diff options
Diffstat (limited to 'arch/ppc/syslib/m8xx_setup.c')
| -rw-r--r-- | arch/ppc/syslib/m8xx_setup.c | 465 |
1 files changed, 0 insertions, 465 deletions
diff --git a/arch/ppc/syslib/m8xx_setup.c b/arch/ppc/syslib/m8xx_setup.c deleted file mode 100644 index 18da720..0000000 --- a/arch/ppc/syslib/m8xx_setup.c +++ /dev/null @@ -1,465 +0,0 @@ -/* - * 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 by Dan. - */ - -/* - * bootup setup stuff.. - */ - -#include <linux/errno.h> -#include <linux/sched.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/stddef.h> -#include <linux/unistd.h> -#include <linux/ptrace.h> -#include <linux/slab.h> -#include <linux/user.h> -#include <linux/a.out.h> -#include <linux/tty.h> -#include <linux/major.h> -#include <linux/interrupt.h> -#include <linux/reboot.h> -#include <linux/init.h> -#include <linux/initrd.h> -#include <linux/ioport.h> -#include <linux/bootmem.h> -#include <linux/seq_file.h> -#include <linux/root_dev.h> - -#if defined(CONFIG_MTD) && defined(CONFIG_MTD_PHYSMAP) -#include <linux/mtd/partitions.h> -#include <linux/mtd/physmap.h> -#include <linux/mtd/mtd.h> -#include <linux/mtd/map.h> -#endif - -#include <asm/mmu.h> -#include <asm/reg.h> -#include <asm/residual.h> -#include <asm/io.h> -#include <asm/pgtable.h> -#include <asm/mpc8xx.h> -#include <asm/8xx_immap.h> -#include <asm/machdep.h> -#include <asm/bootinfo.h> -#include <asm/time.h> -#include <asm/xmon.h> -#include <asm/ppc_sys.h> - -#include "ppc8xx_pic.h" - -#ifdef CONFIG_MTD_PHYSMAP -#define MPC8xxADS_BANK_WIDTH 4 -#endif - -#define MPC8xxADS_U_BOOT_SIZE 0x80000 -#define MPC8xxADS_FREE_AREA_OFFSET MPC8xxADS_U_BOOT_SIZE - -#if defined(CONFIG_MTD_PARTITIONS) - /* - NOTE: bank width and interleave relative to the installed flash - should have been chosen within MTD_CFI_GEOMETRY options. - */ -static struct mtd_partition mpc8xxads_partitions[] = { - { - .name = "bootloader", - .size = MPC8xxADS_U_BOOT_SIZE, - .offset = 0, - .mask_flags = MTD_WRITEABLE, /* force read-only */ - }, { - .name = "User FS", - .offset = MPC8xxADS_FREE_AREA_OFFSET - } -}; - -#define mpc8xxads_part_num ARRAY_SIZE(mpc8xxads_partitions) - -#endif - -static int m8xx_set_rtc_time(unsigned long time); -static unsigned long m8xx_get_rtc_time(void); -void m8xx_calibrate_decr(void); - -unsigned char __res[sizeof(bd_t)]; - -extern unsigned long find_available_memory(void); -extern void m8xx_cpm_reset(void); -extern void m8xx_wdt_handler_install(bd_t *bp); -extern void rpxfb_alloc_pages(void); -extern void cpm_interrupt_init(void); - -void __attribute__ ((weak)) -board_init(void) -{ -} - -void __init -m8xx_setup_arch(void) -{ -#if defined(CONFIG_MTD) && defined(CONFIG_MTD_PHYSMAP) - bd_t *binfo = (bd_t *)__res; -#endif - - /* Reset the Communication Processor Module. - */ - m8xx_cpm_reset(); - -#ifdef CONFIG_FB_RPX - rpxfb_alloc_pages(); -#endif - -#ifdef notdef - ROOT_DEV = Root_HDA1; /* hda1 */ -#endif - -#ifdef CONFIG_BLK_DEV_INITRD -#if 0 - ROOT_DEV = Root_FD0; /* floppy */ - rd_prompt = 1; - rd_doload = 1; - rd_image_start = 0; -#endif -#if 0 /* XXX