f44f961812
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13200 a1c6a512-1295-4272-9138-f99709370657
96 lines
1.8 KiB
C
96 lines
1.8 KiB
C
#include "kernel.h"
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#include "system.h"
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#include "panic.h"
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#include "lcd.h"
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#include <stdio.h>
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const int TIMER4_MASK = (1 << 14);
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const int LCD_MASK = (1 << 16);
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const int DMA0_MASK = (1 << 17);
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const int DMA1_MASK = (1 << 18);
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const int DMA2_MASK = (1 << 19);
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const int DMA3_MASK = (1 << 20);
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int system_memory_guard(int newmode)
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{
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(void)newmode;
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return 0;
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}
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extern void timer4(void);
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extern void dma0(void);
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extern void dma1(void);
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extern void dma3(void);
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void irq(void)
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{
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int intpending = INTPND;
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SRCPND = intpending; /* Clear this interrupt. */
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INTPND = intpending; /* Clear this interrupt. */
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/* Timer 4 */
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if ((intpending & TIMER4_MASK) != 0)
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timer4();
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else if ((intpending & DMA0_MASK) != 0)
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dma0();
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else
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{
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/* unexpected interrupt */
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}
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}
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void system_reboot(void)
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{
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WTCON = 0;
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WTCNT = WTDAT = 1 ;
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WTCON = 0x21;
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for(;;)
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;
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}
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void system_init(void)
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{
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/* Turn off un-needed devices */
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/* Turn off all of the UARTS */
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CLKCON &= ~( (1<<10) | (1<<11) |(1<<12) );
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/* Turn off AC97 and Camera */
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CLKCON &= ~( (1<<19) | (1<<20) );
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/* Turn off USB host */
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CLKCON &= ~(1 << 6);
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/* Turn off NAND flash controller */
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CLKCON &= ~(1 << 4);
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}
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#ifdef HAVE_ADJUSTABLE_CPU_FREQ
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void set_cpu_frequency(long frequency)
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{
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if (frequency == CPUFREQ_MAX)
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{
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asm volatile("mov r0, #0\n"
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"mrc p15, 0, r0, c1, c0, 0\n"
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"orr r0, r0, #3<<30\n" /* set to Asynchronous mode*/
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"mcr p15, 0, r0, c1, c0, 0" : : : "r0");
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FREQ = CPUFREQ_MAX;
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}
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else
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{
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asm volatile("mov r0, #0\n"
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"mrc p15, 0, r0, c1, c0, 0\n"
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"bic r0, r0, #3<<30\n" /* set to FastBus mode*/
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"mcr p15, 0, r0, c1, c0, 0" : : : "r0");
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FREQ = CPUFREQ_NORMAL;
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}
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}
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#endif
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