4 * BRIEF MODULE DESCRIPTION
5 * Momentum Computer Ocelot (CP7000) - board dependent boot routines
7 * Copyright (C) 1996, 1997, 2001, 06 Ralf Baechle (ralf@linux-mips.org)
8 * Copyright (C) 2000 RidgeRun, Inc.
9 * Copyright (C) 2001 Red Hat, Inc.
10 * Copyright (C) 2002 Momentum Computer
12 * Author: RidgeRun, Inc.
13 * glonnon@ridgerun.com, skranz@ridgerun.com, stevej@ridgerun.com
15 * Copyright 2001 MontaVista Software Inc.
16 * Author: jsun@mvista.com or jsun@junsun.net
18 * This program is free software; you can redistribute it and/or modify it
19 * under the terms of the GNU General Public License as published by the
20 * Free Software Foundation; either version 2 of the License, or (at your
21 * option) any later version.
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
26 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
29 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
30 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 * You should have received a copy of the GNU General Public License along
35 * with this program; if not, write to the Free Software Foundation, Inc.,
36 * 675 Mass Ave, Cambridge, MA 02139, USA.
39 #include <linux/init.h>
40 #include <linux/kernel.h>
41 #include <linux/types.h>
43 #include <linux/swap.h>
44 #include <linux/ioport.h>
45 #include <linux/sched.h>
46 #include <linux/interrupt.h>
47 #include <linux/pci.h>
48 #include <linux/timex.h>
49 #include <linux/vmalloc.h>
53 #include <asm/bootinfo.h>
58 #include <asm/processor.h>
59 #include <asm/ptrace.h>
60 #include <asm/reboot.h>
61 #include <asm/traps.h>
62 #include <linux/bootmem.h>
63 #include <linux/initrd.h>
64 #include <asm/gt64120.h>
65 #include "ocelot_pld.h"
67 unsigned long gt64120_base = KSEG1ADDR(GT_DEF_BASE);
69 /* These functions are used for rebooting or halting the machine*/
70 extern void momenco_ocelot_restart(char *command);
71 extern void momenco_ocelot_halt(void);
72 extern void momenco_ocelot_power_off(void);
74 extern void gt64120_time_init(void);
75 extern void momenco_ocelot_irq_setup(void);
77 static char reset_reason;
79 #define ENTRYLO(x) ((pte_val(pfn_pte((x) >> PAGE_SHIFT, PAGE_KERNEL_UNCACHED)) >> 6)|1)
81 static void __init setup_l3cache(unsigned long size);
83 /* setup code for a handoff from a version 1 PMON 2000 PROM */
86 /* A wired TLB entry for the GT64120A and the serial port. The
87 GT64120A is going to be hit on every IRQ anyway - there's
88 absolutely no point in letting it be a random TLB entry, as
89 it'll just cause needless churning of the TLB. And we use
90 the other half for the serial port, which is just a PITA
93 Device Physical Virtual
94 GT64120 Internal Regs 0x24000000 0xe0000000
95 UARTs (CS2) 0x2d000000 0xe0001000
97 add_wired_entry(ENTRYLO(0x24000000), ENTRYLO(0x2D000000), 0xe0000000, PM_4K);
99 /* Also a temporary entry to let us talk to the Ocelot PLD and NVRAM
100 in the CS[012] region. We can't use ioremap() yet. The NVRAM
101 is a ST M48T37Y, which includes NVRAM, RTC, and Watchdog functions.
