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rockbox/firmware/system.c
Linus Nielsen Feltzing 169cd33b37 iAudio: working PLL settings 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@9104 a1c6a512-1295-4272-9138-f99709370657
2006-03-18 21:29:17 +00:00

1464 lines
44 KiB
C
Raw Blame History

/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Alan Korr
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdio.h>
#include "config.h"
#include <stdbool.h>
#include "lcd.h"
#include "font.h"
#include "system.h"
#include "kernel.h"
#include "timer.h"
#ifndef SIMULATOR
long cpu_frequency = CPU_FREQ;
#endif
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
int boost_counter = 0;
bool cpu_idle = false;
void cpu_boost(bool on_off)
{
if(on_off)
{
/* Boost the frequency if not already boosted */
if(boost_counter++ == 0)
{
set_cpu_frequency(CPUFREQ_MAX);
}
}
else
{
/* Lower the frequency if the counter reaches 0 */
if(--boost_counter == 0)
{
if(cpu_idle)
set_cpu_frequency(CPUFREQ_DEFAULT);
else
set_cpu_frequency(CPUFREQ_NORMAL);
}
/* Safety measure */
if(boost_counter < 0)
boost_counter = 0;
}
}
void cpu_idle_mode(bool on_off)
{
cpu_idle = on_off;
/* We need to adjust the frequency immediately if the CPU
isn't boosted */
if(boost_counter == 0)
{
if(cpu_idle)
set_cpu_frequency(CPUFREQ_DEFAULT);
else
set_cpu_frequency(CPUFREQ_NORMAL);
}
}
#endif
#if CONFIG_CPU == TCC730
void* volatile interrupt_vector[16] __attribute__ ((section(".idata")));
static void ddma_wait_idle(void) __attribute__ ((section (".icode")));
static void ddma_wait_idle(void)
{
/* TODO: power saving trick: set the CPU freq to 22MHz
while doing the busy wait after a disk dma access.
(Used by Archos) */
do {
} while ((DDMACOM & 3) != 0);
}
void ddma_transfer(int dir, int mem, void* intAddr, long extAddr, int num)
__attribute__ ((section (".icode")));
void ddma_transfer(int dir, int mem, void* intAddr, long extAddr, int num) {
int irq = set_irq_level(1);
ddma_wait_idle();
long externalAddress = (long) extAddr;
long internalAddress = ((long) intAddr) & 0xFFFF;
/* HW wants those two in word units. */
num /= 2;
externalAddress /= 2;
DDMACFG = (dir << 1) | (mem << 2);
DDMAIADR = internalAddress;
DDMAEADR = externalAddress;
DDMANUM = num;
DDMACOM |= 0x4; /* start */
ddma_wait_idle(); /* wait for completion */
set_irq_level(irq);
}
static void ddma_wait_idle_noicode(void)
{
do {
} while ((DDMACOM & 3) != 0);
}
static void ddma_transfer_noicode(int dir, int mem, long intAddr, long extAddr, int num) {
int irq = set_irq_level(1);
ddma_wait_idle_noicode();
long externalAddress = (long) extAddr;
long internalAddress = (long) intAddr;
/* HW wants those two in word units. */
num /= 2;
externalAddress /= 2;
DDMACFG = (dir << 1) | (mem << 2);
DDMAIADR = internalAddress;
DDMAEADR = externalAddress;
DDMANUM = num;
DDMACOM |= 0x4; /* start */
ddma_wait_idle_noicode(); /* wait for completion */
set_irq_level(irq);
}
/* Some linker-defined symbols */
extern int icodecopy;
extern int icodesize;
extern int icodestart;
/* change the a PLL frequency */
void set_pll_freq(int pll_index, long freq_out) {
volatile unsigned int* plldata;
volatile unsigned char* pllcon;
if (pll_index == 0) {
plldata = &PLL0DATA;
pllcon = &PLL0CON;
} else {
plldata = &PLL1DATA;
pllcon = &PLL1CON;
}
/* VC0 is 32768 Hz */
#define VC0FREQ (32768L)
unsigned m = (freq_out / VC0FREQ) - 2;
/* TODO: if m is too small here, use the divider bits [0,1] */
*plldata = m << 2;
*pllcon |= 0x1; /* activate */
do {
} while ((*pllcon & 0x2) == 0); /* wait for stabilization */
}
int smsc_version(void) {
int v;
int* smsc_ver_addr = (int*)0x4C20;
__asm__ ("ldc %0, @%1" : "=r"(v) : "a"(smsc_ver_addr));
v &= 0xFF;
if (v < 4 || v == 0xFF) {
return 3;
}
return v;
}
void smsc_delay() {
int i;
/* FIXME: tune the delay.
Delay doesn't depend on CPU speed in Archos' firmware.
