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!
diff --git a/arch/ppc/syslib/m8260_setup.c b/arch/ppc/syslib/m8260_setup.c
new file mode 100644
index 0000000..23ea3f6
--- /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();
+}