103 Ocelot PLD (CS0) 0x2c000000 0xe0020000
104 NVRAM 0x2c800000 0xe0030000
107 add_temporary_entry(ENTRYLO(0x2C000000), ENTRYLO(0x2d000000), 0xe0020000, PM_64K);
109 /* Relocate the CS3/BootCS region */
110 GT_WRITE(GT_CS3BOOTLD_OFS, 0x2f000000 >> 21);
112 /* Relocate CS[012] */
113 GT_WRITE(GT_CS20LD_OFS, 0x2c000000 >> 21);
115 /* Relocate the GT64120A itself... */
116 GT_WRITE(GT_ISD_OFS, 0x24000000 >> 21);
118 gt64120_base = 0xe0000000;
120 /* ...and the PCI0 view of it. */
121 GT_WRITE(GT_PCI0_CFGADDR_OFS, 0x80000020);
122 GT_WRITE(GT_PCI0_CFGDATA_OFS, 0x24000000);
123 GT_WRITE(GT_PCI0_CFGADDR_OFS, 0x80000024);
124 GT_WRITE(GT_PCI0_CFGDATA_OFS, 0x24000001);
127 /* setup code for a handoff from a version 2 PMON 2000 PROM */
130 /* A wired TLB entry for the GT64120A and the serial port. The
131 GT64120A is going to be hit on every IRQ anyway - there's
132 absolutely no point in letting it be a random TLB entry, as
133 it'll just cause needless churning of the TLB. And we use
134 the other half for the serial port, which is just a PITA
137 Device Physical Virtual
138 GT64120 Internal Regs 0xf4000000 0xe0000000
139 UARTs (CS2) 0xfd000000 0xe0001000
141 add_wired_entry(ENTRYLO(0xf4000000), ENTRYLO(0xfD000000), 0xe0000000, PM_4K);
143 /* Also a temporary entry to let us talk to the Ocelot PLD and NVRAM
144 in the CS[012] region. We can't use ioremap() yet. The NVRAM
145 is a ST M48T37Y, which includes NVRAM, RTC, and Watchdog functions.
147 Ocelot PLD (CS0) 0xfc000000 0xe0020000
148 NVRAM 0xfc800000 0xe0030000
150 add_temporary_entry(ENTRYLO(0xfC000000), ENTRYLO(0xfd000000), 0xe0020000, PM_64K);
152 gt64120_base = 0xe0000000;
155 void __init plat_setup(void)
157 void (*l3func)(unsigned long)=KSEG1ADDR(&setup_l3cache);
158 unsigned int tmpword;
160 board_time_init = gt64120_time_init;
162 _machine_restart = momenco_ocelot_restart;
163 _machine_halt = momenco_ocelot_halt;
164 pm_power_off = momenco_ocelot_power_off;
167 * initrd_start = (ulong)ocelot_initrd_start;
168 * initrd_end = (ulong)ocelot_initrd_start + (ulong)ocelot_initrd_size;
169 * initrd_below_start_ok = 1;
172 /* do handoff reconfiguration */
173 if (gt64120_base == KSEG1ADDR(GT_DEF_BASE))
178 /* Turn off the Bit-Error LED */
179 OCELOT_PLD_WRITE(0x80, INTCLR);
181 /* Relocate all the PCI1 stuff, not that we use it */
182 GT_WRITE(GT_PCI1IOLD_OFS, 0x30000000 >> 21);
183 GT_WRITE(GT_PCI1M0LD_OFS, 0x32000000 >> 21);
184 GT_WRITE(GT_PCI1M1LD_OFS, 0x34000000 >> 21);
186 /* Relocate PCI0 I/O and Mem0 */
187 GT_WRITE(GT_PCI0IOLD_OFS, 0x20000000 >> 21);
188 GT_WRITE(GT_PCI0M0LD_OFS, 0x22000000 >> 21);
