diff options
Diffstat (limited to 'cpu/at91rm9200')
| -rw-r--r-- | cpu/at91rm9200/interrupts.c | 253 | ||||
| -rw-r--r-- | cpu/at91rm9200/serial.c | 89 |
2 files changed, 183 insertions, 159 deletions
diff --git a/cpu/at91rm9200/interrupts.c b/cpu/at91rm9200/interrupts.c index 407df9c..d3adc43 100644 --- a/cpu/at91rm9200/interrupts.c +++ b/cpu/at91rm9200/interrupts.c @@ -41,111 +41,114 @@ extern void reset_cpu(ulong addr); #define TIMER_LOAD_VAL 0xffff /* macro to read the 16 bit timer */ -#define READ_TIMER (tmr->TC_CV) +#define READ_TIMER (tmr->TC_CV & 0x0000ffff) AT91PS_TC tmr; - +#ifdef CONFIG_USE_IRQ +#error There is no IRQ support for AT91RM9200 in U-Boot yet. +#else void enable_interrupts (void) { - return; + return; } int disable_interrupts (void) { - return 0; + return 0; } +#endif -void bad_mode(void) +void bad_mode (void) { - panic("Resetting CPU ...\n"); - reset_cpu(0); + panic ("Resetting CPU ...\n"); + reset_cpu (0); } -void show_regs(struct pt_regs * regs) +void show_regs (struct pt_regs *regs) { - unsigned long flags; -const char *processor_modes[]= -{ "USER_26", "FIQ_26" , "IRQ_26" , "SVC_26" , "UK4_26" , "UK5_26" , "UK6_26" , "UK7_26" , - "UK8_26" , "UK9_26" , "UK10_26", "UK11_26", "UK12_26", "UK13_26", "UK14_26", "UK15_26", - "USER_32", "FIQ_32" , "IRQ_32" , "SVC_32" , "UK4_32" , "UK5_32" , "UK6_32" , "ABT_32" , - "UK8_32" , "UK9_32" , "UK10_32", "UND_32" , "UK12_32", "UK13_32", "UK14_32", "SYS_32" -}; - - flags = condition_codes(regs); - - printf("pc : [<%08lx>] lr : [<%08lx>]\n" - "sp : %08lx ip : %08lx fp : %08lx\n", - instruction_pointer(regs), - regs->ARM_lr, regs->ARM_sp, - regs->ARM_ip, regs->ARM_fp); - printf("r10: %08lx r9 : %08lx r8 : %08lx\n", - regs->ARM_r10, regs->ARM_r9, - regs->ARM_r8); - printf("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n", - regs->ARM_r7, regs->ARM_r6, - regs->ARM_r5, regs->ARM_r4); - printf("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n", - regs->ARM_r3, regs->ARM_r2, - regs->ARM_r1, regs->ARM_r0); - printf("Flags: %c%c%c%c", - flags & CC_N_BIT ? 'N' : 'n', - flags & CC_Z_BIT ? 'Z' : 'z', - flags & CC_C_BIT ? 'C' : 'c', - flags & CC_V_BIT ? 'V' : 'v'); - printf(" IRQs %s FIQs %s Mode %s%s\n", - interrupts_enabled(regs) ? "on" : "off", - fast_interrupts_enabled(regs) ? "on" : "off", - processor_modes[processor_mode(regs)], - thumb_mode(regs) ? " (T)" : ""); + unsigned long flags; + const char *processor_modes[] = { + "USER_26", "FIQ_26", "IRQ_26", "SVC_26", + "UK4_26", "UK5_26", "UK6_26", "UK7_26", + "UK8_26", "UK9_26", "UK10_26", "UK11_26", + "UK12_26", "UK13_26", "UK14_26", "UK15_26", + "USER_32", "FIQ_32", "IRQ_32", "SVC_32", + "UK4_32", "UK5_32", "UK6_32", "ABT_32", + "UK8_32", "UK9_32", "UK10_32", "UND_32", + "UK12_32", "UK13_32", "UK14_32", "SYS_32", + }; + + flags = condition_codes (regs); + + printf ("pc : [<%08lx>] lr : [<%08lx>]\n" + "sp : %08lx ip : %08lx fp : %08lx\n", + instruction_pointer (regs), + regs->ARM_lr, regs->ARM_sp, regs->ARM_ip, regs->ARM_fp); + printf ("r10: %08lx r9 : %08lx r8 : %08lx\n", + regs->ARM_r10, regs->ARM_r9, regs->ARM_r8); + printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n", + regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4); + printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n", + regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0); + printf ("Flags: %c%c%c%c", + flags & CC_N_BIT ? 'N' : 'n', + flags & CC_Z_BIT ? 'Z' : 'z', + flags & CC_C_BIT ? 'C' : 'c', + flags & CC_V_BIT ? 