mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 19:36:39 +07:00
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!
230 lines
5.6 KiB
C
230 lines
5.6 KiB
C
/*
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* arch/m68k/mvme147/config.c
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*
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* Copyright (C) 1996 Dave Frascone [chaos@mindspring.com]
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* Cloned from Richard Hirst [richard@sleepie.demon.co.uk]
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*
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* Based on:
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*
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* Copyright (C) 1993 Hamish Macdonald
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file README.legal in the main directory of this archive
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* for more details.
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/tty.h>
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#include <linux/console.h>
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#include <linux/linkage.h>
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#include <linux/init.h>
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#include <linux/major.h>
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#include <linux/genhd.h>
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#include <linux/rtc.h>
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#include <linux/interrupt.h>
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#include <asm/bootinfo.h>
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#include <asm/system.h>
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#include <asm/pgtable.h>
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#include <asm/setup.h>
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#include <asm/irq.h>
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#include <asm/traps.h>
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#include <asm/rtc.h>
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#include <asm/machdep.h>
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#include <asm/mvme147hw.h>
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extern irqreturn_t mvme147_process_int (int level, struct pt_regs *regs);
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extern void mvme147_init_IRQ (void);
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extern void mvme147_free_irq (unsigned int, void *);
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extern int show_mvme147_interrupts (struct seq_file *, void *);
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extern void mvme147_enable_irq (unsigned int);
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extern void mvme147_disable_irq (unsigned int);
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static void mvme147_get_model(char *model);
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static int mvme147_get_hardware_list(char *buffer);
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extern int mvme147_request_irq (unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *), unsigned long flags, const char *devname, void *dev_id);
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extern void mvme147_sched_init(irqreturn_t (*handler)(int, void *, struct pt_regs *));
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extern unsigned long mvme147_gettimeoffset (void);
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extern int mvme147_hwclk (int, struct rtc_time *);
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extern int mvme147_set_clock_mmss (unsigned long);
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extern void mvme147_reset (void);
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extern void mvme147_waitbut(void);
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static int bcd2int (unsigned char b);
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/* Save tick handler routine pointer, will point to do_timer() in
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* kernel/sched.c, called via mvme147_process_int() */
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irqreturn_t (*tick_handler)(int, void *, struct pt_regs *);
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int mvme147_parse_bootinfo(const struct bi_record *bi)
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{
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if (bi->tag == BI_VME_TYPE || bi->tag == BI_VME_BRDINFO)
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return 0;
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else
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return 1;
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}
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void mvme147_reset(void)
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{
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printk ("\r\n\nCalled mvme147_reset\r\n");
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m147_pcc->watchdog = 0x0a; /* Clear timer */
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m147_pcc->watchdog = 0xa5; /* Enable watchdog - 100ms to reset */
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while (1)
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;
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}
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static void mvme147_get_model(char *model)
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{
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sprintf(model, "Motorola MVME147");
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}
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static int mvme147_get_hardware_list(char *buffer)
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{
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*buffer = '\0';
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return 0;
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}
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void __init config_mvme147(void)
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{
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mach_max_dma_address = 0x01000000;
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mach_sched_init = mvme147_sched_init;
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mach_init_IRQ = mvme147_init_IRQ;
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mach_gettimeoffset = mvme147_gettimeoffset;
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mach_hwclk = mvme147_hwclk;
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mach_set_clock_mmss = mvme147_set_clock_mmss;
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mach_reset = mvme147_reset;
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mach_free_irq = mvme147_free_irq;
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mach_process_int = mvme147_process_int;
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mach_get_irq_list = show_mvme147_interrupts;
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mach_request_irq = mvme147_request_irq;
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enable_irq = mvme147_enable_irq;
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disable_irq = mvme147_disable_irq;
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mach_get_model = mvme147_get_model;
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mach_get_hardware_list = mvme147_get_hardware_list;
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/* Board type is only set by newer versions of vmelilo/tftplilo */
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if (!vme_brdtype)
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vme_brdtype = VME_TYPE_MVME147;
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}
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/* Using pcc tick timer 1 */
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static irqreturn_t mvme147_timer_int (int irq, void *dev_id, struct pt_regs *fp)
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{
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m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR;
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m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1;
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return tick_handler(irq, dev_id, fp);
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}
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void mvme147_sched_init (irqreturn_t (*timer_routine)(int, void *, struct pt_regs *))
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{
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tick_handler = timer_routine;
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request_irq (PCC_IRQ_TIMER1, mvme147_timer_int,
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IRQ_FLG_REPLACE, "timer 1", NULL);
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/* Init the clock with a value */
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/* our clock goes off every 6.25us */
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m147_pcc->t1_preload = PCC_TIMER_PRELOAD;
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m147_pcc->t1_cntrl = 0x0; /* clear timer */
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m147_pcc->t1_cntrl = 0x3; /* start timer */
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m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR; /* clear pending ints */
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m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1;
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}
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/* This is always executed with interrupts disabled. */
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/* XXX There are race hazards in this code XXX */
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unsigned long mvme147_gettimeoffset (void)
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{
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volatile unsigned short *cp = (volatile unsigned short *)0xfffe1012;
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unsigned short n;
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n = *cp;
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while (n != *cp)
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n = *cp;
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n -= PCC_TIMER_PRELOAD;
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return (unsigned long)n * 25 / 4;
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}
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static int bcd2int (unsigned char b)
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{
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return ((b>>4)*10 + (b&15));
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}
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int mvme147_hwclk(int op, struct rtc_time *t)
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{
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#warning check me!
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if (!op) {
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m147_rtc->ctrl = RTC_READ;
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t->tm_year = bcd2int (m147_rtc->bcd_year);
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t->tm_mon = bcd2int (m147_rtc->bcd_mth);
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t->tm_mday = bcd2int (m147_rtc->bcd_dom);
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t->tm_hour = bcd2int (m147_rtc->bcd_hr);
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t->tm_min = bcd2int (m147_rtc->bcd_min);
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t->tm_sec = bcd2int (m147_rtc->bcd_sec);
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m147_rtc->ctrl = 0;
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}
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return 0;
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}
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int mvme147_set_clock_mmss (unsigned long nowtime)
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{
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return 0;
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}
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/*------------------- Serial console stuff ------------------------*/
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static void scc_delay (void)
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{
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int n;
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volatile int trash;
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for (n = 0; n < 20; n++)
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trash = n;
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}
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static void scc_write (char ch)
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{
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volatile char *p = (volatile char *)M147_SCC_A_ADDR;
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do {
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scc_delay();
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}
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while (!(*p & 4));
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scc_delay();
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*p = 8;
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scc_delay();
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*p = ch;
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}
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void m147_scc_write (struct console *co, const char *str, unsigned count)
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{
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unsigned long flags;
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local_irq_save(flags);
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while (count--)
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{
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if (*str == '\n')
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scc_write ('\r');
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scc_write (*str++);
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}
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local_irq_restore(flags);
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}
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void mvme147_init_console_port (struct console *co, int cflag)
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{
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co->write = m147_scc_write;
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}
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