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!
815 lines
19 KiB
C
815 lines
19 KiB
C
/*
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* arch/ppc/platforms/apus_setup.c
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*
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* Copyright (C) 1998, 1999 Jesper Skov
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*
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* Basically what is needed to replace functionality found in
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* arch/m68k allowing Amiga drivers to work under APUS.
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* Bits of code and/or ideas from arch/m68k and arch/ppc files.
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*
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* TODO:
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* This file needs a *really* good cleanup. Restructure and optimize.
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* Make sure it can be compiled for non-APUS configs. Begin to move
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* Amiga specific stuff into mach/amiga.
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*/
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/init.h>
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#include <linux/initrd.h>
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#include <linux/seq_file.h>
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/* Needs INITSERIAL call in head.S! */
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#undef APUS_DEBUG
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#include <asm/bootinfo.h>
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#include <asm/setup.h>
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#include <asm/amigahw.h>
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#include <asm/amigaints.h>
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#include <asm/amigappc.h>
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#include <asm/pgtable.h>
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#include <asm/dma.h>
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#include <asm/machdep.h>
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#include <asm/time.h>
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unsigned long m68k_machtype;
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char debug_device[6] = "";
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extern void amiga_init_IRQ(void);
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extern void apus_setup_pci_ptrs(void);
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void (*mach_sched_init) (void (*handler)(int, void *, struct pt_regs *)) __initdata = NULL;
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/* machine dependent irq functions */
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void (*mach_init_IRQ) (void) __initdata = NULL;
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void (*(*mach_default_handler)[]) (int, void *, struct pt_regs *) = NULL;
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void (*mach_get_model) (char *model) = NULL;
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int (*mach_get_hardware_list) (char *buffer) = NULL;
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int (*mach_get_irq_list) (struct seq_file *, void *) = NULL;
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void (*mach_process_int) (int, struct pt_regs *) = NULL;
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/* machine dependent timer functions */
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unsigned long (*mach_gettimeoffset) (void);
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void (*mach_gettod) (int*, int*, int*, int*, int*, int*);
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int (*mach_hwclk) (int, struct hwclk_time*) = NULL;
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int (*mach_set_clock_mmss) (unsigned long) = NULL;
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void (*mach_reset)( void );
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long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
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#if defined(CONFIG_AMIGA_FLOPPY)
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void (*mach_floppy_setup) (char *, int *) __initdata = NULL;
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#endif
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#ifdef CONFIG_HEARTBEAT
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void (*mach_heartbeat) (int) = NULL;
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extern void apus_heartbeat (void);
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#endif
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extern unsigned long amiga_model;
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extern unsigned decrementer_count;/* count value for 1e6/HZ microseconds */
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extern unsigned count_period_num; /* 1 decrementer count equals */
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extern unsigned count_period_den; /* count_period_num / count_period_den us */
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int num_memory = 0;
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struct mem_info memory[NUM_MEMINFO];/* memory description */
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/* FIXME: Duplicate memory data to avoid conflicts with m68k shared code. */
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int m68k_realnum_memory = 0;
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struct mem_info m68k_memory[NUM_MEMINFO];/* memory description */
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struct mem_info ramdisk;
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extern void amiga_floppy_setup(char *, int *);
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extern void config_amiga(void);
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static int __60nsram = 0;
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/* for cpuinfo */
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static int __bus_speed = 0;
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static int __speed_test_failed = 0;
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/********************************************** COMPILE PROTECTION */
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/* Provide some stubs that links to Amiga specific functions.
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* This allows CONFIG_APUS to be removed from generic PPC files while
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* preventing link errors for other PPC targets.
