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 * Based on Ocelot Linux port, which is
9 * Copyright 2001 MontaVista Software Inc.
10 * Author: jsun@mvista.com or jsun@junsun.net
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
17 #include <linux/config.h>
18 #include <linux/init.h>
20 #include <linux/sched.h>
21 #include <linux/bootmem.h>
22 #include <linux/mv643xx.h>
24 #include <asm/addrspace.h>
25 #include <asm/bootinfo.h>
28 #include "ocelot_c_fpga.h"
30 struct callvectors* debug_vectors;
32 extern unsigned long marvell_base;
33 extern unsigned long cpu_clock;
35 #ifdef CONFIG_MV643XX_ETH
36 extern unsigned char prom_mac_addr_base[6];
39 const char *get_system_type(void)
41 #ifdef CONFIG_CPU_SR71000
42 return "Momentum Ocelot-CS";
44 return "Momentum Ocelot-C";
48 #ifdef CONFIG_MV643XX_ETH
49 static void burn_clocks(void)
53 /* this loop should burn at least 1us -- this should be plenty */
54 for (i = 0; i < 0x10000; i++)
58 static u8 exchange_bit(u8 val, u8 cs)
61 OCELOT_FPGA_WRITE((val << 2) | cs, EEPROM_MODE);
64 /* turn the clock on */
65 OCELOT_FPGA_WRITE((val << 2) | cs | 0x2, EEPROM_MODE);
68 /* turn the clock off and read-strobe */
69 OCELOT_FPGA_WRITE((val << 2) | cs | 0x10, EEPROM_MODE);
72 return ((OCELOT_FPGA_READ(EEPROM_MODE) >> 3) & 0x1);
75 void get_mac(char dest[6])
77 u8 read_opcode[12] = {1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
80 for (i = 0; i < 12; i++)
81 exchange_bit(read_opcode[i], 1);
83 for (j = 0; j < 6; j++) {
85 for (i = 0; i < 8; i++) {
87 dest[j] |= exchange_bit(0, 1);
99 unsigned long signext(unsigned long addr)
102 return (unsigned long)((int)addr);
105 void *get_arg(unsigned long args, int arc)
108 unsigned char *puc, uc;
111 ul = (unsigned long)signext(args);
112 puc = (unsigned char *)ul;
116 #ifdef CONFIG_CPU_LITTLE_ENDIAN
118 ul = (unsigned long)uc;
120 ul |= (((unsigned long)uc) << 8);
122 ul |= (((unsigned long)uc) << 16);
124 ul |= (((unsigned long)uc) << 24);
125 #else /* CONFIG_CPU_LITTLE_ENDIAN */
127 ul = ((unsigned long)uc) << 24;
129 ul |= (((unsigned long)uc) << 16);
131 ul |= (((unsigned long)uc) << 8);
133 ul |= ((unsigned long)uc);
134 #endif /* CONFIG_CPU_LITTLE_ENDIAN */
139 char *arg64(unsigned long addrin, int arg_index)
143 args = signext(addrin);
144 p = (char *)get_arg(args, arg_index);
147 #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;
161 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, " ");
178 ptr = (char *)arg64((unsigned long)env, i);
182 if (strncmp("gtbase", ptr, strlen("gtbase")) == 0) {
183 marvell_base = simple_strtol(ptr + strlen("gtbase="),
186 if ((marvell_base & 0xffffffff00000000) == 0)
187 marvell_base |= 0xffffffff00000000;
189 printk("marvell_base set to 0x%016lx\n", marvell_base);
191 if (strncmp("cpuclock", ptr, strlen("cpuclock")) == 0) {
192 cpu_clock = simple_strtol(ptr + strlen("cpuclock="),
194 printk("cpu_clock set to %d\n", cpu_clock);
198 printk("arcs_cmdline: %s\n", arcs_cmdline);
200 #else /* CONFIG_64BIT */
201 /* save the PROM vectors for debugging use */
204 /* arg[0] is "g", the rest is boot parameters */
205 arcs_cmdline[0] = '\0';
206 for (i = 1; i < argc; i++) {
207 if (strlen(arcs_cmdline) + strlen(arg[i] + 1)
208 >= sizeof(arcs_cmdline))
210 strcat(arcs_cmdline, arg[i]);
211 strcat(arcs_cmdline, " ");
215 if (strncmp("gtbase", *env, strlen("gtbase")) == 0) {
216 marvell_base = simple_strtol(*env + strlen("gtbase="),
219 if (strncmp("cpuclock", *env, strlen("cpuclock")) == 0) {
220 cpu_clock = simple_strtol(*env + strlen("cpuclock="),
225 #endif /* CONFIG_64BIT */
227 mips_machgroup = MACH_GROUP_MOMENCO;
228 mips_machtype = MACH_MOMENCO_OCELOT_C;
230 #ifdef CONFIG_MV643XX_ETH
231 /* get the base MAC address for on-board ethernet ports */
232 get_mac(prom_mac_addr_base);
236 debug_vectors->printf("Booting Linux kernel...\n");
240 unsigned long __init prom_free_prom_memory(void)