phys_size_t initdram(int board_type)
{
u32 dramsize = 0;
/*
* Check to see if the SDRAM has already been initialized
* by a run control tool
*/
if (!(mbar_readLong(MCFSIM_DCR) & 0x8000)) {
u32 RC, temp;
RC = (CONFIG_SYS_CLK / 1000000) >> 1;
RC = (RC * 15) >> 4;
/* Initialize DRAM Control Register: DCR */
mbar_writeShort(MCFSIM_DCR, (0x8400 | RC));
__asm__("nop");
mbar_writeLong(MCFSIM_DACR0, 0x00003224);
__asm__("nop");
/* Initialize DMR0 */
dramsize = (CONFIG_SYS_SDRAM_SIZE << 20);
temp = (dramsize - 1) & 0xFFFC0000;
mbar_writeLong(MCFSIM_DMR0, temp | 1);
__asm__("nop");
mbar_writeLong(MCFSIM_DACR0, 0x0000322c);
mb();
__asm__("nop");
/* Write to this block to initiate precharge */
*(u32 *) (CONFIG_SYS_SDRAM_BASE) = 0xa5a5a5a5;
mb();
__asm__("nop");
/* Set RE bit in DACR */
mbar_writeLong(MCFSIM_DACR0,
mbar_readLong(MCFSIM_DACR0) | 0x8000);
__asm__("nop");
/* Wait for at least 8 auto refresh cycles to occur */
udelay(500);
/* Finish the configuration by issuing the MRS */
mbar_writeLong(MCFSIM_DACR0,
mbar_readLong(MCFSIM_DACR0) | 0x0040);
__asm__("nop");
*(u32 *) (CONFIG_SYS_SDRAM_BASE + 0x800) = 0xa5a5a5a5;
mb();
}
/*
* Breath some life into the CPU...
*
* Set up the memory map,
* initialize a bunch of registers,
* initialize the UPM's
*/
void cpu_init_f(void)
{
/*
* NOTE: by setting the GPIO_FUNCTION registers, we ensure that the UART pins
* (UART0: gpio 30,27, UART1: gpio 31, 28) will be used as UART pins
* which is their primary function.
* ~Jeremy
*/
mbar2_writeLong(MCFSIM_GPIO_FUNC, CONFIG_SYS_GPIO_FUNC);
mbar2_writeLong(MCFSIM_GPIO1_FUNC, CONFIG_SYS_GPIO1_FUNC);
mbar2_writeLong(MCFSIM_GPIO_EN, CONFIG_SYS_GPIO_EN);
mbar2_writeLong(MCFSIM_GPIO1_EN, CONFIG_SYS_GPIO1_EN);
mbar2_writeLong(MCFSIM_GPIO_OUT, CONFIG_SYS_GPIO_OUT);
mbar2_writeLong(MCFSIM_GPIO1_OUT, CONFIG_SYS_GPIO1_OUT);
/*
* dBug Compliance:
* You can verify these values by using dBug's 'ird'
* (Internal Register Display) command
* ~Jeremy
*
*/
mbar_writeByte(MCFSIM_MPARK, 0x30); /* 5249 Internal Core takes priority over DMA */
mbar_writeByte(MCFSIM_SYPCR, 0x00);
mbar_writeByte(MCFSIM_SWIVR, 0x0f);
mbar_writeByte(MCFSIM_SWSR, 0x00);
mbar_writeLong(MCFSIM_IMR, 0xfffffbff);
mbar_writeByte(MCFSIM_SWDICR, 0x00);
mbar_writeByte(MCFSIM_TIMER1ICR, 0x00);
mbar_writeByte(MCFSIM_TIMER2ICR, 0x88);
mbar_writeByte(MCFSIM_I2CICR, 0x00);
mbar_writeByte(MCFSIM_UART1ICR, 0x00);
mbar_writeByte(MCFSIM_UART2ICR, 0x00);
mbar_writeByte(MCFSIM_ICR6, 0x00);
mbar_writeByte(MCFSIM_ICR7, 0x00);
mbar_writeByte(MCFSIM_ICR8, 0x00);
mbar_writeByte(MCFSIM_ICR9, 0x00);
mbar_writeByte(MCFSIM_QSPIICR, 0x00);
mbar2_writeLong(MCFSIM_GPIO_INT_EN, 0x00000080);
mbar2_writeByte(MCFSIM_INTBASE, 0x40); /* Base interrupts at 64 */
mbar2_writeByte(MCFSIM_SPURVEC, 0x00);
mbar2_writeLong(MCFSIM_IDECONFIG1, 0x00000020); /* Enable a 1 cycle pre-drive cycle on CS1 */
