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linux-IllusionX/arch/mips/momentum/ocelot_c/setup.c
Ralf Baechle 2925aba422 [MIPS] Cleanup memory managment initialization. 
Historically plat_mem_setup did the entire platform initialization.  This
was rather impractical because it meant plat_mem_setup had to get away
without any kind of memory allocator.  To keep old code from breaking
plat_setup was just renamed to plat_setup and a second platform
initialization hook for anything else was introduced.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-06-19 17:39:23 +01:00

370 lines
11 KiB
C
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/*
* BRIEF MODULE DESCRIPTION
* Momentum Computer Ocelot-C and -CS board dependent boot routines
*
* Copyright (C) 1996, 1997, 2001 Ralf Baechle
* Copyright (C) 2000 RidgeRun, Inc.
* Copyright (C) 2001 Red Hat, Inc.
* Copyright (C) 2002 Momentum Computer
*
* Author: Matthew Dharm, Momentum Computer
* mdharm@momenco.com
*
* Louis Hamilton, Red Hat, Inc.
* hamilton@redhat.com [MIPS64 modifications]
*
* Author: RidgeRun, Inc.
* glonnon@ridgerun.com, skranz@ridgerun.com, stevej@ridgerun.com
*
* 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.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <linux/config.h>
#include <linux/bcd.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/swap.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/pm.h>
#include <linux/timex.h>
#include <linux/vmalloc.h>
#include <linux/mv643xx.h>
#include <asm/time.h>
#include <asm/bootinfo.h>
#include <asm/page.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/pci.h>
#include <asm/processor.h>
#include <asm/ptrace.h>
#include <asm/reboot.h>
#include <asm/marvell.h>
#include <linux/bootmem.h>
#include <linux/blkdev.h>
#include "ocelot_c_fpga.h"
unsigned long marvell_base;
extern unsigned long mv64340_sram_base;
unsigned long cpu_clock;
/* These functions are used for rebooting or halting the machine*/
extern void momenco_ocelot_restart(char *command);
extern void momenco_ocelot_halt(void);
extern void momenco_ocelot_power_off(void);
void momenco_time_init(void);
static char reset_reason;
void add_wired_entry(unsigned long entrylo0, unsigned long entrylo1, unsigned long entryhi, unsigned long pagemask);
static unsigned long ENTRYLO(unsigned long paddr)
{
return ((paddr & PAGE_MASK) |
(_PAGE_PRESENT | __READABLE | __WRITEABLE | _PAGE_GLOBAL |
_CACHE_UNCACHED)) >> 6;
}
/* setup code for a handoff from a version 2 PMON 2000 PROM */
void PMON_v2_setup(void)
{
/* Some wired TLB entries for the MV64340 and perhiperals. The
MV64340 is going to be hit on every IRQ anyway - there's
absolutely no point in letting it be a random TLB entry, as
it'll just cause needless churning of the TLB. And we use
the other half for the serial port, which is just a PITA
otherwise :)
Device Physical Virtual
MV64340 Internal Regs 0xf4000000 0xf4000000
Ocelot-C[S] PLD (CS0) 0xfc000000 0xfc000000
NVRAM (CS1) 0xfc800000 0xfc800000
UARTs (CS2) 0xfd000000 0xfd000000
Internal SRAM 0xfe000000 0xfe000000
M-Systems DOC (CS3) 0xff000000 0xff000000
*/
printk("PMON_v2_setup\n");
#ifdef CONFIG_64BIT
/* marvell and extra space */
add_wired_entry(ENTRYLO(0xf4000000), ENTRYLO(0xf4010000), 0xfffffffff4000000, PM_64K);
/* fpga, rtc, and uart */