this may need to be updated for the new bootmem stuff, - or possibly just deleted (see set_phys_avail() in init.c). - - paulus. */ - /* initrd_start and size are setup by boot/head.S and kernel/head.S */ - if ( initrd_start ) - { - if (initrd_end > *memory_end_p) - { - printk("initrd extends beyond end of memory " - "(0x%08lx > 0x%08lx)\ndisabling initrd\n", - initrd_end,*memory_end_p); - initrd_start = 0; - } - } -#endif -#endif - - board_init(); -} - -void -abort(void) -{ -#ifdef CONFIG_XMON - xmon(0); -#endif - machine_restart(NULL); - - /* not reached */ - for (;;); -} - -/* A place holder for time base interrupts, if they are ever enabled. */ -irqreturn_t timebase_interrupt(int irq, void * dev) -{ - printk ("timebase_interrupt()\n"); - - return IRQ_HANDLED; -} - -static struct irqaction tbint_irqaction = { - .handler = timebase_interrupt, - .mask = CPU_MASK_NONE, - .name = "tbint", -}; - -/* per-board overridable init_internal_rtc() function. */ -void __init __attribute__ ((weak)) -init_internal_rtc(void) -{ - /* Disable the RTC one second and alarm interrupts. */ - clrbits16(&((immap_t *)IMAP_ADDR)->im_sit.sit_rtcsc, (RTCSC_SIE | RTCSC_ALE)); - - /* Enable the RTC */ - setbits16(&((immap_t *)IMAP_ADDR)->im_sit.sit_rtcsc, (RTCSC_RTF | RTCSC_RTE)); - -} - -/* The decrementer counts at the system (internal) clock frequency divided by - * sixteen, or external oscillator divided by four. We force the processor - * to use system clock divided by sixteen. - */ -void __init m8xx_calibrate_decr(void) -{ - bd_t *binfo = (bd_t *)__res; - int freq, fp, divisor; - - /* Unlock the SCCR. */ - out_be32(&((immap_t *)IMAP_ADDR)->im_clkrstk.cark_sccrk, ~KAPWR_KEY); - out_be32(&((immap_t *)IMAP_ADDR)->im_clkrstk.cark_sccrk, KAPWR_KEY); - - /* Force all 8xx processors to use divide by 16 processor clock. */ - setbits32(&((immap_t *)IMAP_ADDR)->im_clkrst.car_sccr, 0x02000000); - /* Processor frequency is MHz. - * The value 'fp' is the number of decrementer ticks per second. - */ - fp = binfo->bi_intfreq / 16; - freq = fp*60; /* try to make freq/1e6 an integer */ - divisor = 60; - printk("Decrementer Frequency = %d/%d\n", freq, divisor); - tb_ticks_per_jiffy = freq / HZ / divisor; - tb_to_us = mulhwu_scale_factor(freq / divisor, 1000000); - - /* Perform some more timer/timebase initialization. This used - * to be done elsewhere, but other changes caused it to get - * called more than once....that is a bad thing. - * - * First, unlock all of the registers we are going to modify. - * To protect them from corruption during power down, registers - * that are maintained by keep alive power are "locked". To - * modify these registers we have to write the key value to - * the key location associated with the register. - * Some boards power up with these unlocked, while others - * are locked. Writing anything (including the unlock code?) - * to the unlocked registers will lock them again. So, here - * we guarantee the registers are locked, then we unlock them - * for our use. - */ - out_be32(&((immap_t *)IMAP_ADDR)->im_sitk.sitk_tbscrk, ~KAPWR_KEY); - out_be32(&((immap_t *)IMAP_ADDR)->im_sitk.sitk_rtcsck, ~KAPWR_KEY); - out_be32(&((immap_t *)IMAP_ADDR)->im_sitk.sitk_tbk, ~KAPWR_KEY); - out_be32(&((immap_t *)IMAP_ADDR)->im_sitk.sitk_tbscrk, KAPWR_KEY); - out_be32(&((immap_t *)IMAP_ADDR)->im_sitk.sitk_rtcsck, KAPWR_KEY); - out_be32(&((immap_t *)IMAP_ADDR)->im_sitk.sitk_tbk, KAPWR_KEY); - - init_internal_rtc(); - - /* Enabling the decrementer also enables the timebase interrupts - * (or from the other point of view, to get decrementer interrupts - * we have to enable the timebase). The decrementer interrupt - * is wired into the vector table, nothing to do here for that. - */ - out_be16(&((immap_t *)IMAP_ADDR)->im_sit.sit_tbscr, (mk_int_int_mask(DEC_INTERRUPT) << 8) | (TBSCR_TBF | TBSCR_TBE)); - - if (setup_irq(DEC_INTERRUPT, &tbint_irqaction)) - panic("Could not allocate timer IRQ!"); - -#ifdef CONFIG_8xx_WDT - /* Install watchdog timer handler early because it might be - * already enabled by the bootloader - */ - m8xx_wdt_handler_install(binfo); -#endif -} - -/* The RTC on the MPC8xx is an internal register. - * We want to protect this during power down, so we need to unlock, - * modify, and re-lock. - */ -static int -m8xx_set_rtc_time(unsigned long time) -{ - out_be32(&((immap_t *)IMAP_ADDR)->im_sitk.sitk_rtck, KAPWR_KEY); - out_be32(&((immap_t *)IMAP_ADDR)->im_sit.sit_rtc, time); - out_be32(&((immap_t *)IMAP_ADDR)->im_sitk.sitk_rtck, ~KAPWR_KEY); - return(0); -} - -static unsigned long -m8xx_get_rtc_time(void) -{ - /* Get time from the RTC. */ - return (unsigned long) in_be32(&((immap_t *)IMAP_ADDR)->im_sit.sit_rtc); -} - -static void -m8xx_restart(char *cmd) -{ - __volatile__ unsigned char dummy; - - local_irq_disable(); - - setbits32(&((immap_t *)IMAP_ADDR)->im_clkrst.car_plprcr, 0x00000080); - /* Clear the ME bit in MSR to cause checkstop on machine check - */ - mtmsr(mfmsr() & ~0x1000); - - dummy = in_8(&((immap_t *)IMAP_ADDR)->im_clkrst.res[0]); - printk("Restart failed\n"); - while(1); -} - -static void -m8xx_power_off(void) -{ - m8xx_restart(NULL); -} - -static void -m8xx_halt(void) -{ - m8xx_restart(NULL); -} - - -static int -m8xx_show_percpuinfo(struct seq_file *m, int i) -{ - bd_t *bp; - - bp = (bd_t *)__res; - - seq_printf(m, "clock\t\t: %uMHz\n" - "bus clock\t: %uMHz\n", - bp->bi_intfreq / 1000000, - bp->bi_busfreq / 1000000); - - return 0; -} - -#ifdef CONFIG_PCI -static struct irqaction mbx_i8259_irqaction = { - .handler = mbx_i8259_action, - .mask = CPU_MASK_NONE, - .name = "i8259 cascade", -}; -#endif - -/* Initialize the internal interrupt controller. The number of - * interrupts supported can vary with the processor type, and the - * 82xx 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 -m8xx_init_IRQ(void) -{ - int i; - - for (i = SIU_IRQ_OFFSET ; i < SIU_IRQ_OFFSET + NR_SIU_INTS ; i++) - irq_desc[i].chip = &ppc8xx_pic; - - cpm_interrupt_init(); - -#if defined(CONFIG_PCI) - for (i = I8259_IRQ_OFFSET ; i < I8259_IRQ_OFFSET + NR_8259_INTS ; i++) - irq_desc[i].chip = &i8259_pic; - - i8259_pic_irq_offset = I8259_IRQ_OFFSET; - i8259_init(0); - - /* The i8259 