*/
for (i = 0; i < 100; i++) {
}
}
static void extra_init(void) {
/* Power on stuff */
P1 |= 0x07;
P1CON |= 0x1f;
/* P5 conf
* lines 0, 1 & 4 are digital, other analog. :
*/
P5CON = 0xec;
P6CON = 0x19;
/* P7 conf
nothing to do: all are inputs
(reset value of the register is good)
*/
/* SMSC chip config (?) */
P10CON |= 0x20;
P6 &= 0xF7;
P10 &= 0x20;
smsc_delay();
if (smsc_version() < 4) {
P6 |= 0x08;
P10 |= 0x20;
}
}
void set_cpu_frequency(long frequency) {
/* Enable SDRAM refresh, at least 15MHz */
if (frequency < cpu_frequency)
MIUDCNT = 0x800 | (frequency * 15/1000000L - 1);
set_pll_freq(0, frequency);
PLL0CON |= 0x4; /* use as CPU clock */
cpu_frequency = frequency;
/* wait states and such not changed by Archos. (!?) */
/* Enable SDRAM refresh, 15MHz. */
MIUDCNT = 0x800 | (frequency * 15/1000000L - 1);
tick_start(1000/HZ);
/* TODO: when uart is done; sync uart freq */
}
/* called by crt0 */
void system_init(void)
{
/* Disable watchdog */
WDTEN = 0xA5;
/****************
* GPIO ports
*/
/* keep alive (?) -- clear the bit to prevent crash at start (??) */
P8 = 0x00;
P8CON = 0x01;
/* smsc chip init (?) */
P10 = 0x20;
P6 = 0x08;
P10CON = 0x20;
P6CON = 0x08;
/********
* CPU
*/
/* PLL0 (cpu osc. frequency) */
/* set_cpu_frequency(CPU_FREQ); */
/*******************
* configure S(D)RAM
*/
/************************
* Copy .icode section to icram
*/
ddma_transfer_noicode(0, 0, 0x40, (long)&icodecopy, (int)&icodesize);
/***************************
* Interrupts
*/
/* priorities ? */
/* mask */
IMR0 = 0;
IMR1 = 0;
/* IRQ0 BT INT */
/* IRQ1 RTC INT */
/* IRQ2 TA INT */
/* IRQ3 TAOV INT */
/* IRQ4 TB INT */
/* IRQ5 TBOV INT */
/* IRQ6 TC INT */
/* IRQ7 TCOV INT */
/* IRQ8 USB INT */
/* IRQ9 PPIC INT */
/* IRQ10 UART_Rx/UART_Err/ UART_tx INT */
/* IRQ11 IIC INT */
/* IRQ12 SIO INT */
/* IRQ13 IIS0 INT */
/* IRQ14 IIS1 INT */
/* IRQ15 <20> */
extra_init();
}
void system_reboot (void)
{
}
int system_memory_guard(int newmode)
{
(void)newmode;
return 0;
}
#elif defined(CPU_COLDFIRE)
#define default_interrupt(name) \
extern __attribute__((weak,alias("UIE"))) void name (void)
static const char* const irqname[] = {
"", "", "AccessErr","AddrErr","IllInstr", "", "","",
"PrivVio","Trace","Line-A", "Line-F","Debug","","FormErr","Uninit",
"","","","","","","","",
"Spurious","Level1","Level2","Level3","Level4","Level5","Level6","Level7",
"Trap0","Trap1","Trap2","Trap3","Trap4","Trap5","Trap6","Trap7",
"Trap8","Trap9","Trap10","Trap11","Trap12","Trap13","Trap14","Trap15",
"SWT","Timer0","Timer1","I2C","UART1","UART2","DMA0","DMA1",
"DMA2","DMA3","QSPI","","","","","",
"PDIR1FULL","PDIR2FULL","EBUTXEMPTY","IIS2TXEMPTY",
"IIS1TXEMPTY","PDIR3FULL","PDIR3RESYN","UQ2CHANERR",
"AUDIOTICK","PDIR2RESYN","PDIR2UNOV","PDIR1RESYN",
"PDIR1UNOV","UQ1CHANERR","IEC2BUFATTEN","IEC2PARERR",
"IEC2VALNOGOOD","IEC2CNEW","IEC1BUFATTEN","UCHANTXNF",
"UCHANTXUNDER","UCHANTXEMPTY","PDIR3UNOV","IEC1PARERR",
"IEC1VALNOGOOD","IEC1CNEW","EBUTXRESYN","EBUTXUNOV",
"IIS2TXRESYN","IIS2TXUNOV","IIS1TXRESYN","IIS1TXUNOV",
"GPIO0","GPI1","GPI2","GPI3","GPI4","GPI5","GPI6","GPI7",
"","","","","","","","SOFTINT0",
"SOFTINT1","SOFTINT2","SOFTINT3","",
"","CDROMCRCERR","CDROMNOSYNC","CDROMILSYNC",
"CDROMNEWBLK","","","","","","","",
"","","","","","","","",
"","","","","","","","",
"","","","","","","","",
"","","","","","","","",
"","","","","","","","",
"","","","","","","","",
"","","","","","","","",
"","","","","","","",""
};
default_interrupt (TRAP0); /* Trap #0 */
default_interrupt (TRAP1); /* Trap #1 */
default_interrupt (TRAP2); /* Trap #2 */
default_interrupt (TRAP3); /* Trap #3 */
default_interrupt (TRAP4); /* Trap #4 */
default_interrupt (TRAP5); /* Trap #5 */
default_interrupt (TRAP6); /* Trap #6 */
default_interrupt (TRAP7); /* Trap #7 */
default_interrupt (TRAP8); /* Trap #8 */
default_interrupt (TRAP9); /* Trap #9 */
default_interrupt (TRAP10); /* Trap #10 */
default_interrupt (TRAP11); /* Trap #11 */
default_interrupt (TRAP12); /* Trap #12 */
default_interrupt (TRAP13); /* Trap #13 */
default_interrupt (TRAP14); /* Trap #14 */
default_interrupt (TRAP15); /* Trap #15 */
default_interrupt (SWT); /* Software Watchdog Timer */
default_interrupt (TIMER0); /* Timer 0 */
default_interrupt (TIMER1); /* Timer 1 */
default_interrupt (I2C); /* I2C */
default_interrupt (UART1); /* UART 1 */
default_interrupt (UART2); /* UART 2 */
default_interrupt (DMA0); /* DMA 0 */
default_interrupt (DMA1); /* DMA 1 */
default_interrupt (DMA2); /* DMA 2 */
default_interrupt (DMA3); /* DMA 3 */
