2 * Maple (970 eval board) setup code
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/init.h>
17 #include <linux/errno.h>
18 #include <linux/sched.h>
19 #include <linux/kernel.h>
20 #include <linux/export.h>
22 #include <linux/stddef.h>
23 #include <linux/unistd.h>
24 #include <linux/ptrace.h>
25 #include <linux/user.h>
26 #include <linux/tty.h>
27 #include <linux/string.h>
28 #include <linux/delay.h>
29 #include <linux/ioport.h>
30 #include <linux/major.h>
31 #include <linux/initrd.h>
32 #include <linux/vt_kern.h>
33 #include <linux/console.h>
34 #include <linux/pci.h>
35 #include <linux/adb.h>
36 #include <linux/cuda.h>
37 #include <linux/pmu.h>
38 #include <linux/irq.h>
39 #include <linux/seq_file.h>
40 #include <linux/root_dev.h>
41 #include <linux/serial.h>
42 #include <linux/smp.h>
43 #include <linux/bitops.h>
44 #include <linux/of_device.h>
45 #include <linux/memblock.h>
47 #include <asm/processor.h>
48 #include <asm/sections.h>
50 #include <asm/pgtable.h>
52 #include <asm/pci-bridge.h>
53 #include <asm/iommu.h>
54 #include <asm/machdep.h>
56 #include <asm/cputable.h>
61 #include <asm/nvram.h>
66 #define DBG(fmt...) udbg_printf(fmt)
71 static unsigned long maple_find_nvram_base(void)
73 struct device_node *rtcs;
74 unsigned long result = 0;
76 /* find NVRAM device */
77 rtcs = of_find_compatible_node(NULL, "nvram", "AMD8111");
80 if (of_address_to_resource(rtcs, 0, &r)) {
81 printk(KERN_EMERG "Maple: Unable to translate NVRAM"
85 if (!(r.flags & IORESOURCE_IO)) {
86 printk(KERN_EMERG "Maple: NVRAM address isn't PIO!\n");
91 printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
97 static void __noreturn maple_restart(char *cmd)
99 unsigned int maple_nvram_base;
100 const unsigned int *maple_nvram_offset, *maple_nvram_command;
101 struct device_node *sp;
103 maple_nvram_base = maple_find_nvram_base();
104 if (maple_nvram_base == 0)
107 /* find service processor device */
108 sp = of_find_node_by_name(NULL, "service-processor");
110 printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
113 maple_nvram_offset = of_get_property(sp, "restart-addr", NULL);
114 maple_nvram_command = of_get_property(sp, "restart-value", NULL);
118 outb_p(*maple_nvram_command, maple_nvram_base + *maple_nvram_offset);
121 printk(KERN_EMERG "Maple: Manual Restart Required\n");
125 static void __noreturn maple_power_off(void)
127 unsigned int maple_nvram_base;
128 const unsigned int *maple_nvram_offset, *maple_nvram_command;
129 struct device_node *sp;
131 maple_nvram_base = maple_find_nvram_base();
132 if (maple_nvram_base == 0)
135 /* find service processor device */
136 sp = of_find_node_by_name(NULL, "service-processor");
138 printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
141 maple_nvram_offset = of_get_property(sp, "power-off-addr", NULL);
142 maple_nvram_command = of_get_property(sp, "power-off-value", NULL);
146 outb_p(*maple_nvram_command, maple_nvram_base + *maple_nvram_offset);
149 printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
153 static void __noreturn maple_halt(void)
159 struct smp_ops_t maple_smp_ops = {
160 .probe = smp_mpic_probe,
161 .message_pass = smp_mpic_message_pass,
162 .kick_cpu = smp_generic_kick_cpu,
163 .setup_cpu = smp_mpic_setup_cpu,
164 .give_timebase = smp_generic_give_timebase,
165 .take_timebase = smp_generic_take_timebase,
167 #endif /* CONFIG_SMP */
169 static void __init maple_use_rtas_reboot_and_halt_if_present(void)
171 if (rtas_service_present("system-reboot") &&
172 rtas_service_present("power-off")) {
173 ppc_md.restart = rtas_restart;
174 pm_power_off = rtas_power_off;
175 ppc_md.halt = rtas_halt;
179 void __init maple_setup_arch(void)
181 /* init to some ~sane value until calibrate_delay() runs */
182 loops_per_jiffy = 50000000;
184 /* Setup SMP callback */
186 smp_ops = &maple_smp_ops;
188 /* Lookup PCI hosts */
191 #ifdef CONFIG_DUMMY_CONSOLE
192 conswitchp = &dummy_con;
194 maple_use_rtas_reboot_and_halt_if_present();
196 printk(KERN_DEBUG "Using native/NAP idle loop\n");
202 * Early initialization.
