patch-2.4.22 linux-2.4.22/arch/mips/momentum/ocelot_c/prom.c
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- Lines: 152
- Date:
2003-08-25 04:44:40.000000000 -0700
- Orig file:
linux-2.4.21/arch/mips/momentum/ocelot_c/prom.c
- Orig date:
1969-12-31 16:00:00.000000000 -0800
diff -urN linux-2.4.21/arch/mips/momentum/ocelot_c/prom.c linux-2.4.22/arch/mips/momentum/ocelot_c/prom.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright 2002 Momentum Computer Inc.
+ * Author: Matthew Dharm <mdharm@momenco.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.
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/bootmem.h>
+
+#include <asm/addrspace.h>
+#include <asm/bootinfo.h>
+#include <asm/mv64340.h>
+
+#include "ocelot_c_fpga.h"
+
+struct callvectors {
+ int (*open) (char*, int, int);
+ int (*close) (int);
+ int (*read) (int, void*, int);
+ int (*write) (int, void*, int);
+ off_t (*lseek) (int, off_t, int);
+ int (*printf) (const char*, ...);
+ void (*cacheflush) (void);
+ char* (*gets) (char*);
+};
+
+struct callvectors* debug_vectors;
+char arcs_cmdline[CL_SIZE];
+
+extern unsigned long mv64340_base;
+extern unsigned long cpu_clock;
+
+#ifdef CONFIG_MV64340_ETH
+extern unsigned char prom_mac_addr_base[6];
+#endif
+
+const char *get_system_type(void)
+{
+#ifdef CONFIG_CPU_SR71000
+ return "Momentum Ocelot-CS";
+#else
+ return "Momentum Ocelot-C";
+#endif
+}
+
+#ifdef CONFIG_MV64340_ETH
+static void burn_clocks(void)
+{
+ int i;
+
+ /* this loop should burn at least 1us -- this should be plenty */
+ for (i = 0; i < 0x10000; i++)
+ ;
+}
+
+static 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
+
+/* [jsun@junsun.net] PMON passes arguments in C main() style */
+void __init prom_init(int argc, char **arg, char** env, struct callvectors *cv)
+{
+ int i;
+
+ /* 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, " ");
+ }
+
+ mips_machgroup = MACH_GROUP_MOMENCO;
+ mips_machtype = MACH_MOMENCO_OCELOT_C;
+
+ while (*env) {
+ if (strncmp("gtbase", *env, strlen("gtbase")) == 0) {
+ mv64340_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++;
+ }
+
+#ifdef CONFIG_MV64340_ETH
+ /* get the base MAC address for on-board ethernet ports */
+ get_mac(prom_mac_addr_base);
+#endif
+
+ debug_vectors->printf("Booting Linux kernel...\n");
+}
+
+void __init prom_free_prom_memory(void)
+{
+}
+
+void __init prom_fixup_mem_map(unsigned long start, unsigned long end)
+{
+}
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