default_interrupt (QSPI); /* QSPI */
default_interrupt (PDIR1FULL); /* Processor data in 1 full */
default_interrupt (PDIR2FULL); /* Processor data in 2 full */
default_interrupt (EBUTXEMPTY); /* EBU transmit FIFO empty */
default_interrupt (IIS2TXEMPTY); /* IIS2 transmit FIFO empty */
default_interrupt (IIS1TXEMPTY); /* IIS1 transmit FIFO empty */
default_interrupt (PDIR3FULL); /* Processor data in 3 full */
default_interrupt (PDIR3RESYN); /* Processor data in 3 resync */
default_interrupt (UQ2CHANERR); /* IEC958-2 Rx U/Q channel error */
default_interrupt (AUDIOTICK); /* "tick" interrupt */
default_interrupt (PDIR2RESYN); /* Processor data in 2 resync */
default_interrupt (PDIR2UNOV); /* Processor data in 2 under/overrun */
default_interrupt (PDIR1RESYN); /* Processor data in 1 resync */
default_interrupt (PDIR1UNOV); /* Processor data in 1 under/overrun */
default_interrupt (UQ1CHANERR); /* IEC958-1 Rx U/Q channel error */
default_interrupt (IEC2BUFATTEN);/* IEC958-2 channel buffer full */
default_interrupt (IEC2PARERR); /* IEC958-2 Rx parity or symbol error */
default_interrupt (IEC2VALNOGOOD);/* IEC958-2 flag not good */
default_interrupt (IEC2CNEW); /* IEC958-2 New C-channel received */
default_interrupt (IEC1BUFATTEN);/* IEC958-1 channel buffer full */
default_interrupt (UCHANTXNF); /* U channel Tx reg next byte is first */
default_interrupt (UCHANTXUNDER);/* U channel Tx reg underrun */
default_interrupt (UCHANTXEMPTY);/* U channel Tx reg is empty */
default_interrupt (PDIR3UNOV); /* Processor data in 3 under/overrun */
default_interrupt (IEC1PARERR); /* IEC958-1 Rx parity or symbol error */
default_interrupt (IEC1VALNOGOOD);/* IEC958-1 flag not good */
default_interrupt (IEC1CNEW); /* IEC958-1 New C-channel received */
default_interrupt (EBUTXRESYN); /* EBU Tx FIFO resync */
default_interrupt (EBUTXUNOV); /* EBU Tx FIFO under/overrun */
default_interrupt (IIS2TXRESYN); /* IIS2 Tx FIFO resync */
default_interrupt (IIS2TXUNOV); /* IIS2 Tx FIFO under/overrun */
default_interrupt (IIS1TXRESYN); /* IIS1 Tx FIFO resync */
default_interrupt (IIS1TXUNOV); /* IIS1 Tx FIFO under/overrun */
default_interrupt (GPI0); /* GPIO interrupt 0 */
default_interrupt (GPI1); /* GPIO interrupt 1 */
default_interrupt (GPI2); /* GPIO interrupt 2 */
default_interrupt (GPI3); /* GPIO interrupt 3 */
default_interrupt (GPI4); /* GPIO interrupt 4 */
default_interrupt (GPI5); /* GPIO interrupt 5 */
default_interrupt (GPI6); /* GPIO interrupt 6 */
default_interrupt (GPI7); /* GPIO interrupt 7 */
default_interrupt (SOFTINT0); /* Software interrupt 0 */
default_interrupt (SOFTINT1); /* Software interrupt 1 */
default_interrupt (SOFTINT2); /* Software interrupt 2 */
default_interrupt (SOFTINT3); /* Software interrupt 3 */
default_interrupt (CDROMCRCERR); /* CD-ROM CRC error */
default_interrupt (CDROMNOSYNC); /* CD-ROM No sync */
default_interrupt (CDROMILSYNC); /* CD-ROM Illegal sync */
default_interrupt (CDROMNEWBLK); /* CD-ROM New block */
void UIE (void) /* Unexpected Interrupt or Exception */
{
unsigned int format_vector, pc;
int vector;
char str[32];
asm volatile ("move.l (52,%%sp),%0": "=r"(format_vector));
asm volatile ("move.l (56,%%sp),%0": "=r"(pc));
vector = (format_vector >> 18) & 0xff;
/* clear screen */
lcd_clear_display ();
#ifdef HAVE_LCD_BITMAP
lcd_setfont(FONT_SYSFIXED);
#endif
snprintf(str,sizeof(str),"I%02x:%s",vector,irqname[vector]);
lcd_puts(0,0,str);
snprintf(str,sizeof(str),"at %08x",pc);
lcd_puts(0,1,str);
lcd_update();
/* set cpu frequency to 11mhz (to prevent overheating) */
DCR = (DCR & ~0x01ff) | 1;
PLLCR = 0x10800000;
while (1)
{
/* check for the ON button (and !hold) */
if ((GPIO1_READ & 0x22) == 0)
SYPCR = 0xc0;
/* Start watchdog timer with 512 cycles timeout. Don't service it. */
/* We need a reset method that works in all cases. Calling system_reboot()
doesn't work when we're called from the debug interrupt, because then
the CPU is in emulator mode and the only ways leaving it are exexcuting
an rte instruction or performing a reset. Even disabling the breakpoint
logic and performing special rte magic doesn't make system_reboot()
reliable. The system restarts, but boot often fails with ata error -42. */
}
}
/* reset vectors are handled in crt0.S */
void (* const vbr[]) (void) __attribute__ ((section (".vectors"))) =
{
UIE,UIE,UIE,UIE,UIE,UIE,
UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,
UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,
UIE,UIE,UIE,TIMER0,TIMER1,UIE,UIE,UIE,