204 static void __init maple_init_early(void)
206 DBG(" -> maple_init_early\n");
208 iommu_init_early_dart(&maple_pci_controller_ops);
210 DBG(" <- maple_init_early\n");
214 * This is almost identical to pSeries and CHRP. We need to make that
215 * code generic at one point, with appropriate bits in the device-tree to
216 * identify the presence of an HT APIC
218 static void __init maple_init_IRQ(void)
220 struct device_node *root, *np, *mpic_node = NULL;
221 const unsigned int *opprop;
222 unsigned long openpic_addr = 0;
223 int naddr, n, i, opplen, has_isus = 0;
225 unsigned int flags = 0;
227 /* Locate MPIC in the device-tree. Note that there is a bug
228 * in Maple device-tree where the type of the controller is
229 * open-pic and not interrupt-controller
232 for_each_node_by_type(np, "interrupt-controller")
233 if (of_device_is_compatible(np, "open-pic")) {
237 if (mpic_node == NULL)
238 for_each_node_by_type(np, "open-pic") {
242 if (mpic_node == NULL) {
244 "Failed to locate the MPIC interrupt controller\n");
248 /* Find address list in /platform-open-pic */
249 root = of_find_node_by_path("/");
250 naddr = of_n_addr_cells(root);
251 opprop = of_get_property(root, "platform-open-pic", &opplen);
253 openpic_addr = of_read_number(opprop, naddr);
254 has_isus = (opplen > naddr);
255 printk(KERN_DEBUG "OpenPIC addr: %lx, has ISUs: %d\n",
256 openpic_addr, has_isus);
259 BUG_ON(openpic_addr == 0);
261 /* Check for a big endian MPIC */
262 if (of_get_property(np, "big-endian", NULL) != NULL)
263 flags |= MPIC_BIG_ENDIAN;
265 /* XXX Maple specific bits */
266 flags |= MPIC_U3_HT_IRQS;
267 /* All U3/U4 are big-endian, older SLOF firmware doesn't encode this */
268 flags |= MPIC_BIG_ENDIAN;
270 /* Setup the openpic driver. More device-tree junks, we hard code no
271 * ISUs for now. I'll have to revisit some stuffs with the folks doing
272 * the firmware for those
274 mpic = mpic_alloc(mpic_node, openpic_addr, flags,
275 /*has_isus ? 16 :*/ 0, 0, " MPIC ");
276 BUG_ON(mpic == NULL);
279 opplen /= sizeof(u32);
280 for (n = 0, i = naddr; i < opplen; i += naddr, n++) {
281 unsigned long isuaddr = of_read_number(opprop + i, naddr);
282 mpic_assign_isu(mpic, n, isuaddr);
285 /* All ISUs are setup, complete initialization */
287 ppc_md.get_irq = mpic_get_irq;
288 of_node_put(mpic_node);
292 static void __init maple_progress(char *s, unsigned short hex)
294 printk("*** %04x : %s\n", hex, s ? s : "");
299 * Called very early, MMU is off, device-tree isn't unflattened
301 static int __init maple_probe(void)
303 unsigned long root = of_get_flat_dt_root();
305 if (!of_flat_dt_is_compatible(root, "Momentum,Maple") &&
306 !of_flat_dt_is_compatible(root, "Momentum,Apache"))
310 pm_power_off = maple_power_off;
315 define_machine(maple) {
317 .probe = maple_probe,
318 .setup_arch = maple_setup_arch,
319 .init_early = maple_init_early,
320 .init_IRQ = maple_init_IRQ,
321 .pci_irq_fixup = maple_pci_irq_fixup,
322 .pci_get_legacy_ide_irq = maple_pci_get_legacy_ide_irq,
323 .restart = maple_restart,
325 .get_boot_time = maple_get_boot_time,
326 .set_rtc_time = maple_set_rtc_time,
327 .get_rtc_time = maple_get_rtc_time,
328 .calibrate_decr = generic_calibrate_decr,
329 .progress = maple_progress,
330 .power_save = power4_idle,
335 * Register a platform device for CPC925 memory controller on
336 * all boards with U3H (CPC925) bridge.
338 static int __init maple_cpc925_edac_setup(void)
340 struct platform_device *pdev;
341 struct device_node *np = NULL;
344 volatile void __iomem *mem;
347 np = of_find_node_by_type(NULL, "memory-controller");
349 printk(KERN_ERR "%s: Unable to find memory-controller node\n",
354 ret = of_address_to_resource(np, 0, &r);
358 printk(KERN_ERR "%s: Unable to get memory-controller reg\n",
363 mem = ioremap(r.start, resource_size(&r));
365 printk(KERN_ERR "%s: Unable to map memory-controller memory\n",
370 rev = __raw_readl(mem);
373 if (rev < 0x34 || rev > 0x3f) { /* U3H */
374 printk(KERN_ERR "%s: Non-CPC925(U3H) bridge revision: %02x\n",
379 pdev = platform_device_register_simple("cpc925_edac", 0, &r, 1);
381 return PTR_ERR(pdev);
383 printk(KERN_INFO "%s: CPC925 platform device created\n", __func__);
387 machine_device_initcall(maple, maple_cpc925_edac_setup);