping(PPC4xx_PCI_IO_VADDR,
+			 PPC4xx_PCI_IO_PADDR, PPC4xx_PCI_IO_SIZE, _PAGE_IO);
+	io_block_mapping(PPC4xx_PCI_CFG_VADDR,
+			 PPC4xx_PCI_CFG_PADDR, PPC4xx_PCI_CFG_SIZE, _PAGE_IO);
+	io_block_mapping(PPC4xx_PCI_LCFG_VADDR,
+			 PPC4xx_PCI_LCFG_PADDR, PPC4xx_PCI_LCFG_SIZE, _PAGE_IO);
+#endif
+}
+
+void __init
+ppc4xx_init_IRQ(void)
+{
+	ppc4xx_pic_init();
+}
+
+static void
+ppc4xx_restart(char *cmd)
+{
+	printk("%s\n", cmd);
+	abort();
+}
+
+static void
+ppc4xx_power_off(void)
+{
+	printk("System Halted\n");
+	local_irq_disable();
+	while (1) ;
+}
+
+static void
+ppc4xx_halt(void)
+{
+	printk("System Halted\n");
+	local_irq_disable();
+	while (1) ;
+}
+
+/*
+ * This routine retrieves the internal processor frequency from the board
+ * information structure, sets up the kernel timer decrementer based on
+ * that value, enables the 4xx programmable interval timer (PIT) and sets
+ * it up for auto-reload.
+ */
+static void __init
+ppc4xx_calibrate_decr(void)
+{
+	unsigned int freq;
+	bd_t *bip = &__res;
+
+#if defined(CONFIG_WALNUT) || defined(CONFIG_ASH) || defined(CONFIG_SYCAMORE)
+	/* Walnut boot rom sets DCR CHCR1 (aka CPC0_CR1) bit CETE to 1 */
+	mtdcr(DCRN_CHCR1, mfdcr(DCRN_CHCR1) & ~CHR1_CETE);
+#endif
+	freq = bip->bi_tbfreq;
+	tb_ticks_per_jiffy = freq / HZ;
+	tb_to_us = mulhwu_scale_factor(freq, 1000000);
+
+	/* Set the time base to zero.
+	   ** At 200 Mhz, time base will rollover in ~2925 years.
+	 */
+
+	mtspr(SPRN_TBWL, 0);
+	mtspr(SPRN_TBWU, 0);
+
+	/* Clear any pending timer interrupts */
+
+	mtspr(SPRN_TSR, TSR_ENW | TSR_WIS | TSR_PIS | TSR_FIS);
+	mtspr(SPRN_TCR, TCR_PIE | TCR_ARE);
+
+	/* Set the PIT reload value and just let it run. */
+	mtspr(SPRN_PIT, tb_ticks_per_jiffy);
+}
+
+/*
+ * IDE stuff.
+ * should be generic for every IDE PCI chipset
+ */
+#if defined(CONFIG_PCI) && defined(CONFIG_IDE)
+static void
+ppc4xx_ide_init_hwif_ports(hw_regs_t * hw, unsigned long data_port,
+			   unsigned long ctrl_port, int *irq)
+{
+	int i;
+
+	for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; ++i)
+		hw->io_ports[i] = data_port + i - IDE_DATA_OFFSET;
+
+	hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
+}
+#endif /* defined(CONFIG_PCI) && defined(CONFIG_IDE) */
+
+TODC_ALLOC();
+
+/*
+ * Input(s):
+ *   r3 - Optional pointer to a board information structure.
+ *   r4 - Optional pointer to the physical starting address of the init RAM
+ *        disk.
+ *   r5 - Optional pointer to the physical ending address of the init RAM
+ *        disk.
+ *   r6 - Optional pointer to the physical starting address of any kernel
+ *        command-line parameters.
+ *   r7 - Optional pointer to the physical ending address of any kernel
+ *        command-line parameters.