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*/
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unsigned long apus_get_rtc_time(void)
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{
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#ifdef CONFIG_APUS
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extern unsigned long m68k_get_rtc_time(void);
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return m68k_get_rtc_time ();
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#else
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return 0;
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#endif
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}
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int apus_set_rtc_time(unsigned long nowtime)
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{
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#ifdef CONFIG_APUS
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extern int m68k_set_rtc_time(unsigned long nowtime);
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return m68k_set_rtc_time (nowtime);
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#else
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return 0;
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#endif
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}
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/*********************************************************** SETUP */
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/* From arch/m68k/kernel/setup.c. */
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void __init apus_setup_arch(void)
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{
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#ifdef CONFIG_APUS
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extern char cmd_line[];
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int i;
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char *p, *q;
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/* Let m68k-shared code know it should do the Amiga thing. */
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m68k_machtype = MACH_AMIGA;
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/* Parse the command line for arch-specific options.
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* For the m68k, this is currently only "debug=xxx" to enable printing
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* certain kernel messages to some machine-specific device. */
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for( p = cmd_line; p && *p; ) {
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i = 0;
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if (!strncmp( p, "debug=", 6 )) {
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strlcpy( debug_device, p+6, sizeof(debug_device) );
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if ((q = strchr( debug_device, ' ' ))) *q = 0;
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i = 1;
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} else if (!strncmp( p, "60nsram", 7 )) {
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APUS_WRITE (APUS_REG_WAITSTATE,
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REGWAITSTATE_SETRESET
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|REGWAITSTATE_PPCR
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|REGWAITSTATE_PPCW);
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__60nsram = 1;
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i = 1;
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}
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if (i) {
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/* option processed, delete it */
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if ((q = strchr( p, ' ' )))
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strcpy( p, q+1 );
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else
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*p = 0;
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} else {
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if ((p = strchr( p, ' ' ))) ++p;
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}
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}
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config_amiga();
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#if 0 /* Enable for logging - also include logging.o in Makefile rule */
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{
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#define LOG_SIZE 4096
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void* base;
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/* Throw away some memory - the P5 firmare stomps on top
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* of CHIP memory during bootup.
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*/
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amiga_chip_alloc(0x1000);
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base = amiga_chip_alloc(LOG_SIZE+sizeof(klog_data_t));
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LOG_INIT(base, base+sizeof(klog_data_t), LOG_SIZE);
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}
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#endif
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#endif
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}
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int
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apus_show_cpuinfo(struct seq_file *m)
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{
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extern int __map_without_bats;
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extern unsigned long powerup_PCI_present;
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seq_printf(m, "machine\t\t: Amiga\n");
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seq_printf(m, "bus speed\t: %d%s", __bus_speed,
