[PATCH] ppc64: add BPA platform type

This adds the basic support for running on BPA machines.
So far, this is only the IBM workstation, and it will
not run on others without a little more generalization.

It should be possible to configure a kernel for any
combination of CONFIG_PPC_BPA with any of the other
multiplatform targets.

Signed-off-by: Arnd Bergmann <arndb@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 135 insertions, 0 deletions

diff --git a/arch/ppc64/kernel/bpa_setup.c b/arch/ppc64/kernel/bpa_setup.c
new file mode 100644
index 000000000000..d1992dd2d61b
--- /dev/null
+++ b/arch/ppc64/kernel/bpa_setup.c
@@ -0,0 +1,135 @@
+/*
+ *  linux/arch/ppc/kernel/bpa_setup.c
+ *
+ *  Copyright (C) 1995  Linus Torvalds
+ *  Adapted from 'alpha' version by Gary Thomas
+ *  Modified by Cort Dougan (cort@cs.nmt.edu)
+ *  Modified by PPC64 Team, IBM Corp
+ *  Modified by BPA Team, IBM Deutschland Entwicklung GmbH
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#undef DEBUG
+
+#include <linux/config.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/stddef.h>
+#include <linux/unistd.h>
+#include <linux/slab.h>
+#include <linux/user.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/seq_file.h>
+#include <linux/root_dev.h>
+#include <linux/console.h>
+
+#include <asm/mmu.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/prom.h>
+#include <asm/rtas.h>
+#include <asm/pci-bridge.h>
+#include <asm/iommu.h>
+#include <asm/dma.h>
+#include <asm/machdep.h>
+#include <asm/time.h>
+#include <asm/nvram.h>
+#include <asm/cputable.h>
+
+#include "pci.h"
+
+#ifdef DEBUG
+#define DBG(fmt...) udbg_printf(fmt)
+#else
+#define DBG(fmt...)
+#endif
+
+void bpa_get_cpuinfo(struct seq_file *m)
+{
+        struct device_node *root;
+        const char *model = "";
+
+        root = of_find_node_by_path("/");
+        if (root)
+                model = get_property(root, "model", NULL);
+        seq_printf(m, "machine\t\t: BPA %s\n", model);
+        of_node_put(root);
+}
+
+static void bpa_progress(char *s, unsigned short hex)
+{
+        printk("*** %04x : %s\n", hex, s ? s : "");
+}
+
+static void __init bpa_setup_arch(void)
+{
+#ifdef CONFIG_SMP
+        smp_init_pSeries();
+#endif
+
+        /* init to some ~sane value until calibrate_delay() runs */
+        loops_per_jiffy = 50000000;
+
+        if (ROOT_DEV == 0) {
+                printk("No ramdisk, default root is /dev/hda2\n");
+                ROOT_DEV = Root_HDA2;
+        }
+
+        /* Find and initialize PCI host bridges */
+        init_pci_config_tokens();
+        find_and_init_phbs();
+
+#ifdef CONFIG_DUMMY_CONSOLE
+        conswitchp = &dummy_con;
+#endif
+
+        bpa_nvram_init();
+}
+
+/*
+ * Early initialization.  Relocation is on but do not reference unbolted pages
+ */
+static void __init bpa_init_early(void)
+{
+        DBG(" -> bpa_init_early()\n");
+
+        hpte_init_native();
+
+        pci_direct_iommu_init();
+
+        ppc64_interrupt_controller = IC_BPA_IIC;
+
+        DBG(" <- bpa_init_early()\n");
+}
+
+
+static int __init bpa_probe(int platform)
+{
+        if (platform != PLATFORM_BPA)
+                return 0;
+
+        return 1;
+}
+
+struct machdep_calls __initdata bpa_md = {
+        .probe                  = bpa_probe,
+        .setup_arch             = bpa_setup_arch,
+        .init_early             = bpa_init_early,
+        .get_cpuinfo            = bpa_get_cpuinfo,
+        .restart                = rtas_restart,
+        .power_off              = rtas_power_off,
+        .halt                   = rtas_halt,
+        .get_boot_time          = rtas_get_boot_time,
+        .get_rtc_time           = rtas_get_rtc_time,
+        .set_rtc_time           = rtas_set_rtc_time,
+        .calibrate_decr         = generic_calibrate_decr,
+        .progress               = bpa_progress,
+};