/* Setup interrupt priorities for gpio7 */
/* mbar2_writeLong(MCFSIM_INTLEV5, 0x70000000); */
/* IDE Config registers */
mbar2_writeLong(MCFSIM_IDECONFIG1, 0x00000020);
mbar2_writeLong(MCFSIM_IDECONFIG2, 0x00000000);
/* FlexBus Chipselect */
init_fbcs();
/* enable instruction cache now */
icache_enable();
}
void cpu_init_f(void)
{
#ifndef CONFIG_WATCHDOG
/* Disable the watchdog if we aren't using it */
mbar_writeShort(MCF_WTM_WCR, 0);
#endif
/* FlexBus Chipselect */
init_fbcs();
#ifdef CONFIG_SYS_MCF_SYNCR
/* Set clockspeed according to board header file */
mbar_writeLong(MCF_FMPLL_SYNCR, CONFIG_SYS_MCF_SYNCR);
#else
/* Set clockspeed to 100MHz */
mbar_writeLong(MCF_FMPLL_SYNCR,
MCF_FMPLL_SYNCR_MFD(0) | MCF_FMPLL_SYNCR_RFD(0));
#endif
while (!mbar_readByte(MCF_FMPLL_SYNSR) & MCF_FMPLL_SYNSR_LOCK) ;
}
void timer_init (void) {
volatile timer_t *timerp = (timer_t *) (CFG_MBAR + MCFTIMER_BASE2);
timestamp = 0;
/* Set up TIMER 2 as clock */
timerp->timer_tmr = MCFTIMER_TMR_DISABLE;
/* initialize and enable timer 2 interrupt */
irq_install_handler (31, mcf_timer_interrupt, 0);
mbar_writeLong(MCFSIM_IMR, mbar_readLong(MCFSIM_IMR) & ~0x00000400);
mbar_writeByte(MCFSIM_TIMER2ICR, MCFSIM_ICR_AUTOVEC | MCFSIM_ICR_LEVEL7 | MCFSIM_ICR_PRI3);
timerp->timer_tcn = 0;
timerp->timer_trr = 1000; /* Interrupt every ms */
/* set a period of 1us, set timer mode to restart and enable timer and interrupt */
/* on m5249 the system clock is (cpu_clk / 2) -> divide by 2000000 */
timerp->timer_tmr = (((CFG_CLK / 2000000) - 1) << 8) | MCFTIMER_TMR_CLK1 |
MCFTIMER_TMR_RESTART | MCFTIMER_TMR_ENORI | MCFTIMER_TMR_ENABLE;
}
void dtimer_intr_setup(void)
{
mbar_writeLong(MCFSIM_IMR, mbar_readLong(MCFSIM_IMR) & ~0x00000400);
mbar_writeByte(MCFSIM_TIMER2ICR, CONFIG_SYS_TMRINTR_PRI);
}
/*
* Breath some life into the CPU...
*
* Set up the memory map,
* initialize a bunch of registers,
* initialize the UPM's
*/
void cpu_init_f (void)
{
#ifndef CFG_PLL_BYPASS
/*
* Setup the PLL to run at the specified speed
*
*/
volatile unsigned long cpll = mbar2_readLong(MCFSIM_PLLCR);
unsigned long pllcr;
#ifdef CFG_FAST_CLK
pllcr = 0x925a3100; /* ~140MHz clock (PLL bypass = 0) */
#else
pllcr = 0x135a4140; /* ~72MHz clock (PLL bypass = 0) */
#endif
cpll = cpll & 0xfffffffe; /* Set PLL bypass mode = 0 (PSTCLK = crystal) */
mbar2_writeLong(MCFSIM_PLLCR, cpll); /* Set the PLL to bypass mode (PSTCLK = crystal) */
mbar2_writeLong(MCFSIM_PLLCR, pllcr); /* set the clock speed */
pllcr ^= 0x00000001; /* Set pll bypass to 1 */
mbar2_writeLong(MCFSIM_PLLCR, pllcr); /* Start locking (pll bypass = 1) */
udelay(0x20); /* Wait for a lock ... */
#endif /* #ifndef CFG_PLL_BYPASS */
/*
* NOTE: by setting the GPIO_FUNCTION registers, we ensure that the UART pins
* (UART0: gpio 30,27, UART1: gpio 31, 28) will be used as UART pins
* which is their primary function.