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(__speed_test_failed) ? " [failed]\n" : "\n");
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seq_printf(m, "using BATs\t: %s\n",
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(__map_without_bats) ? "No" : "Yes");
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seq_printf(m, "ram speed\t: %dns\n", (__60nsram) ? 60 : 70);
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seq_printf(m, "PCI bridge\t: %s\n",
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(powerup_PCI_present) ? "Yes" : "No");
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return 0;
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}
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static void get_current_tb(unsigned long long *time)
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{
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__asm __volatile ("1:mftbu 4 \n\t"
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" mftb 5 \n\t"
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" mftbu 6 \n\t"
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" cmpw 4,6 \n\t"
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" bne 1b \n\t"
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" stw 4,0(%0)\n\t"
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" stw 5,4(%0)\n\t"
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:
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: "r" (time)
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: "r4", "r5", "r6");
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}
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void apus_calibrate_decr(void)
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{
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#ifdef CONFIG_APUS
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unsigned long freq;
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/* This algorithm for determining the bus speed was
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contributed by Ralph Schmidt. */
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unsigned long long start, stop;
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int bus_speed;
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int speed_test_failed = 0;
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{
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unsigned long loop = amiga_eclock / 10;
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get_current_tb (&start);
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while (loop--) {
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unsigned char tmp;
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tmp = ciaa.pra;
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}
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get_current_tb (&stop);
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}
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bus_speed = (((unsigned long)(stop-start))*10*4) / 1000000;
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if (AMI_1200 == amiga_model)
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bus_speed /= 2;
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if ((bus_speed >= 47) && (bus_speed < 53)) {
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bus_speed = 50;
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freq = 12500000;
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} else if ((bus_speed >= 57) && (bus_speed < 63)) {
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bus_speed = 60;
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freq = 15000000;
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} else if ((bus_speed >= 63) && (bus_speed < 69)) {
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bus_speed = 67;
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freq = 16666667;
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} else {
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printk ("APUS: Unable to determine bus speed (%d). "
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"Defaulting to 50MHz", bus_speed);
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bus_speed = 50;
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freq = 12500000;
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speed_test_failed = 1;
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}
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/* Ease diagnostics... */
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{
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extern int __map_without_bats;
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extern unsigned long powerup_PCI_present;
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printk ("APUS: BATs=%d, BUS=%dMHz",
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(__map_without_bats) ? 0 : 1,
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bus_speed);
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if (speed_test_failed)
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printk ("[FAILED - please report]");
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printk (", RAM=%dns, PCI bridge=%d\n",
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(__60nsram) ? 60 : 70,
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(powerup_PCI_present) ? 1 : 0);
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/* print a bit more if asked politely... */
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if (!(ciaa.pra & 0x40)){
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extern unsigned int bat_addrs[4][3];
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int b;
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for (b = 0; b < 4; ++b) {
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printk ("APUS: BAT%d ", b);
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printk ("%08x-%08x -> %08x\n",
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bat_addrs[b][0],
