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acrn-kernel/arch/ppc/syslib/ibm44x_common.c

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/*
* 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 <linux/initrd.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 <asm/bootinfo.h>
#include <asm/ppcboot.h>
#include <syslib/gen550.h>
/* Global Variables */
bd_t __res;
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(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
parse_bootinfo(find_bootinfo());
/*
* If we were passed in a board information, copy it into the
* residual data area.
*/
if (r3)
__res = *(bd_t *)(r3 + KERNELBASE);
#if defined(CONFIG_BLK_DEV_INITRD)
/*
* If the init RAM disk has been configured in, and there's a valid
* starting address for it, set it up.
*/
if (r4) {
initrd_start = r4 + KERNELBASE;
initrd_end = r5 + KERNELBASE;
}
#endif /* CONFIG_BLK_DEV_INITRD */
/* Copy the kernel command line arguments to a safe place. */
if (r6) {
*(char *) (r7 + KERNELBASE) = 0;
strcpy(cmd_line, (char *) (r6 + KERNELBASE));
}
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 machine_check_exception */
void platform_machine_check(struct pt_regs *regs)
{
#if defined(CONFIG_440SP) || defined(CONFIG_440SPE)
printk("PLB0: BEAR=0x%08x%08x ACR= 0x%08x BESR= 0x%08x%08x\n",
mfdcr(DCRN_PLB0_BEARH), mfdcr(DCRN_PLB0_BEARL),
mfdcr(DCRN_PLB0_ACR), mfdcr(DCRN_PLB0_BESRH),
mfdcr(DCRN_PLB0_BESRL));
printk("PLB1: BEAR=0x%08x%08x ACR= 0x%08x BESR= 0x%08x%08x\n",
mfdcr(DCRN_PLB1_BEARH), mfdcr(DCRN_PLB1_BEARL),
mfdcr(DCRN_PLB1_ACR), mfdcr(DCRN_PLB1_BESRH),
mfdcr(DCRN_PLB1_BESRL));
#else
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));
#endif
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));
}
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