/* lvl 3 lvl 4 */
TRAP0,TRAP1,TRAP2,TRAP3,TRAP4,TRAP5,TRAP6,TRAP7,
TRAP8,TRAP9,TRAP10,TRAP11,TRAP12,TRAP13,TRAP14,TRAP15,
SWT,UIE,UIE,I2C,UART1,UART2,DMA0,DMA1,
DMA2,DMA3,QSPI,UIE,UIE,UIE,UIE,UIE,
PDIR1FULL,PDIR2FULL,EBUTXEMPTY,IIS2TXEMPTY,
IIS1TXEMPTY,PDIR3FULL,PDIR3RESYN,UQ2CHANERR,
AUDIOTICK,PDIR2RESYN,PDIR2UNOV,PDIR1RESYN,
PDIR1UNOV,UQ1CHANERR,IEC2BUFATTEN,IEC2PARERR,
IEC2VALNOGOOD,IEC2CNEW,IEC1BUFATTEN,UCHANTXNF,
UCHANTXUNDER,UCHANTXEMPTY,PDIR3UNOV,IEC1PARERR,
IEC1VALNOGOOD,IEC1CNEW,EBUTXRESYN,EBUTXUNOV,
IIS2TXRESYN,IIS2TXUNOV,IIS1TXRESYN,IIS1TXUNOV,
GPI0,GPI1,GPI2,GPI3,GPI4,GPI5,GPI6,GPI7,
UIE,UIE,UIE,UIE,UIE,UIE,UIE,SOFTINT0,
SOFTINT1,SOFTINT2,SOFTINT3,UIE,
UIE,CDROMCRCERR,CDROMNOSYNC,CDROMILSYNC,
CDROMNEWBLK,UIE,UIE,UIE,UIE,UIE,UIE,UIE,
UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,
UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,
UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,
UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,
UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,
UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,
UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,
UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE
};
void system_init(void)
{
/* Clear the accumulators. From here on it's the responsibility of
whoever uses them to clear them after use (use movclr instruction). */
asm volatile ("movclr.l %%acc0, %%d0\n\t"
"movclr.l %%acc1, %%d0\n\t"
"movclr.l %%acc2, %%d0\n\t"
"movclr.l %%acc3, %%d0\n\t"
: : : "d0");
}
void system_reboot (void)
{
set_cpu_frequency(0);
asm(" move.w #0x2700,%sr");
/* Reset the cookie for the crt0 crash check */
asm(" move.l #0,%d0");
asm(" move.l %d0,0x10017ffc");
asm(" movec.l %d0,%vbr");
asm(" move.l 0,%sp");
asm(" move.l 4,%a0");
asm(" jmp (%a0)");
}
/* Utilise the breakpoint hardware to catch invalid memory accesses. */
int system_memory_guard(int newmode)
{
static const unsigned long modes[MAXMEMGUARD][8] = {
{ /* catch nothing */
0x2C870000, 0x00000000, /* TDR = 0x00000000 */
0x2C8D0000, 0x00000000, /* ABLR = 0x00000000 */
0x2C8C0000, 0x00000000, /* ABHR = 0x00000000 */
0x2C860000, 0x00050000, /* AATR = 0x0005 */
},
{ /* catch flash ROM writes */
0x2C8D0000, 0x00000000, /* ABLR = 0x00000000 */
0x2C8C0FFF, 0xFFFF0000, /* ABHR = 0x0FFFFFFF */
0x2C860000, 0x6F050000, /* AATR = 0x6F05 */
0x2C878000, 0x20080000, /* TDR = 0x80002008 */
},
{ /* catch all accesses to zero area */
0x2C8D0000, 0x00000000, /* ABLR = 0x00000000 */
0x2C8C0FFF, 0xFFFF0000, /* ABHR = 0x0FFFFFFF */
0x2C860000, 0xEF050000, /* AATR = 0xEF05 */
0x2C878000, 0x20080000, /* TDR = 0x80002008 */
}
/* Note: CPU space accesses (movec instruction), interrupt acknowledges
and emulator mode accesses are never caught. */
};
static int cur_mode = MEMGUARD_NONE;
int oldmode = cur_mode;
const unsigned long *ptr;
int i;
if (newmode == MEMGUARD_KEEP)
newmode = oldmode;
/* Always set the new mode, we don't know the old settings
as we cannot read back */
ptr = modes[newmode];
for (i = 0; i < 4; i++)
{
asm ( "wdebug (%0) \n" : : "a"(ptr));
ptr += 2;
}
cur_mode = newmode;
return oldmode;
}
#ifndef TARGET_TREE
#ifdef IRIVER_H100
#define MAX_REFRESH_TIMER 59
#define NORMAL_REFRESH_TIMER 21
#define DEFAULT_REFRESH_TIMER 4
#else
#define MAX_REFRESH_TIMER 29
#define NORMAL_REFRESH_TIMER 10
#define DEFAULT_REFRESH_TIMER 1
#endif
void set_cpu_frequency (long) __attribute__ ((section (".icode")));
void set_cpu_frequency(long frequency)
{
switch(frequency)
{
case CPUFREQ_MAX:
DCR = (0x8200 | DEFAULT_REFRESH_TIMER);
/* Refresh timer for bypass frequency */
PLLCR &= ~1; /* Bypass mode */
timers_adjust_prescale(CPUFREQ_DEFAULT_MULT, false);
PLLCR = 0x11856005;
CSCR0 = 0x00001180; /* Flash: 4 wait states */
CSCR1 = 0x00000980; /* LCD: 2 wait states */
while(!(PLLCR & 0x80000000)) {}; /* Wait until the PLL has locked.
This may take up to 10ms! */
timers_adjust_prescale(CPUFREQ_MAX_MULT, true);
DCR = (0x8200 | MAX_REFRESH_TIMER); /* Refresh timer */
cpu_frequency = CPUFREQ_MAX;
IDECONFIG1 = 0x106000 | (5 << 10); /* BUFEN2 enable + CS2Pre/CS2Post */
IDECONFIG2 = 0x40000 | (1 << 8); /* TA enable + CS2wait */
break;
case CPUFREQ_NORMAL:
DCR = (DCR & ~0x01ff) | DEFAULT_REFRESH_TIMER;
/* Refresh timer for bypass frequency */
PLLCR &= ~1; /* Bypass mode */
timers_adjust_prescale(CPUFREQ_DEFAULT_MULT, false);
PLLCR = 0x1385e005;
CSCR0 = 0x00000580; /* Flash: 1 wait state */
CSCR1 = 0x00000180; /* LCD: 0 wait states */
while(!(PLLCR & 0x80000000)) {}; /* Wait until the PLL has locked.