'V' : 'v'); + printf (" IRQs %s FIQs %s Mode %s%s\n", + interrupts_enabled (regs) ? "on" : "off", + fast_interrupts_enabled (regs) ? "on" : "off", + processor_modes[processor_mode (regs)], + thumb_mode (regs) ? " (T)" : ""); } -void do_undefined_instruction(struct pt_regs *pt_regs) +void do_undefined_instruction (struct pt_regs *pt_regs) { - printf("undefined instruction\n"); - show_regs(pt_regs); - bad_mode(); + printf ("undefined instruction\n"); + show_regs (pt_regs); + bad_mode (); } -void do_software_interrupt(struct pt_regs *pt_regs) +void do_software_interrupt (struct pt_regs *pt_regs) { - printf("software interrupt\n"); - show_regs(pt_regs); - bad_mode(); + printf ("software interrupt\n"); + show_regs (pt_regs); + bad_mode (); } -void do_prefetch_abort(struct pt_regs *pt_regs) +void do_prefetch_abort (struct pt_regs *pt_regs) { - printf("prefetch abort\n"); - show_regs(pt_regs); - bad_mode(); + printf ("prefetch abort\n"); + show_regs (pt_regs); + bad_mode (); } -void do_data_abort(struct pt_regs *pt_regs) +void do_data_abort (struct pt_regs *pt_regs) { - printf("data abort\n"); - show_regs(pt_regs); - bad_mode(); + printf ("data abort\n"); + show_regs (pt_regs); + bad_mode (); } -void do_not_used(struct pt_regs *pt_regs) +void do_not_used (struct pt_regs *pt_regs) { - printf("not used\n"); - show_regs(pt_regs); - bad_mode(); + printf ("not used\n"); + show_regs (pt_regs); + bad_mode (); } -void do_fiq(struct pt_regs *pt_regs) +void do_fiq (struct pt_regs *pt_regs) { - printf("fast interrupt request\n"); - show_regs(pt_regs); - bad_mode(); + printf ("fast interrupt request\n"); + show_regs (pt_regs); + bad_mode (); } -void do_irq(struct pt_regs *pt_regs) +void do_irq (struct pt_regs *pt_regs) { - printf("interrupt request\n"); - show_regs(pt_regs); - bad_mode(); + printf ("interrupt request\n"); + show_regs (pt_regs); + bad_mode (); } static ulong timestamp; @@ -154,81 +157,103 @@ static ulong lastinc; int interrupt_init (void) { - tmr = AT91C_BASE_TC0; + tmr = AT91C_BASE_TC0; + + /* enables TC1.0 clock */ + *AT91C_PMC_PCER = 1 << AT91C_ID_TC0; /* enable clock */ - /* enables TC1.0 clock */ - *AT91C_PMC_PCER = 1 << AT91C_ID_TC0; /* enable clock */ + *AT91C_TCB0_BCR = 0; + *AT91C_TCB0_BMR = AT91C_TCB_TC0XC0S_NONE | AT91C_TCB_TC1XC1S_NONE | AT91C_TCB_TC2XC2S_NONE; + tmr->TC_CCR = AT91C_TC_CLKDIS; + tmr->TC_CMR = AT91C_TC_TIMER_DIV1_CLOCK; /* set to MCLK/2 */ - *AT91C_TCB0_BCR = 0; - *AT91C_TCB0_BMR = AT91C_TCB_TC0XC0S_NONE | AT91C_TCB_TC1XC1S_NONE | AT91C_TCB_TC2XC2S_NONE; - tmr->TC_CCR = AT91C_TC_CLKDIS; - tmr->TC_CMR = AT91C_TC_TIMER_DIV1_CLOCK; /* set to MCLK/2 */ + tmr->TC_IDR = ~0ul; + tmr->TC_RC = TIMER_LOAD_VAL; + lastinc = TIMER_LOAD_VAL; + tmr->TC_CCR = AT91C_TC_SWTRG | AT91C_TC_CLKEN; + timestamp = 0; - tmr->TC_IDR = ~0ul; - tmr->TC_RC = TIMER_LOAD_VAL; - lastinc = TIMER_LOAD_VAL; - tmr->TC_CCR = AT91C_TC_SWTRG | AT91C_TC_CLKEN; - timestamp = 0; - return (0); + return (0); } /* * timer without interrupts */ -void reset_timer(void) +void reset_timer (void) { - reset_timer_masked(); + reset_timer_masked (); } ulong get_timer (ulong base) { - return get_timer_masked() - base; + return get_timer_masked () - base; } void set_timer (ulong t) { - timestamp = t; + timestamp = t; } -void udelay(unsigned long usec) +void udelay (unsigned long usec) { - udelay_masked(usec); + udelay_masked(usec); } -void reset_timer_masked(void) +void reset_timer_masked (void) { - /* reset time */ - lastinc = READ_TIMER; - timestamp = 0; + /* reset time */ + lastinc = READ_TIMER; + timestamp = 0; } -ulong get_timer_masked(void) +ulong get_timer_masked (void) { - ulong now = READ_TIMER; - if (now >= lastinc) - { - /* normal mode */ - timestamp += now - lastinc; - } else { - /* we have