190 /* Relocate PCI0 Mem1 */
191 GT_WRITE(GT_PCI0M1LD_OFS, 0x36000000 >> 21);
193 /* For the initial programming, we assume 512MB configuration */
194 /* Relocate the CPU's view of the RAM... */
195 GT_WRITE(GT_SCS10LD_OFS, 0);
196 GT_WRITE(GT_SCS10HD_OFS, 0x0fe00000 >> 21);
197 GT_WRITE(GT_SCS32LD_OFS, 0x10000000 >> 21);
198 GT_WRITE(GT_SCS32HD_OFS, 0x0fe00000 >> 21);
200 GT_WRITE(GT_SCS1LD_OFS, 0xff);
201 GT_WRITE(GT_SCS1HD_OFS, 0x00);
202 GT_WRITE(GT_SCS0LD_OFS, 0);
203 GT_WRITE(GT_SCS0HD_OFS, 0xff);
204 GT_WRITE(GT_SCS3LD_OFS, 0xff);
205 GT_WRITE(GT_SCS3HD_OFS, 0x00);
206 GT_WRITE(GT_SCS2LD_OFS, 0);
207 GT_WRITE(GT_SCS2HD_OFS, 0xff);
209 /* ...and the PCI0 view of it. */
210 GT_WRITE(GT_PCI0_CFGADDR_OFS, 0x80000010);
211 GT_WRITE(GT_PCI0_CFGDATA_OFS, 0x00000000);
212 GT_WRITE(GT_PCI0_CFGADDR_OFS, 0x80000014);
213 GT_WRITE(GT_PCI0_CFGDATA_OFS, 0x10000000);
214 GT_WRITE(GT_PCI0_BS_SCS10_OFS, 0x0ffff000);
215 GT_WRITE(GT_PCI0_BS_SCS32_OFS, 0x0ffff000);
217 tmpword = OCELOT_PLD_READ(BOARDREV);
219 printk("Momenco Ocelot: Board Assembly Rev. %c\n", 'A'+tmpword);
221 printk("Momenco Ocelot: Board Assembly Revision #0x%x\n", tmpword);
223 tmpword = OCELOT_PLD_READ(PLD1_ID);
224 printk("PLD 1 ID: %d.%d\n", tmpword>>4, tmpword&15);
225 tmpword = OCELOT_PLD_READ(PLD2_ID);
226 printk("PLD 2 ID: %d.%d\n", tmpword>>4, tmpword&15);
227 tmpword = OCELOT_PLD_READ(RESET_STATUS);
228 printk("Reset reason: 0x%x\n", tmpword);
229 reset_reason = tmpword;
230 OCELOT_PLD_WRITE(0xff, RESET_STATUS);
232 tmpword = OCELOT_PLD_READ(BOARD_STATUS);
233 printk("Board Status register: 0x%02x\n", tmpword);
234 printk(" - User jumper: %s\n", (tmpword & 0x80)?"installed":"absent");
235 printk(" - Boot flash write jumper: %s\n", (tmpword&0x40)?"installed":"absent");
236 printk(" - Tulip PHY %s connected\n", (tmpword&0x10)?"is":"not");
237 printk(" - L3 Cache size: %d MiB\n", (1<<((tmpword&12) >> 2))&~1);
238 printk(" - SDRAM size: %d MiB\n", 1<<(6+(tmpword&3)));
241 l3func((1<<(((tmpword&12) >> 2)+20)));
246 /* Decoders are allready set -- just add the
247 * appropriate region */
248 add_memory_region( 0x40<<20, 0xC0<<20, BOOT_MEM_RAM);
249 add_memory_region(0x100<<20, 0x100<<20, BOOT_MEM_RAM);
252 /* 256MiB -- two banks of 128MiB */
253 GT_WRITE(GT_SCS10HD_OFS, 0x07e00000 >> 21);
254 GT_WRITE(GT_SCS32LD_OFS, 0x08000000 >> 21);
255 GT_WRITE(GT_SCS32HD_OFS, 0x0fe00000 >> 21);
257 GT_WRITE(GT_SCS0HD_OFS, 0x7f);
258 GT_WRITE(GT_SCS2LD_OFS, 0x80);
259 GT_WRITE(GT_SCS2HD_OFS, 0xff);
261 /* reconfigure the PCI0 interface view of memory */