+ */
+void __init
+ppc4xx_init(unsigned long r3, unsigned long r4, unsigned long r5,
+	    unsigned long r6, unsigned long r7)
+{
+	parse_bootinfo(find_bootinfo());
+
+	/*
+	 * If we were passed in a board information, copy it into the
+	 * residual data area.
+	 */
+	if (r3)
+		__res = *(bd_t *)(r3 + KERNELBASE);
+
+#if defined(CONFIG_BLK_DEV_INITRD)
+	/*
+	 * If the init RAM disk has been configured in, and there's a valid
+	 * starting address for it, set it up.
+	 */
+	if (r4) {
+		initrd_start = r4 + KERNELBASE;
+		initrd_end = r5 + KERNELBASE;
+	}
+#endif				/* CONFIG_BLK_DEV_INITRD */
+
+	/* Copy the kernel command line arguments to a safe place. */
+
+	if (r6) {
+		*(char *) (r7 + KERNELBASE) = 0;
+		strcpy(cmd_line, (char *) (r6 + KERNELBASE));
+	}
+#if defined(CONFIG_PPC405_WDT)
+/* Look for wdt= option on command line */
+	if (strstr(cmd_line, "wdt=")) {
+		int valid_wdt = 0;
+		char *p, *q;
+		for (q = cmd_line; (p = strstr(q, "wdt=")) != 0;) {
+			q = p + 4;
+			if (p > cmd_line && p[-1] != ' ')
+				continue;
+			wdt_period = simple_strtoul(q, &q, 0);
+			valid_wdt = 1;
+			++q;
+		}
+		wdt_enable = valid_wdt;
+	}
+#endif
+
+	/* Initialize machine-dependent vectors */
+
+	ppc_md.setup_arch = ppc4xx_setup_arch;
+	ppc_md.show_percpuinfo = ppc4xx_show_percpuinfo;
+	ppc_md.show_cpuinfo = ppc4xx_show_cpuinfo;
+	ppc_md.init_IRQ = ppc4xx_init_IRQ;
+
+	ppc_md.restart = ppc4xx_restart;
+	ppc_md.power_off = ppc4xx_power_off;
+	ppc_md.halt = ppc4xx_halt;
+
+	ppc_md.calibrate_decr = ppc4xx_calibrate_decr;
+
+#ifdef CONFIG_PPC405_WDT
+	ppc_md.heartbeat = ppc4xx_wdt_heartbeat;
+#endif
+	ppc_md.heartbeat_count = 0;
+
+	ppc_md.find_end_of_memory = ppc4xx_find_end_of_memory;
+	ppc_md.setup_io_mappings = ppc4xx_map_io;
+
+#ifdef CONFIG_SERIAL_TEXT_DEBUG
+	ppc_md.progress = gen550_progress;
+#endif
+
+#if defined(CONFIG_PCI) && defined(CONFIG_IDE)
+	ppc_ide_md.ide_init_hwif = ppc4xx_ide_init_hwif_ports;
+#endif /* defined(CONFIG_PCI) && defined(CONFIG_IDE) */
+}
+
+/* Called from MachineCheckException */
+void platform_machine_check(struct pt_regs *regs)
+{
+#if defined(DCRN_PLB0_BEAR)
+	printk("PLB0: BEAR= 0x%08x ACR=   0x%08x BESR=  0x%08x\n",
+	    mfdcr(DCRN_PLB0_BEAR), mfdcr(DCRN_PLB0_ACR),
+	    mfdcr(DCRN_PLB0_BESR));
+#endif
+#if defined(DCRN_POB0_BEAR)
+	printk("PLB0 to OPB: BEAR= 0x%08x BESR0= 0x%08x BESR1= 0x%08x\n",
+	    mfdcr(DCRN_POB0_BEAR), mfdcr(DCRN_POB0_BESR0),
+	    mfdcr(DCRN_POB0_BESR1));
+#endif
+
+}