4bd97c6535
Merge the x1000 and jz47xx exception handling code since they use the same exception vectors and handlers. The interrupt handler is now called from the common exception vector, but remains separate for each board since they have different IRQ layouts. The new exception handler can provide a stack traceback from the interrupted code, rather than the (uninteresting) caller traceback displayed by panicf. This allows you to see what led up to a null pointer deref or division by zero, which makes it _much_ easier to track down errors that occur in common leaf functions like strcmp. Change-Id: I59a0ebb5e40fcb36505c3bfdb47f8cac2f9936b1
147 lines
4.4 KiB
C
147 lines
4.4 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2008 by Maurus Cuelenaere
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef __SYSTEM_TARGET_H_
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#define __SYSTEM_TARGET_H_
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#include <inttypes.h>
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#include "config.h"
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#include "cpu.h"
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#include "mipsregs.h"
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#include "system-mips.h"
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#define CACHE_SIZE 16*1024
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#define CACHEALIGN_BITS 5
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#include "mmu-mips.h"
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#define CFG_UART_BASE UART1_BASE /* Base of the UART channel */
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/* no optimized byteswap functions implemented for mips, yet */
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#define NEED_GENERIC_BYTESWAPS
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#define STORAGE_WANTS_ALIGN
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#define STORAGE_NEEDS_BOUNCE_BUFFER
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/* This one returns the old status */
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static inline int set_interrupt_status(int status, int mask)
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{
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unsigned int res, oldstatus;
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res = oldstatus = read_c0_status();
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res &= ~mask;
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res |= (status & mask);
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write_c0_status(res);
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return oldstatus;
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}
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static inline void enable_interrupt(void)
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{
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/* Set IE bit */
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set_c0_status(ST0_IE);
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}
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static inline void disable_interrupt(void)
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{
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/* Clear IE bit */
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clear_c0_status(ST0_IE);
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}
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static inline int disable_interrupt_save(int mask)
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{
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return set_interrupt_status(0, mask);
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}
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static inline void restore_interrupt(int status)
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{
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write_c0_status(status);
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}
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#define disable_irq() disable_interrupt()
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#define enable_irq() enable_interrupt()
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#define HIGHEST_IRQ_LEVEL 0
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#define set_irq_level(status) set_interrupt_status((status), ST0_IE)
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#define disable_irq_save() disable_interrupt_save(ST0_IE)
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#define restore_irq(c0_status) restore_interrupt(c0_status)
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#define UNCACHED_ADDRESS(addr) ((unsigned int)(addr) | 0xA0000000)
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#define UNCACHED_ADDR(x) UNCACHED_ADDRESS((x))
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#define PHYSADDR(x) ((x) & 0x1fffffff)
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#define VIRTADDR(x) ((x) | 0xA0000000)
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void system_enable_irq(unsigned int irq);
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void udelay(unsigned int usec);
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void mdelay(unsigned int msec);
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void dma_enable(void);
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void dma_disable(void);
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#if CONFIG_CPU == JZ4732
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#define DMA_AIC_TX_CHANNEL 0
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#define DMA_NAND_CHANNEL 1
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#define DMA_USB_CHANNEL 2
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#define DMA_LCD_CHANNEL 3
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#elif CONFIG_CPU == JZ4760B
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#define DMA_AIC_TX_CHANNEL 0
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#define DMA_USB_CHANNEL 1
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// Note: channel 5 and 11 cannot be used!
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#define DMA_SD_RX_CHANNEL0 6
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#define DMA_SD_RX_CHANNEL1 7
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#define DMA_SD_TX_CHANNEL0 8
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#define DMA_SD_TX_CHANNEL1 9
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#define DMA_NAND_CHANNEL 10
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#define DMA_SD_RX_CHANNEL(n) 6+n
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#define DMA_SD_TX_CHANNEL(n) 8+n
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#endif
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#define XDMA_CALLBACK(n) DMA ## n
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#define DMA_CALLBACK(n) XDMA_CALLBACK(n)
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#define DMA_IRQ(n) (IRQ_DMA_0 + (n))
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#define GPIO_IRQ(n) (IRQ_GPIO_0 + (n))
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/*---------------------------------------------------------------------------
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* Put core in a power-saving state.
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*---------------------------------------------------------------------------
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*/
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static inline void core_sleep(void)
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{
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#if CONFIG_CPU == JZ4732 || CONFIG_CPU == JZ4760B
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__cpm_idle_mode();
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#endif
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asm volatile(
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".set push \n"
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".set mips32r2 \n"
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".set noreorder \n"
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"mfc0 $8, $12 \n" /* mfc t0, $12 */
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"move $9, $8 \n" /* move t1, t0 */
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"la $10, 0x8000000 \n" /* la t2, 0x8000000 */
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"or $8, $8, $10 \n" /* Enable reduced power mode */
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"mtc0 $8, $12 \n" /* mtc t0, $12 */
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"wait \n"
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"mtc0 $9, $12 \n" /* mtc t1, $12 */
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".set pop \n"
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::: "t0", "t1", "t2"
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);
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enable_irq();
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}
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#endif /* __SYSTEM_TARGET_H_ */
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