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>
23 #include <asm/addrspace.h>
24 #include <asm/bootinfo.h>
25 #include <asm/mv64340.h>
27 #include "jaguar_atx_fpga.h"
31 int (*open) (char*, int, int);
33 int (*read) (int, void*, int);
34 int (*write) (int, void*, int);
35 off_t (*lseek) (int, off_t, int);
36 int (*printf) (const char*, ...);
37 void (*cacheflush) (void);
38 char* (*gets) (char*);
41 struct callvectors* debug_vectors;
42 char arcs_cmdline[CL_SIZE];
44 extern unsigned long mv64340_base;
45 extern unsigned long cpu_clock;
47 #ifdef CONFIG_MV64340_ETH
48 extern unsigned char prom_mac_addr_base[6];
51 const char *get_system_type(void)
53 return "Momentum Jaguar-ATX";
56 #ifdef CONFIG_MV64340_ETH
57 static void burn_clocks(void)
61 /* this loop should burn at least 1us -- this should be plenty */
62 for (i = 0; i < 0x10000; i++)
66 static u8 exchange_bit(u8 val, u8 cs)
69 JAGUAR_FPGA_WRITE((val << 2) | cs, EEPROM_MODE);
72 /* turn the clock on */
73 JAGUAR_FPGA_WRITE((val << 2) | cs | 0x2, EEPROM_MODE);
76 /* turn the clock off and read-strobe */
77 JAGUAR_FPGA_WRITE((val << 2) | cs | 0x10, EEPROM_MODE);
80 return ((JAGUAR_FPGA_READ(EEPROM_MODE) >> 3) & 0x1);
83 void get_mac(char dest[6])
85 u8 read_opcode[12] = {1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
88 for (i = 0; i < 12; i++)
89 exchange_bit(read_opcode[i], 1);
91 for (j = 0; j < 6; j++) {
93 for (i = 0; i < 8; i++) {
95 dest[j] |= exchange_bit(0, 1);
107 unsigned long signext(unsigned long addr)
110 return (unsigned long)((int)addr);
113 void *get_arg(unsigned long args, int arc)
116 unsigned char *puc, uc;
119 ul = (unsigned long)signext(args);
120 puc = (unsigned char *)ul;
124 #ifdef CONFIG_CPU_LITTLE_ENDIAN
126 ul = (unsigned long)uc;
128 ul |= (((unsigned long)uc) << 8);
130 ul |= (((unsigned long)uc) << 16);
132 ul |= (((unsigned long)uc) << 24);
135 ul = ((unsigned long)uc) << 24;
137 ul |= (((unsigned long)uc) << 16);
139 ul |= (((unsigned long)uc) << 8);
141 ul |= ((unsigned long)uc);
147 char *arg64(unsigned long addrin, int arg_index)
151 args = signext(addrin);
152 p = (char *)get_arg(args, arg_index);
155 #endif /* CONFIG_MIPS64 */
157 /* PMON passes arguments in C main() style */
158 void __init prom_init(int argc, char **arg, char **env, struct callvectors *cv)
164 printk("Mips64 Jaguar-ATX\n");
165 /* save the PROM vectors for debugging use */
166 debug_vectors = (struct callvectors *)signext((unsigned long)cv);
168 /* arg[0] is "g", the rest is boot parameters */
169 arcs_cmdline[0] = '\0';
171 for (i = 1; i < argc; i++) {
172 ptr = (char *)arg64((unsigned long)arg, i);
173 if ((strlen(arcs_cmdline) + strlen(ptr) + 1) >=
174 sizeof(arcs_cmdline))
176 strcat(arcs_cmdline, ptr);
177 strcat(arcs_cmdline, " ");
182 ptr = (char *)arg64((unsigned long)env, i);
186 if (strncmp("gtbase", ptr, strlen("gtbase")) == 0) {
187 mv64340_base = simple_strtol(ptr + strlen("gtbase="),
190 if ((mv64340_base & 0xffffffff00000000) == 0)
191 mv64340_base |= 0xffffffff00000000;
193 printk("mv64340_base set to 0x%016lx\n", mv64340_base);
195 if (strncmp("cpuclock", ptr, strlen("cpuclock")) == 0) {
196 cpu_clock = simple_strtol(ptr + strlen("cpuclock="),
198 printk("cpu_clock set to %d\n", cpu_clock);
202 printk("arcs_cmdline: %s\n", arcs_cmdline);
204 #else /* CONFIG_MIPS64 */
205 /* save the PROM vectors for debugging use */
208 /* arg[0] is "g", the rest is boot parameters */
209 arcs_cmdline[0] = '\0';
210 for (i = 1; i < argc; i++) {
211 if (strlen(arcs_cmdline) + strlen(arg[i] + 1)
212 >= sizeof(arcs_cmdline))
214 strcat(arcs_cmdline, arg[i]);
215 strcat(arcs_cmdline, " ");
219 if (strncmp("gtbase", *env, strlen("gtbase")) == 0) {
220 mv64340_base = simple_strtol(*env + strlen("gtbase="),
223 if (strncmp("cpuclock", *env, strlen("cpuclock")) == 0) {
224 cpu_clock = simple_strtol(*env + strlen("cpuclock="),
229 #endif /* CONFIG_MIPS64 */
230 mips_machgroup = MACH_GROUP_MOMENCO;
231 mips_machtype = MACH_MOMENCO_JAGUAR_ATX;
233 #ifdef CONFIG_MV64340_ETH
234 /* get the base MAC address for on-board ethernet ports */
235 get_mac(prom_mac_addr_base);
238 #ifndef CONFIG_MIPS64
239 debug_vectors->printf("Booting Linux kernel...\n");
243 void __init prom_free_prom_memory(void)
247 void __init prom_fixup_mem_map(unsigned long start, unsigned long end)