* ~Jeremy
*/
mbar2_writeLong(MCFSIM_GPIO_FUNC, CFG_GPIO_FUNC);
mbar2_writeLong(MCFSIM_GPIO1_FUNC, CFG_GPIO1_FUNC);
mbar2_writeLong(MCFSIM_GPIO_EN, CFG_GPIO_EN);
mbar2_writeLong(MCFSIM_GPIO1_EN, CFG_GPIO1_EN);
mbar2_writeLong(MCFSIM_GPIO_OUT, CFG_GPIO_OUT);
mbar2_writeLong(MCFSIM_GPIO1_OUT, CFG_GPIO1_OUT);
/*
* dBug Compliance:
* You can verify these values by using dBug's 'ird'
* (Internal Register Display) command
* ~Jeremy
*
*/
mbar_writeByte(MCFSIM_MPARK, 0x30); /* 5249 Internal Core takes priority over DMA */
mbar_writeByte(MCFSIM_SYPCR, 0x00);
mbar_writeByte(MCFSIM_SWIVR, 0x0f);
mbar_writeByte(MCFSIM_SWSR, 0x00);
mbar_writeLong(MCFSIM_IMR, 0xfffffbff);
mbar_writeByte(MCFSIM_SWDICR, 0x00);
mbar_writeByte(MCFSIM_TIMER1ICR, 0x00);
mbar_writeByte(MCFSIM_TIMER2ICR, 0x88);
mbar_writeByte(MCFSIM_I2CICR, 0x00);
mbar_writeByte(MCFSIM_UART1ICR, 0x00);
mbar_writeByte(MCFSIM_UART2ICR, 0x00);
mbar_writeByte(MCFSIM_ICR6, 0x00);
mbar_writeByte(MCFSIM_ICR7, 0x00);
mbar_writeByte(MCFSIM_ICR8, 0x00);
mbar_writeByte(MCFSIM_ICR9, 0x00);
mbar_writeByte(MCFSIM_QSPIICR, 0x00);
mbar2_writeLong(MCFSIM_GPIO_INT_EN, 0x00000080);
mbar2_writeByte(MCFSIM_INTBASE, 0x40); /* Base interrupts at 64 */
mbar2_writeByte(MCFSIM_SPURVEC, 0x00);
mbar2_writeLong(MCFSIM_IDECONFIG1, 0x00000020); /* Enable a 1 cycle pre-drive cycle on CS1 */
/* Setup interrupt priorities for gpio7 */
/* mbar2_writeLong(MCFSIM_INTLEV5, 0x70000000); */
/* IDE Config registers */
mbar2_writeLong(MCFSIM_IDECONFIG1, 0x00000020);
mbar2_writeLong(MCFSIM_IDECONFIG2, 0x00000000);
/*
* Setup chip selects...
*/
mbar_writeShort(MCFSIM_CSAR1, CFG_CSAR1);
mbar_writeShort(MCFSIM_CSCR1, CFG_CSCR1);
mbar_writeLong(MCFSIM_CSMR1, CFG_CSMR1);
mbar_writeShort(MCFSIM_CSAR0, CFG_CSAR0);
mbar_writeShort(MCFSIM_CSCR0, CFG_CSCR0);
mbar_writeLong(MCFSIM_CSMR0, CFG_CSMR0);
/* enable instruction cache now */
icache_enable();
}
/*
Function: deshabilitar_interrupciones
Deshabilita todas las interrupciones de registro de configuracion ICR1.
*/
void deshabilitar_interrupciones(void)
{
mbar_writeLong(MCFSIM_ICR1, DESHABILITAR_INTERRUPCIONES);
}
//------------------------------------------------------------------------------
// void setICR1(void)
//
// Descripción: Actualiza el vector ICR1 a 0x8888CB88, donde se marcan como no
// pendientes las interrupciones TIMER0 TIMER1 y se establecen
// sus prioridades como 4 y 3 respectivamente.
// Fijamos mayor prioridad al TIMER 0 para que podamos emplear el
// DAC respetando la temporización.
//
// Argumentos de Entrada: VOID
// Argumentos de Salida: VOID
//
// Autores: Equipo docente de SDII
//------------------------------------------------------------------------------
void ICR1_set(void)
{
mbar_writeLong(MCFSIM_ICR1, 0x8888C888);
}
