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-rw-r--r--arch/mips/momentum/ocelot_3/prom.c248
1 files changed, 248 insertions, 0 deletions
diff --git a/arch/mips/momentum/ocelot_3/prom.c b/arch/mips/momentum/ocelot_3/prom.c
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+++ b/arch/mips/momentum/ocelot_3/prom.c
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+/*
+ * Copyright 2002 Momentum Computer Inc.
+ * Author: Matthew Dharm <mdharm@momenco.com>
+ *
+ * Louis Hamilton, Red Hat, Inc.
+ * hamilton@redhat.com [MIPS64 modifications]
+ *
+ * Copyright 2004 PMC-Sierra
+ * Author: Manish Lachwani (lachwani@pmc-sierra.com)
+ *
+ * Based on Ocelot Linux port, which is
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: jsun@mvista.com or jsun@junsun.net
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * Copyright (C) 2004 MontaVista Software Inc.
+ * Author: Manish Lachwani, mlachwani@mvista.com
+ *
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+#include <linux/mv643xx.h>
+
+#include <asm/addrspace.h>
+#include <asm/bootinfo.h>
+#include <asm/pmon.h>
+#include "ocelot_3_fpga.h"
+
+struct callvectors* debug_vectors;
+extern unsigned long marvell_base;
+extern unsigned long cpu_clock;
+
+#ifdef CONFIG_MV643XX_ETH
+extern unsigned char prom_mac_addr_base[6];
+#endif
+
+const char *get_system_type(void)
+{
+ return "Momentum Ocelot-3";
+}
+
+#ifdef CONFIG_MV643XX_ETH
+void burn_clocks(void)
+{
+ int i;
+
+ /* this loop should burn at least 1us -- this should be plenty */
+ for (i = 0; i < 0x10000; i++)
+ ;
+}
+
+u8 exchange_bit(u8 val, u8 cs)
+{
+ /* place the data */
+ OCELOT_FPGA_WRITE((val << 2) | cs, EEPROM_MODE);
+ burn_clocks();
+
+ /* turn the clock on */
+ OCELOT_FPGA_WRITE((val << 2) | cs | 0x2, EEPROM_MODE);
+ burn_clocks();
+
+ /* turn the clock off and read-strobe */
+ OCELOT_FPGA_WRITE((val << 2) | cs | 0x10, EEPROM_MODE);
+
+ /* return the data */
+ return ((OCELOT_FPGA_READ(EEPROM_MODE) >> 3) & 0x1);
+}
+
+void get_mac(char dest[6])
+{
+ u8 read_opcode[12] = {1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+ int i,j;
+
+ for (i = 0; i < 12; i++)
+ exchange_bit(read_opcode[i], 1);
+
+ for (j = 0; j < 6; j++) {
+ dest[j] = 0;
+ for (i = 0; i < 8; i++) {
+ dest[j] <<= 1;
+ dest[j] |= exchange_bit(0, 1);
+ }
+ }
+
+ /* turn off CS */
+ exchange_bit(0,0);
+}
+#endif
+
+
+#ifdef CONFIG_MIPS64
+
+unsigned long signext(unsigned long addr)
+{
+ addr &= 0xffffffff;
+ return (unsigned long)((int)addr);
+}
+
+void *get_arg(unsigned long args, int arc)
+{
+ unsigned long ul;
+ unsigned char *puc, uc;
+
+ args += (arc * 4);
+ ul = (unsigned long)signext(args);
+ puc = (unsigned char *)ul;
+ if (puc == 0)
+ return (void *)0;
+
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+ uc = *puc++;
+ ul = (unsigned long)uc;
+ uc = *puc++;
+ ul |= (((unsigned long)uc) << 8);
+ uc = *puc++;
+ ul |= (((unsigned long)uc) << 16);
+ uc = *puc++;
+ ul |= (((unsigned long)uc) << 24);
