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 * Added changes for SMP - Manish Lachwani (lachwani@pmc-sierra.com)
19 #include <linux/init.h>
21 #include <linux/sched.h>
22 #include <linux/bootmem.h>
23 #include <linux/mv643xx.h>
25 #include <asm/addrspace.h>
26 #include <asm/bootinfo.h>
29 #include "jaguar_atx_fpga.h"
31 extern void ja_setup_console(void);
33 struct callvectors *debug_vectors;
35 extern unsigned long cpu_clock;
37 const char *get_system_type(void)
39 return "Momentum Jaguar-ATX";
42 #ifdef CONFIG_MV643XX_ETH
43 extern unsigned char prom_mac_addr_base[6];
45 static void burn_clocks(void)
49 /* this loop should burn at least 1us -- this should be plenty */
50 for (i = 0; i < 0x10000; i++)
54 static u8 exchange_bit(u8 val, u8 cs)
57 JAGUAR_FPGA_WRITE((val << 2) | cs, EEPROM_MODE);
60 /* turn the clock on */
61 JAGUAR_FPGA_WRITE((val << 2) | cs | 0x2, EEPROM_MODE);
64 /* turn the clock off and read-strobe */
65 JAGUAR_FPGA_WRITE((val << 2) | cs | 0x10, EEPROM_MODE);
68 return ((JAGUAR_FPGA_READ(EEPROM_MODE) >> 3) & 0x1);
71 void get_mac(char dest[6])
73 u8 read_opcode[12] = {1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
76 for (i = 0; i < 12; i++)
77 exchange_bit(read_opcode[i], 1);
79 for (j = 0; j < 6; j++) {
81 for (i = 0; i < 8; i++) {
83 dest[j] |= exchange_bit(0, 1);
94 unsigned long signext(unsigned long addr)
97 return (unsigned long)((int)addr);
100 void *get_arg(unsigned long args, int arc)
103 unsigned char *puc, uc;
106 ul = (unsigned long)signext(args);
107 puc = (unsigned char *)ul;
111 #ifdef CONFIG_CPU_LITTLE_ENDIAN
113 l = (unsigned long)uc;
115 ul |= (((unsigned long)uc) << 8);
117 ul |= (((unsigned long)uc) << 16);
119 ul |= (((unsigned long)uc) << 24);
122 ul = ((unsigned long)uc) << 24;
124 ul |= (((unsigned long)uc) << 16);
126 ul |= (((unsigned long)uc) << 8);
128 ul |= ((unsigned long)uc);
135 char *arg64(unsigned long addrin, int arg_index)
140 args = signext(addrin);
141 p = (char *)get_arg(args, arg_index);
145 #endif /* CONFIG_64BIT */
147 /* PMON passes arguments in C main() style */
148 void __init prom_init(void)
151 char **arg = (char **) fw_arg1;
152 char **env = (char **) fw_arg2;
153 struct callvectors *cv = (struct callvectors *) fw_arg3;
156 #ifdef CONFIG_SERIAL_8250_CONSOLE
157 // ja_setup_console(); /* The very first thing. */
163 printk("Mips64 Jaguar-ATX\n");
164 /* save the PROM vectors for debugging use */
165 debug_vectors = (struct callvectors *)signext((unsigned long)cv);
167 /* arg[0] is "g", the rest is boot parameters */
168 arcs_cmdline[0] = '\0';
170 for (i = 1; i < argc; i++) {
171 ptr = (char *)arg64((unsigned long)arg, i);
172 if ((strlen(arcs_cmdline) + strlen(ptr) + 1) >=
173 sizeof(arcs_cmdline))
175 strcat(arcs_cmdline, ptr);
176 strcat(arcs_cmdline, " ");
181 ptr = (char *)arg64((unsigned long)env, i);
185 if (strncmp("gtbase", ptr, strlen("gtbase")) == 0) {
186 marvell_base = simple_strtol(ptr + strlen("gtbase="),
189 if ((marvell_base & 0xffffffff00000000) == 0)
190 marvell_base |= 0xffffffff00000000;
192 printk("marvell_base set to 0x%016lx\n", marvell_base);
194 if (strncmp("cpuclock", ptr, strlen("cpuclock")) == 0) {
195 cpu_clock = simple_strtol(ptr + strlen("cpuclock="),
197 printk("cpu_clock set to %d\n", cpu_clock);
201 printk("arcs_cmdline: %s\n", arcs_cmdline);
203 #else /* CONFIG_64BIT */
204 /* save the PROM vectors for debugging use */
207 /* arg[0] is "g", the rest is boot parameters */
208 arcs_cmdline[0] = '\0';
209 for (i = 1; i < argc; i++) {
210 if (strlen(arcs_cmdline) + strlen(arg[i] + 1)
211 >= sizeof(arcs_cmdline))
213 strcat(arcs_cmdline, arg[i]);
214 strcat(arcs_cmdline, " ");
218 if (strncmp("gtbase", *env, strlen("gtbase")) == 0) {
219 marvell_base = simple_strtol(*env + strlen("gtbase="),
222 if (strncmp("cpuclock", *env, strlen("cpuclock")) == 0) {
223 cpu_clock = simple_strtol(*env + strlen("cpuclock="),
228 #endif /* CONFIG_64BIT */
229 mips_machgroup = MACH_GROUP_MOMENCO;
230 mips_machtype = MACH_MOMENCO_JAGUAR_ATX;
232 #ifdef CONFIG_MV643XX_ETH
233 /* get the base MAC address for on-board ethernet ports */
234 get_mac(prom_mac_addr_base);
238 unsigned long __init prom_free_prom_memory(void)
243 void __init prom_fixup_mem_map(unsigned long start, unsigned long end)
247 int prom_boot_secondary(int cpu, unsigned long sp, unsigned long gp)
249 /* Clear the semaphore */
250 *(volatile uint32_t *)(0xbb000a68) = 0x80000000;
255 void prom_init_secondary(void)
257 clear_c0_config(CONF_CM_CMASK);
260 clear_c0_status(ST0_IM);
261 set_c0_status(0x1ffff);
264 void prom_smp_finish(void)