2 * arch/ppc64/kernel/maple_setup.c
4 * (c) Copyright 2004 Benjamin Herrenschmidt (benh@kernel.crashing.org),
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
16 #include <linux/config.h>
17 #include <linux/init.h>
18 #include <linux/errno.h>
19 #include <linux/sched.h>
20 #include <linux/kernel.h>
22 #include <linux/stddef.h>
23 #include <linux/unistd.h>
24 #include <linux/ptrace.h>
25 #include <linux/slab.h>
26 #include <linux/user.h>
27 #include <linux/a.out.h>
28 #include <linux/tty.h>
29 #include <linux/string.h>
30 #include <linux/delay.h>
31 #include <linux/ioport.h>
32 #include <linux/major.h>
33 #include <linux/initrd.h>
34 #include <linux/vt_kern.h>
35 #include <linux/console.h>
36 #include <linux/ide.h>
37 #include <linux/pci.h>
38 #include <linux/adb.h>
39 #include <linux/cuda.h>
40 #include <linux/pmu.h>
41 #include <linux/irq.h>
42 #include <linux/seq_file.h>
43 #include <linux/root_dev.h>
44 #include <linux/serial.h>
45 #include <linux/smp.h>
47 #include <asm/processor.h>
48 #include <asm/sections.h>
50 #include <asm/system.h>
51 #include <asm/pgtable.h>
52 #include <asm/bitops.h>
54 #include <asm/pci-bridge.h>
55 #include <asm/iommu.h>
56 #include <asm/machdep.h>
58 #include <asm/cputable.h>
60 #include <asm/of_device.h>
66 #define DBG(fmt...) udbg_printf(fmt)
71 extern int maple_set_rtc_time(struct rtc_time *tm);
72 extern void maple_get_rtc_time(struct rtc_time *tm);
73 extern void maple_get_boot_time(struct rtc_time *tm);
74 extern void maple_calibrate_decr(void);
75 extern void maple_pci_init(void);
76 extern void maple_pcibios_fixup(void);
77 extern int maple_pci_get_legacy_ide_irq(struct pci_dev *dev, int channel);
78 extern void generic_find_legacy_serial_ports(unsigned int *default_speed);
81 static void maple_restart(char *cmd)
85 static void maple_power_off(void)
89 static void maple_halt(void)
94 struct smp_ops_t maple_smp_ops = {
95 .probe = smp_mpic_probe,
96 .message_pass = smp_mpic_message_pass,
97 .kick_cpu = smp_generic_kick_cpu,
98 .setup_cpu = smp_mpic_setup_cpu,
99 .give_timebase = smp_generic_give_timebase,
100 .take_timebase = smp_generic_take_timebase,
102 #endif /* CONFIG_SMP */
104 void __init maple_setup_arch(void)
106 /* init to some ~sane value until calibrate_delay() runs */
107 loops_per_jiffy = 50000000;
109 /* Setup SMP callback */
111 smp_ops = &maple_smp_ops;
113 /* Setup the PCI DMA to "direct" by default. May be overriden
116 pci_dma_init_direct();
118 /* Lookup PCI hosts */
121 #ifdef CONFIG_DUMMY_CONSOLE
122 conswitchp = &dummy_con;
127 * Early initialization.
129 static void __init maple_init_early(void)
131 unsigned int default_speed;
133 DBG(" -> maple_init_early\n");
135 /* Initialize hash table, from now on, we can take hash faults
140 /* Find the serial port */
141 generic_find_legacy_serial_ports(&default_speed);
143 DBG("naca->serialPortAddr: %lx\n", (long)naca->serialPortAddr);
145 if (naca->serialPortAddr) {
147 /* Map the uart for udbg. */
148 comport = (void *)__ioremap(naca->serialPortAddr, 16, _PAGE_NO_CACHE);
149 udbg_init_uart(comport, default_speed);
151 ppc_md.udbg_putc = udbg_putc;
152 ppc_md.udbg_getc = udbg_getc;
153 ppc_md.udbg_getc_poll = udbg_getc_poll;
154 DBG("Hello World !\n");
157 /* Setup interrupt mapping options */
158 naca->interrupt_controller = IC_OPEN_PIC;
160 DBG(" <- maple_init_early\n");
164 static __init void maple_init_IRQ(void)
166 struct device_node *root;
167 unsigned int *opprop;
168 unsigned long opic_addr;
170 unsigned char senses[128];
173 DBG(" -> maple_init_IRQ\n");
175 /* XXX: Non standard, replace that with a proper openpic/mpic node
176 * in the device-tree. Find the Open PIC if present */
177 root = of_find_node_by_path("/");
178 opprop = (unsigned int *) get_property(root,
179 "platform-open-pic", NULL);
181 panic("OpenPIC not found !\n");
183 n = prom_n_addr_cells(root);
184 for (opic_addr = 0; n > 0; --n)
185 opic_addr = (opic_addr << 32) + *opprop++;
188 /* Obtain sense values from device-tree */
189 prom_get_irq_senses(senses, 0, 128);
191 mpic = mpic_alloc(opic_addr,
192 MPIC_PRIMARY | MPIC_BIG_ENDIAN |
193 MPIC_BROKEN_U3 | MPIC_WANTS_RESET,
194 0, 0, 128, 128, senses, 128, "U3-MPIC");
195 BUG_ON(mpic == NULL);
198 DBG(" <- maple_init_IRQ\n");
201 static void __init maple_progress(char *s, unsigned short hex)
203 printk("*** %04x : %s\n", hex, s ? s : "");
208 * Called very early, MMU is off, device-tree isn't unflattened
210 static int __init maple_probe(int platform)
212 if (platform != PLATFORM_MAPLE)
215 * On U3, the DART (iommu) must be allocated now since it
216 * has an impact on htab_initialize (due to the large page it
217 * occupies having to be broken up so the DART itself is not
218 * part of the cacheable linar mapping
220 alloc_u3_dart_table();
225 struct machdep_calls __initdata maple_md = {
226 .probe = maple_probe,
227 .setup_arch = maple_setup_arch,
228 .init_early = maple_init_early,
229 .init_IRQ = maple_init_IRQ,
230 .get_irq = mpic_get_irq,
231 .pcibios_fixup = maple_pcibios_fixup,
232 .pci_get_legacy_ide_irq = maple_pci_get_legacy_ide_irq,
233 .restart = maple_restart,
234 .power_off = maple_power_off,
236 .get_boot_time = maple_get_boot_time,
237 .set_rtc_time = maple_set_rtc_time,
238 .get_rtc_time = maple_get_rtc_time,
239 .calibrate_decr = maple_calibrate_decr,
240 .progress = maple_progress,