+#else /* CONFIG_CPU_LITTLE_ENDIAN */
+ uc = *puc++;
+ ul = ((unsigned long)uc) << 24;
+ uc = *puc++;
+ ul |= (((unsigned long)uc) << 16);
+ uc = *puc++;
+ ul |= (((unsigned long)uc) << 8);
+ uc = *puc++;
+ ul |= ((unsigned long)uc);
+#endif /* CONFIG_CPU_LITTLE_ENDIAN */
+ ul = signext(ul);
+ return (void *)ul;
+}
+
+char *arg64(unsigned long addrin, int arg_index)
+{
+ unsigned long args;
+ char *p;
+
+ args = signext(addrin);
+ p = (char *)get_arg(args, arg_index);
+
+ return p;
+}
+#endif /* CONFIG_MIPS64 */
+
+void __init prom_init(void)
+{
+ int argc = fw_arg0;
+ char **arg = (char **) fw_arg1;
+ char **env = (char **) fw_arg2;
+ struct callvectors *cv = (struct callvectors *) fw_arg3;
+ int i;
+
+#ifdef CONFIG_MIPS64
+ char *ptr;
+ printk("prom_init - MIPS64\n");
+
+ /* save the PROM vectors for debugging use */
+ debug_vectors = (struct callvectors *)signext((unsigned long)cv);
+
+ /* arg[0] is "g", the rest is boot parameters */
+ arcs_cmdline[0] = '\0';
+
+ for (i = 1; i < argc; i++) {
+ ptr = (char *)arg64((unsigned long)arg, i);
+ if ((strlen(arcs_cmdline) + strlen(ptr) + 1) >=
+ sizeof(arcs_cmdline))
+ break;
+ strcat(arcs_cmdline, ptr);
+ strcat(arcs_cmdline, " ");
+ }
+ i = 0;
+
+ while (1) {
+ ptr = (char *)arg64((unsigned long)env, i);
+ if (! ptr)
+ break;
+
+ if (strncmp("gtbase", ptr, strlen("gtbase")) == 0) {
+ marvell_base = simple_strtol(ptr + strlen("gtbase="),
+ NULL, 16);
+
+ if ((marvell_base & 0xffffffff00000000) == 0)
+ marvell_base |= 0xffffffff00000000;
+
+ printk("marvell_base set to 0x%016lx\n", marvell_base);
+ }
+ if (strncmp("cpuclock", ptr, strlen("cpuclock")) == 0) {
+ cpu_clock = simple_strtol(ptr + strlen("cpuclock="),
+ NULL, 10);
+ printk("cpu_clock set to %d\n", cpu_clock);
+ }
+ i++;
+ }
+ printk("arcs_cmdline: %s\n", arcs_cmdline);
+
+#else /* CONFIG_MIPS64 */
+
+ /* save the PROM vectors for debugging use */
+ debug_vectors = cv;
+
+ /* arg[0] is "g", the rest is boot parameters */
+ arcs_cmdline[0] = '\0';
+ for (i = 1; i < argc; i++) {
+ if (strlen(arcs_cmdline) + strlen(arg[i] + 1)
+ >= sizeof(arcs_cmdline))
+ break;
+ strcat(arcs_cmdline, arg[i]);
+ strcat(arcs_cmdline, " ");
+ }
+
+ while (*env) {
+ if (strncmp("gtbase", *env, strlen("gtbase")) == 0) {
+ marvell_base = simple_strtol(*env + strlen("gtbase="),
+ NULL, 16);
+ }
+ if (strncmp("cpuclock", *env, strlen("cpuclock")) == 0) {
+ cpu_clock = simple_strtol(*env + strlen("cpuclock="),
+ NULL, 10);
+ }
+ env++;
+ }
+#endif /* CONFIG_MIPS64 */
+
+ mips_machgroup = MACH_GROUP_MOMENCO;
+ mips_machtype = MACH_MOMENCO_OCELOT_3;
+
+#ifdef CONFIG_MV643XX_ETH
+ /* get the base MAC address for on-board ethernet ports */
+ get_mac(prom_mac_addr_base);
+#endif
+
+#ifndef CONFIG_MIPS64
+ debug_vectors->printf("Booting Linux kernel...\n");
+#endif
+}
+
+void __init prom_free_prom_memory(void)
+{
+}
+
+void __init prom_fixup_mem_map(unsigned long start, unsigned long end)
+{
+}
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