+++ /dev/null
-/*
- * 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/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));
-}
git.samba.org / sfrench / cifs-2.6.git / blobdiff