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bat_addrs[b][1],
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bat_addrs[b][2]);
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}
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}
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}
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printk("time_init: decrementer frequency = %lu.%.6lu MHz\n",
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freq/1000000, freq%1000000);
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tb_ticks_per_jiffy = freq / HZ;
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tb_to_us = mulhwu_scale_factor(freq, 1000000);
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__bus_speed = bus_speed;
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__speed_test_failed = speed_test_failed;
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#endif
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}
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void arch_gettod(int *year, int *mon, int *day, int *hour,
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int *min, int *sec)
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{
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#ifdef CONFIG_APUS
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if (mach_gettod)
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mach_gettod(year, mon, day, hour, min, sec);
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else
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*year = *mon = *day = *hour = *min = *sec = 0;
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#endif
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}
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/* for "kbd-reset" cmdline param */
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__init
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void kbd_reset_setup(char *str, int *ints)
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{
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}
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/*********************************************************** FLOPPY */
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#if defined(CONFIG_AMIGA_FLOPPY)
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__init
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void floppy_setup(char *str, int *ints)
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{
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if (mach_floppy_setup)
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mach_floppy_setup (str, ints);
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}
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#endif
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/*********************************************************** MEMORY */
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#define KMAP_MAX 32
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unsigned long kmap_chunks[KMAP_MAX*3];
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int kmap_chunk_count = 0;
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/* From pgtable.h */
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static __inline__ pte_t *my_find_pte(struct mm_struct *mm,unsigned long va)
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{
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pgd_t *dir = 0;
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pmd_t *pmd = 0;
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pte_t *pte = 0;
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va &= PAGE_MASK;
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dir = pgd_offset( mm, va );
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if (dir)
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{
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pmd = pmd_offset(dir, va & PAGE_MASK);
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if (pmd && pmd_present(*pmd))
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{
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pte = pte_offset(pmd, va);
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}
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}
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return pte;
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}
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/* Again simulating an m68k/mm/kmap.c function. */
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void kernel_set_cachemode( unsigned long address, unsigned long size,
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unsigned int cmode )
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{
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unsigned long mask, flags;
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switch (cmode)
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{
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case IOMAP_FULL_CACHING:
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mask = ~(_PAGE_NO_CACHE | _PAGE_GUARDED);
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flags = 0;
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break;
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case IOMAP_NOCACHE_SER:
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mask = ~0;
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flags = (_PAGE_NO_CACHE | _PAGE_GUARDED);
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break;
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default:
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panic ("kernel_set_cachemode() doesn't support mode %d\n",
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cmode);
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break;
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}
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size /= PAGE_SIZE;
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address &= PAGE_MASK;