add_wired_entry(ENTRYLO(0xfc000000), ENTRYLO(0xfd000000), 0xfffffffffc000000, PM_16M);
/* m-sys and internal SRAM */
add_wired_entry(ENTRYLO(0xfe000000), ENTRYLO(0xff000000), 0xfffffffffe000000, PM_16M);
marvell_base = 0xfffffffff4000000;
mv64340_sram_base = 0xfffffffffe000000;
#else
/* marvell and extra space */
add_wired_entry(ENTRYLO(0xf4000000), ENTRYLO(0xf4010000), 0xf4000000, PM_64K);
/* fpga, rtc, and uart */
add_wired_entry(ENTRYLO(0xfc000000), ENTRYLO(0xfd000000), 0xfc000000, PM_16M);
/* m-sys and internal SRAM */
add_wired_entry(ENTRYLO(0xfe000000), ENTRYLO(0xff000000), 0xfe000000, PM_16M);
marvell_base = 0xf4000000;
mv64340_sram_base = 0xfe000000;
#endif
}
unsigned long m48t37y_get_time(void)
{
#ifdef CONFIG_64BIT
unsigned char *rtc_base = (unsigned char*)0xfffffffffc800000;
#else
unsigned char* rtc_base = (unsigned char*)0xfc800000;
#endif
unsigned int year, month, day, hour, min, sec;
unsigned long flags;
spin_lock_irqsave(&rtc_lock, flags);
/* stop the update */
rtc_base[0x7ff8] = 0x40;
year = BCD2BIN(rtc_base[0x7fff]);
year += BCD2BIN(rtc_base[0x7ff1]) * 100;
month = BCD2BIN(rtc_base[0x7ffe]);
day = BCD2BIN(rtc_base[0x7ffd]);
hour = BCD2BIN(rtc_base[0x7ffb]);
min = BCD2BIN(rtc_base[0x7ffa]);
sec = BCD2BIN(rtc_base[0x7ff9]);
/* start the update */
rtc_base[0x7ff8] = 0x00;
spin_unlock_irqrestore(&rtc_lock, flags);
return mktime(year, month, day, hour, min, sec);
}
int m48t37y_set_time(unsigned long sec)
{
#ifdef CONFIG_64BIT
unsigned char* rtc_base = (unsigned char*)0xfffffffffc800000;
#else
unsigned char* rtc_base = (unsigned char*)0xfc800000;
#endif
struct rtc_time tm;
unsigned long flags;
/* convert to a more useful format -- note months count from 0 */
to_tm(sec, &tm);
tm.tm_mon += 1;
spin_lock_irqsave(&rtc_lock, flags);
/* enable writing */
rtc_base[0x7ff8] = 0x80;
/* year */
rtc_base[0x7fff] = BIN2BCD(tm.tm_year % 100);
rtc_base[0x7ff1] = BIN2BCD(tm.tm_year / 100);
/* month */
rtc_base[0x7ffe] = BIN2BCD(tm.tm_mon);
/* day */
rtc_base[0x7ffd] = BIN2BCD(tm.tm_mday);
/* hour/min/sec */
rtc_base[0x7ffb] = BIN2BCD(tm.tm_hour);
rtc_base[0x7ffa] = BIN2BCD(tm.tm_min);
rtc_base[0x7ff9] = BIN2BCD(tm.tm_sec);
/* day of week -- not really used, but let's keep it up-to-date */
rtc_base[0x7ffc] = BIN2BCD(tm.tm_wday + 1);
/* disable writing */
rtc_base[0x7ff8] = 0x00;
spin_unlock_irqrestore(&rtc_lock, flags);
return 0;
}
void momenco_timer_setup(struct irqaction *irq)
{
setup_irq(7, irq);
}
void momenco_time_init(void)
{
#ifdef CONFIG_CPU_SR71000
mips_hpt_frequency = cpu_clock;
#elif defined(CONFIG_CPU_RM7000)
mips_hpt_frequency = cpu_clock / 2;
#else
#error Unknown CPU for this board
#endif
printk("momenco_time_init cpu_clock=%d\n", cpu_clock);
board_timer_setup = momenco_timer_setup;
rtc_mips_get_time = m48t37y_get_time;
rtc_mips_set_time = m48t37y_set_time;
}
void __init plat_mem_setup(void)
{
unsigned int tmpword;
board_time_init = momenco_time_init;
_machine_restart = momenco_ocelot_restart;
_machine_halt = momenco_ocelot_halt;
pm_power_off = momenco_ocelot_power_off;
/*
* initrd_start = (ulong)ocelot_initrd_start;
* initrd_end = (ulong)ocelot_initrd_start + (ulong)ocelot_initrd_size;
* initrd_below_start_ok = 1;
*/
/* do handoff reconfiguration */
PMON_v2_setup();
/* shut down ethernet ports, just to be sure our memory doesn't get
* corrupted by random ethernet traffic.
