![Kumar Gala](/assets/img/avatar_default.png)
Added a proper prototype for cpm2_reset() which gets rid of a build warning. Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <kumar.gala@freescale.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
271 lines
6.3 KiB
C
271 lines
6.3 KiB
C
/*
|
|
* arch/ppc/syslib/m8260_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.
|
|
*/
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/stddef.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/init.h>
|
|
#include <linux/initrd.h>
|
|
#include <linux/root_dev.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/irq.h>
|
|
|
|
#include <asm/mmu.h>
|
|
#include <asm/io.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/mpc8260.h>
|
|
#include <asm/cpm2.h>
|
|
#include <asm/machdep.h>
|
|
#include <asm/bootinfo.h>
|
|
#include <asm/time.h>
|
|
|
|
#include "cpm2_pic.h"
|
|
|
|
unsigned char __res[sizeof(bd_t)];
|
|
|
|
extern void pq2_find_bridges(void);
|
|
extern void pq2pci_init_irq(void);
|
|
extern void idma_pci9_init(void);
|
|
|
|
/* Place-holder for board-specific init */
|
|
void __attribute__ ((weak)) __init
|
|
m82xx_board_setup(void)
|
|
{
|
|
}
|
|
|
|
static void __init
|
|
m8260_setup_arch(void)
|
|
{
|
|
/* Print out Vendor and Machine info. */
|
|
printk(KERN_INFO "%s %s port\n", CPUINFO_VENDOR, CPUINFO_MACHINE);
|
|
|
|
/* Reset the Communication Processor Module. */
|
|
cpm2_reset();
|
|
#ifdef CONFIG_8260_PCI9
|
|
/* Initialise IDMA for PCI erratum workaround */
|
|
idma_pci9_init();
|
|
#endif
|
|
#ifdef CONFIG_PCI_8260
|
|
pq2_find_bridges();
|
|
#endif
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
if (initrd_start)
|
|
ROOT_DEV = Root_RAM0;
|
|
#endif
|
|
m82xx_board_setup();
|
|
}
|
|
|
|
/* 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 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);
|
|
}
|
|
|
|
#ifndef BOOTROM_RESTART_ADDR
|
|
#warning "Using default BOOTROM_RESTART_ADDR!"
|
|
#define BOOTROM_RESTART_ADDR 0xff000104
|
|
#endif
|
|
|
|
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 = BOOTROM_RESTART_ADDR;
|
|
if (cmd != NULL) {
|
|
if (!strncmp(cmd, "startaddr=", 10))
|
|
startaddr = simple_strtoul(&cmd[10], NULL, 0);
|
|
}
|
|
|
|
m8260_gorom((void*)__pa(__res), startaddr);
|
|
}
|
|
|
|
static void
|
|
m8260_halt(void)
|
|
{
|
|
local_irq_disable();
|
|
while (1);
|
|
}
|
|
|
|
static void
|
|
m8260_power_off(void)
|
|
{
|
|
m8260_halt();
|
|
}
|
|
|
|
static int
|
|
m8260_show_cpuinfo(struct seq_file *m)
|
|
{
|
|
bd_t *bp = (bd_t *)__res;
|
|
|
|
seq_printf(m, "vendor\t\t: %s\n"
|
|
"machine\t\t: %s\n"
|
|
"\n"
|
|
"mem size\t\t: 0x%08x\n"
|
|
"console baud\t\t: %d\n"
|
|
"\n"
|
|
"core clock\t: %u MHz\n"
|
|
"CPM clock\t: %u MHz\n"
|
|
"bus clock\t: %u MHz\n",
|
|
CPUINFO_VENDOR, CPUINFO_MACHINE, bp->bi_memsize,
|
|
bp->bi_baudrate, 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)
|
|
{
|
|
cpm2_init_IRQ();
|
|
|
|
/* Initialize the default interrupt mapping priorities,
|
|
* in case the boot rom changed something on us.
|
|
*/
|
|
cpm2_immr->im_intctl.ic_siprr = 0x05309770;
|
|
|
|
#if defined(CONFIG_PCI) && (defined(CONFIG_ADS8272) || defined(CONFIG_PQ2FADS))
|
|
/* Initialize stuff for the 82xx CPLD IC and install demux */
|
|
pq2pci_init_irq();
|
|
#endif
|
|
|
|
}
|
|
|
|
/*
|
|
* Same hack as 8xx
|
|
*/
|
|
static unsigned long __init
|
|
m8260_find_end_of_memory(void)
|
|
{
|
|
bd_t *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)
|
|
{
|
|
uint addr;
|
|
|
|
/* Map IMMR region to a 256MB BAT */
|
|
addr = (cpm2_immr != NULL) ? (uint)cpm2_immr : CPM_MAP_ADDR;
|
|
io_block_mapping(addr, addr, 0x10000000, _PAGE_IO);
|
|
|
|
/* Map I/O region to a 256MB BAT */
|
|
io_block_mapping(IO_VIRT_ADDR, IO_PHYS_ADDR, 0x10000000, _PAGE_IO);
|
|
}
|
|
|
|
/* Place-holder for board-specific ppc_md hooking */
|
|
void __attribute__ ((weak)) __init
|
|
m82xx_board_init(void)
|
|
{
|
|
}
|
|
|
|
/* Inputs:
|
|
* r3 - Optional pointer to a board information structure.
|
|
* r4 - Optional pointer to the physical starting address of the init RAM
|
|
* disk.
|
|
* r5 - Optional pointer to the physical ending address of the init RAM
|
|
* disk.
|
|
* r6 - Optional pointer to the physical starting address of any kernel
|
|
* command-line parameters.
|
|
* r7 - Optional pointer to the physical ending address of any kernel
|
|
* command-line parameters.
|
|
*/
|
|
void __init
|
|
platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
|
|
unsigned long r6, unsigned long r7)
|
|
{
|
|
parse_bootinfo(find_bootinfo());
|
|
|
|
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_cpuinfo = m8260_show_cpuinfo;
|
|
ppc_md.init_IRQ = m8260_init_IRQ;
|
|
ppc_md.get_irq = cpm2_get_irq;
|
|
|
|
ppc_md.restart = m8260_restart;
|
|
ppc_md.power_off = m8260_power_off;
|
|
ppc_md.halt = m8260_halt;
|
|
|
|
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;
|
|
|
|
/* Call back for board-specific settings and overrides. */
|
|
m82xx_board_init();
|
|
}
|