1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
193 lines
4.7 KiB
C
193 lines
4.7 KiB
C
/*
|
|
* arch/ppc/syslib/ibm44x_common.c
|
|
*
|
|
* PPC44x system library
|
|
*
|
|
* Matt Porter <mporter@kernel.crashing.org>
|
|
* Copyright 2002-2005 MontaVista Software Inc.
|
|
*
|
|
* Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
|
|
* Copyright (c) 2003, 2004 Zultys Technologies
|
|
*
|
|
* 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/time.h>
|
|
#include <linux/types.h>
|
|
#include <linux/serial.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <asm/ibm44x.h>
|
|
#include <asm/mmu.h>
|
|
#include <asm/machdep.h>
|
|
#include <asm/time.h>
|
|
#include <asm/ppc4xx_pic.h>
|
|
#include <asm/param.h>
|
|
|
|
#include <syslib/gen550.h>
|
|
|
|
phys_addr_t fixup_bigphys_addr(phys_addr_t addr, phys_addr_t size)
|
|
{
|
|
phys_addr_t page_4gb = 0;
|
|
|
|
/*
|
|
* Trap the least significant 32-bit portions of an
|
|
* address in the 440's 36-bit address space. Fix
|
|
* them up with the appropriate ERPN
|
|
*/
|
|
if ((addr >= PPC44x_IO_LO) && (addr <= PPC44x_IO_HI))
|
|
page_4gb = PPC44x_IO_PAGE;
|
|
else if ((addr >= PPC44x_PCI0CFG_LO) && (addr <= PPC44x_PCI0CFG_HI))
|
|
page_4gb = PPC44x_PCICFG_PAGE;
|
|
#ifdef CONFIG_440SP
|
|
else if ((addr >= PPC44x_PCI1CFG_LO) && (addr <= PPC44x_PCI1CFG_HI))
|
|
page_4gb = PPC44x_PCICFG_PAGE;
|
|
else if ((addr >= PPC44x_PCI2CFG_LO) && (addr <= PPC44x_PCI2CFG_HI))
|
|
page_4gb = PPC44x_PCICFG_PAGE;
|
|
#endif
|
|
else if ((addr >= PPC44x_PCIMEM_LO) && (addr <= PPC44x_PCIMEM_HI))
|
|
page_4gb = PPC44x_PCIMEM_PAGE;
|
|
|
|
return (page_4gb | addr);
|
|
};
|
|
EXPORT_SYMBOL(fixup_bigphys_addr);
|
|
|
|
void __init ibm44x_calibrate_decr(unsigned int freq)
|
|
{
|
|
tb_ticks_per_jiffy = freq / HZ;
|
|
tb_to_us = mulhwu_scale_factor(freq, 1000000);
|
|
|
|
/* Set the time base to zero */
|
|
mtspr(SPRN_TBWL, 0);
|
|
mtspr(SPRN_TBWU, 0);
|
|
|
|
/* Clear any pending timer interrupts */
|
|
mtspr(SPRN_TSR, TSR_ENW | TSR_WIS | TSR_DIS | TSR_FIS);
|
|
|
|
/* Enable decrementer interrupt */
|
|
mtspr(SPRN_TCR, TCR_DIE);
|
|
}
|
|
|
|
extern void abort(void);
|
|
|
|
static void ibm44x_restart(char *cmd)
|
|
{
|
|
local_irq_disable();
|
|
abort();
|
|
}
|
|
|
|
static void ibm44x_power_off(void)
|
|
{
|
|
local_irq_disable();
|
|
for(;;);
|
|
}
|
|
|
|
static void ibm44x_halt(void)
|
|
{
|
|
local_irq_disable();
|
|
for(;;);
|
|
}
|
|
|
|
/*
|
|
* Read the 44x memory controller to get size of system memory.