an overflow ... */ - timestamp += now + TIMER_LOAD_VAL - lastinc; - } - lastinc = now; - - return timestamp; + ulong now = READ_TIMER; + + if (now >= lastinc) { + /* normal mode */ + timestamp += now - lastinc; + } else { + /* we have an overflow ... */ + timestamp += now + TIMER_LOAD_VAL - lastinc; + } + lastinc = now; + + return timestamp; } -void udelay_masked(unsigned long usec) +void udelay_masked (unsigned long usec) { - ulong tmo; + ulong tmo; + + tmo = usec / 1000; + tmo *= CFG_HZ; + tmo /= 1000; + + reset_timer_masked (); + + while (get_timer_masked () < tmo) + /*NOP*/; +} - tmo = usec / 1000; - tmo *= CFG_HZ; - tmo /= 1000; +/* + * This function is derived from PowerPC code (read timebase as long long). + * On ARM it just returns the timer value. + */ +unsigned long long get_ticks(void) +{ + return get_timer(0); +} - reset_timer_masked(); +/* + * This function is derived from PowerPC code (timebase clock frequency). + * On ARM it returns the number of timer ticks per second. + */ +ulong get_tbclk (void) +{ + ulong tbclk; - while(get_timer_masked() < tmo); - /*NOP*/; + tbclk = CFG_HZ; + return tbclk; } diff --git a/cpu/at91rm9200/serial.c b/cpu/at91rm9200/serial.c index f80fd43..43e1553 100644 --- a/cpu/at91rm9200/serial.c +++ b/cpu/at91rm9200/serial.c @@ -36,55 +36,54 @@ /* ggi thunder */ AT91PS_USART us = (AT91PS_USART) AT91C_BASE_DBGU; -void serial_setbrg(void) - { - DECLARE_GLOBAL_DATA_PTR; - int baudrate; +void serial_setbrg (void) +{ + DECLARE_GLOBAL_DATA_PTR; + int baudrate; - if ((baudrate = gd->bd->bi_baudrate) <= 0) - baudrate = CONFIG_BAUDRATE; - us->US_BRGR = 33 /* AT91C_MASTER_CLOCK / baudrate / 16 */; /* hardcode so no __divsi3 */ - } + if ((baudrate = gd->bd->bi_baudrate) <= 0) + baudrate = CONFIG_BAUDRATE; + us->US_BRGR = CFG_AT91C_BRGR_DIVISOR; /* hardcode so no __divsi3 */ +} -int serial_init(void) - { - /* make any port initializations specific to this port */ - *AT91C_PIOA_PDR = AT91C_PA31_DTXD | AT91C_PA30_DRXD; /* PA 31 & 30 */ - *AT91C_PMC_PCER = 1 << AT91C_ID_SYS; /* enable clock */ - serial_setbrg(); +int serial_init (void) +{ + /* make any port initializations specific to this port */ + *AT91C_PIOA_PDR = AT91C_PA31_DTXD | AT91C_PA30_DRXD; /* PA 31 & 30 */ + *AT91C_PMC_PCER = 1 << AT91C_ID_SYS; /* enable clock */ + serial_setbrg (); - us->US_CR = AT91C_US_RSTRX | AT91C_US_RSTTX; - us->US_CR = AT91C_US_RXEN | AT91C_US_TXEN; - us->US_MR = ( AT91C_US_CLKS_CLOCK | AT91C_US_CHRL_8_BITS | AT91C_US_PAR_NONE | AT91C_US_NBSTOP_1_BIT ); - us->US_IMR = ~0ul; - return (0); - } + us->US_CR = AT91C_US_RSTRX | AT91C_US_RSTTX; + us->US_CR = AT91C_US_RXEN | AT91C_US_TXEN; + us->US_MR = + (AT91C_US_CLKS_CLOCK | AT91C_US_CHRL_8_BITS | + AT91C_US_PAR_NONE | AT91C_US_NBSTOP_1_BIT); + us->US_IMR = ~0ul; + return (0); +} -void serial_putc(const char c) - { - if (c == '\n') - serial_putc('\r'); - while( (us->US_CSR & AT91C_US_TXRDY) == 0 ) - ; - us->US_THR=c; - } +void serial_putc (const char c) +{ + if (c == '\n') + serial_putc ('\r'); + while ((us->US_CSR & AT91C_US_TXRDY) == 0); + us->US_THR = c; +} -void -serial_puts (const char *s) - { - while (*s) - { - serial_putc (*s++); - } - } +void serial_puts (const char *s) +{ + while (*s) { + serial_putc (*s++); + } +} -int serial_getc(void) - { - while( (us->US_CSR & AT91C_US_RXRDY) == 0 ); - return us->US_RHR; - } +int serial_getc (void) +{ + while ((us->US_CSR & AT91C_US_RXRDY) == 0); + return us->US_RHR; +} -int serial_tstc(void) - { - return ((us->US_CSR & AT91C_US_RXRDY) == AT91C_US_RXRDY); - } +int serial_tstc (void) +{ + return ((us->US_CSR & AT91C_US_RXRDY) == AT91C_US_RXRDY); +} |