pal4_setup.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:5k
- /*
- * arch/ppc/platforms/pal4_setup.c
- *
- * Board setup routines for the SBS PalomarIV.
- *
- * Author: Dan Cox
- *
- * Copyright 2002 MontaVista Software Inc.
- *
- * 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/kernel.h>
- #include <linux/init.h>
- #include <linux/types.h>
- #include <linux/errno.h>
- #include <linux/reboot.h>
- #include <linux/time.h>
- #include <linux/irq.h>
- #include <linux/kdev_t.h>
- #include <linux/blk.h>
- #include <linux/console.h>
- #include <linux/seq_file.h>
- #include <asm/todc.h>
- #include <asm/bootinfo.h>
- #include "cpc700.h"
- #include "pal4.h"
- extern void pal4_find_bridges(void);
- unsigned int cpc700_irq_assigns[][2] = {
- {1, 1}, /* IRQ 0: ECC correctable error */
- {1, 1}, /* IRQ 1: PCI write to memory range */
- {0, 1}, /* IRQ 2: PCI write to command register */
- {0, 1}, /* IRQ 3: UART 0 */
- {0, 1}, /* IRQ 4: UART 1 */
- {0, 1}, /* IRQ 5: ICC 0 */
- {0, 1}, /* IRQ 6: ICC 1 */
- {0, 1}, /* IRQ 7: GPT compare 0 */
- {0, 1}, /* IRQ 8: GPT compare 1 */
- {0, 1}, /* IRQ 9: GPT compare 2 */
- {0, 1}, /* IRQ 10: GPT compare 3 */
- {0, 1}, /* IRQ 11: GPT compare 4 */
- {0, 1}, /* IRQ 12: GPT capture 0 */
- {0, 1}, /* IRQ 13: GPT capture 1 */
- {0, 1}, /* IRQ 14: GPT capture 2 */
- {0, 1}, /* IRQ 15: GPT capture 3 */
- {0, 1}, /* IRQ 16: GPT capture 4 */
- {0, 0}, /* IRQ 17: reserved */
- {0, 0}, /* IRQ 18: reserved */
- {0, 0}, /* IRQ 19: reserved */
- {0, 0}, /* IRQ 20: reserved */
- {0, 1}, /* IRQ 21: Ethernet */
- {0, 0}, /* IRQ 22: reserved */
- {0, 0}, /* IRQ 23: reserved */
- {0, 0}, /* IRQ 24: resreved */
- {0, 0}, /* IRQ 25: reserved */
- {0, 0}, /* IRQ 26: reserved */
- {0, 0}, /* IRQ 27: reserved */
- {0, 0}, /* IRQ 28: reserved */
- {0, 0}, /* IRQ 29: reserved */
- {0, 0}, /* IRQ 30: reserved */
- {0, 0}, /* IRQ 31: reserved */
- };
- static int
- pal4_show_cpuinfo(struct seq_file *m)
- {
- seq_printf(m, "boardtt: SBS Palomar IVn");
- return 0;
- }
- static void
- pal4_restart(char *cmd)
- {
- __cli();
- __asm__ __volatile__("lis 3,0xfff0n
- ori 3,3,0x100n
- mtspr 26,3n
- li 3,0n
- mtspr 27,3n
- rfi");
- for(;;);
- }
- static void
- pal4_power_off(void)
- {
- __cli();
- for(;;);
- }
- static void
- pal4_halt(void)
- {
- pal4_power_off();
- }
- static unsigned long __init
- pal4_find_end_of_memory(void)
- {
- int i;
- unsigned long len, amt, batu, batl;
- __asm__ __volatile__("lis %0,0xf000n
- ori %1,%0,0x002an
- ori %0,%0,0x1ffen
- mtspr 0x21e,%0n
- mtspr 0x21f,%1n
- isyncn
- sync" : "=r" (batu), "=r" (batl));
- for(len = 0, i = CPC700_MB1EA; i <= CPC700_MB4EA; i+=4) {
- amt = cpc700_read_memreg(i);
- if (amt == 0)
- break;
- len = amt;
- }
- return len;
- }
- TODC_ALLOC();
- static void __init
- pal4_setup_arch(void)
- {
- unsigned long l2;
- TODC_INIT(TODC_TYPE_MK48T37, 0, 0,
- ioremap(PAL4_NVRAM, PAL4_NVRAM_SIZE), 8);
- pal4_find_bridges();
- #ifdef CONFIG_BLK_DEV_INITRD
- if (initrd_start)
- ROOT_DEV = MKDEV(RAMDISK_MAJOR, 0);
- else
- #endif
- ROOT_DEV = to_kdev_t(0x00ff);
- /* The L2 gets disabled in the bootloader, but all the proper
- bits should be present from the fw, so just re-enable it */
- l2 = _get_L2CR();
- if (!(l2 & L2CR_L2E)) {
- /* presume that it was initially set if the size is
- still present. */
- if (l2 ^ L2CR_L2SIZ_MASK)
- _set_L2CR(l2 | L2CR_L2E);
- else
- printk("L2 not set by firmware; left disabled.n");
- }
- }
- static void __init
- pal4_map_io(void)
- {
- io_block_mapping(0xf0000000, 0xf0000000, 0x10000000, _PAGE_IO);
- }
- void __init
- platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7)
- {
- parse_bootinfo(find_bootinfo());
- isa_io_base = 0 /*PAL4_ISA_IO_BASE*/;
- pci_dram_offset = 0 /*PAL4_PCI_SYS_MEM_BASE*/;
-
- ppc_md.setup_arch = pal4_setup_arch;
- ppc_md.show_cpuinfo = pal4_show_cpuinfo;
-
- ppc_md.find_end_of_memory = pal4_find_end_of_memory;
- ppc_md.setup_io_mappings = pal4_map_io;
- ppc_md.init_IRQ = cpc700_init_IRQ;
- ppc_md.get_irq = cpc700_get_irq;
- ppc_md.restart = pal4_restart;
- ppc_md.halt = pal4_halt;
- ppc_md.power_off = pal4_power_off;
- ppc_md.time_init = todc_time_init;
- ppc_md.set_rtc_time = todc_set_rtc_time;
- ppc_md.get_rtc_time = todc_get_rtc_time;
- ppc_md.calibrate_decr = todc_calibrate_decr;
- ppc_md.nvram_read_val = todc_direct_read_val;
- ppc_md.nvram_write_val = todc_direct_write_val;
- }