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/*
* BK Id: SCCS/s.m8260_setup.c 1.30 11/13/01 21:26:07 paulus
*/
/*
* linux/arch/ppc/kernel/setup.c
*
* Copyright (C) 1995 Linus Torvalds
* Adapted from 'alpha' version by Gary Thomas
* Modified by Cort Dougan (cort@cs.nmt.edu)
* Modified for MBX using prep/chrp/pmac functions by Dan (dmalek@jlc.net)
* Further modified for generic 8xx and 8260 by Dan.
*/
/*
* bootup setup stuff..
*/
#include <linux/config.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/user.h>
#include <linux/a.out.h>
#include <linux/tty.h>
#include <linux/major.h>
#include <linux/interrupt.h>
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/blk.h>
#include <linux/ioport.h>
#include <linux/ide.h>
#include <linux/seq_file.h>
#include <asm/mmu.h>
#include <asm/processor.h>
#include <asm/residual.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/ide.h>
#include <asm/mpc8260.h>
#include <asm/immap_8260.h>
#include <asm/machdep.h>
#include <asm/time.h>
#include "ppc8260_pic.h"
static int m8260_set_rtc_time(unsigned long time);
static unsigned long m8260_get_rtc_time(void);
static void m8260_calibrate_decr(void);
unsigned char __res[sizeof(bd_t)];
extern void m8260_cpm_reset(void);
static void __init
m8260_setup_arch(void)
{
/* Reset the Communication Processor Module.
*/
m8260_cpm_reset();
}
static void
abort(void)
{
#ifdef CONFIG_XMON
extern void xmon(void *);
xmon(0);
#endif
machine_restart(NULL);
}
/* The decrementer counts at the system (internal) clock frequency
* divided by four.
*/
static void __init
m8260_calibrate_decr(void)
{
bd_t *binfo = (bd_t *)__res;
int freq, divisor;
freq = binfo->bi_busfreq;
divisor = 4;
tb_ticks_per_jiffy = freq / HZ / divisor;
tb_to_us = mulhwu_scale_factor(freq / divisor, 1000000);
}
/* The 8260 has an internal 1-second timer update register that
* we should use for this purpose.
*/
static uint rtc_time;
static static int
m8260_set_rtc_time(unsigned long time)
{
rtc_time = time;
return(0);
}
static unsigned long
m8260_get_rtc_time(void)
{
/* Get time from the RTC.
*/
return((unsigned long)rtc_time);
}
static void
m8260_restart(char *cmd)
{
extern void m8260_gorom(bd_t *bi, uint addr);
uint startaddr;
/* Most boot roms have a warmstart as the second instruction
* of the reset vector. If that doesn't work for you, change this
* or the reboot program to send a proper address.
*/
startaddr = 0xff000104;
if (cmd != NULL) {
if (!strncmp(cmd, "startaddr=", 10))
startaddr = simple_strtoul(&cmd[10], NULL, 0);
}
m8260_gorom((unsigned int)__pa(__res), startaddr);
}
static void
m8260_power_off(void)
{
m8260_restart(NULL);
}
static void
m8260_halt(void)
{
m8260_restart(NULL);
}
static int
m8260_show_percpuinfo(struct seq_file *m, int i)
{
bd_t *bp;
bp = (bd_t *)__res;
seq_printf(m, "core clock\t: %d MHz\n"
"CPM clock\t: %d MHz\n"
"bus clock\t: %d MHz\n",
bp->bi_intfreq / 1000000,
bp->bi_cpmfreq / 1000000,
bp->bi_busfreq / 1000000);
return 0;
}
/* Initialize the internal interrupt controller. The number of
* interrupts supported can vary with the processor type, and the
* 8260 family can have up to 64.
* External interrupts can be either edge or level triggered, and
* need to be initialized by the appropriate driver.
*/
static void __init
m8260_init_IRQ(void)
{
int i;
void cpm_interrupt_init(void);
#if 0
ppc8260_pic.irq_offset = 0;
#endif
for ( i = 0 ; i < NR_SIU_INTS ; i++ )
irq_desc[i].handler = &ppc8260_pic;
/* Initialize the default interrupt mapping priorities,
* in case the boot rom changed something on us.
*/
immr->im_intctl.ic_sicr = 0;
immr->im_intctl.ic_siprr = 0x05309770;
immr->im_intctl.ic_scprrh = 0x05309770;
immr->im_intctl.ic_scprrl = 0x05309770;
}
/*
* Same hack as 8xx
*/
static unsigned long __init
m8260_find_end_of_memory(void)
{
bd_t *binfo;
extern unsigned char __res[];
binfo = (bd_t *)__res;
return binfo->bi_memsize;
}
/* Map the IMMR, plus anything else we can cover
* in that upper space according to the memory controller
* chip select mapping. Grab another bunch of space
* below that for stuff we can't cover in the upper.
*/
static void __init
m8260_map_io(void)
{
io_block_mapping(0xf0000000, 0xf0000000, 0x10000000, _PAGE_IO);
io_block_mapping(0xe0000000, 0xe0000000, 0x10000000, _PAGE_IO);
}
void __init
platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
if ( r3 )
memcpy( (void *)__res,(void *)(r3+KERNELBASE), sizeof(bd_t) );
#ifdef CONFIG_BLK_DEV_INITRD
/* take care of initrd if we have one */
if ( r4 )
{
initrd_start = r4 + KERNELBASE;
initrd_end = r5 + KERNELBASE;
}
#endif /* CONFIG_BLK_DEV_INITRD */
/* take care of cmd line */
if ( r6 )
{
*(char *)(r7+KERNELBASE) = 0;
strcpy(cmd_line, (char *)(r6+KERNELBASE));
}
ppc_md.setup_arch = m8260_setup_arch;
ppc_md.show_percpuinfo = m8260_show_percpuinfo;
ppc_md.irq_cannonicalize = NULL;
ppc_md.init_IRQ = m8260_init_IRQ;
ppc_md.get_irq = m8260_get_irq;
ppc_md.init = NULL;
ppc_md.restart = m8260_restart;
ppc_md.power_off = m8260_power_off;
ppc_md.halt = m8260_halt;
ppc_md.time_init = NULL;
ppc_md.set_rtc_time = m8260_set_rtc_time;
ppc_md.get_rtc_time = m8260_get_rtc_time;
ppc_md.calibrate_decr = m8260_calibrate_decr;
ppc_md.find_end_of_memory = m8260_find_end_of_memory;
ppc_md.setup_io_mappings = m8260_map_io;
ppc_md.kbd_setkeycode = NULL;
ppc_md.kbd_getkeycode = NULL;
ppc_md.kbd_translate = NULL;
ppc_md.kbd_unexpected_up = NULL;
ppc_md.kbd_leds = NULL;
ppc_md.kbd_init_hw = NULL;
ppc_md.ppc_kbd_sysrq_xlate = NULL;
}
/* Mainly for ksyms.
*/
int
request_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *),
unsigned long flag, const char *naem, void *dev)
{
panic("request IRQ\n");
}
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