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authorOlof Johansson <olof@lixom.net>2006-09-06 14:42:08 -0500
committerPaul Mackerras <paulus@samba.org>2006-09-13 18:39:53 +1000
commit1e76875e51266a5c43f601ecf08a92be5769228c (patch)
tree62867c80d57bd5fc335917dc0c2bcd26dfcc934b /arch/powerpc/platforms/pasemi/setup.c
parentb3ebd1d862d6c23caa58e40d341eefc426f835e1 (diff)
[POWERPC] powerpc: PA Semi PWRficient platform support
Base patch for PA6T and PA6T-1682M. This introduces the arch/powerpc/platform/pasemi directory, together with basic implementations for various setup. Much of this was based on other platform code, i.e. Maple, etc. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms/pasemi/setup.c')
-rw-r--r--arch/powerpc/platforms/pasemi/setup.c188
1 files changed, 188 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pasemi/setup.c b/arch/powerpc/platforms/pasemi/setup.c
new file mode 100644
index 00000000000..628482671c1
--- /dev/null
+++ b/arch/powerpc/platforms/pasemi/setup.c
@@ -0,0 +1,188 @@
+/*
+ * Copyright (C) 2006 PA Semi, Inc
+ *
+ * Authors: Kip Walker, PA Semi
+ * Olof Johansson, PA Semi
+ *
+ * Maintained by: Olof Johansson <olof@lixom.net>
+ *
+ * Based on arch/powerpc/platforms/maple/setup.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/console.h>
+
+#include <asm/prom.h>
+#include <asm/system.h>
+#include <asm/iommu.h>
+#include <asm/machdep.h>
+#include <asm/mpic.h>
+#include <asm/smp.h>
+#include <asm/time.h>
+
+#include "pasemi.h"
+
+static void pas_restart(char *cmd)
+{
+ printk("restart unimplemented, looping...\n");
+ for (;;) ;
+}
+
+static void pas_power_off(void)
+{
+ printk("power off unimplemented, looping...\n");
+ for (;;) ;
+}
+
+static void pas_halt(void)
+{
+ pas_power_off();
+}
+
+#ifdef CONFIG_SMP
+struct smp_ops_t pas_smp_ops = {
+ .probe = smp_mpic_probe,
+ .message_pass = smp_mpic_message_pass,
+ .kick_cpu = smp_generic_kick_cpu,
+ .setup_cpu = smp_mpic_setup_cpu,
+ .give_timebase = smp_generic_give_timebase,
+ .take_timebase = smp_generic_take_timebase,
+};
+#endif /* CONFIG_SMP */
+
+void __init pas_setup_arch(void)
+{
+#ifdef CONFIG_SMP
+ /* Setup SMP callback */
+ smp_ops = &pas_smp_ops;
+#endif
+ /* Lookup PCI hosts */
+ pas_pci_init();
+
+#ifdef CONFIG_DUMMY_CONSOLE
+ conswitchp = &dummy_con;
+#endif
+
+ printk(KERN_DEBUG "Using default idle loop\n");
+}
+
+static void iommu_dev_setup_null(struct pci_dev *dev) { }
+static void iommu_bus_setup_null(struct pci_bus *bus) { }
+
+static void __init pas_init_early(void)
+{
+ /* No iommu code yet */
+ ppc_md.iommu_dev_setup = iommu_dev_setup_null;
+ ppc_md.iommu_bus_setup = iommu_bus_setup_null;
+ pci_direct_iommu_init();
+}
+
+/* No legacy IO on our parts */
+static int pas_check_legacy_ioport(unsigned int baseport)
+{
+ return -ENODEV;
+}
+
+static __init void pas_init_IRQ(void)
+{
+ struct device_node *np;
+ struct device_node *root, *mpic_node;
+ unsigned long openpic_addr;
+ const unsigned int *opprop;
+ int naddr, opplen;
+ struct mpic *mpic;
+
+ mpic_node = NULL;
+
+ for_each_node_by_type(np, "interrupt-controller")
+ if (device_is_compatible(np, "open-pic")) {
+ mpic_node = np;
+ break;
+ }
+ if (!mpic_node)
+ for_each_node_by_type(np, "open-pic") {
+ mpic_node = np;
+ break;
+ }
+ if (!mpic_node) {
+ printk(KERN_ERR
+ "Failed to locate the MPIC interrupt controller\n");
+ return;
+ }
+
+ /* Find address list in /platform-open-pic */
+ root = of_find_node_by_path("/");
+ naddr = prom_n_addr_cells(root);
+ opprop = get_property(root, "platform-open-pic", &opplen);
+ if (!opprop) {
+ printk(KERN_ERR "No platform-open-pic property.\n");
+ of_node_put(root);
+ return;
+ }
+ openpic_addr = of_read_number(opprop, naddr);
+ printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
+ of_node_put(root);
+
+ mpic = mpic_alloc(mpic_node, openpic_addr, MPIC_PRIMARY, 0, 0,
+ " PAS-OPIC ");
+ BUG_ON(!mpic);
+
+ mpic_assign_isu(mpic, 0, openpic_addr + 0x10000);
+ mpic_init(mpic);
+ of_node_put(mpic_node);
+ of_node_put(root);
+}
+
+static void __init pas_progress(char *s, unsigned short hex)
+{
+ printk("[%04x] : %s\n", hex, s ? s : "");
+}
+
+
+/*
+ * Called very early, MMU is off, device-tree isn't unflattened
+ */
+static int __init pas_probe(void)
+{
+ unsigned long root = of_get_flat_dt_root();
+
+ if (!of_flat_dt_is_compatible(root, "PA6T-1682M"))
+ return 0;
+
+ hpte_init_native();
+
+ return 1;
+}
+
+define_machine(pas) {
+ .name = "PA Semi PA6T-1682M",
+ .probe = pas_probe,
+ .setup_arch = pas_setup_arch,
+ .init_early = pas_init_early,
+ .init_IRQ = pas_init_IRQ,
+ .get_irq = mpic_get_irq,
+ .pcibios_fixup = pas_pcibios_fixup,
+ .restart = pas_restart,
+ .power_off = pas_power_off,
+ .halt = pas_halt,
+ .get_boot_time = pas_get_boot_time,
+ .calibrate_decr = generic_calibrate_decr,
+ .check_legacy_ioport = pas_check_legacy_ioport,
+ .progress = pas_progress,
+};