prom.c
上传用户:lgb322
上传日期:2013-02-24
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文件大小:2k
- /*
- * 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/init.h>
- #include <linux/mm.h>
- #include <linux/sched.h>
- #include <linux/bootmem.h>
- #include <asm/addrspace.h>
- #include <asm/bootinfo.h>
- #define PLD_BASE 0xbc000000
- #define REV 0x0 /* Board Assembly Revision */
- #define PLD1ID 0x1 /* PLD 1 ID */
- #define PLD2ID 0x2 /* PLD 2 ID */
- #define RESET_STAT 0x3 /* Reset Status Register */
- #define BOARD_STAT 0x4 /* Board Status Register */
- #define CPCI_ID 0x5 /* Compact PCI ID Register */
- #define CONTROL 0x8 /* Control Register */
- #define CPU_EEPROM 0x9 /* CPU Configuration EEPROM Register */
- #define INTMASK 0xA /* Interrupt Mask Register */
- #define INTSTAT 0xB /* Interrupt Status Register */
- #define INTSET 0xC /* Interrupt Set Register */
- #define INTCLR 0xD /* Interrupt Clear Register */
- #define PLD_REG(x) ((uint8_t*)(PLD_BASE+(x)))
- char arcs_cmdline[COMMAND_LINE_SIZE];
- /* [jsun@junsun.net] PMON passes arguments in C main() style */
- void __init prom_init(int argc, const char **arg)
- {
- int i;
- /* arg[0] is "g", the rest is boot parameters */
- arcs_cmdline[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;
- /* turn off the Bit Error LED, which comes on automatically
- * at power-up reset */
- *PLD_REG(INTCLR) = 0x80;
- /* All the boards have at least 64MiB. If there's more, we
- detect and register it later */
- add_memory_region(0, 64 << 20, BOOT_MEM_RAM);
- }
- void __init prom_free_prom_memory(void)
- {
- }
- void __init prom_fixup_mem_map(unsigned long start, unsigned long end)
- {
- }