Linux-2.6.12-rc2v2.6.12-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, 264 insertions, 0 deletions

diff --git a/arch/ppc/syslib/m8260_setup.c b/arch/ppc/syslib/m8260_setup.c
new file mode 100644
index 000000000000..23ea3f694de2
--- /dev/null
+++ b/arch/ppc/syslib/m8260_setup.c
@@ -0,0 +1,264 @@
+/*
+ *  arch/ppc/syslib/m8260_setup.c
+ *
+ *  Copyright (C) 1995  Linus Torvalds
+ *  Adapted from 'alpha' version by Gary Thomas
+ *  Modified by Cort Dougan (cort@cs.nmt.edu)
+ *  Modified for MBX using prep/chrp/pmac functions by Dan (dmalek@jlc.net)
+ *  Further modified for generic 8xx and 8260 by Dan.
+ */
+
+#include <linux/config.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/stddef.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/initrd.h>
+#include <linux/root_dev.h>
+#include <linux/seq_file.h>
+#include <linux/irq.h>
+
+#include <asm/mmu.h>
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/mpc8260.h>
+#include <asm/immap_cpm2.h>
+#include <asm/machdep.h>
+#include <asm/bootinfo.h>
+#include <asm/time.h>
+
+#include "cpm2_pic.h"
+
+unsigned char __res[sizeof(bd_t)];
+
+extern void cpm2_reset(void);
+extern void m8260_find_bridges(void);
+extern void idma_pci9_init(void);
+
+/* Place-holder for board-specific init */
+void __attribute__ ((weak)) __init
+m82xx_board_setup(void)
+{
+}
+
+static void __init
+m8260_setup_arch(void)
+{
+        /* Print out Vendor and Machine info. */
+        printk(KERN_INFO "%s %s port\n", CPUINFO_VENDOR, CPUINFO_MACHINE);
+
+        /* Reset the Communication Processor Module. */
+        cpm2_reset();
+#ifdef CONFIG_8260_PCI9
+        /* Initialise IDMA for PCI erratum workaround */
+        idma_pci9_init();
+#endif
+#ifdef CONFIG_PCI_8260
+        m8260_find_bridges();
+#endif
+#ifdef CONFIG_BLK_DEV_INITRD
+        if (initrd_start)
+                ROOT_DEV = Root_RAM0;
+#endif
+        m82xx_board_setup();
+}
+
+/* The decrementer counts at the system (internal) clock frequency
+ * divided by four.
+ */
+static void __init
+m8260_calibrate_decr(void)
+{
+        bd_t *binfo = (bd_t *)__res;
+        int freq, divisor;
+
+        freq = binfo->bi_busfreq;
+        divisor = 4;
+        tb_ticks_per_jiffy = freq / HZ / divisor;
+        tb_to_us = mulhwu_scale_factor(freq / divisor, 1000000);
+}
+
+/* The 8260 has an internal 1-second timer update register that
+ * we should use for this purpose.
+ */
+static uint rtc_time;
+
+static int
+m8260_set_rtc_time(unsigned long time)
+{
+        rtc_time = time;
+
+        return(0);
+}
+
+static unsigned long
+m8260_get_rtc_time(void)
+{
+        /* Get time from the RTC.
+        */
+        return((unsigned long)rtc_time);
+}
+
+#ifndef BOOTROM_RESTART_ADDR
+#warning "Using default BOOTROM_RESTART_ADDR!"
+#define BOOTROM_RESTART_ADDR    0xff000104
+#endif
+
+static void
+m8260_restart(char *cmd)
+{
+        extern void m8260_gorom(bd_t *bi, uint addr);
+        uint    startaddr;
+
+        /* Most boot roms have a warmstart as the second instruction
+         * of the reset vector.  If that doesn't work for you, change this
+         * or the reboot program to send a proper address.