cascade interrupt must be level sensitive. */ - - clrbits32(&((immap_t *)IMAP_ADDR)->im_siu_conf.sc_siel, (0x80000000 >> ISA_BRIDGE_INT)); - if (setup_irq(ISA_BRIDGE_INT, &mbx_i8259_irqaction)) - enable_irq(ISA_BRIDGE_INT); -#endif /* CONFIG_PCI */ -} - -/* -------------------------------------------------------------------- */ - -/* - * This is a big hack right now, but it may turn into something real - * someday. - * - * For the 8xx boards (at this time anyway), there is nothing to initialize - * associated the PROM. Rather than include all of the prom.c - * functions in the image just to get prom_init, all we really need right - * now is the initialization of the physical memory region. - */ -static unsigned long __init -m8xx_find_end_of_memory(void) -{ - bd_t *binfo; - extern unsigned char __res[]; - - binfo = (bd_t *)__res; - - return binfo->bi_memsize; -} - -/* - * Now map in some of the I/O space that is generically needed - * or shared with multiple devices. - * All of this fits into the same 4Mbyte region, so it only - * requires one page table page. (or at least it used to -- paulus) - */ -static void __init -m8xx_map_io(void) -{ - io_block_mapping(IMAP_ADDR, IMAP_ADDR, IMAP_SIZE, _PAGE_IO); -#ifdef CONFIG_MBX - io_block_mapping(NVRAM_ADDR, NVRAM_ADDR, NVRAM_SIZE, _PAGE_IO); - io_block_mapping(MBX_CSR_ADDR, MBX_CSR_ADDR, MBX_CSR_SIZE, _PAGE_IO); - io_block_mapping(PCI_CSR_ADDR, PCI_CSR_ADDR, PCI_CSR_SIZE, _PAGE_IO); - - /* Map some of the PCI/ISA I/O space to get the IDE interface. - */ - io_block_mapping(PCI_ISA_IO_ADDR, PCI_ISA_IO_ADDR, 0x4000, _PAGE_IO); - io_block_mapping(PCI_IDE_ADDR, PCI_IDE_ADDR, 0x4000, _PAGE_IO); -#endif -#if defined(CONFIG_RPXLITE) || defined(CONFIG_RPXCLASSIC) - io_block_mapping(RPX_CSR_ADDR, RPX_CSR_ADDR, RPX_CSR_SIZE, _PAGE_IO); -#if !defined(CONFIG_PCI) - io_block_mapping(_IO_BASE,_IO_BASE,_IO_BASE_SIZE, _PAGE_IO); -#endif -#endif -#if defined(CONFIG_RPXTOUCH) || defined(CONFIG_FB_RPX) - io_block_mapping(HIOX_CSR_ADDR, HIOX_CSR_ADDR, HIOX_CSR_SIZE, _PAGE_IO); -#endif -#ifdef CONFIG_FADS - io_block_mapping(BCSR_ADDR, BCSR_ADDR, BCSR_SIZE, _PAGE_IO); -#endif -#ifdef CONFIG_PCI - io_block_mapping(PCI_CSR_ADDR, PCI_CSR_ADDR, PCI_CSR_SIZE, _PAGE_IO); -#endif -#if defined(CONFIG_NETTA) - io_block_mapping(_IO_BASE,_IO_BASE,_IO_BASE_SIZE, _PAGE_IO); -#endif -} - -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_PCI - m8xx_setup_pci_ptrs(); -#endif - -#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)); - } - - identify_ppc_sys_by_name(BOARD_CHIP_NAME); - - ppc_md.setup_arch = m8xx_setup_arch; - ppc_md.show_percpuinfo = m8xx_show_percpuinfo; - ppc_md.init_IRQ = m8xx_init_IRQ; - ppc_md.get_irq = m8xx_get_irq; - ppc_md.init = NULL; - - ppc_md.restart = m8xx_restart; - ppc_md.power_off = m8xx_power_off; - ppc_md.halt = m8xx_halt; - - ppc_md.time_init = NULL; - ppc_md.set_rtc_time = m8xx_set_rtc_time; - ppc_md.get_rtc_time = m8xx_get_rtc_time; - ppc_md.calibrate_decr = m8xx_calibrate_decr; - - ppc_md.find_end_of_memory = m8xx_find_end_of_memory; - ppc_md.setup_io_mappings = m8xx_map_io; -} |