262 GT_WRITE(GT_PCI0_CFGADDR_OFS, 0x80000014);
263 GT_WRITE(GT_PCI0_CFGDATA_OFS, 0x08000000);
264 GT_WRITE(GT_PCI0_BS_SCS10_OFS, 0x0ffff000);
265 GT_WRITE(GT_PCI0_BS_SCS32_OFS, 0x0ffff000);
267 add_memory_region(0x40<<20, 0x40<<20, BOOT_MEM_RAM);
268 add_memory_region(0x80<<20, 0x80<<20, BOOT_MEM_RAM);
271 /* 128MiB -- 64MiB per bank */
272 GT_WRITE(GT_SCS10HD_OFS, 0x03e00000 >> 21);
273 GT_WRITE(GT_SCS32LD_OFS, 0x04000000 >> 21);
274 GT_WRITE(GT_SCS32HD_OFS, 0x07e00000 >> 21);
276 GT_WRITE(GT_SCS0HD_OFS, 0x3f);
277 GT_WRITE(GT_SCS2LD_OFS, 0x40);
278 GT_WRITE(GT_SCS2HD_OFS, 0x7f);
280 /* reconfigure the PCI0 interface view of memory */
281 GT_WRITE(GT_PCI0_CFGADDR_OFS, 0x80000014);
282 GT_WRITE(GT_PCI0_CFGDATA_OFS, 0x04000000);
283 GT_WRITE(GT_PCI0_BS_SCS10_OFS, 0x03fff000);
284 GT_WRITE(GT_PCI0_BS_SCS32_OFS, 0x03fff000);
286 /* add the appropriate region */
287 add_memory_region(0x40<<20, 0x40<<20, BOOT_MEM_RAM);
291 GT_WRITE(GT_SCS10HD_OFS, 0x01e00000 >> 21);
292 GT_WRITE(GT_SCS32LD_OFS, 0x02000000 >> 21);
293 GT_WRITE(GT_SCS32HD_OFS, 0x03e00000 >> 21);
295 GT_WRITE(GT_SCS0HD_OFS, 0x1f);
296 GT_WRITE(GT_SCS2LD_OFS, 0x20);
297 GT_WRITE(GT_SCS2HD_OFS, 0x3f);
299 /* reconfigure the PCI0 interface view of memory */
300 GT_WRITE(GT_PCI0_CFGADDR_OFS, 0x80000014);
301 GT_WRITE(GT_PCI0_CFGDATA_OFS, 0x04000000);
302 GT_WRITE(GT_PCI0_BS_SCS10_OFS, 0x01fff000);
303 GT_WRITE(GT_PCI0_BS_SCS32_OFS, 0x01fff000);
308 /* Fix up the DiskOnChip mapping */
309 GT_WRITE(GT_DEV_B3_OFS, 0xfef73);
312 extern int rm7k_tcache_enabled;
314 * This runs in KSEG1. See the verbiage in rm7k.c::probe_scache()
316 #define Page_Invalidate_T 0x16
317 static void __init setup_l3cache(unsigned long size)
322 printk("Enabling L3 cache...");
324 /* Enable the L3 cache in the GT64120A's CPU Configuration register */
325 tmp = GT_READ(GT_CPU_OFS);
326 GT_WRITE(GT_CPU_OFS, tmp | (1<<14));
328 /* Enable the L3 cache in the CPU */
329 set_c0_config(1<<12 /* CONF_TE */);
331 /* Clear the cache */
335 for (i=0; i < size; i+= 4096) {
336 __asm__ __volatile__ (
343 : "r" (KSEG0ADDR(i)),
344 "i" (Page_Invalidate_T));
347 /* Let the RM7000 MM code know that the tertiary cache is enabled */
348 rm7k_tcache_enabled = 1;
354 /* This needs to be one of the first initcalls, because no I/O port access
355 can work before this */
357 static int io_base_ioremap(void)
359 void *io_remap_range = ioremap(GT_PCI_IO_BASE, GT_PCI_IO_SIZE);
361 if (!io_remap_range) {
362 panic("Could not ioremap I/O port range");
364 set_io_port_base(io_remap_range - GT_PCI_IO_BASE);
369 module_init(io_base_ioremap);