+         */
+        startaddr = BOOTROM_RESTART_ADDR;
+        if (cmd != NULL) {
+                if (!strncmp(cmd, "startaddr=", 10))
+                        startaddr = simple_strtoul(&cmd[10], NULL, 0);
+        }
+
+        m8260_gorom((void*)__pa(__res), startaddr);
+}
+
+static void
+m8260_halt(void)
+{
+        local_irq_disable();
+        while (1);
+}
+
+static void
+m8260_power_off(void)
+{
+        m8260_halt();
+}
+
+static int
+m8260_show_cpuinfo(struct seq_file *m)
+{
+        bd_t *bp = (bd_t *)__res;
+
+        seq_printf(m, "vendor\t\t: %s\n"
+                   "machine\t\t: %s\n"
+                   "\n"
+                   "mem size\t\t: 0x%08x\n"
+                   "console baud\t\t: %d\n"
+                   "\n"
+                   "core clock\t: %u MHz\n"
+                   "CPM  clock\t: %u MHz\n"
+                   "bus  clock\t: %u MHz\n",
+                   CPUINFO_VENDOR, CPUINFO_MACHINE, bp->bi_memsize,
+                   bp->bi_baudrate, bp->bi_intfreq / 1000000,
+                   bp->bi_cpmfreq / 1000000, bp->bi_busfreq / 1000000);
+        return 0;
+}
+
+/* Initialize the internal interrupt controller.  The number of
+ * interrupts supported can vary with the processor type, and the
+ * 8260 family can have up to 64.
+ * External interrupts can be either edge or level triggered, and
+ * need to be initialized by the appropriate driver.
+ */
+static void __init
+m8260_init_IRQ(void)
+{
+        cpm2_init_IRQ();
+
+        /* Initialize the default interrupt mapping priorities,
+         * in case the boot rom changed something on us.
+         */
+        cpm2_immr->im_intctl.ic_siprr = 0x05309770;
+}
+
+/*
+ * Same hack as 8xx
+ */
+static unsigned long __init
+m8260_find_end_of_memory(void)
+{
+        bd_t *binfo = (bd_t *)__res;
+
+        return binfo->bi_memsize;
+}
+
+/* Map the IMMR, plus anything else we can cover
+ * in that upper space according to the memory controller
+ * chip select mapping.  Grab another bunch of space
+ * below that for stuff we can't cover in the upper.
+ */
+static void __init
+m8260_map_io(void)
+{
+        uint addr;
+
+        /* Map IMMR region to a 256MB BAT */
+        addr = (cpm2_immr != NULL) ? (uint)cpm2_immr : CPM_MAP_ADDR;
+        io_block_mapping(addr, addr, 0x10000000, _PAGE_IO);
+
+        /* Map I/O region to a 256MB BAT */
+        io_block_mapping(IO_VIRT_ADDR, IO_PHYS_ADDR, 0x10000000, _PAGE_IO);
+}
+
+/* Place-holder for board-specific ppc_md hooking */
+void __attribute__ ((weak)) __init
+m82xx_board_init(void)
+{
+}
+
+/* Inputs:
+ *   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
+platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
+              unsigned long r6, unsigned long r7)
+{
+        parse_bootinfo(find_bootinfo());
+
+        if ( r3 )
+                memcpy( (void *)__res,(void *)(r3+KERNELBASE), sizeof(bd_t) );
+
+#ifdef CONFIG_BLK_DEV_INITRD
+        /* take care of initrd if we have one */
+        if ( r4 ) {
+                initrd_start = r4 + KERNELBASE;
+                initrd_end = r5 + KERNELBASE;
+        }
+#endif /* CONFIG_BLK_DEV_INITRD */
+        /* take care of cmd line */
+        if ( r6 ) {
+                *(char *)(r7+KERNELBASE) = 0;
+                strcpy(cmd_line, (char *)(r6+KERNELBASE));
+        }
+
+        ppc_md.setup_arch               = m8260_setup_arch;
+        ppc_md.show_cpuinfo             = m8260_show_cpuinfo;
+        ppc_md.init_IRQ                 = m8260_init_IRQ;
+        ppc_md.get_irq                  = cpm2_get_irq;
+
+        ppc_md.restart                  = m8260_restart;
+        ppc_md.power_off                = m8260_power_off;
+        ppc_md.halt                     = m8260_halt;
+
+        ppc_md.set_rtc_time             = m8260_set_rtc_time;
+        ppc_md.get_rtc_time             = m8260_get_rtc_time;
+        ppc_md.calibrate_decr           = m8260_calibrate_decr;
+
+        ppc_md.find_end_of_memory       = m8260_find_end_of_memory;
+        ppc_md.setup_io_mappings        = m8260_map_io;
+
+        /* Call back for board-specific settings and overrides. */
+        m82xx_board_init();
+}