This may take up to 10ms! */
timers_adjust_prescale(CPUFREQ_NORMAL_MULT, true);
DCR = (0x8000 | NORMAL_REFRESH_TIMER); /* Refresh timer */
cpu_frequency = CPUFREQ_NORMAL;
IDECONFIG1 = 0x106000 | (5 << 10); /* BUFEN2 enable + CS2Pre/CS2Post */
IDECONFIG2 = 0x40000 | (0 << 8); /* TA enable + CS2wait */
break;
default:
DCR = (DCR & ~0x01ff) | DEFAULT_REFRESH_TIMER;
/* Refresh timer for bypass frequency */
PLLCR &= ~1; /* Bypass mode */
timers_adjust_prescale(CPUFREQ_DEFAULT_MULT, true);
PLLCR = 0x10800200; /* Power down PLL, but keep CLSEL and CRSEL */
CSCR0 = 0x00000180; /* Flash: 0 wait states */
CSCR1 = 0x00000180; /* LCD: 0 wait states */
DCR = (0x8000 | DEFAULT_REFRESH_TIMER); /* Refresh timer */
cpu_frequency = CPUFREQ_DEFAULT;
IDECONFIG1 = 0x106000 | (1 << 10); /* BUFEN2 enable + CS2Pre/CS2Post */
IDECONFIG2 = 0x40000 | (0 << 8); /* TA enable + CS2wait */
break;
}
}
#endif
#elif CONFIG_CPU == SH7034
#include "led.h"
#include "system.h"
#include "rolo.h"
#define default_interrupt(name,number) \
extern __attribute__((weak,alias("UIE" #number))) void name (void); void UIE##number (void)
#define reserve_interrupt(number) \
void UIE##number (void)
static const char* const irqname[] = {
"", "", "", "", "IllInstr", "", "IllSltIn","","",
"CPUAdrEr", "DMAAdrEr", "NMI", "UserBrk",
"","","","","","","","","","","","","","","","","","","",
"Trap32","Trap33","Trap34","Trap35","Trap36","Trap37","Trap38","Trap39",
"Trap40","Trap41","Trap42","Trap43","Trap44","Trap45","Trap46","Trap47",
"Trap48","Trap49","Trap50","Trap51","Trap52","Trap53","Trap54","Trap55",
"Trap56","Trap57","Trap58","Trap59","Trap60","Trap61","Trap62","Trap63",
"Irq0","Irq1","Irq2","Irq3","Irq4","Irq5","Irq6","Irq7",
"Dma0","","Dma1","","Dma2","","Dma3","",
"IMIA0","IMIB0","OVI0","", "IMIA1","IMIB1","OVI1","",
"IMIA2","IMIB2","OVI2","", "IMIA3","IMIB3","OVI3","",
"IMIA4","IMIB4","OVI4","",
"Ser0Err","Ser0Rx","Ser0Tx","Ser0TE",
"Ser1Err","Ser1Rx","Ser1Tx","Ser1TE",
"ParityEr","A/D conv","","","Watchdog","DRAMRefr"
};
reserve_interrupt ( 0);
reserve_interrupt ( 1);
reserve_interrupt ( 2);
reserve_interrupt ( 3);
default_interrupt (GII, 4);
reserve_interrupt ( 5);
default_interrupt (ISI, 6);
reserve_interrupt ( 7);
reserve_interrupt ( 8);
default_interrupt (CPUAE, 9);
default_interrupt (DMAAE, 10);
default_interrupt (NMI, 11);
default_interrupt (UB, 12);
reserve_interrupt ( 13);
reserve_interrupt ( 14);
reserve_interrupt ( 15);
reserve_interrupt ( 16); /* TCB #0 */
reserve_interrupt ( 17); /* TCB #1 */
reserve_interrupt ( 18); /* TCB #2 */
reserve_interrupt ( 19); /* TCB #3 */
reserve_interrupt ( 20); /* TCB #4 */
reserve_interrupt ( 21); /* TCB #5 */
reserve_interrupt ( 22); /* TCB #6 */
reserve_interrupt ( 23); /* TCB #7 */
reserve_interrupt ( 24); /* TCB #8 */
reserve_interrupt ( 25); /* TCB #9 */
reserve_interrupt ( 26); /* TCB #10 */
reserve_interrupt ( 27); /* TCB #11 */
reserve_interrupt ( 28); /* TCB #12 */
reserve_interrupt ( 29); /* TCB #13 */
reserve_interrupt ( 30); /* TCB #14 */
reserve_interrupt ( 31); /* TCB #15 */
default_interrupt (TRAPA32, 32);
default_interrupt (TRAPA33, 33);
default_interrupt (TRAPA34, 34);
default_interrupt (TRAPA35, 35);
default_interrupt (TRAPA36, 36);
default_interrupt (TRAPA37, 37);
default_interrupt (TRAPA38, 38);
default_interrupt (TRAPA39, 39);
default_interrupt (TRAPA40, 40);
default_interrupt (TRAPA41, 41);
default_interrupt (TRAPA42, 42);
default_interrupt (TRAPA43, 43);
default_interrupt (TRAPA44, 44);
default_interrupt (TRAPA45, 45);
default_interrupt (TRAPA46, 46);
default_interrupt (TRAPA47, 47);
default_interrupt (TRAPA48, 48);
default_interrupt (TRAPA49, 49);
default_interrupt (TRAPA50, 50);
default_interrupt (TRAPA51, 51);
default_interrupt (TRAPA52, 52);
default_interrupt (TRAPA53, 53);
default_interrupt (TRAPA54, 54);
default_interrupt (TRAPA55, 55);
default_interrupt (TRAPA56, 56);
default_interrupt (TRAPA57, 57);
default_interrupt (TRAPA58, 58);
default_interrupt (TRAPA59, 59);
default_interrupt (TRAPA60, 60);
default_interrupt (TRAPA61, 61);
default_interrupt (TRAPA62, 62);
default_interrupt (TRAPA63, 63);
default_interrupt (IRQ0, 64);
default_interrupt (IRQ1, 65);
default_interrupt (IRQ2, 66);
default_interrupt (IRQ3, 67);
default_interrupt (IRQ4, 68);
default_interrupt (IRQ5, 69);
default_interrupt (IRQ6, 70);
default_interrupt (IRQ7, 71);
default_interrupt (DEI0, 72);
reserve_interrupt ( 73);
default_interrupt (DEI1, 74);
reserve_interrupt ( 75);
default_interrupt (DEI2, 76);
reserve_interrupt ( 77);
default_interrupt (DEI3, 78);
reserve_interrupt ( 79);
default_interrupt (IMIA0, 80);
default_interrupt (IMIB0, 81);
default_interrupt (OVI0, 82);
reserve_interrupt ( 83);
default_interrupt (IMIA1, 84);
default_interrupt (IMIB1, 85);
default_interrupt (OVI1, 86);
reserve_interrupt ( 87);
default_interrupt (IMIA2, 88);
default_interrupt (IMIB2, 89);
default_interrupt (OVI2, 90);
reserve_interrupt ( 91);
default_interrupt (IMIA3, 92);
default_interrupt (IMIB3, 93);
default_interrupt (OVI3, 94);
reserve_interrupt ( 95);
default_interrupt (IMIA4, 96);
default_interrupt (IMIB4, 97);
default_interrupt (OVI4, 98);
reserve_interrupt ( 99);
default_interrupt (REI0, 100);
default_interrupt (RXI0, 101);
default_interrupt (TXI0, 102);
default_interrupt (TEI0, 103);
default_interrupt (REI1, 104);
default_interrupt (RXI1, 105);
default_interrupt (TXI1, 106);
default_interrupt (TEI1, 107);
reserve_interrupt ( 108);
default_interrupt (ADITI, 109);
/* reset vectors are handled in crt0.S */
void (*vbr[]) (void) __attribute__ ((section (".vectors"))) =
{
GII, /*** 4 General Illegal Instruction ***/
UIE5, /*** 5 Reserved ***/
ISI, /*** 6 Illegal Slot Instruction ***/
UIE7, /*** 7-8 Reserved ***/
UIE8,
CPUAE, /*** 9 CPU Address Error ***/
DMAAE, /*** 10 DMA Address Error ***/
NMI, /*** 11 NMI ***/
UB, /*** 12 User Break ***/
/*** 13-31 Reserved ***/
UIE13,UIE14,UIE15,UIE16,UIE17,UIE18,UIE19,UIE20,