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while (size--)
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{
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pte_t *pte;
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pte = my_find_pte(&init_mm, address);
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if ( !pte )
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{
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printk("pte NULL in kernel_set_cachemode()\n");
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return;
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}
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pte_val (*pte) &= mask;
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pte_val (*pte) |= flags;
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flush_tlb_page(find_vma(&init_mm,address),address);
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address += PAGE_SIZE;
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}
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}
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unsigned long mm_ptov (unsigned long paddr)
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{
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unsigned long ret;
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if (paddr < 16*1024*1024)
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ret = ZTWO_VADDR(paddr);
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else {
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int i;
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for (i = 0; i < kmap_chunk_count;){
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unsigned long phys = kmap_chunks[i++];
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unsigned long size = kmap_chunks[i++];
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unsigned long virt = kmap_chunks[i++];
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if (paddr >= phys
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&& paddr < (phys + size)){
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ret = virt + paddr - phys;
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goto exit;
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}
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}
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ret = (unsigned long) __va(paddr);
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}
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exit:
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#ifdef DEBUGPV
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printk ("PTOV(%lx)=%lx\n", paddr, ret);
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#endif
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return ret;
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}
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int mm_end_of_chunk (unsigned long addr, int len)
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{
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if (memory[0].addr + memory[0].size == addr + len)
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return 1;
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return 0;
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}
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/*********************************************************** CACHE */
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#define L1_CACHE_BYTES 32
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#define MAX_CACHE_SIZE 8192
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void cache_push(__u32 addr, int length)
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{
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addr = mm_ptov(addr);
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if (MAX_CACHE_SIZE < length)
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length = MAX_CACHE_SIZE;
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while(length > 0){
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__asm ("dcbf 0,%0\n\t"
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: : "r" (addr));
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addr += L1_CACHE_BYTES;
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length -= L1_CACHE_BYTES;
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}
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/* Also flush trailing block */
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__asm ("dcbf 0,%0\n\t"
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"sync \n\t"
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: : "r" (addr));
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}
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void cache_clear(__u32 addr, int length)
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{
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if (MAX_CACHE_SIZE < length)
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length = MAX_CACHE_SIZE;
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addr = mm_ptov(addr);
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__asm ("dcbf 0,%0\n\t"
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"sync \n\t"
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"icbi 0,%0 \n\t"
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"isync \n\t"
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: : "r" (addr));
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addr += L1_CACHE_BYTES;
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length -= L1_CACHE_BYTES;
|
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|
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while(length > 0){
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__asm ("dcbf 0,%0\n\t"
|
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"sync \n\t"
|
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"icbi 0,%0 \n\t"
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"isync \n\t"
