2 * Copyright 2002 Momentum Computer Inc.
3 * Author: Matthew Dharm <mdharm@momenco.com>
5 * Louis Hamilton, Red Hat, Inc.
6 * hamilton@redhat.com [MIPS64 modifications]
8 * Copyright 2004 PMC-Sierra
9 * Author: Manish Lachwani (lachwani@pmc-sierra.com)
11 * Based on Ocelot Linux port, which is
12 * Copyright 2001 MontaVista Software Inc.
13 * Author: jsun@mvista.com or jsun@junsun.net
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License as published by the
17 * Free Software Foundation; either version 2 of the License, or (at your
18 * option) any later version.
20 * Copyright (C) 2004 MontaVista Software Inc.
21 * Author: Manish Lachwani, mlachwani@mvista.com
24 #include <linux/config.h>
25 #include <linux/init.h>
26 #include <linux/bootmem.h>
27 #include <linux/mv643xx.h>
29 #include <asm/addrspace.h>
30 #include <asm/bootinfo.h>
32 #include "ocelot_3_fpga.h"
34 struct callvectors* debug_vectors;
35 extern unsigned long marvell_base;
36 extern unsigned long cpu_clock;
38 #ifdef CONFIG_MV643XX_ETH
39 extern unsigned char prom_mac_addr_base[6];
42 const char *get_system_type(void)
44 return "Momentum Ocelot-3";
47 #ifdef CONFIG_MV643XX_ETH
48 void burn_clocks(void)
52 /* this loop should burn at least 1us -- this should be plenty */
53 for (i = 0; i < 0x10000; i++)
57 u8 exchange_bit(u8 val, u8 cs)
60 OCELOT_FPGA_WRITE((val << 2) | cs, EEPROM_MODE);
63 /* turn the clock on */
64 OCELOT_FPGA_WRITE((val << 2) | cs | 0x2, EEPROM_MODE);
67 /* turn the clock off and read-strobe */
68 OCELOT_FPGA_WRITE((val << 2) | cs | 0x10, EEPROM_MODE);
71 return ((OCELOT_FPGA_READ(EEPROM_MODE) >> 3) & 0x1);
74 void get_mac(char dest[6])
76 u8 read_opcode[12] = {1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
79 for (i = 0; i < 12; i++)
80 exchange_bit(read_opcode[i], 1);
82 for (j = 0; j < 6; j++) {
84 for (i = 0; i < 8; i++) {
86 dest[j] |= exchange_bit(0, 1);
98 unsigned long signext(unsigned long addr)
101 return (unsigned long)((int)addr);
104 void *get_arg(unsigned long args, int arc)
107 unsigned char *puc, uc;
110 ul = (unsigned long)signext(args);
111 puc = (unsigned char *)ul;
115 #ifdef CONFIG_CPU_LITTLE_ENDIAN
117 ul = (unsigned long)uc;
119 ul |= (((unsigned long)uc) << 8);
121 ul |= (((unsigned long)uc) << 16);
123 ul |= (((unsigned long)uc) << 24);
124 #else /* CONFIG_CPU_LITTLE_ENDIAN */
126 ul = ((unsigned long)uc) << 24;
128 ul |= (((unsigned long)uc) << 16);
130 ul |= (((unsigned long)uc) << 8);
132 ul |= ((unsigned long)uc);
133 #endif /* CONFIG_CPU_LITTLE_ENDIAN */
138 char *arg64(unsigned long addrin, int arg_index)
143 args = signext(addrin);
144 p = (char *)get_arg(args, arg_index);
148 #endif /* CONFIG_64BIT */
150 void __init prom_init(void)
153 char **arg = (char **) fw_arg1;
154 char **env = (char **) fw_arg2;
155 struct callvectors *cv = (struct callvectors *) fw_arg3;
160 printk("prom_init - MIPS64\n");
162 /* save the PROM vectors for debugging use */
163 debug_vectors = (struct callvectors *)signext((unsigned long)cv);
165 /* arg[0] is "g", the rest is boot parameters */
166 arcs_cmdline[0] = '\0';
168 for (i = 1; i < argc; i++) {
169 ptr = (char *)arg64((unsigned long)arg, i);
170 if ((strlen(arcs_cmdline) + strlen(ptr) + 1) >=
171 sizeof(arcs_cmdline))
173 strcat(arcs_cmdline, ptr);
174 strcat(arcs_cmdline, " ");
179 ptr = (char *)arg64((unsigned long)env, i);
183 if (strncmp("gtbase", ptr, strlen("gtbase")) == 0) {
184 marvell_base = simple_strtol(ptr + strlen("gtbase="),
187 if ((marvell_base & 0xffffffff00000000) == 0)
188 marvell_base |= 0xffffffff00000000;
190 printk("marvell_base set to 0x%016lx\n", marvell_base);
192 if (strncmp("cpuclock", ptr, strlen("cpuclock")) == 0) {
193 cpu_clock = simple_strtol(ptr + strlen("cpuclock="),
195 printk("cpu_clock set to %d\n", cpu_clock);
199 printk("arcs_cmdline: %s\n", arcs_cmdline);
201 #else /* CONFIG_64BIT */
203 /* save the PROM vectors for debugging use */
206 /* arg[0] is "g", the rest is boot parameters */
207 arcs_cmdline[0] = '\0';
208 for (i = 1; i < argc; i++) {
209 if (strlen(arcs_cmdline) + strlen(arg[i] + 1)
210 >= sizeof(arcs_cmdline))
212 strcat(arcs_cmdline, arg[i]);
213 strcat(arcs_cmdline, " ");
217 if (strncmp("gtbase", *env, strlen("gtbase")) == 0) {
218 marvell_base = simple_strtol(*env + strlen("gtbase="),
221 if (strncmp("cpuclock", *env, strlen("cpuclock")) == 0) {
222 cpu_clock = simple_strtol(*env + strlen("cpuclock="),
227 #endif /* CONFIG_64BIT */
229 mips_machgroup = MACH_GROUP_MOMENCO;
230 mips_machtype = MACH_MOMENCO_OCELOT_3;
232 #ifdef CONFIG_MV643XX_ETH
233 /* get the base MAC address for on-board ethernet ports */
234 get_mac(prom_mac_addr_base);
238 debug_vectors->printf("Booting Linux kernel...\n");
242 unsigned long __init prom_free_prom_memory(void)
247 void __init prom_fixup_mem_map(unsigned long start, unsigned long end)