|
|
*/
|
|
static unsigned long __init ibm44x_find_end_of_memory(void)
|
|
{
|
|
u32 i, bank_config;
|
|
u32 mem_size = 0;
|
|
|
|
for (i=0; i<4; i++)
|
|
{
|
|
switch (i)
|
|
{
|
|
case 0:
|
|
mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B0CR);
|
|
break;
|
|
case 1:
|
|
mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B1CR);
|
|
break;
|
|
case 2:
|
|
mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B2CR);
|
|
break;
|
|
case 3:
|
|
mtdcr(DCRN_SDRAM0_CFGADDR, SDRAM0_B3CR);
|
|
break;
|
|
}
|
|
|
|
bank_config = mfdcr(DCRN_SDRAM0_CFGDATA);
|
|
|
|
if (!(bank_config & SDRAM_CONFIG_BANK_ENABLE))
|
|
continue;
|
|
switch (SDRAM_CONFIG_BANK_SIZE(bank_config))
|
|
{
|
|
case SDRAM_CONFIG_SIZE_8M:
|
|
mem_size += PPC44x_MEM_SIZE_8M;
|
|
break;
|
|
case SDRAM_CONFIG_SIZE_16M:
|
|
mem_size += PPC44x_MEM_SIZE_16M;
|
|
break;
|
|
case SDRAM_CONFIG_SIZE_32M:
|
|
mem_size += PPC44x_MEM_SIZE_32M;
|
|
break;
|
|
case SDRAM_CONFIG_SIZE_64M:
|
|
mem_size += PPC44x_MEM_SIZE_64M;
|
|
break;
|
|
case SDRAM_CONFIG_SIZE_128M:
|
|
mem_size += PPC44x_MEM_SIZE_128M;
|
|
break;
|
|
case SDRAM_CONFIG_SIZE_256M:
|
|
mem_size += PPC44x_MEM_SIZE_256M;
|
|
break;
|
|
case SDRAM_CONFIG_SIZE_512M:
|
|
mem_size += PPC44x_MEM_SIZE_512M;
|
|
break;
|
|
}
|
|
}
|
|
return mem_size;
|
|
}
|
|
|
|
void __init ibm44x_platform_init(void)
|
|
{
|
|
ppc_md.init_IRQ = ppc4xx_pic_init;
|
|
ppc_md.find_end_of_memory = ibm44x_find_end_of_memory;
|
|
ppc_md.restart = ibm44x_restart;
|
|
ppc_md.power_off = ibm44x_power_off;
|
|
ppc_md.halt = ibm44x_halt;
|
|
|
|
#ifdef CONFIG_SERIAL_TEXT_DEBUG
|
|
ppc_md.progress = gen550_progress;
|
|
#endif /* CONFIG_SERIAL_TEXT_DEBUG */
|
|
#ifdef CONFIG_KGDB
|
|
ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
|
|
#endif
|
|
|
|
/*
|
|
* The Abatron BDI JTAG debugger does not tolerate others
|
|
* mucking with the debug registers.
|
|
*/
|
|
#if !defined(CONFIG_BDI_SWITCH)
|
|
/* Enable internal debug mode */
|
|
mtspr(SPRN_DBCR0, (DBCR0_IDM));
|
|
|
|
/* Clear any residual debug events */
|
|
mtspr(SPRN_DBSR, 0xffffffff);
|
|
#endif
|
|
}
|
|
|
|
/* Called from MachineCheckException */
|
|
void platform_machine_check(struct pt_regs *regs)
|
|
{
|
|
printk("PLB0: BEAR=0x%08x%08x ACR= 0x%08x BESR= 0x%08x\n",
|
|
mfdcr(DCRN_PLB0_BEARH), mfdcr(DCRN_PLB0_BEARL),
|
|
mfdcr(DCRN_PLB0_ACR), mfdcr(DCRN_PLB0_BESR));
|
|
printk("POB0: BEAR=0x%08x%08x BESR0=0x%08x BESR1=0x%08x\n",
|
|
mfdcr(DCRN_POB0_BEARH), mfdcr(DCRN_POB0_BEARL),
|
|
mfdcr(DCRN_POB0_BESR0), mfdcr(DCRN_POB0_BESR1));
|
|
printk("OPB0: BEAR=0x%08x%08x BSTAT=0x%08x\n",
|
|
mfdcr(DCRN_OPB0_BEARH), mfdcr(DCRN_OPB0_BEARL),
|
|
mfdcr(DCRN_OPB0_BSTAT));
|
|
}
|