mirror of https://gitee.com/openkylin/linux.git
117 lines
3.0 KiB
C
117 lines
3.0 KiB
C
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/***************************************************************************/
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/*
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* linux/arch/m68knommu/platform/5206/config.c
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*
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* Copyright (C) 1999-2002, Greg Ungerer (gerg@snapgear.com)
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* Copyright (C) 2000-2001, Lineo Inc. (www.lineo.com)
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*/
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/***************************************************************************/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/param.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <asm/irq.h>
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#include <asm/dma.h>
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#include <asm/traps.h>
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#include <asm/machdep.h>
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#include <asm/coldfire.h>
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#include <asm/mcftimer.h>
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#include <asm/mcfsim.h>
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#include <asm/mcfdma.h>
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/***************************************************************************/
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void coldfire_tick(void);
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void coldfire_timer_init(irqreturn_t (*handler)(int, void *, struct pt_regs *));
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unsigned long coldfire_timer_offset(void);
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void coldfire_trap_init(void);
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void coldfire_reset(void);
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/***************************************************************************/
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/*
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* DMA channel base address table.
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*/
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unsigned int dma_base_addr[MAX_M68K_DMA_CHANNELS] = {
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MCF_MBAR + MCFDMA_BASE0,
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MCF_MBAR + MCFDMA_BASE1,
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};
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unsigned int dma_device_address[MAX_M68K_DMA_CHANNELS];
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/***************************************************************************/
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void mcf_autovector(unsigned int vec)
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{
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volatile unsigned char *mbar;
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unsigned char icr;
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if ((vec >= 25) && (vec <= 31)) {
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vec -= 25;
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mbar = (volatile unsigned char *) MCF_MBAR;
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icr = MCFSIM_ICR_AUTOVEC | (vec << 3);
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*(mbar + MCFSIM_ICR1 + vec) = icr;
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vec = 0x1 << (vec + 1);
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mcf_setimr(mcf_getimr() & ~vec);
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}
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}
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/***************************************************************************/
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void mcf_settimericr(unsigned int timer, unsigned int level)
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{
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volatile unsigned char *icrp;
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unsigned int icr, imr;
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if (timer <= 2) {
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switch (timer) {
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case 2: icr = MCFSIM_TIMER2ICR; imr = MCFSIM_IMR_TIMER2; break;
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default: icr = MCFSIM_TIMER1ICR; imr = MCFSIM_IMR_TIMER1; break;
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}
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icrp = (volatile unsigned char *) (MCF_MBAR + icr);
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*icrp = MCFSIM_ICR_AUTOVEC | (level << 2) | MCFSIM_ICR_PRI3;
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mcf_setimr(mcf_getimr() & ~imr);
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}
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}
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/***************************************************************************/
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int mcf_timerirqpending(int timer)
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{
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unsigned int imr = 0;
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switch (timer) {
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case 1: imr = MCFSIM_IMR_TIMER1; break;
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case 2: imr = MCFSIM_IMR_TIMER2; break;
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default: break;
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}
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return (mcf_getipr() & imr);
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}
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/***************************************************************************/
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void config_BSP(char *commandp, int size)
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{
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mcf_setimr(MCFSIM_IMR_MASKALL);
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#if defined(CONFIG_BOOTPARAM)
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strncpy(commandp, CONFIG_BOOTPARAM_STRING, size);
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commandp[size-1] = 0;
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#else
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memset(commandp, 0, size);
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#endif
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mach_sched_init = coldfire_timer_init;
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mach_tick = coldfire_tick;
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mach_gettimeoffset = coldfire_timer_offset;
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mach_trap_init = coldfire_trap_init;
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mach_reset = coldfire_reset;
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}
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/***************************************************************************/
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