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: : "r" (addr));
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addr += L1_CACHE_BYTES;
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length -= L1_CACHE_BYTES;
|
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}
|
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|
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__asm ("dcbf 0,%0\n\t"
|
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"sync \n\t"
|
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"icbi 0,%0 \n\t"
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"isync \n\t"
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: : "r" (addr));
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}
|
|
|
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/****************************************************** from setup.c */
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void
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apus_restart(char *cmd)
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{
|
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local_irq_disable();
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|
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APUS_WRITE(APUS_REG_LOCK,
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REGLOCK_BLACKMAGICK1|REGLOCK_BLACKMAGICK2);
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APUS_WRITE(APUS_REG_LOCK,
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REGLOCK_BLACKMAGICK1|REGLOCK_BLACKMAGICK3);
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APUS_WRITE(APUS_REG_LOCK,
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REGLOCK_BLACKMAGICK2|REGLOCK_BLACKMAGICK3);
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APUS_WRITE(APUS_REG_SHADOW, REGSHADOW_SELFRESET);
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APUS_WRITE(APUS_REG_RESET, REGRESET_AMIGARESET);
|
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for(;;);
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}
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|
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void
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apus_power_off(void)
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{
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for (;;);
|
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}
|
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|
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void
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apus_halt(void)
|
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{
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apus_restart(NULL);
|
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}
|
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|
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/****************************************************** IRQ stuff */
|
|
|
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static unsigned char last_ipl[8];
|
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|
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int apus_get_irq(struct pt_regs* regs)
|
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{
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unsigned char ipl_emu, mask;
|
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unsigned int level;
|
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|
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APUS_READ(APUS_IPL_EMU, ipl_emu);
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level = (ipl_emu >> 3) & IPLEMU_IPLMASK;
|
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mask = IPLEMU_SETRESET|IPLEMU_DISABLEINT|level;
|
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level ^= 7;
|
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|
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/* Save previous IPL value */
|
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if (last_ipl[level])
|
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return -2;
|
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last_ipl[level] = ipl_emu;
|
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|
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/* Set to current IPL value */
|
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APUS_WRITE(APUS_IPL_EMU, mask);
|
|
APUS_WRITE(APUS_IPL_EMU, IPLEMU_DISABLEINT|level);
|
|
|
|
|
|
#ifdef __INTERRUPT_DEBUG
|
|
printk("<%d:%d>", level, ~ipl_emu & IPLEMU_IPLMASK);
|
|
#endif
|
|
return level + IRQ_AMIGA_AUTO;
|
|
}
|
|
|
|
void apus_end_irq(unsigned int irq)
|
|
{
|
|
unsigned char ipl_emu;
|
|
unsigned int level = irq - IRQ_AMIGA_AUTO;
|
|
#ifdef __INTERRUPT_DEBUG
|
|
printk("{%d}", ~last_ipl[level] & IPLEMU_IPLMASK);
|
|
#endif
|
|
/* Restore IPL to the previous value */
|
|
ipl_emu = last_ipl[level] & IPLEMU_IPLMASK;
|
|
APUS_WRITE(APUS_IPL_EMU, IPLEMU_SETRESET|IPLEMU_DISABLEINT|ipl_emu);
|
|
last_ipl[level] = 0;
|
|
ipl_emu ^= 7;
|
|
APUS_WRITE(APUS_IPL_EMU, IPLEMU_DISABLEINT|ipl_emu);
|
|
}
|
|
|
|
/****************************************************** debugging */
|
|
|
|
/* some serial hardware definitions */
|
|
#define SDR_OVRUN (1<<15)
|
|
#define SDR_RBF (1<<14)
|
|
#define SDR_TBE (1<<13)
|
|
#define SDR_TSRE (1<<12)
|
|
|
|
#define AC_SETCLR (1<<15)
|
|
#define AC_UARTBRK (1<<11)
|
|
|
|
#define SER_DTR (1<<7)
|
|
#define SER_RTS (1<<6)
|
|
#define SER_DCD (1<<5)
|
|
#define SER_CTS (1<<4)
|
|
#define SER_DSR (1<<3)
|
|
|
|
static __inline__ void ser_RTSon(void)
|
|
{
|
|
ciab.pra &= ~SER_RTS; /* active low */
|
|
}
|
|
|
|
int __debug_ser_out( unsigned char c )
|
|
{
|
|
custom.serdat = c | 0x100;
|
|
mb();
|
|
while (!(custom.serdatr & 0x2000))
|
|
barrier();
|
|
return 1;
|
|
}
|
|
|
|
unsigned char __debug_ser_in( void )
|
|
{
|
|
unsigned char c;
|
|
|
|
/* XXX: is that ok?? derived from amiga_ser.c... */
|
|
while( !(custom.intreqr & IF_RBF) )
|
|
barrier();
|
|
c = custom.serdatr;
|
|
/* clear the interrupt, so that another character can be read */