*/
MV_WRITE(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(0), 0xff << 8);
MV_WRITE(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(1), 0xff << 8);
MV_WRITE(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(0), 0xff << 8);
MV_WRITE(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(1), 0xff << 8);
do {}
while (MV_READ(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(0)) & 0xff);
do {}
while (MV_READ(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(1)) & 0xff);
do {}
while (MV_READ(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(0)) & 0xff);
do {}
while (MV_READ(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(1)) & 0xff);
MV_WRITE(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(0),
MV_READ(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(0)) & ~1);
MV_WRITE(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(1),
MV_READ(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(1)) & ~1);
/* Turn off the Bit-Error LED */
OCELOT_FPGA_WRITE(0x80, CLR);
tmpword = OCELOT_FPGA_READ(BOARDREV);
#ifdef CONFIG_CPU_SR71000
if (tmpword < 26)
printk("Momenco Ocelot-CS: Board Assembly Rev. %c\n",
'A'+tmpword);
else
printk("Momenco Ocelot-CS: Board Assembly Revision #0x%x\n",
tmpword);
#else
if (tmpword < 26)
printk("Momenco Ocelot-C: Board Assembly Rev. %c\n",
'A'+tmpword);
else
printk("Momenco Ocelot-C: Board Assembly Revision #0x%x\n",
tmpword);
#endif
tmpword = OCELOT_FPGA_READ(FPGA_REV);
printk("FPGA Rev: %d.%d\n", tmpword>>4, tmpword&15);
tmpword = OCELOT_FPGA_READ(RESET_STATUS);
printk("Reset reason: 0x%x\n", tmpword);
switch (tmpword) {
case 0x1:
printk(" - Power-up reset\n");
break;
case 0x2:
printk(" - Push-button reset\n");
break;
case 0x4:
printk(" - cPCI bus reset\n");
break;
case 0x8:
printk(" - Watchdog reset\n");
break;
case 0x10:
printk(" - Software reset\n");
break;
default:
printk(" - Unknown reset cause\n");
}
reset_reason = tmpword;
OCELOT_FPGA_WRITE(0xff, RESET_STATUS);
tmpword = OCELOT_FPGA_READ(CPCI_ID);
printk("cPCI ID register: 0x%02x\n", tmpword);
printk(" - Slot number: %d\n", tmpword & 0x1f);
printk(" - PCI bus present: %s\n", tmpword & 0x40 ? "yes" : "no");
printk(" - System Slot: %s\n", tmpword & 0x20 ? "yes" : "no");
tmpword = OCELOT_FPGA_READ(BOARD_STATUS);
printk("Board Status register: 0x%02x\n", tmpword);
printk(" - User jumper: %s\n", (tmpword & 0x80)?"installed":"absent");
printk(" - Boot flash write jumper: %s\n", (tmpword&0x40)?"installed":"absent");
printk(" - L3 Cache size: %d MiB\n", (1<<((tmpword&12) >> 2))&~1);
printk(" - SDRAM size: %d MiB\n", 1<<(6+(tmpword&3)));
switch(tmpword &3) {
case 3:
/* 512MiB */
add_memory_region(0x0, 0x200<<20, BOOT_MEM_RAM);
break;
case 2:
/* 256MiB */
add_memory_region(0x0, 0x100<<20, BOOT_MEM_RAM);
break;
case 1:
/* 128MiB */
add_memory_region(0x0, 0x80<<20, BOOT_MEM_RAM);
break;
case 0:
/* 1GiB -- needs CONFIG_HIGHMEM */
add_memory_region(0x0, 0x400<<20, BOOT_MEM_RAM);
break;
}
}
#ifndef CONFIG_64BIT
/* This needs to be one of the first initcalls, because no I/O port access
can work before this */
static int io_base_ioremap(void)
{
/* we're mapping PCI accesses from 0xc0000000 to 0xf0000000 */
void *io_remap_range = ioremap(0xc0000000, 0x30000000);
if (!io_remap_range) {
panic("Could not ioremap I/O port range");
}
printk("io_remap_range set at 0x%08x\n", (uint32_t)io_remap_range);
set_io_port_base(io_remap_range - 0xc0000000);
return 0;
}
module_init(io_base_ioremap);
#endif
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