UIE21,UIE22,UIE23,UIE24,UIE25,UIE26,UIE27,UIE28,
UIE29,UIE30,UIE31,
/*** 32-63 TRAPA #20...#3F ***/
TRAPA32,TRAPA33,TRAPA34,TRAPA35,TRAPA36,TRAPA37,TRAPA38,TRAPA39,
TRAPA40,TRAPA41,TRAPA42,TRAPA43,TRAPA44,TRAPA45,TRAPA46,TRAPA47,
TRAPA48,TRAPA49,TRAPA50,TRAPA51,TRAPA52,TRAPA53,TRAPA54,TRAPA55,
TRAPA56,TRAPA57,TRAPA58,TRAPA59,TRAPA60,TRAPA61,TRAPA62,TRAPA63,
/*** 64-71 IRQ0-7 ***/
IRQ0,IRQ1,IRQ2,IRQ3,IRQ4,IRQ5,IRQ6,IRQ7,
DEI0, /*** 72 DMAC0 ***/
UIE73, /*** 73 Reserved ***/
DEI1, /*** 74 DMAC1 ***/
UIE75, /*** 75 Reserved ***/
DEI2, /*** 76 DMAC2 ***/
UIE77, /*** 77 Reserved ***/
DEI3, /*** 78 DMAC3 ***/
UIE79, /*** 79 Reserved ***/
IMIA0, /*** 80-82 ITU0 ***/
IMIB0,
OVI0,
UIE83, /*** 83 Reserved ***/
IMIA1, /*** 84-86 ITU1 ***/
IMIB1,
OVI1,
UIE87, /*** 87 Reserved ***/
IMIA2, /*** 88-90 ITU2 ***/
IMIB2,
OVI2,
UIE91, /*** 91 Reserved ***/
IMIA3, /*** 92-94 ITU3 ***/
IMIB3,
OVI3,
UIE95, /*** 95 Reserved ***/
IMIA4, /*** 96-98 ITU4 ***/
IMIB4,
OVI4,
UIE99, /*** 99 Reserved ***/
/*** 100-103 SCI0 ***/
REI0,RXI0,TXI0,TEI0,
/*** 104-107 SCI1 ***/
REI1,RXI1,TXI1,TEI1,
UIE108, /*** 108 Parity Control Unit ***/
ADITI /*** 109 AD Converter ***/
};
void UIE (unsigned int pc) /* Unexpected Interrupt or Exception */
{
#if CONFIG_LED == LED_REAL
bool state = true;
#endif
unsigned int n;
char str[32];
asm volatile ("sts\tpr,%0" : "=r"(n));
/* clear screen */
lcd_clear_display ();
#ifdef HAVE_LCD_BITMAP
lcd_setfont(FONT_SYSFIXED);
#endif
/* output exception */
n = (n - (unsigned)UIE0 - 4)>>2; /* get exception or interrupt number */
snprintf(str,sizeof(str),"I%02x:%s",n,irqname[n]);
lcd_puts(0,0,str);
snprintf(str,sizeof(str),"at %08x",pc);
lcd_puts(0,1,str);
#ifdef HAVE_LCD_BITMAP
lcd_update ();
#endif
while (1)
{
#if CONFIG_LED == LED_REAL
volatile int i;
led (state);
state = !state;
for (i = 0; i < 240000; ++i);
#endif
/* try to restart firmware if ON is pressed */
#if CONFIG_KEYPAD == PLAYER_PAD
if (!(PADRL & 0x20))
#elif CONFIG_KEYPAD == RECORDER_PAD
#ifdef HAVE_FMADC
if (!(PCDR & 0x0008))
#else
if (!(PBDRH & 0x01))
#endif
#elif CONFIG_KEYPAD == ONDIO_PAD
if (!(PCDR & 0x0008))
#endif
{
/* enable the watchguard timer, but don't service it */
RSTCSR_W = 0x5a40; /* Reset enabled, power-on reset */
TCSR_W = 0xa560; /* Watchdog timer mode, timer enabled, sysclk/2 */
}
}
}
asm (
"_UIE0:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE1:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE2:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE3:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE4:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE5:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE6:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE7:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE8:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE9:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE10:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE11:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE12:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE13:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE14:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE15:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE16:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE17:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE18:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE19:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE20:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE21:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE22:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE23:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE24:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE25:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE26:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE27:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE28:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE29:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE30:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE31:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE32:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE33:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE34:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE35:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE36:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE37:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE38:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE39:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE40:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE41:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE42:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE43:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE44:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE45:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE46:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE47:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE48:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE49:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE50:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE51:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE52:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE53:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE54:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE55:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE56:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE57:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE58:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE59:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE60:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE61:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE62:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE63:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE64:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE65:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE66:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE67:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE68:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE69:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE70:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE71:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE72:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE73:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE74:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE75:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE76:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE77:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE78:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE79:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE80:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE81:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE82:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE83:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE84:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE85:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE86:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE87:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE88:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE89:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE90:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE91:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE92:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE93:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE94:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE95:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE96:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE97:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE98:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE99:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE100:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE101:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE102:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE103:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE104:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE105:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE106:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE107:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE108:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\t\n"
"_UIE109:\tbsr\t_UIE\n\tmov.l\t@r15+,r4");
void system_init(void)
{
/* Disable all interrupts */
IPRA = 0;
IPRB = 0;
IPRC = 0;
IPRD = 0;
IPRE = 0;
/* NMI level low, falling edge on all interrupts */
ICR = 0;
/* Enable burst and RAS down mode on DRAM */
DCR |= 0x5000;
/* Activate Warp mode (simultaneous internal and external mem access) */
BCR |= 0x2000;
/* Bus state controller initializations. These are only necessary when
running from flash. */
WCR1 = 0x40FD; /* Long wait states for CS6 (ATA), short for the rest. */
WCR3 = 0x8000; /* WAIT is pulled up, 1 state inserted for CS6 */
}
void system_reboot (void)
{
set_irq_level(HIGHEST_IRQ_LEVEL);
asm volatile ("ldc\t%0,vbr" : : "r"(0));
PACR2 |= 0x4000; /* for coldstart detection */
IPRA = 0;
IPRB = 0;
IPRC = 0;
IPRD = 0;
IPRE = 0;
ICR = 0;
asm volatile ("jmp @%0; mov.l @%1,r15" : :
"r"(*(int*)0),"r"(4));
}
/* Utilise the user break controller to catch invalid memory accesses. */
int system_memory_guard(int newmode)
{
static const struct {
unsigned long addr;
unsigned long mask;
unsigned short bbr;
} modes[MAXMEMGUARD] = {
/* catch nothing */
{ 0x00000000, 0x00000000, 0x0000 },
/* catch writes to area 02 (flash ROM) */
{ 0x02000000, 0x00FFFFFF, 0x00F8 },
/* catch all accesses to areas 00 (internal ROM) and 01 (free) */
{ 0x00000000, 0x01FFFFFF, 0x00FC }
};
int oldmode = MEMGUARD_NONE;
int i;
/* figure out the old mode from what is in the UBC regs. If the register
values don't match any mode, assume MEMGUARD_NONE */
for (i = MEMGUARD_NONE; i < MAXMEMGUARD; i++)
{
if (BAR == modes[i].addr && BAMR == modes[i].mask &&
BBR == modes[i].bbr)
{
oldmode = i;
break;
}
}
if (newmode == MEMGUARD_KEEP)
newmode = oldmode;
BBR = 0; /* switch off everything first */
/* always set the UBC according to the mode, in case the old settings
didn't match any valid mode */
BAR = modes[newmode].addr;
BAMR = modes[newmode].mask;
BBR = modes[newmode].bbr;
return oldmode;
}
#elif defined(CPU_ARM)
static const char* const uiename[] = {
"Undefined instruction", "Prefetch abort", "Data abort"
};
/* Unexpected Interrupt or Exception handler. Currently only deals with
exceptions, but will deal with interrupts later.
*/
void UIE(unsigned int pc, unsigned int num)
{
char str[32];
lcd_clear_display();
#ifdef HAVE_LCD_BITMAP
lcd_setfont(FONT_SYSFIXED);
#endif
lcd_puts(0, 0, uiename[num]);
snprintf(str, sizeof(str), "at %08x", pc);
lcd_puts(0, 1, str);
lcd_update();
while (1)
{
/* TODO: perhaps add button handling in here when we get a polling
driver some day.
*/
}
}
#if CONFIG_CPU==PP5020
unsigned int ipod_hw_rev;
#ifndef BOOTLOADER
extern void TIMER1(void);
extern void TIMER2(void);
#if defined(APPLE_IPODMINI)
extern void ipod_mini_button_int(void);
void irq(void)
{
if (CPU_INT_STAT & TIMER1_MASK)
TIMER1();
else if (CPU_INT_STAT & TIMER2_MASK)
TIMER2();
else if (CPU_HI_INT_STAT & GPIO_MASK)
ipod_mini_button_int();
}
#else
extern void ipod_4g_button_int(void);
void irq(void)
{
if (CPU_INT_STAT & TIMER1_MASK)
TIMER1();
else if (CPU_INT_STAT & TIMER2_MASK)
TIMER2();
else if (CPU_HI_INT_STAT & I2C_MASK)
ipod_4g_button_int();
}
#endif
#endif /* BOOTLOADER */
/* TODO: The following two function have been lifted straight from IPL, and
hence have a lot of numeric addresses used straight. I'd like to use