|
|
custom.intreq = IF_RBF;
|
|
return c;
|
|
}
|
|
|
|
int __debug_serinit( void )
|
|
{
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
|
|
/* turn off Rx and Tx interrupts */
|
|
custom.intena = IF_RBF | IF_TBE;
|
|
|
|
/* clear any pending interrupt */
|
|
custom.intreq = IF_RBF | IF_TBE;
|
|
|
|
local_irq_restore(flags);
|
|
|
|
/*
|
|
* set the appropriate directions for the modem control flags,
|
|
* and clear RTS and DTR
|
|
*/
|
|
ciab.ddra |= (SER_DTR | SER_RTS); /* outputs */
|
|
ciab.ddra &= ~(SER_DCD | SER_CTS | SER_DSR); /* inputs */
|
|
|
|
#ifdef CONFIG_KGDB
|
|
/* turn Rx interrupts on for GDB */
|
|
custom.intena = IF_SETCLR | IF_RBF;
|
|
ser_RTSon();
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
void __debug_print_hex(unsigned long x)
|
|
{
|
|
int i;
|
|
char hexchars[] = "0123456789ABCDEF";
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
__debug_ser_out(hexchars[(x >> 28) & 15]);
|
|
x <<= 4;
|
|
}
|
|
__debug_ser_out('\n');
|
|
__debug_ser_out('\r');
|
|
}
|
|
|
|
void __debug_print_string(char* s)
|
|
{
|
|
unsigned char c;
|
|
while((c = *s++))
|
|
__debug_ser_out(c);
|
|
__debug_ser_out('\n');
|
|
__debug_ser_out('\r');
|
|
}
|
|
|
|
static void apus_progress(char *s, unsigned short value)
|
|
{
|
|
__debug_print_string(s);
|
|
}
|
|
|
|
/****************************************************** init */
|
|
|
|
/* The number of spurious interrupts */
|
|
volatile unsigned int num_spurious;
|
|
|
|
extern struct irqaction amiga_sys_irqaction[AUTO_IRQS];
|
|
|
|
|
|
extern void amiga_enable_irq(unsigned int irq);
|
|
extern void amiga_disable_irq(unsigned int irq);
|
|
|
|
struct hw_interrupt_type amiga_sys_irqctrl = {
|
|
.typename = "Amiga IPL",
|
|
.end = apus_end_irq,
|
|
};
|
|
|
|
struct hw_interrupt_type amiga_irqctrl = {
|
|
.typename = "Amiga ",
|
|
.enable = amiga_enable_irq,
|
|
.disable = amiga_disable_irq,
|
|
};
|
|
|
|
#define HARDWARE_MAPPED_SIZE (512*1024)
|
|
unsigned long __init apus_find_end_of_memory(void)
|
|
{
|
|
int shadow = 0;
|
|
unsigned long total;
|
|
|
|
/* The memory size reported by ADOS excludes the 512KB
|
|
reserved for PPC exception registers and possibly 512KB
|
|
containing a shadow of the ADOS ROM. */
|
|
{
|
|
unsigned long size = memory[0].size;
|
|
|
|
/* If 2MB aligned, size was probably user
|
|
specified. We can't tell anything about shadowing
|
|
in this case so skip shadow assignment. */
|
|
if (0 != (size & 0x1fffff)){
|
|
/* Align to 512KB to ensure correct handling
|
|
of both memfile and system specified
|
|
sizes. */
|
|
size = ((size+0x0007ffff) & 0xfff80000);
|
|
/* If memory is 1MB aligned, assume
|
|
shadowing. */
|
|
shadow = !(size & 0x80000);
|
|
}
|
|
|
|
/* Add the chunk that ADOS does not see. by aligning
|
|
the size to the nearest 2MB limit upwards. */
|
|
memory[0].size = ((size+0x001fffff) & 0xffe00000);
|
|
}
|
|
|
|
ppc_memstart = memory[0].addr;
|
|
ppc_memoffset = PAGE_OFFSET - PPC_MEMSTART;
|
|
total = memory[0].size;
|
|
|
|
/* Remove the memory chunks that are controlled by special
|
|
Phase5 hardware. */
|
|
|
|
/* Remove the upper 512KB if it contains a shadow of
|
|
the ADOS ROM. FIXME: It might be possible to
|
|
disable this shadow HW. Check the booter
|
|
(ppc_boot.c) */
|
|
if (shadow)
|
|
total -= HARDWARE_MAPPED_SIZE;
|
|
|
|
/* Remove the upper 512KB where the PPC exception
|
|
vectors are mapped. */
|
|
total -= HARDWARE_MAPPED_SIZE;
|
|
|
|
/* Linux/APUS only handles one block of memory -- the one on
|
|
the PowerUP board. Other system memory is horrible slow in
|
|
comparison. The user can use other memory for swapping
|
|
using the z2ram device. */
|
|
return total;
|
|
}
|
|
|
|
static void __init
|
|
apus_map_io(void)
|
|
{
|
|
/* Map PPC exception vectors. */
|
|
io_block_mapping(0xfff00000, 0xfff00000, 0x00020000, _PAGE_KERNEL);
|
|
/* Map chip and ZorroII memory */
|
|
io_block_mapping(zTwoBase, 0x00000000, 0x01000000, _PAGE_IO);
|
|
}
|
|
|
|
__init
|
|
void apus_init_IRQ(void)
|
|
{
|
|
struct irqaction *action;
|
|
int i;
|
|
|
|
#ifdef CONFIG_PCI
|
|
apus_setup_pci_ptrs();
|
|
#endif
|
|
|
|
for ( i = 0 ; i < AMI_IRQS; i++ ) {
|
|
irq_desc[i].status = IRQ_LEVEL;
|
|
if (i < IRQ_AMIGA_AUTO) {
|
|
irq_desc[i].handler = &amiga_irqctrl;
|
|
} else {
|
|
irq_desc[i].handler = &amiga_sys_irqctrl;
|
|
action = &amiga_sys_irqaction[i-IRQ_AMIGA_AUTO];
|
|
if (action->name)
|
|
setup_irq(i, action);
|
|
}
|
|
}
|
|
|
|
amiga_init_IRQ();
|
|
|
|
}
|
|
|
|
__init
|
|
void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
|
|
unsigned long r6, unsigned long r7)
|
|
{
|
|
extern int parse_bootinfo(const struct bi_record *);
|
|
extern char _end[];
|
|
|
|
/* Parse bootinfo. The bootinfo is located right after
|
|
the kernel bss */
|
|
parse_bootinfo((const struct bi_record *)&_end);
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
/* Take care of initrd if we have one. Use data from
|
|
bootinfo to avoid the need to initialize PPC
|
|
registers when kernel is booted via a PPC reset. */
|
|
if ( ramdisk.addr ) {
|
|
initrd_start = (unsigned long) __va(ramdisk.addr);
|
|
initrd_end = (unsigned long)
|
|
__va(ramdisk.size + ramdisk.addr);
|
|
}
|
|
#endif /* CONFIG_BLK_DEV_INITRD */
|
|
|
|
ISA_DMA_THRESHOLD = 0x00ffffff;
|
|
|
|
ppc_md.setup_arch = apus_setup_arch;
|
|
ppc_md.show_cpuinfo = apus_show_cpuinfo;
|
|
ppc_md.init_IRQ = apus_init_IRQ;
|
|
ppc_md.get_irq = apus_get_irq;
|
|
|
|
#ifdef CONFIG_HEARTBEAT
|
|
ppc_md.heartbeat = apus_heartbeat;
|
|
ppc_md.heartbeat_count = 1;
|
|
#endif
|
|
#ifdef APUS_DEBUG
|
|
__debug_serinit();
|
|
ppc_md.progress = apus_progress;
|
|
#endif
|
|
ppc_md.init = NULL;
|
|
|
|
ppc_md.restart = apus_restart;
|
|
ppc_md.power_off = apus_power_off;
|
|
ppc_md.halt = apus_halt;
|
|
|
|
ppc_md.time_init = NULL;
|
|
ppc_md.set_rtc_time = apus_set_rtc_time;
|
|
ppc_md.get_rtc_time = apus_get_rtc_time;
|
|
ppc_md.calibrate_decr = apus_calibrate_decr;
|
|
|
|
ppc_md.find_end_of_memory = apus_find_end_of_memory;
|
|
ppc_md.setup_io_mappings = apus_map_io;
|
|
}
|