#defines for these, but don't know what most of them are for or even what
they should be named. Because of this I also have no way of knowing how
to extend the funtions to do alternate cache configurations and/or
some other CPU frequency scaling. */
#ifndef BOOTLOADER
static void ipod_init_cache(void)
{
/* Initialising the cache in the iPod bootloader prevents Rockbox from starting */
unsigned i;
/* cache init mode? */
outl(0x4, 0x6000C000);
/* PP5002 has 8KB cache */
for (i = 0xf0004000; i < 0xf0006000; i += 16) {
outl(0x0, i);
}
outl(0x0, 0xf000f040);
outl(0x3fc0, 0xf000f044);
/* enable cache */
outl(0x1, 0x6000C000);
for (i = 0x10000000; i < 0x10002000; i += 16)
inb(i);
}
#endif
/* Not all iPod targets support CPU freq. boosting yet */
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
void set_cpu_frequency(long frequency)
{
unsigned long postmult;
if (frequency == CPUFREQ_NORMAL)
postmult = CPUFREQ_NORMAL_MULT;
else if (frequency == CPUFREQ_MAX)
postmult = CPUFREQ_MAX_MULT;
else
postmult = CPUFREQ_DEFAULT_MULT;
cpu_frequency = frequency;
/* Enable PLL? */
outl(inl(0x70000020) | (1<<30), 0x70000020);
/* Select 24MHz crystal as clock source? */
outl((inl(0x60006020) & 0x0fffff0f) | 0x20000020, 0x60006020);
/* Clock frequency = (24/8)*postmult */
outl(0xaa020000 | 8 | (postmult << 8), 0x60006034);
/* Wait for PLL relock? */
udelay(2000);
/* Select PLL as clock source? */
outl((inl(0x60006020) & 0x0fffff0f) | 0x20000070, 0x60006020);
}
#elif !defined(BOOTLOADER)
void ipod_set_cpu_frequency(void)
{
/* Enable PLL? */
outl(inl(0x70000020) | (1<<30), 0x70000020);
/* Select 24MHz crystal as clock source? */
outl((inl(0x60006020) & 0x0fffff0f) | 0x20000020, 0x60006020);
/* Clock frequency = (24/8)*25 = 75MHz */
outl(0xaa020000 | 8 | (25 << 8), 0x60006034);
/* Wait for PLL relock? */
udelay(2000);
/* Select PLL as clock source? */
outl((inl(0x60006020) & 0x0fffff0f) | 0x20000070, 0x60006020);
}
#endif
void system_init(void)
{
#ifndef BOOTLOADER
/* The hw revision is written to the last 4 bytes of SDRAM by the
bootloader - we save it before Rockbox overwrites it. */
ipod_hw_rev = (*((volatile unsigned long*)(0x01fffffc)));
/* disable all irqs */
outl(-1, 0x60001138);
outl(-1, 0x60001128);
outl(-1, 0x6000111c);
outl(-1, 0x60001038);
outl(-1, 0x60001028);
outl(-1, 0x6000101c);
#ifndef HAVE_ADJUSTABLE_CPU_FREQ
ipod_set_cpu_frequency();
#endif
ipod_init_cache();
#endif
}
void system_reboot(void)
{
}
int system_memory_guard(int newmode)
{
(void)newmode;
return 0;
}
#elif CONFIG_CPU==PP5002
unsigned int ipod_hw_rev;
#ifndef BOOTLOADER
extern void TIMER1(void);
extern void TIMER2(void);
void irq(void)
{
if (CPU_INT_STAT & TIMER1_MASK)
TIMER1();
else if (CPU_INT_STAT & TIMER2_MASK)
TIMER2();
}
#endif
/* TODO: The following two function have been lifted straight from IPL, and
hence have a lot of numeric addresses used straight. I'd like to use
#defines for these, but don't know what most of them are for or even what
they should be named. Because of this I also have no way of knowing how
to extend the funtions to do alternate cache configurations and/or
some other CPU frequency scaling. */
#ifndef BOOTLOADER
static void ipod_init_cache(void)
{
int i =0;
/* Initialising the cache in the iPod bootloader prevents Rockbox from starting */
outl(inl(0xcf004050) & ~0x700, 0xcf004050);
outl(0x4000, 0xcf004020);
outl(0x2, 0xcf004024);
/* PP5002 has 8KB cache */
for (i = 0xf0004000; i < (int)(0xf0006000); i += 16) {
outl(0x0, i);
}
outl(0x0, 0xf000f020);
outl(0x3fc0, 0xf000f024);
outl(0x3, 0xcf004024);
}
static void ipod_set_cpu_speed(void)
{
outl(0x02, 0xcf005008);
outl(0x55, 0xcf00500c);
outl(0x6000, 0xcf005010);
#if 1
// 75 MHz (24/24 * 75) (default)
outl(24, 0xcf005018);
outl(75, 0xcf00501c);
#endif
#if 0
// 66 MHz (24/3 * 8)
outl(3, 0xcf005018);
outl(8, 0xcf00501c);
#endif
outl(0xe000, 0xcf005010);
udelay(2000);
outl(0xa8, 0xcf00500c);
}
#endif
void system_init(void)
{
#ifndef BOOTLOADER
ipod_hw_rev = (*((volatile unsigned long*)(0x01fffffc)));
outl(-1, 0xcf00101c);
outl(-1, 0xcf001028);
outl(-1, 0xcf001038);
ipod_set_cpu_speed();
ipod_init_cache();
#endif
}
void system_reboot(void)
{
outl(inl(0xcf005030) | 0x4, 0xcf005030);
}
int system_memory_guard(int newmode)
{
(void)newmode;
return 0;
}
#elif CONFIG_CPU==PNX0101
interrupt_handler_t interrupt_vector[0x1d] __attribute__ ((section(".idata")));
#define IRQ_REG(reg) (*(volatile unsigned long *)(0x80300000 + (reg)))
static inline unsigned long irq_read(int reg)
{
unsigned long v, v2;
do
{
v = IRQ_REG(reg);
v2 = IRQ_REG(reg);
} while (v != v2);
return v;
}
#define IRQ_WRITE_WAIT(reg, val, cond) \
do { unsigned long v, v2; \
do { \
IRQ_REG(reg) = (val); \
v = IRQ_REG(reg); \
v2 = IRQ_REG(reg); \
} while ((v != v2) || !(cond)); \
} while (0);
static void undefined_int(void)
{
}
void irq(void)
{
int n = irq_read(0x100) >> 3;
(*(interrupt_vector[n]))();
}
void fiq(void)
{
}
void irq_enable_int(int n)
{
IRQ_WRITE_WAIT(0x404 + n * 4, 0x4010000, v & 0x10000);
}
void irq_set_int_handler(int n, interrupt_handler_t handler)
{
interrupt_vector[n + 1] = handler;
}
void system_init(void)
{
int i;
/* turn off watchdog */
(*(volatile unsigned long *)0x80002804) = 0;
/*
IRQ_WRITE_WAIT(0x100, 0, v == 0);
IRQ_WRITE_WAIT(0x104, 0, v == 0);
IRQ_WRITE_WAIT(0, 0, v == 0);
IRQ_WRITE_WAIT(4, 0, v == 0);
*/
for (i = 0; i < 0x1c; i++)
{
IRQ_WRITE_WAIT(0x404 + i * 4, 0x1e000001, (v & 0x3010f) == 1);
IRQ_WRITE_WAIT(0x404 + i * 4, 0x4000000, (v & 0x10000) == 0);
IRQ_WRITE_WAIT(0x404 + i * 4, 0x10000001, (v & 0xf) == 1);
interrupt_vector[i + 1] = undefined_int;
}
interrupt_vector[0] = undefined_int;
}
void system_reboot(void)
{
(*(volatile unsigned long *)0x80002804) = 1;
while (1);
}
int system_memory_guard(int newmode)
{
(void)newmode;
return 0;
}
#endif /* CPU_ARM */
#endif /* CONFIG_CPU */
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